CN-122007568-A - Self-correcting submerged arc welding equipment for heat exchanger machining and welding process thereof

CN122007568ACN 122007568 ACN122007568 ACN 122007568ACN-122007568-A

Abstract

The application relates to a self-correcting submerged arc welding device for heat exchanger processing and a welding process thereof, which relate to the technical field of welding devices and comprise a frame connected with an outlet of a plate bending machine, wherein a mounting frame is further arranged on the frame in a lifting manner, a fixing component for clamping the peripheral wall of a heat exchange tube is further arranged on the frame, still be equipped with the soldered connection on the mounting bracket, the soldered connection rotate set up in on the mounting bracket, still be equipped with the angle modulation subassembly that the rotation angle of butt welding joint adjusted on the mounting bracket, one side of soldered connection is equipped with the scaling powder filler, the opposite side of soldered connection is equipped with the scaling powder recovery piece. The application has the effects of reducing welding deformation of the heat exchange tube in the welding process and improving the welding quality of the heat exchange tube.

Inventors

CHEN GENG
XU BO
Lei Jinlin
XIAO YUJIAO
SHI HUI
ZHANG QIUYAN
HE CHULIN
HU GUOTAO
HU GUOYONG
ZHOU HUI

Assignees

武汉东海石化重型装备有限公司

Dates

Publication Date: 20260512
Application Date: 20260325

Claims (7)

1. The self-correcting submerged arc welding equipment for machining the heat exchanger is characterized by comprising a frame (11) connected with an outlet of a plate bending machine (1), wherein a mounting frame (12) is further arranged on the frame (11) in a lifting mode, a fixing assembly (2) for clamping the peripheral wall of the heat exchange tube is further arranged on the frame (11), a welding head (13) is further arranged on the mounting frame (12), the welding head (13) is rotatably arranged on the mounting frame (12), an angle adjusting assembly (3) for adjusting the rotation angle of the welding head (13) is further arranged on the mounting frame (12), a soldering flux filling piece (4) is arranged on one side of the welding head (13), and a soldering flux recycling piece (42) is arranged on the other side of the welding head (13); The fixing assembly (2) comprises a fixing block (21) arranged on the frame (11) in a sliding manner and a driving wheel (22) arranged on the fixing block (21) in a rotating manner, the driving wheel (22) is movably attached to the peripheral wall of the heat exchange tube, the frame (11) is further provided with a supporting and tightening wheel (23) at the outlet of the plate bending machine (1), the fixing block (21) is provided with a plurality of fixing blocks (21) which are distributed at intervals along the circumferential direction of the heat exchange tube, the fixing blocks (21) and the supporting and tightening wheel (23) surround a clamping cavity (24) for clamping the heat exchange tube, and the frame (11) is further provided with a sliding part (25) for driving the fixing block (21) in a sliding manner; When the diameter of the heat exchange tube is increased, the sliding piece (25) drives the fixed blocks (21) to expand outwards, and the angle adjusting assembly (3) adjusts the welding head (13) to rotate to increase the clamping angle with the axis direction of the heat exchange tube; When the diameter of the heat exchange tube is reduced, the sliding piece (25) drives the fixed blocks (21) to slide inwards, and the angle adjusting component (3) adjusts the welding head (13) to rotate to reduce the included angle with the axis direction of the heat exchange tube.
2. The self-correcting submerged arc welding equipment for heat exchanger machining is characterized in that the sliding part (25) comprises an adjusting gear (251) rotatably arranged on the mounting frame (12), a fixing frame (252) relatively fixedly arranged on the frame (11) and a sliding rod (253) arranged on the fixing frame (252), tooth grooves (254) are formed in the sliding rod (253), the adjusting gear (251) is provided with two adjusting gears (251) which are oppositely arranged on two sides of the sliding rod (253), the adjusting gear (251) is meshed with the sliding rod (253), and a power part (255) for slidably adjusting the adjusting gear (251) is further arranged on the mounting frame (12).
3. The self-correcting submerged arc welding equipment for heat exchanger processing according to claim 2, wherein the soldering flux filling member (4) and the soldering flux recovering member (42) are arranged on two sides of the welding head (13) opposite to each other, the soldering flux filling member (4) comprises a solder head (41) arranged on the mounting frame (12), the soldering flux recovering member (42) comprises a negative pressure head (421) arranged on the mounting frame (12), the negative pressure head (421) and the solder head (41) are both arranged towards the surface of the heat exchange tube, the negative pressure head (421) and the solder head (41) are both arranged on the mounting frame (12) in a lifting manner, the mounting frame (12) is provided with an adjusting member (43) for adjusting the lifting sliding of the solder head (41) and the negative pressure head (421), and the mounting frame (12) is also provided with a synchronizing member (46) for adjusting the air output of the negative pressure head (421) and the discharge amount of the solder head (41); When the diameter of the heat exchange tube is larger, the height of the negative pressure head (421) and the height of the welding head (41) are adjusted by the adjusting piece (43), the air quantity of the negative pressure head (421) is larger, and the welding auxiliary quantity of the welding head (41) is smaller; when the diameter of the heat exchange tube is smaller, the height of the negative pressure head (421) and the height of the welding head (41) are adjusted by the adjusting piece (43), the air quantity of the negative pressure head (421) is smaller, and the welding auxiliary quantity of the welding head (41) is larger.
4. The self-correcting submerged arc welding equipment for heat exchanger machining according to claim 3, wherein the angle adjusting assembly (3) comprises a rotating block (31) rotatably arranged on the mounting frame (12), a limiting block (32) is fixedly connected to the frame (11), the welding head (13) is arranged on the rotating block (31), a limiting groove (33) is formed in the peripheral wall of the rotating block (31), the limiting groove (33) is spirally extended and distributed along the height direction of the rotating block (31), and the limiting block (32) is in sliding fit with the limiting groove (33).
5. The self-correcting submerged arc welding equipment for heat exchanger machining according to claim 4, wherein the adjusting piece (43) comprises a lifting rod (431) arranged on the rotating block (31) in a sliding mode, a lifting gear (433) is coaxially arranged on the lifting rod (431) in a rotating mode, a fixed block (21) is arranged at the output end of the power piece (255), a lifting gear ring (432) is arranged on the fixed block (21), the lifting gear (433) is meshed with an inner tooth groove (254) of the lifting gear ring (432), and the end side of the lifting rod (431) is in threaded fit with the lifting gear (433).
6. The self-rectifying submerged arc welding equipment for heat exchanger processing according to claim 5, wherein an air inlet (44) is formed in the negative pressure head (421), a feed opening (45) is formed in the solder head (41), the air inlet (44) and the solder head (41) are both arranged towards the outer Zhou Bibu of the heat exchange tube, the synchronous piece (46) comprises a first blocking plate (461) which is arranged in the air inlet (44) in a sliding manner and a second blocking plate (462) which is arranged in the solder head (41) in a sliding manner, the first blocking plate (461) is used for movably adjusting the size of the air inlet (44), and the second blocking plate (462) is used for adjusting the size of the feed opening (45); when the diameter of the heat exchange tube is increased, the solder head (41) and the negative pressure head (421) are lifted, the opening of the air inlet (44) is increased by the first plugging plate (461), and the opening of the blanking opening (45) is decreased by the second plugging plate (462); When the diameter of the heat exchange tube is reduced, the solder head (41) and the negative pressure head (421) are lowered, the opening of the air inlet (44) is reduced by the first plugging plate (461), and the opening of the blanking opening (45) is enlarged by the second plugging plate (462).
7. The submerged arc welding process for machining a heat exchanger of claim 6, comprising the steps of: S1, forming a tube blank, continuously curling raw materials with constant width and thickness into a cylinder shape by a plate bending machine (1), and continuously delivering the initially formed tube blank from an outlet into a welding station; S2, positioning the tube blank, wherein after the tube blank enters a welding station, the welding equipment clamps the tube blank through a plurality of circumferentially distributed fixed blocks (21) and a supporting wheel (23) according to the diameter of the target tube blank, and a driving force is provided for the rotation of the subsequent tube blank through the driving wheel (22) and the supporting wheel (23); s3, adjusting the angle of the welding gun, namely, when the fixed block (21) is slid according to the diameter, the lifting of the mounting frame (12) is self-adaptive to the angle of the butt welding joint (13) to be driven in a rotating mode, and meanwhile, when the mounting frame (12) is lifted, the heights of the welding head (41) and the negative pressure head (421) are adjusted; s4, carrying out welding treatment, namely blanking the soldering flux towards the surface of the heat exchange tube through a welding head (41), feeding the welding wire towards the welding seam through a welding head (13), welding the welding seam through induction heating generated by the welding head (13), carrying out auxiliary cooling on the surface of the heat exchange tube along with the welding head (13) through a negative pressure head (421), and recycling unmelted soldering flux.

Description

Self-correcting submerged arc welding equipment for heat exchanger machining and welding process thereof Technical Field The application relates to the technical field of heat exchanger shell welding, in particular to self-correcting submerged arc welding equipment for heat exchanger machining and a welding process thereof. Background The common shell-and-tube heat exchanger comprises a shell, a tube plate and a tube bundle, wherein cold and hot fluid respectively flows in the tube and at the shell side, and due to the requirements of the heat exchange tube on strength and pressure resistance, a spiral submerged arc welded tube is generally adopted for manufacturing the tube bundle under the working condition of high pressure and high temperature. Meanwhile, the inner wall of the spiral submerged arc welded pipe is uneven, so that fluid disturbance is increased in the spiral submerged arc welded pipe, and the heat exchange coefficient in the pipe is 2-3 times higher than that of the light pipe, and therefore the spiral submerged arc welded pipe is commonly used in a shell-and-tube heat exchanger. The spiral submerged-arc welded pipe is made by rolling steel strip into pipe blank according to a certain spiral angle and welding pipe seams, in the prior art, the spiral submerged-arc welded pipe is welded in the manufacturing process, the welding is carried out while the steel pipe is spirally formed, the submerged-arc inner welding is generally carried out near the engagement point immediately after the steel pipe is formed, the outer welding is carried out after the steel pipe passes through the screw pitch of zero point five or one point five, the spiral forming and the welding are continuously carried out, the steel pipe is cut off by adopting a fly cutting device after reaching a certain length, and the steel pipe is conveyed to a finishing process for inspection and treatment. One chinese patent document with publication number CN121131951a discloses a pre-welding deviation correcting device for submerged arc welding straight joint steel pipes, which comprises a processing table, a first linear slide rail module and a second linear slide rail module are installed at the top of the processing table, a submerged arc welding component is installed on the second linear slide rail module, a fixed plate is fixedly installed at the left end of the top of the processing table, a movable plate is installed on the first linear slide rail module, three-jaw chucks are installed on the movable plate and the fixed plate, sliding grooves are formed in the jaws of the three-jaw chucks, sliding blocks are slidingly connected in the sliding grooves, connecting rods are arranged on the outer sides of the sliding blocks, swing rods are sleeved on the outer sides of the two groups of connecting rods above, telescopic rods are arranged at the top of the swing rods, the telescopic rods can be locked on the swing rods, inner correcting rods are installed between the connecting rods on the two groups of the three-jaw chucks, and outer correcting rods are installed between the telescopic rods on the two groups of the three-jaw chucks. For the related technology, before the spiral submerged arc pipe is welded, the side of the steel plate is firstly required to be processed into an oblique notch, so that when the welding seam is welded, the welding seam is formed into a V-shaped welding seam, when the spiral submerged arc pipe is welded, the pipeline is required to be screwed into a circular pipe shape and then welded at the seam, when the pipeline is screwed forward, the welding seam is required to be filled with soldering flux, and then submerged arc welding is realized, when the pipeline is screwed forward, the soldering flux is difficult to fill, the welding wire is not easy to accurately correspond to the welding seam, the welding quality is easy to influence, and therefore the welding deformation of the heat exchange pipe is caused, and the heat exchange efficiency of a subsequent heat exchanger is influenced. Disclosure of Invention In order to reduce welding deformation of the heat exchange tube in the welding process and improve the welding quality of the heat exchange tube, the application provides self-correcting submerged arc welding equipment for heat exchanger processing and a welding process thereof. The application provides self-correcting submerged arc welding equipment for heat exchanger processing and a welding process thereof, which adopt the following technical scheme: the utility model provides a heat exchanger processing is with automatic deviation correcting formula submerged arc welding equipment, includes the frame that is connected with the export of veneer reeling machine, still be equipped with the mounting bracket in the frame over-and-under type, still be equipped with the fixed subassembly that carries out the centre gripping to the periphery wall of heat exchange tube in the frame, still be equipped