Welding flux supporting system for ocean engineering steel pipe vertical joint submerged arc welding machine and welding process

Abstract

The invention relates to the technical field of ocean engineering steel pipe submerged-arc welding, and provides a welding flux supporting system for an ocean engineering steel pipe vertical joint submerged-arc welding machine and a welding technology.The flux supporting system comprises a bracket used for the outer side of a steel pipe and arranged in a sliding mode relative to the outer wall of the steel pipe, and the bracket is used for containing a welding gun for welding; the material supporting table is rotationally arranged relative to the bracket, is located below the welding gun and is used for supporting welding flux; the sliding seat is slidably arranged relative to the material supporting table and is close to or far away from the outer wall of the steel pipe after sliding; the first movable supporting plates are arranged relative to the material supporting table in a sliding mode and located below the material supporting table, and the first movable supporting plates abut against the outer wall of the steel pipe. One second movable supporting plate is arranged between any two adjacent first movable supporting plates, and the second movable supporting plates are hinged to the first movable supporting plates; by means of the technical scheme, the problem that in the prior art, when the steel pipes are welded in the vertical state, the universality of the material supporting table is poor for the steel pipes of different diameter models is solved.

Description

Technical Field

[0001] The invention relates to the technical field of submerged arc welding of marine engineering steel pipes, and in particular to a flux supporting system and a welding process for a submerged arc welding machine for vertically joining marine engineering steel pipes. Background Art

[0002] Offshore engineering steel pipes are steel pipes used in offshore engineering, which have the characteristics of large diameter, high strength and corrosion resistance.

[0003] Marine engineering steel pipes are transported over short distances. In actual use, multiple sections of steel pipes need to be welded. Submerged arc welding is generally used for welding because of its advantages of stable welding quality, high welding efficiency, no arc light and less smoke. Generally, several sections of steel pipes can be welded in a horizontal manner. The steel pipe is in a flat state as a whole. The welding area is welded by rotating the steel pipe while the welding gun does not move. However, as the number of steel pipe sections increases, the overall length of the steel pipe after welding will also increase. The space occupied by the length of the steel pipe itself is getting larger and larger. For the limited working space in marine engineering, it will reduce the working efficiency and increase the working cost.

[0004] Then someone proposed vertical welding, which can be referred to as vertical welding, in which the steel pipe is placed in a vertical state for welding. During welding, a corresponding support table is needed to support the flux to prevent the flux from falling off the area to be welded and ensure the welding effect. At the same time, since the steel pipe is basically circular and there are many differences in its diameter, it is necessary to prepare multiple models of support tables, resulting in a large number of equipment. When the outer surface of the steel pipe has concave-convex deformation or impurities, a gap is likely to appear between the support table with a relatively fixed shape and the outer wall of the steel pipe, causing the flux to leak, resulting in loss of raw materials and increased cost consumption. Therefore, it is necessary to improve and optimize the existing technology. Summary of the invention

[0005] The present invention provides a flux support system and welding process for a vertical submerged arc welding machine for marine engineering steel pipes, which solves the problem in the related art that when welding steel pipes in a vertical state, the support platform has poor universality for steel pipes of different diameters.

[0006] The technical solution of the present invention is as follows: The flux support system for submerged arc welding machine for vertical joint of offshore steel pipe includes: A bracket, which is used for the outside of the steel pipe and is slidably arranged relative to the outer wall of the steel pipe, and the bracket is used to place a welding gun for welding; A support platform is rotatably arranged relative to the bracket, is located below the welding gun, and is used to support the flux; A slide seat is slidably arranged relative to the supporting platform, and the slide seat moves closer to or away from the outer wall of the steel pipe after sliding; A plurality of movable support plates 1 are slidably arranged relative to the support platform and are located below the support platform, and the movable support plates 1 are in contact with the outer wall of the steel pipe; A movable support plate 2 is provided between any two adjacent movable support plates 1, and the movable support plate 2 is hinged to the movable support plate 1.

[0007] As a further technical solution, a sliding transmission unit is also included, and the sliding transmission unit includes: A primary transmission swing arm, rotatably disposed on the slide seat; A secondary transmission swing arm is swingably and slidably arranged relative to the primary transmission swing arm; Elastic member 1, two ends of which act on the primary transmission swing arm and the secondary transmission swing arm respectively; The third-stage transmission swing arm is hinged relative to the second-stage transmission swing arm, and two adjacent movable support plates are hinged to the same third-stage transmission swing arm.

[0008] As a further technical solution, the sliding transmission unit further includes: A hinged member 1 is arranged between the secondary transmission swing arm and the tertiary transmission swing arm, one end of the hinged member 1 is hinged to the secondary transmission swing arm, and the other end of the hinged member 1 is hinged to the tertiary transmission swing arm; The second hinged member is arranged between the three-stage transmission swing arm and the first movable support plate, one end of the second hinged member is hinged to the three-stage transmission swing arm, and the other end of the second hinged member is hinged to the first movable support plate.

[0009] As a further technical solution, the sliding transmission unit further includes: Rolling balls, which are arranged to roll on the movable support plate 1, and the number of the rolling balls is several, and the balls are located between the supporting platform and the movable support plate 1; The two ends of the elastic member 2 act on the supporting platform and the movable supporting plate 1 respectively. With the help of the force provided by the elastic member 2, the rolling ball located on the movable supporting plate 1 is in rolling contact with the supporting platform.

[0010] As a further technical solution, it also includes: The two ends of the elastic member three act on the supporting platform and the sliding seat respectively. With the help of the force provided by the elastic member three, the sliding seat has a tendency to slide toward the outer wall of the steel pipe.

[0011] As a further technical solution, it also includes: A side baffle, arranged on the supporting platform; The adjusting baffle is slidably arranged up and down relative to the supporting platform, and has a gun groove matched with the shape of the welding gun, and the gun groove abuts against the lower end surface of the welding gun.

[0012] As a further technical solution, it also includes: A feed box is arranged above the welding gun, a feed outlet of the feed box is connected with a feed inlet of the welding gun, and the feed box has a transparent observation window, and a minimum amount scale line and a maximum amount scale line are engraved on the side of the observation window.

[0013] As a further technical solution, a flux reflow unit is also included, and the flux reflow unit includes: A material collecting box is slidably arranged relative to the bracket, is located below the material supporting platform, and is used to collect the solder leaked from the material supporting platform; A material return box is arranged above the welding gun, and a material outlet of the material return box is connected with a material inlet of the welding gun; A pump body, wherein the feed port of the pump body is connected to the discharge port of the material receiving box, and the discharge port of the pump body is connected to the feed port of the material return box, and the pump body is used to transport the flux collected by the material receiving box to the material return box.

[0014] As a further technical solution, the flux reflow unit further includes: A medicine guiding plate is hinged to the material receiving box and has an arc-shaped material receiving opening; The elastic member 4 has two ends acting on the medicine guiding plate and the material receiving box respectively, and with the force provided by the elastic member 4, the arc-shaped material receiving port contacts the outer wall of the steel pipe; A screen is arranged at the upper end of the material receiving box and has leakage holes. The screen is located at the lower end of the medicine guiding plate.

[0015] The welding process for the submerged arc welding machine for vertical connection of marine engineering steel pipes is applied to the flux support system for the submerged arc welding machine for vertical connection of marine engineering steel pipes mentioned above, and comprises the following steps: Step S1: constructing a sliding track for the bracket to slide circumferentially around the steel pipe; Step S2: placing the bracket and the welding gun on the sliding track; Step S3: adding flux to the feed box so that the flux in the feed box is kept between the minimum amount scale line and the maximum amount scale line; Step S31: the flux in the feed box enters the feed port of the welding gun through the first hose, and the flux is transported to the area to be welded by means of the built-in components of the welding gun itself, and is accumulated on the support table until the flux in the area to be welded covers the gun head of the welding gun; Step S4: starting the welding gun to weld the area to be welded on the steel pipe; Step S41: the material receiving box receives and collects the solder dropped from the movable support plate 1, the movable support plate 2 and the material supporting platform; Step S42: when the flux in the receiving box reaches a preset amount, the pump body is started to transport the flux in the receiving box to the return box by negative pressure suction; Step S43: The flux in the return box is transported to the feed port of the welding gun through the second hose, so as to complete the circulation and recirculation of the flux for reuse; Step S5: applying external force to drive the bracket to slide along the sliding track, and welding is performed step by step along the circumferential direction of the steel pipe until the overall welding is completed.

[0016] The working principle and beneficial effects of the present invention are: In the present invention, the support system specifically includes a bracket, a support table, a slide, a movable support plate 1 and a movable support plate 2, wherein the number of movable support plates 1 is several, and the number of movable support plates 2 is one less than the number of movable support plates 1; the slide slides along the radial direction of the steel pipe, the movable support plate 1 slides close to or away from the outer wall of the steel pipe, and the movable support plate 2 is hingedly connected with the movable support plate 1 to perform a follow-up sliding motion. The welding gun is selected from the welding gun disclosed in the document with the authorization publication number CN220679645U, and the working parameters of the welding gun are adjusted by an external control console.

[0017] When in use, after the bracket is installed in place, an external force is applied to drive the slide seat to slide in the direction close to the outer wall of the steel pipe, and the slide seat drives the movable support plate 1 and the movable support plate 2 to slide in the direction close to the outer wall of the steel pipe at the same time; until the movable support plate 1 and the movable support plate 2 are in extrusion contact with the outer wall of the steel pipe, at this time, the movable support plate 1 and the movable support plate 2 are spaced apart in sequence, and the whole is adapted to the shape of the outer wall of the steel pipe; when the diameter of the steel pipe changes, taking the increase in diameter as an example, the two movable support plates 1 on both sides of the movable support plate 2 will rotate in the direction away from each other, and at the same time, the two movable support plates 1 will slide on the supporting platform, and with the help of the movable support plate 2 hinged between the two movable support plates 1, the relative angle between the two movable support plates 1 can be adjusted to adapt to the outer wall of the steel pipe with an increased diameter; conversely, when the diameter of the outer wall of the steel pipe becomes smaller, the two movable support plates 1 on both sides of the movable support plate 2 will rotate in the direction close to each other, and finally adapt to the diameter of the outer wall of the steel pipe, thereby improving the versatility of the supporting platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention when it is working (with a steel pipe and a welding gun); Figure 2 It is a schematic diagram of the overall structure of the present invention (without steel pipe and with welding gun); Figure 3 It is a schematic diagram of the structure of the present invention as a whole viewed from bottom to top (without welding gun); Figure 4 for Figure 3 A partial enlarged view of the middle A; Figure 5 This is a schematic diagram of the structure of the welding gun placement (without the welding gun) of the present invention; Figure 6 It is a structural schematic diagram of the junction of the magnetic attraction block and the magnetic leakage rod of the present invention; Figure 7 It is a structural schematic diagram of the joint of the movable support plate 1, the rolling ball and the support platform of the present invention; Figure 8 for Figure 7 A partial enlarged view of point B in the middle; In the figure: 1, bracket, 2, welding gun, 3, support table, 4, slide seat, 5, movable support plate 1, 6, movable support plate 2, 7, primary transmission swing arm, 8, secondary transmission swing arm, 9, elastic member 1, 10, tertiary transmission swing arm, 11, hinge member 1, 12, hinge member 2, 13, rolling ball, 14, elastic member 2, 15, elastic member 3, 16, side baffle, 17, adjustment baffle, 18, gun slot, 19, feeding box, 20, observation window, 21, collecting box, 22, return box, 23, medicine guide plate, 24. Elastic part four, 25. Screen, 26. Leakage hole, 27. Guide rail, 28. Welded upper seat, 29. Magnetic block, 30. Leakage rod, 31. Rocker, 32. Transmission rod, 33. Welded lower seat, 34. Turn handle, 35. Transmission gear two, 36. Toothed belt, 37. Elastic part five, 38. Lifting seat, 39. Horizontal axis one, 40. Lifting axis one, 41. Manual crank one, 42. Swinging part, 43. Horizontal axis two, 44. Manual crank two, 45. Transmission gear one, 46. Gun mount. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0021] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0022] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] Embodiment 1, refer to Figure 1 to Figure 6 , which is the first embodiment of the present invention, proposes a flux supporting system for a submerged arc welding machine for vertical jointing of marine engineering steel pipes.

[0025] In this embodiment, the support system specifically includes a bracket 1, a support platform 3, a slide 4, a movable support plate 1 5 and a movable support plate 2 6, wherein the number of movable support plates 1 5 is several, and the number of movable support plates 2 6 is one less than the number of movable support plates 1 5; the slide 4 slides along the radial direction of the steel pipe, and the movable support plate 1 5 moves close to or away from the outer wall of the steel pipe when sliding, and the movable support plate 2 6 performs a follow-up sliding motion by means of a hinged connection with the movable support plate 1 5. The welding gun 2 uses the welding gun 2 disclosed in the document with the authorization publication number CN220679645U, and the working parameters of the welding gun 2 are adjusted by an external control console.

[0026] When in use, after the bracket 1 is installed in place, an external force is applied to drive the slide seat 4 to slide in the direction close to the outer wall of the steel pipe, and the slide seat 4 drives the movable support plate 1 5 and the movable support plate 2 6 to slide in the direction close to the outer wall of the steel pipe at the same time; until the movable support plate 1 5 and the movable support plate 2 6 are in extrusion contact with the outer wall of the steel pipe, at this time, the movable support plate 1 5 and the movable support plate 2 6 are spaced in sequence, and the whole is adapted to the shape of the outer wall of the steel pipe; when the diameter of the steel pipe changes, taking the increase in diameter as an example, the two movable support plates 1 5 on both sides of the movable support plate 2 6 will rotate in the direction away from each other, and at the same time, the two movable support plates 1 5 slide on the supporting platform 3, and with the help of the movable support plate 2 6 hinged between the two movable support plates 1 5, the relative angle between the two movable support plates 1 5 can be adjusted to adapt to the outer wall of the steel pipe after the diameter increases; conversely, when the diameter of the outer wall of the steel pipe becomes smaller, the two movable support plates 1 5 on both sides of the movable support plate 2 6 will rotate in the direction close to each other, and finally adapt to the diameter of the outer wall of the steel pipe; improve the versatility of the supporting platform 3.

[0027] Before welding, adjust the position of the welding gun 2 so that the gun head of the welding gun 2 is exactly located in the area to be welded; then add flux to the welding gun 2, and drive the spiral blade to rotate through the rotating shaft on the welding gun 2 to push the flux to the gun head. At this time, flux is distributed on the support table 3, part of the movable support plate 1 5 and part of the movable support plate 2 6; with the help of the continuous rotation of the spiral blade, a certain extrusion pressure is maintained on the flux at the gun head, which is convenient for the welding operation of the gun head; to ensure the continuous progress of the welding operation, the amount of flux pushed by the spiral blade will be greater than the amount consumed by the welding of the gun head.

[0028] In order to better ensure the use and operation of the supporting platform 3, the supporting system is optimized, and a guide rail 27, a welding upper seat 28, a magnetic block 29, a magnetic leakage rod 30, a rocker rod 31, a transmission rod 32, a welding lower seat 33, a rotating handle 34, a transmission gear 2 35, a toothed belt 36 and an elastic member 5 37 are added. The elastic member 5 37 uses a spring in the prior art; wherein the guide rail 27 is annular as a whole and is sleeved on the outer wall of the steel pipe; the welding upper seat 28 is slidably set on the guide rail 27; the magnetic block 29 is slidably set on the welding upper seat 28, and the magnetic attraction force generated by the magnetic block 29 acts on the outer wall of the steel pipe; the magnetic leakage rod 30 is rotatably set on the welding upper seat 28; the swing rod 31 is arranged on the magnetic leakage rod 30 and has a slot; the transmission rod 32 is arranged on the magnetic suction block 29, and the transmission rod 32 is slidably and rotatably connected with the slot; the welding lower seat 33 is slidably arranged on the welding upper seat 28, and the bracket 1 is slidably arranged on the welding lower seat 33; the turning handle 34 is rotatably arranged on the welding upper seat 28; the transmission gear 2 35 is arranged on the turning handle 34; the toothed belt 36 is arranged on the welding lower seat 33, and the toothed belt 36 is meshed and connected with the transmission gear 2 35; the two ends of the elastic member 5 37 act on the welding lower seat 33 and the bracket 1 respectively, and the bracket 1 has a tendency to approach the outer wall of the steel pipe with the force provided by the elastic member 5 37. The guide track 27 as a whole includes a plurality of guide rails spliced ​​together, and by adjusting the number of guide rails, it can be applied to the outer wall of steel pipes of different diameters.

[0029] During operation, the overall support system can slide along the guide rail 27, which is convenient and quick for positioning; the guide rail 27 is used to provide a force support point at the upper end of the support platform 3, welding gun 2, etc.; at the same time, the magnetic attraction of the magnetic block 29 is used to fix the overall system on the outer wall of the steel pipe to achieve vertical welding, which can be referred to as vertical connection, thereby improving the efficiency of marine engineering steel pipe welding operations.

[0030] The transmission gear 2 35 is driven to rotate by rotating the handle 34, and the transmission gear 2 35 drives the welding lower seat 33 and the bracket 1 to slide up and down at the same time in turn through the meshing toothed belt 36, so as to adjust the distance between the support platform 3 and the area to be welded, and expand the application range of the support system; when the welding operation is completed, the magnetic leakage rod 30 can be pulled away from the outer wall of the steel pipe, and the magnetic leakage rod 30 drives the swing rod 31 to rotate synchronously with the welding upper seat 28 as the origin, and the swing rod 31 drives the transmission rod 32 and the magnetic suction block 29 to slide in the direction away from the outer wall of the steel pipe through the slot, thereby increasing the distance between the magnetic suction block 29 and the outer wall of the steel pipe, so that the magnetic suction force between the magnetic suction block 29 and the outer wall of the steel pipe is quickly attenuated, which is convenient for removing the operating equipment.

[0031] Example 2, refer to Figure 1 to Figure 6 , which is the second embodiment of the present invention, based on the first embodiment, this embodiment further adds a sliding transmission unit, refines the connection form between the movable support plate 1 5 and the movable support plate 2 6, and the sliding transmission unit as a whole is symmetrically distributed with the slide seat 4 as the center; the sliding transmission unit specifically includes a primary transmission swing arm 7, a secondary transmission swing arm 8, an elastic member 1 9 and a tertiary transmission swing arm 10; in this embodiment, the number of the primary transmission swing arm 7 is one, the number of the secondary transmission swing arm 8 and the elastic member 1 9 are both two, the number of the tertiary transmission swing arm 10 is four, and the elastic member 1 9 is a spring in the prior art. When in use, after the movable support plate 1 5 is in compression contact with the outer wall of the steel pipe, the movable support plate 1 5 slides in a direction away from the outer wall of the steel pipe with the help of the compression of the outer wall of the steel pipe, and at the same time, the movable support plate 1 5 drives the movable support plate 2 6 and the tertiary transmission swing arm 10 to slide simultaneously, and the tertiary transmission swing arm 10 further drives the secondary transmission swing arm 8 to slide synchronously, and the secondary transmission swing arm 8 drives the primary transmission swing arm 7 and the slide seat 4 to slide through the buffering of the elastic member 1 9.

[0032] At the same time, with the help of the three-stage transmission swing arm 10, a small four-bar structure is formed between two adjacent movable support plates 1 5, a movable support plate 2 6, and a three-stage transmission swing arm 10; a movable support plate 2 6 is arranged between any two adjacent small four-bar structures, and with the help of the two-stage transmission swing arm 8, a middle four-bar structure is formed between two adjacent small four-bar structures, a movable support plate 2 6, and a two-stage transmission swing arm 8; a movable support plate 2 6 is arranged between the two middle four-bar structures, which is defined as the main movable support plate 2 6, and the main movable support plate 2 6 is hinged to the supporting platform 3 and the two movable support plates 1 5 at the same time; with the help of the first-stage transmission swing arm 7, a large four-bar structure is formed between the two adjacent middle four-bar structures, the main movable support plate 2 6, and a first-stage transmission swing arm 7; with the help of the formed four-bar structure, the spaced movable support plates 1 5 and the movable support plates 2 6 are linked to ensure that the movable support plates 1 5, the movable support plates 2 6 and the outer wall of the steel pipe are in a fitted state, avoiding the formation of gaps on the outer wall of the steel pipe to cause welding flux leakage.

[0033] Example 3, refer to Figure 1 to Figure 6 , which is the third embodiment of the present invention. On the basis of the second embodiment, this embodiment further refines the sliding transmission unit, and adds a hinge 11 and a hinge 2 12; wherein the number of hinges 11 is preferably two, and the number of hinges 2 12 is preferably four; a third-stage transmission swing arm 10 is hinged with a hinge 2 12, and a second-stage transmission swing arm 8 is hinged with a hinge 11; the small four-bar structure is changed into a small five-bar structure by the added hinge 2 12, and the middle four-bar structure is changed into a middle five-bar structure by the added hinge 11, which increases the diversity of the sliding changes of the movable support plate 1 5 and the movable support plate 2 6, and is better suitable for steel pipes of various diameters. Even if the outer wall surface of the steel pipe is bulged or deformed, local deformation can be achieved, thereby expanding the scope of application and improving versatility.

[0034] Embodiment 4, referring to Figure 6~Figure 8 , which is the fourth embodiment of the present invention. On the basis of the second embodiment, this embodiment further refines the sliding transmission unit, adds a rolling ball 13 and an elastic member 14, and the elastic member 14 is preferably a spring in the prior art; the elastic member 14 is located above the movable support plate 1 5, and the elastic member 14 passes through the through hole on the supporting platform 3 to be connected with the movable support plate 1 5; the diameter of the through hole is larger than the maximum outer diameter of the elastic member 14; the elastic member 14 can be extended and retracted along the direction of passing through the through hole, and can also shake in the cross section of the through hole.

[0035] During operation, the elastic member 2 14 is in an extended state, and the force provided by the elastic member 2 14 causes the movable support plate 1 5 to squeeze the ball 13 upward, and the ball 13 squeezes the support platform 3, ensuring that the movable support plate 1 5 and the movable support plate 2 6 will not bend and deform downward; when the movable support plate 1 5 slides along the support platform 3, the ball 13 reduces the friction between the movable support plate 1 5 and the support platform 3, facilitating the flexible sliding of the movable support plate 1 5; with the help of the elastic member 2 14, the movable support plate 1 5, the ball 13 and the support platform 3 are in flexible extrusion contact in turn.

[0036] Example 5, refer to Figure 3~Figure 8, which is the fifth embodiment of the present invention. On the basis of the second embodiment, this embodiment further adds an elastic member three 15. The elastic member three 15 is preferably a spring in the prior art. When in use, the elastic member three 15 is in a compressed state. With the help of the force provided by the elastic member three 15, the slide 4 always has a tendency to approach the outer wall of the steel pipe. When the outer wall of the steel pipe squeezes the movable support plate one 5 and the movable support plate two 6 to slide, the squeezing force is transmitted to the slide 4 through the connection of the first-stage transmission swing arm 7, the second-stage transmission swing arm 8, the elastic member one 9 and the third-stage transmission swing arm 10, and is buffered by the elastic member one 9 and the elastic member three 15; when the outer wall of the steel pipe is separated from the movable support plate one 5 and the movable support plate two 6, the elastic member one 9 and the elastic member three 15 are used to restore the components to their original positions, waiting for the next change and adjustment.

[0037] Example 6, refer to Figure 1 to Figure 8 , which is the sixth embodiment of the present invention. On the basis of embodiment 1, this embodiment further adds side baffles 16 and adjusting baffles 17, wherein the number of adjusting baffles 17 is several, and the whole is in a stacked state. Each single adjusting baffle 17 can be adjusted up and down separately, and the gun groove 18 on the highest adjusting baffle 17 is adapted to the welding gun 2; the number of side baffles 16 is preferably two, which are respectively located on both sides of the adjusting baffle 17; during work, as the welding operation proceeds, the flux at the gun head will gradually increase, and the flux accumulated on the movable support plate 1 5 and the movable support plate 2 6 will gradually increase; at this time, the two side baffles 16, the stacked adjusting baffles 17 and the outer wall of the steel pipe form a nearly closed annular chamber as a whole, which prevents the accumulated flux from scattering around and reduces the waste of flux. At the same time, with the help of the nearly closed annular chamber, the flux can be effectively accumulated in the area to be welded, thereby ensuring the welding effect.

[0038] In actual operation, for different areas to be welded, in order to ensure the welding effect, it is necessary to adjust the height position and tilt angle of the welding gun 2, so a lifting seat 38, a horizontal axis 39, a lifting axis 40, a manual crank 41, a swing member 42, a horizontal axis 43, a manual crank 44, a transmission gear 45 and a gun holder 46 are added; wherein the lifting seat 38 is slidably arranged up and down relative to the welding lower seat body 33; the horizontal axis 39 is rotatably arranged on the welding lower seat body 33; the lifting axis 40 is rotatably arranged on the welding lower seat body 33 On the upper part, the lifting shaft 40 is meshed and connected with the horizontal shaft 39 through the first bevel gear pair; the manual crank 41 is arranged on the horizontal shaft 39; the swing member 42 is swingably arranged on the lifting seat 38, and the swing member 42 is provided with transmission teeth; the horizontal shaft 43 is rotatably arranged on the lifting seat 38; the manual crank 44 is arranged on the horizontal shaft 43; the transmission gear 45 is arranged on the horizontal shaft 43, and the transmission gear 45 is meshed and connected with the transmission teeth; the gun rack 46 is arranged on the swing member 42, and the gun rack 46 is used to fix the welding gun 2.

[0039] When in use, the horizontal axis 1 39 is driven to rotate by turning the manual crank 1 41, and the horizontal axis 1 39 drives the lifting axis 1 40 to rotate through the first bevel gear pair, and the lifting seat 38 is driven to slide up and down by the rotation of the lifting axis 1 40, thereby adjusting the height position of the welding gun 2. The horizontal axis 2 43, the transmission gear 1 45 and the swing member 42 are driven by turning the manual crank 2 44 in sequence, and the swing member 42 drives the gun frame 46, so that the swing member 42 starts to swing, thereby adjusting the welding angle of the welding gun 2, and completing the adjustment of the angle of the welding gun 2. Whether adjusting the height or angle of the welding gun 2, the height of the adjusting baffle 17 must be adjusted accordingly, and the card slot of the top adjusting baffle 17 is connected to the welding gun 2 as much as possible to reduce the risk of flux falling.

[0040] Embodiment 7, reference Figure 1~Figure 2 , which is the seventh embodiment of the present invention. On the basis of the first embodiment, this embodiment further adds a feeding box 19 and a flux reflow unit, wherein the flux reflow unit specifically includes a receiving box 21, a return box 22, a pump body, a flux guide plate 23, an elastic member four 24 and a screen 25; the elastic member four 24 is a spring in the prior art, and the pump body is a fan pump in the prior art, which is not shown in the figure. The flux in the receiving box 21 is transported to the return box 22 by negative pressure adsorption, so as to realize the recycling of the flux, reduce waste and reduce costs.

[0041] In actual operation, in order to cooperate with the use of the laser locator on the welding gun 2, two positioning holes are opened on the support table 3; the lower end of the positioning hole is lower than the height of the welding gun 2; as the welding operation proceeds, more and more welding flux will appear on the support table 3, the movable support plate 1 5 and the movable support plate 2 6, part of which will fall down from the positioning holes, part of which will fall under the welding gun 2, and part of which will fall from the gap between the movable support plate 1 5, the movable support plate 2 6 and the outer wall of the steel pipe.

[0042] Before working, align the arc-shaped material receiving port on the medicine guide plate 23 with the outer wall of the steel pipe. After the bracket 1 is installed in place, the medicine guide plate 23 and the outer wall of the steel pipe are in extrusion contact. With the extrusion of the outer wall of the steel pipe, the medicine guide plate 23 drives the elastic member 24 to be in an extended state, so that the arc-shaped material receiving port and the outer wall of the steel pipe are kept in extrusion contact. An oblong hole is opened on the welded lower seat 33, and a sliding rod is set on the collection box. The collection box is pushed along the oblong hole. The spacing between the collection box and the steel pipe can be adjusted according to actual operation needs, realizing flexible and convenient operation.

[0043] Part of the solder that falls downward is directly filtered through the screen 25 and enters the collection box, and part of the solder close to the outer wall of the steel pipe falls onto the solder guide plate 23 and rolls onto the screen 25 with the help of the solder guide plate 23; finally, all the solder that falls downward enters the collection box and is sucked by the pump body and transported to the return box 22 for recycling and reuse. The screen 25 can effectively prevent some impurities from entering the return box 22.

[0044] Embodiment 8, refer to Figure 1 to Figure 8 , which is the eighth embodiment of the present invention, proposes a welding process for vertical joint of marine engineering steel pipe using a submerged arc welding machine. Specifically, it includes the following implementation steps: Step S1: construct a bracket 1 for a guide track 27 that slides circumferentially around a steel pipe; select a suitable number of guide rails according to the diameter of the outer wall of the steel pipe, assemble them around the outer wall of the steel pipe to form a guide track 27, and fix them on the outer wall of the steel pipe; Step S2: placing the support system (including the welding gun 2) on the guide rail 27; hanging the welding upper seat 28 in the support system on the guide rail 27, adsorbing the welding gun 2 on the outer wall of the steel pipe through the magnetic attraction of the magnetic block 29, and fixing the welding gun 2 on the gun seat; adjusting the height position and welding angle of the welding gun 2 by turning the manual crank 1 41 and the manual crank 2 44; Step S3: adding a certain amount of flux into the feed box 19 so that the flux in the feed box 19 is kept between the minimum amount scale line and the maximum amount scale line; Step S31: the flux in the feed box 19 enters the feed port of the welding gun 2 through the first hose, and the flux is transported to the area to be welded by means of the built-in components of the welding gun 2, and is accumulated on the support table 3 until the flux in the area to be welded covers the gun head of the welding gun 2; Step S4: start the welding gun 2 to weld the area to be welded on the steel pipe; Step S41: The collection box receives and collects the flux dropped from the movable support plate 1 5, the movable support plate 2 6 and the support table 3; during actual operation, as the spiral blade on the welding gun 2 continuously delivers flux, the flux in the area to be welded gradually accumulates, and part of the flux drops from the positioning hole on the support table 3, the clamping gap between the welding gun 2 and the adjustment baffle 17, the joint between the movable support plate 1 5 and the outer wall of the steel pipe, the joint between the movable support plate 2 6 and the outer wall of the steel pipe, and other positions, and finally enters the collection box after being guided by the flux guide plate 23; Step S42: When the amount of solder in the receiving box 21 reaches a certain amount, the pump is started to transport the solder in the receiving box 21 to the return box 22 by negative pressure suction; Step S43: The flux in the return box 22 is transported to the feed port of the welding gun 2 through the second hose, completing the circulation of the flux for reuse; as the welding operation proceeds, the flux is gradually consumed, and the flux in the replenishment box 19 is replenished in time to avoid insufficient flux at the gun tip, which may cause welding failure; Step S5: Apply external force to drive the bracket 1 to slide along the guide track 27, and weld step by step along the circumferential direction of the steel pipe until the overall welding is completed. After each position is welded, the magnetic leakage rod 30 is rotated to reduce the magnetic attraction between the magnetic attraction block 29 and the outer wall of the steel pipe, and then an external force is applied to drive the bracket 1 to slide along the guide track 27 to weld the next position. The implementation of the above steps completes the vertical welding, avoids the loss of flux falling, and improves the recovery rate of flux.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A flux support system for a vertical submerged arc welding machine for marine engineering steel pipes, characterized in that: include: A bracket (1) is used for the outside of the steel pipe and is slidably arranged relative to the outer wall of the steel pipe, and the bracket (1) is used to place a welding gun (2) for welding; A support platform (3) is rotatably arranged relative to the support frame (1), is located below the welding gun (2), and is used to support the welding flux; A slide seat (4) is slidably arranged relative to the support platform (3), and the slide seat (4) moves closer to or farther from the outer wall of the steel pipe after sliding; A plurality of movable support plates (5) are slidably arranged relative to the support platform (3) and are located below the support platform (3), wherein the movable support plates (5) are in contact with the outer wall of the steel pipe; A movable support plate 2 (6), wherein one movable support plate 2 (6) is arranged between any two adjacent movable support plates 1 (5), and the movable support plate 2 (6) is hinged to the movable support plate 1 (5).

2. The flux support system for the submerged arc welding machine for vertical joint of marine engineering steel pipe according to claim 1 is characterized in that: It also includes a sliding transmission unit, the sliding transmission unit comprising: A primary transmission swing arm (7) rotatably disposed on the slide seat (4); A secondary transmission swing arm (8) is swingably and slidably arranged relative to the primary transmission swing arm (7); An elastic member (9) having two ends respectively acting on the primary transmission swing arm (7) and the secondary transmission swing arm (8); The third-stage transmission swing arm (10) is hinged relative to the second-stage transmission swing arm (8), and two adjacent movable support plates (5) are hinged to the same third-stage transmission swing arm (10).

3. The flux support system for the submerged arc welding machine for vertical joint of marine engineering steel pipe according to claim 2 is characterized in that: The sliding transmission unit also includes: A hinged member (11) is arranged between the secondary transmission swing arm (8) and the tertiary transmission swing arm (10), one end of the hinged member (11) being hinged to the secondary transmission swing arm (8), and the other end of the hinged member (11) being hinged to the tertiary transmission swing arm (10); The second hinged member (12) is arranged between the third-stage transmission swing arm (10) and the first movable support plate (5), one end of the second hinged member (12) is hinged to the third-stage transmission swing arm (10), and the other end of the second hinged member (12) is hinged to the first movable support plate (5).

4. The flux support system for the submerged arc welding machine for vertical joint of marine engineering steel pipe according to claim 2 is characterized in that: The sliding transmission unit also includes: A rolling ball (13) is arranged to roll on the movable support plate (5), wherein the rolling ball (13) is a plurality of balls and is located between the support platform (3) and the movable support plate (5); The two ends of the elastic member 2 (14) act on the supporting platform (3) and the movable supporting plate 1 (5) respectively. With the help of the force provided by the elastic member 2 (14), the rolling ball (13) located on the movable supporting plate 1 (5) rolls in contact with the supporting platform (3).

5. The flux support system for the submerged arc welding machine for vertical joint of marine engineering steel pipe according to claim 2 is characterized in that: Also includes: The two ends of the elastic member three (15) act on the supporting platform (3) and the sliding seat (4) respectively. With the help of the force provided by the elastic member three (15), the sliding seat (4) has a tendency to slide towards the outer wall of the steel pipe.

6. The flux support system for the submerged arc welding machine for vertical joint of marine engineering steel pipe according to claim 1 is characterized in that: Also includes: A side baffle (16) arranged on the material supporting platform (3); An adjusting baffle (17) is slidably arranged up and down relative to the material supporting platform (3) and has a gun groove (18) matching the outer shape of the welding gun (2), wherein the gun groove (18) abuts against the lower end surface of the welding gun (2).

7. The flux support system for the submerged arc welding machine for vertical joint of marine engineering steel pipe according to claim 1 is characterized in that: Also includes: A feed box (19) is arranged above the welding gun (2); an outlet of the feed box (19) is connected to an inlet of the welding gun (2); the feed box (19) has a transparent observation window (20); and a minimum amount scale line and a maximum amount scale line are engraved on the side of the observation window (20).

8. The flux support system for the submerged arc welding machine for vertical joint of marine engineering steel pipe according to claim 7 is characterized in that: Also included is a flux reflow unit, the flux reflow unit comprising: A material collecting box (21) is slidably arranged relative to the bracket (1), is located below the material supporting platform (3), and is used to collect the solder that leaks from the material supporting platform (3); A material return box (22) is arranged above the welding gun (2), and the material outlet of the material return box (22) is connected to the material inlet of the welding gun (2); A pump body, wherein the feed port of the pump body is connected to the discharge port of the material receiving box (21), and the discharge port of the pump body is connected to the feed port of the material return box (22), and the pump body is used to transport the solder collected by the material receiving box (21) to the material return box (22).

9. The flux support system for the submerged arc welding machine for vertical joint of marine engineering steel pipe according to claim 8, characterized in that: The flux reflow unit also includes: A medicine guiding plate (23) is hingedly connected to the material receiving box (21) and has an arc-shaped material receiving opening; The elastic member four (24) has two ends acting on the medicine guiding plate (23) and the material receiving box (21) respectively, and with the help of the force provided by the elastic member four (24), the arc-shaped material receiving port contacts the outer wall of the steel pipe; The screen (25) is arranged at the upper end of the material receiving box (21) and has a leakage hole (26). The screen (25) is located at the lower end of the medicine guiding plate (23).

10. A welding process for a submerged arc welding machine for vertical connection of marine engineering steel pipes, applied to the flux support system for a submerged arc welding machine for vertical connection of marine engineering steel pipes as claimed in claim 9, characterized in that: The following steps are involved: Step S1: constructing a sliding track for the bracket (1) to slide circumferentially around the steel pipe; Step S2: placing the bracket (1) and the welding gun (2) on the sliding track; Step S3: adding flux to the feed box (13) so that the flux in the feed box (13) is maintained between a minimum amount scale line and a maximum amount scale line; Step S31: the flux in the feed box (13) enters the feed port of the welding gun (2) through the first hose, and the flux is transported to the area to be welded with the help of the built-in components of the welding gun (2), and is accumulated on the support table (3) until the flux in the area to be welded covers the gun head of the welding gun (2); Step S4: starting the welding gun (2) to weld the area to be welded on the steel pipe; Step S41: the material receiving box (21) receives and collects the solder that falls from the movable support plate 1 (5), the movable support plate 2 (6) and the material supporting platform (3); Step S42: when the flux in the receiving box (21) reaches a preset amount, the pump body is started to transport the flux in the receiving box (21) to the return box (22) by means of negative pressure suction; Step S43: the flux in the return box (22) is transported to the feed port of the welding gun (2) through the second hose, thereby completing the circulation and recirculation of the flux for reuse; Step S5: applying external force to drive the bracket (1) to slide along the sliding track, and gradually welding along the circumferential direction of the steel pipe until the overall welding is completed.

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