A mobile welding device for a box girder falsework

Abstract

The present invention discloses a mobile welding device for a box girder formwork support, which includes an installation base and locking components evenly assembled thereon. The locking components are used to position the bottom of the box girder formwork support. The device also includes a gantry traveling vehicle frame assembled on the installation base. The vehicle frame runs along the length direction of the base and is erected around the box girder formwork support. A lifting platform is equipped on the gantry vehicle frame. Two groups of outer positioning components and two groups of inner positioning components are slidably installed on the platform. The inner and outer positioning components are symmetrically arranged and are located on the inner and outer sides of the box girder formwork support respectively. The lifting platform is also equipped with a shunt drive component, which is responsible for transmitting power to the outer positioning and inner positioning components to drive their independent operation. The clamping component includes two groups of symmetrically arranged chucks, which are slidably installed at the bottom of the outer positioning component and run along the width direction of the installation base. This device significantly improves the welding accuracy and efficiency, enhances the stability and reliability of the device, and at the same time reduces the maintenance difficulty by simplifying the power system.

Description

Technical Field

[0001] The present invention relates to the technical field of construction equipment, and specifically relates to a mobile welding device for box girder jigs. Background Art

[0002] In modern engineering construction, box girder jigs are widely used in the construction of large infrastructure projects such as bridges and tunnels. The welding and assembly of box girder jigs is one of the key processes in such projects. Traditional welding methods usually rely on manual positioning, where each component is spliced and welded through manual operation. Although this method is simple to operate, there are many technical problems in actual applications, especially in terms of welding accuracy and efficiency, which are difficult to meet the high requirements of modern construction.

[0003] First of all, the biggest problem with the manual positioning method is poor welding accuracy. Due to relying on manual operation, the positioning error cannot be effectively controlled, resulting in inaccurate fitting between components during the welding and assembly process, thus affecting the quality of the overall structure and even potentially causing construction accidents. In addition, during the manual welding process, the welding quality stability cannot be guaranteed due to differences in the skill levels, experience of the operators, and the working environment.

[0004] Secondly, the traditional manual welding method has the problem of low welding efficiency. Due to the need for a large amount of manual operation, including the positioning, clamping, and welding of each component, the overall construction period is relatively long, and the efficiency cannot meet the requirements of large-scale construction projects. Under high-intensity construction tasks, the efficiency of manual operation further decreases, seriously affecting the project progress and cost control.

[0005] Therefore, with the increasing scale of engineering construction, the demand for automated and high-precision welding equipment has become particularly urgent. In order to overcome the deficiencies in traditional methods, designing dedicated welding equipment has become the key to improving production efficiency and welding quality. This equipment must be able to achieve precise assembly and welding of each component of the box girder jig, which requires the efficient cooperation of multiple operating and positioning components.

[0006] However, when designing such automated welding equipment, multiple technical problems must be considered, especially how to ensure the stable operation of each positioning component and how to avoid interference between different components. Box girder jigs usually have a complex structure and large size, so the positioning components must have a high degree of stability and accuracy. In addition, in actual operation, the mutual cooperation of various positioning and driving components is the key to ensuring the smooth progress of the welding process. If there is interference or instability between the positioning components, it may lead to a decrease in welding accuracy or equipment failure, thereby affecting the overall construction quality.

[0007] Finally, considering the long-term use and maintenance of the equipment, simplifying the power system is also an important direction in the design. A complex power transmission system not only increases the weight and volume of the equipment, but also raises the difficulty and cost of maintenance. How to reduce the complexity of the power system and improve the maintenance efficiency of the equipment while ensuring the efficient operation of the equipment has become an important issue in this technical solution. Summary of the Invention

[0008] Aiming at the above deficiencies existing in the prior art, the purpose of the present invention is to provide a mobile welding device for a beam formwork, which significantly improves the welding accuracy and efficiency, enhances the stability and reliability of the equipment, simplifies the power system at the same time, and reduces the maintenance difficulty.

[0009] The technical solution adopted by the present invention to achieve the above purpose is: a mobile welding device for a box girder formwork, including an installation base and locking components evenly assembled on the installation base, and the locking components lock and position the bottom structure of the box girder formwork.

[0010] It further includes a gantry traveling frame assembled on the installation base and erected around the box girder formwork, and the gantry traveling frame runs along the length direction of the installation base.

[0011] An elevating platform that moves up and down vertically is assembled on the gantry traveling frame. Two groups of outer positioning components and two groups of inner positioning components that run along the width direction of the installation base are slidably installed on the elevating platform. The two groups of outer positioning components and inner positioning components are symmetrically arranged along the midline in the width direction of the installation base, and the inner positioning components and outer positioning components are respectively arranged on the inner and outer sides of the box girder formwork.

[0012] A flow-dividing drive component that is in power connection with both the outer positioning component and the inner positioning component is further assembled on the elevating platform. The power of the flow-dividing drive component is flow-divided and transmitted to the outer positioning component and the inner positioning component, and the flow-dividing drive component drives the outer positioning component and the inner positioning component to operate independently.

[0013] It further includes a clamping component, and the clamping component includes two symmetrically arranged chucks. The two chucks are respectively slidably installed at the bottoms of the two groups of outer positioning components and run along the width direction of the installation base.

[0014] It further includes a welding device assembled on the outer positioning component and the inner positioning component, and the welding device is used for welding and combining the various components of the box girder formwork.

[0015] Based on the above technical solution, in order to ensure that the box girder formwork can accurately position and bind the steel reinforcement cage during the casting of the box girder precast member, the following technical solution is provided.

[0016] The box girder formwork support includes a bottom beam, a support unit, a reinforcing strip, an upper positioning strip, and a lower positioning strip. The bottom beam includes multiple groups that are parallelly distributed and arranged along the length direction of the installation base, and the bottom beam is locked and positioned by a locking component.

[0017] The support units are evenly distributed along the length direction of the bottom beam. The support unit includes a longitudinal beam, a vertical strut, an inclined strut, and a sleeve. The longitudinal beam is welded onto each group of the bottom beams and is perpendicularly distributed to the bottom beam. Vertical struts and inclined struts that are symmetrically distributed are welded to both ends of the longitudinal beam. The inclined strut is arranged inside the vertical strut, and the top ends of the inclined strut and the vertical strut are welded. Multiple groups of sleeves that are evenly arranged in the vertical direction are welded onto the vertical strut and the inclined strut arranged at the same end of the longitudinal beam.

[0018] The reinforcing strip, the upper positioning strip, and the lower positioning strip are all perpendicularly distributed to the longitudinal beam. The reinforcing strip and the upper positioning strip are both welded to the connection at the top ends of the inclined strut and the vertical strut. The upper positioning strip is arranged inside the reinforcing strip. The lower positioning strip is welded to the longitudinal beam. Positioning slots are evenly formed on the upper positioning strip and the lower positioning strip.

[0019] Based on the above technical solution, in order to ensure that the locking component can be stably assembled on the installation base, effectively position each bottom beam, and at the same time facilitate the operation of the locking component, the following technical solution is provided.

[0020] Multiple groups of positioning sinking grooves are formed on the installation base. A positioning pad seat is arranged in the positioning sinking groove. The positioning sinking groove and the positioning pad seat are both arranged along the length direction of the installation base. The bottom beam is arranged on the positioning pad seat.

[0021] The locking component includes a driving shaft, a driving sprocket, and a transmission sprocket and a threaded ejector rod arranged on both sides of each positioning sinking groove. The transmission sprocket is rotatably installed in the installation base. The threaded ejector rod is slidably installed in the installation base and is threadedly connected to the axis of the transmission sprocket. The end of the threaded ejector rod extends into the positioning sinking groove and abuts against the bottom beam. The driving shaft is rotatably installed in the installation base and is arranged along the width direction of the installation base. Multiple groups of driving sprockets that are vertically opposite to each group of transmission sprockets are fixedly connected to the driving shaft. The driving sprocket and the transmission sprocket arranged in the same vertical direction are chain-driven by a chain. A handwheel arranged outside the installation base is fixedly connected to the end of the driving shaft.

[0022] Based on the above technical solution, in order to ensure that the gantry traveling frame can stably travel on the installation base and ensure that the lifting platform can be assembled to the gantry traveling frame in a lifting motion manner, the following technical solution is provided.

[0023] On both sides of the installation base, traveling guide rails A arranged along the length direction of the installation base are assembled. The traveling guide rails A are distributed on both sides of the box girder jig. The bottom of the gantry traveling vehicle frame is assembled with traveling wheels A, and the traveling wheels A are matched with the traveling guide rails A.

[0024] On the gantry traveling vehicle frame, guide columns arranged along the vertical direction are fixedly connected. The two ends of the lifting platform are slidably installed on the guide columns.

[0025] On the basis of the above technical solution, in order to ensure that the outer positioning component and the inner positioning component can be stably assembled and operated on the lifting platform, and to realize the effective positioning of the support unit, the reinforcing strip, the upper positioning strip, and the lower positioning strip, the following technical solution is provided.

[0026] On the lifting platform, traveling guide rails B and traveling guide rails C arranged along the length direction of the installation base are assembled. The traveling guide rails C are arranged inside the traveling guide rails B.

[0027] The outer positioning component includes a first traveling trolley, a connecting bracket A, a positioning bracket A fixedly connected to the connecting bracket A, and an assembly slot. On the first traveling trolley, traveling wheels B adapted to the traveling guide rails B are assembled. The connecting bracket A is fixedly connected to the bottom of the traveling trolley. The positioning bracket A is arranged on the top of the assembly slot and abuts and positions the reinforcing strip. The assembly slot wraps around the periphery of the support unit and abuts and positions the vertical strut and the sleeve.

[0028] The inner positioning component includes a second traveling trolley, a connecting bracket B, and positioning brackets B, C, and D fixedly connected to the connecting bracket B and arranged in sequence from top to bottom. On the second traveling trolley, traveling wheels C adapted to the traveling guide rails C are assembled. The positioning bracket B abuts and positions the upper positioning strip. The positioning bracket C abuts and positions the side wall of the diagonal strut. The positioning bracket D abuts and positions the lower positioning strip.

[0029] On the basis of the above technical solution, in order to ensure that the flow splitting drive component can be stably assembled on the lifting platform and to realize the power connection between the flow splitting drive component and the outer positioning component and the inner positioning component, the following technical solution is provided.

[0030] The shunt drive assembly includes a first drive motor, a reciprocating lead screw A and a reciprocating lead screw B arranged along the width direction of the mounting base. The reciprocating lead screw A is rotatably connected to the first traveling trolley in each of the two outer positioning assemblies. The two reciprocating lead screws A are coaxially fixed through a connecting shaft A. The reciprocating lead screw B is rotatably connected to the second traveling trolley in each of the two inner positioning assemblies. The two reciprocating lead screws B are coaxially fixed through a connecting shaft B. The reciprocating lead screw A and the reciprocating lead screw B are both rotatably installed on the lifting platform. The first drive motor is fixedly installed on the lifting platform and is power-connected to the connecting shaft A and the connecting shaft B.

[0031] Based on the above technical solution, in order to ensure that the first drive motor can achieve shunt transmission of power to drive the independent operation of the connecting shaft A or the connecting shaft B, and then realize the attitude adjustment of the outer positioning assembly and the inner positioning assembly, the following technical solution is provided.

[0032] The shunt drive assembly includes two ratchet mechanisms arranged in a reverse manner. The ratchet mechanism includes an inner ratchet and a pawl that are kept nested and engaged. The inner ratchets in the two ratchet mechanisms are both rotatably installed on the lifting platform and are respectively arranged around the connecting shaft A and the connecting shaft B. The pawls in the two ratchet mechanisms are respectively rotatably installed around the connecting shaft A and the connecting shaft B. Reed pieces that are in contact with the corresponding pawls are assembled on the connecting shaft A and the connecting shaft B. Rotating sprockets are provided on the outer peripheries of the two inner ratchets. The two rotating sprockets are chain-driven through a chain. A transmission bevel gear A is fixedly connected to one of the inner ratchets. A drive bevel gear A that is meshed with the transmission bevel gear A is fixedly connected to the output shaft of the first drive motor.

[0033] Based on the above technical solution, in order to ensure that the chuck in the clamping assembly can slide stably at the bottom of the outer positioning assembly and realize effective clamping and positioning of both ends of the longitudinal beam, the following technical solution is provided.

[0034] A sliding seat that is slidably installed at the bottom of the connecting bracket A is fixedly connected to the chuck. The clamping assembly further includes a second drive motor, a transmission shaft, and an adjusting lead screw. The adjusting lead screw is rotatably installed at the bottom of the connecting bracket A and is threadedly connected to the sliding seat. The transmission shaft is rotatably installed on the connecting bracket and is arranged in the vertical direction. A drive bevel gear B is fixedly connected to the bottom end of the transmission shaft. A transmission bevel gear B that is meshed with the drive bevel gear B is fixedly connected to the end of the adjusting lead screw. The second drive motor is fixedly installed on the lifting platform and is power-connected to the transmission shaft.

[0035] Based on the above technical solution, in order to ensure that the power of the second drive motor can be stably transmitted to the transmission shaft assembled on the outer positioning assembly, and at the same time, no interference will be caused to the power transmission when the outer positioning assembly is running, the following technical solution is provided.

[0036] The clamping assembly further includes two sets of spline shafts and spline sleeves. The spline shafts are rotatably installed on the lifting platform and arranged along the width direction of the installation base. The two sets of spline shafts are coaxially fixed by a connecting shaft C. A driving bevel gear C is fixed on the connecting shaft C. A driving bevel gear C that meshes with the driving bevel gear C is fixed on the output shaft of the second driving motor.

[0037] The spline sleeves are rotatably installed on the first traveling trolley and are slidably inserted into the corresponding spline shafts on one side. A driving bevel gear D is fixed at the end of the spline sleeve. A transmission bevel gear D that meshes with the driving bevel gear D is fixed at the top of the transmission shaft.

[0038] Advantages of the present invention:

[0039] 1. Improve welding accuracy. The cooperation of multiple positioning components, drive systems, clamping components, and locking components can achieve precise positioning and assembly of each component of the box girder jig. Through the cooperation of the outer positioning component and the inner positioning component, the chuck in the clamping component can slide smoothly along the width direction of the installation base and accurately engage with the support unit, thereby ensuring the precise docking of each component during the welding process. It avoids welding deviations caused by manual operation errors and ensures the stability and consistency of welding quality.

[0040] 2. Improve welding efficiency. Compared with traditional manual welding, the automated device of the present invention greatly improves welding efficiency. The system can automatically complete processes such as positioning, clamping, and assembly of each component, reducing manual intervention and operation time. The automated control of the entire welding process not only improves work efficiency but also shortens the construction period of the project and effectively reduces production costs.

[0041] 3. Enhance the stability and reliability of the equipment. Through the precisely controlled shunt drive component, the stable operation of the outer positioning component and the clamping component is ensured, effectively avoiding system instability or failures caused by interference or friction between components, and greatly improving the reliability and safety of the system.

[0042] 4. Simplify the power system and reduce the maintenance difficulty. The design of the shunt drive component realizes the adjustment of the running postures of the outer positioning component and the inner positioning component by using a single first driving motor. Through the sliding insertion of the spline shaft and the spline sleeve, the second driving motor can drive the chuck and the sliding seat to be stably adjusted. It avoids redundant power transmission components and complex structures. Such a design not only reduces the overall weight of the system but also greatly simplifies the maintenance and repair of the equipment and reduces the operation and maintenance costs during long-term use.

[0043] In summary, the box girder frame mobile welding device of the present invention successfully solves many problems in the prior art through optimized design and innovative technology, significantly improves welding accuracy and efficiency, enhances the stability and reliability of the equipment, and at the same time simplifies the power system and reduces maintenance difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic structural diagram of the present invention when welding a box beam frame;

[0045] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0046] Figure 3 It is a structural schematic diagram of the box girder frame;

[0047] Figure 4 It is a structural schematic diagram of the support unit in the vector tire frame;

[0048] Figure 5 A schematic diagram of the structure of the locking assembly installed in the mounting base;

[0049] Figure 6 is a detailed schematic diagram of the locking assembly;

[0050] Figure 7 It is a schematic diagram of the structure of the gantry type traveling frame, the lifting platform and the components assembled thereon;

[0051] Figure 8 It is a structural schematic diagram of the lifting platform and the components assembled thereon;

[0052] Figure 9 It is a structural schematic diagram of the matching combination of the shunt drive component, the external positioning component and the internal positioning component;

[0053] Figure 10 It is a structural schematic diagram of the matching combination of the No. 1 drive motor and the ratchet mechanism in the shunt drive assembly;

[0054] Figure 11 It is a schematic diagram of the structure of assembling the clamping component on the external positioning component;

[0055] Figure 12 It is a detailed schematic diagram of the outer positioning component and the inner positioning component;

[0056] Figure 13 It is a structural schematic diagram of the combination of the outer positioning component, the inner positioning component and the box beam frame;

[0057] Figure 14 It is a schematic diagram of the structure of the welding equipment installed on the outer positioning component and the inner positioning component;

[0058] Figure 15 It is a schematic structural diagram of a welding device.

[0059] In the figure:

[0060] 1 Installation base, 11 Positioning sinking groove, 12 Positioning pad base, 13 Travel guide rail A;

[0061] 2 Locking assembly, 21 Driving shaft, 211 Handwheel, 22 Driving sprocket, 23 Transmission sprocket, 24 Threaded ejector rod, 241 Guide sinking groove;

[0062] 3 Gantry type traveling vehicle frame, 31 Traveling wheel A, 32 Guide post;

[0063] 4 Lifting platform, 41 Travel guide rail B, 42 Travel guide rail C;

[0064] 5 External positioning assembly, 51 First traveling trolley, 511 Traveling wheel B, 512 First rotary joint seat, 52 Connecting bracket A, 521 Guide rod, 53 Positioning bracket A, 54 Assembly card slot;

[0065] 6 Internal positioning assembly, 61 Second traveling trolley, 611 Traveling wheel C, 612 Second rotary joint seat, 62 Connecting bracket B, 63 Positioning bracket B, 64 Positioning bracket C, 65 Positioning bracket D;

[0066] 7 Shunt drive assembly, 71 First drive motor, 711 Drive bevel gear A, 72 Reciprocating lead screw A, 721 Connecting shaft A, 73 Reciprocating lead screw B, 731 Connecting shaft B, 74 Ratchet mechanism, 741 Inner ratchet, 742 Pawl, 743 Reed, 744 Rotating sprocket, 745 Drive bevel gear A;

[0067] 8 Clamping assembly, 81 Chuck, 811 Sliding seat, 82 Second drive motor, 821 Drive bevel gear C, 83 Transmission shaft, 831 Drive bevel gear B, 832 Transmission bevel gear D, 84 Adjusting lead screw, 841 Transmission bevel gear B, 85 Spline shaft, 851 Connecting shaft C, 852 Transmission bevel gear C, 86 Spline sleeve, 861 Drive bevel gear D;

[0068] 9 Box girder jig, 91 Bottom beam, 92 Support unit, 921 Longitudinal beam, 922 Vertical support rod, 923 Diagonal support rod, 924 Sleeve, 93 Reinforcement bar, 941 Upper positioning bar, 942 Lower positioning bar, 943 Positioning card slot;

[0069] 10 Welding device, 101 Robot arm, 102 Welding torch. Specific implementation mode

[0070] 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. Embodiment

[0071] Please refer to Figures 1-6 and Figure 15 , a mobile welding device for a box girder formwork support, comprising an installation base 1 and locking components 2 evenly assembled on the installation base 1, and the locking components 2 lock and position the bottom structure of the box girder formwork support 9.

[0072] It further includes a gantry traveling frame 3 assembled on the installation base 1 and erected around the box girder formwork support 9, and the gantry traveling frame 3 runs along the length direction of the installation base 1.

[0073] On the gantry traveling frame 3, a lifting platform 4 is assembled to move up and down in the vertical direction. On the lifting platform 4, two groups of outer positioning components 5 and inner positioning components 6 that move along the width direction of the installation base 1 are slidably installed. The two groups of outer positioning components 5 and inner positioning components 6 are symmetrically arranged along the midline in the width direction of the installation base 1, and the inner positioning components 6 and outer positioning components 5 are respectively arranged on the inner and outer sides of the box girder formwork support 9.

[0074] The lifting platform 4 is further assembled with a shunt drive component 7 that is in power connection with both the outer positioning component 5 and the inner positioning component 6. The power of the shunt drive component 7 is shunted and transmitted to the outer positioning component 5 and the inner positioning component 6, and the shunt drive component 7 drives the outer positioning component 5 and the inner positioning component 6 to operate independently.

[0075] It further includes a clamping component 8, and the clamping component 8 includes two groups of symmetrically arranged chucks 81. The two groups of chucks 81 are respectively slidably installed at the bottoms of the two groups of outer positioning components 5 and move along the width direction of the installation base 1.

[0076] It further includes a welding device 10 assembled on the outer positioning component 5 and the inner positioning component 6, and the welding device 10 is used for welding and combining the various components of the box girder formwork support (9).

[0077] The welding device 10 specifically includes a robotic arm 101 and a welding torch 102 assembled on the robotic arm 101. The robotic arm 101 is used to adjust the position and inclination attitude of the welding torch 102, so as to ensure that the welding torch 102 can accurately weld the joints of the various components in the box girder formwork support 9.

[0078] The cooperation between the installation base 1 and the locking components 2 can lock and position the bottom structure of the box girder formwork support 9, so as to achieve accurate and stable welding of the various structures of the box girder formwork support 9 and effectively fix the box girder formwork support 9 processed into finished or semi-finished products.

[0079] Meanwhile, the installation of the base 1 can ensure that the gantry traveling frame 3 travels stably along its own length direction thereon, and cooperate with the components assembled on the traveling frame to achieve effective welding of each structure of the box girder frame. By controlling the coordinated operation of the outer positioning assembly 5, the inner positioning assembly 6, and the clamping assembly 8, precise positioning of the components of the box girder jig 9 except the bottom structure can be achieved, and the welding combination of each component can be realized. The lifting platform 4 can drive the components of the welding combination to adjust the lifting posture so as to assemble and weld with the bottom structure.

[0080] To ensure that the box girder jig 9 can accurately position and bind the steel reinforcement cage during the casting of the box girder precast member, the following technical solutions are provided.

[0081] The box girder jig 9 includes a bottom beam 91, a support unit 92, a reinforcing strip 93, an upper positioning strip 941, and a lower positioning strip 942. The bottom beam 91 includes multiple groups that are parallelly distributed and arranged along the length direction of the installation base 1, and the bottom beam 91 is locked and positioned by the locking assembly 2.

[0082] The support units 92 are evenly distributed along the length direction of the bottom beam 91. The support unit 92 includes a longitudinal beam 921, a vertical strut 922, an inclined strut 923, and a sleeve 924. The longitudinal beam 921 is welded onto each group of bottom beams 91 and is vertically distributed with respect to the bottom beam 91. Vertical struts 922 and inclined struts 923 that are symmetrically distributed are welded to both ends of the longitudinal beam 921. The inclined strut 923 is arranged inside the vertical strut 922, and the top ends of the inclined strut 923 and the vertical strut 922 are welded. Multiple groups of sleeves 924 that are evenly arranged in the vertical direction are welded onto the vertical strut 922 and the inclined strut 923 at the same end of the longitudinal beam 921.

[0083] The reinforcing strip 93, the upper positioning strip 941, and the lower positioning strip 942 are all vertically distributed with respect to the longitudinal beam 921. The reinforcing strip 93 and the upper positioning strip 941 are both welded to the connection at the top ends of the inclined strut 923 and the vertical strut 922. The upper positioning strip 941 is arranged inside the reinforcing strip 93. The lower positioning strip 942 is welded to the longitudinal beam 921. Positioning slots 943 are evenly opened on the upper positioning strip 941 and the lower positioning strip 942.

[0084] The bottom beam 91, and the longitudinal beam 921, the vertical strut 922, and the inclined strut 923 in the support unit 92 are all processed from channel steel to ensure the overall structural strength of the box girder jig 9, while the sleeve 924 in the support unit 92 is processed from round pipe. The inner end of the sleeve 924 is cut along the arrangement direction of the inclined strut 923 to prevent the sleeve 924 from extending inside the box girder jig 9 and affecting the normal assembly and binding work of the steel reinforcement cage.

[0085] A steel bar with a slidable insertion and moving length in the casing 924, so that the steel bars distributed along the length direction of the abdominal part of the box girder and the preset corrugated pipes in the box girder can be erected and positioned thereon to ensure the accuracy of its assembly and splicing.

[0086] The reinforcing strip 93, the upper positioning strip 941, and the lower positioning strip 942 are all processed from angle steel and act together with the bottom beam 91 at the bottom to effectively reinforce each support unit 92. The positioning card slots 943 provided on the upper positioning strip 941 and the lower positioning strip 942 can be cut on the angle steel with a angle grinder.

[0087] The upper positioning strip 941 and the lower positioning strip 942 can accurately position the steel bars longitudinally distributed in the box girder to ensure their uniform arrangement and accurate splicing.

[0088] Two sets of lifting platforms 4 distributed along the length direction of the installation base 1 are assembled on the gantry traveling frame 3. Each lifting platform 4 is equipped with an outer positioning component 5, an inner positioning component 6, a shunt driving component 7, and a clamping component 8. When the gantry traveling frame 3 runs to the next welding station, it can weld and combine the two sets of support units 92 on the bottom beam 91, and realize the arrangement and welding of the reinforcing strip 93, the upper positioning strip 941, and the lower positioning strip 942 on the support unit 92, which can ensure the effective welding of each section of the reinforcing strip 93, the upper positioning strip 941, and the lower positioning strip 942, and avoid the problem of the end sagging due to its excessive length.

[0089] Due to the large size of the box girder, the bottom beam 91, the reinforcing strip 93, the upper positioning strip 941, and the lower positioning strip 942 are all spliced and welded in multiple sections. After the support unit 92 is welded to the bottom beam 91, each section of the reinforcing strip 93, the upper positioning strip 941, and the lower positioning strip 942 is erected and welded and combined on the two sets of support units 92 welded synchronously.

[0090] The cooperation between the outer positioning component 5 and the inner positioning component 6 can accurately position the support unit 92 and the reinforcing strip 93, the upper positioning strip 941, and the lower positioning strip 942. The clamping component 8 can effectively clamp the support unit 92 welded into a whole or the longitudinal beam 921 in the support unit 92. Specifically, the clamping heads 81 are nested and combined at both ends of the longitudinal beam 921 to realize clamping, and cooperate with the lifting platform 4 to drive the support unit 92 or the single longitudinal beam 921 therein to move downward and be spliced with the bottom beam 91.

[0091] After the components in the support unit 92 are welded into a unified whole on the outer positioning assembly 5, inner positioning assembly 6, and clamping assembly 8 at a high position driven by the lifting platform 4, the lifting platform 4 drives them to run to a low position and welds and combines them with the bottom beam 91. Separating the welding work of the structures in the support unit 92 from the welding combination of the support unit 92 and the bottom beam 91 can effectively improve the welding efficiency of the box girder jig 9. The longitudinal beam 921 can also be clamped by the clamping assembly 8 and driven by the lifting platform 4 to run to a low position. First, it is welded to the bottom beam 91, and then the remaining structures of the support unit 92 are welded on the welded longitudinal beam 921. Embodiment

[0092] Please refer to Figures 5-6 , to ensure that the locking component 2 can be stably assembled on the installation base 1, achieve effective positioning of each bottom beam 91, and facilitate the operation of the locking component 2, the following technical solutions are provided for this.

[0093] Multiple groups of positioning sink grooves 11 are provided on the installation base 1. A positioning pad seat 12 is provided in the positioning sink grooves 11. The positioning sink grooves 11 and the positioning pad seat 12 are both arranged along the length direction of the installation base 1. The bottom beam 91 is arranged on the positioning pad seat 12.

[0094] The locking component 2 includes a driving shaft 21, a driving sprocket 22, and transmission sprockets 23 and threaded ejector rods 24 arranged on both sides of each positioning sink groove 11. The transmission sprockets 23 are rotatably installed in the installation base 1. The threaded ejector rods 24 are slidably installed in the installation base 1 and are threadedly connected to the axis of the transmission sprockets 23. The end of the threaded ejector rod 24 extends into the positioning sink groove 11 and abuts against the bottom beam 91. The driving shaft 21 is rotatably installed in the installation base 1 and is arranged along the width direction of the installation base 1. Multiple groups of driving sprockets 22 that are vertically opposite to each group of transmission sprockets 23 are fixedly connected to the driving shaft 21. The driving sprockets 22 and the transmission sprockets 23 arranged in the same vertical direction are chain-driven through a chain. A handwheel 211 arranged outside the installation base 1 is fixedly connected to the end of the driving shaft 21.

[0095] An assembly cavity is provided in the installation base 1 to ensure the stable assembly of the driving sprocket 22, transmission sprocket 23, threaded ejector rod 24, and chain in the locking component 2. When the handwheel 211 is operated to drive the driving shaft 21 and the driving sprockets 22 thereon to rotate synchronously, the chain can drive each group of transmission sprockets 23 to rotate synchronously. The spiral directions of the threaded grooves of the threaded ejector rods 24 arranged on both sides of the positioning sink groove 11 are opposite. An axially arranged guiding sink groove 241 is provided on the side wall of the threaded ejector rod 24. The guiding sink groove 241 is slidably inserted into the installation base 1 to ensure that the threaded ejector rods 24 on both sides of the positioning sink groove 11 always slide in the same direction, so as to realize the clamping and positioning of both side walls of the bottom beam 91.

[0096] A plurality of locking components are evenly distributed along the mounting base 1, which can effectively position each section of the bottom beam 91 assembled and welded to ensure the precise welding process of the box girder jig 9. Embodiment

[0097] Please refer to Figures 1-2 and Figure 7 . To ensure that the gantry traveling frame 3 can travel stably on the mounting base 1 and the lifting platform 4 can be assembled to the gantry traveling frame 3 in a lifting motion, the following technical solutions are provided.

[0098] On both sides of the mounting base 1, traveling guide rails A13 arranged along the length direction of the mounting base 1 are assembled. The traveling guide rails A13 are distributed on both sides of the box girder jig 9. The bottom of the gantry traveling frame 3 is assembled with traveling wheels A31, and the traveling wheels A31 are combined with the traveling guide rails A13.

[0099] The cooperation between the traveling guide rails A13 and the traveling wheels A31 can realize the stable traveling of the gantry traveling frame 3 along the mounting base 1. The gantry traveling frame 3 can be equipped with traction equipment or traveling equipment, which can provide driving force for the gantry traveling frame 3 during its operation.

[0100] On the gantry traveling frame 3, a guide post 32 arranged in the vertical direction is fixedly connected. The two ends of the lifting platform 4 are slidably installed on the guide post 32.

[0101] The cooperation between the guide post 32 and the lifting platform 4 can realize the stable lifting of the lifting platform 4 in the vertical direction. On the gantry traveling frame 3, a winch or screw lifting equipment combined with the lifting platform 4 can be assembled to drive the effective lifting of the lifting platform 4. Embodiment

[0102] Please refer to Figures 7-10 and Figures 12-15 . To ensure that the outer positioning component 5 and the inner positioning component 6 can be stably assembled and operated on the lifting platform 4 and effectively position the support unit 92, the reinforcement strip 93, the upper positioning strip 941, and the lower positioning strip 942, the following technical solutions are provided.

[0103] On the lifting platform 4, traveling guide rails B41 and traveling guide rails C42 arranged along the length direction of the mounting base 1 are assembled. The traveling guide rails C42 are arranged inside the traveling guide rails B41.

[0104] The outer positioning component 5 includes a first traveling trolley 51, a connecting bracket A52, a positioning bracket A53 fixedly connected to the connecting bracket A52, and an assembly slot 54. A traveling wheel B511 adapted to the traveling guide rail B41 is assembled on the first traveling trolley 51. The connecting bracket A52 is fixedly connected to the bottom of the traveling trolley. The positioning bracket A53 is arranged on the top of the assembly slot 54 and abuts and positions the reinforcing strip 93. The assembly slot 54 wraps around the periphery of the support unit 92 and abuts and positions the vertical strut 922 and the sleeve 924.

[0105] The combination of the traveling wheel B511 and the traveling guide rail B41 can ensure the stable traveling of the first traveling trolley 51 in the outer positioning component 5 on the lifting platform 4. The setting of the connecting bracket A52 can ensure the stable assembly of the positioning bracket A53 and the assembly slot 54 on the first traveling trolley 51. The assembly slot 54 is assembled and welded by channel steel and angle steel. The vertical strut 922 is placed therein for effective positioning, and the horizontally arranged multi-layer angle steel can effectively position each sleeve 924 to ensure the stable welding of the sleeve 924 on the vertical strut 922 and the diagonal strut 923. The side of the assembly slot facing the diagonal strut 923 is designed to be open to avoid spatial movement interference with the diagonal strut 923.

[0106] There are two sections on the part of the positioning bracket A53 that fits and abuts against the reinforcing strip 93, and they are respectively arranged on both sides of the assembly slot, which can make way for the connection position between the reinforcing strip 93 and the support unit 92 and facilitate the welding combination of the two. With the combined action of the positioning bracket A53 and the vertical strut 922, the reinforcing strip 93 can be accurately positioned.

[0107] The inner positioning component 6 includes a second traveling trolley 61, a connecting bracket B62, and a positioning bracket B63, a positioning bracket C64, and a positioning bracket D65 that are fixedly connected to the above and arranged in sequence from top to bottom. A traveling wheel C611 adapted to the traveling guide rail C42 is assembled on the second traveling trolley 61. The positioning bracket B63 abuts and positions the upper positioning strip 941. The positioning bracket C64 abuts and positions the side wall of the diagonal strut 923. The positioning bracket D65 abuts and positions the lower positioning strip 942.

[0108] The combination of the traveling wheel C611 and the traveling guide rail C42 can ensure the stable traveling of the second traveling trolley 61 in the inner positioning component 6 on the lifting platform 4. The setting of the connecting bracket B62 can ensure the stable assembly of the positioning bracket B63, the positioning bracket C64, and the positioning bracket D65 on the second traveling trolley 61, and they are all assembled and welded by channel steel.

[0109] The positioning bracket C64 fits and abuts against the side wall of the diagonal strut 923. Together with the assembly slot 54, it can weld the vertical strut 922, the diagonal strut 923, and the sleeve 924 into a unified whole and weld and fix them to the longitudinal beam 921 at the bottom.

[0110] Both the parts of the positioning bracket B63 and the positioning bracket D65 that are in contact and abutted with the upper positioning strip 941 and the lower positioning strip 942 are provided with two sections, and are respectively arranged on both sides of the positioning bracket C64, which can leave the connection positions of the support unit 92 with the upper positioning strip 941 and the lower positioning strip 942, facilitating welding them to the support unit 92.

[0111] The robotic arm 101 in the welding device 10 is fixedly installed on the connecting bracket A52 of the outer positioning assembly 5 or the connecting bracket B62 of the inner positioning assembly 6 to ensure that the robotic arm 101 can cooperate with the welding torch 102 assembled thereon to accurately weld the connection positions of the various components in the box girder jig 9.

[0112] It should also be noted that since the structure of the box girder jig 9 is relatively complex, and the welding points are numerous and scattered, when the welding device 10 welds the box girder jig 9, manual welding torches can also be used to weld and combine each part. Personnel can move on the outside of the gantry traveling frame 3 and the inside of the box girder jig 9, and weld and combine each welding point through the welding torch.

[0113] To ensure that the flow splitting drive assembly 7 can be stably assembled on the lifting platform 4 and achieve the power connection between the flow splitting drive assembly 7 and the outer positioning assembly 5 and the inner positioning assembly 6, the following technical solutions are provided.

[0114] The flow splitting drive assembly 7 includes a first drive motor 71 and a reciprocating lead screw A72 and a reciprocating lead screw B73 arranged along the width direction of the mounting base 1. The reciprocating lead screw A72 is rotatably connected to the first traveling car 51 in each of the two groups of outer positioning assemblies 5, and the two groups of reciprocating lead screws A72 are coaxially fixed through a connecting shaft A721. The reciprocating lead screw B73 is rotatably connected to the second traveling car 61 in each of the two groups of inner positioning assemblies 6, and the two groups of reciprocating lead screws B73 are coaxially fixed through a connecting shaft B731. The reciprocating lead screw A72 and the reciprocating lead screw B73 are both rotatably installed on the lifting platform 4, and the first drive motor 71 is fixedly installed on the lifting platform 4 and is power-connected to the connecting shaft A721 and the connecting shaft B731.

[0115] When the first drive motor 71 operates, it can drive the connecting shaft A721 or the connecting shaft B731 to rotate, and then drive the corresponding reciprocating lead screw A72 or the reciprocating lead screw B73 to rotate stably. The reciprocating lead screws A72 arranged on both sides of the connecting shaft A721 are arranged in opposite directions, and the reciprocating lead screws B73 arranged on both sides of the connecting shaft B731 are also arranged in opposite directions, so as to realize that the two groups of first traveling cars 51 or the two groups of second cars always rotate at the same speed in opposite directions.

[0116] A first traveling trolley 51 and a second traveling trolley 61 are respectively fixedly connected with a first rotary joint seat 512 and a second rotary joint seat 612. The first rotary joint seat 512 can be matched with a reciprocating lead screw A 72, and the second rotary joint seat 612 can be matched with a reciprocating lead screw B 73 to drive the first traveling trolley 51 and the second traveling trolley 61 to travel stably.

[0117] Two sections of spiral guide grooves that are closed at the head and tail are provided on the first reciprocating lead screw and the second reciprocating lead screw. This structural feature can drive the first traveling trolley 51 and the second traveling trolley 61 to perform periodic reciprocating operations within a specific stroke range during their unidirectional continuous operation.

[0118] To ensure that the first driving motor 71 can achieve shunt transmission of power to drive the connecting shaft A 721 or the connecting shaft B 731 to rotate independently, thereby realizing the attitude adjustment of the outer positioning assembly 5 and the inner positioning assembly 6, the following technical solutions are provided.

[0119] The shunt driving assembly 7 includes two sets of ratchet mechanisms 74 arranged in reverse. The ratchet mechanism 74 includes an inner ratchet 741 and a pawl that are nested and engaged. The inner ratchets 741 in the two sets of ratchet mechanisms 74 are all rotatably installed on the lifting platform 4 and are respectively arranged around the connecting shaft A 721 and the connecting shaft B 731. The pawls 742 in the two sets of ratchet mechanisms 74 are respectively rotatably installed around the connecting shaft A 721 and the connecting shaft B 731. Spring pieces 743 that are in contact with the corresponding pawls 742 are assembled on the connecting shaft A 721 and the connecting shaft B 731. Rotating sprockets 744 are provided on the outer circumferences of the two sets of inner ratchets 741. The two sets of rotating sprockets 744 are chain-driven through a chain. A transmission bevel gear A 745 is fixedly connected to the outer circumference of one of the inner ratchets 741, and a driving bevel gear A 711 that is meshed with the transmission bevel gear A 745 is fixedly connected to the output shaft of the first driving motor 71.

[0120] The setting of the spring piece 743 in the ratchet mechanism 74 can push the pawl 742 to always expand outwards and engage with the ratchet teeth on the inner side of the corresponding inner ratchet 741.

[0121] When the first driving motor 71 operates, the corresponding inner ratchet 741 is stably driven through the combination of the driving bevel gear A 711 and the transmission bevel gear A 745, and then the two sets of inner ratchets 741 are driven to rotate synchronously through the combination of the rotating sprocket 744 and the chain.

[0122] Since the two sets of ratchet mechanisms 74 are arranged in reverse, when the driving motor rotates forward, the power of one of the ratchet mechanisms 74 can be individually transmitted to the corresponding pawl 742, and then the power is transmitted to the connecting shaft A721 to drive the two reciprocating lead screws A72 to operate stably, driving the two outer positioning components 5 to reciprocate within a specific stroke range. When the two outer positioning components 5 run to the inner end of the stroke, the positioning brackets A53 and assembly slots 54 thereon can be matched with the box girder jig 9. When running to the outer end of the stroke, the positioning brackets A53 and assembly slots 54 can be completely separated from the box girder jig 9.

[0123] When the driving motor rotates in reverse, the power of the other set of ratchet mechanisms 74 can be individually transmitted to the corresponding pawl 742, and then the power is transmitted to the connected shaft B731 to drive the two reciprocating lead screws B73 to operate stably, driving the two inner positioning components 6 to reciprocate within a specific stroke range. When the two inner positioning components 6 run to the outer end of the stroke, the inner positioning components 6 can be matched with the box girder jig 9. When running to the inner end of the stroke, the inner positioning components 6 can be completely separated from the box girder jig 9. Embodiment

[0124] Please refer to Figure 8 、 Figure 11 In order to ensure that the chuck 81 in the clamping assembly 8 can slide stably at the bottom of the outer positioning component 5 and effectively clamp and position both ends of the longitudinal beam 921, the following technical solutions are provided.

[0125] A sliding seat 811 is fixedly connected to the chuck 81 and slidably installed at the bottom of the connecting bracket A52; the clamping assembly 8 further includes a second driving motor 82, a transmission shaft 83, and an adjusting lead screw 84. The adjusting lead screw 84 is rotatably installed at the bottom of the connecting bracket A52 and is threadedly connected to the sliding seat 811. The transmission shaft 83 is rotatably installed on the connecting bracket and is arranged in the vertical direction. A driving bevel gear B831 is fixedly connected to the bottom end of the transmission shaft 83, and a transmission bevel gear B841 meshing with the driving bevel gear B831 is fixedly connected to the end of the adjusting lead screw 84. The second driving motor 82 is fixedly installed on the lifting platform 4 and is power-connected to the transmission shaft 83.

[0126] A guide rod 521 arranged along the width direction of the installation base 1 is fixedly connected to the bottom of the connecting bracket A52. The guide rod 521 is slidably inserted into the sliding seat 811 to enable the sliding seat 811 and the chuck 81 to slide effectively along the width direction of the installation base 1.

[0127] When the second driving motor 82 operates, it drives the transmission shaft 83 assembled on the two groups of outer positioning components 5 to rotate stably. Furthermore, through the combination of the driving bevel gear B831 and the transmission bevel gear B841, it drives the corresponding two groups of adjusting lead screws 84 to rotate stably, and then drives the corresponding sliding seats 811 and chucks 81 to slide stably. When the chuck 81 extends out of the inner side of the connecting bracket A52, it can be nested and clamped with the longitudinal beam 921 in the support unit 92, thereby realizing the clamping and positioning of the support unit 92.

[0128] To ensure that the power of the second driving motor 82 can be stably transmitted to the transmission shaft 83 assembled on the outer positioning component 5, and at the same time, it will not interfere with the power transmission when the outer positioning component 5 is operating, the following technical solutions are provided for this.

[0129] The clamping component 8 further includes two groups of spline shafts 85 and spline sleeves 86. The spline shafts 85 are rotatably installed on the lifting platform 4 and are arranged along the width direction of the installation base 1. The two groups of spline shafts 85 are coaxially fixed by a connecting shaft C851. A transmission bevel gear C852 is fixed on the connecting shaft C851. A driving bevel gear C821 that meshes with the transmission bevel gear C852 is fixed on the output shaft of the second driving motor 82.

[0130] The spline sleeve 86 is rotatably installed on the first traveling trolley 51 and is slidably inserted with the corresponding spline shaft 85 on one side. A driving bevel gear D861 is fixed at the end of the spline sleeve 86. A transmission bevel gear D832 that meshes with the driving bevel gear D861 is fixed at the top of the transmission shaft 83.

[0131] The connecting shaft C851 penetrates through the second traveling trolley 61 to avoid spatial movement interference between the two. The power of the second driving motor 82 drives the connecting shaft C851 and the two groups of spline shafts 85 to rotate stably through the combination of the driving bevel gear C821 and the transmission bevel gear C852. During the operation of the first traveling trolley 51, the spline sleeve 86 is always slidably inserted with the corresponding spline shaft 85, thereby stably transmitting the power of the spline shaft 85 to the spline sleeve 86. Through the combination of the driving bevel gear D861 and the transmission bevel gear D832, it drives the transmission shaft 83 to rotate stably, thereby transmitting the power to the adjusting lead screw 84 and driving the sliding seat 811 and the chuck 81 to operate stably.

[0132] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0133] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mobile welding device for a box girder falsework, characterized in that: It includes an installation base (1) and locking components (2) evenly assembled on the installation base (1), and the locking components (2) lock and position the bottom structure of the box girder formwork (9). It further includes a gantry traveling frame (3) assembled on the installation base (1) and erected around the box girder formwork (9), and the gantry traveling frame (3) runs along the length direction of the installation base (1). An elevating platform (4) that moves up and down in the vertical direction is assembled on the gantry traveling frame (3). Two groups of outer positioning components (5) and inner positioning components (6) that run along the width direction of the installation base (1) are slidably installed on the elevating platform (4). The two groups of outer positioning components (5) and inner positioning components (6) are symmetrically arranged along the midline in the width direction of the installation base (1), and the inner positioning components (6) and outer positioning components (5) are respectively arranged on the inner and outer sides of the box girder formwork (9). A flow - dividing drive component (7) that is in power connection with both the outer positioning component (5) and the inner positioning component (6) is also assembled on the elevating platform (4). The power of the flow - dividing drive component (7) is split and transmitted to the outer positioning component (5) and the inner positioning component (6), and the flow - dividing drive component (7) drives the outer positioning component (5) and the inner positioning component (6) to run independently. It further includes a clamping component (8). The clamping component (8) includes two groups of symmetrically arranged chucks (81), and the two groups of chucks (81) are respectively slidably installed at the bottoms of the two groups of outer positioning components (5) and run along the width direction of the installation base (1). It further includes welding equipment (10) assembled on the outer positioning component (5) and the inner positioning component (6), and the welding equipment (10) is used for welding and combining the various components of the box girder formwork (9). The outer positioning component (5) includes a first traveling trolley (51), a connecting bracket A (52), a positioning bracket A (53) fixed to the connecting bracket A (52), and an assembly slot (54); the inner positioning component (6) includes a second traveling trolley (61), a connecting bracket B (62), and a positioning bracket B (63), a positioning bracket C (64), and a positioning bracket D (65) that are fixedly connected to the connecting bracket B and arranged in sequence from top to bottom. The shunt drive assembly (7) includes a first drive motor (71), a reciprocating lead screw A (72), and a reciprocating lead screw B (73) arranged along the width direction of the mounting base (1). The reciprocating lead screw A (72) is rotatably connected to the first traveling trolley (51) in each of the two groups of outer positioning assemblies (5). The two groups of reciprocating lead screws A (72) are coaxially fixed through a connecting shaft A (721). The reciprocating lead screw B (73) is rotatably connected to the second traveling trolley (61) in each of the two groups of inner positioning assemblies (6). The two groups of reciprocating lead screws B (73) are coaxially fixed through a connecting shaft B (731). The reciprocating lead screw A (72) and the reciprocating lead screw B (73) are both rotatably mounted on the lifting platform (4). The first drive motor (71) is fixedly mounted on the lifting platform (4) and is power-connected to the connecting shaft A (721) and the connecting shaft B (731).

2. The mobile welding equipment for a box girder formwork support according to claim 1, characterized in that: The box girder falsework (9) includes a bottom beam (91), a support unit (92), a reinforcing strip (93), an upper positioning strip (941), and a lower positioning strip (942). The bottom beam (91) includes multiple groups arranged in parallel and along the length direction of the mounting base (1). The bottom beam (91) is locked and positioned by a locking assembly (2). The support unit (92) is evenly distributed along the length direction of the bottom beam (91). The support unit (92) includes a longitudinal beam (921), a vertical strut (922), an inclined strut (923), and a sleeve (924). The longitudinal beam (921) is welded to each group of the bottom beams (91) and is vertically distributed with respect to the bottom beam (91). Vertical struts (922) and inclined struts (923) are symmetrically welded at both ends of the longitudinal beam (921). The inclined strut (923) is arranged inside the vertical strut (922), and the tops of the inclined strut (923) and the vertical strut (922) are welded. Multiple groups of sleeves (924) are welded on the vertical strut (922) and the inclined strut (923) at the same end of the longitudinal beam (921) and are evenly arranged in the vertical direction. The reinforcing strip (93), the upper positioning strip (941), and the lower positioning strip (942) are all vertically distributed with respect to the longitudinal beam (921). The reinforcing strip (93) and the upper positioning strip (941) are both welded to the top connection of the inclined strut (923) and the vertical strut (922). The upper positioning strip (941) is arranged inside the reinforcing strip (93). The lower positioning strip (942) is welded to the longitudinal beam (921). Positioning slots (943) are evenly formed on the upper positioning strip (941) and the lower positioning strip (942).

3. The mobile welding equipment for a box girder falsework according to claim 2, characterized in that: Multiple positioning sunk grooves (11) are formed on the mounting base (1). A positioning pad seat (12) is provided in the positioning sunk groove (11). The positioning sunk grooves (11) and the positioning pad seats (12) are both arranged along the length direction of the mounting base (1). The bottom beam (91) is arranged on the positioning pad seat (12). The locking component (2) includes a drive shaft (21), a drive sprocket (22), and a transmission sprocket (23) and a threaded ejector rod (24) arranged on both sides of each positioning sink (11). The transmission sprocket (23) is rotatably installed in the installation base (1). The threaded ejector rod (24) is slidably installed in the installation base (1) and is rotatably connected to the axis of the transmission sprocket (23). The end of the threaded ejector rod (24) extends into the positioning sink (11) and abuts against the bottom beam (91). The drive shaft (21) is rotatably installed in the installation base (1) and is arranged along the width direction of the installation base (1). A plurality of groups of drive sprockets (22) that are vertically opposite to each group of transmission sprockets (23) are fixedly connected to the drive shaft (21). The drive sprocket (22) and the transmission sprocket (23) arranged in the same vertical direction are chain-driven by a chain. A handwheel (211) arranged outside the installation base (1) is fixedly connected to the end of the drive shaft (21).

4. The mobile welding equipment for a box girder falsework according to claim 1, characterized in that: Travel guide rails A (13) arranged along the length direction of the installation base (1) are assembled on both sides of the installation base (1). The travel guide rails A (13) are distributed on both sides of the box girder jig (9). Travel wheels A (31) are assembled at the bottom of the gantry travel vehicle frame (3). The travel wheels A (31) are matched with the travel guide rails A (13). Guide columns (32) arranged along the vertical direction are fixedly connected to the gantry travel vehicle frame (3). Both ends of the lifting platform (4) are slidably installed on the guide columns (32).

5. The mobile welding equipment for a box girder falsework according to claim 2, characterized in that: Travel guide rails B (41) and travel guide rails C (42) arranged along the length direction of the installation base (1) are assembled on the lifting platform (4). The travel guide rails C (42) are arranged inside the travel guide rails B (41). Travel wheels B (511) adapted to the travel guide rails B (41) are assembled on the first travel trolley (51). The connecting bracket A (52) is fixedly connected to the bottom of the travel trolley. The positioning bracket A (53) is arranged on the top of the assembly card slot (54) and abuts and positions the reinforcement strip (93). The assembly card slot (54) wraps around the periphery of the support unit (92) and abuts and positions the vertical support rod (922) and the sleeve (924). Travel wheels C (611) adapted to the travel guide rails C (42) are assembled on the second travel trolley (61). The positioning bracket B (63) abuts and positions the upper positioning strip (941). The positioning bracket C (64) abuts and positions the side wall of the diagonal brace (923). The positioning bracket D (65) abuts and positions the lower positioning strip (942).

6. The mobile welding equipment for a box girder falsework according to claim 5, characterized in that: The shunt drive assembly (7) includes two sets of ratchet mechanisms (74) arranged in reverse. The ratchet mechanism (74) includes an internally ratchet (741) and a pawl that are kept nested and engaged. The internally ratchets (741) in the two sets of ratchet mechanisms (74) are rotatably installed on the lifting platform (4) and are respectively arranged around the connecting shaft A (721) and the connecting shaft B (731). The pawls (742) in the two sets of ratchet mechanisms (74) are respectively rotatably installed around the connecting shaft A (721) and the connecting shaft B (731). Reed pieces (743) that are in contact with the corresponding pawls (742) are assembled on the connecting shaft A (721) and the connecting shaft B (731). Rotating sprockets (744) are provided around the two sets of internally ratchets (741). The two rotating sprockets (744) are chain-driven by a chain. A transmission bevel gear A (745) is fixedly connected to one of the internally ratchets (741). A driving bevel gear A (711) that meshes with the transmission bevel gear A (745) is fixedly connected to the output shaft of the first driving motor (71).

7. The mobile welding equipment for a box girder falsework according to claim 5, characterized in that: A sliding seat (811) that is slidably installed at the bottom of the connecting bracket A (52) is fixedly connected to the chuck (81); the clamping assembly (8) further includes a second driving motor (82), a transmission shaft (83), and an adjusting lead screw (84). The adjusting lead screw (84) is rotatably installed at the bottom of the connecting bracket A (52) and is threadedly connected to the sliding seat (811). The transmission shaft (83) is rotatably installed on the connecting bracket and is arranged in the vertical direction. A driving bevel gear B (831) is fixedly connected to the bottom end of the transmission shaft (83). A transmission bevel gear B (841) that meshes with the driving bevel gear B (831) is fixedly connected to the end of the adjusting lead screw (84). The second driving motor (82) is fixedly installed on the lifting platform (4) and is in power connection with the transmission shaft (83).

8. The mobile welding equipment for a box girder falsework according to claim 7, characterized in that: The clamping assembly (8) further includes two sets of spline shafts (85) and spline sleeves (86). The spline shafts (85) are rotatably installed on the lifting platform (4) and are arranged along the width direction of the mounting base (1). The two spline shafts (85) are coaxially fixedly connected by a connecting shaft C (851). A transmission bevel gear C (852) is fixedly connected to the connecting shaft C (851). A driving bevel gear C (821) that meshes with the transmission bevel gear C (852) is fixedly connected to the output shaft of the second driving motor (82); The spline sleeve (86) is rotatably installed on the first traveling trolley (51) and is slidably inserted into the corresponding spline shaft (85). A driving bevel gear D (861) is fixedly connected to the end of the spline sleeve (86). A transmission bevel gear D (832) that meshes with the driving bevel gear D (861) is fixedly connected to the top end of the transmission shaft (83).

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