Double-gun girth welding equipment for glass-lined pipe fitting

Abstract

The invention discloses double-gun girth welding equipment for glass lining pipe fittings, and relates to the technical field of intelligent welding equipment.The welding equipment comprises a base, an assembly table, a shading door, a correcting mechanism, a clamping mechanism and a double-position welding gun, the correcting mechanism comprises an assembly frame, and the clamping mechanism comprises an electric push table and an assembly frame; a side sliding groove and a top sliding groove are formed in the assembling table, one assembling frame is fixedly connected with the assembling table, the other assembling frame is slidably connected with the top sliding groove, the shading door is slidably connected with the side sliding groove, the assembling frame is fixedly connected with the assembling frames, the double-position welding gun comprises a bottom frame, and the assembling table is fixedly connected with the base and the bottom frame. Ring welding of the two ends of the pipe fitting and the flange plate is completed synchronously in a highly intelligent and automatic mode, meanwhile, thermal deformation of the pipe fitting is accurately recognized, the bending state is actively adapted, compensation and correction are conducted, and the quality and efficiency of pipe fitting ring welding are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent welding equipment, in particular to a double-gun circumferential seam welding device for glass-lined pipe fittings. Background Art

[0002] Circumferential welding of steel pipes, as the core process for pipe section connection, pipe fittings manufacturing and defect repair in pipeline engineering, refers to the welding operation performed along the circumference of the steel pipe. Its key technologies involve precise deformation control, reliable quality assurance, reasonable material matching and efficient automation application. This technology is widely used in many fields such as petroleum and natural gas, chemical industry, and electric power, and its welding quality has a direct and crucial impact on the safety and service life of the pipeline.

[0003] During the circumferential welding process, due to the rapid heating and cooling of the local high-temperature heat source, the steel pipe will produce uneven thermal expansion and contraction, thereby inducing residual stress and thermal deformation. Such deformation is very likely to have a negative impact on the geometric accuracy, assembly performance and structural strength of the pipeline, especially in the field of precision manufacturing with extremely high precision requirements, the importance of this effect is even more prominent. Summary of the invention

[0004] The object of the present invention is to provide a double-gun circumferential seam welding device for glass-lined pipe fittings to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-gun circumferential seam welding device for glass-lined pipe fittings comprises a base, an assembly table, a light-shielding door, a correction mechanism, a clamping mechanism and a double-position welding gun, the correction mechanism comprises an assembly frame, the clamping mechanism comprises an electric push table and an assembly frame, the assembly table is provided with side slide grooves and a top slide groove, the assembly frame is provided with two groups, one group of assembly frames is fixedly connected to the assembly table, and the other group of assembly frames is slidably connected to the top slide groove, the light-shielding door is slidably connected to the side slide groove, the assembly frame is fixedly connected to the assembly frame, the double-position welding gun comprises a base frame, and the assembly table is fixedly connected to the base and the base frame.

[0006] The present invention discloses a circumferential welding device for simultaneously welding two groups of flanges to the two ends of a pipe fitting. An electric push table is used to push one group of assembly frames to move toward another group of fixed assembly frames. A clamping mechanism clamps and assembles the two groups of flanges at the two ends of the pipe fitting. A double-position welding gun is moved to the welding seams between the two groups of flanges and the pipe fitting. The clamping mechanism drives the flanges and the pipe fitting to rotate around their axes. The double-position welding gun completes the welding seam at the connection between the flanges and the pipe fitting. When the circumferential welding of the pipe fitting flange is performed, the clamping mechanism detects the uneven thermal expansion and contraction of the steel pipe due to the rapid heating and cooling of the local high-temperature heat source, resulting in residual stress and thermal deformation, and actively compensates and corrects the thermal deformation of the pipe fitting.

[0007] Furthermore, the correction mechanism also includes a servo cylinder, an expansion mechanism, a distance adjustment mechanism and an electromagnetic mechanism. The expansion mechanism includes a chassis and an electric control cylinder. The distance adjustment mechanism includes a push frame, a drive motor and a laser transceiver. The electromagnetic mechanism includes a side frame. The servo cylinder and the side frame are fixedly connected to the assembly frame. The output end of the servo cylinder is fixedly connected to the push frame. The push frame is slidably connected to the assembly frame. The chassis is fixedly connected to the output end of the drive motor. The servo cylinder and the electric control cylinder are connected to the laser transceiver through electrical signals.

[0008] The laser is transmitted and received by the laser transceiver. The laser is directly irradiated along the inner diameter of the pipe wall in the pipe fitting. When the pipe fitting is rapidly heated and cooled by the local high-temperature heat source, uneven thermal expansion and contraction will occur, resulting in residual stress and thermal deformation. The laser will be refracted and deflected at the bending point of the inner diameter of the pipe wall. The two sets of laser transceivers arranged at both ends of the pipe fitting can accurately determine the range of the bending point of the inner diameter of the pipe wall. The output end of the servo cylinder pushes the push frame to move the expansion mechanism to the deformation position of the inner wall of the pipe diameter to compensate for the rounding. When the flange and the pipe fitting are self-rotating and ring-welded, the electromagnetic mechanism fixes the flange and the pipe fitting to prevent the flange and the pipe fitting from deflecting and slipping, which may cause welding failure.

[0009] Furthermore, the diameter expansion mechanism also includes a sliding rod, a top plate, a main shaft, a rod frame, a sleeve, a first pulley plate and a second pulley plate. The sliding rod and the main shaft are fixedly connected to the chassis, the top plate is fixedly connected to the main shaft and the electric control cylinder, the rod frame is fixedly connected to the output end of the electric control cylinder and the first pulley plate, the sleeve is rotatably connected to the main shaft, the sleeve is provided with an external thread, the first pulley plate is provided with a first threaded hole, the second pulley plate is provided with a second threaded hole and a first through hole, the first through hole is slidably connected to the sliding rod, the first threaded hole and the second threaded hole are both threadedly connected to the external thread, and the first threaded hole and the second threaded hole have opposite thread rotation directions.

[0010] Due to the rapid heating and cooling of the local high-temperature heat source, the pipe fittings produce uneven thermal expansion and contraction, resulting in residual stress and thermal deformation. In most cases, the circumferential contraction of the annular weld area causes the pipe diameter to decrease. In a small number of cases, the uneven contraction of the annular seam causes the circular cross-section to become elliptical, affecting the pipe docking and sealing performance. The drive motor outputs a fixed-axis torque to the chassis, and the chassis slides and assembles the second pulley plate through the sliding rod. The first pulley plate is fixedly assembled through the top spindle, the top plate, the electric control cylinder, and the rod frame, driving the first pulley plate and the second pulley plate to rotate around the spindle axis. The first pulley plate and the second pulley plate are equipped with copper wheels. When the internal diameter of the pipe fitting is rotated to expand and correct the roundness, the high-temperature area of ​​the pipe fitting is The heat dissipation in the domain is accelerated. At the same time, when the laser transceiver recognizes that the bending curvature is large and the pipe is bent as a whole, the effect of simple internal diameter expansion and rounding correction is not good. The output end of the electric control cylinder drives the first pulley to move through the rod frame. The displacement of the first pulley is simultaneously assembled through the first threaded hole, the second threaded hole and the external thread. The sleeve rotates around the main shaft axis to transmit torque to the second pulley. The first threaded hole and the second threaded hole have opposite thread rotation directions, and the displacement directions of the first pulley and the second pulley are opposite. Through the reciprocating displacement of the output end of the electric control cylinder, the first pulley and the second pulley are synchronously displaced relative or toward each other to straighten the greatly bent area of ​​the inner diameter of the pipe when the pipe rotates to expand the diameter and round it.

[0011] Furthermore, the distance adjustment mechanism also includes a vertical circular plate, which is fixedly connected to the push frame, the drive motor, and the laser transceiver. A second through hole is provided on the vertical circular plate, and the drive motor is rotatably connected to the second through hole.

[0012] Two sets of laser transceivers arranged at both ends of the pipe can accurately determine the range of the bending point of the inner diameter of the pipe wall. The output end of the servo cylinder pushes the push frame to move the expansion mechanism to the deformation position of the inner wall of the pipe diameter. The drive motor outputs a fixed-axis torque to the chassis, driving the expansion mechanism to compensate and correct the deformation position of the inner wall of the pipe diameter.

[0013] Furthermore, the electromagnetic mechanism also includes a ring rail frame, an electromagnetic ring platform and an electromagnetic suction block. The ring rail frame is fixedly connected to the side frame, the electromagnetic ring platform is rotatably connected to the ring rail frame, the electromagnetic suction block is fixedly connected to the electromagnetic ring platform, and the electromagnetic suction blocks are provided in several groups, and the several groups of electromagnetic suction blocks are evenly distributed along the circumference of the electromagnetic ring platform.

[0014] Before welding, the electric push table pushes a group of assembly frames to move as a whole, and several groups of electromagnetic suction blocks evenly distributed on the circumference of the electromagnetic ring table are attached to the gap between the flange and the steel pipe. The electromagnetic ring table is energized to make the electromagnetic suction blocks magnetically adsorb the flange and the steel pipe. When the flange and the steel pipe are self-rotating for ring welding, the electromagnetic ring table rotates on the ring rail frame to prevent the flange and the pipe from deflecting and slipping, which will cause welding failure.

[0015] Furthermore, the clamping mechanism also includes a servo motor, a pulley and a claw disk mechanism. The output end of the electric push table is fixedly connected to a group of assembly frames, the servo motor is fixedly connected to the assembly frame, the output end of the servo motor is fixedly connected to the pulley, and the assembly frame is provided with a flange hole. The claw disk mechanism also includes a rotating drum, the rotating drum is provided with a belt groove, the pulley and the belt groove are connected by belt transmission, and the rotating drum is rotatably connected to the flange hole.

[0016] Before welding, the two sets of flanges are clamped in two sets of claw disk mechanisms respectively. The output end of the electric push table pushes one set of assembly frames to move toward the other set of assembly frames. The pipe fittings are assembled between the two sets of flanges. The servo motor outputs a fixed-axis torque to the pulley, and the torque is transmitted to the rotating drum through the belt transmission between the pulley and the belt groove. The rotating drum rotates in the flange hole, and the claw disk mechanism drives the flange and the pipe fitting to rotate around their axis.

[0017] Furthermore, the claw disk mechanism also includes a three-jaw chuck and a sliding claw. The three-jaw chuck is fixedly connected to the rotating drum. The three-jaw chuck is provided with a sliding groove. There are three groups of sliding grooves and sliding claws. The three groups of sliding grooves and sliding claws are evenly distributed along the circumference of the rotating drum. The sliding claw is slidably connected to the sliding groove. The sliding claw is provided with a right-angle groove, and the right-angle groove is arranged on the sliding claw away from the rotating drum.

[0018] The two groups of flanges are clamped in two groups of claw-disk mechanisms respectively, and are synchronously displaced toward the center of the three-jaw chuck through three groups of sliding claws evenly distributed on the circumference. The flanges are clamped by the right-angle grooves on the sliding claws to complete the self-positioning clamping of the flanges and ensure that the centers of the flanges at both ends are coaxial.

[0019] Furthermore, the double-position welding gun also includes a three-axis displacement module and an elbow welding gun. The three-axis displacement module and the elbow welding gun are each provided with two groups. The two groups of three-axis displacement modules and elbow welding guns are respectively arranged at both ends of the base frame. The three-axis displacement module is fixedly connected to the base frame and the elbow welding gun.

[0020] During welding, two sets of three-axis displacement modules arranged at both ends of the chassis drive two sets of elbow welding guns, which are displaced in the three-axis space to the connection between the two sets of flanges and the annular seams of steel pipes and fixed there. The claw plate mechanism drives the flanges and pipe fittings to rotate around their axes, and the elbow welding guns complete the annular seam welding of the flanges and pipe fittings.

[0021] Compared with the prior art, the invention has the following beneficial effects: the invention designs a correction mechanism, the laser transceiver transmits and receives laser, the laser is directly irradiated along the inner diameter of the pipe wall in the pipe fitting, when the pipe fitting is thermally deformed, the laser accurately determines the range of the bending point of the inner diameter of the pipe wall, and identifies whether the circumferential contraction of the annular weld area causes the pipe diameter to decrease, or the uneven contraction of the annular seam causes the circular cross-section to become an elliptical shape, affecting the pipe docking and sealing performance, the output end of the servo cylinder pushes the push frame, the diameter expansion mechanism moves to the deformation position of the inner wall of the pipe diameter to compensate for the rounding, the drive motor outputs a fixed-axis torque, drives the first pulley disc and the second pulley disc to rotate around the main shaft axis, the first pulley disc and the second pulley disc are equipped with copper wheels, when the internal rotation of the pipe fitting is used for diameter expansion and rounding correction, the heat dissipation of the high-temperature area of ​​the pipe fitting is accelerated, when the laser transceiver identifies that the bending curvature is large and the pipe fitting is bent as a whole, the simple internal diameter expansion and rounding correction effect is poor, and the electric control cylinder The output end drives the first pulley to move, and through the threaded assembly between the first threaded hole, the second threaded hole and the external thread, the sleeve rotates around the main shaft axis, the first threaded hole and the second threaded hole have opposite thread rotation directions, and the output end of the electronically controlled cylinder reciprocates and moves, and the first pulley and the second pulley synchronously move relative to or toward each other to straighten the greatly bent area of ​​the inner diameter of the pipe fitting when the pipe fitting rotates to expand the diameter and correct the roundness, and actively compensates and corrects the thermal deformation of the pipe fitting. The electromagnetic suction block magnetically absorbs the flange and the steel pipe to avoid deflection and slippage of the flange and the pipe fitting, which causes welding failure; the present invention designs a double-position welding gun, which completes synchronous ring welding of the connection between the two ends of the steel pipe and the flange when the flange and the steel pipe rotate; the present invention is highly intelligent, and automatically and synchronously completes the ring welding of the two ends of the pipe fitting and the flange, while accurately identifying the thermal deformation of the pipe fitting, actively adapting to the bending state, compensating and correcting, thereby greatly improving the quality and efficiency of the ring welding of the pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the correction mechanism of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the distance adjustment mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the diameter expansion mechanism of the present invention;

[0026] Figure 5 for Figure 4 A schematic diagram of a local A enlargement;

[0027] Figure 6 It is a schematic diagram of the structure of the electromagnetic mechanism of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the clamping mechanism of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the double-position welding gun of the present invention.

[0030] In the figure: 1, base; 2, assembly table; 21, side slide; 22, top slide; 3, light shielding door; 4, correction mechanism; 41, assembly frame; 42, servo cylinder; 43, diameter expansion mechanism; 431, chassis; 432, slide rod; 433, top plate; 434, electric control cylinder; 435, spindle; 436, rod frame; 437, sleeve; 4371, external thread; 438, first pulley plate; 4381, first threaded hole; 439, second pulley plate; 4391, second threaded hole; 4392, first through hole; 44, distance adjustment mechanism; 441, push frame; 442, vertical circular plate; 442 1. Second through hole; 443. Drive motor; 444. Laser transceiver; 45. Electromagnetic mechanism; 451. Side frame; 452. Ring rail frame; 453. Electromagnetic ring table; 454. Electromagnetic suction block; 5. Clamping mechanism; 51. Electric push table; 52. Assembly frame; 521. Flange hole; 53. Servo motor; 54. Pulley; 55. Claw disk mechanism; 551. Rotating drum; 5511. Belt groove; 552. Three-claw chuck; 5521. Sliding groove; 553. Sliding claw; 5531. Right-angle groove; 6. Double-position welding gun; 61. Base frame; 62. Three-axis displacement module; 63. Elbow welding gun. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1 , Figure 2 As shown, the present invention provides a technical solution of a double-gun circumferential seam welding device for glass-lined pipe fittings, including a base 1, an assembly table 2, a light-shielding door 3, a correction mechanism 4, a clamping mechanism 5 and a double-position welding gun 6, wherein the correction mechanism 4 includes an assembly frame 41, the clamping mechanism 5 includes an electric push table 51 and an assembly frame 52, the assembly table 2 is provided with a side slide groove 21 and a top slide groove 22, the assembly frame 52 is provided with two groups, one group of assembly frames 52 is fixedly connected to the assembly table 2, and one group of assembly frames 52 is slidably connected to the top slide groove 22, the light-shielding door 3 is slidably connected to the side slide groove 21, the assembly frame 41 is fixedly connected to the assembly frame 52, the double-position welding gun 6 includes a base frame 61, and the assembly table 2 is fixedly connected to the base 1 and the base frame 61.

[0033] The present invention is a circumferential welding device for simultaneously welding two groups of flanges to both ends of a pipe fitting. An electric pusher 51 is used to push one group of assembly frames 52 to move toward another group of fixed assembly frames 52. A clamping mechanism 5 clamps and assembles the two groups of flanges at both ends of the pipe fitting. A double-position welding gun 6 is moved to the welds between the two groups of flanges and the pipe fitting. The clamping mechanism 5 drives the flanges and the pipe fitting to rotate around their axes. The double-position welding gun 6 completes the weld at the connection between the flanges and the pipe fitting. When the circumferential welding of the pipe fitting flange is performed, the clamping mechanism 5 detects the uneven thermal expansion and contraction of the steel pipe due to the rapid heating and cooling of the local high-temperature heat source, resulting in residual stress and thermal deformation, and actively compensates and corrects the thermal deformation of the pipe fitting.

[0034] like Figure 2 , Figure 3 , Figure 4 , Figure 6 As shown, the correction mechanism 4 also includes a servo cylinder 42, an expansion mechanism 43, a distance adjustment mechanism 44 and an electromagnetic mechanism 45. The expansion mechanism 43 includes a chassis 431 and an electric cylinder 434. The distance adjustment mechanism 44 includes a push frame 441, a drive motor 443 and a laser transceiver 444. The electromagnetic mechanism 45 includes a side frame 451. The servo cylinder 42 and the side frame 451 are both fixedly connected to the assembly frame 41. The output end of the servo cylinder 42 is fixedly connected to the push frame 441. The push frame 441 is slidably connected to the assembly frame 41. The chassis 431 is fixedly connected to the output end of the drive motor 443. The servo cylinder 42 and the electric cylinder 434 are both connected to the laser transceiver 444 through electrical signals.

[0035] The laser is emitted and received by the laser transceiver 444, and the laser is directly irradiated along the inner diameter of the pipe wall in the pipe fitting. When the pipe fitting is rapidly heated and cooled by the local high-temperature heat source, uneven thermal expansion and contraction occur, resulting in residual stress and thermal deformation. The laser is refracted and deflected at the bending point of the inner diameter of the pipe wall. The two sets of laser transceivers 444 arranged at both ends of the pipe fitting can accurately determine the range of the bending point of the inner diameter of the pipe wall. The output end of the servo cylinder 42 pushes the push frame 441 to move the expansion mechanism 43 to the deformation position of the inner wall of the pipe diameter to compensate for the rounding. When the flange and the pipe fitting are self-rotating ring welding, the electromagnetic mechanism 45 fixes the flange and the pipe fitting to prevent the flange and the pipe fitting from deflecting and slipping, which causes welding failure.

[0036] like Figure 4 , Figure 5As shown, the diameter expansion mechanism 43 also includes a slide bar 432, a top plate 433, a main shaft 435, a rod frame 436, a sleeve 437, a first pulley plate 438 and a second pulley plate 439. The slide bar 432 and the main shaft 435 are fixedly connected to the bottom plate 431, the top plate 433 is fixedly connected to the main shaft 435 and the electric control cylinder 434, the rod frame 436 is fixedly connected to the output end of the electric control cylinder 434 and the first pulley plate 438, and the sleeve 437 is fixedly connected to the main shaft 435. Dynamic connection, an external thread 4371 is provided on the sleeve 437, a first threaded hole 4381 is provided on the first pulley plate 438, a second threaded hole 4391 and a first through hole 4392 are provided on the second pulley plate 439, the first through hole 4392 is slidably connected to the sliding rod 432, the first threaded hole 4381 and the second threaded hole 4391 are both threadedly connected to the external thread 4371, and the first threaded hole 4381 and the second threaded hole 4391 have opposite thread rotation directions.

[0037] Due to the rapid heating and cooling of the local high-temperature heat source, the pipe fittings produce uneven thermal expansion and contraction, resulting in residual stress and thermal deformation. In most cases, the circumferential contraction of the annular weld area causes the pipe diameter to decrease. In a small number of cases, the uneven contraction of the annular seam causes the circular cross-section to become elliptical, affecting the pipe docking and sealing performance. The driving motor 443 outputs a fixed-axis torque to the chassis 431. The chassis 431 is slidably assembled with the second pulley plate 439 through the sliding rod 432. The first pulley plate 438 is fixedly assembled through the top spindle 435, the top plate 433, the electric control cylinder 434, and the rod frame 436, driving the first pulley plate 438 and the second pulley plate 439 to rotate around the axis of the spindle 435. The first pulley plate 438 and the second pulley plate 439 are equipped with copper wheels. When the internal diameter of the pipe fitting is rotated to expand and correct the roundness, the heat dissipation of the high-temperature area of ​​the pipe fitting is accelerated. When the laser transceiver 444 recognizes that the bending curvature is large and the pipe is bent as a whole, the simple internal diameter expansion and rounding correction effect is not good. The output end of the electric control cylinder 434 drives the first pulley plate 438 to move through the rod frame 436. The first pulley plate 438 moves through the threaded assembly between the first threaded hole 4381, the second threaded hole 4391 and the external thread 4371. The sleeve 437 rotates around the axis of the main shaft 435 to transmit the torque to the second pulley plate 439. The first threaded hole 4381 and the second threaded hole 4391 have opposite thread rotation directions. The displacement directions of the first pulley plate 438 and the second pulley plate 439 are opposite. Through the reciprocating displacement of the output end of the electric control cylinder 434, the first pulley plate 438 and the second pulley plate 439 are synchronously relative or oppositely displaced to straighten the greatly bent area of ​​the inner diameter of the pipe when the pipe is rotated to expand the diameter and round it.

[0038] like Figure 3As shown, the distance adjustment mechanism 44 also includes a vertical circular plate 442, which is fixedly connected to the push frame 441, the drive motor 443, and the laser transceiver 444. The vertical circular plate 442 is provided with a second through hole 4421, and the drive motor 443 is rotatably connected to the second through hole 4421.

[0039] Two groups of laser transceivers 444 arranged at both ends of the pipe can accurately determine the range of the bending point of the inner diameter of the pipe wall. The output end of the servo cylinder 42 pushes the push frame 441 to move the expansion mechanism 43 to the deformation position of the inner wall of the pipe diameter. The driving motor 443 outputs a fixed axis torque to the chassis 431, driving the expansion mechanism 43 to compensate and correct the deformation position of the inner wall of the pipe diameter.

[0040] like Figure 6 As shown, the electromagnetic mechanism 45 also includes a ring rail frame 452, an electromagnetic ring platform 453 and an electromagnetic suction block 454. The ring rail frame 452 is fixedly connected to the side frame 451, the electromagnetic ring platform 453 is rotatably connected to the ring rail frame 452, and the electromagnetic suction block 454 is fixedly connected to the electromagnetic ring platform 453. The electromagnetic suction block 454 is provided with a plurality of groups, and the plurality of groups of electromagnetic suction blocks 454 are evenly distributed along the circumference of the electromagnetic ring platform 453.

[0041] Before welding, the electric push table 51 pushes a group of assembly frames 52 to move as a whole, and a plurality of groups of electromagnetic suction blocks 454 evenly distributed on the electromagnetic ring table 453 are attached to the gap between the flange and the steel pipe. The electromagnetic ring table 453 is energized to make the electromagnetic suction blocks 454 magnetically absorb the flange and the steel pipe. When the flange and the steel pipe are self-rotating for ring welding, the electromagnetic ring table 453 rotates on the ring rail frame 452 to prevent the flange and the pipe from deflecting and slipping, which causes welding failure.

[0042] like Figure 7 As shown, the clamping mechanism 5 also includes a servo motor 53, a pulley 54 and a claw disk mechanism 55. The output end of the electric push platform 51 is fixedly connected to a group of assembly frames 52, the servo motor 53 is fixedly connected to the assembly frame 52, the output end of the servo motor 53 is fixedly connected to the pulley 54, the assembly frame 52 is provided with a flange hole 521, the claw disk mechanism 55 also includes a rotating drum 551, the rotating drum 551 is provided with a belt groove 5511, the pulley 54 is connected to the belt groove 5511 through a belt drive, and the rotating drum 551 is rotatably connected to the flange hole 521.

[0043] Before welding, the two groups of flanges are clamped in two groups of claw disk mechanisms 55 respectively, and the output end of the electric push table 51 pushes one group of assembly frames 52 to move toward the other group of assembly frames 52. The pipe fittings are assembled between the two groups of flanges. The servo motor 53 outputs a fixed-axis torque to the pulley 54, and the torque is transmitted to the rotating drum 551 through the belt transmission between the pulley 54 and the belt groove 5511. The rotating drum 551 rotates in the flange hole 521, and the claw disk mechanism 55 drives the flange and the pipe fitting to rotate around their axis.

[0044] like Figure 7 As shown, the claw disk mechanism 55 also includes a three-jaw chuck 552 and a sliding claw 553. The three-jaw chuck 552 is fixedly connected to the rotating cylinder 551. The three-jaw chuck 552 is provided with a sliding groove 5521. The sliding groove 5521 and the sliding claw 553 are each provided with three groups. The three groups of sliding grooves 5521 and sliding claws 553 are evenly distributed along the circumference of the rotating cylinder 551. The sliding claw 553 is slidably connected to the sliding groove 5521. The sliding claw 553 is provided with a right-angle groove 5531. The right-angle groove 5531 is arranged on the sliding claw 553 away from the rotating cylinder 551.

[0045] The two groups of flanges are clamped in the two groups of claw mechanisms 55 respectively, and are synchronously displaced toward the center of the three-jaw chuck 552 through three groups of sliding claws 553 evenly distributed around the circumference. The flanges are clamped by the right-angle grooves 5531 on the sliding claws 553, completing the self-positioning clamping of the flanges and ensuring that the centers of the flanges at both ends are coaxial.

[0046] like Figure 8 As shown, the double-position welding gun 6 also includes a three-axis displacement module 62 and an elbow welding gun 63. The three-axis displacement module 62 and the elbow welding gun 63 are each provided with two groups. The two groups of three-axis displacement modules 62 and elbow welding guns 63 are respectively arranged at both ends of the base frame 61. The three-axis displacement module 62 is fixedly connected to the base frame 61 and the elbow welding gun 63.

[0047] During welding, two sets of three-axis displacement modules 62 arranged at both ends of the base frame 61 drive two sets of elbow welding guns 63, which are displaced in the three-axis space to the connection between the two sets of flanges and the annular seams of the steel pipes and fixed. The claw plate mechanism 55 drives the flanges and the pipe fittings to rotate around their axes, and the elbow welding guns 63 complete the annular seam welding of the flanges and the pipe fittings.

[0048] The working principle of the present invention is as follows: the clamping mechanism 5 clamps and assembles two sets of flanges at both ends of the pipe fitting, drives the flanges and the pipe fitting to rotate around their axes, the double-position welding gun 6 moves to the welding seams between the two sets of flanges and the pipe fitting, and the double-position welding gun 6 completes the welding seams at the connection between the flanges and the pipe fittings. The laser transceiver 444 transmits and receives lasers, and the laser is directly irradiated along the inner diameter of the pipe wall in the pipe fitting. When the pipe fitting is rapidly heated and cooled by the local high-temperature heat source, uneven thermal expansion and contraction occur, resulting in residual stress and thermal deformation. The laser is refracted and deflected at the bending point of the inner diameter of the pipe wall, and the range of the bending point of the inner diameter of the pipe wall is accurately determined. In most cases, the circumferential contraction of the annular weld area causes the pipe diameter to decrease. In a small number of cases, the uneven contraction of the annular seam causes the circular cross-section to become elliptical, affecting the pipe docking and sealing performance. The output end of the servo cylinder 42 pushes the push frame 441, and the diameter expansion mechanism 43 moves to the deformation position of the inner wall of the pipe diameter to compensate for the rounding. The drive motor 443 outputs a fixed-axis torque to drive the first pulley 438 and the second pulley 439 to rotate around the main The shaft 435 rotates on its axis, and the first pulley disc 438 and the second pulley disc 439 are equipped with copper wheels. When the internal diameter of the pipe is rotated to expand and correct the roundness, the heat dissipation of the high-temperature area of ​​the pipe is accelerated. When the laser transceiver 444 recognizes that the bending curvature is large and the pipe is bent as a whole, the simple internal diameter expansion and rounding effect is not good. The output end of the electric control cylinder 434 drives the first pulley disc 438 to move, and the sleeve is assembled through the first threaded hole 4381, the second threaded hole 4391 and the external thread 4371. The cylinder 437 rotates around the axis of the main shaft 435, the first threaded hole 4381 and the second threaded hole 4391 have opposite threads, the output end of the electric control cylinder 434 reciprocates, and the first pulley plate 438 and the second pulley plate 439 synchronously move relative to or towards each other to straighten the sharply bent area of ​​the inner diameter of the pipe fitting when the pipe fitting rotates to expand the diameter and correct the roundness, actively compensate and correct the thermal deformation of the pipe fitting, and the electromagnetic suction block 454 magnetically absorbs the flange and the steel pipe to avoid deflection and slippage of the flange and the pipe fitting, which causes welding failure.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A double-gun circumferential seam welding device for glass-lined pipe fittings, characterized in that: The welding equipment comprises a base (1), an assembly table (2), a light shielding door (3), a correction mechanism (4), a clamping mechanism (5) and a double-position welding gun (6); the correction mechanism (4) comprises an assembly frame (41); the clamping mechanism (5) comprises an electric push table (51) and an assembly frame (52); the assembly table (2) is provided with a side slide groove (21) and a top slide groove (22); the assembly frame (52) is provided with two groups, one group of the assembly frames (52) is fixedly connected to the assembly table (2); the other group of the assembly frames (52) is slidably connected to the top slide groove (22); the light shielding door (3) is slidably connected to the side slide groove (21); the assembly frame (41) is fixedly connected to the assembly frame (52); the double-position welding gun (6) comprises a base frame (61); the assembly table (2) is fixedly connected to the base (1) and the base frame (61).

2. The double-gun circumferential seam welding equipment for glass-lined pipe fittings according to claim 1, characterized in that: The correction mechanism (4) further comprises a servo cylinder (42), a diameter expansion mechanism (43), a distance adjustment mechanism (44) and an electromagnetic mechanism (45); the diameter expansion mechanism (43) comprises a chassis (431) and an electric control cylinder (434); the distance adjustment mechanism (44) comprises a push frame (441), a drive motor (443) and a laser transceiver (444); the electromagnetic mechanism (45) comprises a side frame (451); the servo cylinder (42) and the side frame (451) are both fixedly connected to the assembly frame (41); the output end of the servo cylinder (42) is fixedly connected to the push frame (441); the push frame (441) is slidably connected to the assembly frame (41); the chassis (431) is fixedly connected to the output end of the drive motor (443); the servo cylinder (42) and the electric control cylinder (434) are both connected to the laser transceiver (444) via electrical signals.

3. A double-gun circumferential seam welding device for glass-lined pipe fittings according to claim 2, characterized in that: The diameter expansion mechanism (43) further comprises a slide bar (432), a top plate (433), a main shaft (435), a rod frame (436), a sleeve (437), a first pulley disc (438) and a second pulley disc (439); the slide bar (432) and the main shaft (435) are fixedly connected to the bottom plate (431); the top plate (433) and the main shaft (435) and the electric control cylinder (434) are fixedly connected; the rod frame (436) and the output end of the electric control cylinder (434) and the first pulley disc (438) are fixedly connected; the sleeve (437) and the main shaft (431) are fixedly connected to each other; 5) rotational connection, the sleeve (437) is provided with an external thread (4371), the first pulley disc (438) is provided with a first threaded hole (4381), the second pulley disc (439) is provided with a second threaded hole (4391) and a first through hole (4392), the first through hole (4392) is slidably connected to the slide rod (432), the first threaded hole (4381) and the second threaded hole (4391) are both threadedly connected to the external thread (4371), and the first threaded hole (4381) and the second threaded hole (4391) have opposite threaded directions.

4. The double-gun circumferential seam welding equipment for glass-lined pipe fittings according to claim 2, characterized in that: The distance adjustment mechanism (44) further comprises a vertical circular plate (442), wherein the vertical circular plate (442) is fixedly connected to the push frame (441), the drive motor (443), and the laser transceiver (444), and a second through hole (4421) is provided on the vertical circular plate (442), and the drive motor (443) is rotatably connected to the second through hole (4421).

5. The double-gun circumferential seam welding equipment for glass-lined pipe fittings according to claim 2, characterized in that: The electromagnetic mechanism (45) further comprises a ring rail frame (452), an electromagnetic ring platform (453) and an electromagnetic suction block (454); the ring rail frame (452) is fixedly connected to the side frame (451); the electromagnetic ring platform (453) is rotatably connected to the ring rail frame (452); the electromagnetic suction block (454) is fixedly connected to the electromagnetic ring platform (453); a plurality of groups of the electromagnetic suction blocks (454) are arranged, and the plurality of groups of the electromagnetic suction blocks (454) are evenly distributed along the circumference of the electromagnetic ring platform (453).

6. The double-gun circumferential seam welding equipment for glass-lined pipe fittings according to claim 1, characterized in that: The clamping mechanism (5) further comprises a servo motor (53), a belt pulley (54) and a claw disk mechanism (55); the output end of the electric push platform (51) is fixedly connected to a group of assembly frames (52); the servo motor (53) is fixedly connected to the assembly frame (52); the output end of the servo motor (53) is fixedly connected to the belt pulley (54); a flange hole (521) is provided on the assembly frame (52); the claw disk mechanism (55) further comprises a rotating drum (551); a belt groove (5511) is provided on the rotating drum (551); the belt pulley (54) and the belt groove (5511) are connected via a belt transmission; and the rotating drum (551) is rotatably connected to the flange hole (521).

7. The double-gun circumferential seam welding equipment for glass-lined pipe fittings according to claim 6, characterized in that: The claw disk mechanism (55) further comprises a three-claw chuck (552) and a sliding claw (553). The three-claw chuck (552) is fixedly connected to the rotating cylinder (551). The three-claw chuck (552) is provided with a sliding groove (5521). The sliding groove (5521) and the sliding claw (553) are provided in three groups. The three groups of the sliding grooves (5521) and the sliding claw (553) are evenly distributed along the circumference of the rotating cylinder (551). The sliding claw (553) is slidably connected to the sliding groove (5521). The sliding claw (553) is provided with a right-angle groove (5531). The right-angle groove (5531) is provided on the sliding claw (553) on the side away from the rotating cylinder (551).

8. The double-gun circumferential seam welding equipment for glass-lined pipe fittings according to claim 1, characterized in that: The double-position welding gun (6) further comprises a three-axis displacement module (62) and an elbow welding gun (63), wherein the three-axis displacement module (62) and the elbow welding gun (63) are each provided with two groups, and the two groups of the three-axis displacement modules (62) and the elbow welding gun (63) are respectively arranged at two ends of the base frame (61), and the three-axis displacement module (62) is fixedly connected to the base frame (61) and the elbow welding gun (63).

Images