A steel-lined polytetrafluoroethylene pipe welding device

Abstract

The present invention discloses a welding device for a steel-lined polytetrafluoroethylene pipe, which relates to the technical field of pipe welding. The welding device for the steel-lined polytetrafluoroethylene pipe includes a welding gun head, a rotating shaft seat arranged on one side of the welding gun head, inner support plates arranged on at least two sides of an inner support cylinder, and a braking source arranged on the side of a braking cylinder away from the rotating shaft seat. Through the variable-direction displacement of a variable-direction driving structure driven by a braking handle in the braking source, on the one hand, the braking force is variably transmitted to an inner support driving assembly to push the inner support plates to expand oppositely with the inner support cylinder as the axis, replacing the self-support of the device body, and co-axially supporting with the pipe to be welded. On the other hand, the braking force is variably transmitted to a rotating driving assembly to push the rotating shaft seat to rotate circumferentially with the inner support cylinder as the axis, and then push the welding gun head to rotate circumferentially along the welding pipe to perform circumferential welding work on the pipe flange. It replaces the traditional way of self-rotating welding of pipes, and the braking continuity of welding is smoother and the welding is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline welding, in particular to a steel-lined polytetrafluoroethylene pipe welding device. Background Art

[0002] In the actual production process of steel-lined pipes, in order to better connect the pipes, flanges are usually provided at the pipe ends, so as to utilize the sealing connection between the flanges to realize the connection and laying of the steel-lined pipes. For example, the Chinese patent with publication number CN118951457A discloses a pipe flange welding device. When welding the pipe flange, this type of equipment drives the flange and the pipe to rotate as a whole through the flange clamping mechanism, and while rotating, the welding mechanism is used to realize the welding of the pipe flange. However, in the process of pipe flange welding, especially for the welding of large-sized pipe flanges, the existing welding method has a large load brake, poor continuous stability for the rotation drive of the pipe, and the rotating pipe is prone to brake deviation, resulting in poor welding continuity and accuracy of the pipe flange, and the welding quality cannot be guaranteed. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a steel-lined polytetrafluoroethylene pipe welding device, which solves the problems raised in the background technology. To achieve the above objectives, the present invention is implemented through the following technical solutions: a steel-lined polytetrafluoroethylene pipe welding device, comprising: a welding gun head; a rotating shaft seat, the rotating shaft seat is located on one side of the welding gun head; a rotating frame, the rotating frame is located between the rotating shaft seat and the welding gun head, and is used to transmit the rotational force of the rotating shaft seat to the welding gun head; a brake cylinder, the brake cylinder is arranged along the axial direction of the rotating shaft seat, one end of the brake cylinder is coaxially connected to the inner support cylinder, and the brake cylinder is provided with a rotating structure for driving the rotating shaft seat to rotate, so that the rotating shaft seat is rotated and transmitted along the axis of the inner support cylinder; an inner support plate, the inner support plate is located on at least two sides of the inner support cylinder, and the inner support cylinder is provided with an expansion structure for supporting the expansion displacement of the inner support plate, so that the inner support cylinder and the welding pipe are kept fixed on the same axis; a braking source, the braking source is located on the side of the brake cylinder away from the rotating shaft seat, the braking source is used to drive the inner support plate to expand and support in opposite directions and to drive the rotating shaft seat to rotate, so that the rotating shaft seat in a rotating state drives the welding gun head to rotate along the axis of the inner support cylinder.

[0004] Furthermore, the rotating structure includes a transmission sprocket, which is arranged on one side of the rotating shaft seat, and a transmission gear is meshed and connected inside the transmission sprocket; it also includes: a rotating shaft, which is arranged in the brake cylinder away from the rotating shaft seat, and a second spline shaft is provided at one end of the rotating shaft; a transmission shaft, which is arranged on the brake cylinder, and the transmission shaft is provided with a supporting sleeve fixedly connected to the brake cylinder along its axial direction, one end of the transmission shaft is connected to the transmission gear, and the other end of the transmission shaft is connected to the rotating shaft through a transmission belt, so that the rotational braking force of the second spline shaft is transmitted to the rotating shaft seat, driving the welding gun head to rotate along the axis of the inner support cylinder.

[0005] Further, the expansion and support structure includes an inner support shaft disposed inside an inner support cylinder. One end of the inner support shaft is provided with a first spline shaft extending into the brake cylinder. It further includes: a rotating shaft sleeve, which is provided in not less than one group along the axial direction of the inner support shaft. One side of the rotating shaft sleeve is provided with an orbital disc, which is of a spiral structure. The spiral guide rail of the orbital disc is provided with track sliders having the same number as the inner support plates. When the orbital disc is in a rotating state, the spiral thrust is converted into an expansion and support thrust and transmitted to the track sliders, pushing the inner support plates to expand oppositely with the inner support cylinder as the axis.

[0006] Further, the braking source includes a brake shaft penetrating the rotating shaft and axially opposite to the inner support shaft, and a brake handle slidably disposed on the brake cylinder. The brake handle is used to transmit the braking force of the brake shaft to the rotating shaft or the inner support shaft. Wherein, one end of the brake shaft is provided with a rhombic braking end; one end of the brake handle is provided with a direction-changing driving structure, and the direction-changing driving structure has a rhombic through groove guiding and sliding with the rhombic braking end. When the direction-changing driving structure slides in a direction-changing manner, it remains in a locked state with the first spline shaft or the second spline shaft, driving the inner support shaft or the rotating shaft to rotate.

[0007] Further, the direction-changing driving structure includes a limit shaft collar disposed at one end of the brake handle. The inside of the limit shaft collar is rotatably connected with a brake shaft sleeve. One end of the brake shaft sleeve is provided with a first spline tooth sleeve locked and connected with the first spline shaft, and the other end of the brake shaft sleeve is provided with a second spline tooth sleeve locked and connected with the second spline shaft.

[0008] Further, the other end of the brake cylinder has a flange support end, and the flange support end is fixed on a support seat. A support shell is sleeved on the support seat in a surrounding manner. A variable cavity is spaced between the support shell and the support seat, enabling the inner support cylinder to have an independent displacement when expanding and welding a pipeline, and being coaxial with the axis of the welded pipeline. Wherein, an elastic support structure for enabling the support seat to displace variably along the variable cavity is provided inside the support shell, enabling the support seat to elastically displace variably and reset along the variable cavity.

[0009] Further, the elastic support structure includes an elastic support assembly disposed inside the support shell and connected with the support seat, and a variable gap opened along the variable cavity, enabling the support seat to elastically displace variably along the variable gap through the elastic support assembly. Among them, the elastic support assembly includes: an annular guide rod, which is arranged circumferentially along the support shell. The annular guide rod is provided with not less than one group of fixing blocks, enabling the annular guide rod to be fixed on the support shell through the fixing blocks; elastic sliders, which are sleeved on the annular guide rod in a pairwise opposite form and approach both sides of the fixing blocks oppositely. One side of the elastic slider is provided with a buffer spring sleeved on the annular guide rod and seated on the fixing block, and the other side of the elastic slider is provided with an elastic band connected with the support seat, enabling the support seat to have elastic variable displacement and elastic support along the variable gap.

[0010] Furthermore, the elastic support structure includes a magnetic support component arranged in the support shell and connected to the support seat, and a magnetic variable gap opened along the variable cavity, so that the support seat is magnetically variable displaced along the magnetic variable gap through the magnetic support component, wherein; the magnetic support component includes: a magnetic ring, which is sleeved on the support seat; a bottom support platform, which is located on at least one side of the lower half of the support shell, and a first magnetic block that magnetically repels the magnetic ring is provided on the bottom support platform, so that the support seat does not collide with the bottom of the support shell under the magnetic repulsion between the first magnetic block and the magnetic ring; a top support platform, which is located on at least one side of the upper half of the support shell, and a second magnetic block that is magnetically fixed to the magnetic ring is provided on the top support platform, and at least one group of compression springs are provided between the top support platform and the second magnetic block, so that the support seat has magnetic variable displacement and magnetic support along the magnetic variable gap under the magnetic attraction of the second magnetic block and the magnetic ring.

[0011] Furthermore, a calibration structure for driving the angular displacement of the welding gun head is provided in the rotating frame, so that the nozzle angle of the welding gun head can be adjusted and calibrated, wherein: the calibration structure comprises: a screw shaft, the screw shaft is slidably arranged along the direction of the rotating frame bracket, a rotating seat supporting the welding gun head is provided in a ring sleeve in the middle of the screw shaft, one end of the screw shaft has a threaded end, and a positioning bolt is threadedly screwed on the threaded end, so that the positioning bolt applies a thread tightening pressure on the rotating frame along the axial direction of the screw shaft; a limiting groove, the limiting groove is set to be no less than one group, and the limiting groove is arranged along the side of the rotating frame The rack is arranged, and the staggered positioning bolts on the screw shaft are provided with positioning washers opposite to the limiting grooves, so that the positioning bolts are pressed tightly against the positioning washers into the limiting grooves; the calibration structure also includes: a locking gear sleeve, which is arranged on the rotating seat; a clamping screw rod, which is arranged inside the screw shaft, and a knob is provided at one end of the clamping screw rod, and the clamping screw rod is provided with positive and negative thread teeth with the center line as the boundary, and two groups of clamping screw sleeves are provided on the positive and negative thread teeth, and the two groups of clamping screw sleeves are provided with locking racks in opposite forms for unlocking and locking with the locking gear sleeve.

[0012] Further, one end of the brake cylinder is provided with not less than one group of first convex edges, and first positioning jacks are opened on the first convex edges; one end of the inner support cylinder is provided with not less than one group of second convex edges, and second positioning jacks are opened on the second convex edges; the first convex edges and the second convex edges overlap with each other in a staggered manner, and a parallel locking component for integrally limiting and fixing them is sleeved on the butting end ring of the first convex edges and the second convex edges, wherein: the parallel locking component includes: a limiting ring sleeve, which is axially slidably arranged along the brake cylinder and the inner support cylinder, and not less than two groups of threaded sleeves are arranged along the circumferential direction of the limiting ring sleeve; a positioning insertion rod, which is inserted through the threaded sleeve in a penetrating manner, and a positioning plug opposite to the first positioning jack and the second positioning jack is arranged on the positioning insertion rod, and a return spring for providing pressure to the positioning plug is sleeved on the positioning insertion rod, so that the positioning plug is inserted into the first positioning jack and the second positioning jack to realize the coaxial assembly of the brake cylinder and the inner support cylinder, and locking threads screwed with the threaded sleeve are arranged on the positioning insertion rod, so that the positioning plug is far away from the first positioning jack and the second positioning jack to realize the disassembly and assembly of the brake cylinder and the inner support cylinder.

[0013] The present invention has the following beneficial effects:

[0014] 1. For the steel-lined polytetrafluoroethylene pipe welding device, after the inner support cylinder is moved into the welding pipe, the variable displacement of the steering drive structure is driven by the brake handle in the brake source. On the one hand, the braking force is variably transmitted to the inner support drive assembly to push the inner support plate to expand oppositely with the inner support cylinder as the axis, replacing the self-support of the device body, coaxial supporting with the welding pipe to be welded, and forming a supporting state with the axis of the welding pipe as the fixed point. On the other hand, the braking force is variably transmitted to the rotary drive assembly to push the rotating shaft seat to rotate circumferentially with the inner support cylinder as the axis, and then push the welding gun head to rotate circumferentially along the welding pipe to perform circumferential welding work on the pipe flange. It replaces the traditional way of self-rotating welding of pipes, and the welding braking continuity is smoother and the welding is more accurate.

[0015] 2. For the steel-lined polytetrafluoroethylene pipe welding device, by arranging an elastic support structure between the support shell and the support seat, as a variable support component, it provides a variable space for the inner support cylinder to penetrate into the welding pipe, so that the inner support cylinder and the welding pipe maintain coaxial support. Then, through the elastic support of the elastic support component in the elastic support structure, using the large variable displacement characteristic of the elastic support component, the inner support cylinder penetrates into and adapts to the inner support fixation of large-size welding pipes, and through the magnetic support of the magnetic support component in the elastic support structure, using the micro-variable displacement characteristic of the magnetic support component, the inner support cylinder penetrates into and adapts to the inner support fixation of small-size welding pipes to adapt to the coaxial support work of different-size welding pipes.

[0016] 3. The steel-lined polytetrafluoroethylene pipe welding device can, by setting a positioning structure on the welding gun head and using its knob adjustment feature, adjust the welding height and welding angle of the welding gun head in real time, so as to accurately align the weld of the pipe and the flange, improving the welding accuracy.

[0017] 4. The steel-lined polytetrafluoroethylene pipe welding device can, by setting a parallel locking component between the brake cylinder and the inner support cylinder and using the integrated self-locking and split positioning unlocking of the parallel locking component, on the one hand, have the characteristic of interlocking and fixing, keeping the brake cylinder and the inner support cylinder coaxially arranged, and on the other hand, facilitating the disassembly and assembly process of the brake cylinder and the inner support cylinder, so as to facilitate subsequent disassembly, assembly and maintenance processes.

[0018] 5. The steel-lined polytetrafluoroethylene pipe welding device can, by adding a combination of a rotary electric cylinder and a rotary arm to the rotary frame supporting the welding gun head, additionally add a set of welding gun heads to realize the double-sided linkage welding of the flange, so as to adapt to the double-sided welding of large-size flange welds, improving the comprehensiveness of welding while reducing the complexity of welding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic three-dimensional structure diagram of Embodiment 1 of the present invention; Figure 1 ;

[0020] Figure 2 is a schematic three-dimensional structure diagram of Embodiment 1 of the present invention; Figure 2 ;

[0021] Figure 3 is an assembly schematic diagram of the inner support cylinder and the inner support plate in Embodiment 1 of the present invention;

[0022] Figure 4 is a schematic structural diagram of the inner support drive assembly in Embodiment 1 of the present invention;

[0023] Figure 5 is a schematic structural diagram of the rotary drive assembly in Embodiment 1 of the present invention;

[0024] Figure 6 is a partial cross-sectional view of the rotary drive assembly in Embodiment 1 of the present invention;

[0025] Figure 7 is a schematic structural diagram of the drive source in Embodiment 1 of the present invention;

[0026] Figure 8 is a schematic structural diagram of the direction-changing drive structure in Embodiment 1 of the present invention;

[0027] Figure 9 is a first partial cross-sectional view of the direction-changing drive structure in Embodiment 1 of the present invention;

[0028] Figure 10It is the second partial cross-sectional view of the direction-changing drive structure in the first embodiment of the present invention;

[0029] Figure 11 It is the first structural schematic diagram of the alignment structure in the first embodiment of the present invention;

[0030] Figure 12 It is the second structural schematic diagram of the alignment structure in the first embodiment of the present invention;

[0031] Figure 13 It is the exploded view of the alignment structure in the first embodiment of the present invention;

[0032] Figure 14 It is for the first embodiment of the present invention Figure 13 The enlarged view of part A;

[0033] Figure 15 It is the assembly schematic diagram of the support shell and the support seat in the first embodiment of the present invention;

[0034] Figure 16 It is the assembly schematic diagram of the elastic support assembly in the first embodiment of the present invention;

[0035] Figure 17 It is the assembly schematic diagram of the magnetic support assembly in the first embodiment of the present invention;

[0036] Figure 18 It is the welding processing schematic diagram of the first embodiment of the present invention;

[0037] Figure 19 It is the assembly schematic diagram of the parallel locking assembly in the first embodiment of the present invention;

[0038] Figure 20 It is the partial cross-sectional view of the parallel locking assembly in the first embodiment of the present invention;

[0039] Figure 21 It is the three-dimensional structure schematic of the second embodiment of the present invention Figure 1 ;

[0040] Figure 22 It is the three-dimensional structure schematic of the second embodiment of the present invention Figure 2 ;

[0041] Figure 23 It is for the first embodiment of the present invention Figure 20 The enlarged view of part B.

[0042] In the figure, 1 is the track platform; 2 is the support shell; 3 is the support base; 4 is the braking motor; 5 is the braking cylinder; 6 is the inner support cylinder; 7 is the inner support plate; 8 is the rotating shaft seat; 9 is the rotating frame; 10 is the welding gun head; 11 is the braking handle; 12 is the variable gap; 13 is the elastic support assembly; 131 is the fixed block; 132 is the annular guide rod; 133 is the buffer spring; 134 is the elastic slider; 135 is the elastic band; 14 is the inner support driving assembly; 141 is the inner support shaft; 142 is the first spline shaft; 143 is the rotating shaft sleeve; 144 is the track disk; 145 is the track sliding table; 15 is the rotating driving assembly; 151 is the rotating shaft; 152 is the second spline shaft; 153 is the transmission belt; 154 is the support shaft sleeve; 155 is the transmission shaft; 156 is the transmission gear; 157 is the transmission gear disk; 16 is the braking shaft; 161 is the rhombic braking end; 17 is the limiting shaft collar; 18 is the braking shaft sleeve; 181 is the first spline tooth sleeve; 182 is the second spline tooth sleeve; 19 is the limiting groove; 20 is the screw shaft; 21 is the rotating seat; 22 is the positioning bolt; 23 is the positioning washer; 24 is the knob; 25 is the clamping screw rod; 26 is the clamping screw sleeve; 27 is the locking rack; 28 is the locking tooth sleeve; 29 is the first convex edge; 30 is the first positioning jack; 31 is the second convex edge; 32 is the second positioning jack; 33 is the parallel locking assembly; 331 is the limiting ring sleeve; 332 is the positioning plug rod; 333 is the threaded sleeve; 334 is the locking thread; 335 is the positioning plug; 336 is the return spring; 34 is the magnetic variable gap; 35 is the magnetic force support assembly; 351 is the bottom support platform; 352 is the first magnetic block; 353 is the top support platform; 354 is the compression spring; 355 is the second magnetic block; 356 is the magnetic ring; 36 is the top support frame; 37 is the rotating electric cylinder; 38 is the rotating arm. Detailed implementation manners

[0043] The following is based on Figures 1 - 23 to describe the steel-lined polytetrafluoroethylene pipe welding device provided by the embodiments of the present invention.

[0044] Embodiment 1. For this embodiment, please refer to Figures 1 - 20 and Figure 23。An embodiment of the present invention provides a steel-lined polytetrafluoroethylene pipe welding device, which includes a welding gun head 10, a rotating shaft seat 8 arranged on one side of the welding gun head 10, a braking cylinder 5 arranged along the axial direction of the rotating shaft seat 8, one end of the braking cylinder 5 is coaxially connected to an inner support cylinder 6, a rotating structure for driving the rotation of the rotating shaft seat 8 is arranged on the braking cylinder 5, inner support plates 7 are arranged on at least two sides of the inner support cylinder 6, an expanding support structure for supporting the expanding displacement of the inner support plates 7 is arranged inside the inner support cylinder 6, and a braking source is arranged on the side of the braking cylinder 5 away from the rotating shaft seat 8. After the inner support cylinder 6 is pushed into the interior of the pipeline to be welded, based on the variable-direction braking of the braking source, the variable-direction displacement of the variable-direction driving structure is driven by its braking handle 11. First, the braking force is variably transmitted to the expanding support structure, and the inner support plates 7 are expanded oppositely along the axis of the inner support cylinder 6 by using the expansion of the expanding support structure, so as to be internally supported and fixed to the inner wall of the pipeline to be welded, replacing the self-support of the device body and coaxial supporting with the pipeline to be welded, and forming a supporting state where the axis of the inner support cylinder 6 is coaxial with the axis of the welding pipeline, so as to achieve the coaxial state of the rotating shaft seat 8 and the axis of the welding pipeline. Then, the braking force is variably transmitted to the rotating structure, the rotating shaft seat 8 is pushed to rotate circumferentially with the welding pipeline as the axis, and then the welding gun head 10 is pushed to rotate circumferentially along the welding pipeline to perform circumferential welding work on the pipeline flange, replacing the traditional way of self-rotating welding of the pipeline, so as to reduce the welding braking load and improve the welding continuity and precise alignment. In addition, to push the inner support cylinder 6 into the interior of the pipeline to be welded, a track table 1 is set as a braking and pushing component, and the inner support cylinder 6 is translated into the welding pipeline, so that the inner support plates 7 on the inner support cylinder 6 are internally supported and fixed to the welding pipeline. The track table 1 is preferably set in a screw propulsion mode, and the screw propulsion length is greater than the tube length of the inner support cylinder 6.

[0045] Please refer to Figures 3 - 4, to achieve the coaxial support of the inner support cylinder 6 and the welded pipe, the expansion support structure includes an inner support drive assembly 14 composed of an inner support shaft 141, a first spline shaft 142, a rotating shaft sleeve 143, an orbital disc 144, and an orbital slide 145. Among them, the inner support shaft 141 is arranged inside the inner support cylinder 6. One end of the inner support shaft 141 is provided with a first spline shaft 142 extending into the brake cylinder 5. Along its axial direction, the inner support shaft 141 is provided with no less than one group of rotating shaft sleeves 143. One side of the rotating shaft sleeve 143 is provided with an orbital disc 144. The spiral guide rail of the orbital disc 144 is provided with orbital slides 145 with the same number as the inner support plates 7. When the brake source changes direction and brakes close to the inner support drive assembly 14, it locks with the first spline shaft 142 and transmits the braking force to the inner support shaft 141. When the inner support shaft 141 rotates, it drives the orbital disc 144 on one side of the rotating shaft sleeve 143 to rotate. By using the braking combination of the orbital disc 144 and the orbital slide 145, the rotational force is converted into an expansion thrust, pushing the inner support plates 7 to expand oppositely with the inner support cylinder 6 as the axis. By using its opposite expansion in the form of a circle center, it finally maintains a coaxial support state with the pipe to be welded, making the inner support cylinder 6 and the pipe to be welded maintain the same axis and fixed. After being fixed, it replaces the device body itself to form a new support state to ensure the coaxial support stability of the inner support cylinder 6 and the pipe to be welded.

[0046] It should be noted that the orbital disc 144 is of a spiral structure. By using the braking combination setting of the spiral structure orbital disc 144 and the orbital slide 145, after the braking force disappears, it can still maintain a stable locked state to maintain the stability of its support components. Please refer to Figures 5 - 6 , to achieve the circumferential rotation welding of the welding gun head 10 along the pipe to be welded when the rotating seat 8 rotates, the rotation structure includes a rotation drive assembly 15 composed of a rotation shaft 151, a second spline shaft 152, a transmission belt 153, a support shaft sleeve 154, a transmission shaft 155, a transmission gear 156, and a transmission gear disc 157. Among them, one end of the rotation shaft 151 is provided with a second spline shaft 152. The other end of the rotation shaft 151 is connected to the transmission shaft 155 through a transmission belt 153. The other end of the transmission shaft 155 is connected to the transmission gear 156. The transmission gear 156 is meshed and connected to a transmission gear disc 157 arranged on one side of the rotating seat 8. When the brake source changes direction and brakes close to the rotation drive assembly 15, it locks with the second spline shaft 152 and transmits the braking force to the rotation shaft 151, driving the rotation shaft 151 to rotate. When the rotation shaft 151 rotates, it drives the transmission shaft 155 to rotate through the transmission belt 153, and then drives the transmission gear 156 to rotate. By using the meshing transmission of the transmission gear 156 and the transmission gear disc 157, it pushes the rotating seat 8 to rotate with the inner support cylinder 6 as the axis, making the welding gun head 10 rotate synchronously along the axis of the welded pipe to perform circumferential rotation welding work on the flange weld of the welded pipe. It should be noted that the rotation shaft 151 is of a hollow shaft structure. By using its hollow setting, the brake shaft 16 in the brake source penetrates the hollow of the rotation shaft 151 for braking transmission.

[0047] See also Figures 7 - 10 In order to realize the expansion and positioning of the inner support plate 7 on the inner support cylinder 6 and the circumferential rotation welding of the welding gun head 10 on the rotating shaft seat 8, the braking source includes a brake shaft 16 that passes through the rotating shaft 151 and is axially arranged opposite to the inner support shaft 141, and a brake handle 11 that is slidably arranged on the brake cylinder 5. The brake handle 11 is used to transmit the braking force of the brake shaft 16 to the rotating shaft 151 or the inner support shaft 141. The brake handle 11 is used as a changing braking component to change the braking force and transmit it to the inner support shaft 141 of the inner support driving assembly 14 or the rotating shaft 151 of the rotating driving assembly 15, so that the inner support driving assembly 14 drives the inner support plate 7 to expand in the opposite direction, and the rotating driving assembly 15 drives the welding gun head 10 on the rotating shaft seat 8 to rotate circumferentially for welding. Specifically:

[0048] One end of the brake shaft 16 is connected to the brake motor 4 arranged on the support seat 3, and the other end of the brake shaft 16 is provided with a prismatic brake end 161. One end of the brake handle 11 is provided with a change-of-direction drive structure, and the change-of-direction drive structure has a diamond-shaped through groove that guides the sliding of the prismatic brake end 161. The change-of-direction drive structure includes a limiting collar 17 arranged at one end of the brake handle 11, and the internal rotation of the limiting collar 17 is connected with a brake sleeve 18, one end of the brake sleeve 18 is provided with a first spline tooth sleeve 181 that is locked and connected to the first spline shaft 142, and the other end of the brake sleeve 18 is provided with a second spline tooth sleeve 182 that is locked and connected to the second spline shaft 152. When the brake handle 11 is moved to the right, the rotation support state of the limiting collar 17 allows the brake sleeve 18 to slide along the prismatic brake end 161 while synchronously maintaining a coaxial rotation state with the prismatic brake end 161, so that when the brake sleeve 18 moves to the right, the first After the spline gear sleeve 181 is locked with the first spline shaft 142, it forms a coaxial rotation state with the prismatic braking end 161, and the braking force is transmitted to the inner support shaft 141, and then the brake motor 4 works to drive the combined transmission of the brake shaft 16 and the prismatic braking end 161 to form a driving source, driving the combined rotation of the brake sleeve 18 and the inner support shaft 141, so that the inner support driving assembly 14 drives the inner support plate 7 to expand and support to the welding pipe in the opposite direction, so as to realize the coaxial support of the inner support cylinder 6 and the welding pipe. After the inner support cylinder 6 and the welding pipe are coaxially supported and fixed, the brake handle 11 is bent to the left through the above-mentioned transmission method, so that when the brake sleeve 18 moves to the left, the second spline gear sleeve 182 at the other end thereof is locked with the second spline shaft 152, driving the combined rotation of the brake sleeve 18 and the rotating shaft 151, so that the rotating drive assembly 15 drives the welding gun head 10 on the rotating shaft seat 8 to rotate circumferentially along the welding pipe, so as to realize the circumferential welding of the pipe flange.

[0049] See also Figures 11 - 14In order to achieve accurate alignment between the welding gun head 10 and the weld of the pipeline flange, a rotating frame 9 is provided between the rotating shaft seat 8 and the welding gun head 10. The rotating frame 9 is provided with a calibration structure for driving the angle displacement of the welding gun head 10. The height and angle of the nozzle of the welding gun head 10 are pre-adjusted and calibrated so that the welding nozzle is aligned with the weld of the pipeline flange. Specifically:

[0050] The positioning structure includes a screw shaft 20, which is slidably arranged along the support direction of the rotating frame 9. The side frame of the rotating frame 9 is arranged with at least one group of limiting grooves 19. The middle ring of the screw shaft 20 is provided with a rotating seat 21 for supporting the welding gun head 10. A positioning bolt 22 is threadedly screwed on one end of the screw shaft 20. A positioning washer 23 opposite to the limiting groove 19 is staggered on the screw shaft 20 and is provided. By using the one-to-one correspondence between the positioning washer 23 and the limiting groove 19, the screw shaft 20 is slid up and down along the rotating frame 9 to adjust the position. After adjusting the position, by rotating the positioning bolt 22, a tightening pressure is applied between the positioning bolt 22 and the screw shaft 20 to the positioning washer 23 and the rotating frame 9, and the screw shaft 20 is tightened and fixed at a specified height of the rotating frame 9, and the height of the welding gun head 10 is adjusted and positioned.

[0051] The calibration structure also includes a locking gear sleeve 28 arranged on the rotating seat 21, a clamping screw rod 25 arranged inside the screw shaft 20, a knob 24 being provided at one end of the clamping screw rod 25, and a positive and negative thread teeth bounded by a center line being provided on the clamping screw rod 25, two groups of clamping screw sleeves 26 being provided on the positive and negative thread teeth, and locking racks 27 for unlocking and locking with the locking gear sleeve 28 being provided in opposite forms on the two groups of clamping screw sleeves 26. By turning the knob 24, the clamping screw rod 25 is driven to rotate, and the positive and negative thread teeth thereof are used to push the two opposite groups of clamping screw sleeves 26 to slide in opposite directions, and the locking rack 27 is moved away from the locking gear sleeve 28 in opposite directions, and the locked state is released, so that the rotating seat 21 can be rotated along the screw shaft 20 in the up and down directions, and the welding inclination angle of the welding gun head 10 is adjusted and calibrated, and after the adjustment and calibration, the locking rack 27 and the locking gear sleeve 28 are re-locked.

[0052] See also Figures 15 - 17 In order to realize the variable displacement of the inner support cylinder 6 along the welding pipe, the brake cylinder 5 is fixed on the support seat 3, and a support shell 2 is provided in the ring on the support seat 3. A variable cavity is spaced between the support shell 2 and the support seat 3. An elastic support structure is provided in the support shell 2 to enable the support seat 3 to be variable displaced along the variable cavity, so that the support seat 3 is elastically variable displaced and reset along the variable cavity. The elastic support structure supports the support seat 3 elastically and the variable cavity is opened between the support seat 3 and the support shell 2, so that the support seat 3 has the characteristic of elastic variable displacement along the support shell 2, so that the inner support cylinder 6 coaxial with the brake cylinder 5 can be more flexibly inserted into the welding pipe and flexibly coaxially supported with the welding pipe. Specifically:

[0053] The elastic support structure includes an elastic support assembly 13 disposed within the support housing 2 and connected to the support base 3, as well as a variable gap 12 opened along the variable cavity. Among them, the elastic support assembly 13 includes an annular guide rod 132 circumferentially arranged along the support housing 2. There are no less than one set of fixing blocks 131 on the annular guide rod 132. Elastic sliders 134 sleeved on the annular guide rod 132 are provided on both sides of the fixing block 131. A buffer spring 133 sleeved on the annular guide rod 132 and abutting on the fixing block 131 is provided on one side of the elastic slider 134. And an elastic band 135 connected to the support base 3 is provided on the other side of the elastic slider 134. Through the elastic telescopic combination of the elastic slider 134 and the buffer spring 133 along the annular guide rod 132, and with the elastic connection of the elastic band 135 on the elastic slider 134 to the support base 3, the support base 3 has the characteristic of variable displacement in any direction along the variable gap 12. Then, by using its elastic support characteristic, it has a larger variable displacement space, so that the inner support cylinder 6 can be adapted to the deep penetration and inner support of large-diameter pipelines.

[0054] The magnetic support structure includes a magnetic support assembly 35 disposed within the support housing 2 and connected to the support base 3, as well as a magnetic variable gap 34 opened along the variable cavity. Among them, the magnetic support assembly 35 includes a magnetic ring 356 sleeved around the support base 3, a bottom support platform 351 provided on at least one side of the lower half of the support housing 2. A first magnetic block 352 that magnetically repels the magnetic ring 356 is provided on the bottom support platform 351. A top support platform 353 is provided on at least one side of the upper half of the support housing 2. A second magnetic block 355 that magnetically attracts and fixes to the magnetic ring 356 is provided on the top support platform 353. There are no less than one set of compression springs 354 between the top support platform 353 and the second magnetic block 355. Through the magnetic repulsion between the first magnetic block 352 and the magnetic ring 356, the support base 3 is affected by the magnetic force and while maintaining variable displacement, it does not touch the bottom of the support housing 2 and collide. And through the magnetic attraction and fixation between the second magnetic block 355 and the magnetic ring 356, the support base 3 is affected by the magnetic force and while maintaining magnetic positioning support, it also has the characteristic of variable displacement. Then, by using its magnetic support characteristic, it has a micro variable displacement space, so that the inner support cylinder 6 can be adapted to the precise deep penetration and inner support of small-diameter pipelines.

[0055] In order to realize the convenient disassembly and assembly of the brake cylinder 5 and the inner support cylinder 6, one end of the brake cylinder 5 is provided with at least one group of first convex edges 29, and a first positioning hole 30 is opened on the first convex edge 29, and one end of the inner support cylinder 6 is provided with at least one group of second convex edges 31, and a second positioning hole 32 is opened on the second convex edge 31. The first convex edge 29 and the second convex edge 31 are staggered and overlapped with each other, and the mating end ring sleeves of the first convex edge 29 and the second convex edge 31 are provided with parallel locking components 33 for integrally limiting and fixing them. The staggered mating of the first convex edge 29 on the brake cylinder 5 and the second convex edge 31 on the inner support cylinder 6 are used to maintain an integral coaxial state between the brake cylinder 5 and the inner support cylinder 6, and then the parallel locking component 33 is slid into the staggered ends of the two groups of convex edges to realize the ring sleeve limitation, and the parallel locking component 33 and the positioning hole on the convex edge are used to realize self-locking fixation, so that the brake cylinder 5 and the inner support cylinder 6 are integrated. When the locking cam 335 is in the unlocking state, the locking cam 336 is pressed against the locking cam 338 to lock the locking cam 339. When the locking cam 339 is in the unlocking state, the locking cam 339 is pressed against the locking cam 338. Furthermore, the positioning rod 332 is provided with a locking thread 334 threadedly connected to the threaded sleeve 333. When the brake cylinder 5 and the inner support cylinder 6 are subsequently disassembled and maintained, the positioning rod 332 is lifted up in turn and the positioning rod 332 is rotated so that the locking thread 334 is screwed into the threaded sleeve 333, overcoming the elastic compression force of the return spring 336, and the positioning rod 332 is pulled out and positioned. After all the positioning rods 332 are pulled out and positioned, the limiting ring sleeve 331 is slid left and right to stagger the mating convex edges of the brake cylinder 5 and the inner support cylinder 6, so that convenient disassembly and assembly can be achieved.

[0056] For example 2, please refer to Figures 21 - 22, Different from the first embodiment, by providing a top support frame 36 on the original rotating frame 9 as the support carrier of the rotating electric cylinder 37, and providing a rotating arm 38 for supporting another group of rotating frames 9, alignment structures, and welding torches 10 at the rotating end of the rotating electric cylinder 37, the rotating and swinging of the rotating electric cylinder 37 is utilized to push another group of welding torches 10 to rotate and swing, forming an opposing welding method with the original welding torches 10, moving oppositely to both sides of the pipeline flange, and realizing the synchronous welding work of the welds on both sides of the pipeline flange, so as to adapt to the double-sided welding work of large-sized and relatively thick flanges, improve the welding efficiency, enhance the welding quality, and have flexible usage characteristics, capable of single-gun welding as well as double-gun synchronous welding.

Claims

1. A steel-lined polytetrafluoroethylene pipe welding device, characterized in that: include: Welding gun tip (10); A rotating shaft seat (8), wherein the rotating shaft seat (8) is located on one side of the welding gun head (10); A rotating frame (9), the rotating frame (9) being located between the rotating shaft seat (8) and the welding gun head (10) and being used for transmitting the rotating force of the rotating shaft seat (8) to the welding gun head (10); A brake cylinder (5), wherein the brake cylinder (5) is axially arranged along the rotating shaft seat (8), one end of the brake cylinder (5) is coaxially connected to the inner support cylinder (6), and a rotating structure for driving the rotating shaft seat (8) to rotate is provided on the brake cylinder (5), so that the rotating shaft seat (8) is rotated along the axis of the inner support cylinder (6); An inner support plate (7), the inner support plate (7) being located on at least two sides of the inner support tube (6), and an expansion support structure for supporting the inner support plate (7) to expand and move is provided in the inner support tube (6), so that the inner support tube (6) and the welding pipe are fixed to the same axis; A braking source, the braking source being located on a side of the brake cylinder (5) away from the rotating shaft seat (8), the braking source being used to drive the inner support plate (7) to expand in opposite directions and to drive the rotating shaft seat (8) to rotate, so that the rotating shaft seat (8) in a rotating state drives the welding gun head (10) to rotate along the axis of the inner support cylinder (6); The brake source comprises a brake shaft (16) that passes through the rotating shaft (151) and is axially arranged opposite to the inner support shaft (141), and a brake handle (11) that is slidably arranged on the brake cylinder (5), and the brake handle (11) is used to transmit the braking force of the brake shaft (16) to the rotating shaft (151) or the inner support shaft (141); Wherein, one end of the brake shaft (16) is provided with a prismatic brake end (161); One end of the brake handle (11) is provided with a direction-changing drive structure, which has a rhombus-shaped through groove that guides the sliding movement of the prism-shaped brake end (161), so that when the direction-changing drive structure changes direction and slides, it maintains a locked state with the first spline shaft (142) or the second spline shaft (152), thereby driving the inner support shaft (141) or the rotating shaft (151) to rotate; The other end of the brake cylinder (5) has a flange support end, which is fixed on a support seat (3). A support shell (2) is provided in a ring on the support seat (3). A variable cavity is provided between the support shell (2) and the support seat (3), so that the inner support cylinder (6) can be displaced in a variable manner when expanding the welding pipe, and is coaxial with the axis of the welding pipe. Wherein, an elastic support structure is provided in the support shell (2) to enable the support seat (3) to be variable-displaced along the variable cavity, so that the support seat (3) is elastically variable-displaced and reset along the variable cavity.

2. A steel-lined polytetrafluoroethylene pipe welding device according to claim 1, characterized in that: The rotating structure comprises a transmission toothed disc (157), wherein the transmission toothed disc (157) is arranged on one side of the rotating shaft seat (8), and a transmission gear (156) is meshedly connected inside the transmission toothed disc (157); Also includes: A rotating shaft (151), the rotating shaft (151) being arranged in the brake cylinder (5) away from the rotating shaft seat (8), and a second spline shaft (152) being arranged at one end of the rotating shaft (151); A transmission shaft (155) is arranged on the brake cylinder (5), and the transmission shaft (155) is provided with a support sleeve (154) fixedly connected to the brake cylinder (5) along its axial direction. One end of the transmission shaft (155) is connected to a transmission gear (156), and the other end of the transmission shaft (155) is connected to the rotating shaft (151) through a transmission belt (153), so that the rotational braking force of the second spline shaft (152) is transmitted to the rotating shaft seat (8), driving the welding gun head (10) to rotate along the axis of the inner support cylinder (6).

3. A steel-lined polytetrafluoroethylene pipe welding device according to claim 1, characterized in that: The expansion support structure comprises an inner support shaft (141), the inner support shaft (141) is arranged inside the inner support cylinder (6), and one end of the inner support shaft (141) is provided with a first spline shaft (142) extending into the brake cylinder (5); Also includes: A rotating sleeve (143) is provided in at least one group along the axial direction of the inner support shaft (141); a track plate (144) is provided on one side of the rotating sleeve (143); the track plate (144) is a spiral structure; the spiral guide rail of the track plate (144) is provided with track slides (145) which are the same in number as the inner support plate (7), so that the track plate (144) in a rotating state converts the spiral thrust into an expansion thrust which is transmitted to the track slide (145), thereby pushing the inner support plate (7) to expand in opposite directions with the inner support tube (6) as the axis.

4. A steel-lined polytetrafluoroethylene pipe welding device according to claim 3, characterized in that: The direction-changing drive structure comprises a limit collar (17) arranged at one end of a brake handle (11), the limit collar (17) being internally rotatably connected to a brake sleeve (18), one end of the brake sleeve (18) being provided with a first spline tooth sleeve (181) lockably connected to a first spline shaft (142), and the other end of the brake sleeve (18) being provided with a second spline tooth sleeve (182) lockably connected to a second spline shaft (152).

5. A steel-lined polytetrafluoroethylene pipe welding device according to claim 4, characterized in that: The elastic support structure comprises an elastic support component (13) disposed in the support shell (2) and connected to the support seat (3), and a variable gap (12) opened along the variable cavity, so that the support seat (3) is elastically variable displaced along the variable gap (12) through the elastic support component (13), wherein; The elastic support assembly (13) comprises: an annular guide rod (132), the annular guide rod (132) being arranged along the circumference of the support shell (2), and the annular guide rod (132) being provided with at least one set of fixing blocks (131), so that the annular guide rod (132) is fixed to the support shell (2) through the fixing blocks (131); Elastic sliders (134), the elastic sliders (134) are sleeved on the annular guide rods (132) in pairs and face each other on both sides of the fixed block (131); one side of the elastic sliders (134) is provided with a buffer spring (133) sleeved on the annular guide rod (132) and seated on the fixed block (131); and the other side of the elastic sliders (134) is provided with an elastic band (135) connected to the support seat (3), so that the support seat (3) has elastic variable displacement and elastic support along the variable gap (12).

6. A steel-lined polytetrafluoroethylene pipe welding device according to claim 4, characterized in that: The elastic support structure comprises a magnetic support component (35) disposed in the support shell (2) and connected to the support seat (3), and a magnetic variable gap (34) opened along the variable cavity, so that the support seat (3) is magnetically variable displaced along the magnetic variable gap (34) through the magnetic support component (35), wherein; The magnetic support assembly (35) comprises: A magnetic ring (356), wherein the magnetic ring (356) is sleeved on the support seat (3); A bottom support platform (351), the bottom support platform (351) being located on at least one side of the lower half of the support shell (2), and a first magnetic block (352) that is magnetically repelled from the magnetic ring (356) is provided on the bottom support platform (351), so that the support seat (3) does not collide with the bottom of the support shell (2) under the magnetic repulsion of the first magnetic block (352) and the magnetic ring (356); A top support platform (353), the top support platform (353) is located on at least one side of the upper half of the support shell (2), a second magnetic block (355) is provided on the top support platform (353) and is magnetically fixed to the magnetic ring (356), and at least one group of compression springs (354) are provided between the top support platform (353) and the second magnetic block (355), so that the support seat (3) has magnetic variable displacement and magnetic support along the magnetic variable gap (34) under the magnetic attraction force of the second magnetic block (355) and the magnetic ring (356).

7. A steel-lined polytetrafluoroethylene pipe welding device according to claim 1, characterized in that: The rotating frame (9) is provided with a positioning structure for driving the welding gun head (10) to angularly displace, so that the nozzle angle of the welding gun head (10) can be adjusted and positioned, wherein: The school structure includes: A screw shaft (20), the screw shaft (20) being slidably arranged along the support direction of the rotating frame (9), a rotating seat (21) supporting the welding gun head (10) being provided in a ring sleeve in the middle of the screw shaft (20), one end of the screw shaft (20) having a threaded end, a positioning bolt (22) being threadedly screwed on the threaded end, so that the positioning bolt (22) applies a thread tightening pressure to the rotating frame (9) along the axial direction of the screw shaft (20); Limiting grooves (19), the limiting grooves (19) are provided in at least one group, the limiting grooves (19) are arranged along the side frame of the rotating frame (9), and the screw shaft (20) is provided with a positioning washer (23) opposite to the limiting groove (19) and staggered with the positioning bolt (22), so that the positioning bolt (22) is pressed tightly against the positioning washer (23) into the limiting groove (19); The school structure also includes: A locking gear sleeve (28), wherein the locking gear sleeve (28) is arranged on the rotating seat (21); A clamping screw rod (25) is arranged inside the screw shaft (20), a knob (24) is provided at one end of the clamping screw rod (25), positive and negative thread teeth are provided on the clamping screw rod (25) with the center line as the boundary, two groups of clamping screw sleeves (26) are sleeved on the positive and negative thread teeth, and locking racks (27) are provided on the two groups of clamping screw sleeves (26) in an opposing manner and are unlocked and locked with the locking tooth sleeve (28).

8. A steel-lined polytetrafluoroethylene pipe welding device according to claim 7, characterized in that: One end of the brake cylinder (5) is provided with at least one set of first convex edges (29), and the first convex edges (29) are provided with first positioning holes (30); One end of the inner support tube (6) is provided with at least one set of second protrusions (31), and the second protrusions (31) are provided with second positioning holes (32); The first convex edge (29) and the second convex edge (31) are staggered and overlapped with each other, and the mating end ring sleeves of the first convex edge (29) and the second convex edge (31) are provided with a parallel locking assembly (33) for integrally limiting and fixing the first convex edge (29) and the second convex edge (31), wherein: The parallel locking assembly (33) comprises: A limiting ring sleeve (331), the limiting ring sleeve (331) is slidably arranged along the axial direction of the brake cylinder (5) and the inner support cylinder (6), and the limiting ring sleeve (331) is provided with at least two groups of threaded sleeves (333) along its circumference; A positioning plug rod (332) is provided along the threaded sleeve (333) for insertion and penetration. A positioning plug (335) is provided on the positioning plug rod (332) and is inserted and opposed to the first positioning socket (30) and the second positioning socket (32). A return spring (336) is sleeved on the positioning plug rod (332) for providing pressure to the positioning plug (335), so that the positioning plug (335) is inserted into the first positioning socket (30) and the second positioning socket (32) to achieve coaxial assembly of the brake cylinder (5) and the inner support cylinder (6). A locking thread (334) is provided on the positioning plug rod (332) and is threadedly screwed with the threaded sleeve (333) to enable the positioning plug (335) to be away from the first positioning socket (30) and the second positioning socket (32) to achieve separate disassembly and assembly of the brake cylinder (5) and the inner support cylinder (6).

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