A movable welding device for steel pipe fittings used in road and bridge construction

Abstract

The present invention discloses a movable welding device for steel pipe fittings used in road and bridge construction in the technical field of welding equipment, which includes a bottom bracket. A first chute and a second chute are provided on the upper surface of the bottom bracket. A slidable first fixture assembly and a second fixture assembly are provided above the bottom bracket. A multi-axis welding machine and a pretreatment assembly are provided between the first fixture assembly and the second fixture assembly. The present invention can automatically perform the positioning, movement, position adjustment and welding operations of steel pipe fittings, can be adjusted according to steel pipe fittings with different diameters, has high clamping stability and accuracy for steel pipe fittings, avoids error situations caused by repeated manual clamping, and can integrate the processing processes of various steel pipe fittings, has multiple usage functions, and can also process and weld according to the required shapes of steel pipe fittings, with good applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and specifically relates to a movable welding device for steel pipe fittings used in road and bridge construction. Background Art

[0002] Highway bridge engineering refers to all the work of the planning, design, construction, maintenance, repair, etc. of structures that cross water areas, valleys, and all traffic channels. During the construction of highway bridges, steel structural components are often used, such as side guardrails and various brackets, etc., and welding and assembly need to be carried out according to the actual situation on site. Currently, the simplest method is to use a welding machine for manual welding, which requires a high level of welding proficiency for welders, especially for the welding of steel pipe fittings.

[0003] Since the outer surface of the steel pipe fitting is cylindrical and the diameters of the steel pipe fittings are inconsistent, it is rather troublesome to clamp and fix each time during welding, and the situation of secondary clamping deviation is likely to occur. Moreover, during welding, the deviation will cause the pipe fittings to deform and twist. Therefore, an automatic welding device needs to be used for welding treatment to improve the welding accuracy. In addition, the welding of steel pipe fittings is not simply the butt welding of the end faces of the steel pipe fittings. There are cases of welding bent steel pipe fittings and inclined steel pipe fittings. At this time, the clamping stability of the fixture of the welding device is crucial. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a movable welding device for steel pipe fittings used in road and bridge construction to solve the problems raised in the above background art.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A movable welding device for steel pipe fittings used in road and bridge construction includes a bottom bracket. The upper surface of the bottom bracket is provided with a first chute and a second chute. Above the bottom bracket, there are a slidable first fixture assembly and a second fixture assembly. Between the first fixture assembly and the second fixture assembly, there are a multi-axis welding machine and a pretreatment assembly.

[0007] The first fixture assembly includes a first bracket slidably connected to the first chute. Above the first bracket, there is an axially arranged clamping block that can be rotated to adjust the angle. The first group of pipe fittings passes through the inside of the clamping block. The clamping block can be rotated to open and close, and a replaceable first clamping piece is provided at the front end of the clamping block.

[0008] The second fixture assembly includes a second bracket slidably connected to a second chute. Above the second bracket, there is a first rotating bracket rotatably connected. Inside the first rotating bracket, there is a rotatable second rotating bracket. On the second rotating bracket, there is a fixedly connected third bracket. Above the third bracket, there are a fixedly connected fourth bracket and a slidable fifth bracket. On the fourth bracket, there is a liftable fixed clamping block. On the side of the fifth bracket, there is a liftable movable clamping block. The second set of pipe fittings passes through the first rotating bracket, the second rotating bracket, the fixed clamping block, and the movable clamping block;

[0009] The pretreatment assembly includes symmetrically arranged pre-positioning modules, and a polishing module is provided between the pre-positioning modules.

[0010] Preferably, above the first bracket, there is a fixedly connected tail bracket and a side bracket. On the side of the tail bracket, there is a first electric cylinder. At the front end of the tail bracket, there is a rotatable pushing frame. The tail end of the first electric cylinder is rotatably connected to the tail bracket, and the telescopic end of the first electric cylinder is rotatably connected to the pushing frame. Inside the pushing frame, there are symmetrically arranged pushing wheels.

[0011] Preferably, inside the tail bracket, there is a through cavity. Inside the cavity, there is a rotatable feed pipe and a first rocker. Inside the feed pipe, there is a through hole communicating with the cavity. On the feed pipe, there is a fixedly connected driven bevel gear. On the first rocker, there is a fixedly connected driving bevel gear. The driving bevel gear meshes with the driven bevel gear. The clamping block is installed at the front end of the feed pipe, and a torsion spring is provided at the rotation part of the clamping block and the feed pipe.

[0012] Preferably, outside the feed pipe, there is an outer pipe in sliding fit. At the front end of the outer pipe, there is a pushing pipe. At the tail end of the outer pipe, there is an annular slot. The pushing wheels rotate inside the annular slot. When the telescopic end of the first electric cylinder advances, it drives the pushing frame to rotate. The pushing frame pushes the outer pipe and the pushing pipe forward. When the pushing pipe advances, it pushes the clamping block and the first clamping piece to rotate and close.

[0013] Preferably, at the rotation part of the second bracket and the first rotating bracket, there is an angle scale. On the first rotating bracket, there is a through first opening and a rotatably connected driving gear. The driving gear rotates through a second rocker;

[0014] Both ends of the second rotating bracket are provided with rotating columns. The rotating columns are inserted into the first opening and rotatably connected to it. Inside the rotating columns, there are through second openings. On the outside of the rotating columns, there are fixedly connected driven gears. The driven gears mesh with the driving gear. The pipe fittings can pass through the first opening and the second opening.

[0015] Preferably, on the contact surfaces of the fixed clamping block and the movable clamping block, there are replaceable second clamping pieces, and the second clamping pieces are arranged coaxially with the first opening and the second opening.

[0016] Preferably, the number of axes of the multi-axis welding machine is at least two axes.

[0017] Preferably, the pre-positioning module includes a movable sixth bracket, and a second electric cylinder is provided on the side of the sixth bracket. The telescopic end of the second electric cylinder is fixedly connected to the sixth bracket;

[0018] Above the sixth bracket, there is a rotatable third rotating bracket, and a pre-clamping block is fixedly connected to the third rotating bracket.

[0019] Preferably, the polishing module includes a rotatable fourth rotating bracket. A three-axis speed reducer and a motor are fixedly connected inside the fourth rotating bracket. Removable grinding discs are provided on the rotating shafts on both sides of the three-axis speed reducer, and the motor drives the grinding discs to rotate.

[0020] Preferably, a rotatable rotating ring and a slidably fitted third clamping piece are rotatably connected inside the pre-clamping block. The third clamping piece moves towards the center of the pre-clamping block, and a tension spring is provided at the tail. A through third opening is provided at the center of the pre-clamping block. A handle is fixedly connected to the rotating ring. An axially arranged pressing edge is provided inside the rotating ring. The pressing edge is tangent to the third clamping piece. When the rotating ring rotates, it drives the pressing edge to rotate synchronously, squeezing the third clamping piece to move forward towards the center of the pre-clamping block.

[0021] Advantages of the present invention:

[0022] A movable welding device for steel pipe fittings used in road and bridge construction according to the present invention can automatically perform positioning, moving, position adjustment, and welding operations on steel pipe fittings, can be adjusted according to steel pipe fittings with different diameters, has high clamping stability and accuracy for steel pipe fittings, avoids error situations caused by manual repeated clamping, and can integrate various steel pipe fitting processing processes into one, has multiple use functions, and can also process and weld according to the required shapes of steel pipe fittings, with good applicability;

[0023] In a movable welding device for steel pipe fittings used in road and bridge construction according to the present invention, the first clamping piece and the second clamping piece can be replaced according to actual use conditions, can be used for clamping operations on steel pipe fittings with different diameters, and will not reduce the clamping effect on steel pipe fittings. With a split clamping structure design, the overall clamping structure is movable, improving applicability;

[0024] When a simple butt joint of straight steel pipe fittings is carried out by a movable welding device for steel pipe fittings used in road and bridge construction according to the present invention, two groups of straight steel pipe fittings can be quickly and stably clamped and fixed, and can be rotated and welded synchronously. When there are burrs and unevenness on the end faces of the straight steel pipe fittings to be welded, the pretreatment assembly can clamp, polish, and grind the steel pipe fittings, and then perform subsequent welding operations, with good stability, without removing the steel pipe fittings for separate polishing, improving the accuracy of subsequent welding;

[0025] When the steel pipe component movable welding device for road and bridge construction of the present invention welds the arc-shaped steel pipe component, the arc-shaped pipe component is fixed by the second fixture assembly. The arc-shaped pipe component can be attached to the outer arc edge of the fixed clamping block, and the rotation angle of the arc-shaped pipe component can be adjusted through the third rocker, so as to change the welding angle with the straight steel pipe component;

[0026] When the steel pipe component movable welding device for road and bridge construction of the present invention welds the inclined plane steel pipe, the pre-clamping block fixes the steel pipe component, rotates the angles of the third rotating bracket and the fourth rotating bracket, and then the second electric cylinder pulls the pipe component forward for grinding. After grinding, the two groups of pipe components are fixed by the first fixture assembly and the second fixture assembly, and then moved under the multi-axis welding machine for welding. Rotate the angles of the first rotating bracket and the second rotating bracket to adjust the position of the second group of pipe components, drive the first group of pipe components to rotate and adjust the position through the first rocker. After the grinding end faces of the two groups of pipe components are in contact, the multi-axis welding machine performs automatic welding. Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic top view of the structure of a steel pipe component movable welding device for road and bridge construction in an embodiment of the present invention;

[0029] Figure 2 It is a schematic front view of the structure of a steel pipe component movable welding device for road and bridge construction in an embodiment of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the first fixture assembly in an embodiment of the present invention;

[0031] Figure 4 It is a schematic sectional view of the structure of the first fixture assembly in an embodiment of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the second fixture assembly in an embodiment of the present invention;

[0033] Figure 6 It is a schematic sectional view of the structure of the second fixture assembly in an embodiment of the present invention;

[0034] Figure 7 It is a partial structure schematic diagram of the second fixture assembly in an embodiment of the present invention Figure 1 ;

[0035] Figure 8It is a partial structural schematic diagram of the second fixture assembly in the embodiment of the present invention Figure 2 ;

[0036] Figure 9 It is a partial structural schematic diagram of a movable welding device for steel pipe fittings used in road and bridge construction in the embodiment of the present invention;

[0037] Figure 10 It is a structural schematic diagram of the pretreatment assembly in the embodiment of the present invention;

[0038] Figure 11 It is a sectional structural schematic diagram of the pre-clamping block in the embodiment of the present invention;

[0039] In the figure: 1, bottom bracket; 2, first fixture assembly; 3, second fixture assembly; 4, multi-axis welding machine; 5, pretreatment assembly; 11, first chute; 12, second chute; 21, first bracket; 22, tail bracket; 23, outer pipe; 24, clamping block; 31, second bracket; 32, first rotating bracket; 33, second rotating bracket; 34, third bracket; 51, sixth bracket; 52, third rotating bracket; 53, fourth rotating bracket; 54, pre-clamping block; 211, side bracket; 221, first electric cylinder; 222, pushing frame; 223, feeding pipe; 224, first rocker; 231, pushing pipe; 232, annular slot; 241, first clamping piece; 321, first opening; 322, driving gear; 323, second rocker; 331, rotating column; 332, moving gear; 341, fourth bracket; 342, fixed clamping block; 343, second clamping piece; 344, fifth bracket; 345, third rocker; 346, movable clamping block; 511, second electric cylinder; 531, grinding piece; 541, rotating ring; 542, third opening; 543, third clamping piece; 2231, driven bevel gear; 2241, driving bevel gear; 5411, pressing edge; 5412, handle. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] Please refer to Figures 1 to 11As shown in the figure, this embodiment provides a movable welding device for steel pipe fittings used in road and bridge construction, including a bottom bracket 1. Movable wheels are installed at the bottom end of the bottom bracket 1 and it is moved by pulling with an engineering vehicle. A first chute 11 and a second chute 12 are provided on the upper surface of the bottom bracket 1. A slidable first fixture assembly 2 and a second fixture assembly 3 are provided above the bottom bracket 1. A multi-axis welding machine 4 and a pretreatment assembly 5 are provided between the first fixture assembly 2 and the second fixture assembly 3.

[0042] Further, the first fixture assembly 2 includes a first bracket 21. The first bracket 21 is slidably connected to the first chute 11. A tail bracket 22 and a side bracket 211 which are fixedly connected are provided above the first bracket 21. A first electric cylinder 221 is provided on the side of the tail bracket 22. A rotatable push frame 222 is provided at the front end of the tail bracket 22. The tail end of the first electric cylinder 221 is rotatably connected to the tail bracket 22, and the telescopic end of the first electric cylinder 221 is rotatably connected to the push frame 222. Symmetrical push wheels are provided inside the push frame 222.

[0043] A through cavity is provided inside the tail bracket 22. A rotatable feed pipe 223 and a first rocker 224 are provided inside the cavity. The feed pipe 223 is internally provided with a through cavity. A driven bevel gear 2231 is fixedly connected to the feed pipe 223. A driving bevel gear 2241 is fixedly connected to the first rocker 224. The driving bevel gear 2241 meshes with the driven bevel gear 2231. By rotating the first rocker 224, the feed pipe 223 can be driven to rotate. Axially arranged clamping blocks 24 are provided at the front end of the feed pipe 223. A torsion spring is provided at the rotating part of the clamping block 24 and the feed pipe 223. In the absence of external force, the clamping block 24 is driven by the torsion spring to expand. A replaceable first clamping piece 241 is provided at the front end of the clamping block 24. Different first clamping pieces 241 are replaced according to the different diameters of the pipe fittings to be processed, so as to change the clamping diameter of the clamping block 24.

[0044] An outer pipe 23 which is in sliding fit is provided outside the feed pipe 223. A push pipe 231 is provided at the front end of the outer pipe 23. An annular slot 232 is provided at the tail end of the outer pipe 23. The push wheels rotate inside the annular slot 232. When the telescopic end of the first electric cylinder 221 advances, it drives the push frame 222 to rotate. The push frame 222 pushes the outer pipe 23 and the push pipe 231 forward. When the push pipe 231 advances, it drives the clamping block 24 and the first clamping piece 241 to rotate and close. The pipe fitting is inserted into the first fixture assembly 2 through the tail end of the feed pipe 223, and the front end of the pipe fitting extends out between the first clamping pieces 241. Then the first electric cylinder 221 pushes the outer pipe 23 and the push pipe 231 forward to drive the clamping block 24 and the first clamping piece 241 to rotate and close to clamp and fix the pipe fitting.

[0045] Further, the second fixture assembly 3 includes a second support 31. The first support 21 is slidably connected to the second chute 12. Above the second support 31, there is a first rotating support 32 rotatably connected. An angle scale is provided at the rotation point between the second support 31 and the first rotating support 32. After the first rotating support 32 rotates and adjusts the angle, it can be fixed by means such as magnetic attraction and fasteners. The first rotating support 32 is in a "U" shape. There is a through first opening 321 and a rotatably connected driving gear 322 on the first rotating support 32. The driving gear 322 rotates through a second rocker 323;

[0046] Inside the first rotating support 32, there is a rotatable second rotating support 33. Both ends of the second rotating support 33 are provided with rotating columns 331. The rotating columns 331 are inserted into the first opening 321 and rotatably connected thereto. There is a through second opening inside the rotating column 331. A driven gear 332 fixedly connected is provided on the outside of the rotating column 331. The driven gear 332 meshes with the driving gear 322. The second rocker 323 can drive the driven gear 332, the rotating column 331, and the second rotating support 33 to rotate. The pipe fitting can pass through the first opening 321 and the second opening;

[0047] Between the rotating columns 331, there is a third support 34 fixedly connected to the second rotating support 33. Above the third support 34, there are a fixedly connected fourth support 341, a slidable fifth support 344, and a rotatable third rocker 345. A liftable fixed clamp block 342 is provided on the fourth support 341. A liftable movable clamp block 346 is provided on the side of the fifth support 344. The heights of the fixed clamp block 342 and the movable clamp block 346 are adjusted according to the heights of the first opening 321 and the second opening;

[0048] Replaceable second clamping pieces 343 are provided on the contact surfaces of the fixed clamp block 342 and the movable clamp block 346. The second clamping pieces 343 are connected to the fixed clamp block 342 and the movable clamp block 346 by magnetic attraction. Second clamping pieces 343 with different inner diameters are replaced according to the diameter of the pipe fitting to be clamped. The fifth support 344 is slidably connected to the third support 34 through a slide rail and slider assembly. The third rocker 345 is in threaded cooperation with the third support 34. The front end of the third rocker 345 is rotatably connected to the fifth support 344. The distance between the fifth support 344 and the fixed clamp block 342 can be adjusted by driving the fifth support 344 through the third rocker 345.

[0049] Further, the number of axes of the multi-axis welding machine 4 needs to be at least two axes, that is, X and Y axis movement. The movement of the welding machine is driven by an electric slide table or a screw and slider, and welding can be performed by setting a program or manual control.

[0050] Further, the preprocessing component 5 includes symmetrically arranged pre-positioning modules, with a polishing module disposed between the pre-positioning modules. The pre-positioning module includes a movable sixth bracket 51, and the sixth bracket 51 is guided for movement through a slide rail and slider. A second electric cylinder 511 is provided on the side of the sixth bracket 51, and the telescopic end of the second electric cylinder 511 is fixedly connected to the sixth bracket 51, and the second electric cylinder 511 pulls the sixth bracket 51 to move;

[0051] Above the sixth bracket 51, there is a rotatable third rotating bracket 52. A pointer is provided at the top of the sixth bracket 51, and a scale is provided at the edge of the third rotating bracket 52. The third rotating bracket 52 is rotated manually or electrically, and a pre-clamping block 54 is fixedly connected to the third rotating bracket 52;

[0052] The polishing module includes a fourth rotating bracket 53. A scale is also provided at the rotating part below the fourth rotating bracket 53. The fourth rotating bracket 53 is adjusted in angle manually or electrically. A three-axis reduction gear and a motor are fixedly connected inside the fourth rotating bracket 53. Detachable grinding discs 531 are provided on both side shafts of the three-axis reduction gear, and the motor drives the grinding discs 531 to rotate;

[0053] Inside the pre-clamping block 54, there is a rotatably connected rotating ring 541 and a third clamping piece 543 in sliding fit. A torsion spring is provided at the rotating part of the rotating ring 541. After pulling the rotating ring 541 to rotate and then releasing the external force, the torsion spring drives it to automatically reverse and return to its position. The third clamping piece 543 moves towards the center of the pre-clamping block 54, and a tension spring is provided at the tail. A through third opening 542 is provided at the center of the pre-clamping block 54. A handle 5412 is fixedly connected to the rotating ring 541. A pressing edge 5411 is axially arranged inside the rotating ring 541, and the pressing edge 5411 is tangent to the third clamping piece 543. When there is no external force, the tension spring pulls the third clamping piece 543 to expand and retreat, and the third clamping piece 543 is blocked by the pressing edge 5411. The rotating ring 541 can be pulled to rotate through the handle 5412. When the rotating ring 541 rotates, it drives the pressing edge 5411 to rotate synchronously, squeezing the third clamping piece 543 to move towards the center of the pre-clamping block 54. When the pipe fitting is inserted into the third opening 542, it can be fixed by the third clamping piece 543.

[0054] Working principle:

[0055] During use, first pull the welding device to the use location, power it on, and then fix the position of the welding device. After the position fixing is completed, perform the welding operation;

[0056] Case 1: When simple butt welding of straight steel pipe fittings is required, first replace the first clamping piece 241 and the second clamping piece 343 according to the diameter of the steel pipe fitting to be clamped. Insert the first group of pipe fittings into the first fixture assembly 2 through the end of the feed pipe 223. The front end of the pipe fitting extends out between the first clamping pieces 241. Then, the first electric cylinder 221 pushes the outer pipe 23 and the push pipe 231 forward to push the clamping block 24, and the first clamping piece 241 rotates and closes to clamp and fix the first group of pipe fittings. Then, move the first fixture assembly 2 and the first group of pipe fittings along the first sliding groove 11 to the lower part of the multi-axis welding machine 4. The second group of pipe fittings passes through the first opening 321 and the second opening, and drives the fifth bracket 344 to move through the third rocker 345 to adjust the distance between the movable clamping block 346 and the fixed clamping block 342. The second clamping piece 343 stops advancing after clamping the second group of pipe fittings. Then, move the second fixture assembly 3 and the second group of pipe fittings along the second sliding groove 12 to the lower part of the multi-axis welding machine 4. Stop when the end faces of the first group of pipe fittings and the second group of pipe fittings are in contact. The multi-axis welding machine 4 first performs spot welding, then releases the second clamping piece 343, and drives the feed pipe 223, the clamping block 24, the first group of pipe fittings, and the second group of pipe fittings to rotate synchronously through the first rocker 224. The multi-axis welding machine 4 welds and connects the two. After welding is completed, the outer pipe 23 retracts, the clamping block 24 expands, and the welded pipe fittings are removed;

[0057] Case 2: When the end faces of the straight steel pipe fittings to be welded have burrs and unevenness, first pull the first fixture assembly 2 and the second fixture assembly 3 to both sides of the pretreatment assembly 5. At this time, the feed pipe 223, the first opening 321, the second opening, and the third opening 542 are coaxial. Then insert the two groups of pipe fittings into the feed pipe 223, the first opening 321, and the second opening. The front ends of the two groups of pipe fittings extend out after entering the third opening 542. Pull the handle 5412 to drive the rotating ring 541 to rotate, and squeeze the third clamping piece 543 to clamp and center the pipe fittings. The grinding piece 531 starts to rotate. Then, the second electric cylinder 511 pulls the two groups of pre-clamping blocks 54 close to the grinding piece 531, and the front ends of the two groups of pipe fittings contact the grinding piece 531 for grinding and polishing. After grinding and polishing are completed, the second electric cylinder 511 drives the pipe fittings to retract, releases the handle 5412, and then repeats the above Case 1 for welding;

[0058] Case 3: When one group of the steel pipe fittings to be welded is arc-shaped, such as welding a "J"-shaped steel pipe fitting, first replace the fixed clamping block 342 with different radian. First, fix the two groups of pipe fittings according to Case 1. The straight steel pipe fitting is fixed by the first fixture assembly 2, and the arc-shaped pipe fitting is fixed by the second fixture assembly 3. At this time, the arc-shaped pipe fitting is attached to the outer arc edge of the fixed clamping block 342. The rotation angle of the arc-shaped pipe fitting can be adjusted through the third rocker 345, so as to change the welding angle with the straight steel pipe fitting. Then, perform welding according to Case 1;

[0059] Case 4: When the steel pipe fittings to be welded need to be welded obliquely, first fix the pipe fittings and the pre-clamping block 54 according to Case 2. At this time, the pipe fittings do not need to be inserted into the feed pipe 223, the first opening 321, and the second opening. Then, rotate the angles of the third rotating bracket 52 and the fourth rotating bracket 53. Then, the second electric cylinder 511 pulls the pipe fittings forward for grinding. After grinding, fix the two groups of pipe fittings through the first fixture assembly 2 and the second fixture assembly 3. Then, move them under the multi-axis welding machine 4 for welding. Rotate the angles of the first rotating bracket 32 and the second rotating bracket 33 to adjust the position of the second group of pipe fittings. Drive the first group of pipe fittings to rotate and adjust the position through the first rocker 224. After the grinding end faces of the two groups of pipe fittings are in contact, the multi-axis welding machine 4 performs automatic welding.

[0060] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0061] In the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0063] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0064] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A movable welding device for steel pipe fittings in road and bridge construction, including a bottom bracket (1), characterized in that, The upper surface of the bottom bracket (1) is provided with a first chute (11) and a second chute (12). Above the bottom bracket (1), a slidable first fixture assembly (2) and a second fixture assembly (3) are provided. Between the first fixture assembly (2) and the second fixture assembly (3), a multi-axis welding machine (4) and a pretreatment assembly (5) are provided; The first fixture assembly (2) includes a first bracket (21) slidably connected to the first chute (11). Above the first bracket (21), a clamping block (24) that can be rotated to adjust the angle is axially provided. The first group of pipe fittings passes through the inside of the clamping block (24). The clamping block (24) can be rotated to open and close, and a replaceable first clamping piece (241) is provided at the front end of the clamping block (24); The second fixture assembly (3) includes a second bracket (31) slidably connected to the second chute (12). Above the second bracket (31), a first rotating bracket (32) is rotatably connected. Inside the first rotating bracket (32), a second rotating bracket (33) that can be rotated is provided. A third bracket (34) is fixedly connected to the second rotating bracket (33). Above the third bracket (34), a fourth bracket (341) fixedly connected and a fifth bracket (344) slidable are provided. A fixed clamping block (342) that can be lifted is provided on the fourth bracket (341). A movable clamping block (346) that can be lifted is provided on the side of the fifth bracket (344). The second group of pipe fittings passes through the first rotating bracket (32), the second rotating bracket (33), the fixed clamping block (342), and the movable clamping block (346); The pretreatment assembly (5) includes symmetrically arranged pre-positioning modules, and a polishing module is provided between the pre-positioning modules; Above the first bracket (21), a tail bracket (22) and a side bracket (211) are fixedly connected. A through cavity is provided inside the tail bracket (22). Inside the cavity, a feeding pipe (223) and a first rocker (224) that can be rotated are provided. An outer pipe (23) that is slidably fitted is provided outside the feeding pipe (223). A pushing pipe (231) is provided at the front end of the outer pipe (23). An annular slot (232) is provided at the tail end of the outer pipe (23). A driving wheel rotates inside the annular slot (232). When the telescopic end of the first electric cylinder (221) advances, it drives the pushing frame (222) to rotate. The pushing frame (222) pushes the outer pipe (23) and the pushing pipe (231) forward. When the pushing pipe (231) advances, it pushes the clamping block (24) and the first clamping piece (241) to rotate and close; The pre-positioning module includes a movable sixth bracket (51). Above the sixth bracket (51), a third rotating bracket (52) that can be rotated is provided. A pre-clamping block (54) is fixedly connected to the third rotating bracket (52); The inside of the pre-clamping block (54) is provided with a rotatably connected rotating ring (541) and a third clamping piece (543) in sliding fit. The third clamping piece (543) moves towards the center of the pre-clamping block (54), and a tension spring is provided at the tail. A through third opening (542) is provided at the center of the pre-clamping block (54). A handle (5412) is fixedly connected to the rotating ring (541). An axially arranged pressing edge (5411) is provided inside the rotating ring (541). The pressing edge (5411) is tangent to the third clamping piece (543). When the rotating ring (541) rotates, it drives the pressing edge (5411) to rotate synchronously, squeezing the third clamping piece (543) to move forward towards the center of the pre-clamping block (54).

2. The movable welding device for steel pipe fittings used in road and bridge construction according to claim 1, characterized in that, A first electric cylinder (221) is provided on the side of the tail bracket (22). A rotatable pushing frame (222) is provided at the front end of the tail bracket (22). The tail end of the first electric cylinder (221) is rotatably connected to the tail bracket (22), and the telescopic end of the first electric cylinder (221) is rotatably connected to the pushing frame (222). Symmetrical pushing wheels are provided inside the pushing frame (222).

3. The movable welding device for steel pipe fittings used in road and bridge construction according to claim 2, wherein, The inside of the feed pipe (223) is provided with a through cavity. A driven bevel gear (2231) is fixedly connected to the feed pipe (223). A driving bevel gear (2241) is fixedly connected to the first rocker (224). The driving bevel gear (2241) meshes with the driven bevel gear (2231). The clamping block (24) is installed at the front end of the feed pipe (223). A torsion spring is provided at the rotating part of the clamping block (24) and the feed pipe (223).

4. A movable welding device for steel pipe fittings used in road and bridge construction according to claim 1, characterized in that, An angle gauge is provided at the rotating part of the second bracket (31) and the first rotating bracket (32). A through first opening (321) and a rotatably connected driving gear (322) are provided on the first rotating bracket (32). The driving gear (322) rotates through the second rocker (323). Both ends of the second rotating bracket (33) are provided with rotating columns (331). The rotating columns (331) are inserted into the first opening (321) and rotatably connected thereto. A through second opening is provided inside the rotating columns (331). A driven gear (332) is fixedly connected to the outside of the rotating columns (331). The driven gear (332) meshes with the driving gear (322). The pipe fitting can pass through the first opening (321) and the second opening.

5. A movable welding device for steel pipe fittings used in road and bridge construction according to claim 4, characterized in that, Replaceable second clamping pieces (343) are provided on the contact surfaces of the fixed clamping block (342) and the movable clamping block (346). The second clamping pieces (343) are arranged coaxially with the first opening (321) and the second opening.

6. The movable welding device for steel pipe fittings used in road and bridge construction according to claim 1, wherein, The number of axes of the multi-axis welding machine (4) is at least two axes.

7. A movable welding device for steel pipe fittings used in road and bridge construction according to claim 1, characterized in that, A second electric cylinder (511) is provided on the side of the sixth bracket (51). The telescopic end of the second electric cylinder (511) is fixedly connected to the sixth bracket (51).

8. A movable welding device for steel pipe fittings used in road and bridge construction according to claim 1, characterized in that, The polishing module includes a rotatable fourth rotating bracket (53). A three-axis speed reducer and a motor are fixedly connected inside the fourth rotating bracket (53). Removable grinding discs (531) are provided on the rotating shafts on both sides of the three-axis speed reducer. The motor drives the grinding discs (531) to rotate.

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