Internal welding reinforcing device and method for U rib of orthotropic steel bridge deck slab

Abstract

The invention relates to the technical field of steel bridge welding, and discloses an inner welding reinforcing device and method for orthotropic steel bridge deck U ribs, and the device comprises automatic welding equipment, a first sliding rail, a movable gasket, an outer side magnetic attraction mechanism and a control system; a welding gun and a monitoring assembly are mounted on the automatic welding equipment; the monitoring assembly is used for monitoring the inner side welding seam position of the U rib. The first sliding rail is mounted at an inner side welding seam of the U-shaped rib in the welding direction; the movable gaskets are slidably connected to the first sliding rails, the tops of the movable gaskets make contact with the steel bridge deck, and the bottoms of the movable gaskets make contact with the inner side walls of the U-shaped ribs; the movable gasket is connected with automatic welding equipment through a connecting rod; the outer side magnetic attraction mechanism is slidably connected to the outer side wall of the U-shaped rib in the welding direction. The outer side magnetic attraction mechanism is located at the outer side welding seam of the U-shaped rib. Uniform penetration and high-quality forming of a U-rib inner side welding seam can be achieved, a molten pool is prevented from drooping, and the construction efficiency and overhead welding quality are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel bridge welding, and particularly to an internal welding reinforcement device and method for U-ribs of orthotropic steel bridge decks. Background Art

[0002] Orthotropic steel bridge decks with closed U-ribs are widely used in the construction of long-span steel bridges due to their excellent structural performance. In the early stage of steel bridges, there was no internal welding between the U-ribs and the bridge deck. After years of operation, cracks are likely to occur around the welds. In this case, reinforcement can be carried out by adding internal welding.

[0003] However, different from the manufacturing process of newly built steel bridge decks, when applying internal welding to U-ribs during operation, an automatic welding device needs to be used for overhead welding operation. Overhead welding is one of the most difficult welding positions, and its main difficulty lies in the sagging of the molten pool under the action of gravity, resulting in problems such as concave back of the weld, weld bead on the front, and poor weld formation, which affect the welding quality. Moreover, traditional methods of internal welding of U-ribs may require multiple weldings to achieve an ideal weld formation effect, which not only increases the welding time but also reduces the construction efficiency.

[0004] Therefore, an internal welding reinforcement device and method for U-ribs of orthotropic steel bridge decks are proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide an internal welding reinforcement device and method for U-ribs of orthotropic steel bridge decks, aiming to solve or improve at least one of the above technical problems.

[0006] To achieve the above purpose, the present invention provides the following solution: The present invention provides an internal welding reinforcement device for U-ribs of orthotropic steel bridge decks, including: An automatic welding equipment, on which a welding torch and a monitoring component are installed; the monitoring component is used to monitor the position of the inner weld of the U-rib; A first slide rail, which is installed along the welding direction at the inner weld of the U-rib; A moving backing, which is slidably connected to the first slide rail, the top of the moving backing contacts the steel bridge deck, and the bottom contacts the inner wall of the U-rib; the moving backing is connected to the automatic welding equipment through a connecting rod; An outer magnetic attraction mechanism, which is slidably connected to the outer wall of the U-rib along the welding direction; the outer magnetic attraction mechanism is located at the outer weld of the U-rib; A control system, to which the automatic welding equipment, the welding torch, the monitoring component, and the outer magnetic attraction mechanism are electrically connected.

[0007] An internal welding reinforcement device for the U-rib of an orthotropic steel bridge deck according to the present invention, wherein the movable backing includes a ceramic inner layer and a metal outer layer, the ceramic inner layer and the metal outer layer are fixedly connected, and the ceramic inner layer is disposed close to the inner weld of the U-rib.

[0008] An internal welding reinforcement device for the U-rib of an orthotropic steel bridge deck according to the present invention, wherein the outer magnetic attraction mechanism includes: A second slide rail fixedly installed on the outer wall of the U-rib along the welding direction; A magnet slidably connected to the second slide rail; the top of the magnet contacts the steel bridge deck; A driving device installed on the outer wall of the U-rib; the driving device is used to drive the magnet to slide along the second slide rail; Wherein, the driving device is electrically connected to the control system.

[0009] An internal welding reinforcement device for the U-rib of an orthotropic steel bridge deck according to the present invention, wherein a fixed support is installed on the inner wall of the U-rib, and the first slide rail is installed on the fixed support.

[0010] An internal welding reinforcement device for the U-rib of an orthotropic steel bridge deck according to the present invention, wherein the monitoring component includes a plurality of high-definition cameras, the plurality of high-definition cameras are installed on the automatic welding equipment, the high-definition cameras face the inner weld of the U-rib, and the plurality of high-definition cameras are all electrically connected to the control system.

[0011] An internal welding reinforcement device for the U-rib of an orthotropic steel bridge deck according to the present invention, wherein the magnet is a bar magnet.

[0012] An internal welding reinforcement device for the U-rib of an orthotropic steel bridge deck according to the present invention, wherein the metal outer layer is a steel plate outer layer, and the steel plate outer layer and the ceramic inner layer are bonded by a high-temperature adhesive.

[0013] The present invention also provides an internal welding reinforcement method for the U-rib of an orthotropic steel bridge deck, including the following steps: Step 1: Place the automatic welding equipment inside the U-rib; Step 2: Arrange a movable backing at the position of the inner weld of the U-rib, make the movable backing slide along the first slide rail, and connect the movable backing to the automatic welding equipment through a connecting rod; Step 3: Arrange an outer magnetic attraction mechanism outside the U-rib; Step 4: Perform overhead welding inside the U-rib; Step 5: Clean and inspect inside the U-rib after welding.

[0014] A method for internal welding reinforcement of U-ribs of orthotropic steel bridge decks provided by the present invention, the process of step four is as follows: Check the spatial position of the welding torch of the automatic welding equipment, and adjust the angle of the welding torch and the distance between the welding torch and the inner weld of the U-rib in real time through the control system; During the overhead welding process, the moving backing moves forward synchronously with the automatic welding equipment, and the outer magnetic attraction mechanism moves synchronously with the moving backing until the other end of the U-rib is welded.

[0015] A method for internal welding reinforcement of U-ribs of orthotropic steel bridge decks provided by the present invention, the process of step five is as follows: After the inner weld of the overhead welding cools down, the outer magnetic attraction mechanism, the moving backing and the automatic welding equipment are removed in sequence, the welding slag inside the U-rib is cleaned, and the inner weld is inspected to ensure that the surface of the inner weld meets the inspection requirements.

[0016] The present invention discloses the following technical effects: During the welding process of the present invention, the moving backing slides with the movement of the automatic welding equipment, always providing appropriate support for the weld; the outer magnetic attraction mechanism moves following the movement of the position of the moving backing, ensuring continuous magnetic attraction with the moving backing, ensuring the dynamic formation of the molten pool, thereby effectively improving the efficiency and quality of overhead welding; The moving backing adopted by the present invention can realize the one-time forming of the inner weld of the U-rib, thereby shortening the welding time. During the welding process, the moving backing slides along the first slide rail and works in coordination with the automatic welding equipment to ensure that the weld can be well supported and protected throughout the welding process, thereby avoiding the cumbersome operations of multiple weldings, greatly shortening the welding time, and significantly improving the construction efficiency; By introducing a moving backing inside the U-rib and cooperating with an outer magnetic attraction mechanism arranged outside the U-rib, overhead welding is carried out inside the U-rib. The outer magnetic attraction mechanism moves following the movement of the position of the moving backing, ensuring continuous magnetic attraction with the moving backing, ensuring that the top of the moving backing is in close contact with the steel bridge deck and the bottom is in contact with the inner wall of the U-rib during overhead welding, providing stable support for the molten pool, preventing the molten pool from sagging, ensuring uniform penetration and high-quality forming of the inner weld of the U-rib, effectively reducing the generation of defects such as incomplete penetration and weld cracks, effectively improving the efficiency and quality of overhead welding, and providing a strong guarantee for the safety and durability of orthotropic steel bridge decks. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is the structural schematic diagram of the present invention; Figure 2 is Figure 1 the partial enlarged view of A in; Figure 3 the front view of the present invention; Figure 4 is the structural schematic diagram of the moving backing in the present invention; Figure 5 is the schematic diagram of the present invention device for performing overhead welding inside the U-rib; Figure 6 is the installation schematic diagram of the second slide rail and the magnet in the present invention; Figure 7 is the structural schematic diagram of the steel bridge deck and the U-rib in the present invention.

[0019] Among them, 1, automatic welding equipment; 2, welding torch; 3, inner weld seam; 4, first slide rail; 5, moving backing; 51, ceramic inner layer; 52, metal outer layer; 6, steel bridge deck; 7, U-rib; 8, second slide rail; 9, magnet; 10, fixed support; 11, outer weld seam. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0022] Referring to Figures 1-7 , the present invention provides an internal welding reinforcement device for the U-rib of an orthotropic steel bridge deck, including: An automatic welding equipment 1, on which a welding torch 2 and a monitoring component are installed; the monitoring component is used to monitor the position of the inner weld seam 3 of the U-rib 7; A first slide rail 4, which is installed at the inner weld seam 3 of the U-rib 7 along the welding direction; The moving pad 5 is slidably connected to the first slide rail 4. The top of the moving pad 5 contacts the steel bridge deck 6, and the bottom contacts the inner sidewall of the U-rib 7. The moving pad 5 is connected to the automatic welding device 1 through a connecting rod. The geometric parameters of the moving pad 5 are determined according to the size of the inner weld 3 of the U-rib 7 to ensure that the moving pad 5 can closely adhere to the entire molten pool during the welding process, and the upper and lower surfaces of the moving pad 5 are closely adhered to the steel bridge deck 6 and the U-rib 7 respectively.

[0023] The outer magnetic attraction mechanism is slidably connected to the outer sidewall of the U-rib 7 along the welding direction. The outer magnetic attraction mechanism is located at the outer weld 11 of the U-rib 7. The control system. The automatic welding device 1, the welding torch 2, the monitoring component, and the outer magnetic attraction mechanism are all electrically connected to the control system. In this embodiment, the control system adopts a wireless control system. The forward speed of the automatic welding device 1, the forward movement speed of the connecting rod, and the welding speed of the welding torch 2 are controlled through the wireless control system. With such a setting, during the welding process of the present invention, the moving pad 5 slides as the automatic welding device 1 moves, always providing appropriate support for the weld. The outer magnetic attraction mechanism follows the movement according to the movement of the position of the moving pad, ensuring continuous magnetic attraction with the moving pad, ensuring the dynamic formation of the molten pool, thereby effectively improving the overhead welding efficiency and quality. The present invention adopts the moving pad 5 to realize the one-time forming of the inner weld 3 of the U-rib 7, thereby shortening the welding time. During the welding process, the moving pad 5 slides along the first slide rail 4 and works in cooperation with the automatic welding device 1 to ensure that the weld can be well supported and protected throughout the welding process, thereby avoiding the cumbersome operations of multiple weldings, greatly shortening the welding time, and significantly improving the construction efficiency. The present invention introduces a moving pad 5 inside the U-rib 7 and cooperates with an outer magnetic attraction mechanism arranged on the outside of the U-rib 7 to perform overhead welding inside the U-rib 7. The outer magnetic attraction mechanism follows the movement according to the movement of the position of the moving pad 5, ensuring continuous magnetic attraction with the moving pad 5, ensuring that the top of the moving pad 5 is in close contact with the steel bridge deck 6 and the bottom is in contact with the inner sidewall of the U-rib 7 during overhead welding, providing stable support for the molten pool, preventing the molten pool from sagging, ensuring uniform penetration and high-quality forming of the inner weld of the U-rib 7, effectively reducing the generation of defects such as lack of penetration and weld cracks, effectively improving the overhead welding efficiency and quality, and providing a strong guarantee for the safety and durability of the orthotropic steel bridge deck 6.

[0024] In a further optimized solution, the moving pad 5 includes a ceramic inner layer 51 and a metal outer layer 52. The ceramic inner layer 51 and the metal outer layer 52 are fixedly connected, and the ceramic inner layer 51 is arranged close to the inner weld 3 of the U-rib 7. The ceramic inner layer 51 has good high-temperature resistance and chemical stability, can maintain the structural integrity in the high-temperature welding environment, and at the same time provides stable support for the molten pool, prevents the molten pool from sagging, and ensures good back formation of the weld seam; the metal outer layer 52 is a steel plate outer layer, which has high strength and rigidity, can withstand the pressure and friction during the welding process, and enhances the overall stability of the moving pad 5 through bonding with the ceramic inner layer 51.

[0025] In a further optimized solution, the outer magnetic attraction mechanism includes: A second slide rail 8, which is fixedly installed on the outer side wall of the U-rib 7 along the welding direction; A magnet 9, which is slidably connected to the second slide rail 8; the top of the magnet 9 contacts the steel bridge deck 6; A driving device, which is installed on the outer side wall of the U-rib 7; the driving device is used to drive the magnet 9 to slide along the second slide rail 8; Among them, the driving device is electrically connected to the control system; in this embodiment, the driving device adopts an electric push rod, and the electric push rod uses a motor as a power source to drive the magnet 9 to slide along the second slide rail 8; The second slide rail 8 is fixedly installed on the outer side wall of the U-rib 7 along the welding direction, providing a track for the sliding of the magnet 9; the magnet adopts a bar magnet, and its top contacts the steel bridge deck 6, which can generate stable magnetic force to attract the moving pad 5 of the inner weld seam, so as to assist in controlling the shape and position of the molten pool during welding and prevent the molten pool from sagging due to gravity; during welding, the driving device drives the magnet 9 to slide along the second slide rail 8 according to the instructions of the control system, so that it always moves synchronously with the moving pad 5, ensuring that appropriate magnetic force assistance can be provided for the molten pool at any position during welding and guaranteeing the quality of the weld seam.

[0026] In a further optimized solution, a fixed support 10 is installed on the inner side wall of the U-rib 7, and the first slide rail 4 is installed on the fixed support 10; During welding, the moving pad 5 is connected to the automatic welding device 1 through a connecting rod and slides synchronously as the automatic welding device 1 moves along the welding direction, always providing support for the weld seam and ensuring that the weld seam can be well protected throughout the welding process.

[0027] In a further optimized solution, the monitoring component includes a number of high-definition cameras, which are installed on the automatic welding device 1, the high-definition cameras face the inner weld seam 3 of the U-rib 7, and a number of high-definition cameras are all electrically connected to the control system; The high-definition cameras can collect the image information of the weld seam in real time and transmit it to the control system. The control system analyzes and processes the image information, monitors the position, shape and quality of the weld seam in real time, discovers problems that occur during welding in time, and adjusts parameters such as the angle and distance of the welding torch 2 to ensure the welding quality.

[0028] For a further optimized solution, the magnet 9 is a bar magnet.

[0029] For a further optimized solution, the metal outer layer 52 is a steel plate outer layer, and the steel plate outer layer is bonded to the ceramic inner layer 51 by a high-temperature adhesive.

[0030] The present invention also provides an internal welding reinforcement method for the U-rib of an orthotropic steel bridge deck, comprising the following steps: Step 1: Place the automatic welding device 1 inside the U-rib 7; Step 2: Arrange a movable backing 5 at the position of the inner weld 3 of the U-rib 7, make the movable backing 5 slide along the first slide rail 4, and connect the movable backing 5 to the automatic welding device 1 through a connecting rod; Step 3: Arrange an outer magnetic attraction mechanism outside the U-rib 7; Step 4: Perform overhead welding on the inner side of the U-rib 7; Step 5: Clean and inspect inside the U-rib 7 after welding.

[0031] For a further optimized solution, the process of Step 4 is as follows: Check the spatial position of the welding torch 2 of the automatic welding device 1, and adjust the angle of the welding torch 2 and the distance between the welding torch 2 and the inner weld 3 of the U-rib 7 in real time through the control system; During the overhead welding process, the movable backing 5 moves forward synchronously with the automatic welding device 1, and the outer magnetic attraction mechanism moves synchronously with the movable backing 5 until the other end of the U-rib 7 is welded.

[0032] For a further optimized solution, the process of Step 5 is as follows: After the inner weld 3 of the overhead welding cools down, remove the outer magnetic attraction mechanism, the movable backing 5 and the automatic welding device 1 in sequence, clean the welding slag inside the U-rib 7, and inspect the inner weld 3 to ensure that the surface of the inner weld 3 meets the inspection requirements, and ensure that the surface of the inner weld 3 is flat and has no obvious defects.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. An internal welding reinforcement device for U-ribs of orthotropic steel bridge decks, characterized in that, Comprising: An automatic welding device (1), on which a welding torch (2) and a monitoring component are installed; the monitoring component is used to monitor the position of the inner weld seam (3) of the U-rib (7); A first slide rail (4), which is installed along the welding direction at the inner weld seam (3) of the U-rib (7); A moving gasket (5), which is slidably connected to the first slide rail (4), the top of the moving gasket (5) contacts the steel bridge deck (6), and the bottom contacts the inner wall of the U-rib (7); the moving gasket (5) is connected to the automatic welding device (1) through a connecting rod; An outer magnetic attraction mechanism, which is slidably connected to the outer wall of the U-rib (7) along the welding direction; the outer magnetic attraction mechanism is located at the outer weld seam (11) of the U-rib (7); A control system, and the automatic welding device (1), the welding torch (2), the monitoring component and the outer magnetic attraction mechanism are all electrically connected to the control system.

2. The internal welding reinforcement device for U ribs of orthotropic steel bridge decks according to claim 1, wherein: The moving gasket (5) includes a ceramic inner layer (51) and a metal outer layer (52), the ceramic inner layer (51) and the metal outer layer (52) are fixedly connected, and the ceramic inner layer (51) is arranged close to the inner weld seam (3) of the U-rib (7).

3. The internal welding reinforcement device for U-ribs of orthotropic steel bridge decks according to claim 1, characterized in that: The outer magnetic attraction mechanism includes: A second slide rail (8), which is fixedly installed on the outer wall of the U-rib (7) along the welding direction; A magnet (9), which is slidably connected to the second slide rail (8); the top of the magnet (9) contacts the steel bridge deck (6); A driving device, which is installed on the outer wall of the U-rib (7); the driving device is used to drive the magnet (9) to slide along the second slide rail (8); Wherein, the driving device is electrically connected to the control system.

4. The internal welding reinforcement device for U-ribs of orthotropic steel bridge decks according to claim 3, characterized in that: A fixed support (10) is installed on the inner wall of the U-rib (7), and the first slide rail (4) is installed on the fixed support (10).

5. The internal welding reinforcement device for U-ribs of orthotropic steel bridge decks according to claim 1, characterized in that: The monitoring component includes a plurality of high-definition cameras, and the plurality of high-definition cameras are installed on the automatic welding device (1), the high-definition cameras face the inner weld seam (3) of the U-rib (7), and the plurality of high-definition cameras are all electrically connected to the control system.

6. The internal welding reinforcement device for U-ribs of orthotropic steel bridge decks according to claim 3, characterized in that: The magnet (9) is a bar magnet.

7. The internal welding reinforcement device for U-ribs of orthotropic steel bridge decks according to claim 2, characterized in that: The metal outer layer (52) is a steel plate outer layer, and the steel plate outer layer is bonded to the ceramic inner layer (51) through a high-temperature adhesive.

8. A method for internal welding reinforcement of U-ribs of orthotropic steel bridge decks, based on the internal welding reinforcement device for U-ribs of orthotropic steel bridge decks according to any one of claims 1-7, characterized in that, Including the following steps: Step 1: Place the automatic welding device (1) inside the U-rib (7); Step 2: Arrange the moving gasket (5) at the position of the inner weld seam (3) of the U-rib (7), make the moving gasket (5) slide along the first slide rail (4), and connect the moving gasket (5) to the automatic welding device (1) through a connecting rod; Step 3: Arrange the outer magnetic attraction mechanism outside the U-rib (7); Step 4: Perform overhead welding inside the U-rib (7); Step 5: Clean and inspect inside the U-rib (7) after welding.

9. The internal welding reinforcement method for U-ribs of orthotropic steel bridge decks according to claim 8, wherein: The process of the said Step 4 is: Check the spatial position of the welding torch (2) of the automatic welding equipment (1), and adjust the angle of the welding torch (2) and the distance between the welding torch (2) and the inner weld seam (3) of the U-rib (7) in real time through the control system; During the overhead welding process, the moving backing (5) moves forward synchronously with the automatic welding equipment (1), and the outer magnetic attraction mechanism moves synchronously with the moving backing (5) until welding reaches the other end of the U-rib (7).

10. The internal welding reinforcement method for U-ribs of orthotropic steel bridge decks according to claim 8, characterized in that: The process of the fifth step is as follows: after the inner weld seam (3) of the overhead welding cools down, the outer magnetic attraction mechanism, the moving backing (5) and the automatic welding equipment (1) are removed in sequence, the welding slag inside the U-rib (7) is cleaned, and the inner weld seam (3) is inspected to ensure that the surface of the inner weld seam (3) meets the inspection requirements.

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