An automatic inner welding device for the U-rib end of a bolted U-rib bridge deck panel unit

Abstract

The utility model relates to a kind of automatic inner welding device for bolted U rib bridge deck unit intersegment end U rib, including a pedestal, pedestal includes a pair of upper and lower base plate and intermediate transition block, the pedestal is driven along the long axis direction of U rib reciprocating movement by a walking assembly;A welding assembly placed in U rib, the welding assembly includes a pair of inverted V-shaped distribution welding torch, two welding torch are installed on a welding torch seat, the welding torch seat is driven by a lifting assembly installed on pedestal to approach or away from bridge deck, and the welding torch seat is also driven by a rotating assembly to rotate.The automatic inner welding device in the utility model, through the cooperative matching between pedestal, walking assembly, welding assembly, rotating assembly and lifting assembly, welding torch can be inserted into the inner wall position of U rib, to realize the internal welding of the contact place of U rib and bridge deck, and through the cooperation of the device, combined with the reserved bridge position bridge deck end head swing welding process, ensure the effectiveness of bridge position U rib high-strength bolt connection.

Description

Technical Field

[0001] This utility model relates to the field of U-rib welding, and in particular to an automatic internal welding device for bolting U-rib bridge deck unit inter-section U-ribs. Background Technology

[0002] In recent years, in order to optimize the stress distribution between the U-ribs and the deck panels of bridge deck units, improve the structural fatigue performance, ensure weld quality, and reduce defect risks, U-rib internal welding has been widely used in the welding process of orthotropic steel bridge decks for long-span bridges. However, since U-rib internal welding is an overhead welding process at the bridge site connection and the working space is small, it is not easy to complete the welding. At present, the entire weld of the U-rib is basically completed in one go without leaving a pre-welded end at the bridge site. This may cause phenomena such as lateral misalignment during the bridge site connection. This phenomenon may reduce the effectiveness of the high-strength bolt connection of the U-rib at the bridge site. To avoid this phenomenon, higher requirements are placed on the manufacturing precision of the bridge deck blocks on site. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an automatic internal welding device for the end of the U-rib at the joint of the U-rib bridge deck unit, so as to perform internal welding at the connection between the U-rib and the bridge deck.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a telescopic transport beam, the innovation of which lies in: an automatic internal welding device for realizing the welding between the U-rib and the bridge deck, the automatic internal welding device comprising: A base, the base comprising a pair of upper and lower substrates distributed vertically and an intermediate transition block connecting the two substrates, the base being driven by a traveling assembly to reciprocate along the long axis of the U-rib. A welding assembly placed within a U-rib, the welding assembly comprising a pair of welding torches arranged in an inverted V-shape, the two welding torches being mounted on a welding torch holder, the welding torch holder being driven to move closer to or away from the bridge deck by a lifting assembly mounted on a base, and the welding torch holder being driven to rotate by a rotating assembly.

[0005] Furthermore, the rotating assembly includes a rotating shaft connected to the welding torch holder, which is driven by a servo motor to rotate and drive the welding torch holder to rotate, thereby realizing the rotation of the two welding torches. The lifting assembly includes a vertically arranged lifting screw. A through hole is opened on the base to allow the lifting screw to pass through and move. A screw nut that cooperates with the lifting screw is also installed at the bottom of the lower base plate. The screw nut is driven to rotate by a lifting motor installed on the lower base plate, which drives the lifting screw to move up and down. The top of the lifting screw is connected to a servo motor, which drives the servo motor to move up and down synchronously.

[0006] Furthermore, the walking assembly includes a pair of magnetic walking tracks arranged in parallel at the bottom of the U-rib. The magnetic walking tracks are magnetically attached to the outer wall of the U-rib. A pair of walking shafts arranged in parallel are also installed on the upper base plate. Walking wheels are installed on both sides of the walking shafts, each corresponding to one of the two magnetic walking tracks. The walking shafts are driven to rotate by a stepper motor mounted on the upper base plate, thereby driving the walking wheels to reciprocate along the magnetic walking tracks.

[0007] The advantages of this utility model are as follows: The automatic internal welding device in this utility model, through the coordinated cooperation between the base, the walking component, the welding component, the rotating component and the lifting component, can extend the welding gun into the inner wall of the U-rib to achieve internal welding at the contact point between the U-rib and the bridge deck. Furthermore, through the cooperation of this device, combined with the pre-reserved bridge deck end welding process, the effectiveness of the high-strength bolt connection of the bridge U-rib is ensured.

[0008] The design of the walking components uses a combination of magnetic walking tracks, walking wheels, and walking shafts. The magnetic effect of the magnetic walking tracks allows them to be arbitrarily attached to different U-rib surfaces without the need for other fasteners, making installation convenient. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the automatic internal welding device for the end of the U-rib of the U-rib bridge deck unit for bolting.

[0010] Figure 2 This is a schematic diagram of the practical application of the automatic internal welding device for the U-rib end of the U-rib bridge deck unit segment of this utility model. Detailed Implementation

[0011] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0012] like Figure 1 , Figure 2 The diagram shows an automatic internal welding device 3 for bolting U-ribs at the ends of U-rib bridge deck unit segments. The automatic internal welding device 3 is used to weld the U-rib 1 to the bridge deck 2. The automatic internal welding device 3 includes... A base includes a pair of upper substrates 31 and lower substrates 32 distributed vertically, and an intermediate transition block 33 connected between the two substrates. The upper and lower sides of the intermediate transition block 33 are welded and fixed to the upper substrates 31 and lower substrates 32 respectively. The base is driven by a traveling component to reciprocate along the long axis of the U-rib.

[0013] The walking assembly includes a pair of magnetic walking tracks 36 arranged side by side at the bottom of the U-rib 1. The two magnetic walking tracks 36 are located on both sides of the hand hole at the bottom of the U-rib 1, and the magnetic walking tracks 36 extend along the long axis of the U-rib 1. The magnetic walking tracks 36 are magnetically attracted to the outer wall of the U-rib 1. A pair of walking shafts 37 arranged side by side are also installed on the upper base plate 31. The upper base plate 31 has through holes for the walking shafts 37 to be installed and moved. A bearing is also provided between the walking shafts 37 and the upper base plate 31. The two sides of the walking shafts 37 extend from the two sides of the upper base plate 31, and walking wheels 38 are installed on the two sides of the walking shafts 37 that extend out of the upper base plate 31, which correspond to the two magnetic walking tracks 36. One of the walking shafts 37 is driven to rotate by a stepper motor mounted on the upper base plate 31, thereby driving the walking wheels 38 to reciprocate along the magnetic walking track 37. The design of the walking components uses a combination of magnetic walking track 37, walking wheel 38 and walking shaft 37. Through the magnetic attraction of the magnetic walking track 37, the magnetic walking track 37 can be arbitrarily attached to different U-rib surfaces without the need for other fasteners, making installation convenient.

[0014] A welding assembly is placed inside the U-rib 1. The welding assembly includes a pair of welding torches 310 arranged in an inverted V-shape. The two welding torches 310 are mounted on a welding torch holder 39. The welding torch holder 39 is driven to move closer to or away from the bridge deck 2 by a lifting assembly mounted on a base. The welding torch holder 39 is also driven to rotate by a rotating assembly. The welding torch holder 39 is a U-shaped structure formed by a horizontal plate and inclined plates connected in a V-shape on both sides of the horizontal plate. The two welding torches 310 are respectively mounted on the two inclined plates.

[0015] The rotating assembly includes a rotating shaft connected to the welding torch holder 39. The rotating shaft is driven by a servo motor to rotate, thereby causing the welding torch holder 39 to rotate and thus enabling the two welding torches 310 to rotate.

[0016] The lifting assembly includes a vertically arranged lifting screw 35. Through holes are opened on the upper base plate 31, the lower base plate 32, and the intermediate transition block 33 to allow the lifting screw 35 to pass through and move up and down. A screw nut 34 that cooperates with the lifting screw 35 is also installed at the bottom end of the lower base plate 32. The screw nut 34 is driven to rotate by a lifting motor installed on the lower base plate 32, which drives the lifting screw 35 to move up and down. The top end of the lifting screw 35 is connected to a servo motor, which drives the servo motor to move up and down synchronously, thereby realizing the up and down movement of the entire welding torch holder 39.

[0017] Working principle: First, the two welding torches 310 and the entire welding torch holder 39 are inserted into the narrow space where the U-rib 1 and the inner side of the bridge deck 2 are welded through the hand hole of the U-rib 1. At the same time, the two magnetic travel rails 37 are attracted to the bottom surface of the U-rib 1, completing the assembly of the entire automatic inner welding device 3. At this time, the lifting component is at the minimum feed rate, and the line connecting the two welding torches 310 is perpendicular to the cross-section of the U-rib 1 ring.

[0018] After preparation, the lifting motor operates, driving the lifting screw 35 to move upward, increasing the feed rate, so that the tip of the welding torch 310 touches the bottom. In subsequent practical applications, in order to achieve automatic return of the welding torch 310, a miniature limit switch can be set at the tip of the welding torch 310. This miniature limit switch is connected to a controller. Through the cooperation of the miniature limit switch and the controller, at the moment the tip of the welding torch 310 touches the bottom, the controller adjusts the return value according to the welding current, welding wire material and diameter and other information stored in the controller in advance. The return value is generally 8~20mm. The controller controls the lifting motor to reverse and realize the return.

[0019] After the welding torch 310 bottoms out and returns to its starting position, the servo motor drives the welding torch base 39 to rotate 90°, thereby causing the two welding torches 310 to rotate. This changes the position of the line connecting the two welding torches 310 from being perpendicular to the cross-section of the U-rib 1 ring to being parallel to the cross-section of the U-rib 1 ring. In order to observe the position of the welding torch 310, a camera can be installed on the base to detect the position of the welding torch 310, so that the welding personnel can better observe the position status of the welding torch 310.

[0020] After the welding torch 310 reaches the required position, it is ready to ignite the arc and start welding. Before the arc is ignited, the lifting assembly performs a bottoming-out return operation again, with a return of 2~3mm. At the moment the arc is ignited, it performs a rapid return to 8~20mm. At the same time, the stepper motor drives the walking wheel 38 to move, driving the base to move, thereby driving the welding torch 310 to complete the welding operation between the U rib 1 and the inner side of the bridge panel 2.

[0021] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An automatic internal welding device for bolting U-ribs at the ends of U-ribs in bridge deck panels, characterized in that: An automatic internal welding device is used to weld the U-rib to the bridge deck. The automatic internal welding device includes... A base, the base comprising a pair of upper and lower substrates distributed vertically and an intermediate transition block connecting the two substrates, the base being driven by a traveling assembly to reciprocate along the long axis of the U-rib. A welding assembly placed within a U-rib, the welding assembly comprising a pair of welding torches arranged in an inverted V-shape, the two welding torches being mounted on a welding torch holder, the welding torch holder being driven to move closer to or away from the bridge deck by a lifting assembly mounted on a base, and the welding torch holder being driven to rotate by a rotating assembly.

2. The automatic internal welding device for the end U-ribs of the inter-section of a U-rib bridge deck unit according to claim 1, characterized in that: The rotating assembly includes a rotating shaft connected to the welding torch holder, which is driven by a servo motor to rotate, thereby causing the welding torch holder to rotate and thus realizing the rotation of the two welding torches. The lifting assembly includes a vertically arranged lifting screw. A through hole is opened on the base to allow the lifting screw to pass through and move. A screw nut that cooperates with the lifting screw is also installed at the bottom of the lower base plate. The screw nut is driven to rotate by a lifting motor installed on the lower base plate, which drives the lifting screw to move up and down. The top of the lifting screw is connected to a servo motor, which drives the servo motor to move up and down synchronously.

3. The automatic internal welding device for the end U-ribs of the inter-section of a U-rib bridge deck unit according to claim 1, characterized in that: The walking assembly includes a pair of magnetic walking tracks arranged side by side at the bottom of the U-rib. The magnetic walking tracks are magnetically attached to the outer wall of the U-rib. A pair of walking shafts arranged side by side are also installed on the upper base plate. Walking wheels are installed on both sides of the walking shafts, each corresponding to one of the two magnetic walking tracks. The walking shafts are driven to rotate by a stepper motor mounted on the upper base plate, which in turn drives the walking wheels to reciprocate along the magnetic walking tracks.

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