A power tower reinforcement welding system for use in cryogenic environments

Abstract

The application discloses a power iron tower reinforcing welding system in a low-temperature environment, relates to the welding technical field, and can solve the problem that there is no heat preservation support for power iron tower welding in a low-temperature environment. The power iron tower reinforcing welding system in the low-temperature environment comprises a welding mechanism and a strip feeding mechanism. The welding mechanism comprises a buckling state and an opening state, and comprises coaxial rotating sleeves, two heating sleeves and two fixing sleeves. The rotating sleeves are located between the two heating sleeves, and the two fixing sleeves are located on the two sides of the two heating sleeves. The two ends of the rotating sleeves are buckled on the end portions of the two heating sleeves and are rotationally connected with the two heating sleeves. An observation window is arranged on the rotating sleeve or the rotating sleeve is made of transparent material. The welding mechanism comprises two groups of strip clamping assemblies which are arranged on the two sides of the rotating sleeve and are movably connected with the rotating sleeve. The strip clamping assembly comprises a strip clamping pipe body and a strip clamping unit. The strip feeding mechanism comprises a flexible strip feeding pipe.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically to a welding system for reinforcing power transmission towers in low-temperature environments. Background Technology

[0002] Power transmission towers are the core supporting structure of power transmission lines, and their safe operation is directly related to the stability of the power grid. With the increasing service life of in-service power transmission towers, the upgrading of design standards, and the frequent occurrence of extreme weather, many power transmission towers are facing insufficient load-bearing capacity and urgently need reinforcement and upgrading. The key areas for power transmission tower reinforcement are mainly concentrated in complex stress locations such as tower foot nodes, main material joint areas, and diagonal member connection nodes. The reliability of connections in these areas is crucial to the overall safety of the power transmission tower.

[0003] Currently, the main methods for reinforcing power transmission towers are bolted connections and welded connections. Bolted connections are convenient for on-site construction, while welding can form a strong metallurgical bond, requires no drilling, transmits force directly, and has strong overall integrity, making it an important means of reinforcing power transmission towers.

[0004] However, power transmission lines are widely distributed in high-altitude and cold regions such as Northeast China, Northwest China, and the Qinghai-Tibet Plateau. These regions experience long, harsh winters, with extreme temperatures reaching below -40°C. Furthermore, the large diurnal temperature range in high-altitude areas necessitates greater reinforcement, especially given the risk of snow accumulation on towers during winter. However, welding reinforcement in low-temperature environments leads to excessively rapid weld cooling, easily causing defects such as cold cracking and embrittlement of the heat-affected zone, severely impacting the reinforcement quality. While welding insulation devices exist for low-temperature environments, these devices are primarily designed for general steel structures in factories and cannot provide the necessary insulation and slow cooling functionality for welding reinforcement of power transmission towers in the field at low temperatures.

[0005] Based on the above background, the inventors designed a welding system for reinforcing power transmission towers in low-temperature environments to solve the aforementioned problems, and thus, this application is hereby filed. Summary of the Invention

[0006] The purpose of this application is to provide a welding system for reinforcing power towers in low-temperature environments, which solves the problem that existing technologies do not provide functional support for heat preservation and slow cooling in the field for welding reinforcement of power towers in low-temperature environments.

[0007] This application provides a welding system for reinforcing power towers in low-temperature environments, including a welding mechanism for fastening and fixing the weld seam of the power tower and covering it, and a bar feeding mechanism. The welding mechanism includes a fastened state and an open state. The welding mechanism includes a coaxial rotating assembly, two heating assemblies, and two fixing assemblies in the welding state. The rotating assembly is located between the two heating assemblies, and the two fixing assemblies are located on both sides of the two heating assemblies. The two ends of the rotating assembly are respectively fastened to the ends of the two heating assemblies and rotatably connected thereto. The rotating assembly is provided with an observation window or is made of transparent material. The welding mechanism also includes two sets of clamping bar assemblies respectively disposed on both sides of the rotating kit and movably connected thereto. The clamping bar assembly includes a clamping bar tube body with a clamping bar channel and a clamping bar unit with the clamping end located in the clamping bar channel. The feeding mechanism includes a flexible feeding tube for cooperating with the clamping assembly and feeding the flexible welding electrode into the clamping channel.

[0008] Optionally, the clamping strip assembly further includes a clamping strip seat disposed at the end of the clamping strip tube, wherein the clamping strip seat is provided with an installation cavity communicating with the clamping strip channel; The clamping bar unit is disposed in the mounting cavity, and the clamping end of the clamping bar unit extends into the clamping bar channel; The clamping strip assembly also includes a return spring fitted on the clamping strip tube, a lifting handle connected to the clamping strip tube, and a placement bracket set on the outer peripheral wall of the rotating kit. One end of the return spring presses against the clamping strip seat, and the other end presses against the inner peripheral wall of the rotating kit.

[0009] Optionally, the clamping tube body is further provided with a limiting protrusion for restricting the flexible feeding tube from continuing to extend; The top of the clamping strip tube is provided with a flared structure, and at least two extension rods are provided on the flared structure. The two ends of the lifting handle are rotatably connected to the two extension rods. The clamping strip tube can be placed on the placement frame through the extension rods provided on the flared structure.

[0010] Optionally, the clamping bar unit includes a clamping bar pressure block, an anti-disengagement cylinder, a mounting post, and a top pressure spring; The clamping bar pressure block and the anti-disengagement cylinder are fixedly connected. The mounting column is fixedly set on the inner wall of the mounting cavity, and the central axis of the mounting column is perpendicular to the central axis of the clamping bar channel. The anti-disengagement cylinder is fastened to the mounting column and slidably connected to it. The top pressure spring is sleeved on the anti-disengagement cylinder and the mounting column. One end of the top pressure spring presses against the inner wall of the mounting cavity, and the other end presses against the clamping bar pressure block. The upper part of the clamping block extending into one end of the clamping channel is arc-shaped.

[0011] Optionally, the welding mechanism further includes a locking assembly for locking the rotating assembly, the heating assembly, and the fixing assembly, and the open and closed states of the welding mechanism are switched by the locking assembly; The rotating assembly includes two hinged rotating semi-rings, and a locking component is provided at the end of the two rotating semi-rings away from the hinge axis; The heating kit includes two hinged heating semi-rings; The fixing kit includes two hinged fixing half-rings, and a locking component is provided at the end of the two fixing half-rings away from the hinge axis; The locking assembly includes two locking plates and a locking element that passes through the two locking plates.

[0012] Optionally, the welding mechanism further includes two sets of sliding block assemblies. Each sliding block assembly includes two sliding block semi-rings that are detachably and fixedly connected to the two heating semi-rings respectively. The two sliding block semi-rings can switch between an open state and a latching state with the two heating semi-rings. The two sliding block semi-rings are circular in shape when they are latched. The slide block semi-ring is provided with a sliding groove; The two end faces of the rotating semi-ring are provided with rotating buckle plates located in and slidably connected to the sliding buckle groove.

[0013] Optionally, a heating structure is provided on the inner peripheral wall of the heating semi-ring; A semi-annular connecting plate is provided on the end face of the heated semi-annular body near the rotating semi-annular body. The semi-annular connecting plate is disposed in the sliding groove and is detachably fixed to it by bolts.

[0014] Optionally, the locking plate is provided with oval or elliptical locking holes; The locking component includes an integrally fixedly connected cylinder and two clamping plates, as well as a hand-tightening structure set on the clamping plates. The two clamping plates are respectively set at both ends of the cylinder, and the shape of the clamping plates is the same as the shape of the locking hole.

[0015] Optionally, the fixing kit further includes at least three hand-tightening bolts, which are screwed onto the fixing half-ring and arranged radially along the fixing half-ring.

[0016] Optionally, a locking assembly is provided at the end of each of the two heating half-rings of the heating kit away from the hinge axis; The welding mechanism also includes two sets of flexible insulation cylinders, which are respectively disposed between the two sets of fixed components and the heating components; One end of the flexible insulation cylinder is sealed and fixedly connected to the two fixed semi-rings of the fixing kit, and the other end is sealed and fixedly connected to the two heating semi-rings of the heating kit. The flexible insulation cylinder is also provided with a connecting zipper that runs through the flexible insulation cylinder. The flexible insulation cylinder can switch between closed and open states through the connecting zipper. The orientation of the connecting zipper is the same as the free opening and closing end of the fixed half ring and the heating half ring near the locking component.

[0017] The beneficial effects of this application are: I. By setting up coaxial rotating components, heating components, and fixing components, this application can achieve rapid adaptive circumferential clamping of the welding mechanism onto the power tower members. It can also create a local spatial environment in low-temperature conditions, so that the temperature of the space around the weld can be controlled by the heating components during welding, thus avoiding cold cracking of the reinforced weld after welding.

[0018] Second, the welding mechanism of this application has an open and closed state and a locked state, both of which are locked by locking components. During the fixing process of the welding mechanism, it is possible to switch between the open and locked states without complicated tools. This design greatly simplifies the operation difficulty for workers wearing heavy cold-weather clothing in low-temperature environments and shortens the non-welding operation time.

[0019] Third, the welding mechanism of this application is designed with a clamping assembly that is compatible with the flexible feeding tube of the feeding mechanism. This split design concept allows the flexible feeding tube of the feeding mechanism to be directly pulled out from the clamping assembly after the reinforcement welding is completed, so that the welding mechanism is still fixed on the power tower pole for heat preservation until the reinforced weld has completely cooled down before the welding mechanism is removed. This allows one feeding mechanism to cooperate with two or more welding mechanisms, improving the welding efficiency of the welders. Attached Figure Description

[0020] Figure 1 This is a top view of Embodiment 1 of this application.

[0021] Figure 2 This is a top view of the welding insulation mechanism in Embodiment 1 of this application.

[0022] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of AA.

[0023] Figure 4 This is a schematic diagram of the structure of the fixing kit in the open state in Embodiment 1 of this application.

[0024] Figure 5 This is a schematic diagram of the internal structure of the welding insulation mechanism in Embodiment 1 of this application.

[0025] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0026] Figure 7 This is a cross-sectional view of the clip assembly in Embodiment 1 of this application.

[0027] Figure 8 for Figure 7 A magnified schematic diagram of the structure at point C.

[0028] Figure 9 This is a schematic diagram of the structure of Embodiment 2 of this application.

[0029] Explanation of reference numerals in the attached figures: 1-Strip feeding mechanism, 11-Flexible strip feeding tube, 2-Rotating assembly, 21-Rotating semi-ring, 211-Rotating buckle plate, 212-Welding hole, 22-Rotating handle, 3-Strip clamping assembly, 31-Strip clamping tube body, 311-Strip clamping channel, 312-Flare structure, 313-Limiting protrusion, 314-Extension rod, 32-Reset spring, 33-Strip clamping seat, 331-Mounting cavity, 34-Strip clamping unit, 341-Strip clamping block, 342-Top pressure spring, 343-Mounting post, 34 4-Anti-detachment cylinder, 35-Lifting handle, 36-Placement rack, 4-Heating kit, 41-Heating semi-ring, 411-Semi-ring connecting plate, 42-Heating structure, 5-Fixing kit, 51-Fixing semi-ring, 52-Hand-tightening bolt, 6-Locking assembly, 61-Locking plate, 611-Locking hole, 62-Locking piece, 621-Cylinder, 622-Snapping plate, 623-Hand-tightening structure, 71-Sliding semi-ring, 711-Sliding buckle groove, 8-Flexible insulation cylinder, 81-Connecting zipper. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0031] Example 1: like Figures 1 to 8 As shown, this embodiment provides a welding system for reinforcing power towers in low-temperature environments, including a welding mechanism for fastening and fixing the weld seam of the power tower and covering it, and a bar feeding mechanism 1; The welding mechanism includes a fastened state and an open state. The welding mechanism includes a coaxial rotating component 2, two heating components 4, and two fixing components 5 in the welding state. The rotating component 2 is located between the two heating components 4, and the two fixing components 5 are located on both sides of the two heating components 4, respectively. The two ends of the rotating assembly 2 are respectively fastened to the ends of the two heating assemblies 4 and rotated to connect with them. The rotating assembly 2 is provided with an observation window or is made of transparent material. The welding mechanism also includes two sets of clamping strip assemblies 3 respectively disposed on both sides of the rotating kit 2 and movably connected thereto. The clamping strip assembly 3 includes a clamping strip tube body 31 with a clamping strip channel 311, and a clamping strip unit 34 with the clamping end located in the clamping strip channel 311. The feeding mechanism 1 includes a flexible feeding tube 11 for cooperating with the clamping assembly 3 and feeding the flexible welding rod into the clamping channel 311. In this embodiment, the feeding mechanism 1 is the existing handheld flexible welding rod feeding mechanism 1, which will not be described in detail here.

[0032] This embodiment, by setting up a coaxial rotating assembly 2, heating assembly 4, and fixing assembly 5, can achieve rapid adaptive encirclement and locking of the welding mechanism onto the power tower pole, forming a localized spatial environment in the field. Specifically, the welding mechanism can be fixed to the power tower pole by the fixing assembly 5, the rotating assembly 2 can rotate between the heating assembly 4, and the rotating assembly 2 is provided with an observation window or is made of transparent material. The rotating assembly 2 is also provided with a clamping strip assembly 3, so that the welding operator can drive the rotating assembly 2 until the clamping strip channel 311 of the clamping strip assembly 3 is rotated to the position that needs to be reinforced for welding. The clamping strip assembly 3 can cooperate with the flexible feeding tube 11 of the feeding mechanism 1 to feed the flexible welding rod into the rotating assembly 2, which can then be placed against the position that needs to be reinforced for welding.

[0033] Therefore, through the above structural design, this embodiment can achieve rapid adaptive circumferential clamping of the welding mechanism onto the power tower members. It can also create a local spatial environment in a low-temperature environment, so that the temperature of the space around the weld can be controlled by the heating kit 4 during welding, thus avoiding cold cracks in the reinforced weld after welding.

[0034] Furthermore, the welding mechanism in this embodiment has an open and closed state and a locked state, both of which are locked by the locking component 6. During the fixing process of the welding mechanism, it is possible to switch between the open and locked states without complicated tools. This design greatly simplifies the operation difficulty for workers wearing heavy cold-weather clothing in low-temperature environments and shortens the non-welding operation time.

[0035] The welding mechanism in this embodiment is also designed with a clamping assembly 3 that is adapted to the flexible feeding tube 11 of the feeding mechanism 1. This split design concept allows the flexible feeding tube 11 of the feeding mechanism 1 to be directly pulled out from the clamping assembly 3 after the reinforcement welding is completed. This allows the welding mechanism to remain fixed on the power tower pole for heat preservation until the reinforced weld has completely cooled down before the welding mechanism is removed. This allows one feeding mechanism 1 to cooperate with two or more welding mechanisms, improving the welding efficiency of the welders.

[0036] In this embodiment, the clamping strip assembly 3 further includes a clamping strip seat 33 disposed at the end of the clamping strip tube 31, and the clamping strip seat 33 is provided with an installation cavity 331 communicating with the clamping strip channel 311; The clamping unit 34 is disposed in the mounting cavity 331, and the clamping end of the clamping unit 34 extends into the clamping channel 311; The clamping strip assembly 3 also includes a return spring 32 fitted on the clamping strip tube 31, a lifting handle 35 connected to the clamping strip tube 31, and a placement bracket 36 set on the outer peripheral wall of the rotating kit 2. One end of the return spring 32 presses against the clamping strip seat 33, and the other end presses against the inner peripheral wall of the rotating kit 2.

[0037] In this embodiment, the technical objective is to reinforce the weld seams of power transmission towers. Since the weld seams of power transmission tower members are typically distributed circumferentially along the member, such as in circular members or angle steel members, and the same weld seam requiring reinforcement may often have multiple locations requiring reinforcement, this embodiment, by setting up a clamping unit 34, a return spring 32, and a lifting handle 35, eliminates the need to pull out the flexible feeding tube 11 of the feeding mechanism 1 for repositioning. Instead, after shutting off the feeding drive force of the feeding mechanism 1, the flexible welding rod is directly pulled upwards a certain distance using the lifting handle 35, and then the rotating assembly 2 is directly driven to rotate and reposition. The rotating assembly 2 rotates to the position requiring reinforcement welding. After placement, release the lifting handle 35. Under the action of the return spring 32, the flexible welding rod can be driven to the welding position. At this time, the feeding mechanism 1 is started to feed the flexible welding rod and perform the welding action. Therefore, by setting the clamping unit 34, this application can make it possible to reinforce the same annular weld seam of the power tower pole without frequently pulling out the flexible feeding tube 11 of the feeding mechanism 1. Instead, the welding end of the flexible welding rod is kept in the rotating kit 2. This can avoid the flexible welding rod being repeatedly pulled out and inserted into the clamping assembly 3. At the same time, the high temperature after the flexible welding rod is welded can also heat the local space in the welding mechanism, avoiding cold cracks caused by the rapid cooling of the heated weld seam.

[0038] In this embodiment, the end of the fixing kit 5 is provided with several windproof strips (not shown in the figure) to block the large amount of heat exchange between the external cold air and the air in the welding mechanism. In some embodiments, a windproof plate can also be provided at the end of the fixing kit 5. It is not necessary to completely isolate the heat exchange between the air in the welding mechanism and the external cold air. It is only necessary to block most of the gaps. The specific shape can be set by the technician as needed, which will not be described in detail here.

[0039] In this embodiment, the clamping tube body 31 is also provided with a limiting protrusion 313 for limiting the flexible feeding tube 11 from continuing to extend. By setting the limiting protrusion 313, the insertion depth of the flexible feeding tube 11 can be physically limited to prevent the feeding tube from extending too far and causing interference or damage to the electric arc. The top of the clamping tube 31 is provided with a flared structure 312, and at least two extension rods 314 are provided on the flared structure 312. The two ends of the lifting handle 35 are rotatably connected to the two extension rods 314. The clamping tube 31 can be placed on the placement frame 36 through the extension rods 314 provided on the flared structure 312.

[0040] In this embodiment, the flared structure 312 facilitates the introduction of the flexible electrode feeding tube 11; the extension rod 314 serves as a support arm, working in conjunction with the placement frame 36, so that after one of the reinforcement weldings is completed, the flexible electrode can be lifted upwards using the lifting handle 35, thus moving it away from the weld seam and keeping it within the rotating assembly 2. At this point, a certain angle is rotated so that the extension rod 314 is placed on the placement frame 36, thus keeping the flexible electrode away from the weld seam and within the rotating assembly 2. At this point, the welder directly drives the rotating assembly 2 to rotate and position it until the flexible electrode is directly above the position to be reinforced. Then, the extension rod 314 is removed from the placement frame 36, and under the action of the return spring 32, the welding end of the flexible electrode is brought close to or abutted against the weld seam again for reinforcement welding.

[0041] In this embodiment, the clamping bar unit 34 includes a clamping bar pressure block 341, an anti-disengagement cylinder 344, a mounting post 343, and a top pressure spring 342; The clamping block 341 and the anti-disengagement cylinder 344 are fixedly connected. The mounting post 343 is fixedly set on the inner wall of the mounting cavity 331, and the central axis of the mounting post 343 is perpendicular to the central axis of the clamping channel 311. The anti-disengagement cylinder 344 is fastened to the mounting post 343 and slidably connected to it. The top pressure spring 342 is sleeved on the anti-disengagement cylinder 344 and the mounting post 343. One end of the top pressure spring 342 presses against the inner wall of the mounting cavity 331, and the other end presses against the clamping block 341. The upper part of the clamping bar pressure block 341 extending into one end of the clamping bar channel 311 is arc-shaped, which facilitates the downward introduction of the flexible welding rod onto the welding seam.

[0042] In this embodiment, the top pressure spring 342 is provided so that after the flexible welding rod is inserted into the clamping channel 311, the clamping block 341 can continuously press against the flexible welding rod. This allows the driving force of the feeding mechanism 1 to overcome the friction of the clamping block 341 during the welding process, thus completing the welding. When the welding position needs to be repositioned and reinforced after the welding is completed, the friction of the clamping block 341 can drive the flexible welding rod away from the weld seam after the feeding mechanism 1 loses its driving force, thus preventing the flexible welding rod from continuously pressing against the weld seam.

[0043] In this embodiment, the welding mechanism further includes a locking component 6 for locking the rotating assembly 2, the heating assembly 4, and the fixing assembly 5. The open state and the locked state of the welding mechanism are switched by the locking component 6. The rotating assembly 2 includes two hinged rotating semi-rings 21, and a locking component 6 is provided at one end of the two rotating semi-rings 21 away from the hinge axis; The heating kit 4 includes two hinged heating semi-rings 41; The fixing kit 5 includes two hinged fixing semi-rings 51, and a locking component 6 is provided at one end of the two fixing semi-rings 51 away from the hinge axis. The locking assembly 6 includes two locking plates 61 and a locking member 62 that passes through the two locking plates 61.

[0044] In this embodiment, the rotating kit 2, the heating kit 4, and the fixing kit 5 are all made of two semi-rings hinged together, which makes it easy for the entire welding mechanism to be fastened to the power tower pole. Then, the entire welding mechanism can be fixed to the power tower pole by using the hand-tightening bolts 52 on the fixing kit 5.

[0045] In this embodiment, a rotating handle 22 is provided at the hinge position of the two rotating semi-rings 21 of the rotating kit 2, so that the operator can drive the entire rotating kit 2 to rotate.

[0046] In this embodiment, the welding mechanism further includes two sets of sliding block assemblies. The sliding block assembly includes two sliding block semi-ring bodies 71 that are detachably and fixedly connected to the two heating semi-ring bodies 41 respectively. The two sliding block semi-ring bodies 71 can switch between open and closed states with the two heating semi-ring bodies 41. The shape of the two sliding block semi-ring bodies 71 in the closed state is circular. The sliding half-ring 71 is provided with a sliding groove 711; The two end faces of the rotating semi-ring 21 are provided with rotating buckle plates 211 located in and slidably connected to the sliding buckle groove 711.

[0047] In this embodiment, by setting a sliding half-ring 71 and providing a sliding buckle groove 711 on the sliding half-ring 71, the rotating half-ring 21 can be fastened to the sliding half-ring 71 and rotate freely, thereby facilitating the operator's positioning. Since the rotating half-ring 21 is fastened in the sliding buckle groove 711 by a rotating buckle plate 211, after the reinforcement welding of the weld seam of the power tower member is completed, the rotating kit 2 needs to be rotated to the initial position to enter the fastening state. In some embodiments, initial position marks can be set on the heating kit 4 and the rotating kit 2 to facilitate the operation of the welding personnel.

[0048] In this embodiment, the rotating semi-ring 21 is also provided with welding holes 212 for installing the clamping strip assembly 3.

[0049] In this embodiment, a heating structure 42 is provided on the inner peripheral wall of the heating semi-ring 41. The heating structure 42 in this embodiment can be a resistance wire or other types of heating elements, which will not be described in detail here. When using resistance wire heating, a battery or a power connector can be set inside the heating semi-ring 41. Welding personnel can carry the power supply with them. Technicians can choose the built-in technical route or the external power supply technical route according to their needs, which will not be described in detail here. A semi-annular connecting plate 411 is provided on one end face of the heating semi-annular body 41 near the rotating semi-annular body 21. The semi-annular connecting plate 411 is disposed in the sliding buckle groove 711 and is detachably fixed to it by bolts. In some embodiments, the heating semi-annular body 41 and the sliding semi-annular body 71 can also be directly manufactured by an integrated process, which will not be elaborated here.

[0050] In this embodiment, the locking plate 61 is provided with an oval or elliptical locking hole 611; The locking member 62 includes an integrally fixedly connected cylinder 621 and two clamping plates 622, as well as a hand-tightening structure 623 disposed on the clamping plates 622. The two clamping plates 622 are respectively disposed at both ends of the cylinder 621. The shape of the clamping plates 622 is the same as the shape of the locking hole 611, and the cylinder 621 is between the two clamping plates 622, so that the locking member 62 rotates along its own axis, thereby making the clamping plates 622 completely located in the locking hole 611, and the two locking plates 61 that are pressed and fixed by the two clamping plates 622 can be freely separated.

[0051] In this embodiment, the fixing kit 5 further includes at least three hand-tightening bolts 52, which are spirally connected to the fixing semi-ring 51 and are arranged radially along the fixing semi-ring 51.

[0052] In this embodiment, three or more hand-tightened bolts 52 are provided to facilitate the welding mechanism of this embodiment to be applicable to power tower poles of different shapes.

[0053] Example 2: like Figure 9 As shown, based on the above embodiment 1, in this embodiment, the two heating half-rings 41 of the heating kit 4 are provided with a locking component 6 at the end away from the hinge axis; The welding mechanism also includes two sets of flexible insulation cylinders 8, which are respectively disposed between two sets of fixing kits 5 and heating kits 4. One end of the flexible heat-insulating cylinder 8 is sealed and fixedly connected to the two fixed semi-rings 51 of the fixing kit 5, and the other end is sealed and fixedly connected to the two heating semi-rings 41 of the heating kit 4. The flexible insulation cylinder 8 is also provided with a connecting zipper 81 that runs through the flexible insulation cylinder 8. The flexible insulation cylinder 8 can switch between closed and open states through the connecting zipper 81. The orientation of the connecting zipper 81 is the same as the free opening and closing end of the fixed semi-ring 51 and the heating semi-ring 41 near the locking component 6.

[0054] In this embodiment, by setting a flexible insulation cylinder 8 between the fixed kit 5 and the heating kit 4, and by connecting the flexible insulation cylinder 8 to switch between closed and open states via a zipper 81, the rotating kit 2 in this embodiment can not only achieve circumferential rotation but also axial movement. This allows the clamping strip assembly 3 on the rotating kit 2 to be adjusted in both circumferential and axial directions, ensuring that the clamping strip assembly 3 can be precisely moved directly above the position where reinforcement welding is required. At the same time, due to the setting of the flexible insulation cylinder 8, a three-level temperature zone can be formed, namely the high-temperature zone where the rotating kit 2 is located, the medium-temperature insulation zone where the heating kit 4 is located, and the low-temperature insulation zone where the flexible insulation cylinder 8 is located. This can significantly reduce the cooling rate of the weld and prevent cold cracking.

[0055] The remaining structures in this embodiment are the same as those in Embodiment 1 above, and will not be described again here.

[0056] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A welding system for reinforcing power transmission towers in low-temperature environments, characterized in that, The welding mechanism includes a welding mechanism for fastening and fixing the weld seam of the power tower and covering it, and a bar feeding mechanism (1). The welding mechanism includes a snap-fit ​​state and an open state. The welding mechanism includes a coaxial rotating assembly (2), two heating assemblies (4) and two fixing assemblies (5) in the welding state. The rotating assembly (2) is located between the two heating assemblies (4), and the two fixing assemblies (5) are located on both sides of the two heating assemblies (4). The two ends of the rotating kit (2) are respectively fastened to the ends of the two heating kits (4) and rotated to connect with them. The rotating kit (2) is provided with an observation window or is made of transparent material. The welding mechanism also includes two sets of clamping strip assemblies (3) respectively disposed on both sides of the rotating kit (2) and movably connected thereto. The clamping strip assembly (3) includes a clamping strip tube body (31) with a clamping strip channel (311) and a clamping strip unit (34) with the clamping end located in the clamping strip channel (311). The feeding mechanism (1) includes a flexible feeding tube (11) for cooperating with the clamping assembly (3) and feeding the flexible welding rod into the clamping channel (311).

2. The welding system for reinforcing power transmission towers in low-temperature environments according to claim 1, characterized in that, The clamping strip assembly (3) further includes a clamping strip seat (33) disposed at the end of the clamping strip tube (31), and the clamping strip seat (33) is provided with an installation cavity (331) communicating with the clamping strip channel (311). The clamping bar unit (34) is disposed in the mounting cavity (331), and the clamping end of the clamping bar unit (34) extends into the clamping bar channel (311); The clamping strip assembly (3) also includes a return spring (32) fitted on the clamping strip tube body (31), a lifting handle (35) connected to the clamping strip tube body (31), and a placement bracket (36) set on the outer peripheral wall of the rotating kit (2). One end of the return spring (32) presses against the clamping strip seat body (33), and the other end presses against the inner peripheral wall of the rotating kit (2).

3. The welding system for reinforcing power towers in low-temperature environments according to claim 2, characterized in that, The clamping tube body (31) is also provided with a limiting protrusion (313) for restricting the flexible feeding tube (11) from continuing to extend. The top of the clamping tube (31) is provided with a flared structure (312), and at least two extension rods (314) are provided on the flared structure (312). The two ends of the lifting handle (35) are rotatably connected to the two extension rods (314). The clamping tube (31) can be placed on the placement rack (36) through the extension rods (314) provided on the flared structure (312).

4. The welding system for reinforcing power towers in low-temperature environments according to claim 2, characterized in that, The clamping unit (34) includes a clamping block (341), an anti-disengagement cylinder (344), a mounting post (343), and a top pressure spring (342). The clamping block (341) and the anti-disengagement cylinder (344) are fixedly connected. The mounting post (343) is fixedly set on the inner wall of the mounting cavity (331), and the central axis of the mounting post (343) is perpendicular to the central axis of the clamping channel (311). The anti-disengagement cylinder (344) is fastened to the mounting post (343) and slidably connected to it. The top pressure spring (342) is sleeved on the anti-disengagement cylinder (344) and the mounting post (343). One end of the top pressure spring (342) presses against the inner wall of the mounting cavity (331), and the other end presses against the clamping block (341). The upper part of the clamping block (341) extending into the clamping channel (311) is arc-shaped.

5. The welding system for reinforcing power towers in low-temperature environments according to claim 1, characterized in that, The welding mechanism also includes a locking assembly (6) for locking the rotating kit (2), the heating kit (4) and the fixing kit (5), and the welding mechanism is switched between open and closed states by the locking assembly (6); The rotating assembly (2) includes two hinged rotating semi-rings (21), and a locking assembly (6) is provided at the end of the two rotating semi-rings (21) away from the hinge axis. The heating kit (4) includes two hinged heating semi-rings (41). The fixing kit (5) includes two hinged fixing half-rings (51), and a locking assembly (6) is provided at the end of the two fixing half-rings (51) away from the hinge axis. The locking assembly (6) includes two locking plates (61) and a locking element (62) that passes through the two locking plates (61).

6. The welding system for reinforcing power towers in low-temperature environments according to claim 5, characterized in that, The welding mechanism also includes two sets of sliding block assemblies. The sliding block assembly includes two sliding block semi-ring bodies (71) that are detachably and fixedly connected to two heating semi-ring bodies (41). The two sliding block semi-ring bodies (71) can switch between open and closed states with the two heating semi-ring bodies (41). The two sliding block semi-ring bodies (71) are circular in shape when they are closed. The sliding half-ring (71) is provided with a sliding groove (711). The two end faces of the rotating semi-ring (21) are provided with rotating buckle plates (211) located in and slidably connected to the sliding buckle groove (711).

7. The welding system for reinforcing power towers in low-temperature environments according to claim 6, characterized in that, A heating structure (42) is provided on the inner peripheral wall of the heating semi-annulus (41). The heating semi-ring (41) is provided with a semi-annular connecting plate (411) on one end face near the rotating semi-ring (21). The semi-annular connecting plate (411) is located in the sliding buckle groove (711) and is detachably fixed to it by bolts.

8. A welding system for reinforcing power towers in low-temperature environments according to claim 5, characterized in that, The locking plate (61) is provided with an oval or elliptical locking hole (611). The locking component (62) includes an integrally fixedly connected cylinder (621) and two snap-fit ​​plates (622), as well as a hand-tightening structure (623) provided on the snap-fit ​​plates (622). The two snap-fit ​​plates (622) are respectively provided at both ends of the cylinder (621), and the shape of the snap-fit ​​plates (622) is the same as the shape of the locking hole (611).

9. A welding system for reinforcing power towers in low-temperature environments according to claim 5, characterized in that, The fixing kit (5) also includes at least three hand-tightening bolts (52), which are spirally connected to the fixing half-ring (51) and are arranged radially along the fixing half-ring (51).

10. A welding system for reinforcing power towers in low-temperature environments according to claim 5, characterized in that, The heating kit (4) has a locking assembly (6) at one end of each of the two heating half-rings (41) away from the hinge axis. The welding mechanism also includes two sets of flexible insulation cylinders (8), which are respectively disposed between two sets of fixed components (5) and heating components (4); One end of the flexible heat-insulating cylinder (8) is sealed and fixedly connected to the two fixed semi-rings (51) of the fixing kit (5), and the other end is sealed and fixedly connected to the two heating semi-rings (41) of the heating kit (4); The flexible insulation cylinder (8) is also provided with a connecting zipper (81) that runs through the flexible insulation cylinder (8). The flexible insulation cylinder (8) can switch between closed and open states through the connecting zipper (81). The orientation of the connecting zipper (81) is the same as the free opening and closing end of the fixed semi-ring (51) and the heating semi-ring (41) near the locking assembly (6).

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