Hydraulic engineering pipeline welding device

Abstract

The application relates to the technical field of pipeline welding, and particularly discloses a water conservancy project pipeline welding device, which comprises a base, two groups of mounting racks are slidably arranged on the top surface of the base, the two groups of mounting racks are used for fixing pipelines, the pipelines can rotate in the mounting racks, and welding robots are fixedly arranged on the top surfaces of the mounting racks. The longest diameter and the shortest diameter of the cross sections of the two groups of pipeline ports are respectively opposite to each other through the centring assembly, so that the centers of the two sides of the ellipse are concentrically aligned. The thick edges and the thin edges during pipeline welding can be corresponded to each other, the effective welding thickness during pipeline welding is increased, stress concentration in a local area of the pipeline is avoided, cracks in the welding process or after the welding are avoided, the integrity of a weld and the service life of the pipeline are affected, and the welding quality of the pipeline is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline welding, in particular to a water conservancy pipeline welding device. BACKGROUND

[0002] Water conservancy engineering refers to the construction of engineering projects for the control, regulation and utilization of water resources to meet the needs of human life, production, ecological environment and other needs. It covers the development, utilization, management, allocation, conservation and protection of water resources, and is an important infrastructure for the sustainable development of social economy and the balance of ecological environment. Among them, water conservancy pipeline plays a crucial role in water conservancy engineering and is a key facility for realizing water resource transportation, distribution and utilization. Since water conservancy pipelines usually need to operate for a long time under complex environmental conditions, such as underground, water or open air, they are subject to soil corrosion, water flow erosion, temperature changes and other adverse factors. Therefore, water conservancy pipelines usually need to be welded to melt and fuse the metal materials at the pipe connection, forming a continuous metal structure to improve the internal strength and sealing performance of the pipeline.

[0003] For example, Chinese Patent No. CN113042969B discloses a water conservancy pipeline welding auxiliary device and its use method. The auxiliary device includes a support, an array of universal wheels is arranged below the support, an axial driving member is arranged on the support, a plurality of lifting members are arranged on the support, a plurality of radial driving members are arranged on the support, and the lifting members are arranged at intervals with the driving members. The use method includes axial transmission, support, rotation and output. The welding auxiliary device replaces the traditional hoisting operation, reduces costs, reduces labor input, and helps reduce the labor intensity of workers; it realizes the rotation of the pipe body and is suitable for welding operations with an inclination angle between the pipe bodies.

[0004] However, the pipe may become elliptical (the pipe ellipticity refers to the difference between the maximum diameter and the minimum diameter of the pipe cross section) due to its own gravity or external pressure during transportation or hoisting, so that the shape of the pipe end is no longer a standard circle, making it difficult to achieve ideal concentric alignment when two pipes are connected. Not only does this increase the difficulty of aligning before welding, but it also reduces the actual effective welding thickness of the welded joint, resulting in a decrease in the sealing performance of the pipeline. SUMMARY

[0005] The present application aims to provide a wire erection construction device for power equipment installation to solve at least one of the technical problems existing in the prior art.

[0006] In order to achieve the above object, the application provides the following technical scheme: a stringing construction device for power equipment installation and a water conservancy project pipeline welding device.

[0007] The centering assembly is used for concentric alignment of the centers of the two groups of pipelines.

[0008] Preferably, the centering assembly comprises two groups of fixed shaft frames installed on the top surface of the base, a fixed rotating shaft fixedly installed between the two groups of fixed shaft frames, two groups of sliding frames rotatably installed on the outer wall of the fixed rotating shaft and capable of sliding along the outer wall of the fixed rotating shaft, two groups of rotating rods rotatably installed in the two groups of sliding frames, a rotating sleeve commonly sleeved on the outer walls of the two groups of rotating rods through a key, springs arranged between the two groups of rotating rods, and centering assemblies arranged at the ends of the two groups of rotating rods away from each other and used for positioning the centers of the pipe openings.

[0009] Preferably, the centering assembly comprises a fixed block fixedly installed on the side wall of the sliding frame, a rotating ring rotatably installed on the outer wall of the fixed block, a sliding cavity formed in the rotating ring, the rotating rod penetrating into the rotating ring and rotatably connected to the side wall of the sliding cavity, a rotating block fixedly installed on the outer wall of the rotating rod, at least one pair of collinear fixed sleeves fixedly installed on the outer wall of the rotating ring, a sliding rod slidably installed in the fixed sleeve, a sliding sleeve fixedly installed at one end of the sliding rod and capable of sliding along the outer wall of the rotating ring, a compression spring arranged between the inner wall of the sliding sleeve and the rotating ring, a roller fixedly installed on the end of the sliding sleeve through a shaft frame, and a ratchet block provided on the outer wall of the rotating block and capable of driving the sliding rod.

[0010] Preferably, a sliding gear rotatably installed on the inner side wall of the sliding cavity and capable of being slidably adjusted through a key is rotatably installed on the outer wall of the rotating rod, a fixed bevel gear capable of being meshed with the sliding gear is fixedly installed on the side wall of the rotating block, a rotating gear capable of being meshed with the sliding gear is fixedly installed at the end of the fixed block penetrating into the sliding cavity, electromagnets are embedded on both sides of the sliding gear, magnets with opposite magnetic poles are embedded in the fixed bevel gear and the rotating gear, a pressure sensor is embedded in the ratchet block on the outer wall of the rotating block, and the pressure sensor and the electromagnets are connected through electrical signals.

[0011] Preferably, the base top surface is fixedly provided with a fixing ring, the side wall of the fixing ring is provided with a side slot for the sliding frame to rotate out, the other side of the fixing ring is provided with a cutting slot for the welding robot to access, the inner wall of the fixing ring is provided with a sliding ring capable of rotating and sliding adjusting along the inner wall of the fixing ring, the inner wall of the sliding ring is provided with a gear ring, the side wall of the sliding frame is rotatably provided with a fixed gear meshing with the gear ring through a rotating shaft, and the outer wall of the rotating shaft is further fixedly provided with a coaxial gear coaxial with the fixed gear.

[0012] Preferably, the inner wall of the sliding ring is provided with a plurality of elastic telescopic rods corresponding to the fixed sleeve.

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

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

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

[0016] Preferably, the side wall of the roller is inclined, with the side close to the pipeline being higher and the side away from the pipeline being lower.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] Firstly, the present application uses a centering assembly to make the longest diameter and the shortest diameter of the cross sections at the two pipeline ports opposite to each other, so that the centers of the two ellipses are concentrically aligned. This can not only make the thick edge and the thin edge of the pipeline correspond to each other during welding, but also increase the effective welding thickness during pipeline welding, avoid stress concentration in local areas of the pipeline, and cause cracks during welding or after welding, affecting the integrity of the weld and the service life of the pipeline. At the same time, it can also avoid excessive misalignment, which can cause defects such as incomplete fusion and slag inclusion in the weld, so as to improve the quality of pipeline welding.

[0019] Secondly, the present application confirms the longest diameter of the pipeline port on one side through a set of centering assemblies, and drives the other side centering assembly to rotate through a rotating rod, so that the other side centering assembly rotates the pipeline while centering the pipeline port on the other side. Until the projections of the longest diameter and the shortest diameter of the cross sections of the pipeline ports on the two sides on the same vertical plane are in a collinear state (the longest diameter and the shortest diameter lines are perpendicular to each other), it can be ensured that the centers of the ellipses at the pipeline ports on the two sides are on the same horizontal line, and the centering of the pipeline ports on the two sides is completed.

[0020] Thirdly, the application makes the four groups of rotating rods have the same extension amount, and the rotating ring, rotating block and rotating rod form an integral whole to rotate and roll to repair the inner wall of the pipeline, and when the inner wall of the pipeline has a pit, the rotating ring, rotating block and rotating rod cooperate to re-center the inner wall of the pipeline and dynamically repair the inner wall of the pipeline in real time, so that the pipeline can be repaired even if the inner wall of the pipeline is complex and changeable. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the three-dimensional structure of the application Figure 1 ;

[0022] Figure 2 is a schematic diagram of the three-dimensional structure of the application Figure 2 ;

[0023] Figure 3 is a side view of the application

[0024] Figure 4 is an isometric view of the application Figure 3 ;

[0025] Figure 5 is a front view of the application

[0026] Figure 6 is an isometric view of the application Figure 5 ;

[0027] Figure 7 is a partial enlarged view of A in the application Figure 4 ;

[0028] Figure 8 is a schematic diagram of the deformation repair direction of the application

[0029] In the figure: 1, base; 2, mounting frame; 3, fixed ring; 4, welding robot; 5, fixed shaft support; 6, fixed rotating shaft; 7, sliding frame; 8, sliding ring; 9, elastic telescopic rod; 10, gear 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 gear; 24, rotating gear; 25, rotating sleeve; 26, coaxial gear. DETAILED DESCRIPTION

[0030] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0031] Please refer to Figures 1 to 8 The present application provides a technical solution: a water conservancy project pipeline welding device, comprising a base 1, two groups of mounting racks 2 are slidably installed on the top surface of the base 1, both groups of mounting racks 2 are used for fixing the pipeline, and the pipeline can rotate in the mounting rack 2, and a welding robot 4 is fixedly installed on the top surface of the mounting rack 2;

[0032] It also includes a centering assembly, which is used to make the centers of the two groups of pipelines concentrically aligned.

[0033] When the pipeline port has ellipticity, the diameter of the port cross section has a difference, which not only changes the center of the port from the focus on the diameter line to the focus between the longest diameter and the shortest diameter, but also makes it difficult to achieve ideal concentric alignment when the two pipelines are butt-jointed. In addition, since the pipeline port is no longer a standard circle, the shortest diameter is compressed, making the pipeline thickness at this position thinner, while the longest diameter is thickened due to the internal extrusion force from both sides. When the thick edge and the thin edge of the two groups of pipelines are connected, the effective welding thickness is the thickness of the thin edge, which may increase the misalignment of the weld, and the misalignment exceeding the standard not only affects the appearance quality of the welding, but also may cause internal defects of the weld (such as incomplete fusion, slag inclusion, etc.), thereby reducing the strength and sealing performance of the weld.

[0034] When the device is used, first, two groups of pipelines are respectively installed in two groups of mounting racks 2, and then the centering assembly is used to align the centers of the connection positions of the two groups of pipelines, so that when the two groups of pipeline ports have ellipticity, the elliptical centers of the cross sections of the connection positions of the two groups of pipelines are concentrically aligned with each other, that is, the longest diameter and the shortest diameter of the cross sections of the pipeline ports on both sides are aligned with each other, so that the thick edge and the thin edge of the pipeline are also corresponding to each other when the pipeline is welded. 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, which is greatly improved compared to the case where the centers of the pipelines are not aligned, and the effective welding thickness is the thickness of the thin edge. The internal stress caused by the ellipticity avoids cracks in the process of pipeline welding or after welding, which affects the integrity of the weld and the service life of the pipeline. Then, the aligned pipelines are moved close to each other, and the welding robot 4 is used to weld the pipeline ports, so that the welding between the two groups of pipelines is completed.

[0035] Thus, by opposing the longest diameter and the shortest diameter of the cross section at the two groups of pipeline ports of the centering assembly, the centers of the two ellipses are concentrically aligned, which not only enables the thick edge and the thin edge of the pipeline to correspond to each other during welding, thereby increasing the effective welding thickness during welding of the pipeline, avoiding stress concentration in the local area of the pipeline, causing cracks during welding or after welding, affecting the integrity of the weld and the service life of the pipeline, and avoiding excessive amount of wrong edge to cause defects such as incomplete fusion and slag inclusion in the weld, so as to improve the welding quality of the pipeline.

[0036] Further, the centering assembly comprises two groups of fixed shaft supports 5 installed on the top surface of the base 1, a fixed rotating shaft 6 fixedly installed between the two groups of fixed shaft supports 5, two groups of sliding supports 7 rotatably installed on the outer wall of the fixed rotating shaft 6, and the sliding supports 7 can slide along the outer wall of the fixed rotating shaft 6, a rotating rod 12 rotatably installed in each of the two groups of sliding supports 7, a rotating sleeve 25 commonly sleeved on the outer wall of the two groups of rotating rods 12 through a flat key, and a spring arranged between the two groups of rotating rods 12, and a centering assembly for positioning the center of the pipe opening arranged at the end of the two groups of rotating rods 12 away from each other.

[0037] According to the above embodiment, a specific embodiment of the centering assembly is provided, and specific reference is made to Figure 3 When the two groups of pipelines are respectively installed in the two groups of mounting supports 2, the rotation restriction on the pipelines is released, and after the centering assembly and the pipelines are in the same straight line by rotating the two groups of sliding supports 7 through an external driving assembly (such as a motor), the two groups of sliding supports 7 are respectively slid into the pipeline ports by a cylinder or other driving assembly, at this time, the centering assembly automatically identifies the longest diameter and the shortest diameter of the cross section at the port of the pipeline, when the centering assembly at one side of the pipeline port completes the centering of the cross section of the pipeline, since the projection of the longest diameter of the pipeline ports on the same vertical plane is not collinear, at this time, the centering assembly on this side rotates the rotating rod 12 on the same side together when identifying the longest diameter of the cross section, and simultaneously rotates the centering assembly on the other side, when the centering assembly on the other side starts to center, since the rotating rod 12 on this side cannot rotate, it will drive the pipeline on this side to rotate along the mounting support 2, at this time, the projections of the long sides identified by the two centering assemblies on the same vertical plane are in the collinear state, so that the centers of the cross sections of the pipeline ports on the two sides are concentrically aligned, that is, the centering of the pipeline ports on the two sides is completed.

[0038] Thus, the longest diameter of one side of the pipeline port is confirmed by a set of centering assemblies, and the other side of the centering assembly is rotated by rotating the rotating rod 12, so that the other side of the centering assembly rotates the pipeline while centering the pipeline port on this side, until the projections of the longest diameter and the shortest diameter of the cross section of the pipeline port on the same vertical plane are in the collinear state (the longest diameter and the shortest diameter are perpendicular to each other), that is, the elliptical centers of the two sides of the pipeline port are on the same horizontal line, and the centering of the two sides of the pipeline port is completed.

[0039] Further, the centering assembly comprises a fixed block 20 fixedly installed on the side wall of the sliding frame 7, a rotating ring 17 rotatably installed outside the fixed block 20, a sliding cavity 19 formed in the rotating ring 17, a rotating rod 12 rotatably connected to the side wall of the sliding cavity 19 by penetrating into the rotating ring 17, a rotating block 18 fixedly installed on the outer wall of the rotating rod 12, at least one pair of collinear fixed sleeves 16 fixedly installed on the outer wall of the rotating ring 17, a sliding rod 11 slidably installed in the fixed sleeve 16, a sliding sleeve 15 fixedly installed at one end of the sliding rod 11 and capable of sliding along the outer wall of the rotating ring 17, a compression spring arranged between the inner wall of the sliding sleeve 15 and the outer wall of the rotating ring 17, a roller 14 fixedly installed at the end of the sliding sleeve 15 through an axle bracket, and a ratchet block arranged on the outer wall of the rotating block 18 and capable of driving the sliding rod 11.

[0040] According to the above embodiment, a specific embodiment of the centering assembly is provided, and specific reference is made to Figure 3 When one side of the centering assembly enters the pipeline port, the sliding rod 11 and the sliding sleeve 15 are subjected to centrifugal motion under the pushing of the compression spring, at this time, a plurality of rollers 14 are subjected to different pressures in the ellipse and start to rotate around the rotating rod 12 (preferably four groups perpendicular to each other in the present case), until the pressures acting on the opposite rollers 14 are consistent, that is, the distances from the contact points of the two opposite rollers 14 and the pipeline to the front of the rotating rod 12 are consistent, and under the action of the compression spring, the lengths of the two rollers 14, the rotating ring 17 and the fixed sleeve 16 are the longest (and collinear with the longest diameter of the cross section), and the lengths of the other two rollers 14, the rotating ring 17 and the fixed sleeve 16 are the shortest, so that the rotating rod 12 is at the focal point of the longest diameter and the shortest diameter, and the centering of the pipeline is completed.

[0041] Thus, the same centrifugal force is applied to the four groups of perpendicular rollers 14, so that the rollers 14 and the sliding sleeve 15 extend outward with the same force, and under the action of the compression spring, the plurality of rollers 14 are driven to rotate along the inner wall of the pipeline due to the different support forces of the inner wall of the pipeline on each group of rollers 14, until the 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 the pushing force acting on the opposite rollers 14 are balanced, and the rotating rod 12 is at the focal point between the longest diameter and the shortest diameter, and the centering of the cross section of the pipeline at this position is completed.

[0042] Further, the outer wall of the rotating rod 12 is rotationally installed with a sliding gear 22 which is installed on the inner wall of the sliding cavity 19 through a flat key and can be slidably adjusted, the side wall of the rotating block 18 is fixedly installed with a fixed bevel gear 23 which can be intermeshed with the sliding gear 22, the end of the fixed block 20 penetrating into the sliding cavity 19 is fixedly installed with a rotating gear 24 which can be intermeshed with the sliding gear 22, the sliding gear 22 is embedded with electromagnets on both sides, and the fixed bevel gear 23 and the rotating gear 24 are both embedded with magnets with opposite magnetic poles, the ratchet block of the outer wall of the rotating block 18 is embedded with a pressure sensor, and the pressure sensor and the electromagnets are connected through electrical signals.

[0043] According to the above-mentioned embodiment, a specific embodiment for repairing the ellipticity of the pipeline is provided, and specific reference is made to Figure 8 When the 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 the balanced position without rotation, at this time, the rotating rod 12 drives the rotating block 18 to rotate through the external driving structure, because at this time, the two groups of sliding rods 11 on the longest diameter are centrifugally separated from the rotating block 18 due to the action of the compression spring, and the two groups of sliding rods 11 on the shortest diameter still maintain contact with the rotating block 18 under the influence of the inner wall of the pipeline, so that the sliding rods 11 on the shortest diameter are centrifugally separated outward, the inner wall of the pipeline at this position is expanded outward by the rollers 14, and the pressure sensor detects that the pressure of the multiple groups of sliding rods 11 on the rotating block 18 is uneven, the sliding gear 22 is driven to engage with the rotating gear 24 through the electromagnet, at the same time, the inner wall of the pipeline at the longest diameter is inwards contracted under the tension at the shortest diameter, driving the sliding rods 11 and the sliding sleeve 15 at this position to move centripetally, until the four groups of sliding rods 11 maintain contact with the rotating block 18, when the pressure sensor detects that the pressure of the four groups of sliding rods 11 on the rotating block 18 is consistent, that is, the lengths of the four groups of rotating rods 12 are consistent, it indicates that the diameters of the four groups of rotating rods 12 and the two groups of rollers on the standard circular cross-section coincide with each other at this time, the sliding gear 22 is driven to slide through the electromagnet, and specific reference is made to Figure 4, the rotating ring 17, the rotating block 18 and the rotating rod 12 form an integral whole to rotate, driving the multiple groups of rollers 14 to start rotating at the arc of a standard circle to roll the inner wall of the pipeline for repair until the inner wall of the pipeline forms or approaches a standard circle, completing the repair of the inner wall of the pipeline. When the inner wall of the pipeline has a pit, the pressure sensor detects that the sliding rod 11 is out of contact with the rotating block 18 or the pressure is uneven under the action of the compression spring, the sliding gear 22 is driven to slide by the electromagnet to engage the rotating gear 24, and the inner wall of the pipeline is repositioned by rotating the rotating rod 12 and the rotating block 18, and after the positioning is completed, the rotating ring 17, the rotating block 18 and the rotating rod 12 form an integral whole to rotate to repair the inner wall of the pipeline until the repair of the inner wall of the pipeline is completed.

[0044] In this way, the rotating ring 17, the rotating block 18 and the rotating rod 12 form an integral whole to rotate when the extension amounts of the four groups of rotating rods 12 are consistent, rolling the inner wall of the pipeline for repair, and when the inner wall of the pipeline has a pit, the rotating ring 17, the rotating block 18 and the rotating rod 12 cooperate to re-center the inner wall of the pipeline for dynamic repair in real time, which can complete the repair of the pipeline even if the inner wall of the pipeline is complex and variable.

[0045] Further, the fixed ring 3 is fixedly installed on the top surface of the base 1, the side wall of the fixed ring 3 is provided with a side groove for the sliding frame 7 to rotate out, the other side of the fixed ring 3 is provided with a cutting groove for the welding robot 4 to access, the inner wall of the fixed ring 3 is installed with a sliding ring 8 capable of rotating and sliding along the inner wall of the fixed ring 3, the inner wall of the sliding ring 8 is provided with a gear ring 10, the side wall of the sliding frame 7 is rotatably installed with a fixed gear 13 which is in mesh with the gear ring 10, the outer wall of the rotating shaft is further fixedly installed with a coaxial gear 26 which is coaxial with the fixed gear 13, and the outer wall of the rotating rod 12 is fixedly installed with a transmission gear 21 which is in mesh with the coaxial gear 26.

[0046] According to the above embodiment, a specific embodiment for driving the rotating rod 12 to rotate is provided. When the 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 through the gear ring 10, and the fixed gear 13 drives the transmission gear 21 and the rotating rod 12 to rotate through the coaxial gear 26, completing the driving of the rotating rod 12.

[0047] Further, the inner wall of the sliding ring 8 is installed with multiple groups of elastic telescopic rods 9 corresponding to the fixed sleeve 16 one by one, and one end of the elastic telescopic rod 9 is installed with a roller 14.

[0048] Further, the rotating direction of the transmission gear 21 can be adjusted by the gear set to be the same as the rotating direction of the gear ring 10.

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

[0050] According to the above-mentioned embodiment, since the inner wall of the sliding ring 8 is provided with a plurality of elastic telescopic rods 9 corresponding to the fixed sleeve 16, and one end of the elastic telescopic rod 9 is provided with a roller 14, 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 thickness of the pipeline, so that the device can synchronously repair the inner and outer walls of the pipeline, that is, the device can repair pipelines with different thicknesses.

[0051] It is worth mentioning that when the pipeline has high toughness, the rotating direction of the transmission gear 21 can be adjusted by the gear set to be the same as the rotating direction of the tooth ring 10, so as to increase the repair speed of the device on the pipeline, and when the pipeline has low toughness, the rotating direction of the transmission gear 21 can be adjusted by the gear set to be opposite to the rotating direction of the tooth ring 10, so as to reduce the repair amount of the pipeline when the roller 14 rolls a circle, and avoid excessive extrusion force of the roller 14 on the pipeline, which may cause the pipeline to burst.

[0052] Further, the mounting bracket 2 can vertically slide to adjust the height of the pipeline.

[0053] According to the above-mentioned embodiment, since the mounting bracket 2 can vertically slide to adjust the height of the pipeline, the centering assembly can automatically adjust when centering the pipeline ports on both sides, so that the centers of the elliptical ports of the pipelines on both sides are in the same straight line.

[0054] Further, the side wall of the roller 14 is provided with an inclined surface which is high near the pipeline and low away from the pipeline.

[0055] According to the above-mentioned embodiment, by providing the side wall of the roller 14 with an inclined surface which is high near the pipeline and low away from the pipeline, the centering assembly can more easily break through the resistance of the compression spring and enter the pipeline port, and at the same time, the centering can be completed during the entering process.

[0056] The standard parts used in this embodiment can be directly purchased from the market, and the non-standard structural parts according to the description and drawings can also be directly processed according to the existing technical knowledge without any doubt, and the connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment adopt the conventional models in the existing technology, so the specific description is not made here.

[0057] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. Hydraulic engineering pipeline welding device comprising a base (1), characterized in that: The base (1) top surface sliding installation has two groups of mounting racks (2), two groups the mounting rack (2) are used for fixing pipe, and the pipe can rotate in the mounting rack (2), the mounting rack (2) top surface fixedly installed with welding robot (4);Further include the centring assembly, the centring assembly is used for making the center of two groups of pipes concentric alignment; The centring assembly includes two groups of fixed shaft frames (5) installed on the top surface of the base (1), two groups the fixed shaft frame (5) between fixedly installed with fixed rotating shaft (6), the fixed rotating shaft (6) outer wall rotatably mounted with two groups of sliding frames (7), and the sliding frame (7) can slide along the outer wall of the fixed rotating shaft (6), two groups the rotating rod (12) is rotatably mounted in the two groups of sliding frames (7), and the rotating sleeve (25) is commonly sleeved on the outer wall of the two groups of rotating rods (12) through the flat key, and the two groups of rotating rods (12) are provided with springs between them, and the two groups of rotating rods (12) are provided with centering assemblies for positioning the center of the pipe opening at the ends away from each other; The centering assembly includes a fixed block (20) fixedly installed on the side wall of the sliding frame (7), the fixed block (20) is rotatably mounted with a rotating ring (17), the rotating ring (17) is provided with a sliding cavity (19), the rotating rod (12) is rotatably connected to the side wall of the sliding cavity (19) by penetrating into the rotating ring (17), the rotating rod (12) is fixedly installed with a rotating block (18) on the outer wall, at least one pair of collinear fixed sleeve (16) is fixedly installed on the outer wall of the rotating ring (17), the sliding rod (11) is slidably installed in the fixed sleeve (16), one end of the sliding rod (11) is fixedly installed with a sliding sleeve (15) which can slide along the outer wall of the rotating ring (17), the pressure spring is arranged between the inner wall of the sliding sleeve (15) and the rotating ring (17), the roller (14) is fixedly installed on the end of the sliding sleeve (15) through the shaft frame, and the rotating block (18) is provided with a ratchet block which can drive the sliding rod (11) on the outer wall.

2. The hydraulic pipe welding apparatus of claim 1, wherein: The rotating rod (12) is rotatably mounted with a sliding gear (22) which is installed on the inner side wall of the sliding cavity (19) and can be adjusted by sliding, the fixed inclined tooth (23) is fixedly installed on the side wall of the rotating block (18) and can be engaged with the sliding gear (22), the rotating gear (24) is fixedly installed on one end of the fixed block (20) penetrating into the sliding cavity (19) and can be engaged with the sliding gear (22), the electromagnet is embedded on both sides of the sliding gear (22), and the magnets with opposite magnetic poles are embedded in the fixed inclined tooth (23) and the rotating gear (24), the pressure sensor is embedded in the ratchet block on the outer wall of the rotating block (18), and the pressure sensor and the electromagnet are connected through electrical signal.

3. The hydraulic pipe welding apparatus of claim 2, wherein: The base (1) top surface is fixedly provided with a fixed ring (3), the fixed ring (3) side wall is provided with a side groove which can be turned out by a sliding frame (7), the fixed ring (3) another side is provided with a cutting groove which can be accessed by a welding robot (4), the fixed ring (3) inner wall is provided with a sliding ring (8) which can be rotated and slid along the fixed ring (3) inner wall, the sliding ring (8) inner wall is provided with a gear ring (10), the sliding frame (7) side wall is rotatably provided with a fixed gear (13) which is meshed with the gear ring (10) through a rotating shaft, the rotating shaft outer wall is further fixedly provided with a coaxial gear (26) which is coaxial with the fixed gear (13), the rotating rod (12) outer wall is fixedly provided with a transmission gear (21) which is meshed with the coaxial gear (26).

4. The hydraulic pipe welding apparatus of claim 3, wherein: The sliding ring (8) inner wall is provided with a plurality of elastic telescopic rods (9) which are one-to-one corresponding to the fixed sleeve (16), one end of the elastic telescopic rod (9) is provided with a roller (14).

5. Hydraulic engineering pipe welding device according to any of claims 1 to 4, characterized in that The mounting frame (2) can be vertically slidably adjusted in height.

6. The hydraulic pipe welding apparatus of claim 3, wherein: The rotating direction of the transmission gear (21) can be adjusted to be the same as the rotating direction of the gear ring (10) through a gear set.

7. The hydraulic pipe welding apparatus of claim 6, wherein: The transmission ratio between the coaxial gear (26) and the transmission gear (21) can be adjusted according to the pipe thickness.

8. The hydraulic pipe welding apparatus of claim 1, wherein: The roller (14) side wall is provided with an inclined surface which is high near the pipe and low away from the pipe.

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