Prefabricated steel structural part welding device

Abstract

The invention relates to the field of prefabricated steel welding, in particular to a prefabricated steel structural part welding device which comprises a C-shaped supporting frame and a first hydraulic rod detachably installed on the outer side surface of the C-shaped supporting frame, a limiting sleeve is fixedly connected to the output end of the first hydraulic rod, and a protective gas hood is arranged on the inner side wall face of the limiting sleeve. A hydraulic pump is arranged in the protective gas hood, and a butt joint is fixedly connected to the output end of the hydraulic pump. When the plasma arc welding connector is replaced with a new plasma arc welding connector, the rhombic protruding strips on the outer side surface of the top end of the plasma arc welding connector are used for pushing and extruding the bottom surface of the clamping block towards the two sides, the butt joint groove in the top end of the plasma arc welding connector is connected to the outer side surface of the butt joint in a sleeving mode, and due to the fact that the butt joint groove and the rhombic protruding strips are tightly attached, the butt joint is not prone to deformation. Therefore, the plasma arc welding joint does not incline at excessive angles, and when the plasma arc welding joint slightly inclines, the friction force between the butt joint groove and the butt joint can be increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of prefabricated steel welding, and specifically relates to a welding device for prefabricated steel structures. Background Art

[0002] Welding technology is one of the key technologies in the engineering manufacturing process. Laser welding technology is widely used in industrial production such as aerospace, high-speed trains, and automobiles due to its outstanding advantages such as high energy density, fast welding speed, large weld depth-to-width ratio, good joint performance, and small welding structure deformation. Plasma arc welding has the characteristics of concentrated energy, high productivity, fast welding speed, small stress and deformation, stable arc, and is suitable for welding thin plates and box materials, etc., and is particularly suitable for welding various refractory, easily oxidized, and heat-sensitive metal materials; Plasma arc welding refers to a fusion welding method that uses a plasma arc with a high energy density beam as the welding heat source.

[0003] A patent with the publication number CN117600630 discloses an aluminum alloy plasma arc welding joint and a welding device, including a welding body and a nozzle connected to the welding body. The nozzle includes a protective edge and a connecting ring disposed inside the protective edge. The connecting ring is connected to the protective edge through a first connecting rod and a second connecting rod; an inlet cooling cavity and an outlet cooling cavity are provided inside the protective edge. The inlet cooling cavity and the outlet cooling cavity are separated by a spacer ring. A cooling cavity is provided inside the connecting ring. A first connecting channel is provided inside the first connecting rod, and a second connecting channel is provided inside the second connecting rod. Both ends of the first connecting channel are respectively communicated with the inlet cooling cavity and the cooling cavity, and both ends of the second connecting channel are respectively communicated with the outlet cooling cavity and the cooling cavity. During operation, the cold medium enters from the inlet cooling cavity, passes through the first connecting channel into the cooling cavity, and then enters the outlet cooling cavity through the second connecting channel to realize the circulation of the cold medium. The cold medium and the shielding gas are used in cooperation to cool the nozzle, thereby reducing the possibility that the nozzle overheats and affects the welding quality A.

[0004] In the current prior art, when existing workers operate a plasma arc welder for welding, the plasma arc welder needs to be perpendicular or at a certain inclined angle to the top surface of the steel plate, and slide along the steel plate gap on the surface of the steel plate for welding. Since the heat of the arc will melt the surface of the base metal at the welding joint to form a molten pool, the liquid inside the molten pool will solidify under natural cooling. However, when workers or machinery drag the plasma arc welder, changes in angle, speed, and dwell time will occur between the plasma arc welding torch and the prefabricated steel plate due to long-distance sliding or position changes. These changes will cause changes in the welding operation. When the angle of the plasma arc welding torch is too large or too small, and the distance of the plasma arc welding torch is too close, it will cause the metal solution in the molten pool to splash or flow towards the welding head, resulting in welding spots. Since the welding head is positioned by a threaded fixing method, and the overheated welding head cannot be quickly disassembled, it can only be replaced after the welding head cools naturally, which wastes too much time.

[0005] To this end, the present invention provides a welding device for prefabricated steel structural members. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A welding device for prefabricated steel structural members according to the present invention includes a C-shaped support frame and a first hydraulic rod detachably installed on the outer surface of the C-shaped support frame. A limit sleeve is fixedly connected to the output end of the first hydraulic rod. A protective gas hood is arranged on the inner wall surface of the limit sleeve. A hydraulic pump is arranged inside the protective gas hood. A docking head is fixedly connected to the output end of the hydraulic pump. A tungsten electrode collet is fixedly installed on the inner wall surface of the top of the protective gas hood. Elastic arms II are fixedly connected to the bottom surface of the tungsten electrode collet and located on both side edges of the hydraulic pump. A clamping block is fixedly connected to one end of the elastic arm II. A diamond-shaped groove is formed on the inner wall surface of the clamping block. A plasma arc welding head is movably sleeved on the outer surface of the docking head. Diamond-shaped protrusions movably sleeved on the inner wall surface of the diamond-shaped groove are arranged on the outer surface of the top end of the plasma arc welding head. A docking groove closely fitting on the outer surface of the docking head is formed on the top end of the plasma arc welding head.

[0008] Preferably, a circular groove is formed on the inner wall surface of the bottom of the diamond-shaped groove. A groove is formed on the outer surface of the bottom of the diamond-shaped protrusion. Elastic wires are fixedly connected to the inner wall surface of the groove. The other ends of the elastic wires are fixedly connected to circular balls movably lapped on the inner wall surface of the circular groove.

[0009] Preferably, a second limit rod is fixedly connected to the inner wall surface of the limit sleeve. A limit collar is movably sleeved on the outer surface of the second limit rod. Limit elastic wires are fixedly connected to both inner wall surfaces of the limit sleeve. Protective sheaths are fixedly connected to the upper and lower surfaces of the limit collar. The other ends of the limit elastic wires are fixedly connected to the outer surface of the protective sheath. A second hydraulic rod is fixedly installed on the inner wall surface of the top of the protective sheath. The output end of the second hydraulic rod is fixedly connected to one end of the protective gas hood. Elastic arms I are fixedly connected to both inner wall surfaces of the protective sheath. A semi-circular sleeve is fixedly connected to the other end of the elastic arm I. The inner wall surface of the semi-circular sleeve is movably sleeved on the outer surface of the protective gas hood. A power cord is fixedly installed on the outer surface of the protective sheath. One end of the power cord is movably sleeved on the outer surface of the limit sleeve.

[0010] Preferably, a third limiting rod is fixedly connected to the bottom end of the semi-circular sleeve, a buffer wire is movably sleeved on the outer surface of the third limiting rod, and a retractable extrusion scraping strip movably sleeved on the inner wall surface of the semi-circular sleeve is fixedly connected to the other ends of the third limiting rod and the buffer wire.

[0011] Preferably, one end of the tungsten electrode collet is fixedly connected to the outer surface of the top of the hydraulic pump, and the clamping block is horizontally arranged at the two side edges of the docking head.

[0012] Preferably, the plasma arc welding head is arranged on the inner wall surface of the protective gas hood, and a cavity is arranged between the plasma arc welding head and the protective gas hood.

[0013] Preferably, a limiting track table is movably sleeved on the outer surface of the C-shaped support frame, a processing table is fixedly connected to the outer surface of the bottom of the limiting track table, and a prefabricated steel structure is movably lapped on the top surface of the processing table.

[0014] Preferably, a threaded hole is formed in the middle of the outer surface of the C-shaped support frame, rectangular limiting grooves are formed in the two side edges of the outer surface of the C-shaped support frame at both sides of the threaded hole, a limiting sleeve is movably sleeved on the inner wall surface of the rectangular limiting groove, and a second motor is fixedly installed on the inner wall surface of the limiting sleeve.

[0015] Preferably, a threaded rod is fixedly connected to the output end of the second motor, the outer surface of the threaded rod is threadedly movably sleeved on the inner wall surface of the threaded hole, a limiting slider is fixedly connected to one end of the limiting sleeve, a clamping plate is arranged on the bottom surface of the limiting slider, an extrusion fitting arm is fixedly connected to one end surface of the C-shaped support frame, a limiting card slot is arranged at one end of the extrusion fitting arm, an elastic pushing wire is fixedly connected to the tip of the extrusion fitting arm, and an extrusion block movably sleeved on the outer surface of the limiting card slot is fixedly connected to the other end of the elastic pushing wire.

[0016] Preferably, first motors are fixedly installed on the two side surfaces of the limiting track table, a threaded rod movably sleeved on the outer surface of the limiting track table is fixedly connected to the output end of the first motor, the outer surface of the threaded rod is threadedly movably sleeved on the inner wall surface of the limiting slider, a first limiting rod is arranged on the inner wall surface of the limiting track table, and a downward pressing support arm movably lapped on the outer surface of the top of the prefabricated steel structure is movably sleeved on the outer surface of the first limiting rod.

[0017] The beneficial effects of the present invention are as follows: 1. For a prefabricated steel structure component welding device according to the present invention, when the plasma arc welding head needs to be replaced, the hydraulic pump on the bottom surface of the tungsten electrode jacket is used to push the docking head, and the arc on the bottom surface of the diamond-shaped convex strip pushes the inner side wall of the bottom of the diamond-shaped groove to both sides and spreads it, so that the surface of the diamond-shaped convex strip completely disengages from the inner surface of the diamond-shaped groove. When there is no obstruction on the top surface of the plasma arc welding head, the vertical protective gas hood can greatly reduce the friction with the inner side wall of the docking groove at this time. Then, with the gravity of the plasma arc welding head itself, it can automatically disengage from the outer surface of the docking head, achieving the effect that the plasma arc welding head in the vertical state can greatly reduce the friction with the surface of the docking head, enabling the plasma arc welding head to automatically fall off from the surface of the docking head, and then replacing the plasma arc welding head; 2. For a prefabricated steel structure component welding device according to the present invention, when replacing a new plasma arc welding head, the diamond-shaped convex strip on the outer surface of the top end of the plasma arc welding head is used to push and squeeze the bottom surface of the clamping block to both sides, causing the clamping block to expand to both sides, and sleeving the docking groove on the top end of the plasma arc welding head on the outer surface of the docking head. Due to the tight fit between the docking groove and the diamond-shaped convex strip, the plasma arc welding head will not have excessive angular inclination. When the plasma arc welding head has a slight inclination, it will increase the friction between the docking groove and the docking head, so that when the protective gas hood is at an inclined angle, the top end of the plasma arc welding head will not fall off from the outer surface of the docking head; 3. For a prefabricated steel structure component welding device according to the present invention, when the protective gas hood is lapped on the surface of the precast slab and the power cord is used to energize the protective gas hood, the protective gas hood can perform welding at a vertical angle. When the protective gas hood needs to weld precast slabs of different thicknesses, when the protective gas hood slides on the surface of the precast slab and slightly presses down on the limit sleeve, the limit collar on the outer surface of one end of the hydraulic rod two slightly flips on the surface of the limit rod two. Using the inclined angle between the protective gas hood and the precast slab, precast slabs of different thicknesses can be welded, and the shape and size of the molten pool can be controlled, increasing the penetration depth and reducing the oxidation of the weld surface; BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 is a perspective view of the present invention; Figure 2 is an exploded perspective view of the processing table in the present invention; Figure 3 is a sectional perspective view of the limit sleeve in the present invention; Figure 4It is a perspective view of the protective sleeve shell in the present invention when it is sectioned and closed; Figure 5 It is a perspective view of the protective gas hood in the present invention when it is sectioned; Figure 6 It is a perspective view of the plasma arc welding head in the present invention with a partial enlargement; Figure 7 It is a perspective view of the semi-circular sleeve in the present invention when it is sectioned; Figure 8 It is a perspective view of the C-shaped support frame in the present invention; Figure 9 It is a perspective view of the extrusion and fitting arm in the present invention.

[0020] In the figure: 11, processing table; 12, limit track table; 121, motor one; 122, threaded rod; 123, limit rod one; 124, downward pressure support arm; 13, C-shaped support frame; 131, limit sleeve shell; 132, motor two; 133, limit slider; 134, clamping plate; 135, extrusion and fitting arm; 136, limit card slot; 137, elastic push wire; 138, extrusion block; 14, hydraulic rod one; 141, limit sleeve; 142, limit elastic wire; 143, limit rod two; 144, limit ring; 145, power cord; 146, protective sleeve shell; 147, elastic arm one; 148, semi-circular sleeve; c1, limit rod three; c2, buffer wire; c3, retractable extrusion scraping strip; 149, hydraulic rod two; 1410, protective gas hood; a1, tungsten electrode clamp sleeve; a2, docking head; a3, elastic arm two; a4, clamping block; a5, diamond-shaped groove; a6, plasma arc welding head; a7, docking groove; a8, diamond-shaped convex strip; a9, circular groove; a10, elastic wire; a11, circular ball; 15, prefabricated steel structure. Specific embodiments

[0021] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0022] Such as Figures 1 to 6 And Figure 8As shown in the figure, a welding device for prefabricated steel structural members according to an embodiment of the present invention includes a C-shaped support frame 13 and a first hydraulic rod 14 detachably installed on the outer surface of the C-shaped support frame 13. A limit sleeve 141 is fixedly connected to the output end of the first hydraulic rod 14. A protective gas hood 1410 is provided on the inner wall surface of the limit sleeve 141. A hydraulic pump is provided inside the protective gas hood 1410. A docking head a2 is fixedly connected to the output end of the hydraulic pump. Elastic arms a3 are fixedly connected to the bottom surface of the tungsten electrode collet a1 and on both side edge positions of the hydraulic pump. A clamping block a4 is fixedly connected to one end of the elastic arms a3. A diamond-shaped groove a5 is formed on the inner wall surface of the clamping block a4. A plasma arc welding head a6 is movably sleeved on the outer surface of the docking head a2. A diamond-shaped rib a8 movably sleeved on the inner wall surface of the diamond-shaped groove a5 is provided on the outer surface of the top end of the plasma arc welding head a6. A docking groove a7 closely fitting on the outer surface of the docking head a2 is formed on the top end of the plasma arc welding head a6.

[0023] When the plasma arc welding head a6 needs to be replaced, the hydraulic pump on the bottom surface of the tungsten electrode collet a1 is used to push the docking head a2, and the arc on the bottom surface of the diamond-shaped rib a8 pushes the inner wall surface of the bottom of the diamond-shaped groove a5 to expand to both sides, and the surface of the diamond-shaped rib a8 completely disengages from the inner surface of the diamond-shaped groove a5. When there is no obstruction on the top surface of the plasma arc welding head a6, the vertical protective gas hood 1410 can greatly reduce the friction with the inner wall surface of the docking groove a7. Then, with the self-weight of the plasma arc welding head a6, it can automatically disengage from the outer surface of the docking head a2, achieving the effect that the plasma arc welding head a6 in the vertical state can greatly reduce the friction with the surface of the docking head a2, so that the plasma arc welding head a6 can automatically fall off from the surface of the docking head a2, and then the plasma arc welding head a6 can be replaced. When replacing the new plasma arc welding head a6, the diamond-shaped rib a8 on the outer surface of the top end of the plasma arc welding head a6 is used to push and squeeze the bottom surface of the clamping block a4 to both sides, so that the clamping block a4 expands to both sides, and the docking groove a7 on the top end of the plasma arc welding head a6 is sleeved on the outer surface of the docking head a2. Due to the close fit between the docking groove a7 and the diamond-shaped rib a8, the plasma arc welding head a6 will not have excessive angular inclination. When the plasma arc welding head a6 has a slight inclination, it will increase the friction between the docking groove a7 and the docking head a2, so that when the protective gas hood 1410 is at an inclined angle, the top end of the plasma arc welding head a6 will not fall off from the outer surface of the docking head a2. When the docking groove a7 is completely clamped onto the outer surface of the docking head a2, the second elastic arm a3 will reset the position of the clamping block a4, and make the diamond-shaped groove a5 on the inner wall surface of the clamping block a4 completely fit onto the outer surface of the diamond-shaped rib a8. When the protective gas hood 1410 is at a vertical angle and the plasma arc welding head a6 sags, the inner wall surface of the diamond-shaped groove a5 will limit the position of the surface of the diamond-shaped rib a8, and the self-weight of the plasma arc welding head a6 will not generate too much thrust on the surfaces of the clamping block a4 and the second elastic arm a3. The second elastic arm a3 that is not easily deformed will always effectively position and clamp the plasma arc welding head a6 in terms of position.

[0024] As Figures 3 to 6 shown, a circular groove a9 is provided on the inner bottom wall surface of the diamond-shaped groove a5, and a groove is provided on the outer bottom surface of the diamond-shaped rib a8. A resilient wire a10 is fixedly connected to the inner wall surface of the groove, and the other end of the resilient wire a10 is fixedly connected to a circular ball a11 that is movably lapped on the inner wall surface of the circular groove a9; A tungsten electrode collet a1 is fixedly installed on the inner top wall surface of the protective gas hood 1410. One end of the tungsten electrode collet a1 is fixedly connected to the outer surface of the top of the hydraulic pump. The position of the clamping block a4 is horizontally arranged at the two side edges of the docking head a2. The position of the plasma arc welding head a6 is arranged on the inner wall surface of the protective gas hood 1410. There is a cavity between the plasma arc welding head a6 and the protective gas hood 1410.

[0025] When the clamping block a4 completely wraps around the diamond-shaped rib a8, it cooperates with the resilient wire a10 to elastically push the circular ball a11, and makes half of the circular ball a11 extend and be clamped into the interior of the circular groove a9. The circular ball a11 is used to increase the interlaced extrusion between the diamond-shaped rib a8 and the diamond-shaped groove a5, so as to increase the friction and anti-slip force between the two; When the plasma arc welding head a6 performs welding, it cooperates with the cavity to concentrate and disperse the high temperature generated when the plasma arc welding head a6 is energized. At the same time, the cavity is used to prevent the plasma arc welding head a6 from directly contacting the protective gas hood 1410, so that the high temperature on the surface of the plasma arc welding head a6 will directly penetrate through the protective gas hood 1410, so that employees will be scalded when they come into contact with the protective gas hood 1410.

[0026] As Figures 3 to 4As shown, a second limiting rod 143 is fixedly connected to the inner wall surface of the limiting sleeve 141. A limiting collar 144 is movably sleeved on the outer surface of the second limiting rod 143. Limiting elastic wires 142 are fixedly connected to the inner wall surfaces on both sides of the limiting sleeve 141. Protective housing shells 146 are fixedly connected to the upper and lower surface of the limiting collar 144. The other ends of the limiting elastic wires 142 are fixedly connected to the outer surface of the protective housing shells 146. A power cord 145 is fixedly installed on the outer surface of the protective housing shell 146. One end of the power cord 145 is movably sleeved on the outer surface of the limiting sleeve 141.

[0027] When the protective gas hood 1410 is lapped on the surface of the precast slab and the power cord 145 is used to energize the protective gas hood 1410, the protective gas hood 1410 can perform welding at a vertical angle. When the protective gas hood 1410 needs to perform welding treatment on precast slabs of different thicknesses, when the protective gas hood 1410 slides on the surface of the precast slab and slightly presses down on the limiting sleeve 141, the limiting collar 144 on the outer surface of one end of the second hydraulic rod 149 slightly flips on the surface of the second limiting rod 143. By using the inclination angle between the protective gas hood 1410 and the precast slab, welding treatment can be performed on precast slabs of different thicknesses, and the shape and size of the molten pool can be controlled, increasing the penetration depth and reducing the oxidation effect on the weld surface.

[0028] As Figures 3 to 7 As shown, a second hydraulic rod 149 is fixedly installed on the inner wall surface at the top of the protective housing shell 146. The output end of the second hydraulic rod 149 is fixedly connected to one end of the protective gas hood 1410. Elastic arms 147 are fixedly connected to the inner wall surfaces on both sides of the protective housing shell 146. The other ends of the elastic arms 147 are fixedly connected to a semi-circular sleeve 148. The inner wall surface of the semi-circular sleeve 148 is movably sleeved on the outer surface of the protective gas hood 1410. A third limiting rod c1 is fixedly connected to the bottom end of the semi-circular sleeve 148. A buffer wire c2 is movably sleeved on the outer surface of the third limiting rod c1. The other ends of the third limiting rod c1 and the buffer wire c2 are fixedly connected to a retractable extrusion scraping strip c3 that is movably sleeved on the inner wall surface of the semi-circular sleeve 148.

[0029] After the protective gas hood 1410 finishes welding, the second hydraulic rod 149 is used to retract the protective gas hood 1410. At this time, the elastic effect of the elastic arm 147 is used to elastically push the semi-circular sleeve 148, and the tip of the semi-circular sleeve 148 is completely attached to the outer surface of the protective gas hood 1410. The forward inclination angle of the retractable extrusion scraping strip c3 is used to squeeze and fit with some slightly adhered molten steel particles on the outer surface of the protective gas hood 1410. As the protective gas hood 1410 continues to retract, some slightly adhered particles are squeezed and peeled off.

[0030] As Figures 1 to 2 andFigure 8 - Figure 9 As shown, a limit track table 12 is movably sleeved on the outer surface of the C-shaped support frame 13. A processing table 11 is fixedly connected to the outer bottom surface of the limit track table 12. A prefabricated steel structure 15 is movably lapped on the top surface of the processing table 11. A threaded hole is provided on the outer surface of the C-shaped support frame 13 at the middle position. Rectangular limit grooves are provided on the outer surface of the C-shaped support frame 13 at the two side edge positions of the threaded hole. A limit sleeve 131 is movably sleeved on the inner wall surface of the rectangular limit groove. A second motor 132 is fixedly installed on the inner wall surface of the limit sleeve 131.

[0031] When the two prefabricated steel structures 15 are lapped on the top surface of the processing table 11, the second motor 132 inside the limit sleeve 131 is rotated, so that the C-shaped support frame 13 performs threaded sliding on the outer surface of the output end of the second motor 132, and the C-shaped support frame 13 slides on the outer surface of the limit sleeve 131, and the first hydraulic rod 14 at one end of the C-shaped support frame 13 is lapped at the joint gap of the two prefabricated steel structures 15 for welding treatment. At the same time, the second motor 132 moves the C-shaped support frame 13 in the horizontal position, and the gaps of different lines can be welded.

[0032] As Figure 1 - Figure 2 and Figures 8 to 9 As shown, a threaded rod is fixedly connected to the output end of the second motor 132. The outer surface of the threaded rod is threadedly movably sleeved on the inner wall surface of the threaded hole. An extrusion fitting arm 135 is fixedly connected to one end surface of the C-shaped support frame 13. A limit card slot 136 is provided at one end of the extrusion fitting arm 135. A resilient push wire 137 is fixedly connected to the tip of the extrusion fitting arm 135. The other end of the resilient push wire 137 is fixedly connected to an extrusion block 138 movably sleeved on the outer surface of the limit card slot 136.

[0033] When the extrusion block 138 at one end of the C-shaped support frame 13 is lapped at the gap of the two prefabricated steel structures 15, the resilient push wire 137 at one end of the extrusion fitting arm 135 is compressed, and the extrusion block 138 contracts on the surface of the extrusion fitting arm 135, so as to change the extension length of the extrusion block 138. When the C-shaped support frame 13 moves on the surface of the prefabricated steel structure 15, the angle at one end of the extrusion block 138 slides on the surface of the prefabricated steel structure 15, and some debris on the surface of the joint gap of the prefabricated steel structure 15 is preferentially cleaned, which is convenient for subsequent welding and fusing efficiency.

[0034] As Figures 1 to 2 and Figure 8 - Figure 9As shown in the figure, on both side surfaces of the limit rail platform 12, a first motor 121 is fixedly installed. A threaded rod 122 is fixedly connected to the output end of the first motor 121 and is movably sleeved on the outer surface of the limit rail platform 12. The outer surface of the threaded rod 122 is threadedly and movably sleeved on the inner wall surface of the limit slider 133. On the inner wall surface of the limit rail platform 12, a first limit rod 123 is provided. A pressing support arm 124 that is movably sleeved on the outer surface of the first limit rod 123 and is movably lapped on the outer surface of the top of the prefabricated steel structure 15 is provided on the outer surface of the first limit rod 123. A limit slider 133 is fixedly connected to one end of the limit sleeve 131. A clamping plate 134 is provided on the bottom surface of the limit slider 133.

[0035] Lap two prefabricated steel structures 15 on the top surface of the processing table 11. At this time, cooperate with the pressing support arm 124 to rotate on the surface of the first limit rod 123, and lap the pressing support arm 124 on the top surface of the prefabricated steel structure 15. At this time, cooperate with the first motor 121 to rotate the threaded rod 122, and make the limit slider 133 slide back and forth on the inner wall surface of the limit rail platform 12. At the same time, cooperate with the clamping plate 134 on the outer bottom surface of the limit slider 133 to support and protect the falling gravity of the limit sleeve 131, avoiding the effect that one end of the limit sleeve 131 is too heavy and causing the C-shaped support frame 13 to tilt during the movement.

[0036] Working principle: When the plasma arc welding head a6 needs to be replaced, cooperate with the hydraulic pump on the bottom surface of the tungsten electrode clamp a1 to push the docking head a2, and make the arc at the bottom surface of the diamond-shaped convex strip a8 push the inner wall surface of the bottom of the diamond-shaped groove a5 to expand to both sides, and make the surface of the diamond-shaped convex strip a8 completely detach from the inner surface of the diamond-shaped groove a5. When there is no block on the top surface of the plasma arc welding head a6, at this time, the vertical protective gas hood 1410 can greatly reduce the friction force with the inner wall surface of the docking groove a7. Then, cooperate with the gravity of the plasma arc welding head a6 itself to automatically detach from the outer surface of the docking head a2, achieving the effect that the plasma arc welding head a6 in the vertical state can greatly reduce the friction force with the surface of the docking head a2, so that the plasma arc welding head a6 can automatically fall off from the surface of the docking head a2, and then achieve the effect of replacing the plasma arc welding head a6. When replacing the new plasma arc welding head a6, the diamond-shaped ridges a8 on the outer surface of the top end of the plasma arc welding head a6 are used to push and squeeze the bottom surface of the clamping block a4 to both sides, so that the clamping block a4 expands to both sides, and the docking groove a7 on the top end of the plasma arc welding head a6 is sleeved on the outer surface of the docking head a2. Due to the tight fit between the docking groove a7 and the diamond-shaped ridges a8, the plasma arc welding head a6 will not tilt excessively at an angle. When the plasma arc welding head a6 tilts slightly, the friction force between the docking groove a7 and the docking head a2 will increase, so that when the protective gas hood 1410 is at an inclined angle, the top end of the plasma arc welding head a6 will not fall off from the outer surface of the docking head a2; When the docking groove a7 is completely clamped onto the outer surface of the docking head a2, the second elastic arm a3 will reset the position of the clamping block a4, and make the diamond-shaped groove a5 on the inner wall surface of the clamping block a4 completely fit on the outer surface of the diamond-shaped ridge a8. When the protective gas hood 1410 is at a vertical angle and the plasma arc welding head a6 drops, the inner wall surface of the diamond-shaped groove a5 will limit the position of the surface of the diamond-shaped ridge a8, and the self-weight of the plasma arc welding head a6 will not generate too much thrust on the surfaces of the clamping block a4 and the second elastic arm a3, and the second elastic arm a3 that is not easily deformed will always effectively position and clamp the plasma arc welding head a6; When the protective gas hood 1410 is lapped on the surface of the precast slab and the power cord 145 is used to energize the protective gas hood 1410, the protective gas hood 1410 can weld at a vertical angle. When the protective gas hood 1410 needs to weld precast slabs of different thicknesses, the protective gas hood 1410 slides on the surface of the precast slab and slightly presses down on the limit sleeve 141, so that the limit collar 144 on the outer surface of one end of the second hydraulic rod 149 slightly flips on the surface of the second limit rod 143. Using the inclined angle between the protective gas hood 1410 and the precast slab, precast slabs of different thicknesses can be welded, and the shape and size of the molten pool can be controlled, increasing the penetration depth and reducing the oxidation of the weld surface;

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A prefabricated steel structure welding device, comprising a C-shaped support frame (13) and a hydraulic rod (14) detachably mounted on the outer surface of the C-shaped support frame (13), characterized in that: The output end of the hydraulic rod 1 (14) is fixedly connected to a limiting sleeve (141), the inner wall surface of the limiting sleeve (141) is provided with a protective gas cover (1410), a hydraulic pump is provided inside the protective gas cover (1410), a docking joint (a2) is fixedly connected to the output end of the hydraulic pump, a tungsten electrode jacket (a1) is fixedly installed on the top inner wall surface of the protective gas cover (1410), and elastic arms 2 (a3) ​​are fixedly connected to the bottom surface of the tungsten electrode jacket (a1) and at the edge positions on both sides of the hydraulic pump. A clamping block (a4) is fixedly connected to one end of the second elastic arm (a3); a rhombus-shaped groove (a5) is provided on the inner wall surface of the clamping block (a4); a plasma arc welding joint (a6) is movably sleeved on the outer surface of the butt joint (a2); a rhombus-shaped convex strip (a8) movably sleeved on the inner wall surface of the rhombus-shaped groove (a5) is provided on the top outer surface of the plasma arc welding joint (a6); and a butt joint groove (a7) tightly fitted on the outer surface of the butt joint (a2) is provided on the top of the plasma arc welding joint (a6).

2. A prefabricated steel structure welding device according to claim 1, characterized in that: A circular groove (a9) is provided on the inner wall surface of the bottom of the diamond-shaped groove (a5), and a groove is provided on the outer surface of the bottom of the diamond-shaped convex strip (a8). An elastic wire (a10) is fixedly connected to the inner wall surface of the groove, and the other end of the elastic wire (a10) is fixedly connected to a circular ball (a11) movably overlapped on the inner wall surface of the circular groove (a9).

3. A prefabricated steel structure welding device according to claim 2, characterized in that: The inner wall surface of the limiting sleeve (141) is fixedly connected to the limiting rod 2 (143), the outer surface of the limiting rod 2 (143) is movably sleeved with a limiting ring (144), the inner wall surfaces on both sides of the limiting sleeve (141) are fixedly connected to limiting elastic wires (142), the upper and lower surfaces of the limiting ring (144) are fixedly connected to a protective sleeve (146), the other end of the limiting elastic wire (142) is fixedly connected to the outer surface of the protective sleeve (146), and the top inner wall surface of the protective sleeve (146) is fixedly installed with a hydraulic rod 2 (149). ), the output end of the second hydraulic rod (149) is fixedly connected to one end of the protective gas hood (1410), the inner wall surfaces on both sides of the protective sleeve (146) are fixedly connected to elastic arms (147), the other end of the elastic arms (147) is fixedly connected to a semicircular sleeve (148), the inner wall surface of the semicircular sleeve (148) is movably sleeved on the outer surface of the protective gas hood (1410), and a power cord (145) is fixedly installed on the outer surface of the protective sleeve (146), and one end of the power cord (145) is movably sleeved on the outer surface of the limiting sleeve (141).

4. A prefabricated steel structure welding device according to claim 3, characterized in that: The bottom end of the semicircular sleeve (148) is fixedly connected to a limiting rod three (c1), the outer surface of the limiting rod three (c1) is movably sleeved with a buffer wire (c2), and the other ends of the limiting rod three (c1) and the buffer wire (c2) are fixedly connected to an inwardly retracted extrusion scraper (c3) movably sleeved on the inner wall surface of the semicircular sleeve (148).

5. A prefabricated steel structure welding device according to claim 4, characterized in that: One end of the tungsten electrode jacket (a1) is fixedly connected to the top outer surface of the hydraulic pump, and the clamping block (a4) is horizontally arranged at the edge positions on both sides of the docking joint (a2).

6. The prefabricated steel structure welding device according to claim 1, characterized in that: The plasma arc welding joint (a6) is arranged on the inner wall surface of the protective gas hood (1410), and a cavity is arranged between the plasma arc welding joint (a6) and the protective gas hood (1410).

7. A prefabricated steel structure welding device according to claim 6, characterized in that: A limiting track platform (12) is movably sleeved on the outer surface of the C-shaped support frame (13), a processing platform (11) is fixedly connected to the bottom outer surface of the limiting track platform (12), and a prefabricated steel structure (15) is movably overlapped on the top surface of the processing platform (11).

8. A prefabricated steel structure welding device according to claim 7, characterized in that: A threaded hole is provided on the outer surface of the C-shaped support frame (13) and at a middle position, and rectangular limit grooves are provided on the outer surface of the C-shaped support frame (13) and at the two side edge positions of the threaded hole, a limit sleeve (131) is movably sleeved on the inner side wall of the rectangular limit groove, and a second motor (132) is fixedly mounted on the inner side wall of the limit sleeve (131).

9. A prefabricated steel structure welding device according to claim 8, characterized in that: A threaded rod is fixedly connected to the output end of the second motor (132), and the outer surface of the threaded rod is threadedly movably sleeved on the inner wall surface of the threaded hole. A limiting slider (133) is fixedly connected to one end of the limiting sleeve (131), and a clamping plate (134) is provided on the bottom surface of the limiting slider (133). An extrusion fitting arm (135) is fixedly connected to the surface of one end of the C-shaped support frame (13), and a limiting clamping groove (136) is provided on one end of the extrusion fitting arm (135). An elastic push wire (137) is fixedly connected to the tip of the extrusion fitting arm (135), and an extrusion block (138) movably sleeved on the outer surface of the limiting clamping groove (136) is fixedly connected to the other end of the elastic push wire (137).

10. A prefabricated steel structure welding device according to claim 9, characterized in that: A motor 1 (121) is fixedly mounted on both side surfaces of the limit track platform (12); a threaded rod (122) movably sleeved on the outer surface of the limit track platform (12) is fixedly connected to the output end of the motor 1 (121); the outer surface of the threaded rod (122) is threadedly sleeved on the inner wall of the limit slider (133); a limit rod 1 (123) is provided on the inner wall of the limit track platform (12); a downward pressing support arm (124) movably overlapped on the outer surface of the top of the prefabricated steel structure (15) is movably sleeved on the outer surface of the limit rod 1 (123).

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