Steel box girder weld fixing and welding device

Abstract

The utility model discloses a kind of steel box girder weld fixed welding devices, it is related to steel box girder welding technical field.The device includes positioning assembly and fastening assembly;Positioning assembly is composed of multiple positioning blocks with arc-shaped clamping slot, and arc-shaped clamping slot is clamped with the edge of steel plate on both sides of weld and is welded fixed to realize preliminary positioning;Fastening assembly includes screw jack and pressing block, and screw jack top is contacted with the bottom of pressing block, and the top of pressing block is attached to the surface of steel plate in weld area, and the screw jack jacking force makes pressing block tightly press together the steel plate on both sides of weld. Positioning block is arranged along the length direction of weld with interval, and the diameter of its arc-shaped clamping slot is adapted to the thickness of steel plate edge;Screw jack provides stable jacking force, and pressing block is adapted to the profile of steel plate surface. The device is tightly pressed together by positioning assembly multi-point positioning and fastening assembly, effectively improves weld positioning accuracy and adhesion, and guarantees welding quality.

Description

Technical Field

[0001] This utility model belongs to the field of steel box girder welding technology, specifically relating to a steel box girder weld fixing welding device. Background Technology

[0002] In engineering fields such as bridges and buildings, steel box girders are key load-bearing structures, and the quality of their welds directly affects the strength and safety of the overall structure. Traditional steel box girder welding construction often relies on manual assistance or simple tooling for positioning and fastening the steel plates on both sides of the weld. This results in problems such as insufficient positioning accuracy, poor fastening stability, and difficulty in controlling welding deformation. Manual positioning is prone to errors that can cause relative displacement of the steel plates; the fastening force of simple tooling is difficult to adjust precisely; and the steel plates are susceptible to warping or misalignment due to thermal stress during welding, leading to defects such as porosity and cracks in the weld. This not only reduces the stability of weld quality and increases subsequent maintenance costs but also prolongs the construction period due to rework.

[0003] Chinese Patent No. CN2447384Y discloses a steel box girder welding machine, relating to the field of welding machine technology. It includes a support base, with clamping components fixedly installed on both sides of the top edge of the support base. Brackets are welded to the front and rear ends of the support base, and a welding device is detachably installed on the top of the brackets. A welding table is fixedly installed in the middle of the top of the support base. The clamping components internally include a fixing unit and a rotating unit. This invention uses a drive motor to rotate a drive rod at a uniform speed. Simultaneously, the drive rod rotates a rotating gear, causing the teeth to rotate the upper and lower clamping plates. A magnetic sheet ensures that both the upper and lower clamping plates adhere to the outer surface of the steel box girder, thus driving the steel box girder to rotate at a uniform speed. This saves manpower in flipping the steel box girder and improves the efficiency of fully automated processing. However, the clamping components of the aforementioned device use magnetic adsorption and overall clamping, which can only fix the outer contour of the steel box girder. It cannot accurately position the edges of the steel plates on both sides of the weld, and is prone to weld misalignment due to gaps in the steel plate fit or relative positional misalignment. Therefore, it is imperative for those skilled in the art to solve the aforementioned technical problems. Summary of the Invention

[0004] This invention aims to solve the problems of existing technology by using the positioning block of the positioning component to engage and weld, thereby effectively ensuring the relative positional accuracy of the steel plates on both sides of the weld and avoiding displacement before welding.

[0005] The technical solutions adopted in this utility model are as follows: A welding device for fixing welds in steel box girders includes a positioning component and a fastening component; The positioning component consists of multiple positioning blocks arranged in an array. Each positioning block is a metal block with an arc-shaped groove. The arc-shaped groove is used to engage the edges of the steel plates on both sides of the weld of the steel box girder. The positioning blocks are welded and fixed to the edges of the steel plates to achieve initial positioning. The fastening assembly includes a screw jack and a pressure block. The top of the screw jack contacts the bottom of the pressure block, and the top of the pressure block is used to fit against the surface of the steel plate in the weld area. The lifting force of the screw jack causes the pressure block to tightly press the steel plates on both sides of the weld together.

[0006] By adopting the above technical solution, the positioning block of the positioning component engages with the edges of the steel plates on both sides of the weld and is welded and fixed. Combined with the abutting cooperation between the spiral jack and the pressure block in the fastening component, an integrated assembly relationship of positioning and fastening is formed. The engaging structure of the positioning block ensures the initial position of the steel plates on both sides of the weld is accurate, and the welding fixation avoids positioning loosening; the rigid contact between the spiral jack and the pressure block can tightly press the steel plates together through the lifting force, effectively preventing displacement before welding and separation of the steel plates during the welding process, and ensuring the fitting accuracy of the weld area.

[0007] Furthermore, the diameter of the arc-shaped groove of the positioning block is adapted to the thickness of the edge of the steel plate of the steel box girder, and the number of positioning blocks is not less than two, which are spaced apart along the length of the weld.

[0008] By adopting the above technical solution, the diameter of the arc-shaped groove of the positioning block is adapted to the thickness of the steel plate edge, and no less than two positioning blocks are set at intervals along the length of the weld seam to ensure that each positioning point can tightly engage the steel plate and avoid positioning offset caused by the gap of the groove; the interval distribution of multiple positioning blocks can disperse the fixing stress and form multi-point support for the steel plates on both sides of the weld seam, further improving the overall positioning stability and preventing the steel plate from warping caused by uneven local stress.

[0009] Furthermore, the screw jack is a 20T screw jack, and its lifting stroke is not less than 10cm.

[0010] By adopting the above technical solution, the screw jack, with a 20T specification and a lifting stroke of not less than 10cm, provides the device with sufficient load capacity and adjustment range through its assembly relationship with the pressure block. The rated load capacity of 20T ensures stable tightening force, meeting the fitting requirements during thick steel plate welding; while the lifting stroke of not less than 10cm allows for flexible adjustment of the pressure block height according to the steel plate thickness, welding process, and other scenarios, giving the device good adaptability to the tightening operations of welded seams of steel box girders of different specifications, and avoiding incomplete tightening due to insufficient stroke.

[0011] Furthermore, the bottom of the pressure block is provided with a groove, the shape of which is adapted to the top shape of the spiral jack, and the top of the pressure block is provided with a protruding structure, the shape of which is adapted to the surface contour of the steel plate in the weld area of ​​the steel box girder.

[0012] By adopting the above technical solution, the bottom groove of the pressure block is adapted to the shape of the top of the spiral jack, and the top protrusion is adapted to the contour of the steel plate in the weld area. This two-way adapted assembly relationship enables the pressure block to form surface contact with the jack and the steel plate. The bottom groove can prevent the pressure block from sliding relative to the jack, ensuring that the lifting force is transmitted vertically to the steel plate; the top protrusion can conform to the curved or irregular contour of the weld area, avoiding local stress concentration, and making the fastening force evenly distributed on both sides of the weld, reducing the deformation of the steel plate caused by uneven force.

[0013] Furthermore, the positioning block is a steel plate metal block with a thickness of 10-20mm, and the inner wall of the arc-shaped groove is provided with anti-slip texture.

[0014] By adopting the above technical solution, the positioning block is made of a 10-20mm thick steel plate, and the inner wall of the arc-shaped groove is provided with anti-slip texture. This material and structural assembly design improves the rigidity and friction of the positioning block itself. The thickness of the steel plate ensures that the positioning block is not easily deformed during welding, fixing, and load-bearing, providing reliable support for positioning; the anti-slip texture increases the friction coefficient between the groove and the edge of the steel plate, preventing the positioning block from sliding relative to the steel plate due to vibration or external force before or during welding, further consolidating the positioning accuracy.

[0015] Furthermore, the fastening assembly also includes a support base, on which the bottom of the screw jack is placed, and on which the upper surface of the support base is provided with an anti-slip pad.

[0016] By adopting the above technical solution, the fastening assembly supports the screw jack via a support base, and the upper surface of the base is equipped with an anti-slip pad. This assembly provides a stable support foundation for the screw jack. The support base increases the contact area between the jack and the ground, reduces local pressure, and prevents the jack from sinking into the support surface during lifting. The anti-slip pad prevents the jack from shifting horizontally due to force backlash or vibration, ensuring that the lifting force always acts on the preset position of the pressure block, thus guaranteeing the stability and safety of the fastening process.

[0017] This utility model has the following beneficial effects: 1. This utility model achieves a synergistic effect from initial positioning to dynamic fastening by integrating the positioning component and the fastening component. Specifically, the positioning block engages with the edges of the steel plates on both sides of the weld and is welded and fixed. Combined with the abutting cooperation of the spiral jack and the pressure block, this effectively ensures the fitting accuracy of the weld area and prevents the steel plates from separating or shifting during the welding process. 2. This utility model forms a multi-point distributed positioning structure by adapting the positioning block arc groove to the thickness of the steel plate edge, and by setting multiple positioning blocks at intervals along the weld length direction. This avoids positioning offset caused by the gap between the grooves, while dispersing the fixing stress, improving the overall positioning stability, and preventing steel plate warping caused by uneven local stress. 3. By selecting a specific specification of spiral jack, the assembly relationship between the jack and the pressure block gives the device sufficient load capacity and adjustment range. It can provide stable fastening force to meet the welding requirements of thick steel plates, and can flexibly adjust the height of the pressure block according to different scenarios to ensure effective fastening in the welding of steel box girders of various specifications. 4. This utility model forms a two-way fit assembly relationship by matching the bottom groove of the pressure block with the top of the spiral jack and the top protrusion structure with the outline of the steel plate in the weld area. This ensures that the lifting force is vertically transmitted to the surface of the steel plate, while avoiding local stress concentration and making the fastening force evenly distributed on both sides of the weld, thus reducing the deformation of the steel plate caused by uneven force. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the pressure block of this utility model; Figure 3 This is an installation diagram of the present invention; Figure 4 This is a schematic diagram of the structure of a single steel plate installed on a weld seam according to this utility model.

[0019] Among them, 1-positioning block; 2-jack; 3-pressure block; 4-support base; 5-anti-slip pad; 6-weld. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0021] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0022] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As can be seen, this utility model discloses a steel box girder weld fixing and welding device. This steel box girder weld fixing and welding device mainly consists of a positioning component and a fastening component. The assembly and positional relationship of each component is as follows: The core of the positioning component is a plurality of positioning blocks 1 arranged in an array. These positioning blocks 1 are steel plate metal blocks with arc-shaped grooves. The arc-shaped grooves are used to engage the edges of the steel plates on both sides of the steel box girder weld 6, and are fixed to the edges of the steel plates by welding, thereby achieving the initial positioning of the steel plates on both sides of the weld 6. The number of positioning blocks 1 is not less than 2, and they are spaced apart along the length of the weld 6. The diameter of the arc-shaped groove is adapted to the thickness of the edge of the steel plate, and the inner wall is provided with anti-slip texture. The thickness is 10-20mm to ensure tight engagement and prevent slippage. The fastening assembly includes a screw jack 2, a pressure block 3, a support base 4, and an anti-slip pad 5. The support base 4 is placed on the ground or a construction platform, and the upper surface is provided with the anti-slip pad 5. The bottom of the screw jack 2 is placed on the anti-slip pad 5 of the support base 4. The screw jack 2 is a 20T specification, and the lifting stroke is not less than 10cm. The pressure block 3 is located on top of the screw jack 2. Its bottom is provided with a groove that matches the shape of the top of the screw jack 2, and its top is provided with a protruding structure that matches the surface contour of the steel plate in the weld seam 6 area of ​​the steel box girder. Through the lifting force of the screw jack 2, the protruding structure on the top of the pressure block 3 fits against the surface of the steel plate in the weld seam 6 area, tightly pressing the steel plates on both sides of the weld seam 6 together. In the overall assembly, the positioning component positions and fixes the edge of the steel plate at multiple points along the length of the weld 6, while the fastening component provides stable support in the weld 6 area through the support base 4 and the anti-slip pad 5. The matching structure of the spiral jack 2 and the pressure block 3 ensures that the lifting force is vertically transmitted to the surface of the steel plate. All components work together to ensure the stability and accuracy of the weld 6 during the welding process.

[0023] In one embodiment, refer to Figure 2 and Figure 3As can be seen, the positioning method of this device achieves precise and stable positioning of the steel plates on both sides of the weld through the structured design and assembly relationship of the positioning components. The physical structural characteristics and distribution of the positioning blocks 1 form a rigid constraint on the edge of the steel plate. The positioning components consist of multiple positioning blocks 1 arranged in an array. These positioning blocks 1 are steel plate metal blocks with arc-shaped grooves. The diameter of the arc-shaped grooves is adapted to the thickness of the edge of the steel box girder steel plate, ensuring that the grooves can tightly engage the edge of the steel plate, geometrically restricting the lateral and vertical displacement of the steel plate. There are no fewer than two positioning blocks 1, spaced apart along the length of the weld 6. This multi-point distributed layout can form a uniform positioning constraint on the steel plates on both sides of the weld, avoiding local stress concentration or positioning offset caused by single-point positioning. Simultaneously, through the synergistic effect of multiple positioning points, a positioning reference line is constructed along the extension direction of the weld, ensuring the parallelism and straightness of the steel plate edge and the weld 6. Positioning block 1 is made of a 10-20mm thick steel plate, possessing sufficient structural rigidity to prevent deformation during welding and subsequent welding operations, thus ensuring positioning accuracy. The inner wall of the arc-shaped groove features anti-slip textures, further enhancing friction between the groove and the edge of the steel plate. This prevents relative slippage caused by vibration, external forces, or other factors before or during welding. Combined with the welding process between positioning block 1 and the steel plate edge, this creates a rigid connection between positioning block 1 and the steel plate, permanently locking the initial positional relationship and avoiding the loosening problems common with traditional temporary supports or clamps. This design effectively prevents defects such as weld misalignment and incomplete fusion caused by positioning deviations.

[0024] In one embodiment, refer to Figure 3 and Figure 4As can be seen, the positioning component serves as the foundation of the assembly. Its core component, positioning block 1, first completes the initial fixation of the steel plates on both sides of weld 6. The operator needs to select no less than two steel plate metal blocks with a thickness of 10-20mm as positioning blocks 1 according to the length direction of weld 6. The arc-shaped groove of the positioning block 1 is aligned with the edge of the steel plate on both sides of weld 6 of the steel box girder. By utilizing the compatibility between the diameter of the groove and the thickness of the steel plate edge, the arc-shaped groove is tightly engaged with the edge of the steel plate. At this time, the anti-slip texture on the inner wall of the groove can increase the friction with the edge of the steel plate, initially preventing the positioning block 1 from sliding relative to the steel plate. Subsequently, the positioning block 1 is fixed to the edge of the steel plate through the welding process. The welding points need to be evenly distributed along the edge of the positioning block 1 in contact with the steel plate to ensure that the positioning block 1 and the steel plate form a rigid connection. At this time, multiple positioning blocks 1 spaced apart along the length direction of weld 6 together form a positioning reference line extending along weld 6, which restricts the displacement of the steel plate from the horizontal and vertical directions, and achieves accurate alignment of the initial position of the steel plates on both sides of weld 6. After assembling the positioning components, the fastening components are assembled using the positioned steel plate as a reference: First, place the support base 4 on the ground or construction platform below the weld seam 6 area, ensuring it is flush with the ground. Then, lay the anti-slip pad 5 on the upper surface of the support base 4, utilizing its high coefficient of friction to prevent horizontal displacement of subsequent components under load. Next, place the bottom of the 20T screw jack 2 with a lifting stroke of not less than 10cm on the anti-slip pad 5 of the support base 4, adjusting the initial height of the screw jack 2 so that its top is aligned with the surface of the steel plate in the weld seam 6 area. Then, place the pressure block 3 on top of the screw jack 2, ensuring that the bottom of the pressure block 3 contacts the top of the screw jack 2. At this point, the groove at the bottom of the pressure block 3 matches the shape of the top of the screw jack 2, preventing the pressure block 3 from sliding relative to the jack under load. Simultaneously, the protruding structure on the top of the pressure block 3 must precisely fit the contour of the steel plate surface in the weld seam 6 area, ensuring that the protruding structure forms surface contact with the steel plate surface rather than point contact. Finally, by rotating the adjusting handle of the screw jack 2, its lifting rod extends upward, driving the pressure block 3 to rise synchronously until the protruding structure at the top of the pressure block 3 is tightly attached to the surface of the steel plate in the weld seam 6 area. At this time, the lifting force of the screw jack 2 is transmitted to the steel plate through the pressure block 3, further pressing the steel plates on both sides of the weld seam 6 tightly together. The welding and fixing of the positioning block 1 restricts the reverse displacement of the steel plate caused by the pressing from the edge. After the overall assembly is completed, the positioning block 1 achieves rigid positioning of the edge of the steel plate through the engagement and welding of the arc-shaped slot. The fastening components are assembled in sequence with the support base 4, anti-slip pad 5, screw jack 2, and pressure block 3, which vertically transmit the lifting force to the surface of the steel plate in the weld seam 6 area. The components form an alternating layout of multi-point positioning and multi-group fastening along the length of the weld seam 6 in space, which together constitute an integrated constraint system for positioning and fastening the steel plates on both sides of the weld seam 6, ensuring that the steel plate has no displacement before welding and no separation during welding, ultimately ensuring the fitting accuracy and welding quality of the weld seam 6.

[0025] Working principle: Rigid positioning restricts the displacement of the steel plate, and controllable pressure ensures the fitting accuracy of the weld area. The positioning component, as the basic positioning unit, consists of multiple positioning blocks 1 spaced apart along the length of the weld 6. These positioning blocks 1 are steel plate metal blocks with arc-shaped grooves. The diameter of the arc-shaped grooves is adapted to the thickness of the steel plate edge. In use, the grooves are engaged with the edges of the steel plate on both sides of the weld 6, restricting the lateral misalignment and vertical separation of the steel plate. At the same time, the anti-slip texture on the inner wall of the grooves increases the friction coefficient and prevents relative sliding due to vibration or external force after engagement. Subsequently, the positioning blocks 1 are fixed to the edges of the steel plate through welding, forming a rigid connection between the positioning blocks 1 and the steel plate. The multiple positioning blocks 1 are spaced apart by no less than two, forming a positioning reference line extending along the weld 6, avoiding local offset caused by single-point positioning, and macroscopically ensuring the parallelism and straightness of the steel plate edge and the weld 6. The fastening assembly, acting as a pressure actuation unit, is based on the support base 4 and the anti-slip pad 5. The support base 4 is placed on the ground or construction platform, and the anti-slip pad 5 on the upper surface prevents overall slippage by increasing the coefficient of friction. The 20T screw jack 2, with a lifting stroke of not less than 10cm, is placed on the anti-slip pad 5, and its top is adapted to the groove at the bottom of the pressure block 3 to ensure vertical transmission of the lifting force. The top of the pressure block 3 has a raised structure that adapts to the contour of the steel plate surface in the weld seam 6 area. When the screw jack 2 lifts, the pressure block 3 fits against the steel plate surface through the raised structure, converting the lifting force of the jack into vertical pressure on the steel plate, so that the steel plates on both sides of the weld seam 6 are further pressed tightly together under the constraint of the positioning assembly, forming a gapless welding interface.

[0026] Traditional temporary supports or clamps often rely on manual visual alignment, which can easily lead to steel plate misalignment due to external forces or thermal deformation. This device, however, uses the arc-shaped groove of positioning block 1 and welding fixation to form a rigid positioning constraint. Combined with at least two spaced points, this fundamentally restricts the steel plate's displacement freedom, ensuring that the alignment error of the steel plate edges on both sides of weld 6 is controlled within a minimal range. Traditional clamps often cause localized gaps or excessive compression of the steel plate due to unstable pressure transmission paths. In this device, the matching structure between the bottom groove of pressure block 3 and the top of the jack, and the matching design between the top protrusion and the steel plate contour, ensure that the pressure is applied vertically and evenly. In the weld area, the controllable lifting stroke of the spiral jack 2 is not less than 10cm, and the pressure can be precisely adjusted according to the thickness of the steel plate and the fitting requirements to avoid gaps. Traditional temporary fixing devices are prone to loosening due to welding vibration or thermal stress. However, the positioning block 1 of this device forms a permanent rigid connection with the welded fixing of the steel plate. Combined with the anti-slip design of the support base 4 and the anti-slip pad 5, as well as the surface contact and fitting of the pressure block 3 with the steel plate, a closed-loop stable system of positioning, support and fastening is constructed, which effectively resists the external force interference and thermal deformation during the welding process, and finally achieves a significant improvement in the welding accuracy and quality of the weld 6.

[0027] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A welding device for fixing weld seams of steel box girders, characterized in that, Includes positioning components and fastening components; The positioning component consists of multiple positioning blocks (1) arranged in an array. The positioning block (1) is a metal block with an arc-shaped groove. The arc-shaped groove is used to engage the steel plate edges on both sides of the steel box girder weld (6). The positioning block (1) is welded and fixed to the steel plate edge to achieve preliminary positioning. The fastening assembly includes a screw jack (2) and a pressure block (3). The top of the screw jack (2) is in contact with the bottom of the pressure block (3). The top of the pressure block (3) is used to fit against the surface of the steel plate in the weld (6) area. The lifting force of the screw jack (2) causes the pressure block (3) to press the steel plates on both sides of the weld (6) tightly together.

2. The steel box girder weld fixing and welding device according to claim 1, characterized in that, The diameter of the arc-shaped groove of the positioning block (1) is adapted to the thickness of the edge of the steel plate of the steel box girder, and the number of positioning blocks (1) is not less than 2, which are spaced apart along the length of the weld (6).

3. The steel box girder weld fixing and welding device according to claim 1, characterized in that, The screw jack (2) is a 20T screw jack (2), and its lifting stroke is not less than 10cm.

4. The steel box girder weld fixing and welding device according to claim 1, characterized in that, The bottom of the pressure block (3) is provided with a groove, the shape of which is adapted to the top shape of the spiral jack (2), and the top of the pressure block (3) is provided with a protruding structure, the shape of which is adapted to the surface contour of the steel plate in the weld seam (6) area of ​​the steel box girder.

5. The steel box girder weld fixing and welding device according to claim 1, characterized in that, The positioning block (1) is a steel plate metal block with a thickness of 10-20mm, and the inner wall of the arc-shaped slot is provided with anti-slip texture.

6. The steel box girder weld fixing and welding device according to claim 1, characterized in that, The fastening assembly also includes a support base (4), the bottom of the spiral jack (2) is placed on the support base (4), and the upper surface of the support base (4) is provided with an anti-slip pad (5).

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