Hydraulic engineering pipeline welding device

Abstract

The invention relates to the technical field of pipeline welding, and particularly discloses a hydraulic engineering pipeline welding device which comprises a base, two mounting frames are slidably mounted on the top surface of the base and used for fixing a pipeline, the pipeline can rotate in the mounting frames, and a welding robot is fixedly mounted on the top surfaces of the mounting frames. The longest diameter and the shortest diameter of the cross sections at the ports of the two sets of pipelines are opposite through the centering assembly, so that the centers of the ellipses on the two sides are concentrically aligned, the thick edge and the thin edge of the pipelines can correspond to each other during welding, the effective welding thickness of the pipelines during welding is increased, and the welding efficiency is improved. The situation that stress concentration occurs in a local area of the pipeline, cracks occur in the welding process or after welding, the integrity of a welding seam and the service life of the pipeline are affected is avoided, meanwhile, the defects of incomplete fusion, slag inclusion and the like in the welding seam caused by too large unfitness of butt joint are avoided, and the purpose of improving the welding quality of the pipeline is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline welding, and particularly to a pipeline welding device for water conservancy projects. Background Art

[0002] A water conservancy project refers to a project constructed to control, regulate and utilize water resources to meet the needs of human life, production, ecological environment, etc. It covers multiple aspects such as the development, utilization, treatment, allocation, conservation and protection of water resources, and is an important infrastructure for ensuring the sustainable development of social economy and the balance of ecological environment. Among them, water conservancy pipelines play a crucial role in water conservancy projects and are key facilities for realizing the transportation, distribution and utilization of water resources. Since water conservancy pipelines usually need to operate in complex environmental conditions for a long time, such as underground, underwater or in the open air, and face various adverse factors such as soil corrosion, water flow scouring, temperature change, etc., water conservancy pipelines usually need to be welded to melt and fuse the metal materials at the pipe joints into one body to form a continuous metal structure, so as to improve the internal strength and sealing performance of the pipeline.

[0003] For example, Chinese Patent No. CN113042969B discloses an auxiliary device for welding water conservancy project pipelines and its use method. The auxiliary device includes a bracket. The lower part of the bracket is provided with a plurality of universal wheels distributed in an array. The bracket is provided with an axial driving member, the bracket is provided with a plurality of lifting members, the bracket is provided with a plurality of radial driving members, and the lifting members and the driving members are distributed at intervals. The use method includes: axial transmission, support, rotation, output. The welding auxiliary device of the present invention replaces the traditional hoisting operation, reduces the cost, reduces the input of manpower, and is beneficial to reducing the labor intensity of the staff; realizes the rotation of the pipe body and is suitable for welding operations with an inclined angle between pipe bodies.

[0004] However, when the pipeline is transported or hoisted, the pipe orifice may present an ovality (the ovality of the pipeline refers to the difference between the maximum diameter and the minimum diameter of the pipeline cross-section) under the action of its own gravity or external pressure, so that the shape of the pipe end is no longer a standard circle, making it difficult to achieve ideal concentric alignment when two pipelines are butted. This will not only increase the difficulty of butt joint adjustment before welding, but also reduce the actual effective welding thickness at the welding joint, resulting in a decline in the sealing performance of the pipeline. Summary of the Invention

[0005] The purpose of the present invention is to provide a wire stringing construction device for the installation of power equipment to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wiring construction device for installing power equipment, a water conservancy project pipeline welding device, comprising a base, two groups of mounting frames are slidably mounted on the top surface of the base, the two groups of mounting frames are used to fix the pipeline, and the pipeline can rotate in the mounting frame, and a welding robot is fixedly mounted on the top surface of the mounting frame;

[0007] Also included is a centering assembly for concentrically aligning the centers of the two groups of pipes.

[0008] Preferably, the centering assembly includes two groups of fixed axis frames installed on the top surface of the base, a fixed rotating shaft is fixedly installed between the two groups of fixed axis frames, two groups of sliding frames are rotatably installed on the outer wall of the fixed rotating shaft, and the sliding frames can slide along the outer wall of the fixed rotating shaft, and rotatable rotating rods are installed in the two groups of sliding frames, the outer walls of the two groups of rotating rods are jointly sleeved with rotating sleeves through flat keys, and a spring is provided between the two groups of rotating rods, and a centering assembly for positioning the center of the pipe mouth is provided at the ends of the two groups of rotating rods away from each other.

[0009] Preferably, the centering assembly includes a fixed block fixedly mounted on the side wall of the sliding frame, a rotating ring is rotatably mounted outside the fixed block, a sliding cavity is opened in the rotating ring, the rotating rod is inserted into the rotating ring and rotatably connected to the side wall of the sliding cavity, a rotating block is fixedly mounted on the outer wall of the rotating rod, at least a pair of colinear fixed sleeves are fixedly mounted on the outer wall of the rotating ring, a sliding rod is slidably mounted in the fixed sleeve, a sliding sleeve that can slide along the outer wall of the rotating ring is fixedly mounted on one end of the sliding rod, a compression spring is provided between the inner wall of the sliding sleeve and the rotating ring, a roller is fixedly mounted on the end of the sliding sleeve through the axis frame, and a ratchet block that can move the sliding rod is provided on the outer wall of the rotating block.

[0010] Preferably, a sliding gear is rotatably installed on the outer wall of the rotating rod, which is installed on the inner wall of the sliding cavity through a flat key and can be slidably adjusted. A fixed helical tooth that can mesh with the sliding gear is fixedly installed on the side wall of the rotating block. A rotating gear that can mesh with the sliding gear is fixedly installed on one end of the fixed block that penetrates into the sliding cavity. Electromagnets are buried on both sides of the sliding gear, and magnets with opposite magnetic poles are buried in the fixed helical teeth and the rotating gear. A pressure sensor is buried in the ratchet block on the outer wall of the rotating block, and the pressure sensor and the electromagnet are connected through an electrical signal.

[0011] Preferably, a fixing ring is fixedly installed on the top surface of the base. A side groove for the sliding frame to rotate out is formed in the side wall of the fixing ring. A cutting groove for the welding robot to access is formed on the other side of the fixing ring. A sliding ring capable of rotating and sliding along the inner wall of the fixing ring is installed on the inner wall of the fixing ring. A toothed ring is provided on the inner wall of the sliding ring. A fixed gear meshing with the toothed ring is rotatably installed on the side wall of the sliding frame through a rotating shaft. A coaxial gear coaxial with the fixed gear is also fixedly installed on the outer wall of the rotating shaft. A transmission gear meshing with the coaxial gear is fixedly installed on the outer wall of the rotating rod.

[0012] Preferably, a plurality of elastic telescopic rods corresponding to the fixed sleeves one by one are installed on the inner wall of the sliding ring. A roller is installed at one end of the elastic telescopic rod through a pipe.

[0013] Preferably, the mounting frame can vertically slide to adjust the height of the pipe.

[0014] Preferably, the rotation direction of the transmission gear can be adjusted to be the same as that of the toothed ring through a gear set.

[0015] Preferably, the transmission ratio between the coaxial gear and the transmission gear can be adjusted according to the pipe thickness.

[0016] Preferably, the side wall of the roller is provided with an inclined surface that is higher on the side close to the pipe and lower on the side far from the pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] First, the centering assembly of the present invention makes the longest diameter and the shortest diameter of the cross-section at the port of the two pipes opposite to each other, so that the centers of the ellipses on both sides are concentrically aligned. This can not only make the thick side and the thin side of the pipe correspond to each other during welding, thereby increasing the effective welding thickness during pipe welding, avoiding stress concentration in local areas of the pipe, resulting in cracks during or after welding, affecting the integrity of the weld and the service life of the pipe, but also avoiding defects such as lack of fusion and slag inclusion inside the weld due to excessive misalignment, so as to achieve the purpose of improving the pipe welding quality.

[0019] Second, the present invention confirms the longest diameter of the port of one side of the pipe through a set of centering assemblies, and drives the centering assemblies on the other side to rotate together through the rotating rod, so that the centering assembly on the other side drives the pipe to rotate while centering the port of the pipe on that side, until the projections of the longest diameter and the shortest diameter of the cross-section of the two pipe ports on the same vertical plane are collinear (the longest diameter line and the shortest diameter line are perpendicular to each other), then it can be ensured that the ellipse centers at the ports of the two pipes are on the same horizontal line, and the centering of the ports of the two pipes is completed.

[0020] III. Through the cooperation between the pressure sensor and the sliding gear, when the extension amounts of the four groups of rotating rods are the same, the rotating ring, the rotating block, and the rotating rods form an integral body for rotation, and the inner wall of the pipeline is repaired by rolling. When there are pits on the inner wall of the pipeline, the rotating ring, the rotating block, and the rotating rods cooperate together to re-center the inner wall of the pipeline, and perform dynamic repair on the inner wall of the pipeline by real-time monitoring. Even if the bending condition of the inner wall of the pipeline is complex and changeable, the repair of the pipeline can still be completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic three-dimensional structure of the present invention Figure 1 ;

[0022] Figure 2 is a schematic three-dimensional structure of the present invention Figure 2 ;

[0023] Figure 3 is a schematic side sectional view of the present invention;

[0024] Figure 4 In the present invention Figure 3 is an isometric sectional view;

[0025] Figure 5 is a schematic front sectional view of the present invention;

[0026] Figure 6 In the present invention Figure 5 is an isometric sectional view;

[0027] Figure 7 is the present invention Figure 4 is a partial enlarged view at A;

[0028] Figure 8 is a schematic diagram of the deformation repair direction of the present invention.

[0029] In the figure: 1. Base; 2. Mounting frame; 3. Fixed ring; 4. Welding robot; 5. Fixed shaft frame; 6. Fixed rotating shaft; 7. Sliding frame; 8. Sliding ring; 9. Elastic telescopic rod; 10. Tooth ring; 11. Sliding rod; 12. Rotating rod; 13. Fixed gear; 14. Roller; 15. Sliding sleeve; 16. Fixed sleeve; 17. Rotating ring; 18. Rotating block; 19. Sliding cavity; 20. Fixed block; 21. Transmission gear; 22. Sliding gear; 23. Fixed helical tooth; 24. Rotating gear; 25. Rotating sleeve; 26. Coaxial gear. DETAILED DESCRIPTION OF THE INVENTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 to 8 , the present invention provides a technical solution: a pipeline welding device for water conservancy projects, including a base 1. Two mounting frames 2 are slidably mounted on the top surface of the base 1. Both of the two mounting frames 2 are used to fix the pipeline, and the pipeline can rotate within the mounting frame 2. A welding robot 4 is fixedly mounted on the top surface of the mounting frame 2;

[0032] It further includes a centering component, which is used to concentrically align the centers of the two pipelines.

[0033] When there is ovality at the pipeline port, there is a difference in the diameters of the port cross-sections. This not only causes the center of the port to change from the focus on the diameter line to the focus between the longest diameter and the shortest diameter, making it difficult to achieve ideal concentric alignment when the two pipelines are butted, but also because the pipeline port is no longer a standard circle. The shortest diameter part is compressed, making the pipeline thickness at this part thinner, while the longest diameter part is thickened by the internal extrusion force from both sides. When the thick edges and thin edges of the two pipelines meet, the effective welding thickness is the thickness of the thin edge, which may cause an increase in the misalignment amount at the weld. Exceeding the standard misalignment amount not only affects the welding appearance quality but may also cause internal defects in the weld (such as lack of fusion, slag inclusion, etc.), thereby reducing the strength and sealing performance of the weld.

[0034] When this device is in use, first install the two pipelines in the two mounting frames 2 respectively. Subsequently, use the centering component to align the centers of the joints of the two pipelines, so that when there is ovality at the ports of the two pipelines, it is ensured that the elliptical centers of the cross-sections at the joints of the two pipelines are concentrically aligned, that is, the longest diameters and the shortest diameters of the cross-sections of the ports of the two pipelines on both sides are respectively aligned, so that the thick edges and thin edges during pipeline welding also correspond to each other. At this time, the effective welding thickness between the two thick edges is the thickness of the thick edge, and the effective welding thickness between the thin edges is the thickness of the thin edge. Compared with the situation where the effective welding thickness is the thickness of the thin edge when the pipeline centers are not aligned, there is a significant improvement, avoiding cracks during or after pipeline welding caused by the internal stress of ovality, affecting the integrity of the weld and the service life of the pipeline. Subsequently, move the aligned pipelines closer to each other and weld the pipeline ports through the welding robot 4 to complete the welding between the two pipelines.

[0035] In this way, through the centering component, the longest diameter and the shortest diameter of the cross-section at the two sets of pipe ports are made to face each other respectively, so that the centers of the two ellipses on both sides are concentrically aligned. This not only enables the thick edges and thin edges during pipe welding to correspond to each other, thereby increasing the effective welding thickness during pipe welding, avoiding stress concentration in local areas of the pipe, resulting in cracks during or after the welding process and affecting the integrity of the weld and the service life of the pipe, but also avoiding defects such as incomplete fusion and slag inclusion inside the weld due to excessive misalignment, so as to achieve the purpose of improving the pipe welding quality.

[0036] Furthermore, the centering component includes two sets of fixed shaft frames 5 installed on the top surface of the base 1. A fixed rotating shaft 6 is fixedly installed between the two sets of fixed shaft frames 5. Two sets of sliding frames 7 are rotatably installed on the outer wall of the fixed rotating shaft 6, and the sliding frames 7 can slide along the outer wall of the fixed rotating shaft 6. Rotating rods 12 that can rotate are installed inside both sets of sliding frames 7. A rotating sleeve 25 is jointly sleeved on the outer walls of the two sets of rotating rods 12 through flat keys, and a spring is provided between the two sets of rotating rods 12. Centering components for positioning the center at the pipe orifice are provided at the ends of the two sets of rotating rods 12 that are away from each other.

[0037] According to the above embodiment, a specific embodiment of the centering component is provided. Specifically, refer to Figure 3 , after the two sets of pipes are respectively installed in the two sets of mounting frames 2 on both sides, the rotation restriction of the pipes is released, and the two sets of sliding frames 7 are respectively rotated by an external driving component (such as a motor) until the centering components are in the same straight line as the pipes. Then, the two sliding frames 7 on both sides are respectively driven by a cylinder or other driving component to slide until the centering components enter the pipe ports. At this time, the centering components automatically identify the longest diameter and the shortest diameter of the cross-section of the pipe port. When the centering component at one side of the pipe port completes the centering of the cross-section of the pipe, since the projections of the longest diameters of the two pipe ports on the same vertical plane are not collinear, when the centering component on this side identifies the longest diameter of the cross-section, it drives the rotating rod 12 on the same side to rotate together, and at the same time drives the centering component on the other side to rotate together. When the centering component on the other side starts to center, since the rotating rod 12 on this side cannot rotate, it drives the pipe on this side to rotate along the mounting frame 2. At this time, the projections of the long sides identified by the two centering components on the same vertical plane are in a collinear state, making the elliptical centers of the cross-sections of the two pipe ports concentrically aligned, and thus the centering of the two pipe ports on both sides can be completed.

[0038] In this way, the longest diameter of the pipe port on one side is confirmed by a set of centering components, and the centering components on the other side are driven to rotate together by the rotating rod 12, so that the centering components on the other side can drive the pipe to rotate while centering the pipe port on that side, until the projections of the longest diameter and the shortest diameter of the cross-sections of the pipe ports on both sides on the same vertical plane are in a collinear state (the longest diameter and the shortest diameter lines are perpendicular to each other), thereby ensuring that the centers of the ellipses at the pipe ports on both sides are on the same horizontal line, thereby completing the centering of the pipe ports on both sides.

[0039] Furthermore, the centering assembly includes a fixed block 20 fixedly mounted on the side wall of the sliding frame 7, a rotating ring 17 is rotatably mounted outside the fixed block 20, a sliding cavity 19 is opened in the rotating ring 17, the rotating rod 12 is inserted into the rotating ring 17 and rotatably connected to the side wall of the sliding cavity 19, a rotating block 18 is fixedly mounted on the outer wall of the rotating rod 12, at least a pair of colinear fixed sleeves 16 are fixedly mounted on the outer wall of the rotating ring 17, a sliding rod 11 is slidably mounted in the fixed sleeve 16, a sliding sleeve 15 that can slide along the outer wall of the rotating ring 17 is fixedly mounted on one end of the sliding rod 11, a compression spring is provided between the inner wall of the sliding sleeve 15 and the rotating ring 17, a roller 14 is fixedly mounted on the end of the sliding sleeve 15 through the shaft frame, and a ratchet block that can move the sliding rod 11 is provided on the outer wall of the rotating block 18.

[0040] According to the above embodiment, a specific embodiment of a centering component is provided. Figure 3 When the centering assembly on one side enters the pipe port, the sliding rod 11 and the sliding sleeve 15 perform centrifugal motion under the push of the compression spring. At this time, multiple groups of rollers 14 are affected by different pressures in the ellipse and start to rotate with the rotating rod 12 as the center (in this case, four groups perpendicular to each other are preferably selected) until the pressures on the relative rollers 14 are consistent, that is, the contact points between the two relative groups of rollers 14 and the pipe are consistent in distance from the rotating rod 12. Under the action of the compression spring, the lengths of two groups of rollers 14, the rotating ring 17 and the fixed sleeve 16 are the longest (and are collinear with the longest diameter of the section), while the lengths of the other two groups of rollers 14, the rotating ring 17 and the fixed sleeve 16 are the shortest, so that the rotating rod 12 is at the focus of the longest diameter and the shortest diameter, and the centering of the pipe can be completed.

[0041] In this way, by applying the same centrifugal force to four groups of mutually perpendicular rollers 14, the rollers 14 and the sliding sleeves 15 are extended outward with the same force. Since the support force of the inner wall of the pipe on each group of rollers 14 is different, under the action of the compression spring, multiple groups of rollers 14 can be driven to rotate along the inner wall of the pipe until two groups of rollers 14 are on the longest diameter line and the other two groups of rollers 14 are on the shortest diameter line, so that the support force and thrust on the relative rollers 14 are balanced with each other, ensuring that the rotating rod 12 is at the focus between the longest diameter and the shortest diameter, and the centering of the cross section of the pipe at that location can be completed.

[0042] Further, a sliding gear 22 is rotatably installed on the outer wall of the rotating rod 12. The sliding gear 22 is installed on the inner side wall of the sliding cavity 19 through a flat key and can be slidably adjusted. A fixed helical tooth 23 that can mesh with the sliding gear 22 is fixedly installed on the side wall of the rotating block 18. One end of the fixed block 20 that penetrates into the sliding cavity 19 is fixedly installed with a rotating gear 24 that can mesh with the sliding gear 22. Electromagnets are embedded on both sides of the sliding gear 22, and magnets with opposite magnetic poles are embedded in both the fixed helical tooth 23 and the rotating gear 24. A pressure sensor is embedded in the ratchet block on the outer wall of the rotating block 18, and the pressure sensor is electrically connected to the electromagnet through an electrical signal.

[0043] According to the above embodiments, a specific embodiment for repairing the pipe ovality is provided. Specifically, refer to Figure 8 , when two groups of rollers 14 are on the longest diameter line and the other two groups of rollers 14 are on the shortest diameter line, at this time, the multiple groups of rollers 14 are in a balanced position and do not rotate. At this time, the rotating rod 12 is driven by an external driving structure to drive the rotating block 18 to rotate together. Since the two sliding rods 11 on the longest diameter are centrifugally separated from the contact with the rotating block 18 under the action of the compression spring at this time, and the two sliding rods 11 on the shortest diameter still maintain contact with the rotating block 18 under the influence of the inner wall of the pipe, the sliding rods 11 at the shortest diameter are centrifugally outward, and the inner wall of the pipe at this place is pushed outward by the rollers 14. And the pressure sensor detects that the pressures of the multiple groups of sliding rods 11 on the rotating block 18 are not equal. The electromagnet is used to drive the sliding gear 22 to mesh with the rotating gear 24. At the same time, the inner wall of the pipe at the longest diameter is pulled inward by the tension at the shortest diameter, driving the sliding rods 11 and the sliding sleeves 15 at this place to move centripetally until the four sliding rods 11 all maintain contact with the rotating block 18. When the pressure sensor detects that the pressures of the four sliding rods 11 on the rotating block 18 are the same, that is, when the lengths of the four rotating rods 12 are pairwise the same, it indicates that the four rotating rods 12 coincide with the two mutually disposed diameter lines on the standard circular cross-section at this time. At this time, the electromagnet drives the sliding gear 22 to slide. Specifically, refer to Figure 4, disengages from the engagement with the rotating gear 24 and engages with the fixed helical gear 23, so that the rotating ring 17, the rotating block 18, and the rotating rod 12 form an integral body to rotate at this time, driving multiple groups of rollers 14 to start rotating in the arc of a standard circle, and rolling and repairing the inner wall of the pipeline until the inner wall of the pipeline forms or approaches a standard circle, completing the repair of the inner wall of the pipeline. When there are pits on the inner wall of the pipeline, at this time, when the pressure sensor detects that a certain sliding rod 11 disengages from the contact with the rotating block 18 under the action of the compression spring or the pressure is uneven, the sliding gear 22 is driven by the electromagnet to slide and engage with the rotating gear 24, and then the inner wall of the pipeline is repositioned through the rotating rod 12 and the rotating block 18, and after the positioning is completed, the integral body formed by the rotating ring 17, the rotating block 18, and the rotating rod 12 continues to rotate to repair the inner wall of the pipeline until the repair of the inner wall of the pipeline is completely completed.

[0044] In this way, through the cooperation between the pressure sensor and the sliding gear 22, when the extension amounts of the four groups of rotating rods 12 are the same, the rotating ring 17, the rotating block 18, and the rotating rod 12 form an integral body to rotate, and the inner wall of the pipeline is repaired by rolling. When there are pits on the inner wall of the pipeline, the rotating ring 17, the rotating block 18, and the rotating rod 12 cooperate together to re-center the inner wall of the pipeline, and perform dynamic repair on the inner wall of the pipeline with real-time monitoring. Even if the bending condition of the inner wall of the pipeline is complex and changeable, the repair of the pipeline can still be completed.

[0045] Furthermore, a fixed ring 3 is fixedly installed on the top surface of the base 1. A side groove for the sliding frame 7 to rotate out is provided on the side wall of the fixed ring 3, a cutting groove for the welding robot 4 to access is provided on the other side of the fixed ring 3, a sliding ring 8 that can rotate and slide and adjust along the inner wall of the fixed ring 3 is installed on the inner wall of the fixed ring 3, a toothed ring 10 is provided on the inner wall of the sliding ring 8, a fixed gear 13 that meshes with the toothed ring 10 is rotatably installed on the side wall of the sliding frame 7 through a rotating shaft, a coaxial gear 26 coaxial with the fixed gear 13 is also fixedly installed on the outer wall of the rotating shaft, and a transmission gear 21 that meshes with the coaxial gear 26 is fixedly installed on the outer wall of the rotating rod 12.

[0046] According to the above embodiment, a specific embodiment for driving the rotation of the rotating rod 12 is provided. When an external driving structure (such as a motor) drives the sliding ring 8 to rotate, the sliding ring 8 drives the fixed gear 13 to rotate together through the toothed ring 10, and the fixed gear 13 can drive the transmission gear 21 and the rotating rod 12 to rotate together through the coaxial gear 26, completing the driving of the rotating rod 12.

[0047] Furthermore, multiple groups of elastic telescopic rods 9 corresponding to the fixed sleeves 16 are installed on the inner wall of the sliding ring 8, and a roller 14 is installed at one end of the elastic telescopic rod 9 through a pipeline.

[0048] Furthermore, the rotation direction of the transmission gear 21 can be adjusted to be the same as the rotation direction of the toothed ring 10 through the gear set.

[0049] Furthermore, the transmission ratio between the coaxial gear 26 and the transmission gear 21 can be adjusted according to the pipe thickness.

[0050] According to the above embodiment, since multiple groups of elastic telescopic rods 9 corresponding to the fixed sleeve 16 one by one are installed on the inner wall of the sliding ring 8, and a roller 14 is installed on one end of the elastic telescopic rod 9 for the pipeline, that is, when the sliding sleeve 15 drives the roller 14 to repair the inner wall of the pipeline, the sliding ring 8 will synchronously drive the elastic telescopic rod 9 and the roller 14 to repair the outer wall of the pipeline, and the transmission ratio between the coaxial gear 26 and the transmission gear 21 can be adjusted according to the pipe thickness, enabling the device to repair the inner and outer walls of the pipeline synchronously, so that the device can repair pipelines of different thicknesses.

[0051] It is worth mentioning that when the pipeline has high toughness, it can be selected to make the rotation direction of the transmission gear 21 adjustable to be the same as the rotation direction of the toothed ring 10 through the gear set, increasing the repair speed of the device for the pipeline. When the pipeline has low toughness, the rotation direction of the transmission gear 21 can be adjusted to be opposite to the rotation direction of the toothed ring 10 through the gear set, reducing the repair amount of the pipeline when the roller 14 rolls over one week, and avoiding excessive extrusion force on the pipeline by the roller 14 resulting in pipeline cracking.

[0052] Furthermore, the mounting frame 2 can be vertically slid to adjust the height of the pipeline.

[0053] According to the above embodiment, since the mounting frame 2 can be vertically slid to adjust the height of the pipeline, the centering component can automatically adjust when centering the two pipeline ports, causing the centers of the elliptical ports of the two pipelines to be on the same straight line.

[0054] Furthermore, the side wall of the roller 14 is provided with an inclined surface that is higher on the side close to the pipeline and lower on the side away from the pipeline.

[0055] According to the above embodiment, by setting the side wall of the roller 14 to have an inclined surface that is higher on the side close to the pipeline and lower on the side away from the pipeline, the centering component can more easily break through the resistance of the compression spring and enter the pipeline port, and centering can be completed during the process of entering the pipeline port.

[0056] The standard parts used in this embodiment can be directly purchased from the market. For the non-standard structural components described in the specification and drawings, they can also be directly processed without any doubt according to the existing technical knowledge. At the same time, the connection methods of each component adopt the mature conventional means in the existing technology, and the machines, parts, and equipment all adopt the conventional models in the existing technology, so no specific description will be made here.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipeline welding device for water conservancy projects, comprising a base (1), characterized in that: Two groups of mounting frames (2) are slidably mounted on the top surface of the base (1), and the two groups of mounting frames (2) are used to fix the pipeline, and the pipeline can rotate inside the mounting frames (2), and a welding robot (4) is fixedly mounted on the top surface of the mounting frames (2); Also included is a centering assembly for concentrically aligning the centers of the two groups of pipes.

2. The water conservancy project pipeline welding device according to claim 1, characterized in that: The centering assembly comprises two groups of fixed shaft frames (5) mounted on the top surface of the base (1), a fixed rotating shaft (6) being fixedly mounted between the two groups of fixed shaft frames (5), two groups of sliding frames (7) being rotatably mounted on the outer wall of the fixed rotating shaft (6), and the sliding frames (7) being capable of sliding along the outer wall of the fixed rotating shaft (6), a rotatable rotating rod (12) being mounted in each of the two groups of sliding frames (7), a rotating sleeve (25) being commonly sleeved on the outer wall of the two groups of rotating rods (12) via a flat key, a spring being arranged between the two groups of rotating rods (12), and a centering assembly for locating the center of the pipe mouth being arranged at the ends of the two groups of rotating rods (12) which are away from each other.

3. The water conservancy project pipeline welding device according to claim 2, characterized in that: The centering assembly comprises a fixed block (20) fixedly mounted on the side wall of the sliding frame (7); a rotating ring (17) is rotatably mounted on the outside of the fixed block (20); a sliding cavity (19) is provided in the rotating ring (17); the rotating rod (12) penetrates into the rotating ring (17) and is rotatably connected to the side wall of the sliding cavity (19); a rotating block (18) is fixedly mounted on the outer wall of the rotating rod (12); at least one pair of colinear fixed sleeves (16) are fixedly mounted on the outer wall of the rotating ring (17); a sliding rod (11) is slidably mounted in the fixed sleeve (16); a sliding sleeve (15) capable of sliding along the outer wall of the rotating ring (17) is fixedly mounted on one end of the sliding rod (11); a compression spring is provided between the inner wall of the sliding sleeve (15) and the rotating ring (17); a roller (14) is fixedly mounted on the end of the sliding sleeve (15) via an axle frame; and a ratchet block capable of moving the sliding rod (11) is provided on the outer wall of the rotating block (18).

4. The water conservancy project pipeline welding device according to claim 3, characterized in that: A sliding gear (22) is rotatably mounted on the outer wall of the rotating rod (12) and is mounted on the inner wall of the sliding cavity (19) via a flat key and can be slidably adjusted. A fixed helical tooth (23) that can mesh with the sliding gear (22) is fixedly mounted on the side wall of the rotating block (18). A rotating gear (24) that can mesh with the sliding gear (22) is fixedly mounted on one end of the fixed block (20) that penetrates into the sliding cavity (19). Electromagnets are embedded on both sides of the sliding gear (22), and magnets with opposite magnetic poles are embedded in the fixed helical tooth (23) and the rotating gear (24). A pressure sensor is embedded in the ratchet block on the outer wall of the rotating block (18), and the pressure sensor is connected to the electromagnet via an electrical signal.

5. The water conservancy project pipeline welding device according to claim 4, characterized in that: A fixing ring (3) is fixedly installed on the top surface of the base (1). A side groove for the sliding frame (7) to turn out is formed on the side wall of the fixing ring (3). A cutting groove for the welding robot (4) to access is formed on the other side of the fixing ring (3). A sliding ring (8) capable of rotating and slidingly adjusting along the inner wall of the fixing ring (3) is installed on the inner wall of the fixing ring (3). A toothed ring (10) is provided on the inner wall of the sliding ring (8). A fixed gear (13) meshing with the toothed ring (10) is rotatably installed on the side wall of the sliding frame (7) through a rotating shaft. A coaxial gear (26) coaxial with the fixed gear (13) is also fixedly installed on the outer wall of the rotating shaft. A transmission gear (21) meshing with the coaxial gear (26) is fixedly installed on the outer wall of the rotating rod (12).

6. The water conservancy project pipeline welding device according to claim 3, characterized in that: A plurality of elastic telescopic rods (9) corresponding to the fixed sleeves (16) one by one are installed on the inner wall of the sliding ring (8). A roller (14) is installed at one end of the elastic telescopic rod (9) through a pipeline.

7. The pipeline welding device for water conservancy projects according to any one of claims 1-6, characterized in that: The mounting frame (2) can vertically slide to adjust the pipeline height.

8. The water conservancy project pipeline welding device according to claim 5, wherein: The rotation direction of the transmission gear (21) can be adjusted to be the same as that of the toothed ring (10) through a gear set.

9. The water conservancy project pipeline welding device according to claim 8, characterized in that: The transmission ratio between the coaxial gear (26) and the transmission gear (21) can be adjusted according to the pipeline thickness.

10. The water conservancy project pipeline welding device according to claim 3, characterized in that: The side wall of the roller (14) is provided with an inclined surface that is higher on the side close to the pipeline and lower on the side away from the pipeline.

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