A welding device for combined bridge rapid construction and a construction method

Abstract

This invention relates to the field of welding equipment technology, and discloses a welding device and construction method for rapid construction of combined bridges, comprising: a movable positioning mechanism, which is drivably installed on the outside of a precast RC beam; the movable positioning mechanism includes a rectangular frame, a driving slider is provided on the outside of the rectangular frame, and a support block is hinged to the outside of the driving slider; a movable plate is slidably connected to the outside of the support block, and a gas guiding mechanism and a welding mechanism are provided on the outside of the movable plate; by setting a first gas guiding unit and a second gas guiding unit, argon and carbon dioxide are respectively discharged, so that the welding position forms a relatively independent welding space, effectively reducing the influence of the external environment on the welding process. Through the double-layer protective gas, not only is the protection effect on the welding position effectively improved, but the amount of argon used is also reduced, reducing argon loss during the welding process. A stable and efficient protective effect can be achieved with a small amount of argon, effectively improving the welding efficiency of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding devices, in particular to a welding device for rapid construction of combined bridges and a construction method. BACKGROUND

[0002] In order to improve the efficiency of bridge construction, the existing bridge construction usually adopts a prefabricated concrete bridge, which is constructed by prefabricating the bridge, then splicing the bridge at the bridge construction site, and then welding the splicing position to complete the rapid use of the bridge.

[0003] In the Chinese patent with the patent number CN119658255B, a bridge welding device and a bridge welding method are disclosed, which include a machine body and an electromagnet fixedly connected to the bottom of the machine body, and further include a rotary swing adjusting mechanism, a moving mechanism, an angle overturning mechanism, a height adjusting mechanism, and a driving mechanism. By installing the driving mechanism, the rotary swing adjusting mechanism, the angle overturning mechanism, the height adjusting mechanism, the moving mechanism, and the transmission mechanism, power output and power transmission processing are performed to complete the welding process.

[0004] Although the above-mentioned invention can perform automatic welding processing, the overall structure is complex to install, and the motion trajectory is single, which leads to unsatisfactory welding effect. In addition, during the welding process, the welding gun directly acts on the welding point. Since the bridge welding is usually performed at a high altitude, the ambient temperature is usually low, the solder cools too quickly, which leads to a decrease in welding strength, and affects the overall strength of the bridge. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a welding device for rapid construction of combined bridges and a construction method, which has the advantages of simple overall installation, intelligent operation, and effective protection of the welding process.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A welding device for rapid construction of combined bridges, comprising:

[0008] A moving positioning mechanism, which is drivably installed on the outside of a prefabricated RC beam, the moving positioning mechanism comprising a rectangular frame, which is detachably installed on the outside of the prefabricated RC beam, the outside of the rectangular frame being provided with a driving sliding block, the outside of the driving sliding block being hingedly connected with a supporting block;

[0009] A movable plate, which is slidingly connected to the outside of the supporting block, the outside of the movable plate being provided with a gas guide mechanism and a welding mechanism;

[0010] The welding mechanism comprises a welding gun rod, the outside of the welding gun rod being sleeved with a positioning sleeve ring, the positioning sleeve ring being fixedly connected to the outside of the movable plate, the welding gun rod comprising a welding gun head;

[0011] The air guide mechanism comprises a pump system fixedly arranged outside the movable plate, and further comprises a sleeve ring sleeved outside the welding torch head, and the inside of the sleeve ring is provided with a first air guide unit and a second air guide unit.

[0012] Preferably, the outer side of the rectangular frame is provided with a U-shaped guide rail, a driving sliding block is mounted on the outside of the U-shaped guide rail, the inner side of the rectangular frame is provided with a lower fixing device and an upper pressing plate, the lower fixing device is detachably mounted on the rectangular frame, the top of the lower fixing device is provided with a telescopic rod, the top of the telescopic rod is fixedly connected with a lower pressing plate, the two sides of the upper pressing plate are slidably connected with sliding plates, the outer side of the sliding plate is fixedly connected with a clamping plate, the top of the sliding plate is fixedly connected with a threaded block, the inside of the threaded block is threadedly connected with a threaded rod, the threaded rod is rotatably connected with the upper pressing plate, the inside of the upper pressing plate is provided with a clamping motor for driving the threaded rod to rotate, and the lower fixing device and the upper pressing plate are used for fixing and mounting the rectangular frame on the top of the prefabricated RC beam.

[0013] Preferably, the welding mechanism further comprises a driving motor fixedly connected to the outside of the movable plate, the output end of the driving motor is fixedly connected with a driving screw rod, the outside of the driving screw rod is threadedly connected with a driving block, the driving block is fixedly connected with the welding torch rod, the welding torch rod slides in the inside of the positioning sleeve ring, the driving screw rod is used for driving the welding torch rod to extend outward through the driving block, the outside of the movable plate is fixedly connected with a monitoring module and a monitoring probe, and the monitoring module and the monitoring probe are signal connected.

[0014] Preferably, the first air guide unit comprises an inner air guide ring fixedly connected to the inside of the sleeve ring, the inner air guide ring is communicated with the inner air inlet ring, the outside of the inner air guide ring is movably connected with an inner air outlet ring, the inner air outlet ring is provided with an air guide nozzle near one side of the head of the welding torch head, the air guide nozzle is inclinedly arranged towards the axis of the welding torch head, and the outer side of the welding torch head is arranged with a flow guide groove.

[0015] Preferably, the second air guide unit comprises an outer air guide ring fixedly connected to the inside of the sleeve ring, the inside of the outer air guide ring is movably connected with a movable ring, the inside of the outer air guide ring is fixedly connected with a baffle, the baffle and the movable ring are provided with a pressure spring therebetween, the inner side of the movable ring is provided with a communication hole, the outer side of the outer air guide ring is provided with an outer air outlet ring, the communication hole is used for connecting the movable ring and the outer air outlet ring, and the outer side of the outer air outlet ring is provided with an air outlet.

[0016] Preferably, the outer side of the movable ring is fixedly connected with a connecting rod, the connecting rod penetrates through the outer air guide ring, the inner air outlet ring and the sleeve ring and extends to the inside of the inner air outlet ring, the inside of the inner air outlet ring is movably connected with an inner valve ring, the inner valve ring and the inner air outlet ring are provided with an inner valve spring therebetween, and the connecting rod abuts against the bottom of the inner valve ring.

[0017] Preferably, the interior of the air pump system is provided with an air outlet regulating valve, the air pump system is communicated with the inner air inlet ring and the outer air inlet ring through the air outlet regulating valve, a first air inlet cavity and a first air outlet cavity are arranged in the interior of the air outlet regulating valve, an inner valve block is movably connected between the first air inlet cavity and the first air outlet cavity, a top pressing cavity is arranged at the bottom of the inner valve block, the top pressing cavity is communicated with the first air inlet cavity, a first air inlet pipe is arranged outside the first air inlet cavity, a first air outlet pipe is arranged outside the first air outlet cavity, a telescopic pipe is fixedly connected to the top of the inner valve block, an adjusting spring is arranged between the inner valve block and the air outlet regulating valve, an inner sealing block is arranged at the connecting port of the inner valve block and the telescopic pipe, a positioning rod is fixedly connected to the bottom of the inner sealing block, a second air inlet cavity is arranged in the interior of the air outlet regulating valve, the interior of the inner valve block is communicated with the second air inlet cavity, a second air inlet pipe is arranged outside the second air inlet cavity, and a second air outlet pipe is arranged outside the telescopic pipe.

[0018] A welding construction method for combined bridge rapid construction, comprising the following steps:

[0019] S1, installing a prefabricated RC beam at a bridge construction site, arranging a U-shaped steel and a reinforcing bar at both ends of the prefabricated RC beam, and overlapping the prefabricated RC beam with a steel pipe and an extension plate arranged at a bridge pier through the U-shaped steel and the reinforcing bar at both ends;

[0020] S2, using a hoist or a cloud platform to transport a welding device, and clamping a rectangular frame at the top of the prefabricated RC beam;

[0021] S3, controlling the rectangular frame to move to a welding position, and controlling a driving sliding block to move a welding gun rod;

[0022] S4, welding the reinforcing bar and the extension plate by the welding gun rod, and welding a joint between the U-shaped steel and the prefabricated bridge pier steel pipe;

[0023] S5, driving the driving sliding block to move the welding gun rod along the joint of the U-shaped steel, and welding the joint between the U-shaped steel and the steel pipe by the welding gun rod;

[0024] S6, completing the welding process of steps S3-S5, controlling the welding mechanism to reset, and driving the rectangular frame to walk on the top of the prefabricated RC beam to the other side;

[0025] S7, controlling the welding gun rod to rotate horizontally by half a circle, so that the welding gun rod is aligned with the joint between the U-shaped steel and the steel pipe;

[0026] S8, completing the welding position alignment of step S7, and performing the welding process of steps S3-S5;

[0027] S9, when the welding of both ends of the prefabricated RC beam is completed, controlling the welding mechanism to stop, and disassembling the rectangular frame.

[0028] Preferably, during the welding process of steps S3-S5, the welding torch head sprays protective gas through the gas guide mechanism, and the protective gas comprises two layers, the inner layer of the protective gas is argon, and the outer layer of the protective gas is carbon dioxide.

[0029] Advantages of the present application:

[0030] 1. The welding device for the rapid construction of a combined bridge is provided with first and second gas guide units for guiding argon and carbon dioxide respectively, so that a relatively independent welding space is formed at the welding position, the influence of the external environment on the welding process is effectively reduced, the double-layer protective gas not only effectively improves the protection effect on the welding position, but also reduces the amount of argon used and the loss of argon during the welding process, so that a stable and efficient protection effect can be achieved with a small amount of argon, and the welding efficiency of the device is effectively improved.

[0031] 2. The welding device for the rapid construction of a combined bridge is provided with a movable ring, an inner valve ring and an air outlet adjusting valve, so as to ensure the synchronism of the guiding of argon and carbon dioxide, and the guiding of argon is controlled by the guiding of carbon dioxide, so that the separate guiding of argon is effectively avoided, the wasteful use of argon is effectively reduced, and resource waste is reduced, so that when argon is guided for welding protection, the outer layer of the argon stably contains synchronously flowing carbon dioxide, direct contact of argon with air is avoided, and the welding quality of the rapid construction of a bridge is ensured.

[0032] 3. The welding construction method for the rapid construction of a combined bridge is provided with a rectangular frame and a welding mechanism, so as to achieve the effect of intelligent welding, the overall installation process of the rectangular frame is simple, the rectangular frame and the welding mechanism are increasingly controlled, so as to improve the overall efficiency of welding, and the welding mechanism is controlled to perform fixed-point welding operation, so as to effectively reduce the trouble of manual operation, and the welding efficiency and safety of the rapid construction of a bridge are improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A schematic view of the installation of the rectangular frame of the present application on the top of a prefabricated RC beam;

[0034] Figure 2 A schematic view of the connection of the welding mechanism, the movable plate and the supporting block of the present application;

[0035] Figure 3 A schematic view of the bottom perspective of the welding gun rod of the present application;

[0036] Figure 4 A schematic view of the cross-sectional structure of the outer sleeve ring of the present application;

[0037] Figure 5 A schematic view of the A part of the present application; Figure 4

[0038] ​Figure 6 Part B of the application Figure 4 is an enlarged schematic view of the application

[0039] Figure 7 is a schematic view of the air outlet regulating valve mechanism of the application

[0040] Figure 8 is a schematic view of the combined bridge of the application

[0041] Figure 9 is a schematic view of the U-shaped steel and the bridge pier steel pipe welding position of the application

[0042] Figure 10 is a schematic view of the main structure of the welding device of the application

[0043] In the figure: 1, rectangular frame; 11, U-shaped guide rail; 2, lower fixing device; 21, telescopic rod; 22, lower pressing plate; 3, upper pressing plate; 31, sliding plate; 32, clamping plate; 33, threaded block; 34, threaded rod; 4, driving sliding block; 41, support block; 5, movable plate; 51, air pumping system; 52, positioning collar; 53, welding gun rod; 54, driving block; 55, driving screw; 56, driving motor; 6, monitoring module; 61, monitoring probe; 7, welding head; 71, flow guide groove; 8, outer collar; 81, inner air guide ring; 82, inner air outlet ring; 83, air guide nozzle; 84, inner air inlet ring; 85, outer air guide ring; 86, movable ring; 861, communication hole; 87, pressure spring; 88, baffle; 89, outer air outlet ring; 810, air outlet; 811, outer air inlet ring; 812, connecting rod; 813, inner valve ring; 814, inner valve spring; 9, air outlet regulating valve; 91, first air inlet cavity; 92, first air outlet cavity; 93, inner valve block; 94, top pressing cavity; 95, first air inlet pipe; 96, first air outlet pipe; 97, telescopic pipe; 98, adjusting spring; 99, inner sealing block; 910, positioning rod; 911, second air inlet cavity; 912, second air inlet pipe; 913, second air outlet pipe; 10, prefabricated RC beam; 101, U-shaped steel; 102, reinforcing bar. DETAILED DESCRIPTION

[0044] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0045] Embodiment one

[0046] Please refer to Figure 1 - Figure 10The utility model relates to a kind of combination bridge rapid construction welding device, comprising:

[0047] Mobile positioning mechanism, mobile positioning mechanism is driven and mounted to the outside of prefabricated RC beam 10, mobile positioning mechanism includes rectangular frame 1, rectangular frame 1 is detachably mounted to the outside of prefabricated RC beam 10, the outside of rectangular frame 1 is provided with drive slider 4, the outside of drive slider 4 is hinged with support block 41;

[0048] Movable plate 5, movable plate 5 is slidably connected to the outside of support block 41, and the outside of movable plate 5 is provided with gas guide mechanism and welding mechanism;

[0049] Welding mechanism includes welding torch rod 53, and welding torch rod 53 is sleeved with positioning sleeve ring 52 outside, and positioning sleeve ring 52 is fixedly connected to the outside of movable plate 5, and welding torch rod 53 includes welding torch head 7;

[0050] Gas guide mechanism includes pump gas system 51, and pump gas system 51 is fixedly arranged at the outside of movable plate 5, and gas guide mechanism further includes outer sleeve ring 8, and outer sleeve ring 8 is sleeved at the outside of welding torch head 7, and the inside of outer sleeve ring 8 is provided with first gas guide unit and second gas guide unit, and first gas guide unit includes inner gas inlet ring 84, and second gas guide unit includes outer gas inlet ring 811, and inner gas inlet ring 84 and outer gas inlet ring 811 are communicated with pump gas system 51 by connecting gas pipe.

[0051] In the welding process, rectangular frame 1 is mounted to the outside of prefabricated RC beam 10, and rectangular frame 1 can move outside prefabricated RC beam 10, facilitating the movement of rectangular frame 1 to both ends of prefabricated RC beam 10, completing the welding of both ends of prefabricated RC beam 10 and prefabricated pier steel pipe, thereby improving the intelligence of the welding device.

[0052] In the welding process, first gas guide unit and second gas guide unit respectively spray argon and carbon dioxide, wherein second gas guide unit is arranged outside first gas guide unit, so that the sprayed carbon dioxide cover is outside the argon layer, and argon surrounds the outside of welding torch head 7.

[0053] By setting first gas guide unit and second gas guide unit, by respectively guiding argon and carbon dioxide, by using argon for inner protection and carbon dioxide for outer protection, a relatively independent welding space is formed at the welding position, effectively reducing the influence of the external environment on the welding process, avoiding the reduction of welding quality caused by the external low-temperature environment, and simultaneously using argon for protection during the welding process and using carbon dioxide for protection of argon, reducing the inflow of external oxygen into the argon protection layer, thereby avoiding the oxidation of the welding pool, through double-layer protection gas, not only effectively improving the protection effect on the welding position, but also reducing the amount of argon used and the loss of argon during the welding process, so that stable and efficient protection effect can be achieved by using a small amount of argon, thereby effectively improving the welding benefit of the device.

[0054] It should be noted that the support block 41 can rotate horizontally around the driving sliding block 4, which is used to control the flexible movement of the welding gun rod 53 to the left and right sides of the rectangular frame 1. Before controlling the horizontal rotation of the support block 41, the driving support block 41 tends to be horizontally deflected, so that the support block 41 is attached to the top of the driving sliding block 4, and when the support block 41 is rotated to the other side of the rectangular frame 1, the support block 41 is controlled to rotate in the vertical direction, and the support block 41 is controlled to rotate to the vertical direction.

[0055] In an optional embodiment: The outside of the rectangular frame 1 is provided with a U-shaped guide rail 11, the driving sliding block 4 is drivenly installed outside the U-shaped guide rail 11, the inside of the rectangular frame 1 is provided with a lower fixing device 2 and an upper pressing plate 3, the lower fixing device 2 and the rectangular frame 1 are detachably installed, the top of the lower fixing device 2 is provided with a telescopic rod 21, the top of the telescopic rod 21 is fixedly connected with a lower pressing plate 22, both sides of the upper pressing plate 3 are slidably connected with a sliding plate 31, the outside of the sliding plate 31 is fixedly connected with a clamping plate 32, the top of the sliding plate 31 is fixedly connected with a threaded block 33, the inside of the threaded block 33 is threadedly connected with a threaded rod 34, the threaded rod 34 is rotatably connected with the upper pressing plate 3, and the inside of the upper pressing plate 3 is provided with a clamping motor for driving the threaded rod 34 to rotate, and the lower fixing device 2 and the upper pressing plate 3 are used to fixedly install the rectangular frame 1 on the top of the prefabricated RC beam 10.

[0056] It should be noted that the U-shaped guide rail 11 includes a top horizontal rail and two side vertical rails, which are smoothly connected, and when the driving sliding block 4 slides outside the U-shaped guide rail 11, the driving sliding block 4 drives the welding gun rod 53 to move in the horizontal rail or the vertical rail, when the welding gun rod 53 moves along the horizontal rail, the welding gun rod 53 welds the steel bar 102 connection point, and when the welding gun rod 53 moves along the vertical rail, the welding gun rod 53 welds the joint of the U-shaped steel 101 and the steel pipe.

[0057] Specifically, when installing the rectangular frame 1, the upper pressing plate 3 abuts against the top of the prefabricated RC beam 10, and at the same time, the lower fixing device 2 and the bottom end of the rectangular frame 1 are connected by buckles or bolts, the telescopic rod 21 is controlled to extend upward, the telescopic rod 21 drives the lower pressing plate 22 to move upward, and the lower pressing plate 22 abuts against the bottom of the prefabricated RC beam 10.

[0058] Further, the clamping motor drives the threaded rod 34 to rotate, the threaded rod 34 drives the two sliding plates 31 to slide towards each other through the threaded block 33, and the two sliding plates 31 drive the clamping plates 32 to clamp the two sides of the prefabricated RC beam 10, so as to complete the installation and fixation of the rectangular frame 1 together with the lower fixing device 2.

[0059] It should be noted that the top of the lower pressing plate 22 is provided with a driving wheel, the outside of the driving wheel is provided with a walking motor for controlling the rotation of the driving wheel, and the walking motor is used to drive the driving wheel to rotate, and by controlling the rotation of the driving wheel, the rectangular frame 1 is driven to move outside the prefabricated RC beam 10.

[0060] Further, the bottom of the upper pressing plate 3 is provided with a driven roller. By providing the driven roller on the bottom of the upper pressing plate 3, the movement of the rectangular frame 1 is ensured to be stable when the lower pressing plate 22 drives the rectangular frame 1 to move.

[0061] Reference Figure 2 In an optional embodiment, the welding mechanism further comprises a driving motor 56 fixedly connected to the outside of the movable plate 5, the output end of the driving motor 56 is fixedly connected with a driving screw 55, the outside of the driving screw 55 is threadedly connected with a driving block 54, the driving block 54 and the welding gun rod 53 are fixedly connected, the welding gun rod 53 slides in the inside of the positioning sleeve ring 52, the driving screw 55 is used to drive the welding gun rod 53 to extend outward through the driving block 54, the outside of the movable plate 5 is fixedly connected with a monitoring module 6 and a monitoring probe 61, and the monitoring module 6 and the monitoring probe 61 are signal connected.

[0062] It should be noted that when the rectangular frame 1 moves to the welding position, the control driving motor 56 is started, the driving motor 56 drives the driving screw 55 to rotate, the driving screw 55 drives the driving block 54 to move downward, the driving block 54 drives the welding gun rod 53 to move downward, the welding gun head 7 is aligned with the welding position, and the welding work is carried out.

[0063] It should be noted that during the alignment of the welding gun head 7, the monitoring module 6 detects the position of the welding gun head 7 through the monitoring probe 61, so as to effectively ensure the accuracy of the welding position of the welding gun rod 53.

[0064] Through the cooperation of the rectangular frame 1 and the welding mechanism, the effect of intelligent welding is achieved, the overall installation process of the rectangular frame 1 is simple, the rectangular frame 1 and the welding mechanism are increasingly controlled, so as to improve the overall efficiency of welding, and the intelligent control of the welding mechanism is carried out for the spot welding work, which effectively reduces the trouble of manual operation, so as to improve the welding efficiency and welding safety of the bridge rapid construction welding.

[0065] Reference Figure 4 and Figure 5 In an optional embodiment, the first air guide unit comprises an inner air guide ring 81 fixedly connected to the inside of the outer sleeve ring 8, the inner air guide ring 81 is communicated with an inner air inlet ring 84, the outside of the inner air guide ring 81 is movably connected with an inner air outlet ring 82, the inner air outlet ring 82 is provided with an air guide nozzle 83 close to the head side of the welding gun head 7, the air guide nozzle 83 is inclinedly arranged towards the axis direction of the welding gun head 7, and the welding gun head 7 is arranged with a flow guide groove 71 on the outer side surface array of the air guide nozzle 83

[0066] It should be noted that the inner gas inlet ring 84 is connected with the gas pumping system 51, the gas pumping system 51 is connected with the argon storage tank, the argon enters the inner gas inlet ring 84 through the gas pumping system 51, and then enters the inner gas guide ring 81 through the inner gas inlet ring 84, and then enters the inner gas outlet ring 82, and finally is sprayed out through the gas nozzle 83.

[0067] Since the gas nozzle 83 is inclined inward, the sprayed argon flows towards the axial direction of the welding torch head 7, and when the argon contacts the flow guide groove 71, the flowing argon spirally flows under the action of the flow guide groove 71, so that the argon flows around the outside of the welding torch head 7, effectively ensuring the protection effect of the argon on the welding process.

[0068] Reference Figure 4 and Figure 6 In an alternative embodiment, the second gas guide unit comprises an outer gas guide ring 85 fixedly connected inside the sleeve ring 8, an active ring 86 movably connected inside the outer gas guide ring 85, a baffle plate 88 fixedly connected inside the outer gas guide ring 85, a pressure spring 87 arranged between the baffle plate 88 and the active ring 86, a communication hole 861 opened on the inner side of the active ring 86, and an outer gas outlet ring 89 opened on the outer side of the outer gas guide ring 85, the communication hole 861 being used to connect the active ring 86 and the outer gas outlet ring 89, and the outer side of the outer gas outlet ring 89 being provided with a gas outlet 810.

[0069] It should be noted that the outer gas inlet ring 811 is connected with the gas pumping system 51, the gas pumping system 51 is connected with the carbon dioxide storage tank, the carbon dioxide enters the outer gas inlet ring 811 through the gas pumping system 51, and then enters the outer gas guide ring 85 through the outer gas inlet ring 811, at this time the internal pressure of the outer gas guide ring 85 increases, thereby extruding the active ring 86 to move downward, so that the active ring 86 compresses the pressure spring 87.

[0070] During the downward movement of the active ring 86, the active ring 86 drives the communication hole 861 to disengage from the inner abutting position of the outer gas guide ring 85, so that the outer gas guide ring 85 is connected with the outer gas outlet ring 89 through the communication hole 861, and then is guided out through the gas outlet 810.

[0071] When the carbon dioxide is guided out through the outer gas outlet ring 89, the carbon dioxide is guided through the baffle plate 88, is throttled in the transverse direction, and can flow into the lower cavity of the baffle plate 88 uniformly, and then is guided out through the gas outlet 810, effectively ensuring the uniformity of the carbon dioxide gas guided out.

[0072] Reference Figure 4In an optional embodiment, the outer end of the movable ring 86 is fixedly connected with a connecting rod 812, the connecting rod 812 penetrates the outer gas guide ring 85, the inner gas outlet ring 82 and the outer sleeve ring 8 and extends to the inside of the inner gas outlet ring 82, the inside of the inner gas outlet ring 82 is movably connected with an inner valve ring 813, an inner valve spring 814 is arranged between the inner valve ring 813 and the inner gas outlet ring 82, and the connecting rod 812 abuts against the bottom of the inner valve ring 813.

[0073] It should be noted that in the initial state, the upper and lower cavities in the inside of the inner gas outlet ring 82 are in a cut-off state under the action of the inner valve ring 813, and at the same time, the outer gas guide ring 85 and the outer gas outlet ring 89 are in a cut-off state under the action of the movable ring 86.

[0074] When the movable ring 86 moves downward under the action of carbon dioxide to make the outer gas guide ring 85 and the outer gas outlet ring 89 communicate, the movable ring 86 drives the connecting rod 812 to move downward, the connecting rod 812 is separated from the inner valve ring 813, and then the inner valve ring 813 is pressed against the inner valve spring 814 under the pushing of the argon, so that the upper and lower cavities of the inner gas outlet ring 82 are communicated.

[0075] Through the cooperation of the movable ring 86 and the inner valve ring 813, the synchronization of the carbon dioxide and argon discharge is effectively ensured, the effect of gas protection is ensured, the carbon dioxide can be stably distributed outside the argon flow layer, through the use of double-layer protection gas, the mixed contact of the external oxygen and argon convection is effectively reduced, so that the influence of the external oxygen on the welding process is reduced, and the welding quality is improved.

[0076] Reference Figure 7 In an optional embodiment, the inside of the pump gas system 51 is provided with a gas outlet adjusting valve 9, the pump gas system 51 communicates with the inner gas inlet ring 84 and the outer gas inlet ring 811 through the gas outlet adjusting valve 9, the inside of the gas outlet adjusting valve 9 is provided with a first gas inlet cavity 91 and a first gas outlet cavity 92, the first gas inlet cavity 91 and the first gas outlet cavity 92 are movably connected with an inner valve block 93, the bottom of the inner valve block 93 is provided with a top pressing cavity 94, the top pressing cavity 94 communicates with the first gas inlet cavity 91, the outside of the first gas inlet cavity 91 is provided with a first gas inlet pipe 95, the outside of the first gas outlet cavity 92 is provided with a first gas outlet pipe 96, the top of the inner valve block 93 is fixedly connected with a telescopic pipe 97, the inner valve block 93 and the gas outlet adjusting valve 9 are provided with an adjusting spring 98, the connecting port position of the inner valve block 93 and the telescopic pipe 97 is provided with an inner sealing block 99, the bottom of the inner sealing block 99 is fixedly connected with a positioning rod 910, the inside of the gas outlet adjusting valve 9 is provided with a second gas inlet cavity 911, the second gas inlet cavity 911 communicates with the inside of the inner valve block 93, the outside of the second gas inlet cavity 911 is provided with a second gas inlet pipe 912, and the outside of the telescopic pipe 97 is provided with a second gas outlet pipe 913.

[0077] It should be noted that the carbon dioxide enters from the first gas inlet pipe 95 and flows out from the first gas outlet pipe 96;

[0078] The argon gas enters from the second gas inlet pipe 912 and flows out from the second gas outlet pipe 913.

[0079] Specifically, when the carbon dioxide enters the first gas inlet cavity 91 from the first gas inlet pipe 95, the carbon dioxide also enters the top pressure cavity 94, the internal pressure of the top pressure cavity 94 increases, thereby pushing the inner valve block 93 to move upwards, when the inner valve block 93 moves to the upper position, the first gas inlet cavity 91 and the first gas outlet cavity 92 are in a communication state, then the first gas inlet pipe 95 and the first gas outlet pipe 96 are in communication, thereby connecting the supply of carbon dioxide of the second gas guide unit.

[0080] And when the inner valve block 93 moves upwards, the connecting port of the telescopic pipe 97 and the inner valve block 93 is separated from the inner sealing block 99, then the telescopic pipe 97 is connected to the second gas inlet cavity 911 through the inner valve block 93, at this time the second gas inlet pipe 912 and the second gas outlet pipe 913 are in a communication state, thereby connecting the supply of argon gas of the first gas guide unit.

[0081] By using the gas outlet regulating valve 9, the synchronization of the argon gas and the carbon dioxide is ensured, and the argon gas is guided out by the carbon dioxide, so as to effectively avoid the situation that the argon gas is guided out alone, thereby effectively reducing the waste use of the argon gas and reducing the resource waste, so that when the argon gas is guided out for welding protection, the outer layer of the argon gas stably contains the synchronously flowing carbon dioxide, avoiding the direct contact of the argon gas with the air, by setting the carbon dioxide protective layer, thereby improving the protection effect of the argon gas on the welding, improving the protection effect of the protective gas on the welding process, and effectively improving the welding quality.

[0082] Embodiment two

[0083] The combined bridge includes a new type of whole prefabricated composite bridge deck panel combined beam, a fabricated steel pipe

[0084] Concrete multi-column pier-prefabricated RC beam 10 structure system, etc.

[0085] A welding construction method for rapid construction of a combined bridge, the steps of which include:

[0086] S1, installing a prefabricated RC beam 10 at a bridge construction site, U-shaped steel 101 and reinforcing steel 102 are arranged at both ends of the prefabricated RC beam 10, and the prefabricated RC beam 10 is lapped with the steel pipe and the extension plate arranged at the bridge pier through the U-shaped steel 101 and the reinforcing steel 102 at both ends;

[0087] S2, using a hoist or a pan head to transport a welding device, and clamping the rectangular frame 1 on the top of the prefabricated RC beam 10;

[0088] S3, control the rectangular frame 1 to move to the position to be welded, and control the driving slider 4 to move to weld, and the welding gun rod 53 moves along with the driving slider 4;

[0089] S4, the welding gun rod 53 welds the reinforcing steel bars 102 and the extension plate, and controls the U-shaped steel 101 and the joint of the prefabricated pier steel pipe to weld;

[0090] S5, the driving slider 4 drives the welding gun rod 53 to walk along the joint of the U-shaped steel 101, and the welding gun rod 53 welds the joint of the U-shaped steel 101 and the steel pipe;

[0091] S6, after the welding process of steps S3-S5 is completed, the welding mechanism is controlled to reset, and the rectangular frame 1 is driven to walk on the top of the prefabricated RC beam 10 to the other side;

[0092] S7, control the welding gun rod 53 to rotate horizontally by half a circle, so that the welding gun rod 53 is aligned with the joint of the U-shaped steel 101 and the steel pipe;

[0093] S8, after the welding position alignment of step S7 is completed, the welding process of steps S3-S5 is carried out;

[0094] S9, when the welding of both ends of the prefabricated RC beam 10 is completed, the welding mechanism is controlled to stop, and the rectangular frame 1 is disassembled.

[0095] In an optional embodiment, during the welding process of steps S3-S5, the welding gun head sprays protective gas through the gas guide mechanism, and the protective gas includes two layers, the inner layer protective gas is argon, and the outer layer protective gas is carbon dioxide.

[0096] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A combined bridge rapid construction welding device, characterized in that, The utility model relates to a mobile positioning mechanism, mobile positioning mechanism drivable installation in the outside of prefabricated RC beam (10), mobile positioning mechanism includes rectangular frame (1), rectangular frame (1) is detachably installed in the outside of prefabricated RC beam (10), the outside of rectangular frame (1) is provided with drive sliding block (4), the outside of drive sliding block (4) is hinged with support block (41); Movable plate (5) is slidably connected to the outside of support block (41), and the outside of movable plate (5) is provided with a gas guide mechanism and a welding mechanism; The welding mechanism includes a welding gun rod (53), a positioning sleeve ring (52) is sleeved on the outside of the welding gun rod (53), the positioning sleeve ring (52) is fixedly connected to the outside of the movable plate (5), and the welding gun rod (53) includes a welding gun head (7); The gas guide mechanism includes a pump gas system (51) fixedly arranged on the outside of the movable plate (5), and further includes an outer sleeve ring (8) sleeved on the outside of the welding gun head (7), the outer sleeve ring (8) is provided with a first gas guide unit and a second gas guide unit in the inside, the first gas guide unit includes an inner air inlet ring (84), the second gas guide unit includes an outer air inlet ring (811), and the inner air inlet ring (84) and the outer air inlet ring (811) are communicated with the pump gas system (51) through a connecting air pipe; The first gas guide unit includes an inner gas guide ring (81) fixedly connected to the inside of the outer sleeve ring (8), the inner gas guide ring (81) is communicated with the inner air inlet ring (84), the outer side of the inner gas guide ring (81) is movably connected with an inner air outlet ring (82), the inner air outlet ring (82) is provided with a gas guide nozzle (83) close to the head side of the welding gun head (7), the gas guide nozzle (83) is inclinedly arranged towards the axial direction of the welding gun head (7), and the welding gun head (7) is arranged with a flow guide groove (71) on the outer side of the gas guide nozzle (83) in an array form; The second gas guide unit includes an outer gas guide ring (85) fixedly connected to the inside of the outer sleeve ring (8), the inside of the outer gas guide ring (85) is movably connected with a movable ring (86), the inside of the outer gas guide ring (85) is fixedly connected with a baffle (88), the baffle (88) and the movable ring (86) are provided with a pressure spring (87) therebetween, the inner side of the movable ring (86) is provided with a communication hole (861), the outer side of the outer gas guide ring (85) is provided with an outer air outlet ring (89), the communication hole (861) is used for communicating the movable ring (86) with the outer air outlet ring (89), and the outer side of the outer air outlet ring (89) is provided with an air outlet (810). ​ 2. The device for rapid construction welding of a combined bridge according to claim 1, characterized in that: The outside of the rectangular frame (1) is provided with a U-shaped guide rail (11), a driving sliding block (4) is drivably installed outside the U-shaped guide rail (11), the inside of the rectangular frame (1) is provided with a lower fixing device (2) and an upper pressing plate (3), the lower fixing device (2) and the rectangular frame (1) are detachably installed, the top of the lower fixing device (2) is provided with a telescopic rod (21), the top of the telescopic rod (21) is fixedly connected with a lower pressing plate (22), the both sides of the upper pressing plate (3) are slidably connected with a sliding plate (31), the outside of the sliding plate (31) is fixedly connected with a clamping plate (32), the top of the sliding plate (31) is fixedly connected with a threaded block (33), the inside of the threaded block (33) is threadedly connected with a threaded rod (34), the threaded rod (34) is rotatably connected with the upper pressing plate (3), the inside of the upper pressing plate (3) is provided with a clamping motor for driving the threaded rod (34) to rotate, and the lower fixing device (2) and the upper pressing plate (3) are used for fixing and installing the rectangular frame (1) on the top of the prefabricated RC beam (10).

3. The device for rapid construction welding of a combined bridge according to claim 1, characterized in that: The welding mechanism further comprises a driving motor (56) fixedly connected to the outside of the movable plate (5), an output end of the driving motor (56) is fixedly connected with a driving lead screw (55), the outside of the driving lead screw (55) is threadedly connected with a driving block (54), the driving block (54) and the welding gun rod (53) are fixedly connected, the welding gun rod (53) slides in the inside of the positioning sleeve ring (52), the driving lead screw (55) is used for driving the welding gun rod (53) to extend outward through the driving block (54), the outside of the movable plate (5) is fixedly connected with a monitoring module (6) and a monitoring probe (61), and the monitoring module (6) and the monitoring probe (61) are signal connected.

4. The device for rapid construction welding of a combined bridge according to claim 1, characterized in that: The outside of the movable ring (86) is fixedly connected with a connecting rod (812), the connecting rod (812) penetrates through the outer gas guide ring (85), the inner gas outlet ring (82) and the outer sleeve ring (8) and extends to the inside of the inner gas outlet ring (82), the inside of the inner gas outlet ring (82) is movably connected with an inner valve ring (813), an inner valve spring (814) is arranged between the inner valve ring (813) and the inner gas outlet ring (82), and the connecting rod (812) abuts against the bottom of the inner valve ring (813).

5. The device for rapid construction welding of a combined bridge according to claim 1, characterized in that: The interior of the pump gas system (51) is provided with an air outlet adjusting valve (9), the pump gas system (51) is communicated with the inner air inlet ring (84) and the outer air inlet ring (811) through the air outlet adjusting valve (9), the interior of the air outlet adjusting valve (9) is provided with a first air inlet cavity (91) and a first air outlet cavity (92), the first air inlet cavity (91) and the first air outlet cavity (92) are movably connected with an inner valve block (93), the bottom of the inner valve block (93) is provided with a top pressing cavity (94), the top pressing cavity (94) is communicated with the first air inlet cavity (91), the outside of the first air inlet cavity (91) is provided with a first air inlet pipe (95), the outside of the first air outlet cavity (92) is provided with a first air outlet pipe (96), the top of the inner valve block (93) is fixedly connected with an extension pipe (97), the inner valve block (93) and the air outlet adjusting valve (9) are provided with an adjusting spring (98), the connecting port position of the inner valve block (93) and the extension pipe (97) is provided with an inner sealing block (99), the bottom of the inner sealing block (99) is fixedly connected with a positioning rod (910), the interior of the air outlet adjusting valve (9) is provided with a second air inlet cavity (911), the second air inlet cavity (911) is communicated with the interior of the inner valve block (93), the outside of the second air inlet cavity (911) is provided with a second air inlet pipe (912), the outside of the extension pipe (97) is provided with a second air outlet pipe (913).

6. A welding construction method for the rapid construction of a composite bridge, according to any one of claims 1-5, wherein a welding device for the rapid construction of a composite bridge is used. The steps include: S1, a bridge construction site installs a prefabricated RC beam (10), both ends of the prefabricated RC beam (10) are provided with a U-shaped steel (101) and a reinforcing bar (102), the prefabricated RC beam (10) is lapped with a steel pipe and an extension plate arranged on a bridge pier through both ends of the U-shaped steel (101) and the reinforcing bar (102); S2, a hoist or a pan is used to transport a welding device, and a rectangular frame (1) is clamped on the top of the prefabricated RC beam (10); S3, the rectangular frame (1) is controlled to move to a welding position, and a driving slider (4) is controlled to move to weld, and a welding gun rod (53) moves with the driving slider (4); S4, the welding gun rod (53) welds the reinforcing bar (102) and the extension plate, and the U-shaped steel (101) and the prefabricated bridge pier steel pipe joint are welded; S5, the driving slider (4) drives the welding gun rod (53) to walk along the joint of the U-shaped steel (101), and the welding gun rod (53) welds the joint of the U-shaped steel (101) and the steel pipe; S6, the welding process of steps S3-S5 is completed, the welding mechanism is controlled to reset, and the rectangular frame (1) is driven to walk on the top of the prefabricated RC beam (10) to the other side; S7, the welding gun rod (53) is controlled to rotate horizontally by half a circle, so that the welding gun rod (53) is aligned with the joint of the U-shaped steel (101) and the steel pipe; S8, the welding position of step S7 is completed, and the welding process of steps S3-S5 is performed; S9, when the welding of both ends of the prefabricated RC beam (10) is completed, the welding mechanism is controlled to stop, and the rectangular frame (1) is disassembled.

7. The method for combined bridge rapid construction welding construction according to claim 6, characterized in that: In the welding process of steps S3-S5, the welding head sprays protective gas through the gas guide mechanism, and the protective gas includes two layers, the inner layer protective gas is argon, and the outer layer protective gas is carbon dioxide.

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