A welding device and a welding method for anticorrosion pipe

Abstract

This invention discloses a welding device and method for corrosion-resistant pipelines, relating to the field of pipeline welding technology. It includes a calibration welding mechanism and a welding fixing cylinder mounted on top of the calibration welding mechanism. The calibration welding mechanism has an alignment support mechanism at its bottom and an mounting ring at its top. The calibration welding mechanism includes a rotating connecting ring, with an adjusting motor fixedly mounted on its top. An adjusting main gear is fixedly connected to the output end of the adjusting motor, and an adjusting external gear ring is meshed with the bottom of the adjusting main gear. By observing the pressure sensor readings, it can be determined whether the center of the pipeline body and the center of the welding fixing cylinder are on the same horizontal line. By adjusting the height of the pipeline body, the pressure sensor readings are kept constant, indicating that the pipeline body and the welding fixing cylinder are on the same horizontal line, thus achieving the calibration of the welding fixing cylinder.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding technology, specifically to a welding apparatus and welding method for corrosion-resistant pipelines. Background Technology

[0002] Corrosion-resistant pipelines are pipelines designed to prevent corrosion in various environments. They typically involve coating the pipeline surface with anti-corrosion coatings, installing linings, or employing composite structures to resist the erosion of chemicals, moisture, soil, and other corrosive factors, thereby extending the pipeline's service life and ensuring the safe and reliable transport of various media in fields such as petroleum, chemical, and water supply and drainage.

[0003] Publication No. CN119017001A discloses a novel anti-corrosion pipe welding workbench. It uses two sets of fixing structures to secure the pipe, and the clamping structure and fixing rods allow the fixing structure to hold pipes of various sizes, making the pipe welding workbench suitable for multiple pipe sizes. The fixing rings, including an upper and lower ring, are hinged at one end and connected at the other end by a snap-fit ​​structure, making it easier for operators to place or remove pipes from the fixing rings. The inclusion of a first motor and a first worm gear enables the fixing structure to automatically clamp and secure the pipe. However, this patent still has the following problems in practical use:

[0004] Although this new type of anti-corrosion pipeline welding workbench uses two sets of fixed structures to fix the pipeline, during the welding of the anti-corrosion pipeline, if the bevel and both sides are not cleaned of oil, rust, moisture, etc., welding defects such as porosity and slag inclusion are easily caused. At the same time, it is not possible to quickly align the two anti-corrosion pipelines during welding. Misalignment leads to uneven stress on the weld, reduces the effective bearing area, and is prone to cracks or fractures at stress concentration points. Especially in pressure pipelines (such as oil, gas, and water systems), misalignment may lead to poor joint sealing and leakage.

[0005] Therefore, a welding device and welding method for corrosion-resistant pipelines are proposed to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a welding device and welding method for anti-corrosion pipelines, in order to solve the problems mentioned in the background art. When welding anti-corrosion pipelines, if the bevel and both sides are not cleaned properly, welding defects such as porosity and slag inclusions are easily caused. At the same time, the two anti-corrosion pipelines cannot be quickly aligned during welding, and misalignment leads to uneven stress on the weld, reducing the effective bearing area and making it easy for cracks or fractures to occur at stress concentration points. Especially in pressure pipelines (such as oil, gas, and water systems), misalignment may lead to poor sealing of the interface and cause leakage problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a welding device and welding method for corrosion-resistant pipelines, including a calibration welding mechanism and a welding fixing cylinder installed on the top of the calibration welding mechanism;

[0008] The bottom of the calibration welding mechanism is provided with an alignment support mechanism, and the top of the alignment support mechanism is provided with an installation ring.

[0009] Also includes:

[0010] The calibration welding mechanism includes a rotating connecting ring, an adjusting motor is fixedly installed on the top of the rotating connecting ring, an adjusting main gear is fixedly connected to the output end of the adjusting motor, and an adjusting external gear ring is meshed with the bottom of the adjusting main gear.

[0011] An adjusting rotating ring is fixedly installed on the inner side of the adjusting external gear ring, the adjusting rotating ring is rotatably connected to the rotating connecting ring, and an adjusting internal gear ring is fixedly installed on the inner side of the adjusting rotating ring.

[0012] The inner side of the adjusting internal gear ring is symmetrically connected to meshing gear rings, and bevel gear transmission assemblies are fixedly installed on the inner side of both meshing gear rings. An adjusting threaded rod is fixedly installed on one side of each of the two bevel gear transmission assemblies.

[0013] Preferably, both of the two adjusting threaded rods are threadedly connected to adjusting threaded sleeves on their outer sides, and both of the two adjusting threaded sleeves are fixedly mounted with adjusting sliding plates on their outer sides. A pressure sensor is fixedly mounted at the center of one side of the adjusting sliding plate, and a connecting spring is fixedly mounted on the outer side of the adjusting sliding plate near the pressure sensor. A connecting base is fixedly mounted on the ends of both the pressure sensor and the connecting spring.

[0014] By adopting the above technical solution, the regulating motor drives the regulating main gear to rotate. Utilizing the meshing connection between the regulating main gear and the regulating outer gear ring, the regulating outer gear ring drives the regulating rotating ring and the regulating inner gear ring to rotate. Utilizing the meshing connection between the regulating inner gear ring and the meshing gear ring, the meshing gear ring drives the bevel gear transmission assembly and the regulating threaded rod to rotate. Simultaneously, the regulating threaded sleeve drives the regulating sliding plate and the pressure sensor to move up and down. When the two top sides contact the surface of the pipe body, the bidirectional drive motor is activated to drive the drive main gear to rotate. Utilizing the meshing connection between the drive main gear and the drive driven gear ring, the drive driven gear ring drives the welding rotating ring and the rotating connecting ring to rotate. Simultaneously, the rotating connecting ring drives the grinding roller and the limiting roller to rotate. By observing the pressure sensor readings, it can be determined whether the center of the pipe body is on the same horizontal line as the center of the welded fixed cylinder.

[0015] Preferably, a grinding bracket is fixedly installed at the bottom of the connecting chassis, a grinding motor is fixedly installed on the outer side of the grinding bracket, a grinding roller is fixedly connected to the output end of the grinding motor, a rotating bracket is symmetrically rotatably connected to the bottom of the adjusting sliding plate, a rotating connecting rod is rotatably connected to the middle of each of the two rotating brackets, the rotating connecting rod is rotatably connected to the connecting chassis, a roller bracket is fixedly installed at the end of the rotating bracket, and a limit roller is rotatably connected inside the roller bracket.

[0016] By adopting the above technical solution, the connecting spring's elastic force is used to move the connecting chassis, the grinding bracket, and the grinding roller. The grinding motor is then started to rotate the grinding roller, which can grind the parts of the pipe body that need to be welded, and clean the iron filings from the surface of the pipe body.

[0017] Preferably, fixed support shafts are symmetrically installed on the outer side of the welding fixing cylinder, and fixed support frames are fixedly installed on the outer side of the two fixed support shafts. A bidirectional drive motor is fixedly installed at the top center of the welding fixing cylinder, and drive main gears are fixedly connected to the two output ends of the bidirectional drive motor. Drive driven gear rings are meshed at the bottom of the two drive main gears.

[0018] By adopting the above technical solution, the bidirectional drive motor is started to drive the main drive gear to rotate. Utilizing the meshing connection between the main drive gear and the driven gear ring, the driven gear ring drives the welded rotating ring to rotate.

[0019] Preferably, the drive toothed ring is rotatably connected to the welding fixed cylinder, a welding rotating ring is fixedly connected between the two drive toothed rings, the welding rotating ring is rotatably connected to the welding fixed cylinder, a welding torch and a flame torch are symmetrically installed inside the welding rotating ring, and the drive toothed ring is fixedly connected to the rotating connecting ring.

[0020] By adopting the above technical solution, the welding part of the pipeline body is heated by a flame torch, which can preheat the welding part and achieve uniform heating by rotation, thereby improving the preheating effect of the pipeline. Preheating can evaporate impurities such as oil and moisture near the bevel, reduce the hydrogen source, and reduce the risk of porosity and cracks, thereby improving the quality of pipeline body welding. Uniform welding of the pipeline body can be achieved by the welding torch.

[0021] Preferably, the alignment support mechanism includes an alignment bracket, the fixed support frame is fixedly installed on the top of the alignment bracket, the bottom of the alignment bracket is fixedly installed with support legs, one end of the alignment bracket is fixedly installed with an alignment motor, the output end of the alignment motor is fixedly connected with an alignment bidirectional threaded rod, and the outer side of the alignment bidirectional threaded rod is symmetrically threaded with an alignment threaded sleeve.

[0022] By adopting the above technical solution, the alignment motor drives the alignment bidirectional threaded rod to rotate, which causes the alignment threaded sleeve to move relative to the lifting base plate, thereby achieving the alignment of the welding parts of the two pipe bodies.

[0023] Preferably, the alignment bracket has symmetrically installed alignment sliding rods inside, and alignment sliding sleeves are symmetrically slidably connected to the outer sides of the two alignment sliding rods. A lifting base plate is fixedly installed on the top of the alignment sliding sleeve and the alignment threaded sleeve. The lifting base plate is slidably connected to the alignment bracket, and a lifting fixing rod is symmetrically installed on the top of the lifting base plate.

[0024] By adopting the above technical solution, and utilizing the sliding connection between the aligning sliding sleeve and the aligning sliding rod, stable sliding of the lifting base plate can be achieved.

[0025] Preferably, a lifting top plate is fixedly installed on the top of the two lifting fixed rods, a lifting motor is fixedly installed at the top center of the lifting top plate, a lifting threaded rod is fixedly connected to the output end of the lifting motor, a lifting threaded bracket is threadedly connected to the outer side of the lifting threaded rod, a lifting sliding rod is symmetrically installed on the top of the lifting threaded bracket, an installation bracket is fixedly installed on the top of the lifting sliding rod, an installation ring is fixedly installed on the top of the installation bracket, and a rotating motor is fixedly installed on the top of the installation ring.

[0026] By adopting the above technical solution, the lifting motor drives the lifting threaded rod to rotate, which in turn causes the lifting threaded bracket to move the lifting sliding rod and the mounting bracket up and down.

[0027] Preferably, the output end of the rotating motor is fixedly connected to a rotating main gear, the bottom of the rotating main gear is meshed with a rotating gear ring, a fixed cylinder is fixedly installed inside the rotating gear ring, several clamping bolts are threaded to both sides of the inside of the fixed cylinder, a clamping knob is fixedly installed at the end of the clamping bolt, a rotating bearing is rotatably connected to the end of the clamping bolt away from the clamping knob, a clamping anti-slip block is fixedly installed on one side of the rotating bearing, and a pipe body is provided between the clamping anti-slip blocks.

[0028] By adopting the above technical solution, the installation ring and the height of the pipe body can be adjusted to calibrate pipe bodies of different diameters. The rotating motor drives the rotating main gear to rotate, and the meshing connection between the rotating main gear and the rotating gear ring allows the rotating gear ring to drive the fixed cylinder and the pipe body to rotate. The rotation of the pipe body contacts the outer edge of the grinding roller, which can grind the end of the pipe body and further improve the welding effect of the pipe body. By rotating the clamping knob, the clamping bolt is rotated, and the movement of the clamping anti-slip block is realized under the action of the rotating bearing. The clamping anti-slip block can be used to clamp and fix pipe bodies of different sizes, improving the stability of pipe body welding.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: This welding device and method for anti-corrosion pipelines can determine whether the center of the pipeline body and the center of the welding fixing cylinder are on the same horizontal line by observing the pressure sensor value. By adjusting the height of the pipeline body, the pressure sensor value remains constant, indicating that the pipeline body and the welding fixing cylinder are on the same horizontal line. This achieves the calibration of the welding fixing cylinder, avoiding uneven stress on the weld due to misalignment, reduced effective bearing area, and cracks or fractures at stress concentration points. It also avoids poor joint sealing and leakage. Using a flame torch to heat the welding area of ​​the pipeline body preheats the welding area, and rotation ensures uniform heating, improving the preheating effect of the pipeline. Preheating evaporates oil, moisture, and other impurities near the bevel, reducing hydrogen sources and lowering the risk of porosity and cracks, thereby improving the quality of the pipeline body welding. The welding torch enables uniform welding of the pipeline body. The specific details are as follows:

[0030] 1. By setting up a calibration welding mechanism, the adjusting motor can drive the adjusting main gear to rotate. Utilizing the meshing connection between the adjusting main gear and the adjusting external gear ring, the adjusting external gear ring drives the adjusting rotating ring and the adjusting internal gear ring to rotate. Utilizing the meshing connection between the adjusting internal gear ring and the meshing gear ring, the meshing gear ring drives the bevel gear transmission assembly and the adjusting threaded rod to rotate. Simultaneously, the adjusting threaded sleeve drives the adjusting sliding plate and pressure sensor to move up and down. When the two top sides contact the surface of the pipe body, the bidirectional drive motor is activated to drive the driving main gear to rotate. Utilizing the meshing connection between the driving main gear and the driving driven gear ring, the driving driven gear ring drives the welding rotating ring and the rotating connecting ring to rotate. Simultaneously, the rotating connecting ring drives the grinding roller and the limiting roller to rotate. By observing the pressure sensor readings, it can be determined whether the center of the pipe body is on the same horizontal line as the center of the welding fixed cylinder. By adjusting the height of the pipe body, the pressure sensor reading remains constant. This indicates that the pipe body and the... The welding fixing cylinders are aligned on the same horizontal line, thus achieving calibration and preventing uneven stress on the weld due to misalignment, which reduces the effective bearing area and causes cracks or fractures at stress concentration points. It also prevents poor sealing at the interface, leading to leaks. The connecting spring's elasticity moves the connecting base, driving the grinding bracket and grinding rollers. The grinding motor rotates the grinding rollers, grinding the parts of the pipe body that need welding, cleaning away iron filings. After cleaning, the two pipe bodies are aligned, and the welding torch and flame torch rotate via the welding rotating ring. The flame torch heats the welding area of ​​the pipe body, preheating it. The rotation ensures uniform heating, improving the preheating effect. Preheating evaporates oil, moisture, and other impurities near the bevel, reducing hydrogen sources and lowering the risk of porosity and cracks, thereby improving the quality of the pipe body welding. The welding torch ensures uniform welding of the pipe body.

[0031] 2. By setting up an alignment support mechanism, the alignment motor can drive the alignment bidirectional threaded rod to rotate, causing the alignment threaded sleeve to move relative to the lifting base plate, thereby aligning the welding parts of the two pipe bodies. The lifting motor drives the lifting threaded rod to rotate, causing the lifting threaded bracket to move the lifting sliding rod and the mounting bracket up and down. By adjusting the height of the mounting ring and the pipe body, calibration of pipe bodies of different diameters can be performed. The rotating motor drives the rotating main gear to rotate, and the meshing connection between the rotating main gear and the rotating gear ring can cause the rotating gear ring to drive the fixed cylinder and the pipe body to rotate. The rotation of the pipe body contacts the outer edge of the grinding roller, which can grind the end of the pipe body, further improving the welding effect of the pipe body. By rotating the clamping knob, the clamping bolt is rotated, and under the action of the rotating bearing, the clamping anti-slip block is moved. The clamping anti-slip block can be used to clamp and fix pipe bodies of different sizes, improving the stability of pipe body welding. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0033] Figure 2 This is a three-dimensional structural diagram of the calibration welding mechanism in this invention;

[0034] Figure 3 This is a three-dimensional structural diagram of the welded fixed cylinder in this invention;

[0035] Figure 4 This is a schematic diagram of the three-dimensional structure of the welding rotating ring in this invention;

[0036] Figure 5 This is a three-dimensional structural diagram of the rotating connecting ring in this invention;

[0037] Figure 6 For the present invention Figure 5 Enlarged 3D structural diagram of region A in the middle;

[0038] Figure 7 This is a three-dimensional structural diagram of the grinding roller and the limiting roller in this invention;

[0039] Figure 8 This is a three-dimensional structural diagram of the alignment support mechanism in this invention;

[0040] Figure 9 This is a three-dimensional structural diagram of the lifting base plate in this invention;

[0041] Figure 10 This is a three-dimensional structural diagram of the lifting sliding rod and mounting bracket in this invention;

[0042] Figure 11 This is a schematic diagram of the three-dimensional structure of the fixed cylinder in this invention.

[0043] In the diagram: 1. Calibration welding mechanism; 101. Welding fixing cylinder; 102. Fixed support shaft; 103. Fixed support frame; 104. Bidirectional drive motor; 105. Drive main gear; 106. Drive driven toothed ring; 107. Welding rotating ring; 108. Welding torch; 109. Flame torch; 110. Rotating connecting ring; 111. Adjusting motor; 112. Adjusting main gear; 113. Adjusting external toothed ring; 114. Adjusting rotating ring; 115. Adjusting internal toothed ring; 116. Meshing toothed ring; 117. Bevel gear transmission assembly; 118. Adjusting threaded rod; 119. Adjusting threaded sleeve; 120. Adjusting sliding plate; 121. Pressure sensor; 122. Connecting spring; 123. Connecting chassis; 124. Grinding bracket; 125. Grinding motor; 126. Grinding roller; 127. Rotating support. 1. Frame; 128. Rotating connecting rod; 129. Roller bracket; 130. Limiting roller; 2. Alignment support mechanism; 201. Alignment bracket; 202. Support leg; 203. Alignment motor; 204. Alignment bidirectional threaded rod; 205. Alignment threaded sleeve; 206. Alignment sliding rod; 207. Alignment sliding sleeve; 208. Lifting base plate; 209. Lifting fixing rod; 210. Lifting top plate; 211. Lifting motor; 212. Lifting threaded rod; 213. Lifting threaded bracket; 214. Lifting sliding rod; 215. Mounting bracket; 216. Mounting ring; 217. Rotating motor; 218. Rotating main gear; 219. Rotating gear ring; 220. Fixing cylinder; 221. Clamping bolt; 222. Clamping knob; 223. Rotating bearing; 224. Clamping anti-slip block; 225. Pipe body. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figures 1-7 , Figures 9-10This invention provides a technical solution: a welding device and welding method for corrosion-resistant pipelines, including a calibration welding mechanism 1 and a welding fixing cylinder 101 installed on the top of the calibration welding mechanism 1. The bottom of the calibration welding mechanism 1 is provided with an alignment support mechanism 2, and the top of the alignment support mechanism 2 is provided with an mounting ring 216. The calibration welding mechanism 1 includes a rotating connecting ring 110, and an adjusting motor 111 is fixedly installed on the top of the rotating connecting ring 110. The output end of the adjusting motor 111 is fixedly connected to an adjusting main gear 112, and the bottom of the adjusting main gear 112 is meshed with an adjusting external gear ring 113. An adjusting rotating ring 114 is fixedly installed on the inner side of the adjusting external gear ring 113, and the adjusting rotating ring 114 is connected to the rotating... The connecting ring 110 is rotatably connected, and an adjusting internal gear ring 115 is fixedly installed on the inner side of the adjusting rotating ring 114. The inner side of the adjusting internal gear ring 115 is symmetrically connected to meshing gear rings 116. A bevel gear transmission assembly 117 is fixedly installed on the inner side of each of the two meshing gear rings 116. An adjusting threaded rod 118 is fixedly installed on one side of each of the two bevel gear transmission assemblies 117. An adjusting threaded sleeve 119 is threadedly connected to the outer side of each of the two adjusting threaded rods 118. An adjusting sliding plate 120 is fixedly installed on the outer side of each of the two adjusting threaded sleeves 119. A pressure sensor 121 is fixedly installed at the center of one side of the adjusting sliding plate 120. The adjusting motor 111 drives the adjusting main gear 112 to rotate, and the adjusting... The meshing connection between the main gear 112 and the adjusting external gear ring 113 causes the adjusting external gear ring 113 to drive the adjusting rotating ring 114 and the adjusting internal gear ring 115 to rotate. Utilizing the meshing connection between the adjusting internal gear ring 115 and the meshing gear ring 116, the meshing gear ring 116 drives the bevel gear transmission assembly 117 and the adjusting threaded rod 118 to rotate. Simultaneously, the adjusting threaded sleeve 119 drives the adjusting sliding plate 120 and the pressure sensor 121 to move up and down. When the two top sides contact the surface of the pipe body 225, the bidirectional drive motor 104 is activated, driving the drive main gear 105 to rotate. Utilizing the meshing connection between the drive main gear 105 and the drive driven gear ring 106, the drive driven gear ring 106... The rotating welding ring 107 and the rotating connecting ring 110 rotate, and at the same time, the rotating connecting ring 110 drives the grinding roller 126 and the limiting roller 130 to rotate. By observing the value of the pressure sensor 121, it can be determined whether the center of the pipe body 225 is on the same horizontal line as the center of the welding fixing cylinder 101. By adjusting the height of the pipe body 225, the value of the pressure sensor 121 is kept constant. This indicates that the pipe body 225 and the welding fixing cylinder 101 are on the same horizontal line, thereby achieving the calibration of the welding fixing cylinder 101. This avoids uneven stress on the weld due to misalignment, a reduction in the effective bearing area, and the occurrence of cracks or fractures at stress concentration points. It also avoids poor sealing of the interface, which could lead to leakage.

[0046] Please see Figures 2-7 , Figure 9 A connecting spring 122 is fixedly installed on the outer side of the adjusting sliding plate 120 near the pressure sensor 121. A connecting base 123 is fixedly installed on the ends of both the pressure sensor 121 and the connecting spring 122. A grinding bracket 124 is fixedly installed on the bottom of the connecting base 123. A grinding motor 125 is fixedly installed on the outer side of the grinding bracket 124. A grinding roller 126 is fixedly connected to the output end of the grinding motor 125. Rotating brackets 127 are symmetrically rotatably connected to the bottom of the adjusting sliding plate 120. Rotating connecting rods 128 are rotatably connected to the middle of each of the two rotating brackets 127. The rotating connecting rods 128 are connected to the connecting base 123. 23. A rotatable connection is made. A roller bracket 129 is fixedly installed at the end of the rotating bracket 127. A limit roller 130 is rotatably connected inside the roller bracket 129. Fixed support shafts 102 are symmetrically installed on the outer side of the welding fixed cylinder 101. Fixed support frames 103 are fixedly installed on the outer side of the two fixed support shafts 102. A bidirectional drive motor 104 is fixedly installed at the top center of the welding fixed cylinder 101. A drive main gear 105 is fixedly connected to the two output ends of the bidirectional drive motor 104. A drive driven gear ring 106 is meshed with the bottom of each of the two drive main gears 105. The drive driven gear ring 106 is connected to the welding fixed cylinder. A welding rotating ring 107 is fixedly connected between two drive gear rings 106 and 101. The welding rotating ring 107 is rotatably connected to the welding fixed cylinder 101. A welding torch 108 and a flame torch 109 are symmetrically installed inside the welding rotating ring 107. The drive gear ring 106 is fixedly connected to the rotating connecting ring 110. Utilizing the elastic force of the connecting spring 122, the connecting base 123 drives the grinding bracket 124 and the grinding roller 126 to move. The grinding motor 125 is started to drive the grinding roller 126 to rotate, which can grind the parts of the pipe body 225 that need to be welded, thus grinding the pipe body 225. 5. After cleaning the iron filings from the surface, align the two pipe bodies 225 and rotate the welding torch 108 and flame torch 109 via the welding rotating ring 107. The flame torch 109 heats the welding area of ​​the pipe body 225, which can preheat the welding area. The rotation can achieve uniform heating and improve the preheating effect of the pipe. Preheating can evaporate impurities such as oil and moisture near the bevel, reduce the hydrogen source, and reduce the risk of porosity and cracks, thereby improving the welding quality of the pipe body 225. The welding torch 108 can achieve uniform welding of the pipe body 225.

[0047] Please see Figures 1-2 , Figures 8-11The alignment support mechanism 2 includes an alignment bracket 201. A fixed support frame 103 is fixedly installed on the top of the alignment bracket 201. Support legs 202 are fixedly installed around the bottom of the alignment bracket 201. An alignment motor 203 is fixedly installed at one end of the alignment bracket 201. An alignment bidirectional threaded rod 204 is fixedly connected to the output end of the alignment motor 203. An alignment threaded sleeve 205 is symmetrically threaded to the outer side of the alignment bidirectional threaded rod 204. Alignment sliding rods 206 are symmetrically installed inside the alignment bracket 201. Alignment sliding sleeves 207 are symmetrically slidably connected to the outer sides of the two alignment sliding rods 206. A lifting base plate 208 is fixedly installed on the top of both the alignment sliding sleeve 207 and the alignment threaded sleeve 205. The lifting base plate 208 is slidably connected to the alignment bracket 201. Lifting fixing rods 209 are symmetrically installed on the top of the lifting base plate 208. A lifting top plate 210 is fixedly installed on the top of the two lifting fixing rods 209. A lifting motor 211 is fixedly installed at the top center of the 10. A lifting threaded rod 212 is fixedly connected to the output end of the lifting motor 211. A lifting threaded bracket 213 is threadedly connected to the outer side of the lifting threaded rod 212. A lifting sliding rod 214 is symmetrically installed on the top of the lifting threaded bracket 213. An installation bracket 215 is fixedly installed on the top of the lifting sliding rod 214. An installation ring 216 is fixedly installed on the top of the installation bracket 215. The alignment motor 203 drives the alignment bidirectional threaded rod 204 to rotate, causing the alignment threaded sleeve 205 to drive the lifting base plate 208 to move relative to each other, thereby achieving the alignment of the welding parts of the two pipe bodies 225. The lifting motor 211 drives the lifting threaded rod 212 to rotate, causing the lifting threaded bracket 213 to drive the lifting sliding rod 214 and the installation bracket 215 to move up and down. By adjusting the height of the installation ring 216 and the pipe body 225, the calibration of pipe bodies 225 of different diameters can be performed.

[0048] Please see Figures 8-11A rotating motor 217 is fixedly mounted on the top of the mounting ring 216. A rotating main gear 218 is fixedly connected to the output end of the rotating motor 217. A rotating gear ring 219 is meshed with the bottom of the rotating main gear 218. A fixed cylinder 220 is fixedly mounted inside the rotating gear ring 219. Several clamping bolts 221 are threadedly connected to both sides of the inside of the fixed cylinder 220. A clamping knob 222 is fixedly mounted on the end of the clamping bolt 221. A rotating bearing 223 is rotatably connected to the end of the clamping bolt 221 away from the clamping knob 222. A clamping anti-slip block 224 is fixedly mounted on one side of the rotating bearing 223. A pipe body 225 is provided between the clamping anti-slip blocks 224. The rotating motor 217 drives... The rotating main gear 218 rotates, and by utilizing the meshing connection between the rotating main gear 218 and the rotating gear ring 219, the rotating gear ring 219 can drive the fixed cylinder 220 and the pipe body 225 to rotate. By rotating the pipe body 225, it contacts the outer edge of the grinding roller 126, which can grind the end of the pipe body 225, further improving the welding effect of the pipe body 225. By rotating the clamping knob 222, the clamping bolt 221 is driven to rotate. Under the action of the rotating bearing 223, the clamping anti-slip block 224 is moved. The clamping anti-slip block 224 can be used to clamp and fix pipe bodies 225 of different sizes, improving the welding stability of the pipe body 225.

[0049] Working principle: Before using this welding device and method for corrosion-resistant pipelines, it is necessary to check the overall condition of the device to ensure it can operate normally. Figure 1 - Figure 11As shown, firstly, the middle part of the pipe body 225 is placed inside the fixed cylinder 220. By rotating the clamping knob 222, the clamping bolt 221 is rotated. Under the action of the rotating bearing 223, the clamping anti-slip block 224 is moved. The clamping anti-slip block 224 can be used to clamp and fix pipe bodies 225 of different sizes, improving the stability of the welding of the pipe body 225. The adjusting motor 111 drives the adjusting main gear 112 to rotate. Utilizing the meshing connection between the adjusting main gear 112 and the adjusting external gear ring 113, the adjusting external gear ring 113 drives the adjusting rotating ring 114 and the adjusting internal gear ring 115 to rotate. Utilizing the meshing connection between the adjusting internal gear ring 115 and the adjusting external gear ring 113, the adjusting rotating ring 114 and the adjusting internal gear ring 115 are rotated. The meshing connection between the meshing gear rings 116 causes the meshing gear rings 116 to drive the bevel gear transmission assembly 117 and the adjusting threaded rod 118 to rotate. At the same time, the adjusting threaded sleeve 119 drives the adjusting sliding plate 120 and the pressure sensor 121 to move up and down. When the two top sides of the top are in contact with the surface of the pipe body 225, the bidirectional drive motor 104 is started to drive the drive main gear 105 to rotate. Utilizing the meshing connection between the drive main gear 105 and the drive driven gear ring 106, the drive driven gear ring 106 drives the welding rotating ring 107 and the rotating connecting ring 110 to rotate. At the same time, the rotating connecting ring 110 drives the grinding roller 126 and the limiting roller 130 to rotate.

[0050] Secondly, by observing the value of pressure sensor 121, it can be determined whether the center of the pipe body 225 is on the same horizontal line as the center of the welded fixed cylinder 101. The lifting motor 211 drives the lifting threaded rod 212 to rotate, causing the lifting threaded bracket 213 to move the lifting sliding rod 214 and the mounting bracket 215 up and down. By adjusting the height of the mounting ring 216 and the pipe body 225, calibration of pipe bodies 225 with different diameters can be performed, keeping the value of pressure sensor 121 constant. This indicates that the pipe body 225 and the welded fixed cylinder 101 are aligned horizontally. 01 is on the same horizontal line, thereby realizing the calibration of the welding fixing cylinder 101, avoiding uneven stress on the weld due to misalignment, reducing the effective bearing area, and causing cracks or fractures at stress concentration points. At the same time, it avoids poor sealing of the interface and leakage. Utilizing the elastic force of the connecting spring 122, the connecting base 123 drives the grinding bracket 124 and grinding roller 126 to move. The grinding motor 125 is started to drive the grinding roller 126 to rotate, which can grind the parts of the pipe body 225 that need to be welded and clean the iron filings on the surface of the pipe body 225.

[0051] Finally, after cleaning the iron filings, the alignment motor 203 drives the alignment bidirectional threaded rod 204 to rotate, causing the alignment threaded sleeve 205 to move relative to the lifting base plate 208, thereby aligning the welding parts of the two pipe bodies 225. The welding rotating ring 107 drives the welding torch 108 and the flame torch 109 to rotate. The flame torch 109 heats the welding parts of the pipe body 225, preheating the welding parts. The rotation ensures uniform heating, improving the preheating effect of the pipe. Preheating evaporates impurities such as oil and moisture near the bevel, reducing the hydrogen source and lowering the risk of porosity and cracks, thereby improving the welding quality of the pipe body 225. The welding torch 108 enables uniform welding of the pipe body 225.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding apparatus for corrosion-resistant pipelines, comprising a calibration welding mechanism (1) and a welding fixing cylinder (101) mounted on top of the calibration welding mechanism (1). The bottom of the calibration welding mechanism (1) is provided with an alignment support mechanism (2), and the top of the alignment support mechanism (2) is provided with an installation ring (216). Its features are, Also includes: The calibration welding mechanism (1) includes a rotating connecting ring (110), an adjusting motor (111) is fixedly installed on the top of the rotating connecting ring (110), an adjusting main gear (112) is fixedly connected to the output end of the adjusting motor (111), and an adjusting external gear ring (113) is meshed with the bottom of the adjusting main gear (112). Among them, an adjusting rotating ring (114) is fixedly installed on the inner side of the adjusting external gear ring (113), the adjusting rotating ring (114) is rotatably connected to the rotating connecting ring (110), and an adjusting internal gear ring (115) is fixedly installed on the inner side of the adjusting rotating ring (114). Among them, the inner side of the adjusting internal gear ring (115) is symmetrically connected to the meshing gear ring (116), and the inner side of the two meshing gear rings (116) is fixedly installed with bevel gear transmission assembly (117), and the side of the two bevel gear transmission assembly (117) is fixedly installed with adjusting thread rod (118).

2. The welding device for corrosion-resistant pipelines according to claim 1, characterized in that: The outer sides of the two adjusting threaded rods (118) are threaded with adjusting threaded sleeves (119), and the outer sides of the two adjusting threaded sleeves (119) are fixedly installed with adjusting sliding plates (120). A pressure sensor (121) is fixedly installed at the center of one side of the adjusting sliding plate (120). A connecting spring (122) is fixedly installed on the outer side of the adjusting sliding plate (120) near the pressure sensor (121). A connecting base (123) is fixedly installed at the ends of the pressure sensor (121) and the connecting spring (122).

3. The welding device for corrosion-resistant pipelines according to claim 2, characterized in that: A grinding bracket (124) is fixedly installed at the bottom of the connecting chassis (123). A grinding motor (125) is fixedly installed on the outside of the grinding bracket (124). A grinding roller (126) is fixedly connected to the output end of the grinding motor (125). A rotating bracket (127) is symmetrically rotatably connected to the bottom of the adjusting sliding plate (120). A rotating connecting rod (128) is rotatably connected to the middle of each of the two rotating brackets (127). The rotating connecting rod (128) is rotatably connected to the connecting chassis (123). A roller bracket (129) is fixedly installed at the end of the rotating bracket (127). A limit roller (130) is rotatably connected inside the roller bracket (129).

4. The welding device for corrosion-resistant pipelines according to claim 3, characterized in that: Fixed support shafts (102) are symmetrically installed on the outer side of the welding fixed cylinder (101). Fixed support frames (103) are fixedly installed on the outer side of the two fixed support shafts (102). A bidirectional drive motor (104) is fixedly installed at the top center of the welding fixed cylinder (101). The two output ends of the bidirectional drive motor (104) are fixedly connected to drive main gears (105). The bottoms of the two drive main gears (105) are meshed with drive driven gear rings (106).

5. A welding device for corrosion-resistant pipelines according to claim 4, characterized in that: The drive gear ring (106) is rotatably connected to the welding fixing cylinder (101). A welding rotating ring (107) is fixedly connected between the two drive gear rings (106). The welding rotating ring (107) is rotatably connected to the welding fixing cylinder (101). A welding torch (108) and a flame torch (109) are symmetrically installed inside the welding rotating ring (107). The drive gear ring (106) is fixedly connected to the rotating connecting ring (110).

6. A welding device for corrosion-resistant pipelines according to claim 5, characterized in that: The alignment support mechanism (2) includes an alignment bracket (201), a fixed support frame (103) is fixedly installed on the top of the alignment bracket (201), support legs (202) are fixedly installed around the bottom of the alignment bracket (201), an alignment motor (203) is fixedly installed at one end of the alignment bracket (201), an alignment bidirectional threaded rod (204) is fixedly connected to the output end of the alignment motor (203), and an alignment threaded sleeve (205) is symmetrically threaded on the outer side of the alignment bidirectional threaded rod (204).

7. A welding device for corrosion-resistant pipelines according to claim 6, characterized in that: The alignment bracket (201) is symmetrically equipped with alignment sliding rods (206) inside. Alignment sliding sleeves (207) are symmetrically slidably connected to the outer sides of the two alignment sliding rods (206). Lifting base plates (208) are fixedly installed on the top of the alignment sliding sleeves (207) and the alignment threaded sleeves (205). The lifting base plates (208) are slidably connected to the alignment bracket (201). Lifting fixing rods (209) are symmetrically installed on the top of the lifting base plates (208).

8. A welding device for corrosion-resistant pipelines according to claim 7, characterized in that: A lifting top plate (210) is fixedly installed on the top of the two lifting fixed rods (209). A lifting motor (211) is fixedly installed at the center of the top of the lifting top plate (210). A lifting threaded rod (212) is fixedly connected to the output end of the lifting motor (211). A lifting threaded bracket (213) is threadedly connected to the outer side of the lifting threaded rod (212). A lifting sliding rod (214) is symmetrically installed on the top of the lifting threaded bracket (213). An installation bracket (215) is fixedly installed on the top of the lifting sliding rod (214). An installation ring (216) is fixedly installed on the top of the installation bracket (215). A rotating motor (217) is fixedly installed on the top of the installation ring (216).

9. A welding device for corrosion-resistant pipelines according to claim 8, characterized in that: The output end of the rotating motor (217) is fixedly connected to a rotating main gear (218), and a rotating gear ring (219) is meshed with the bottom of the rotating main gear (218). A fixed cylinder (220) is fixedly installed inside the rotating gear ring (219). Several clamping bolts (221) are threadedly connected to both sides of the inside of the fixed cylinder (220). A clamping knob (222) is fixedly installed at the end of the clamping bolt (221). A rotating bearing (223) is rotatably connected to the end of the clamping bolt (221) away from the clamping knob (222). A clamping anti-slip block (224) is fixedly installed on one side of the rotating bearing (223). A pipe body (225) is provided between the clamping anti-slip blocks (224).

10. A method for processing a welding device for corrosion-resistant pipelines, employing the welding device for corrosion-resistant pipelines as described in claim 9, characterized in that, The welding method steps are as follows: Step 1: Place the middle part of the pipe body (225) into the inside of the fixed cylinder (220). Rotate the clamping knob (222) to drive the clamping bolt (221) to rotate. Under the action of the rotating bearing (223), the clamping anti-slip block (224) moves. The clamping anti-slip block (224) can clamp and fix pipe bodies (225) of different sizes. The adjusting motor (111) drives the adjusting main gear (112) to rotate. Utilizing the meshing connection between the adjusting main gear (112) and the adjusting external gear ring (113), the adjusting external gear ring (113) drives the adjusting rotating ring (114) and the adjusting internal gear ring (115) to rotate. Utilizing the meshing connection between the adjusting internal gear ring (115) and the meshing gear ring (116), the adjusting internal gear ring (115) rotates. The meshing connection allows the meshing gear ring (116) to drive the bevel gear transmission assembly (117) and the adjusting threaded rod (118) to rotate. At the same time, the adjusting threaded sleeve (119) drives the adjusting sliding plate (120) and the pressure sensor (121) to move up and down. When the two top sides of the top are in contact with the surface of the pipe body (225), the bidirectional drive motor (104) is started to drive the drive main gear (105) to rotate. Utilizing the meshing connection between the drive main gear (105) and the drive driven gear ring (106), the drive driven gear ring (106) drives the welding rotating ring (107) and the rotating connecting ring (110) to rotate. At the same time, the rotating connecting ring (110) drives the grinding roller (126) and the limiting roller (130) to rotate. Step 2: By observing the value of the pressure sensor (121), it can be determined whether the center of the pipe body (225) is on the same horizontal line as the center of the welded fixed cylinder (101). The lifting motor (211) drives the lifting threaded rod (212) to rotate, so that the lifting threaded bracket (213) drives the lifting sliding rod (214) and the mounting bracket (215) to move up and down. By adjusting the height of the mounting ring (216) and the pipe body (225), the pipe bodies (225) of different diameters can be calibrated, so that the pressure sensor (121) can move up and down. The value of ) remains constant. This indicates that the pipe body (225) and the welding fixing cylinder (101) are on the same horizontal line, thereby achieving the calibration of the welding fixing cylinder (101). Using the elastic force of the connecting spring (122), the connecting base (123) drives the grinding bracket (124) and the grinding roller (126) to move. The grinding motor (125) is started to drive the grinding roller (126) to rotate, which can grind the parts of the pipe body (225) that need to be welded and clean the iron filings on the surface of the pipe body (225). Step 3: After cleaning the iron filings, the alignment motor (203) drives the alignment bidirectional threaded rod (204) to rotate, so that the alignment threaded sleeve (205) drives the lifting base plate (208) to move relative to each other, thereby aligning the welding parts of the two pipe bodies (225). The welding rotating ring (107) drives the welding torch (108) and the flame torch (109) to rotate. The flame torch (109) heats the welding parts of the pipe body (225), which can preheat the welding parts. The rotation method can achieve uniform heating, improve the preheating effect of the pipe. Preheating can evaporate oil, water and other impurities near the bevel, reduce the hydrogen source, and reduce the risk of porosity and cracks.

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