Bimetal composite pipe end welding device and method

Abstract

The invention discloses a bimetal composite pipe end welding device and method, and relates to the technical field of welding, the bimetal composite pipe end welding device and method comprise a base, a fixing plate and a welding mechanism, the fixing plate is arranged on the top of the base, the welding mechanism is arranged on the inner side of the fixing plate, and the welding mechanism is arranged on the inner side of the fixing plate. The welding mechanism comprises a first motor, cutting machines, a spring telescopic rod, a second welding machine mechanism and a protective barrel plug, the first motor is used for driving the cutting machines to conduct position adjustment according to the size of an actually-welded pipeline, and after the multiple cutting machines cut the outer layer of a section of double-layer pipeline, the argon arc welding machine mechanism on the mounting ring is driven to surround the outer side of the pipeline; the outer layer welding is completed according to the inner layer welding principle, overall welding of the bimetal composite pipe is achieved, the problems of weld cracks and air holes caused by traditional bimetal composite pipe welding are avoided, the welding quality is improved, the production cost is reduced, and the working time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular to a bimetallic composite pipe end welding device and method. Background Art

[0002] Bimetallic composite pipes are made by combining two different metal pipes through a specific process. They usually have carbon steel or alloy steel as the base layer and a corrosion-resistant and wear-resistant metal lining layer such as stainless steel and copper. This composite structure enables bimetallic composite pipes to combine the high strength of the base metal with the excellent corrosion resistance and wear resistance of the lining metal.

[0003] Because bimetallic composite pipes can effectively reduce costs and increase the service life of pipelines, they are currently widely used in many fields such as petroleum, chemical industry, electric power, metallurgy, etc. However, due to the unique multi-material situation of bimetallic composite pipes themselves, the welding quality cannot be well guaranteed when welding them. Therefore, a bimetallic composite pipe end welding device is needed.

[0004] However, the existing bimetallic composite pipe end welding device has the following shortcomings:

[0005] 1) When welding bimetallic composite pipes currently on the market, due to the presence of multiple metals with different melting points and thermal expansion coefficients, large residual stress is generated in the weld and heat-affected zone, resulting in cracks and pores in the weld, reducing welding quality and increasing production costs and working time.

[0006] Therefore, we propose a bimetallic composite pipe end welding device and method to solve the above problems. Summary of the Invention

[0007] The present invention provides a bimetallic composite pipe end welding device and method. First, two pipe sections to be welded are sequentially passed through and placed within a mounting ring. A first motor is activated to drive a threaded rod, which moves a bolt according to the principle of threading. Then, a cutting machine is activated to cut the pipe to be welded. A third motor is activated to rotate a gear, and the mounting frame and the cutting machine thereon are rotated together through the gear and the ring gear, thereby performing a circular cut on the pipe. An ultrasonic generator is activated to detect the interior of the pipe being cut. After the cut is completed, the outer layer of the cut pipe section is peeled off. Then, the first motor is activated again to adjust the cutting machine to the inner portion of the other pipe section. At this time, there are two splicing points on the two pipe sections, and the outer splicing point is staggered from the inner splicing point. The electric telescopic rod is activated to drive the protective sleeve plug from the interior of the pipe to the inner splicing point. The electronic slide rod is activated to drive the movable frame to move. The movable frame rotates among the rotating rod and the cleaning brush, and the bottom of the cleaning brush rotates with the brush groove. Therefore, the cleaning brush swings left and right as the movable frame moves, blowing hot air through the air outlet to reduce the surrounding humidity.

[0008] To achieve the above objectives, the present invention provides the following technical solutions: a bimetallic composite pipe end welding device and method, comprising a base, a fixing plate, and a welding mechanism, wherein the fixing plate is mounted on the top of the base, and the welding mechanism is disposed on the inner side of the fixing plate;

[0009] The welding mechanism includes a first motor, a cutting machine, a spring telescopic rod, a second welding machine mechanism and a protective cylinder plug. The first motor is used to drive the cutting machine to adjust its position according to the actual size of the welded pipe. After the multiple cutting machines have completed cutting the outer layer of a double-layer pipe, they are again driven by the first motor to adjust their positions inside another double-layer pipe, and then cut the inner layer of the other double-layer pipe. When cutting the two double-layer pipes, the cut ends of the double-layer pipes are polished by the side of the cutting blade on the cutting machine. Finally, the second welding machine mechanism is used to weld the two double-layer pipes first to prepare the bottom. At the same time, the protective cylinder plug is used to control the air humidity, temperature and protective gas inside the pipe.

[0010] Preferably, the welding mechanism also includes a rotating frame, which is installed on the inner side of the fixed plate, and the inner side of the rotating frame is rotatably connected to a rotating slide rail, and the inner side of the rotating slide rail is fixedly connected to a mounting ring, and a gear ring is installed at the other end of the outer side of the mounting ring, and the inner side of the mounting ring is fixedly connected to the first motor, and the output end of the first motor is fixedly connected to a threaded rod, and a mounting frame is installed on the outer side of the mounting ring, and a bolt is installed on the inner side of the mounting frame, and the bolt is threadedly connected to the threaded rod, and the outer side of the mounting frame is fixedly connected to the cutting machine.

[0011] Preferably, a welding frame is provided at the bottom of the mounting frame, the welding frame is fixedly connected to the mounting frame, an electric slide rod is installed on the inner side of the welding frame, a displacement controller is slidably connected to the outer side of the welding frame, and the electric slide rod is threadedly connected to the displacement controller.

[0012] Preferably, an argon arc welding head is installed on the outside of the displacement sensor, an arc pressure sensor is installed on the bottom of the displacement controller, an arc pressure controller is installed on the outside of the argon arc welding head, a filter probe is installed on the other end of the arc pressure controller, an automatic welding wire ball is installed on the top of the welding frame, and a lifting platform is installed on the top of the base.

[0013] Preferably, a plurality of rotating rims are provided on the top of the lifting platform, anti-slip wheels are installed on the inner sides of the plurality of rotating rims, the inner sides of the plurality of rotating rims are rotatably connected to the spring telescopic rod, and the other end of the spring telescopic rod is rotatably connected to a fixed central axis.

[0014] Preferably, a mounting shaft is installed on the inner side of the fixed central axis, the inner middle part of the mounting shaft is fixedly connected to the second welding machine mechanism, a second motor is installed on the other end of the mounting shaft, the second motor is fixedly connected to the fixed central axis on the other side, a plurality of wheel grooves are opened on the inner side of the rotating wheel rim, and the plurality of anti-slip wheels are sequentially installed on the inner side of the wheel grooves, and the wheel body of the anti-slip wheel is a shock-absorbing wheel.

[0015] Preferably, an electric telescopic rod is installed on the inner side of the other end of the base, the outer side of the electric telescopic rod is fixedly connected to the protective tube plug, the outer side of the protective tube plug is provided with an air blowing port, the inner side of the protective tube plug is provided with a brush groove, the inner wall of the brush groove is fixedly connected to an electronic sliding rod, the top of the threaded rod is rotatably connected to a sliding block, the outer side of the sliding block is slidably connected to a protective sleeve, the outer side of the protective sleeve is fixedly connected to a plurality of scale lines, and the outer side of the protective sleeve is provided with a plurality of block slides.

[0016] Preferably, a movable frame is installed on the outer side of the electronic slide bar, and a plurality of cleaning brushes are rotatably connected to the inner side of the movable frame. The bottom of the cleaning brush is rotatably connected to a rotating rod, and the rotating rod is rotatably connected to the inner side of the brush groove.

[0017] Preferably, the rotating rod is rotatably connected to the movable frame, an ultrasonic generator is provided on the top of the base, the ultrasonic generator is fixedly connected to the fixed plate, a signal transceiver is installed on the top of the base, a third motor is installed on the other side of the top of the base, the output end of the third motor is fixedly connected to a gear, and the gear is engaged with the ring gear.

[0018] A method for using a bimetallic composite pipe end welding device comprises the following steps:

[0019] Step 1: First, adjust the corresponding positions of each cutting machine through the first motor, and then cut and adjust the welding part of the pipe to be welded;

[0020] Step 2: Start the anti-slip wheel to bring the second welding machine mechanism into the inner side of the required welding pipe, and perform bottom welding on the inner side of the pipe;

[0021] Step 3: The thread relationship between the threaded rod and the bolt, and the rotation relationship between the rotating wheel ring and the spring telescopic rod increase the applicability of the device, and can be equipped with different welding equipment and cutting equipment;

[0022] Step 4: Finally, use the protective plug to control the humidity and oxygen inside the pipe to be welded.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention improves the welding quality of bimetallic composite pipes and avoids the drawbacks of conventional welding. First, the interfaces of the two sections of pipes to be welded are placed on the inner sides of four cutting machines, the first motor is started to drive the threaded rod, which drives the mounting frame to move. After adjusting the position of the cutting machine, cutting is started at the same time. The third motor is started, and the cutting machine is linked with the gear ring to cut the pipe in a circular shape. The number of cutting machines is four and works simultaneously, which improves efficiency and reduces deviation. During cutting, the ultrasonic generator detects the inside of the pipe in real time, and the signal transceiver monitors the progress of the outer layer cutting to avoid damaging the inner layer. After the cutting is completed, the outer layer is peeled off, and then the cutting machine is adjusted to peel off the inner layer of another section of the pipe. After ensuring that the peeling lengths of the two sections of the pipe are consistent, they are docked so that the splicing of the inner and outer layers is staggered. Subsequently, the electric telescopic rod pushes the protective cylinder plug to the inner layer splicing, the electronic slide rod drives the moving frame to move, and the linked cleaning brush swings to clean the welding point. When the protective cylinder plug detects high humidity, hot air is blown out through the air port for dehumidification. At the same time, it and the cleaning brush jointly block air from entering the pipe. Then, according to the material and specifications of the pipeline, the appropriate welding machine mechanism is selected and the parameters are adjusted. The anti-skid wheel is started, and the rotating wheel rim is driven to carry the second welding machine mechanism into the pipeline. After reaching the inner layer joint, the spring telescopic rod can adapt to different pipe diameters according to the adaptive adjustment function, and at the same time fix and connect the rotating wheel rim. The filter probe of the second welding mechanism captures the image in real time, and cooperates with the electric slide bar to accurately position the welding head. The welder and the second motor are started to rotate the entire welding machine mechanism to complete the inner layer welding of the pipeline. During the welding process, the filter probe continuously monitors the quality. The arc pressure sensor, controller and displacement controller work together to ensure that the arc pressure is stable. After the inner layer welding is completed, the third motor is started to drive the gear ring to drive the argon arc welding machine mechanism on the mounting ring to surround the outside of the pipeline. The inner layer welding principle is used to complete the outer layer welding, realizing the overall welding of the bimetallic composite pipe, thereby avoiding the weld cracks and porosity problems caused by traditional bimetallic composite pipe welding, thereby increasing welding quality and reducing production costs and working time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a perspective view of the main structure of a bimetallic composite pipe end welding device of the present invention;

[0026] Figure 2 This is an exploded perspective view of a welding mechanism in a bimetallic composite pipe end welding device of the present invention;

[0027] Figure 3 This is a partial structural perspective diagram of a bimetallic composite pipe end welding device of the present invention;

[0028] Figure 4 for Figure 3 A magnified view of point A in the figure;

[0029] Figure 5 This is a partially exploded perspective view of the welding mechanism in a bimetallic composite pipe end welding device of the present invention;

[0030] Figure 6 This is a partial structural diagram of a welding mechanism in a bimetallic composite pipe end welding device of the present invention;

[0031] Figure 7 This is a rear perspective view of a bimetallic composite pipe end welding device according to the present invention.

[0032] In the figure: 1, base; 2, fixed plate; 3, welding mechanism; 301, rotating frame; 302, rotating slide; 303, first motor; 304, threaded rod; 305, bolt; 306, mounting frame; 307, cutting machine; 308, protective sleeve; 309, sliding block; 310, block slide; 311, scale line; 312, automatic welding wire group; 313, welding machine frame; 314, displacement controller; 315, argon arc welding head; 316, arc pressure sensor; 317, arc pressure controller; 318, filter probe; 31 9. Lifting platform; 320. Rotating wheel rim; 321. Anti-skid wheel; 322. Spring telescopic rod; 323. Fixed central axis; 324. Mounting axis; 325. Second welding mechanism; 326. Second motor; 327. Electric telescopic rod; 328. Protective cylinder plug; 329. Air outlet; 330. Electronic slide; 331. Moving frame; 332. Cleaning brush; 333. Ultrasonic generator; 334. Signal transceiver; 335. Third motor; 336. Gear; 337. Gear ring; 338. Mounting ring; 339. Electric slide. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] Example 1, as Figures 1-4 As shown, in order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bimetallic composite pipe end welding device and method, comprising a base 1, a fixing plate 2 and a welding mechanism 3, wherein the fixing plate 2 is mounted on the top of the base 1, and the welding mechanism 3 is arranged on the inner side of the fixing plate 2. The welding mechanism 3 comprises a first motor 303, a cutter 307, a spring telescopic rod 322, a second welding mechanism 325 and a protective tube plug 328. The first motor 303 is used to drive the cutter 307 to adjust its position according to the actual size of the welded pipe. After the multiple cutters 307 have cut the outer layer of a section of the double-layer pipe, they are again The first motor 303 is driven to adjust its position inside the other double-layer pipe, and then the inner layer of the other double-layer pipe is cut. When the two double-layer pipes are cut, the cutting blade on the cutting machine 307 is used to grind the cut of the double-layer pipe. Finally, the second welding machine mechanism 325 is used to weld the two double-layer pipes first, and the air humidity, temperature and protective gas inside the pipe are controlled by the protective tube plug 328. The welding mechanism 3 also includes a rotating frame 301, which is arranged on the inner side of the fixed plate 2. The inner side of the rotating frame 301 is connected to the inner side of the fixed plate 2. There is a rotating slide 302, the inner side of the rotating slide 302 is fixedly connected with a mounting ring 338, the other end of the outer side of the mounting ring 338 is provided with a gear ring 337, the inner side of the mounting ring 338 is fixedly connected to the first motor 303, the output end of the first motor 303 is fixedly connected with a threaded rod 304, the outer side of the mounting ring 338 is provided with a mounting frame 306, the inner side of the mounting frame 306 is provided with a bolt 305, the bolt 305 is threadedly connected to the threaded rod 304, the outer side of the mounting frame 306 is fixedly connected to the cutting machine 307, the bottom of the mounting frame 306 is provided with a welding frame 313, the welding frame 313 is connected to the mounting frame The mounting frame 306 is fixedly connected, an electric slide bar 339 is installed on the inner side of the welding frame 313, a displacement controller 314 is slidably connected to the outer side of the welding frame 313, the electric slide bar 339 is threadedly connected to the displacement controller 314, an argon arc welding head 315 is installed on the outer side of the displacement sensor, an arc pressure sensor 316 is installed on the bottom of the displacement controller 314, an arc pressure controller 317 is installed on the outer side of the argon arc welding head 315, a filter probe 318 is installed on the other end of the arc pressure controller 317, an automatic welding wire ball 312 is installed on the top of the welding frame 313, and a lifting platform 319 is installed on the top of the base 1.

[0035] The effect achieved by the entire embodiment 1 is as follows: the two sections of bimetallic composite pipe to be welded are sequentially passed through the mounting ring 338 and placed inside it. In order to solve the problems that are prone to occur in conventional welding of bimetallic composite pipes and to improve the welding quality, the interface of the two sections of pipe is first placed inside the four cutters 307, and the first motor 303 is started to drive the threaded rod 304 to rotate. Based on the principle of thread transmission, the threaded rod 304 drives the bolt 305 to move, thereby causing the mounting frame 306 installed on the bolt 305 to move synchronously, and the cutter 307 is accurately adjusted to the appropriate position. Then, the cutter 307 is turned on and the third motor 335 is started at the same time to drive the gear 336 to rotate. The gear 336 and the gear ring 337 are engaged with each other, so that the mounting frame 306 and the cutter 307 rotate in a circle to cut the pipe. The four cutters 307 work together to improve the cutting efficiency while ensuring the precise docking of the incision, avoid cutting deviation, and reduce material loss and time cost. During the cutting process, the ultrasonic generator 333 continuously detects the inside of the pipe and transmits and receives signals through The device 334 receives feedback information in real time to monitor the progress of cutting the outer layer of the pipe and prevent the inner layer of the pipe from being damaged. After the outer layer is cut, the waste part is peeled off and the first motor 303 is started again to move the cutting machine 307 to the inside of another section of the pipe to cut and peel off the inner layer to ensure that the inner and outer layers of the two sections of the pipe are the same length. Then, the two sections of the pipe are connected to each other. At this time, two splicing points will be formed, and the splicing points of the inner and outer layers are staggered. The electric telescopic rod 327 is started to push the protective tube plug 328 from the inside of the pipe to At the inner layer joint, the electronic slider 330 is started at the same time to drive the movable frame 331 to move. The movable frame 331 is connected to the cleaning brush 332 through a rotating rod. The bottom of the cleaning brush 332 rotates in conjunction with the brush groove, so that the cleaning brush 332 swings left and right during the movement to fully clean the welding part. When the protective cylinder plug 328 detects that the humidity inside the pipeline exceeds the standard, it will release hot air through the air outlet 329 to reduce the humidity. Moreover, the protective cylinder plug 328 and the cleaning brush 332 work together to effectively prevent external air from entering the interior of the pipeline.

[0036] Example 2, as Figure 5-Figure 7As shown, the top of the lifting platform 319 is provided with a plurality of rotating wheel rims 320, the inner sides of the plurality of rotating wheel rims 320 are provided with anti-slip wheels 321, the inner sides of the plurality of rotating wheel rims 320 are rotatably connected to the spring telescopic rod 322, the other end of the spring telescopic rod 322 is rotatably connected to the fixed central axis 323, the inner side of the fixed central axis 323 is provided with a mounting shaft 324, the inner middle part of the mounting shaft 324 is fixedly connected to the second welding machine mechanism 325, and the other end of the mounting shaft 324 is provided with a second The motor 326 and the second motor 326 are fixedly connected to the fixed central shaft 323 on the other side. A plurality of wheel grooves are provided on the inner side of the rotating wheel rim 320. A plurality of anti-skid wheels 321 are sequentially arranged on the inner side of the wheel grooves. The wheel body of the anti-skid wheel 321 is a shock-absorbing wheel. An electric telescopic rod 327 is provided on the inner side of the other end of the base 1. The outer side of the electric telescopic rod 327 is fixedly connected to the protective cylinder plug 328. The outer side of the protective cylinder plug 328 is provided with an air blowing port 329. The inner side of the protective cylinder plug 328 is provided with a The brush groove has an electronic slide bar 330 fixedly connected to its inner wall, a sliding block 309 is rotatably connected to the top of the threaded rod 304, a protective sleeve 308 is slidably connected to the outer side of the sliding block 309, a plurality of scale lines 311 are fixedly connected to the outer side of the protective sleeve 308, a plurality of block slideways 310 are provided on the outer side of the protective sleeve 308, a mobile frame 331 is installed on the outer side of the electronic slide bar 330, and a plurality of cleaning brushes 332 are rotatably connected to the inner side of the mobile frame 331. The bottom of the cleaning brush 332 is rotatably connected to a rotating rod, which is rotatably connected to the inner side of the brush groove, and is rotatably connected to the movable frame 331. An ultrasonic generator 333 is provided on the top of the base 1, and the ultrasonic generator 333 is fixedly connected to the fixed plate 2. A signal transceiver 334 is installed on the top of the base 1, and a third motor 335 is installed on the other side of the top of the base 1. The output end of the third motor 335 is fixedly connected to a gear 336, and the gear 336 is engaged with the ring gear 337.

[0037] The effect achieved by the entire embodiment 2 is as follows: the anti-skid wheel 321 is started to drive the rotating wheel 320 to smoothly enter the interior of the pipeline until the second welding machine mechanism 325 accurately reaches the splicing of the inner layer of the pipeline. At this time, the filter probe 318 on the second welding mechanism 3 starts to capture the picture and transmit data in real time, and at the same time, the electric slide bar 339 is started to align the welding head with the welding part. Subsequently, the welding machine mechanism is started and welding of the inner layer of the pipeline is started. During the welding process, the second motor 326 drives the entire welding machine mechanism to rotate at a constant speed to ensure that the inner layer interface of the pipeline is evenly and firmly welded. During the connection, the filter probe 318 continues to work, monitoring the welding status and quality in real time. The arc pressure sensor 316 runs synchronously, detecting the welding arc voltage in real time, and automatically adjusts the position of the welding head through the arc pressure controller 317 with the help of the displacement controller 314 to ensure that the arc pressure is always maintained in a standard stable state. After the welding of the inner layer joint of the pipeline is completed, the third motor 335 is started to drive the gear ring 337 to rotate, and then drive the argon arc welding head 315 on the mounting ring 338 and the entire welding machine mechanism to rotate along the outer layer of the pipeline. Referring to the inner layer welding process, welding operations are performed on the outer layer joint of the pipeline.

[0038] The working principle of the whole equipment is as follows: first, the two sections of pipes to be welded are passed through in sequence and placed in the mounting ring 338. In order to deal with the negative effects of common welding of bimetallic composite pipes and to improve the welding quality, the interface of the two sections of pipes to be welded is first placed inside the four cutters 307. The first motor 303 is started to drive the threaded rod 304, so that the threaded rod 304 drives the bolt 305 to move according to the thread principle. Therefore, the mounting bracket 306 installed on the bolt 305 moves synchronously with the bolt 305 until the cutter 307 is moved to the corresponding position, and then the first motor 303 is started to drive the threaded rod 304. The cutting machine 307 cuts the pipe to be welded, and the third motor 335 is started to drive the gear 336 to rotate, and the mounting frame 306 and the cutting machine 307 thereon are rotated together through the gear 336 and the ring gear 337 to perform annular cutting on the pipe. The four cutting machines 307 can make the cutting speed faster and the cuts more accurately docked, reducing the material and time costs caused by the cutting deviation. At the same time, the ultrasonic generator 333 is started to detect the inside of the pipe being cut, and the feedback information is received through the signal transceiver 334, and the pipe is cut in real time. Monitor whether the cutting machine 307 has completed the cutting work of the outer layer of the pipe and prevent accidental damage to the inner layer of the pipe. When the cutting is completed, peel off the outer layer of this section of the pipe that has been cut, and then continue to start the first motor 303 to adjust the cutting machine 307 to the inner side of the other section of the pipe, cut and peel off the inner layer of the other section of the pipe, so that the length of the inner layer peeled off of this section is consistent with the length of the outer layer peeled off of the other section, and then dock the two sections of pipe. At this time, there are two splicing points on the two sections of pipe, and the outer layer splicing point is staggered with the inner layer splicing point, and start the electric telescopic rod 327 to drive the protective tube plug 328 from the pipe. The cleaning brush 332 is moved to the inner layer joint by activating the electronic slider 330. The cleaning brush 332 is rotated with the movable frame 331, the rotating rod and the cleaning brush 332, and the bottom of the cleaning brush 332 and the brush groove rotate. Therefore, the cleaning brush 332 swings left and right while the movable frame 331 moves, thereby cleaning the welding joint. When the protective cylinder plug 328 detects that the humidity around the pipe is high, hot air is blown out through the air outlet 329 to reduce the humidity. When the protective cylinder plug 328 is inside the pipe, its own volume and the cleaning brush 332 together block most of the air from entering the pipe.

[0039] At this time, the corresponding welding mechanism is selected and adjusted according to the material and specifications of the pipeline, and the anti-slip wheel 321 is started to drive the rotating wheel rim 320 to move into the pipeline until the second welding mechanism 325 on it reaches the internal joint of the pipeline. The spring telescopic rod 322 stabilizes the rotating wheel rim 320, and the self-extensible nature of the spring telescopic rod 322 allows the rotating wheel rim 320 to move and stretch within a certain range, which is suitable for pipelines of various specifications. At this time, the filter probe 318 on the second welding mechanism 3 is used to capture and transmit the image in real time, and the electric slide bar 339 is started to align the welding head on it with the desired welding position, thereby starting the welding mechanism to weld the inside of the pipeline, and at the same time the second motor 326 is started to The entire welding machine mechanism is driven to rotate to achieve the effect of welding the inner interface of the pipeline. During the welding process, the filter probe 318 is continuously turned on to observe and analyze the welding situation and quality in real time, and the arc pressure is synchronously detected by the arc pressure sensor 316. The arc pressure controller 317 is used to transmit information, and the position of the welding head is adjusted by the displacement controller 314 to keep the arc pressure standard and stable. When the welding of the inner pipe joint is completed, the third motor 335 is started again to drive the gear ring 337 to rotate, thereby driving the argon arc welding head 315 on the mounting ring 338 and its entire welding machine mechanism to rotate on the outside of the pipeline, and the outer joint of the pipeline is welded according to the principle of welding the inner pipeline, thereby completing the final welding work.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bimetallic composite pipe end welding device, characterized by: It comprises a base (1), a fixing plate (2) and a welding mechanism (3), wherein the fixing plate (2) is arranged on the top of the base (1), and the welding mechanism (3) is arranged on the inner side of the fixing plate (2); The welding mechanism (3) comprises a first motor (303), a cutting machine (307), a spring telescopic rod (322), a second welding machine mechanism (325) and a protective tube plug (328). The first motor (303) is used to drive the cutting machine (307) to adjust its position according to the actual size of the pipe to be welded. After the plurality of cutting machines (307) have completed cutting the outer layer of a section of double-layer pipe, they are again driven by the first motor (303) to adjust their positions to the inside of another section of double-layer pipe, and then cut the inner layer of the other section of double-layer pipe. When cutting the two sections of double-layer pipe, the cutting blade on the cutting machine (307) is used to grind the cut of the double-layer pipe. Finally, the second welding machine mechanism (325) is used to weld the two sections of double-layer pipe first to perform primer treatment. At the same time, the air humidity, temperature and protective gas inside the pipe are controlled by the protective tube plug (328).

2. The bimetallic composite pipe end welding device according to claim 1, characterized in that: The welding mechanism (3) further comprises a rotating frame (301), wherein the rotating frame (301) is arranged on the inner side of the fixed plate (2), the inner side of the rotating frame (301) is rotatably connected to a rotating slide rail (302), the inner side of the rotating slide rail (302) is fixedly connected to a mounting ring (338), the other end of the outer side of the mounting ring (338) is provided with a gear ring (337), the inner side of the mounting ring (338) is fixedly connected to the first motor (303), the output end of the first motor (303) is fixedly connected to a threaded rod (304), the outer side of the mounting ring (338) is provided with a mounting frame (306), the inner side of the mounting frame (306) is provided with a bolt (305), the bolt (305) is threadedly connected to the threaded rod (304), and the outer side of the mounting frame (306) is fixedly connected to the cutting machine (307).

3. The bimetallic composite pipe end welding device according to claim 2, characterized in that: A welding frame (313) is provided at the bottom of the mounting frame (306), the welding frame (313) is fixedly connected to the mounting frame (306), an electric slide bar (339) is installed on the inner side of the welding frame (313), a displacement controller (314) is slidably connected to the outer side of the welding frame (313), and the electric slide bar (339) is threadedly connected to the displacement controller (314).

4. The bimetallic composite pipe end welding device according to claim 3, characterized in that: An argon arc welding head (315) is installed on the outside of the displacement sensor, an arc pressure sensor (316) is installed on the bottom of the displacement controller (314), an arc pressure controller (317) is installed on the outside of the argon arc welding head (315), and a filter probe (318) is installed on the other end of the arc pressure controller (317). An automatic welding wire group (312) is installed on the top of the welding frame (313), and a lifting platform (319) is installed on the top of the base (1).

5. The bimetallic composite pipe end welding device according to claim 4, characterized in that: A plurality of rotating rims (320) are provided on the top of the lifting platform (319), and anti-slip wheels (321) are installed on the inner sides of the plurality of rotating rims (320). The inner sides of the plurality of rotating rims (320) are rotatably connected to a spring telescopic rod (322), and the other end of the spring telescopic rod (322) is rotatably connected to a fixed central axis (323).

6. The bimetallic composite pipe end welding device according to claim 5, characterized in that: A mounting shaft (324) is installed on the inner side of the fixed central shaft (323), and the inner middle part of the mounting shaft (324) is fixedly connected to the second welding machine mechanism (325). A second motor (326) is installed on the other end of the mounting shaft (324), and the second motor (326) is fixedly connected to the fixed central shaft (323) on the other side. A plurality of wheel grooves are opened on the inner side of the rotating wheel rim (320), and a plurality of anti-slip wheels (321) are sequentially installed on the inner side of the wheel grooves. The wheel body of the anti-slip wheel (321) is a shock-absorbing wheel.

7. The bimetallic composite pipe end welding device according to claim 6, characterized in that: An electric telescopic rod (327) is installed on the inner side of the other end of the base (1), the outer side of the electric telescopic rod (327) is fixedly connected to the protective tube plug (328), the outer side of the protective tube plug (328) is provided with an air blowing port (329), the inner side of the protective tube plug (328) is provided with a brush groove, the inner wall of the brush groove is fixedly connected to an electronic sliding rod (330), the top of the threaded rod (304) is rotatably connected to a sliding block (309), the outer side of the sliding block (309) is slidably connected to a protective sleeve (308), the outer side of the protective sleeve (308) is fixedly connected to a plurality of scale lines (311), and the outer side of the protective sleeve (308) is provided with a plurality of block slideways (310).

8. The bimetallic composite pipe end welding device according to claim 7, characterized in that: A movable frame (331) is installed on the outer side of the electronic slide bar (330), and a plurality of cleaning brushes (332) are rotatably connected to the inner side of the movable frame (331). The bottom of the cleaning brush (332) is rotatably connected to a rotating rod, and the rotating rod is rotatably connected to the inner side of the brush groove.

9. The bimetallic composite pipe end welding device according to claim 8, characterized in that: The rotating rod is rotatably connected to the movable frame (331); an ultrasonic generator (333) is provided on the top of the base (1); the ultrasonic generator (333) is fixedly connected to the fixed plate (2); a signal transceiver (334) is installed on the top of the base (1); a third motor (335) is installed on the other side of the top of the base (1); an output end of the third motor (335) is fixedly connected to a gear (336); and the gear (336) is meshed with a gear ring (337).

10. A method for using a bimetallic composite pipe end welding device, characterized in that: According to the bimetallic composite pipe end welding device of claim 9, The following steps are involved: S1: First, each cutting machine (307) is adjusted to a corresponding position by the first motor (303), and then cutting and adjusting the welding part of the pipe to be welded is performed; S2: Start the anti-slip wheel (321) to bring the second welding machine mechanism (325) into the inner side of the required welding pipe, and perform bottom welding on the inner side of the pipe; S3: The threaded relationship between the threaded rod (304) and the bolt (305), and the rotational relationship between the rotating wheel (320) and the spring telescopic rod (322) increase the applicability of the device, and can be equipped with different welding equipment and cutting equipment; S4: Finally, the humidity and oxygen inside the pipe to be welded are controlled through the protective tube plug (328).

Images