A device for controlling the welding gap of a steel structure bridge T joint

Abstract

The utility model relates to the technical field of welding, and concretely discloses a device for controlling the welding gap of a T-shaped joint of a steel structure bridge, which comprises a base body, a lifting device and a clamping mechanism, the lifting device is arranged on the base body, the clamping mechanism is arranged at the bottom of the lifting device, an annular structure bracket is arranged on the base body, a plurality of bracket supporting legs are welded on the annular structure bracket, and a variable magnetic force support is arranged at the bottom of the bracket supporting leg; the clamping mechanism comprises a mounting block, a sliding groove is arranged on the mounting block, two sliding wheels are slidably arranged in the sliding groove, a clamp connecting rod is arranged on the sliding wheel, and the clamp connecting rod is connected with a rib plate clamp; the device further comprises a screw rod, the screw threads at the two ends of the screw rod are opposite in rotation direction, and the screw rod is threadedly connected with the two clamp connecting rods. The utility model has the advantages of avoiding welding leakage, controlling welding seam deformation, reducing internal defects, improving welding quality, reducing welding cost, being easy to operate, avoiding damage to the base material and the like compared with the traditional process.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a device for controlling the welding gap of T-joints in steel structure bridges. Background Technology

[0002] Steel structure bridges are widely used in my country's transportation construction sector, with numerous projects across the country showcasing their applications. Welding, a key step in the manufacturing process of steel structure bridges, makes weld quality control paramount; excellent welding techniques are essential for ensuring the quality of steel structure bridges. Ribs are a crucial component of steel structure bridges, primarily enhancing their rigidity and strength, improving their load-bearing capacity, and resistance to deformation. Furthermore, a well-designed rib plate can reduce stress concentration during use, lowering the risk of fatigue failure and extending the bridge's service life. The T-joints of the steel structure bridge ribs form the main integral plate unit with the top and bottom plates; therefore, controlling the weld quality of these T-joints is critical throughout the entire steel structure bridge manufacturing process.

[0003] The top and bottom ribs of steel bridge structures commonly come in three forms: I-ribs, T-ribs, and U-ribs. I-ribs and T-ribs often require perpendicular welding at a 90° angle to the top and bottom ribs. However, during the manufacturing process of bridge top and bottom ribs, multiple factors such as hoisting, stacking, welding heat shrinkage, and hot working can easily cause stress within the plate units, leading to warping and preventing the plate surface from achieving the ideal processing state. Therefore, the welding gap is often difficult to control during the welding of the top and bottom ribs (I-ribs and T-ribs), resulting in a series of problems such as incomplete welds, weld deformation, internal weld defects, and increased welding costs. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for controlling the welding gap of T-joints in steel structure bridges.

[0005] The purpose of this utility model is achieved through the following technical solution: a device for controlling the welding gap of T-joints in steel structure bridges, comprising a base, a lifting device and a clamping mechanism, wherein the lifting device is disposed on the base, the clamping mechanism is disposed at the bottom of the lifting device, an annular structure bracket is disposed on the base, a plurality of bracket legs are welded on the annular structure bracket, and a variable magnetic support is disposed at the bottom of the bracket legs.

[0006] The clamping mechanism includes a mounting block with a sliding groove. Two sliding wheels are slidably disposed in the sliding groove. A clamping link is disposed on each sliding wheel and connected to a rib clamp. The clamping link has a threaded connection hole with opposite thread directions. The mechanism also includes a screw with opposite thread directions at both ends and threadedly connected to the two clamping links.

[0007] Specifically, the bracket legs are connected to the variable magnetic support via a hemispherical stiffening structure.

[0008] Specifically, a handle is provided on the top of the substrate.

[0009] Specifically, the screw is connected to a rocker arm, the mounting block is provided with a circular hole for connecting a sliding groove, both ends of the screw extend through the circular hole to the outside of the mounting block, and both ends of the screw are threaded with fastening nuts on the outside of the mounting block.

[0010] Specifically, a sliding hole is provided on the inner side of the lower end of the rib clamp, a return spring is provided in the sliding hole, and a clamp hook is slidably connected to the sliding hole.

[0011] Specifically, the inner side of the rib clamp is provided with concave and convex oblique textures.

[0012] This utility model has the following advantages:

[0013] This invention overcomes the problem of uneven weld surfaces caused by excessive welding gaps, thereby improving the appearance quality of the weld and ensuring a better overall aesthetic and visual effect. Furthermore, with the improved weld quality, there is no need to increase the manpower, material resources, and time costs for correcting weld defects, making the welding work more economical. Traditional processes typically use a welding reaction gantry combined with jacks to apply pressure to the ribs. However, the welding gantry and the subsequent gas cutting gantry at the connection with the plate unit base material both cause some damage to the plate unit base material. This invention uses a variable magnetic support, which effectively avoids these problems and eliminates the need for welding, greatly simplifying the operation process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the device for controlling the welding gap of T-joints in steel structure bridges according to this utility model;

[0015] Figure 2 This is a schematic diagram of the clamping mechanism of this utility model;

[0016] Figure 3 This is a schematic diagram of the rib clamp structure of this utility model.

[0017] In the diagram: 1-Base, 2-Ring structure bracket, 3-Bracket support, 4-Lifting device, 5-Mounting block, 6-Hemispherical stiffening structure, 7-Variable magnetic support, 8-Rib clamp, 9-Rock arm, 10-Base handle, 11-Sliding groove, 12-Screw, 13-Sliding wheel, 14-Clamping rod, 15-Fasting nut, 16-Clamping hook. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0022] like Figures 1 to 3As shown, a device for controlling the welding gap of T-joints in steel structure bridges includes a base 1, a lifting device 4, and a clamping mechanism. The lifting device 4 is disposed on the base 1, and the clamping mechanism is disposed at the bottom of the lifting device 4. An annular structure bracket 2 is disposed on the base 1, and multiple bracket legs 3 are welded on the annular structure bracket 2. A variable magnetic support 7 is disposed at the bottom of the bracket legs 3.

[0023] The clamping mechanism includes a mounting block 5 with a sliding groove 11. Two sliding wheels 13 are slidably disposed within the sliding groove 11, and clamping rods 14 are mounted on the sliding wheels 13. The clamping rods 14 are connected to a rib clamp 8. The clamping rods 14 have threaded connection holes with opposite thread directions. The mechanism also includes a screw 12 with opposite thread directions at both ends, which is threadedly connected to the two clamping rods 14. The bracket support 3 is connected to a variable magnetic support 7 via a hemispherical stiffening structure 6. A base handle 10 is provided on the top of the base 1. The screw 12 is connected to a rocker arm 9. The mounting block 5 has a circular hole for connecting to the sliding groove 11. Both ends of the screw 12 extend through the circular hole to the outside of the mounting block 5, and both ends of the screw 12 located on the outer side of the mounting block 5 are threadedly connected to fastening nuts 15. The rib clamp 8 has a sliding hole on its inner side at the lower end, and a return spring is installed in the sliding hole. The clamp hook 16 is slidably connected to the sliding hole. The inner side of the rib clamp 8 has concave and convex oblique textures. The lifting device 4 adopts a worm gear lift.

[0024] When processing the "T-rib", the worker first holds the base handle 10 and places the bracket legs 3 symmetrically across the extension direction of the "T-rib". In this embodiment, four bracket legs 3 are symmetrically arranged. After the position is determined, the variable magnetic support 7 knob is rotated to fix the position of the overall device. The variable magnetic support has a knob control switch to adjust the magnetic force generation or cancellation. Then, the rib plate clamp 8 is threaded together with the clamp connecting rod 14 to complete the installation step. Rotating the rocker arm 9 causes the two clamp connecting rods 14 to move the rib plate clamp 8 towards each other so that it is close to the "T-rib". At this time, rotating the lifting control dial causes the lifting device 4 to drive the mounting block 5 to press down. The clamp hook 16 is engaged with the upper plate of the "T-rib"; then the rocker arm 9 is rotated again to apply pressure to the "T-rib" until it is clamped. The two fastening nuts 15 are rotated in sequence until the two nuts are completely pressed against both sides of the mounting block 5 to fix the rocker arm 9. Then, the welding gap standard is determined according to the welding process specification, and the position of the "T-rib" is adjusted by rotating the lifting control dial to press down or lift it. After the position is fixed, spot welding is performed to complete the control operation. Finally, the fastening nuts 15 are rotated in the opposite direction to adjust them, the rocker arm 9 is rotated in the opposite direction to release the "T-rib", the variable magnetic support 7 knob is rotated to cancel the magnetic force, and the device is moved to the next working section to repeat the above steps for continued use.

[0025] When processing the "I rib", the worker first holds the base handle 10 and places the bracket legs 3 of the overall device symmetrically across the extension direction of the "I rib". After the position is determined, the variable magnetic support 7 knob is rotated to fix the position of the overall device. Then, the rib plate clamp 8 is taken out and connected to the clamp connecting rod 14 to complete the installation step. The rocker arm 9 is rotated so that the two clamp connecting rods 14 drive the rib plate clamp 8 to move towards each other and make it close to the "I rib". Then, the rocker arm 9 is rotated again to apply pressure to the "I rib" until it is clamped. The fastening nut 15 is rotated and adjusted in sequence until the two nuts are completely close to both sides of the mounting block 5 to fix the rocker arm 9. Then, the welding gap standard is determined according to the welding process guide. The position of the "I rib" is adjusted by rotating the lifting control dial to press down or lift. After the position is fixed, spot welding is performed to complete the control operation. Finally, the fastening nut 15 is rotated in the opposite direction, the rocker arm 9 is rotated in the opposite direction to release the "I rib", the variable magnetic support 7 knob is rotated to cancel the magnetic force, and the device is moved to the next working section to repeat the above steps for continued use.

[0026] When the plate unit is long, repeat the above single device operation steps and place multiple devices of this utility model at appropriate intervals to complete the overall working section rib welding gap control work.

[0027] When the workpiece is a "T-rib", the clamp hook 16 is in the open state; when the workpiece is an "I-rib", the clamp hook 16 is in the retracted state, and the return spring is compressed.

[0028] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. A device for controlling the welding gap of T-joints in steel structure bridges, characterized in that: It includes a base (1), a lifting device (4) and a clamping mechanism. The lifting device (4) is set on the base (1), and the clamping mechanism is set at the bottom of the lifting device (4). A ring structure bracket (2) is set on the base (1). Multiple bracket legs (3) are welded on the ring structure bracket (2). A variable magnetic support (7) is set at the bottom of the bracket legs (3). The clamping mechanism includes a mounting block (5), on which a sliding groove (11) is provided. Two sliding wheels (13) are slidably arranged in the sliding groove (11). A clamping link (14) is provided on the sliding wheel (13). The clamping link (14) is connected to a rib clamp (8). A threaded connection hole is provided on the clamping link (14). The threads of the two clamping links (14) have opposite directions. The mechanism also includes a screw (12). The threads at both ends of the screw (12) have opposite directions. The screw (12) is threadedly connected to the two clamping links (14).

2. The device for controlling the welding gap of T-joints in steel structure bridges according to claim 1, characterized in that: The bracket support (3) is connected to the variable magnetic support (7) through the hemispherical stiffening structure (6).

3. The device for controlling the welding gap of T-joints in steel structure bridges according to claim 1, characterized in that: The top of the substrate (1) is provided with a substrate handle (10).

4. The device for controlling the welding gap of T-joints in steel structure bridges according to claim 1, characterized in that: The screw (12) is connected to a rocker arm (9), and the mounting block (5) is provided with a circular hole for connecting the sliding groove (11). Both ends of the screw (12) extend through the circular hole to the outside of the mounting block (5), and both ends of the screw (12) are threaded with fastening nuts (15) on the outside of the mounting block (5).

5. The device for controlling the welding gap of T-joints in steel structure bridges according to claim 1, characterized in that: The inner side of the lower end of the rib clamp (8) is provided with a sliding hole, a return spring is provided in the sliding hole, and a clamp hook (16) is slidably connected to the sliding hole.

6. The device for controlling the welding gap of T-joints in steel structure bridges according to claim 5, characterized in that: The inner side of the rib clamp (8) is provided with concave and convex oblique texture.

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