A mobile welding device for the steel bar framework of precast box girders for highways

Abstract

The present invention discloses a mobile welding device for the steel bar framework of highway precast box girders, which relates to the technical field of mobile welding. The technical problem to be solved is that there are deficiencies in the arrangement and use state of welding torches when welding the intersections of steel bars in the steel bar framework of box girders by the existing welding devices. The device includes two bottom plates. Two guide rails are fixedly connected to the tops of the two bottom plates through first bolts, and a moving block is slidably connected to the tops of the two guide rails in common. The welding mechanism of the present invention realizes two ways of using welding torches through a lead screw. When the support plate is opened, the lead screw makes two groups of linearly arranged welding torches in an inclined shape, which is adapted to the shape of the steel bar framework of the box girder, and improves the welding efficiency of the intersections of steel bars. When the lead screw moves upward, the two groups of welding torches can be arranged in a linear array on the same horizontal plane. The adjusting assembly can respectively adjust the welding angles of the two groups of welding torches to improve the adaptability. A limiting structure is also designed to prevent the welding torches from translating and shaking, and to realize multi-angle welding by making the adjusting cylinder rotate under torque when translating.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile welding, and more specifically, to a mobile welding device for the steel bar framework of precast box girders on highways. Background Art

[0002] In the construction of highway bridges, the welding quality of the steel bar framework of precast box girders plays a decisive role in the overall stability and safety of the bridge; however, there are many problems in the existing welding technology for the steel bar framework of precast box girders on highways, especially when welding the intersections of steel bars, serious limitations are exposed; this directly affects the efficiency and quality of the welding work, and further threatens the overall quality and safety of the bridge.

[0003] As shown in the appendix Figure 13 and Figure 14 For the welding of the longitudinal steel bars and stirrups on both side plates: at the positions of the two side plates of the precast box girder, the longitudinal steel bars are usually arranged in parallel at equal intervals, and the stirrups pass through the longitudinal steel bars horizontally. The intersections of the longitudinal steel bars and the stirrups form a linear array, and the welding of these intersections is the linear array welding treatment; the welding points of the steel bars at the corners of the box girder: at the rounded corners of the precast box girder, the steel bars need to be arranged and welded according to the shape of the corner; the steel bars will form an arc transition, and the welding points will also form an arc accordingly to ensure the structural strength at the corner and the integrity of the steel bar connection. Traditional welding is mostly manual, but during manual welding, the welding quality is inconsistent and the welding efficiency is low.

[0004] When the existing welding device welds the intersections of the steel bars of the box girder steel bar framework, the arrangement and use state of the welding torches are relatively single, and the positions and angles of the welding torches cannot be flexibly adjusted, resulting in a reduction in the welding efficiency of the steel bar intersection positioning welding. In view of this, we propose a mobile welding device for the steel bar framework of precast box girders on highways. Summary of the Invention

[0005] The purpose of the present invention is to provide a mobile welding device for the steel bar framework of precast box girders on highways to solve the technical problem that when the existing welding device welds the intersections of the steel bars of the box girder steel bar framework, the arrangement and use state of the welding torches are insufficient.

[0006] To solve the above technical problem, the present invention provides the following technical solution: a mobile welding device for the steel bar framework of precast box girders on highways, including two bottom plates. On the top of each of the two bottom plates, two guide rails are fixedly connected by first bolts. A moving block is slidably connected to the top of the two guide rails. A driving module is arranged at the bottom of the moving block, and a welding mechanism is arranged inside the moving block;

[0007] The welding mechanism includes an adjusting cylinder and an adjusting component; the adjusting cylinder is movably sleeved on the inner wall of the moving block, and the adjusting component is arranged on the top of the moving block;

[0008] The end surface of the adjusting cylinder is symmetrically structured and is movably connected with two first support plates through first insertion rods. Each end of the first support plate is movably provided with two adjustment modules through first hinge frames. The ends of the two adjustment modules are jointly movably connected with a transmission plate through a second hinge frame. A number of welding torches are arranged in a linear array on one side of the two adjustment modules. Two screw rods are symmetrically fixed on the top of the transmission plate and pass through the adjusting cylinder. The tops of the two screw rods are movably connected with transmission wheels through first threads, and the transmission wheels are rotatably connected to the upper surface of the adjusting cylinder. A first motor is fixedly sleeved on the top of the adjusting cylinder by a first bracket. The output end of the first motor is fixedly connected with a pulley. The side surfaces of the two transmission wheels and the pulley are jointly movably connected through a transmission belt. The welding mechanism of the present invention realizes two ways of using the welding torches through the screw rods. When the support plates are opened, the screw rods make the two groups of linearly arranged welding torches inclined, adapting to the shape of the box girder steel bar framework and improving the welding efficiency at the intersection points of the steel bars. When the screw rods move upward, the two groups of welding torches can be arranged in a linear array on the same horizontal plane. The adjustment components can respectively adjust the welding angles of the two groups of welding torches, improving the adaptability. A limiting structure is also designed to prevent the welding torches from shaking horizontally and to enable the adjusting cylinder to rotate under torque during translation to achieve multi-angle welding.

[0009] Preferably, each of the adjustment modules is composed of a first hinge block, a second support plate, and a second hinge block;

[0010] The first hinge block is movably connected to the end of the first support plate through a first hinge frame. The second support plate is movably connected to one side of the first hinge block. A first sealing cavity is formed between the second support plate and the first hinge block through a sealing pipe. A number of the welding torches are fixedly sleeved on one side of the second support plate in a linear array. The second support plate is movably connected to the end of the transmission plate through a second hinge frame. A number of spiral strip blocks are fixedly connected in a circular array in the holes of the second support plate, and a sliding track is formed between adjacent two spiral strip blocks. One end of the second support plate close to the second hinge block is fixedly connected with a movable rod. The surface of the end of the movable rod is fixedly connected with a number of rollers through first pins in a circular array, and the rollers roll and contact inside the sliding track. One side of the first support plate is fixedly connected with a first air pump through a second bracket, and the output end of the first air pump is fixedly communicated with the first sealing cavity through a first air pipeline.

[0011] Preferably, the adjustment components include two telescopic frames. The two telescopic frames are symmetrically movably connected to the top of the moving block through second pins. The inner walls of both sides of the moving block are symmetrically movably connected with two electric push rods through third pins, and the electric push rods and the telescopic frames are movably connected through a first connecting frame. Four limiting clamping plates are symmetrically movably connected to the tops of both through third pins, and adjacent limiting clamping plates are arranged staggeredly. An adjusting plate is movably connected inside the four limiting clamping plates, and the top of the adjusting cylinder is rotatably connected inside the adjusting plate.

[0012] Preferably, two limiting blocks are fixedly connected inside each pair of the limiting clamping plates. A plurality of first springs are fixedly connected to one side of each limiting block. Each first spring is fixedly connected to a first slider away from the limiting block. A moving unit is arranged inside the bottom plate, and the moving unit is sleeved on the surface of the adjusting cylinder.

[0013] Preferably, four sliding grooves are symmetrically arranged at the top of the adjusting plate, and the sliding grooves correspond to the positions of the limiting clamping plates. The limiting blocks are slidably connected inside the sliding grooves, and the first sliders are slidably connected inside the sliding grooves.

[0014] Preferably, the moving unit includes a limiting cylinder. The limiting cylinder is movably sleeved on the side surface of the adjusting cylinder, and the limiting cylinder is sleeved inside the moving block. An I-shaped cylinder is movably sleeved on the side surface of the limiting cylinder.

[0015] Preferably, a sliding cylinder is fixedly sleeved inside the moving block, and the I-shaped cylinder is slidably connected inside the sliding cylinder. A plurality of strip-shaped grooves are symmetrically arranged at both ends of the sliding cylinder respectively. A plurality of sliding blocks are symmetrically fixedly connected to the inner side walls of both sides of the I-shaped cylinder, and the sliding blocks are slidably connected inside the strip-shaped grooves. A rotating module is arranged on the inner wall of the moving block.

[0016] Preferably, a plurality of limiting strips are fixedly connected to the inner wall of the limiting cylinder in an annular array, and the limiting strips are slidably connected in the upper groove of the adjusting cylinder.

[0017] Preferably, the rotating module includes two transmission blocks. The two transmission blocks are arranged in an annular array on the side surface of the adjusting cylinder, and the transmission blocks are slidably connected in the upper groove of the adjusting cylinder. Two mounting blocks are fixedly connected to the inner wall of the moving block in an annular array. Two arc-shaped outer shells are movably connected inside each of the two mounting blocks through fourth pins. An arc-shaped plate is slidably connected inside each arc-shaped outer shell.

[0018] Preferably, the arc-shaped plate is movably connected to the transmission block through a fifth pin. A second sealed cavity is formed between the end of the arc-shaped plate and the arc-shaped outer shell. Two second air pumps are fixedly connected to the inner side walls of both sides of the moving block, and the second air pumps are fixedly communicated with the second sealed cavity through second air pipelines.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The present invention sets a welding mechanism to enable several welding guns to be used in two ways. Among them, the support plate is propped open by a screw rod, so that the two groups of linearly arranged welding guns are tilted, so that they are adapted to the shape of the box beam steel frame, thereby improving the welding efficiency of the steel bar intersection points, and the screw rod is moved upward, so that the two groups of linearly arranged welding guns are arranged in a linear array on the same straight line while being in the same horizontal plane, and the adjustment component is used to achieve multi-point welding effects in the same position, that is, the design is made on the basis of the welding mechanism, and the welding angles of the two groups of linearly arranged welding guns can be adjusted separately to improve the adaptability of the device, and multiple designs are made on the basis of the adjustment component, so that the welding guns are limited when they are translated to avoid shaking and affecting the welding effect. Another design is to apply torque to the adjustment cylinder when the adjustment cylinder is translated to make it rotate, thereby achieving multi-angle welding effects and achieving the steel bar welding effect at the arc corners of the box beam.

[0021] 2. The present invention fills gas into the first sealed cavity through pneumatic components, so that the second support plate moves to one side, and the roller rolls in the sliding track to rotate the second support plate, thereby adjusting the welding angle of the welding gun and achieving multi-angle welding effects.

[0022] 3. The present invention sets an adjustment component. When the two electric push rods are working, the two telescopic frames rotate at the same time, adjust the height of the adjustment plate, and then realize the height adjustment of the adjustment cylinder. At the same time, when one of the electric push rods is working, the telescopic frame rotates at an angle and applies a force to one side of the adjustment plate, causing the adjustment cylinder to move horizontally. The present invention has a mechanism with two degrees of freedom in the plane and vertical movement, which improves the applicability and flexibility of the welding equipment.

[0023] 4. The present invention has a linkage mechanism with the adjustment component through the mobile unit. When one of the electric push rods is working, the angle of the telescopic frame is offset and a force is applied to one side of the adjustment plate, causing the adjustment cylinder to translate. The present invention prevents the adjustment cylinder from shaking due to the lack of a limiting mechanism during translation by setting the mobile unit. The present invention is conducive to improving the stability of the adjustment cylinder.

[0024] 5. The present invention provides a rotating module, and the rotating module and the moving unit have a linkage mechanism. When the adjusting cylinder translates, the arc-shaped telescopic rod is squeezed, so that the arc-shaped telescopic rod applies torque to the adjusting cylinder, causing the adjusting cylinder to rotate, thereby adjusting the positions of two groups of welding guns arranged in a linear array on a plane, and realizing the welding effect of the welding guns in a limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 For the present invention Figure 1Schematic diagram of the overall structure of Prescription A;

[0027] Figure 3 Schematic diagram of the three-dimensional partial structure of the adjustment component of the present invention, showing the top structure of the moving block;

[0028] Figure 4 of the present invention Figure 3 Enlarged structure diagram of area B in;

[0029] Figure 5 Schematic diagram of the three-dimensional partial enlarged structure of the adjustment component of the present invention, showing the three-dimensional structure of the adjustment plate;

[0030] Figure 6 Schematic diagram of the three-dimensional partial enlarged structure of the welding mechanism of the present invention;

[0031] Figure 7 Schematic diagram of the three-dimensional structure of the adjustment module of the present invention;

[0032] Figure 8 Schematic diagram of the three-dimensional partial structure of the adjustment component of the present invention, showing the bottom structure of the moving block;

[0033] Figure 9 Schematic diagram of the three-dimensional partial structure of the adjustment component of the present invention, showing the bottom structure of the adjustment plate;

[0034] Figure 10 Schematic diagram of the three-dimensional structure of the moving unit of the present invention;

[0035] Figure 11 Schematic diagram of the three-dimensional enlarged structure of the rotation module of the present invention;

[0036] Figure 12 Schematic diagram of the arrangement structure of the welding torch used in the present invention, showing the welding of the intersection points of the steel bars on both side plates;

[0037] Figure 13 Schematic diagram of the working state structure of the linear arrangement of the welding torch of the present invention;

[0038] Figure 14 Schematic diagram of the working state structure of the linear arrangement of the welding torch of the present invention, showing the welding of the steel bars at the corner of the box girder.

[0039] Description of reference numerals in the figure: 1. Bottom plate; 101. Guide rail; 2. Moving block; 201. Driving module; 3. Welding mechanism; 301. Adjusting cylinder; 302. First support plate; 303. Transmission plate; 304. Welding torch; 305. Lead screw; 306. Transmission wheel; 307. First motor; 308. Pulley; 309. Transmission belt; 4. Adjusting assembly; 401. Telescopic frame; 402. Electric push rod; 403. Limit clamping plate; 404. Adjusting plate; 404a. Chute; 405. Limit block; 406. First spring; 407. First slider; 5. Adjusting module; 501. First hinge block; 502. Second support plate; 503. Second hinge block; 504. Spiral strip block; 505. Activity rod; 506. Roller; 507. First air pump; 6. Moving unit; 601. Limit cylinder; 601a. Limit strip; 602. I-shaped cylinder; 603. Sliding cylinder; 604. Strip groove; 605. Sliding block; 7. Rotating module; 701. Transmission block; 702. Mounting block; 703. Arc-shaped housing; 704. Arc-shaped plate; 705. Second air pump. Specific implementation mode

[0040] As Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 10 shown, a mobile welding device for the steel bar framework of a highway precast box girder according to the present invention includes two bottom plates 1. Two guide rails 101 are fixedly connected to the tops of the two bottom plates 1 through first bolts. A moving block 2 is slidably connected to the tops of the two guide rails 101. A driving module 201 is arranged at the bottom of the moving block 2. It should be noted that the driving module 201 is composed of components such as a motor, a pulley, and a chain. When in use, the motor drives the pulley to drive the moving block 2 to slide on the tops of the two guide rails 101. A welding mechanism 3 is arranged inside the moving block 2;

[0041] The welding mechanism 3 includes an adjusting cylinder 301 and an adjusting assembly 4; the adjusting cylinder 301 is movably sleeved on the inner wall of the moving block 2, and the adjusting assembly 4 is arranged on the top of the moving block 2;

[0042] The end surface of the adjusting cylinder 301 is symmetrically connected to two first support plates 302 through a first plug rod, and each end of the first support plate 302 is movably provided with two adjustment modules 5 through a first hinge frame. The ends of the two adjustment modules 5 are movably connected to a transmission plate 303 through a second hinge frame. A plurality of welding guns 304 are arranged in a linear array on one side of the two adjustment modules 5. It is worth noting that the welding gun 304 is a gas welding gun of the prior art, which has the effects of flexible use, convenience and speed, and can be used for steel frame welding in a limited space. The top of the transmission plate 303 is symmetrically fixedly connected to two screw rods 305, and the screw rods 305 pass through the adjusting cylinder 301. The tops of the two screw rods 305 are both connected by The first thread is movably connected to a transmission wheel 306, and the transmission wheel 306 is rotatably connected to the upper surface of the adjusting cylinder 301. The first bracket on the top of the adjusting cylinder 301 is fixedly sleeved with a first motor 307, and the output end of the first motor 307 is fixedly connected to a pulley 308. The two transmission wheels 306 are movably connected to the side surfaces of the pulley 308 through a transmission belt 309. The present invention enables a plurality of welding guns 304 to be used in two ways by setting a welding mechanism 3. Among them, the support plate is opened by the screw rod 305, so that the two sets of linearly arranged welding guns 304 are tilted, so that they are adapted to the shape of the box beam steel frame, thereby improving the welding efficiency of the steel bar intersection point, and the screw rod 305 is moved upward to make the two sets of linear The linearly arranged welding guns 304 are arranged in a linear array on the same horizontal plane and in the same straight line, and the multi-point welding effect at the same position is achieved by adjusting the component 4. That is, the design is made on the basis of the welding mechanism 3, and the welding angles of the two groups of linearly arranged welding guns 304 can be adjusted respectively to improve the adaptability of the device. A variety of designs are made on the basis of the adjusting component 4, so that the welding guns 304 are limited when they are translated to avoid shaking and affecting the welding effect. Another design is to apply torque to the adjusting cylinder 301 when it is translated to rotate it, thereby achieving a multi-angle welding effect. When in use, the moving block 2 is first driven to slide on the guide rail 101 by the driving module 201, When welding the intersection of steel bars in the same axial direction, the first motor 307 is first operated through the external circuit mechanism. The first motor 307 drives the pulley 308 to rotate and transmits the power through the transmission belt 309, so that the two transmission wheels 306 rotate synchronously in the same direction. Since the transmission wheel 306 is threadedly connected to the screw rod 305, the two screw rods 305 apply thrust to the transmission plate 303, and the first support plate 302 and the second support plate 502 move axially, so that the first support plate 302, the second support plate 502 and the transmission plate 303 are stretched apart, so that the second support plate 502 is adapted to the inner side of the box beam steel frame, and then the control system is used to operate the welding gun 304 to weld the intersection of the steel bars.

[0043] In an embodiment of the present invention, Figure 6 and Figure 7As shown, each adjustment module 5 is composed of a first hinge block 501, a second support plate 502, and a second hinge block 503;

[0044] The first hinge block 501 is movably connected to the end of the first support plate 302 through a first hinge frame. The second support plate 502 is movably connected to one side of the first hinge block 501. A first sealed cavity is formed between the second support plate 502 and the first hinge block 501 through a sealed pipe. A number of welding torches 304 are fixedly sleeved on one side of the second support plate 502 in a linear array. The second support plate 502 is movably connected to the end of a transmission plate 303 through a second hinge frame. A number of spiral strip blocks 504 are fixedly connected in a circular array in the holes of the second support plate 502, and a sliding track is formed between two adjacent spiral strip blocks 504. One end of the second support plate 502 close to the second hinge block 503 is fixedly connected with a movable rod 505. A number of rollers 506 are fixedly connected to the surface of the end of the movable rod 505 in a circular array through first pins, and the rollers 506 are in rolling contact inside the sliding track. One side of the first support plate 302 is fixedly connected with a first air pump 507 through a second bracket, and the output end of the first air pump 507 is fixedly communicated with the first sealed cavity through a first air pipeline. In the present invention, gas is filled into the first sealed cavity through a pneumatic component, so that the second support plate 502 moves to one side. By rolling the rollers 506 in the sliding track, the second support plate 502 rotates, thereby adjusting the welding angle of the welding torch 304 and achieving a multi-angle welding effect. When adjusting the welding angle of the welding torch 304, first, through an external control system, the first air pump 507 is made to work. Gas fills the first sealed cavity, applying a thrust to the second support plate 502, causing the movable rod 505 to move into the hole of the second hinge block 503, and by rolling the rollers 506 in the spiral track, the second support plate 502 rotates, realizing multi-angle welding treatment.

[0045] In an embodiment of the present invention, such as Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 8 and Figure 9As shown in the figure, the adjusting assembly 4 includes two telescopic frames 401. The two telescopic frames 401 are symmetrically and movably connected to the top of the moving block 2 by a second bolt. On both sides of the inner wall of the moving block 2, two electric push rods 402 are symmetrically and movably connected by a third bolt. The electric push rods 402 and the telescopic frames 401 are movably connected by a first connecting frame. Four limiting clamping plates 403 are symmetrically and movably connected to the top of both sides by a third bolt. The adjacent limiting clamping plates 403 are arranged staggeredly. An adjusting plate 404 is movably connected inside the four limiting clamping plates 403. The top of the adjusting cylinder 301 is rotatably connected to the inside of the adjusting plate 404. It should be noted that the top of the adjusting cylinder 301 can only rotate inside the adjusting plate 404 and cannot slide up and down inside the adjusting plate 404 to prevent the adjusting cylinder 301 from losing its supporting effect and falling off the device.

[0046] Two limiting blocks 405 are fixedly connected inside every two opposite limiting clamping plates 403. On one side of each limiting block 405, a number of first springs 406 are fixedly connected. Each first spring 406 is fixedly connected to a first slider 407 away from the limiting block 405. A moving unit 6 is arranged inside the bottom plate 1, and the moving unit 6 is sleeved on the surface of the adjusting cylinder 301. In the present invention, by setting the adjusting assembly 4, when the two electric push rods 402 work, the two telescopic frames 401 rotate simultaneously to adjust the height of the adjusting plate 404, and further realize the height adjustment of the adjusting cylinder 301. At the same time, when one of the electric push rods 402 works, the telescopic frame 401 rotates at an angle to apply a force to one side of the adjusting plate 404, causing the adjusting cylinder 301 to translate. The present invention has a mechanism with two degrees of freedom in the plane and vertical movement, improving the applicability and flexibility of the welding equipment;

[0047] Four chutes 404a are symmetrically arranged at the top of the adjusting plate 404, and the chutes 404a correspond to the positions of the limiting clamping plates 403. The limiting blocks 405 are slidably connected inside the chutes 404a, and the first sliders 407 are slidably connected inside the chutes 404a. It should be noted that by the work of the electric push rod 402, the telescopic frame 401 rotates at an angle, which can adjust the height of the adjusting plate 404, and further realize the up and down adjustment effect of the adjusting cylinder 301, and can adapt to the welding part of the box girder steel bar skeleton, which is beneficial to improving the adaptability of the device. During the welding process, by the work of the electric push rod 402, the two telescopic frames 401 are driven to perform axial movement, and the limiting blocks 405 and the first sliders 407 slide in the chutes 404a, and the elastic force applied by the first springs 406, so as to adjust the height position of the adjusting plate 404, and further adjust the height position of the adjusting cylinder 301, preventing the welding torch 304 from colliding with the box girder steel bar skeleton during the arc movement and affecting the service life of the device.

[0048] In the embodiment of the present invention, as Figure 3 、Figure 8 and Figure 10 As shown in Figure 10 , the moving unit 6 includes a limiting cylinder 601. The limiting cylinder 601 is movably sleeved on the side surface of the adjusting cylinder 301, and the limiting cylinder 601 is sleeved inside the moving block 2. An I-shaped cylinder 602 is movably sleeved on the side surface of the limiting cylinder 601. It should be noted that the limiting cylinder 601 is rotatably connected inside the I-shaped cylinder 602 and cannot slide inside it, so as to limit the limiting cylinder 601 and prevent the limiting cylinder 601 from losing support and affecting the translation function of the adjusting cylinder 301.

[0049] A sliding cylinder 603 is fixedly sleeved inside the moving block 2, and the I-shaped cylinder 602 is slidably connected inside the sliding cylinder 603. A plurality of strip-shaped grooves 604 are symmetrically arranged at both ends of the sliding cylinder 603. A plurality of sliding blocks 605 are symmetrically fixedly connected to the inner walls on both sides of the I-shaped cylinder 602, and the sliding blocks 605 are slidably connected inside the strip-shaped grooves 604. A rotating module 7 is arranged on the inner wall of the moving block 2. It should be noted that the moving unit 6 and the adjusting component 4 have a linkage mechanism. When one of the electric push rods 402 works, the angle of the telescopic frame 401 is offset, and a force is applied to one side of the adjusting plate 404, causing the adjusting cylinder 301 to translate. By setting the moving unit 6 in the present invention, it can prevent the adjusting cylinder 301 from lacking a limiting mechanism during translation, resulting in situations such as the adjusting cylinder 301 shaking. The present invention is beneficial to improving the stability of the adjusting cylinder 301;

[0050] A plurality of limiting strips 601a are fixedly connected to the inner wall of the limiting cylinder 601 in an annular array, and the limiting strips 601a are slidably connected in the upper groove of the adjusting cylinder 301.

[0051] In the embodiment of the present invention, as shown in Figure 3 and Figure 11As shown in the figure, the rotation module 7 includes two transmission blocks 701. The two transmission blocks 701 are arranged in an annular array on the side surface of the adjustment cylinder 301, and the transmission blocks 701 are slidably connected to the upper groove of the adjustment cylinder 301. It is worth noting that the end surface of the transmission block 701 is provided with a convex block, which is adapted to the upper groove of the adjustment cylinder 301, so as to prevent the transmission block 701 from falling off the surface of the adjustment cylinder 301 when the adjustment cylinder 301 rotates, affecting subsequent use. Two mounting blocks 702 are fixedly connected to the inner wall of the moving block 2 in an annular array. Two arc-shaped outer shells 703 are movably connected to the inside of each of the two mounting blocks 702 through a fourth pin. An arc-shaped plate 704 is slidably connected to the inside of each arc-shaped outer shell 703, and the arc-shaped plate 704 is movably connected to the transmission block 701 through a fifth pin. A second sealed cavity is formed between the end of the arc-shaped plate 704 and the arc-shaped outer shell 703. Two second air pumps 705 are fixedly connected to the inner walls on both sides of the moving block 2, and the second air pumps 705 are fixedly communicated with the second sealed cavity through a second air delivery pipe. In the present invention, by setting the rotation module 7, and the rotation module 7 has a linkage mechanism with the moving unit 6. When the adjustment cylinder 301 translates, the arc-shaped telescopic rod is squeezed, so that the arc-shaped telescopic rod applies a torque to the adjustment cylinder 301, causing the adjustment cylinder 301 to rotate, and then adjusting the positions of the two groups of welding torches 304 arranged in a linear array on the plane, so as to achieve the welding effect of the welding torch 304 in a limited space. When the two groups of welding torches 304 arranged in a linear array weld the inner wall of one side of the box girder steel bar skeleton, one of the electric push rods 402 works to make the telescopic frame 401 perform an axial movement. Since the telescopic frame 401 has a stretching ability, one of the limit blocks 405 applies a thrust to the adjustment plate 404, causing the adjustment plate 404 to displace, and then realizing the translation of the adjustment cylinder 301, improving the flexibility of the welding torch 304. When the adjustment cylinder 301 translates, the arc-shaped outer shell 703 and the arc-shaped plate 704 bear the extrusion force, and this component is arc-shaped, so that the arc-shaped plate 704 applies a torque to the adjustment cylinder 301, and through an external control system, the second air pump 705 works, and the gas fills the second sealed cavity, causing the arc-shaped plate 704 to extend outward, and the generated thrust is converted into a torque, causing the adjustment cylinder 301 to rotate, realizing local linear arrangement welding treatment.

[0052] Working principle: This embodiment provides a mobile welding device for the steel frame of a prefabricated box girder of a highway. When in use, the driving module 201 is used to drive the moving block 2 to slide on the guide rail 101. When welding the intersection of the steel bars in the same axial direction, the first motor 307 is first operated through the external circuit mechanism. The first motor 307 drives the pulley 308 to rotate and transmits the power through the transmission belt 309, so that the two transmission wheels 306 rotate synchronously in the same direction. Since the transmission wheel 306 is threadedly connected to the screw rod 305, the two screw rods 305 apply thrust to the transmission plate 303, and the first support plate 302 and the second support plate 502 moves axially, so that the first support plate 302, the second support plate 502 and the transmission plate 303 are stretched apart, so that the second support plate 502 is adapted to the inner side of the box beam steel frame, and then the control system is used to make the welding gun 304 work to weld the intersection of the steel bars. When the two sets of welding guns 304 are arranged linearly, the first motor 307 works, the two transmission wheels 306 rotate synchronously in the same direction, the two screw rods 305 apply tension to the transmission plate 303, and the first support plate 302 and the second support plate 502 move axially, so that the first support plate 302 and the second support plate 502 are parallel to each other, as shown in FIG. Figure 13 and Figure 14As shown in the figure, the welding of the intersection points of the longitudinal steel bars and stirrups on both side plates is realized. When two groups of linearly arranged welding torches 304 weld the inner wall of one side of the box girder steel bar skeleton, one of the electric push rods 402 works to make the telescopic frame 401 move axially. Since the telescopic frame 401 has tensile ability, one of the limit blocks 405 applies a thrust to the adjusting plate 404, causing the adjusting plate 404 to displace, and then realizing the translation of the adjusting cylinder 301, improving the flexibility of the welding torch 304. When the adjusting cylinder 301 translates, the arc-shaped outer shell 703 and the arc-shaped plate 704 bear the extrusion force, and this component is arc-shaped, so that the arc-shaped plate 704 applies a torque to the adjusting cylinder 301. And through the external control system, the second air pump 705 works, and the gas fills the second sealed cavity, causing the arc-shaped plate 704 to extend outward, and the generated thrust is converted into torque, causing the adjusting cylinder 301 to rotate, realizing local linearly arranged welding treatment. During the welding process, through the work of the electric push rod 402, the two telescopic frames 401 are driven to move axially, and the limit block 405 and the first slider 407 slide in the chute 404a, and the elastic force applied by the first spring 406, so as to adjust the height position of the adjusting plate 404, and then adjust the height position of the adjusting cylinder 301, preventing the welding torch 304 from colliding with the box girder steel bar skeleton during the arc-shaped movement, affecting the service life of the device. When adjusting the welding angle of the welding torch 304, first, through the external control system, the first air pump 507 works, and the gas fills the first sealed cavity, applying a thrust to the second support plate 502, causing the movable rod 505 to move into the upper hole of the second hinge block 503, and through the rolling of the roller 506 in the spiral track, the second support plate 502 rotates, and then the welding point of the steel bars at the arc-shaped corner of the box girder is welded.

[0053] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention according to the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A mobile welding device for the steel bar framework of precast box girders on highways, characterized in that, It includes two bottom plates (1). On the top of each of the two bottom plates (1), two guide rails (101) are fixedly connected by first bolts. A moving block (2) is slidably connected to the top of the two guide rails (101). A driving module (201) is arranged at the bottom of the moving block (2), and a welding mechanism (3) is arranged inside the moving block (2). The welding mechanism (3) includes an adjusting cylinder (301) and an adjusting component (4). The adjusting cylinder (301) is movably sleeved on the inner wall of the moving block (2), and the adjusting component (4) is arranged on the top of the moving block (2). On the end surface of the adjusting cylinder (301) in a symmetrical structure, two first support plates (302) are movably connected by first insertion rods. At the end of each first support plate (302), two adjusting modules (5) are movably provided by first hinge frames. The ends of the two adjusting modules (5) are jointly movably connected to a transmission plate (303) by a second hinge frame. On one side of the two adjusting modules (5), a number of welding torches (304) are arranged in a linear array. On the top of the transmission plate (303) in a symmetrical structure, two lead screws (305) are fixedly connected, and the lead screws (305) pass through the adjusting cylinder (301). On the top of the two lead screws (305), transmission wheels (306) are movably connected by first threads, and the transmission wheels (306) are rotatably connected to the upper surface of the adjusting cylinder (301). A first motor (307) is fixedly sleeved on the top of the adjusting cylinder (301) by a first bracket. The output end of the first motor (307) is fixedly connected to a pulley (308). The side surfaces of the two transmission wheels (306) and the pulley (308) are jointly movably connected by a transmission belt (309). Each adjusting module (5) is composed of a first hinge block (501), a second support plate (502), and a second hinge block (503). The first hinge block (501) is movably connected to the end of the first support plate (302) by a first hinge frame. The second support plate (502) is movably connected to one side of the first hinge block (501). A first sealed cavity is formed between the second support plate (502) and the first hinge block (501) through a sealed pipe. A number of welding torches (304) are fixedly sleeved on one side of the second support plate (502) in a linear array. The second support plate (502) is movably connected to the end of the transmission plate (303) by a second hinge frame. A number of spiral strip blocks (504) are fixedly connected in a circular array in the holes on the second support plate (502), and a sliding track is formed between adjacent two spiral strip blocks (504). One end of the second support plate (502) close to the second hinge block (503) is fixedly connected to a movable rod (505). On the end surface of the movable rod (505) in a circular array, a number of rollers (506) are fixedly connected by first pins, and the rollers (506) are in rolling contact inside the sliding track. On one side of the first support plate (302), a first air pump (507) is fixedly connected by a second bracket, and the output end of the first air pump (507) is fixedly communicated with the first sealed cavity through a first air pipeline.

2. The mobile welding device for the steel bar framework of the precast box girder on the highway according to claim 1, characterized in that, The adjusting assembly (4) includes two telescopic frames (401). The two telescopic frames (401) are symmetrically and movably connected to the top of the moving block (2) by a second pin. On both inner walls of the moving block (2), two electric push rods (402) are symmetrically and movably connected by a third pin. The electric push rods (402) are movably connected to the telescopic frames (401) by a first connecting frame. On both tops, four limiting clamping plates (403) are symmetrically and movably connected by a third pin, and adjacent limiting clamping plates (403) are arranged staggeredly. An adjusting plate (404) is movably connected inside the four limiting clamping plates (403), and the top of the adjusting cylinder (301) is rotatably connected to the inside of the adjusting plate (404).

3. The mobile welding device for the steel bar framework of the precast box girder on the highway according to claim 2, characterized in that, Two limiting blocks (405) are fixedly connected inside each two opposite limiting clamping plates (403). On one side of each limiting block (405), a number of first springs (406) are fixedly connected. Each first spring (406) is fixedly connected to a first slider (407) away from the limiting block (405). A moving unit (6) is arranged inside the bottom plate (1), and the moving unit (6) is sleeved on the surface of the adjusting cylinder (301).

4. A mobile welding device for the steel bar framework of precast box girders on highways according to claim 3, characterized in that, Four sliding grooves (404a) are symmetrically arranged at the top of the adjusting plate (404), and the sliding grooves (404a) correspond to the positions of the limiting clamping plates (403). The limiting blocks (405) are slidably connected inside the sliding grooves (404a), and the first sliders (407) are slidably connected inside the sliding grooves (404a).

5. The mobile welding device for the steel bar framework of the precast box girder on the highway according to claim 4, characterized in that, The moving unit (6) includes a limiting cylinder (601). The limiting cylinder (601) is movably sleeved on the side surface of the adjusting cylinder (301), and the limiting cylinder (601) is sleeved inside the moving block (2). An I-shaped cylinder (602) is movably sleeved on the side surface of the limiting cylinder (601).

6. The mobile welding device for the steel bar framework of the precast box girder on the road according to claim 5, characterized in that, A sliding cylinder (603) is fixedly sleeved inside the moving block (2), and the I-shaped cylinder (602) is slidably connected inside the sliding cylinder (603). A number of strip-shaped grooves (604) are symmetrically arranged at both ends of the sliding cylinder (603). A number of sliding blocks (605) are symmetrically fixedly connected to both inner walls of the I-shaped cylinder (602), and the sliding blocks (605) are slidably connected inside the strip-shaped grooves (604). A rotating module (7) is arranged on the inner wall of the moving block (2).

7. A mobile welding device for the steel bar framework of a precast box girder on a highway according to claim 6, characterized in that, A number of limiting strips (601a) are fixedly connected to the inner wall of the limiting cylinder (601) in an annular array, and the limiting strips (601a) are slidably connected to the upper groove of the adjusting cylinder (301).

8. A mobile welding device for the steel bar framework of a precast box girder on a highway according to claim 7, characterized in that, The rotating module (7) includes two transmission blocks (701). The two transmission blocks (701) are arranged in an annular array on the side surface of the adjusting cylinder (301), and the transmission blocks (701) are slidably connected to the upper groove of the adjusting cylinder (301). Two mounting blocks (702) are fixedly connected to the inner wall of the moving block (2) in an annular array. Two arc-shaped outer shells (703) are movably connected inside each of the two mounting blocks (702) by a fourth pin. An arc-shaped plate (704) is slidably connected inside each arc-shaped outer shell (703).

9. The mobile welding device for the steel bar framework of a precast box girder on a highway according to claim 8, characterized in that, Moreover, the arc-shaped plate (704) is movably connected to the transmission block (701) through a fifth pin. A second sealed cavity is formed between the end of the arc-shaped plate (704) and the arc-shaped outer shell (703). Two second air pumps (705) are fixedly connected to the inner walls on both sides of the moving block (2), and the second air pumps (705) are fixedly communicated with the second sealed cavity through second air delivery pipelines.

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