Pressure vessel tank welding system and method

Abstract

The present invention relates to the technical field of container welding, and specifically to a pressure vessel tank welding system and method, comprising a frame and a welding gun body arranged thereon, the system also comprising a shifting mechanism for timely recycling excess flux, and a finishing mechanism for compacting the flux in the weld, the present invention adopts a rotating part to drive a scraper to slide the excess flux that is not involved in welding at the rear of the welding gun body onto a pedestal, and then the scraper can move the flux to the front of the welding gun body along the pedestal, so that the excess flux that is not involved in welding falls onto the weld again, realizing the recovery and reuse of the excess flux, significantly reducing flux waste, and reducing cleaning costs, the present invention adopts a rotating part to drive a movable plate to move along the track of a track guide rod, so that the movable plate can accurately move and press down the flux through a comb rod, ensuring that the flux evenly fills the weld and improves the density of the weld.

Description

Technical Field

[0001] The present invention relates to the technical field of container welding, and in particular to a pressure vessel tank welding system and method. Background Art

[0002] In the manufacturing process of pressure vessel tanks, circumferential seam welding is one of the key processes to ensure the sealing and structural strength of the tank body. Submerged arc welding technology is widely used in circumferential seam welding of pressure vessel tanks due to its high deposition efficiency, good weld quality and automation potential.

[0003] Submerged arc welding technology requires spreading flux in the welding area to protect the molten pool, prevent oxidation and stabilize the arc. In addition, to ensure the penetration and forming quality of the weld, the circumferential seam of the tank body usually needs to be grooved before welding, such as using a V-shaped or U-shaped groove design to optimize the penetration and filling effect during the welding process.

[0004] However, the existing submerged arc welding integrated welding equipment still has significant shortcomings in practical applications. First, it is difficult for traditional equipment to recover and reuse the excess flux on the weld that is not involved in welding in real time during the welding process, resulting in a large amount of flux scattered and wasted, reducing the utilization efficiency of the flux and increasing the subsequent cleaning costs.

[0005] Secondly, the problem of insufficient weld filling is more prominent. Due to the lack of a dynamic compaction mechanism, the uniform distribution of the flux in the weld is difficult to ensure, and local looseness or gaps are prone to occur, which in turn affects the density of the weld and even causes defects such as porosity and unfusion.

[0006] The above problems not only reduce welding efficiency, but may also pose hidden dangers to the safety performance of pressure vessels, and urgently need to be improved through structural innovation. Summary of the Invention

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a pressure vessel tank welding system and method, including a frame and a welding gun body arranged thereon, the system also includes a moving mechanism for timely recycling excess flux, and a finishing mechanism for compacting the flux in the weld.

[0008] The shifting mechanism includes a base fixedly mounted on the lower end of the outer side of the welding gun body, and a rotating member is provided on the middle part of the outer side of the welding gun body. The continuously rotating rotating member drives a number of scrapers arranged on it to slide up and down to scrape the flux at the rear of the welding gun body onto the base, and then the scrapers scrape the flux along the base to the front of the welding gun body.

[0009] The finishing mechanism includes several movable plates that slide up and down on the rotating part. Several comb rods for compacting the flux inside the weld are equidistantly arranged on the lower part of the movable plates. A track guide rod is fixedly installed on the upper end of the outer side of the welding gun body.

[0010] The continuously rotating rotating part drives the comb rod to move along the track of the track guide rod through the moving plate. When the comb rod moves to the top of the weld in front of the welding gun body, the comb rod presses the flux downward until it fully fills the weld.

[0011] Preferably, the pedestal is divided into two areas, an inner area and an outer area. The inner area of the pedestal is a circular plate structure, and a fan-shaped through groove is opened at the front of the inner area of the pedestal. A spiral loading slope is set at the left rear of the outer area of the pedestal, and a spiral unloading slope is symmetrically set at the front of the outer area of the pedestal.

[0012] Preferably, a fixed filter plate for passively filtering the flux is fixedly installed on the base and located just above the left unloading inclined surface, and a movable filter plate for actively filtering the flux is rotatably provided on the base and located just above the right unloading inclined surface.

[0013] Preferably, the upper part of the track guide rod is an annular round rod structure, the front part of the track guide rod and above the corresponding fan-shaped groove is a spiral round rod structure connected to the right end of the annular round rod structure, and the left end of the spiral round rod structure is an arc section extending to the bottom of the annular round rod structure.

[0014] Preferably, two symmetrically arranged L-shaped plates are provided at the lower end of the front side of the pedestal for sliding left and right. The lower side of the vertical section of the L-shaped plate is an arc-shaped structure. The two L-shaped plates are fixedly connected together by a support plate. Several crushing nails are fixedly installed on the side where the vertical sections of the two L-shaped plates are close to each other.

[0015] Preferably, a transmission shaft is rotatably provided on the right side of the pedestal, a crank plate is fixedly installed on the lower end of the transmission shaft, and the eccentric position of the crank plate is hinged to the movable filter plate and the L-shaped plate on the right through two connecting plates.

[0016] Preferably, an adjustment block is provided on the side of the movable plate away from the axis of the pedestal for sliding up and down, a tension spring is provided between the corresponding positions of the adjustment block and the rotating member, and an adjustment screw threadedly connected to the corresponding adjustment block is rotatably provided on the movable plate.

[0017] Preferably, a push spring is provided between the comb tooth rod and the corresponding movable plate, and clamps for clamping the comb tooth rod are slidingly provided on both sides of the movable plate along its thickness, and a locking screw threadedly connected to the other clamp is rotatably provided on one of the clamps on the same movable plate.

[0018] Preferably, a fixed plate is fixedly mounted on the upper end of the outer side of the welding gun body, an annular plate is rotatably provided on the lower side of the fixed plate, and the lower side of the annular plate is connected to each scraper through a spring telescopic rod.

[0019] Preferably, the present invention also provides a pressure vessel tank welding method, and the specific welding method steps are as follows: S1, place the pressure vessel at a corresponding position on the frame, and adjust the frame to drive the welding gun body to the position corresponding to the weld.

[0020] S2. Start the welding gun body to deliver flux to the weld, perform submerged arc welding on the weld, and continue to rotate the pressure tank.

[0021] S3. Rotate the rotating member so that the rotating member drives the scraper to scrape the flux at the rear of the welding gun body to the weld at the front of the welding gun body.

[0022] S4. The rotating part drives the comb rod to move to the top of the weld seam in front of the welding gun body, and then the comb rod presses the flux downward until it fully fills the weld seam.

[0023] S5. The welding gun body continues to weld the weld until the pressure tank rotates one circle, thereby completing the welding.

[0024] The beneficial effects of the present invention are: 1. The present invention uses a rotating part to drive the scraper to slide the excess flux that is not involved in welding at the rear of the welding gun body to the base, and then the scraper can move the welding to the front of the welding gun body along the base, so that the excess flux that is not involved in welding falls onto the weld again, realizing the recovery and reuse of the excess flux, significantly reducing flux waste, and reducing cleaning costs.

[0025] 2. The present invention adopts a rotating part to drive the movable plate to move along the track of the track guide rod, so that when the movable plate moves to the top of the weld in front of the welding gun body, the comb rod can be used to accurately move and press down the flux, ensuring that the flux evenly fills the weld, avoiding air holes and unfused defects, and improving the density of the weld. At the same time, the position of the comb rod can be adjusted in advance in combination with the push spring and the clamping plate, so that the comb rod can adapt to the welds of pressure tanks with different diameters.

[0026] 3. The present invention adopts a fixed filter plate and a movable filter plate to filter the reused flux passively and actively respectively, further improving the screening level of the reused welding, thereby ensuring the utilization rate of the welding, and the reciprocating L-shaped plate can also lay the flux layer by layer on the weld, thereby not relying on the fluidity of the flux itself, so that the flux fills the weld, further increasing the density of the weld, and at the same time, the crushing nails on the L-shaped plate can also impact the flux, further preventing the agglomerated flux from filling the weld.

[0027] 4. The present invention uses a comb rod combination on the same movable plate to form a comb structure to compact the flux inside the weld, which can push the excess flux to the gap position between the two comb rods to prevent the flux height from being different at different places inside the weld. By moving the position of the adjustment block, the pre-stretching degree of the tension spring can also be adjusted, thereby applying different compaction forces to the flux, thereby meeting different welding requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings and examples.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention when welding a pressure tank.

[0030] Figure 2 It is a schematic diagram of the local structure of the present invention when welding the pressure tank.

[0031] Figure 3 It is a schematic diagram of the local structure of the present invention after the frame is removed.

[0032] Figure 4 It is a partial structural diagram of the welding gun body, base and scraper in the present invention.

[0033] Figure 5 It is a structural schematic diagram of the pedestal in the present invention.

[0034] Figure 6 It is a partial structural diagram of the pedestal, welding gun body, rotating part and movable plate in the present invention.

[0035] Figure 7 It is a partial cross-sectional view of the rotating part, the moving plate, the comb rod and the clamping plate in the present invention.

[0036] Figure 8 It is a structural schematic diagram of the L-shaped plate and the crushing nails in the present invention.

[0037] In the figure: 1. frame; 2. welding gun body; 3. shifting mechanism; 4. arranging mechanism; 31. pedestal; 32. rotating part; 33. scraper; 41. movable plate; 42. comb rod; 43. track guide rod; 44. fixed plate; 311. fixed filter plate; 312. movable filter plate; 313. L-shaped plate; 314. crushing nail; 315. transmission shaft; 316. crank plate; 317. connecting plate; 411. adjusting block; 412. adjusting screw; 413. clamping plate; 414. locking screw; 441. annular plate; 442. spring telescopic rod. DETAILED DESCRIPTION

[0038] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0039] See Figure 1 and Figure 2 A pressure vessel tank welding system includes a frame 1 and a welding gun body 2 arranged thereon. The system also includes a moving mechanism 3 for timely recycling excess flux and a sorting mechanism 4 for compacting the flux in the weld.

[0040] When it is necessary to perform girth welding on the pressure vessel body, the pressure vessel is first placed on the left side of the frame 1, and then the frame 1 is adjusted to drive the welding gun body 2 to move to the top of the weld. At the same time, the welding gun body 2 and the frame 1 drive the shifting mechanism 3 and the arranging mechanism 4 to move to the position of the weld. Then, the welding gun body 2 is started, and the pressure vessel is rotated at the same time, so that the welding gun body 2 spreads the flux into the weld and the flux covers the arc, thereby continuously performing submerged arc welding on the welding position of the pressure vessel.

[0041] At the same time, the shifting mechanism 3 continuously transfers the excess flux that is not involved in welding at the rear of the welding gun body 2 to the weld at the front of the welding gun body 2, thereby making full use of the flux. Subsequently, the sorting mechanism 4 compacts the flux in the weld at the front of the welding gun body 2, so that the flux is fully filled in the weld to ensure welding quality.

[0042] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The shifting mechanism 3 includes a base 31 fixedly mounted on the lower end of the outer side of the welding gun body 2. A rotating member 32 is rotatably sleeved on the middle part of the outer side of the welding gun body 2. The continuously rotating rotating member 32 drives a number of scrapers 33 arranged on it to slide up and down to scrape the flux at the rear of the welding gun body 2 onto the base 31. Then the scrapers 33 scrape the flux along the base 31 to the front of the welding gun body 2.

[0043] See Figure 1 、 Figure 2 and Figure 6 The finishing mechanism 4 includes a number of movable plates 41 that are slid up and down on the rotating member 32. A number of comb rods 42 for compacting the flux inside the weld are equidistantly arranged on the lower part of the movable plate 41 and slide up and down. A track guide rod 43 is fixedly installed on the upper end of the outer side of the welding gun body 2. The continuously rotating rotating member 32 drives the comb rod 42 to move along the track of the track guide rod 43 through the movable plate 41. When the comb rod 42 moves to the top of the weld at the front of the welding gun body 2, the comb rod 42 presses the flux downward until it fully fills the weld.

[0044] See Figure 6 and Figure 7 A push spring is provided between the comb rod 42 and the corresponding movable plate 41. Clamps 413 for clamping the comb rod 42 are slidingly provided on both sides of the movable plate 41 along its thickness. A locking screw 414 threadedly connected to the other clamp 413 is rotatably provided on one of the clamps 413 on the same movable plate 41.

[0045] When it is necessary to perform circumferential seam welding on the pressure vessel body, the operator manually rotates the rotating part 32 so that the rotating part 32 drives the comb rod 42 thereon to move to the front of the welding gun body 2 through the moving plate 41, and then manually moves the moving plate 41 downward so that the lower ends of the comb rods 42 thereon driven by the moving plate 41 are all against the weld, and at the same time, the weld pushes the comb rod 42 upward through the reaction force on the comb rod 42 and compresses the push spring at the corresponding position.

[0046] The operator then manually turns the locking screw 414 so that the locking screw 414 drives the two clamps 413 at the corresponding positions to move closer to each other, so that the two clamps 413 at the corresponding positions clamp all the comb rods 42 of the same movable plate 41 and fix them on the movable plate 41, so that the comb rods 42 on the movable plate 41 can compact the flux on the welds of pressure tanks with different diameters with the same force.

[0047] It should be noted that the thickness of the comb rod 42 is slightly greater than the thickness of the movable plate 41 , so that the two clamping plates 413 can clamp the comb rod 42 .

[0048] See Figure 4 and Figure 5 The pedestal 31 is divided into two areas, the inner area of the pedestal 31 is a circular plate structure, and a fan-shaped through groove is opened at the front of the inner area of the pedestal 31. A spiral feeding slope is set at the left rear of the outer area of the pedestal 31, and a spiral unloading slope is symmetrically set at the front of the outer area of the pedestal 31.

[0049] See Figure 3 and Figure 4 A fixed plate 44 is fixedly installed on the upper end of the outer side of the welding gun body 2, and an annular plate 441 is rotatably provided on the lower side of the fixed plate 44. The lower side of the annular plate 441 is connected to each scraper 33 through a spring telescopic rod 442.

[0050] In this embodiment, a servo motor is fixedly mounted on the frame 1 , and an output shaft of the servo motor is connected to the rotating member 32 via a belt.

[0051] When the welding gun body 2 starts to weld the pressure tank, the servo motor is started to drive the rotating part 32 to start rotating, so that the rotating part 32 drives all the scrapers 33 to rotate synchronously, and the scraper 33 drives the annular plate 441 to rotate through the spring telescopic rod 442. When the scraper 33 rotates to the rear of the welding gun body 2, the scraper 33 scrapes the excess flux on the upper part of the weld that is not involved in the welding to the feeding slope of the base 31, and then the scraper 33 pushes the excess flux forward along the feeding slope of the base 31.

[0052] See Figure 3 、 Figure 4 and Figure 5 A fixed filter plate 311 for passively filtering the flux is fixedly installed on the base 31 and located directly above the left unloading inclined surface. A movable filter plate 312 for actively filtering the flux is rotatably provided on the base 31 and located directly above the right unloading inclined surface.

[0053] When the scraper 33 pushes the excess flux forward along the loading slope of the pedestal 31 to the fixed filter plate 311, the loading slope pushes the scraper 33 at the corresponding position upward and compresses the spring telescopic rod 442 at the corresponding position, filtering the excess welding through the fixed filter plate 311, so that the flux with particle diameter that meets the requirements passes through the fixed filter plate 311 to the unloading slope on the left part of the pedestal 31, and then the excess flux filtered by the fixed filter plate 311 moves forward along the unloading slope on the left part of the pedestal 31 under the action of gravity to the front of the welding gun body 2, while the scraper 33 continues to push the excess flux to move on the fixed filter plate 311.

[0054] See Figure 3 and Figure 8 Two L-shaped plates 313 are symmetrically arranged at the lower end of the front side of the base 31 and slide left and right. The lower side of the vertical section of the L-shaped plate 313 is an arc structure. The two L-shaped plates 313 are fixedly connected together by a support plate. Several crushing nails 314 are fixedly installed on the side where the vertical sections of the two L-shaped plates 313 are close to each other.

[0055] See Figure 3 and Figure 4 A transmission shaft 315 is rotatably provided on the right side of the pedestal 31, and a crank disk 316 is fixedly installed on the lower end of the transmission shaft 315. The eccentric position of the crank disk 316 is hinged to the movable filter plate 312 and the right L-shaped plate 313 through two connecting plates 317.

[0056] In this embodiment, the rotating member 32 is connected to the transmission shaft 315 via a belt.

[0057] When the rotating part 32 starts to rotate, the rotating part 32 drives the crank plate 316 to rotate through the transmission shaft 315, and the crank plate 316 drives the movable filter plate 312 to rotate back and forth on the base 31 through the connecting plate 317 at the corresponding position. When the scraper 33 pushes the excess flux from the fixed filter plate 311 to the movable filter plate 312, the movable filter plate 312 actively filters the excess flux by shaking back and forth, so that the agglomerated flux and the flux with larger particle diameter in the excess flux float up, so that the flux with particle diameter that meets the requirements passes through the movable filter plate 312 to the unloading slope on the right part of the base 31, and then the flux moves along the unloading slope on the right part of the base 31 under the action of gravity to the front of the welding gun body 2.

[0058] When the crank disk 316 rotates, the L-shaped plate 313 at the corresponding position is driven to move back and forth left and right through the connecting plate 317 at the corresponding position. Since the two L-shaped plates 313 are fixed together by the support plate, the two L-shaped plates 313 swing left and right synchronously. When the flux slides from the unloading slope to the front of the welding gun body 2, the flux is located on the upper part of the L-shaped plate 313, which makes the flux fall into the inside of the weld through the gap between the vertical sections of the two L-shaped plates 313.

[0059] The two reciprocating L-shaped plates 313 can push the falling flux back and forth, thereby reciprocatingly changing the position of the flux falling in the weld, and then laying the flux layer by layer in the weld, increasing the filling tightness of the weld by the flux, and preventing the weld from being filled solely by the fluidity of the flux. When the flux falls between the vertical sections of the two L-shaped plates 313, the L-shaped plates 313 can also impact and crush the welding particles through the crushing pins 314 thereon, thereby further ensuring the refinement of the flux and the welding quality.

[0060] Then the scraper 33 continues to push the excess flux that has not passed the screening of the fixed filter plate 311 and the movable filter plate 312, so that the excess flux that has not passed the screening moves to the rear of the movable filter plate 312, and then the excess flux that has not passed the screening falls to the outside of the base 31 under the action of gravity, and falls to the outer wall of the pressure tank. As the pressure tank rotates, it slides off the pressure tank under the action of gravity, and then the spring telescopic rod 442 drives the scraper 33 downward to the initial position under the push of its own elastic force.

[0061] In this embodiment, filtering and screening the excess flux at both the movable filter plate 312 and the fixed filter plate 311 can not only ensure the utilization rate of the flux, but also prevent the flux from gathering together and falling onto the weld. By rocking the horizontal section of the L-shaped plate 313 back and forth left and right, it can be further ensured that the flux falls evenly and continuously into the weld.

[0062] See Figure 2 and Figure 6The upper part of the track guide rod 43 is an annular round rod structure, the front part of the track guide rod 43 and the upper part corresponding to the fan-shaped through groove are spiral round rod structures connected to the right end of the annular round rod structure, and the left end of the spiral round rod structure is an arc section extending to the bottom of the annular round rod structure.

[0063] See Figure 6 and Figure 7 An adjusting block 411 is provided on the side of the movable plate 41 away from the axis of the base 31 for sliding up and down. A tension spring is provided between the corresponding position of the adjusting block 411 and the rotating member 32. An adjusting screw 412 is rotatably provided on the movable plate 41 and is threadedly connected to the corresponding adjusting block 411.

[0064] In this embodiment, a rolling roller is rotatably provided on one side of the upper end of the movable plate 41 close to the axis of the pedestal 31 , and the rolling roller abuts against the upper portion of the track guide rod 43 .

[0065] When the rotating member 32 rotates, the rotating member 32 drives all the moving plates 41 to rotate synchronously, so that all the moving plates 41 move along the track of the track guide rod 43 through the rolling roller. When the moving plate 41 rotates forward, the moving plate 41 drives the rolling roller thereon to be located on the left part of the annular round rod structure of the track guide rod 43, and at the same time stretches the tension spring at the corresponding position.

[0066] When the movable plate 41 rotates to the point directly above the weld at the front of the welding gun body 2, the movable plate 41 drives the rolling roller thereon to move to above the arc section at the left end of the spiral round rod structure of the track guide rod 43. At this time, the annular round rod structure of the track guide rod 43 no longer blocks the rolling roller, so that the tension spring pulls the movable plate 41 downward by its own elastic force, so that the movable plate 41 drives the comb rod 42 thereon to be inserted into the weld, thereby compacting the flux inside the weld by the comb rod 42.

[0067] The comb rods 42 on the same movable plate 41 are combined into a comb structure to compact the flux inside the weld, so that excess flux can be pushed to the gap between the two comb rods 42 to prevent the flux height at different locations inside the weld from being different.

[0068] The rotating member 32 then drives the moving plate 41 to continue rotating, so that the moving plate 41 drives the rolling roller thereon to contact the spiral rod structure of the track guide rod 43, thereby causing the moving plate 41 to move upward along the spiral rod structure to the initial height position.

[0069] In this embodiment, the operator manually turns the adjusting screw 412 in advance, and the adjusting screw 412 can drive the adjusting block 411 to move up and down, thereby changing the initial height position of the adjusting block 411, and then changing the degree of pre-stretching of the tension spring. The adjusting tension spring pulls the comb rod 42 to press the flux through its own elastic force to adapt to different welding requirements.

[0070] See Figures 1 to 8 In addition, the present invention also provides a pressure vessel tank welding method, and the specific welding method steps are as follows: S1, place the pressure tank at the corresponding position of the frame 1, and adjust the frame 1 to drive the welding gun body 2 to the position corresponding to the weld.

[0071] S2. Start the welding gun body 2 and rotate the pressure tank at the same time, so that the welding gun body 2 spreads the flux into the weld and the flux covers the arc, thereby continuously performing submerged arc welding on the welding position of the pressure tank.

[0072] S3. Start the servo motor to drive the rotating part 32 to start rotating. The rotating part 32 drives the scraper 33 to scrape the excess flux that is not involved in welding on the upper part of the weld to the feeding slope of the base 31. The scraper 33 pushes the excess flux forward along the feeding slope of the base 31 to the fixed filter plate 311, and the excess welding is filtered through the fixed filter plate 311. At the same time, the scraper 33 continues to push the excess flux to move on the fixed filter plate 311. The crank plate 316 drives the movable filter plate 312 to swing back and forth to actively screen the excess flux, so that the flux with the particle diameter that meets the requirements moves along the unloading slope to the front of the welding gun body 2. The crank plate 316 drives the two L-shaped plates 313 to lay the flux layer by layer in the weld.

[0073] S4. When the rotating member 32 rotates, it drives the movable plate 41 to rotate synchronously. When the movable plate 41 rotates to the top of the weld at the front of the welding gun body 2, the tension spring pulls the movable plate 41 downward by its own elastic force, so that the movable plate 41 drives the comb rod 42 thereon to be inserted into the weld, thereby compacting the flux inside the weld through the comb rod 42.

[0074] S5. The welding gun body 2 continues welding the weld until the pressure tank rotates one circle, thereby completing the welding.

[0075] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the scope of protection of the present invention.

Claims

1. A pressure vessel body welding system, comprising a frame and a welding gun body arranged thereon, characterized in that: The system also includes a moving mechanism for timely recycling excess flux and a finishing mechanism for compacting the flux in the weld; The shifting mechanism includes a base fixedly mounted on the lower end of the outer side of the welding gun body, a rotating member is rotatably sleeved on the middle part of the outer side of the welding gun body, and the rotating member continuously rotates to drive a plurality of scrapers arranged on it to slide up and down to scrape the flux at the rear of the welding gun body onto the base, and then the scrapers scrape the flux along the base to the front of the welding gun body; The finishing mechanism includes a plurality of movable plates that slide up and down on a rotating member, a plurality of comb rods that slide up and down at equal intervals on the lower part of the movable plates for compacting the flux inside the weld, and a track guide rod fixedly mounted on the upper end of the outer side of the welding gun body; The continuously rotating rotating part drives the comb rod to move along the track of the track guide rod through the moving plate. When the comb rod moves to the top of the weld seam in front of the welding gun body, the comb rod presses the flux downward until it fully fills the weld seam. The pedestal is divided into two areas, the inner area of the pedestal is a circular plate structure, and a fan-shaped through groove is opened at the front of the inner area of the pedestal, a spiral feeding slope is set at the left rear of the outer area of the pedestal, and a spiral unloading slope is set symmetrically on the left and right of the front of the outer area of the pedestal; The upper part of the track guide rod is an annular round rod structure, the front part of the track guide rod and above the corresponding fan-shaped slot is a spiral round rod structure connected to the right end of the annular round rod structure, and the left end of the spiral round rod structure is an arc section extending to the bottom of the annular round rod structure.

2. A pressure vessel body welding system according to claim 1, characterized in that: A fixed filter plate for passively filtering the flux is fixedly installed on the base and located just above the left material discharge slope, and a movable filter plate for actively filtering the flux is rotatably arranged on the base and located just above the right material discharge slope.

3. A pressure vessel body welding system according to claim 2, characterized in that: The lower end of the front side of the pedestal is provided with two symmetrically arranged L-shaped plates for sliding left and right. The lower side of the vertical section of the L-shaped plate is an arc structure. The two L-shaped plates are fixedly connected together by a support plate. Several crushing nails are fixedly installed on the side where the vertical sections of the two L-shaped plates are close to each other.

4. A pressure vessel body welding system according to claim 3, characterized in that: A transmission shaft is rotatably provided on the right side of the pedestal, and a crank plate is fixedly installed on the lower end of the transmission shaft. The eccentric position of the crank plate is hinged to the movable filter plate and the L-shaped plate on the right through two connecting plates.

5. The pressure vessel body welding system according to claim 1, characterized in that: An adjusting block is provided on the side of the movable plate away from the axis of the pedestal for sliding up and down, a tension spring is provided between the corresponding positions of the adjusting block and the rotating member, and an adjusting screw is rotatably provided on the movable plate and is threadedly connected to the corresponding adjusting block.

6. A pressure vessel body welding system according to claim 1, characterized in that: A push spring is provided between the comb tooth rod and the corresponding movable plate. Clamps for clamping the comb tooth rod are slidingly provided on both sides of the movable plate along its thickness. A locking screw threadedly connected to the other clamp is rotatably provided on one of the clamps on the same movable plate.

7. A pressure vessel body welding system according to claim 1, characterized in that: A fixed plate is fixedly installed on the upper end of the outer side of the welding gun body, and an annular plate is rotatably provided on the lower side of the fixed plate. The lower side of the annular plate is connected to each scraper through a spring telescopic rod.

8. A pressure vessel body welding method, using the pressure vessel body welding system according to any one of claims 1 to 7, characterized in that: The specific welding method steps are as follows: S1. Place the pressure tank at the corresponding position of the frame, and adjust the frame to drive the welding gun body to the position corresponding to the weld; S2, start the welding gun body to deliver flux to the weld, perform submerged arc welding on the weld, and continuously rotate the pressure tank; S3. Rotate the rotating member so that the rotating member drives the scraper to scrape the flux at the rear of the welding gun body to the weld at the front of the welding gun body; S4. The rotating member drives the comb rod to move to the front of the welding gun body just above the weld, and then the comb rod presses the flux downward until it fully fills the weld; S5. The welding gun body continues to weld the weld until the pressure tank rotates one circle, thereby completing the welding.

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