Flexible suspension bridge suspender welding device

Abstract

The present application belongs to the technical field of boom welding, and particularly relates to a flexible suspension bridge boom welding device; the device comprises a rack, a control part, two clamping fixing parts, two welding execution parts and a plurality of supporting parts; through the "inner and outer double-layer triangular section superimposed welding" process, the two welding areas with triangular sections form a reinforcing structure which is nested and superimposed with each other, greatly increasing the effective weld depth and the bearing section area, and changing the connection area from "line" connection to "surface" connection; the triangular section has excellent structural stability, can more effectively disperse and transfer stress, and avoids the sharp concentration of stress at the weld root; the second area welding further melts the first area welding surface, the tie rod and the head plate into one whole, forms an interlocking structure, and significantly improves the fatigue resistance and static load strength of the joint position.

Description

Technical Field

[0001] This invention belongs to the field of suspension rod welding technology, and particularly relates to a welding device for suspension rods of flexible suspension bridges. Background Technology

[0002] As an important modern bridge type, flexible suspension bridges rely heavily on their suspenders, which are key load-bearing components. Their primary function is to connect the main cable to the bridge deck system and transfer the deck load to the main cable. The reliability of the suspenders directly affects the structural safety and service life of the entire bridge.

[0003] Currently, hanger rods are typically constructed by welding a tie rod and its end caps together. However, hanger rod welding is mostly done manually or semi-automatically. These methods often result in a single-layer annular weld. A single-layer annular weld has a small load-bearing area, leading to lower connection strength. Furthermore, during the welding process, insufficient or uneven flux filling can easily cause defects such as porosity, slag inclusions, incomplete fusion, and unevenness in the weld. Since the weld is a stress concentration point, these defects further reduce the effective load-bearing area, significantly impacting the hanger's mechanical properties.

[0004] In summary, existing technologies for welding hangers in flexible suspension bridges have significant shortcomings in terms of weld quality, defect control, and final connection reliability. Therefore, this invention provides a welding device for hangers in flexible suspension bridges. Summary of the Invention

[0005] To address the aforementioned problems, the present invention provides a flexible suspension bridge hanger welding device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solution: The present invention provides a flexible suspension bridge hanger welding device, including a frame, a control unit, two clamping and fixing units, two welding execution units, and several supporting units; the control unit is located on one side of the frame and has a display screen and operation buttons for inputting welding parameters, controlling the welding process, and realizing the operation and control of the entire welding device; the two clamping and fixing units are located on the left and right sides of the frame for clamping and fixing the end plate; the two welding execution units are respectively located on the left and right sides of the frame for welding and fixing the end plate and the tie rod; several supporting units are evenly arranged on the upper end face of the frame for supporting the tie rod and driving the tie rod to rotate at a uniform speed to switch the welding position.

[0007] The end plate and the tie rod form annular welding surfaces in the first and second regions with inner and outer double-layer triangular cross sections. The welding surface of the second region fuses the welding surface of the first region, the tie rod, and the end plate into a whole.

[0008] According to an advantageous embodiment, the welding actuator includes a welding assembly and a forming limiting assembly; both the welding assembly and the forming limiting assembly are disposed on the side wall of the frame, the welding assembly is used to weld the weld seam between the end plate and the tie rod by submerged arc welding; the forming limiting assembly is used to limit and compact the flux during the welding process.

[0009] According to an advantageous embodiment, the welding assembly includes a universal moving stage mounted on a frame and capable of sliding in any direction, and a welding head, a flux supply gun, and a flux recovery gun respectively mounted on the universal moving stage; the welding head feeds the welding wire into the arc zone at a stable speed; the flux supply gun spreads flux into the arc zone; and the flux recovery gun collects unmelted flux after welding.

[0010] According to an advantageous embodiment, the forming limiting assembly includes a transverse electric telescopic component disposed on the side wall of the frame and a longitudinal electric telescopic component connected to the telescopic end of the transverse electric telescopic component. The telescopic end of the longitudinal electric telescopic component is detachably mounted with a semi-arc-shaped limiting plate via a connecting block. The limiting plate has two sets of rectangular limiting grooves, one inside and one outside. A U-shaped limiting frame is disposed in one set of rectangular limiting grooves via electric sliders. The U-shaped limiting frame is horizontally positioned and can move up and down along the rectangular limiting grooves. A slider that can move up and down along the rectangular limiting grooves is disposed in one set of rectangular limiting grooves outside the limiting plate. A micro motor is disposed inside the slider, and the output shaft of the micro motor is connected to a surrounding plate for limiting the flux.

[0011] According to an advantageous embodiment, both strip segments of the U-shaped limiting frame are provided with through guide grooves, and a pressing member is provided inside the two guide grooves. Furthermore, an electric push rod is provided inside the U-shaped limiting frame to drive the pressing member to move horizontally along the guide grooves.

[0012] According to an advantageous embodiment, the pressing component includes a pressing handle and two semi-circular pressing heads. The pressing handle is slidably disposed in a guide groove, and one end of the pressing handle is connected to the telescopic end of an electric push rod. A semi-circular pressing head is fixedly installed at the other end of the pressing handle. A semi-circular pressing head is also disposed on the lower end face of the pressing handle via an electric slider.

[0013] According to an advantageous embodiment, the clamping and fixing part includes clamping plates, a limiting plate, and a reduction motor; the reduction motor is respectively mounted on the left and right ends of the frame via motor bases, and the output shaft of the reduction motor is connected to the limiting plate via a flange; the limiting plate is provided with clamping plates that can move closer or further away synchronously, and the clamping plates are symmetrically arranged about the center of the limiting plate; the limiting plate is also provided with a driving component inside for driving the two clamping plates to move closer or further away synchronously.

[0014] According to an advantageous embodiment, the support portion includes a support platform disposed at the upper end of the frame, and two synchronously rotating electrically driven rollers are disposed at the upper end of the support platform via a bracket. The electrically driven rollers are used to drive the tie rod placed at the upper end of the support platform to rotate at a low speed.

[0015] Compared with existing technologies, the flexible suspension bridge hanger welding device provided in this invention has the following beneficial effects: This invention utilizes a "double-layer triangular cross-section overlapping welding" process (the first region welds the root of the bevel, and the second region covers the outer side of the first region). The two triangular welding regions form a nested, superimposed reinforcing structure, greatly increasing the effective weld depth and load-bearing cross-sectional area, transforming the connection from a "line" connection to a "surface" connection. The triangular cross-section possesses excellent structural stability, effectively dispersing and transferring stress, avoiding the rapid concentration of stress at the weld root. Furthermore, the second region welding further fuses the first region welding surface, the tie rod, and the end plate into a single unit, forming an interlocking structure. This significantly improves the fatigue resistance and static load strength of the weld point between the tie rod and the end plate. The entire weld formation process is carried out gradually under flux protection during compaction treatment, resulting in a uniform weld surface free of bubbles, further ensuring the weld strength of the hanger. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the control unit and part of the frame of the present invention.

[0018] Figure 3 This is a partial structural diagram of the support portion and the tie rod of the present invention.

[0019] Figure 4 For the present invention Figure 3 A magnified view of section A in the image.

[0020] Figure 5 This is a cross-sectional view of the pressing component and the U-shaped limiting frame of the present invention.

[0021] Figure 6 This is a front view of the location for preparing the welding bevel between the end cap plate and the tie rod of the present invention.

[0022] Figure 7 This is a side view showing the location for preparing the welding bevel between the end cap plate and the tie rod of the present invention.

[0023] Figure 8 This is a front view of the completed welding of the bevel between the end cap plate and the tie rod of the present invention.

[0024] Figure 9This is a side view of the end cap plate and tie rod after the bevel welding is completed.

[0025] Figure 10 This is a front view of the end cap plate and tie rod before secondary reinforcement welding at the bevel position.

[0026] Figure 11 This is a side view of the end cap plate and tie rod before secondary reinforcement welding at the bevel position.

[0027] Figure 12 This is a side view of the initial welding during the secondary reinforcement of the bevel position between the end plate and the tie rod in this invention.

[0028] Figure 13 This is a front view of the secondary reinforcement welding process at the bevel position between the end cap plate and the tie rod in this invention.

[0029] Figure 14 This is a side view of the secondary reinforcement welding process at the bevel position between the end cap plate and the tie rod in this invention.

[0030] Figure 15 This is a front view of the completed welding of the bevel between the end cap plate and the tie rod of the present invention.

[0031] The attached figures are labeled as follows: 1. Frame; 2. Control unit; 21. Display screen; 22. Operation button; 3. Clamping and fixing unit; 31. Clamping plate; 32. Limiting plate; 33. Gear motor; 4. Welding execution unit; 41. Welding assembly; 411. Universal moving table; 412. Welding head; 413. Flux supply gun; 414. Flux recovery gun; 42. Forming limiting assembly; 421. Lateral electric telescopic component; 422. Longitudinal electric telescopic component; 423. Limiting plate; 424. U-shaped limiting frame; 425. Slider; 426. Micro motor; 427. Enclosure; 431. Guide groove; 432. Pressing component; 433. Electric push rod; 441. Pressing handle; 442. Semi-arc pressing head; 5. Support unit; 51. Support platform; 52. Electric drive roller; 6. End plate; 7. Tie rod. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1 -Appendix Figure 15 This application will now be described in further detail.

[0033] Please refer to the following: Figure 1 and Figure 2A flexible suspension bridge hanger welding device includes a frame 1, a control unit 2, a clamping and fixing unit 3, two welding execution units 4, and several support units 5. The control unit 2 is located on one side of the frame 1 and has a display screen 21 and operation buttons 22 for inputting welding parameters, controlling the welding process, and realizing the operation and control of the entire welding device. The clamping and fixing unit 3 is located on the left and right sides of the frame 1 for clamping and fixing the end plate 6. The two welding execution units 4 are respectively located on the left and right sides of the frame 1 for welding and fixing the end plate 6 and the tie rod 7. Several support units 5 are evenly arranged on the upper surface of the frame 1 for supporting the tie rod 7 and driving it to rotate at a uniform speed to switch the welding position.

[0034] The specific welding process is as follows: First, operate the control unit 2 and input relevant parameters through the operation button 22. Then, evenly adjust the position of several support parts 5 on the frame 1. Next, use one of the following equipment: crane, belt conveyor, forklift, etc., to lift the tie rod 7 to the upper end of the support part 5, and support the tie rod 7 through the support part 5. Then, clamp and fix the end plate 6 to be welded through the clamping and fixing part 3 and send it to fit and align with the end of the tie rod 7. It should be noted that the end of the tie rod 7 to be welded has a bevel at the end position to increase the connection strength between it and the end plate 6. After alignment, the welding execution unit 4 performs submerged arc welding on the two inner and outer annular areas between the tie rod 7 and the end plate 6. After welding is completed, the clamping and fixing part 3 releases the clamp on the end plate 6, and finally the welded tie rod is removed.

[0035] In this embodiment, the control unit 2 utilizes advanced sensing elements such as vision sensors and tactile sensors, and with the help of computer software systems, databases, expert systems, etc., it has functions such as recognition, judgment, real-time detection, calculation, automatic programming, and welding parameter calling. Operators only need to input information such as material grade and plate thickness, and the equipment can automatically plan the welding process.

[0036] See Figure 3 The supporting part 5 includes an adjustable supporting platform 51 mounted on the upper end of the frame 1. Two synchronously rotating electrically driven rollers 52 are mounted on the upper end of the supporting platform 51 via a bracket. The electrically driven rollers 52 drive the connecting rod 7 placed on their upper end to rotate at a low speed. During operation, since the connecting rod 7 is placed between the two electrically driven rollers 52, when the two electrically driven rollers 52 rotate synchronously, the connecting rod 7 can be driven to rotate at a low speed through the friction between the connecting rod 7 and the electrically driven rollers 52. Simultaneously, the specific position of the supporting platform 51 on the upper surface of the frame 1 in this embodiment can be automatically adjusted according to the input parameters. In this embodiment, the automatic adjustment of the supporting platform 51 is performed electrically.

[0037] It should be noted that the clamping and fixing part 3 is used to clamp and fix the end plate 6; and the clamping and fixing principles currently adopted by the clamping and fixing part 3 are mainly chuck type, clamp type, and clamp type; while the clamping and fixing part 3 in this embodiment adopts the clamp type, which clamps and fixes the end plate 6 by opening and closing the clamp, which can quickly position and fix the end plate 6, and is suitable for end plates 6 of various thicknesses. For details, please refer to Figure 1 The clamping and fixing part 3 includes a clamping plate 31, a limiting plate 32, and a reduction motor 33. The reduction motor 33 is respectively mounted on the left and right ends of the frame 1 via motor bases. The output shaft of the reduction motor 33 is connected to the limiting plate 32 via a flange. The limiting plate 32 is provided with clamping plates 31 that can move closer or further away synchronously. The clamping plates 31 are symmetrically arranged about the center of the limiting plate 32. The limiting plate 32 is also provided with a driving component for driving the two clamping plates 31 to move closer or further away synchronously. It should be noted that the specific driving component can be a cylinder, hydraulic cylinder, etc. In this embodiment, the driving component is a double-output head cylinder, wherein the two output heads of the double-output head cylinder are respectively connected to the clamping plate 31. During operation, the two output heads of the double-output head cylinder retract with each other, causing the two clamping plates 31 to move closer to each other to complete the clamping of the end plate 6. After clamping and fixing, it is also necessary to adjust the end plate 6 to fit with the end face of the tie rod 7. The specific adjustment action is achieved by adjusting the horizontal movement of the clamping and fixing part 3 through the telescopic system inside the frame 1 (common telescopic systems include hydraulic telescopic systems, pneumatic telescopic systems, and electric telescopic systems).

[0038] See Figure 1 The welding execution unit 4 includes a welding assembly 41 and a forming limiting assembly 42. Both the welding assembly 41 and the forming limiting assembly 42 are adjustablely mounted on the side wall of the frame 1. The welding assembly 41 is used to weld the weld seam between the end plate 6 and the tie rod 7 by submerged arc welding. The forming limiting assembly 42 is used to limit and compact the flux during the welding process.

[0039] When welding the boom using this welding device, the connection between the tie rod 7 and the end plate 6 is welded using a two-layer overlapping layout. This greatly increases the load-bearing area of ​​the weld, and the weld cross-sections of both layers are triangular, which aims to improve the structural strength of the boom. Specifically, the welding component 41 feeds the welding wire into the welding area and spreads the flux. The forming limiting component 42 restricts the area filled with flux during the welding process and compacts the flux filled in this area by the welding component 41. Finally, the welding component 41 ignites the flux, causing the welding wire to melt and achieve welding, and the excess unmelted flux is adsorbed and recycled.

[0040] See Figure 2 and Figure 4The welding assembly 41 includes a universal moving stage 411 mounted on the frame 1 and capable of sliding in any direction, and a welding head 412, a flux supply gun 413, and a flux recovery gun 414 respectively mounted on the universal moving stage 411. The welding head 412 feeds the welding wire into the arc zone (welding area) at a stable speed, ensuring a balance between the amount of welding wire melting and the amount of wire fed, maintaining a stable arc length, and can instantly apply a high-frequency high-voltage electric pulse between the welding wire and the workpiece to ignite the arc. The flux supply gun 413 evenly spreads flux into the arc zone, and excess unmelted flux after welding is collected by the flux recovery gun 414, and the collected flux can be reused.

[0041] See Figure 4 and Figure 6 The forming limiting component 42 includes a transverse electric telescopic component 421 disposed on the side wall of the frame 1 and a longitudinal electric telescopic component 422 connected to the telescopic end of the transverse electric telescopic component 421. The telescopic end of the longitudinal electric telescopic component 422 is detachably mounted with a semi-arc-shaped limiting plate 423 via a connecting block. The limiting plate 423 has two sets of rectangular limiting grooves, one inside and one outside. A U-shaped limiting frame 424 is disposed in one set of rectangular limiting grooves via electric sliders. The U-shaped limiting frame 424 is horizontally disposed and moves up and down along the rectangular limiting groove. A slider 425 that can move up and down along the rectangular limiting groove is disposed in one set of rectangular limiting grooves outside the limiting plate 423. A micro motor 426 is disposed inside the slider 425. The output shaft of the micro motor 426 is connected to a surrounding plate 427, which is used to limit the flux.

[0042] When welding assembly 41 is used to weld the tie rod 7 and the end plate 6 in two separate areas, the specific process is as follows: (See attached document) Figures 6-9 First, in the first area welding: Both micro motors 426 drive the surrounding plate 427 to rotate so that the inner arc surface of the surrounding plate 427 corresponds to the outer arc surface of the connecting rod 7. After completion, both sliders 425 slide to the bottom of the rectangular limiting groove via electric drive, so that the inner arc surface of the surrounding plate 427 fits against the outer arc surface of the connecting rod 7 (e.g., Figure 6 and Figure 7 (As shown).

[0043] Then, the bevel position of the tie rod 7 and the fitting area between the end plate 6 are welded by the welding assembly 41. Specifically, the welding effect is fully guaranteed by welding the area layer by layer in the circumferential direction away from the radial direction.

[0044] See Figures 10-15Second area welding: First, both micro motors 426 drive the surrounding plate 427 to rotate so that the side of the surrounding plate 427 corresponds to the outer arc surface of the connecting rod 7. After completion, both sliders 425 slide to the bottom of the rectangular limiting groove, so that the side of the surrounding plate 427 fits against the outer arc surface of the connecting rod 7 (e.g., Figure 10 and Figure 11 (As shown).

[0045] Then, preliminary welding is performed on the outer wall of the tie rod 7 and the end plate 6, located on the outer side of the first region, using welding assembly 41. The state of the limiting area after welding is as follows: Figure 12 As shown.

[0046] Next, the slider 425 near the welding head 412 moves to the uppermost position along the rectangular limiting groove. After completion, the micro motor 426 at this position drives the surrounding plate 427 to rotate so that the arc surface area of ​​the surrounding plate 427 corresponds to the outer arc surface of the connecting rod 7. Then, the connecting rod 7 is rotated at an angle through the supporting part 5, and the clamping and fixing part 3 simultaneously drives the clamped end plate 6 to rotate as well, specifically as follows. Figures 12-14 As shown; until the final welding is completed, as... Figure 15 As shown.

[0047] It should be noted that after the welding head 412 feeds the welding wire into the arc zone at a stable speed, the flux supply gun 413, through multiple coordinations, tightly fills the arc zone with flux. During welding, the flux melts under the heat of the arc to form a slag layer and a gas layer. The slag layer covers the surface of the molten pool, and the gas layer surrounds the arc, effectively isolating the molten pool metal from the air and preventing oxygen, nitrogen, and other gases from entering the molten pool. This avoids the metal reacting with these gases at high temperatures, thereby reducing the generation of defects such as porosity and oxides in the weld, improving the purity and mechanical properties of the weld metal. The tightly filled flux can greatly enhance the above-mentioned protective effect and fully guarantee the size of the effective bearing area.

[0048] Specifically, to improve the compactness of the flux filling, please refer to... Figure 4 and Figure 5 The two strip sections of the U-shaped limiting frame 424 are each provided with a through guide groove 431. A pressing member 432 is provided inside the two guide grooves 431. An electric push rod 433 is provided inside the U-shaped limiting frame 424 to drive the pressing member 432 to move horizontally along the guide groove 431. When welding the two areas separately, because the triangular cross-sections formed by the two welding areas are different in size, the pressing member 432 is moved along the guide groove 431 by the extension and retraction of the electric push rod 433. This allows for better adjustment of the position of the pressing member 432 so that the flux filled in each area can be pressed firmly.

[0049] See Figure 5 The pressing component 432 includes a pressing handle 441 and two semi-circular pressing heads 442. The pressing handle 441 is slidably disposed in the guide groove 431, and one end of the pressing handle 441 is connected to the telescopic end of the electric push rod 433. A semi-circular pressing head 442 is fixedly installed at the other end of the pressing handle 441. A semi-circular pressing head 442 is also disposed on the lower end face of the pressing handle 441 via an electric slider. Specifically, when the pressing component 432 presses the flux to improve the compactness of the flux filling, because the welding is divided into two areas, the first area (see...) Figure 8 The first area is the area where the bevel of tie rod 7 meets the end plate 6; the second area (see...) Figure 13 The first region is located between the outer wall of the tie rod 7 and the end plate 6, on the outer side of the first region. Since the cross-sectional sizes of the two regions are different, when pressing the flux in the two regions after filling, the efficiency of using a single semi-circular pressing head 442 to press the different sized regions is limited. Therefore, when pressing the flux in the second welding region, the semi-circular pressing head 442, which is set by an electric slider, slides along the lower end of the pressing handle 441 and fits against the fixedly installed semi-circular pressing head 442 before performing the pressing process. This increases the pressing area and greatly improves the pressing efficiency.

[0050] It should be noted that the materials of the retaining plate 427 and the pressing component 432 can be copper, graphite, or ceramic. In this embodiment, copper is preferred because copper has extremely high thermal conductivity, which can quickly conduct away the heat from the welding area, preventing its own temperature from rising to its melting point and physically avoiding fusion. Moreover, the melting point of the retaining plate 427 and the pressing component 432 made of copper is higher than the welding pool temperature of the tie rod 7 (steel) and the end plate 6 (steel) (usually about 1500°C). At the same time, copper and steel are immiscible in the liquid state, and the molten steel will not "wet" the copper surface. After cooling, they will naturally separate and fall off with a tap. Therefore, using copper for the retaining plate 427 and the pressing component 432 can effectively prevent the flux from sticking to the retaining plate 427 and the pressing component 432 during the welding process.

[0051] When welding the boom using this welding device, the bevel of the tie rod 7 and the end plate 6 can be circumferentially welded together, and the cross-section of the welded surface is triangular. By increasing the connection area and the triangular welded cross-section, the connection strength between the tie rod 7 and the end plate 6 is improved. In order to further improve the connection effect between the tie rod 7 and the end plate 6, a second welded surface with a triangular cross-section is formed along the outside of the weld at the position of the first weld. The second welded surface further reinforces the connection of the first welded surface, the tie rod 7 and the end plate 6, forming an interlocking structure, which further improves the connection strength of the boom after welding.

[0052] Because the strength requirements for the hangers of flexible suspension bridges are higher than those for ordinary members, this invention specifically designs a welding device for the hangers of flexible suspension bridges. Through the "double-layer triangular cross-section overlapping welding" process (the first area is welded at the root of the bevel, and the second area covers the outside of the first area), the two triangular welding areas form a nested and superimposed reinforcing structure, which greatly increases the effective weld depth and load-bearing cross-sectional area, changing the connection area from a "line" connection to a "surface" connection. This can more effectively disperse and transfer stress, avoiding the sharp concentration of stress at the weld root. Furthermore, the welding of the second area further fuses the welding surface of the first area, the tie rod 7, and the end plate 6 into a whole, forming an interlocking structure, which significantly improves the fatigue resistance and static load strength of the welding point between the tie rod 7 and the end plate 6. The formation of the overall weld is carried out gradually under the protection of flux under compaction treatment, resulting in a uniform weld surface without bubbles, further ensuring the welding strength of the hanger.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A flexible suspension bridge hanger welding device, Its characteristics include: frame; Control unit; located on one side of the frame, equipped with a display screen and operation buttons, used to input welding parameters and control the welding process; Clamping and fixing parts; located on the left and right sides of the frame, used to clamp and fix the end plate; Two welding actuators are respectively located on the left and right sides of the frame and are used to weld and fix the end plate and tie rod together. At least two support parts are provided on the upper end face of the frame to support the tie rod and drive the tie rod to rotate at a constant speed to switch the welding position. The end plate and the tie rod form annular welding surfaces in the first and second regions with inner and outer double-layer triangular cross sections. The welding surface of the second region fuses the welding surface of the first region, the tie rod and the end plate into a whole. The root of the weld bevel is in the first region, and the second region covers the outer side of the first region. The welding actuator includes a welding assembly and a forming limiting assembly; both the welding assembly and the forming limiting assembly are located on the side wall of the frame. The welding assembly is used to weld the weld seam between the end plate and the tie rod by submerged arc welding; the forming limiting assembly is used to limit and compact the flux during the welding process. The welding assembly includes a universal moving table mounted on a frame and capable of sliding in any direction, and a welding head, a flux supply gun, and a flux recovery gun respectively mounted on the universal moving table; the welding head feeds the welding wire into the arc zone at a stable speed; the flux supply gun spreads flux into the arc zone; and the flux recovery gun collects the unmelted flux after welding. The forming limiting assembly includes a transverse electric telescopic component disposed on the side wall of the frame and a longitudinal electric telescopic component connected to the telescopic end of the transverse electric telescopic component. The telescopic end of the longitudinal electric telescopic component is detachably mounted with a semi-arc-shaped limiting plate via a connecting block. The limiting plate has two sets of rectangular limiting grooves, one inside and one outside. A U-shaped limiting frame is disposed in the rectangular limiting groove inside the limiting plate via electric sliders. The U-shaped limiting frame is horizontally positioned and moves up and down along the rectangular limiting groove. A slider that can move up and down along the rectangular limiting groove is disposed in the rectangular limiting groove outside the limiting plate. A micro motor is disposed inside the slider. The output shaft of the micro motor is connected to a surrounding plate, which is used to limit the flux. During the welding of the first area, both micro motors drive the enclosure to rotate so that the inner arc surface of the enclosure corresponds to the outer arc surface of the tie rod. During the second area welding, both micro motors drive the enclosure to rotate so that the side of the enclosure corresponds to the outer arc surface of the tie rod.

2. The flexible suspension bridge hanger welding device according to claim 1, characterized in that, Both strip sections of the U-shaped limiting frame are provided with through guide grooves, and a pressing component is provided inside the two guide grooves. The U-shaped limiting frame is also provided with an electric push rod for driving the pressing component to move horizontally along the guide groove.

3. The flexible suspension bridge hanger welding device according to claim 2, characterized in that, The pressing component includes a pressing handle and two semi-circular pressing heads. The pressing handle is slidably disposed in the guide groove, and one end of the pressing handle is connected to the telescopic end of the electric push rod. A semi-circular pressing head is fixedly installed at the other end of the pressing handle. A semi-circular pressing head is also disposed on the lower end face of the pressing handle via an electric slider.

4. The flexible suspension bridge hanger welding device according to claim 1, characterized in that, The clamping and fixing part includes clamping plates, limiting plates, and reduction motors; the reduction motors are respectively mounted on the left and right ends of the frame via motor bases, and the output shafts of the reduction motors are connected to the limiting plates via flanges. The limiting plates are provided with clamping plates that can move closer or further away synchronously, and the clamping plates are symmetrically arranged about the center of the limiting plates; the limiting plates are also provided with a driving component inside for driving the two clamping plates to move closer or further away synchronously.

5. The flexible suspension bridge hanger welding device according to claim 1, characterized in that, The supporting part includes a support platform set at the upper end of the frame. Two synchronously rotating electric drive rollers are set at the upper end of the support platform via a bracket. The electric drive rollers are used to drive the tie rod placed at the upper end to rotate at a low speed.

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