Automatic welding machine for assembling ring pipe flanges

Abstract

The utility model relates to the technical field of fire-fighting spraying, in particular to an automatic welding machine for assembling ring pipe flanges. Comprising a fixing base, a sliding way is arranged on the fixing base in the length direction, two sliding bases slide on the sliding way, rotating machine heads are arranged at the tops of the sliding bases respectively, annular positioning welding mechanisms used for fixing flanges are arranged on the rotating machine heads, and a bracket used for containing an arc-shaped pipe is arranged on one side of the fixing base. And a connecting hole positioning assembly is arranged in the annular positioning welding mechanism. The annular positioning and welding mechanism welds the flanges and the ends of the arc-shaped pipes, it is guaranteed that flange assembly welding connecting hole sites of the annular pipes are coaxial, the end faces of the flanges at the two ends of the annular pipes are perpendicular to the center passing line, and it is guaranteed that after single-section assembly automatic welding is conducted, the complete spraying annular pipes are formed, and the water leakage situation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to an automatic welding machine for annular pipe flange assemblies. Background Art

[0002] In the field of petrochemical industry, spherical tanks, storage tank towers and fire sprinkler devices are essential firefighting equipment. However, due to the different diameters of tanks during the manufacturing process, the ring pipe and flange cannot be mechanized for welding in the production of fire sprinkler ring pipes. They can only be formed into a full circle or semicircle by manually drawing ground samples or making positioning jigs. The entire ring pipe is divided into several arc pipes, and the flanges are welded at the ends of the arc pipes. Due to the different diameters of the tank ring pipes and site restrictions, a large amount of labor and material costs are wasted, the construction period is delayed, etc., and when manual welding is used, the welding process cannot ensure that the flange group of the arc pipe is coaxial with the welding connection hole position, and the flange end faces at both ends of the arc pipe are perpendicular to the center line. After the entire ring pipe is connected, the flange may be offset, and it cannot be connected into a circle or leak after connection. Utility Model Content

[0003] The utility model aims to solve the above problems, thereby providing an automatic welding machine for annular pipe flange assembly which can ensure accurate flange welding.

[0004] The utility model solves the above problems and adopts the following technical solutions:

[0005] The invention discloses an automatic welding machine for annular pipe flange assembly, comprising a fixed seat, a slideway is arranged on the fixed seat along the length direction, two slide seats slide on the slideway, rotating heads are arranged on the top of the slide seats respectively, an annular positioning welding mechanism for fixing the flange is arranged on the rotating head, a bracket for placing an arc pipe is arranged on one side of the fixed seat, and a connecting hole positioning component is arranged in the annular positioning welding mechanism.

[0006] Compared with the prior art, the utility model adopting the above technical solution has the following outstanding features:

[0007] Fix the flange in the circumferential positioning welding mechanism, and the connecting hole positioning assembly ensures that the connecting holes of each flange are coaxial. The spray ring pipe is divided into several sections of ring pipes according to different diameters. The parameters of each arc pipe section are obtained according to the drawings. The arc pipe is placed on the bracket, and the spacing of the slides is adjusted according to the drawings and the rotating head is rotated so that the end of the arc pipe is inserted into the flange. When the flange is accurately positioned, the circumferential positioning welding mechanism welds the flange to the end of the arc pipe to ensure that the welding connecting holes of the flange group of the ring pipe are coaxial, and the end faces of the flanges at both ends of the ring pipe are perpendicular to the centerline, so that after the single-section group is automatically welded, a complete spray ring pipe is formed without leakage.

[0008] As a preferred embodiment, a further technical solution of the utility model is:

[0009] Further, a scale is provided on the sliding seat and on the outer periphery of the rotating head.

[0010] Further, the rotating shaft of the rotating head is perpendicular to the sliding track.

[0011] Further, the circumferential positioning welding mechanism includes a fixing rod fixed to the rotating head. A positioning ring is integrally formed at the top of the fixing rod. Positioning components are arranged at intervals along the circumferential direction on the outer periphery of the middle part of the positioning ring. An external gear disk is slidably connected along the circumferential direction on both sides of the positioning components on the outer periphery of the positioning ring. A frame body is arranged on the rotating head. A motor is arranged on the frame body. Two driving gears are sleeved on the output shaft of the motor. The two driving gears are meshed with the two external gear disks relatively. A welding torch extending towards the connection part of the flange and the arc-shaped pipe is arranged on the side of the external gear disk facing away from the positioning ring.

[0012] Further, the positioning component includes a cylinder penetrating through the positioning ring at intervals. The output direction of the cylinder is perpendicular to the axis of the positioning ring.

[0013] Further, a limiting block is arranged at the output end of the cylinder.

[0014] Further, the connection hole positioning component includes a positioning plate fixed on the inner wall of the positioning ring and on the side away from the arc-shaped pipe. The end of the positioning plate extends towards the axis direction of the positioning ring. A positioning hole for cooperating with a plurality of connection holes is arranged along the length direction on the positioning plate. A positioning pin is detachably connected in the positioning hole.

[0015] Further, a positioning strip extending towards the axis direction of the positioning ring is arranged on the external gear disk on the side away from the arc-shaped pipe. A telescopic rod is fixed on the positioning strip. The telescopic rod is parallel to the axis of the positioning ring. The end of the telescopic rod penetrates through the positioning block and abuts against the pipe wall of the arc-shaped pipe.

[0016] Further, a sliding rod perpendicular to the axis of the positioning ring is arranged on the side of the external gear disk facing away from the positioning ring. A sliding block is slidably sleeved on the sliding rod. The sliding block is fixed to the welding torch. A locking bolt opposite to the sliding rod penetrates through the sliding block. Description of the Drawings

[0017] Figure 1 It is a schematic side view structure diagram of the circumferential positioning welding mechanism of the embodiment of the present utility model;

[0018] Figure 2 It is a schematic front view structure diagram of the circumferential positioning welding mechanism of the embodiment of the present utility model;

[0019] Figure 3 It is a schematic top view relative structure diagram of the embodiment of the present utility model;

[0020] The markings in the figure are: fixed seat 1, slideway 2, sliding seat 3, rotating head 4, bracket 5, fixed rod 6, positioning ring 7, external gear disc 8, motor 9, driving gear 10, welding torch 11, cylinder 12, limit block 13, positioning plate 14, positioning pin 15, slide bar 16, slider 17, telescopic rod 18, positioning strip 19. Specific embodiments

[0021] The present utility model will be further described below in conjunction with embodiments, and the purpose is only to better understand the content of the present utility model. Therefore, the examples given do not limit the protection scope of the present utility model.

[0022] An automatic welding machine for circumferential flange butt welding. The flange butt hole is the position where the pipeline is welded to the flange, and the flange connection hole is the bolt connection hole between two adjacent flanges. It includes a fixed seat 1. A slideway 2 is arranged along the length direction on the fixed seat 1. Two sliding seats 3 slide on the slideway 2. Rotating heads 4 are respectively arranged on the tops of the sliding seats 3. A driving motor for driving the rotating head 4 to rotate is arranged in the sliding seat 3. A circumferential positioning welding mechanism for fixing the flange is arranged on the rotating head 4. A bracket 5 for placing the arc-shaped pipe is arranged on one side of the fixed seat 1. A connection hole positioning component is arranged in the circumferential positioning welding mechanism.

[0023] Further, a scale is arranged on the sliding seat 3 and on the outer periphery of the rotating head 4. Through the scale, the rotation angle of the rotating head 4 can be accurately observed and adjusted.

[0024] Further, the rotating shaft of the rotating head 4 is perpendicular to the slideway 2.

[0025] Further, the circumferential positioning welding mechanism includes a fixed rod 6 fixed to the rotating head 4. A positioning ring 7 is integrally formed at the top of the fixed rod 6. Positioning components are arranged at intervals along the circumferential direction on the outer periphery of the middle part of the positioning ring 7. An external gear disc 8 is slidably connected along the circumferential direction on the outer periphery of the positioning ring 7 and on both sides of the positioning components. A frame body is arranged on the rotating head 4. A motor 9 is arranged on the frame body. The rotating head 4 drives the motor 9 to move synchronously with the positioning ring 7. Two driving gears 10 are sleeved on the output shaft of the motor 9. The two driving gears 10 are meshed with the two external gear discs 8 respectively. A welding torch 11 extending towards the connection position of the flange and the arc-shaped pipe is arranged on the side of the external gear disc 8 facing away from the positioning ring 7. The two welding torches 11 are respectively opposite to the outer side and the inner side of the flange and the welding position of the arc-shaped pipe. The motor 9 drives the driving gear 10 to rotate, thereby driving the external gear disc 8 to rotate, and further driving the welding torch 11 to rotate to weld the welding position circumferentially.

[0026] Further, the positioning component includes cylinders 12 penetrating through the positioning ring 7 at intervals. The output direction of the cylinders 12 is perpendicular to the axis of the positioning ring 7. The flange is placed in the middle of the positioning ring 7, and multiple cylinders 12 extend together to clamp and fix the flange.

[0027] Further, a limiting block 13 is provided on the output end of the cylinder 12.

[0028] Further, the connection hole positioning assembly includes a positioning plate 14 fixed on the inner wall of the positioning ring 7 and away from the arc-shaped pipe side. The end of the positioning plate 14 extends towards the axis direction of the positioning ring 7. A positioning hole for cooperating with a plurality of connection holes is provided along the length direction of the positioning plate 14. A positioning pin 15 is detachably connected in the positioning hole. For flanges of different sizes, different positioning holes are selected. The positioning pin 15 passes through the positioning hole and the connection hole to position the connection hole, preventing the connection hole positions of adjacent flanges from being non-coaxial.

[0029] Further, a positioning strip 19 extending towards the axis direction of the positioning ring 7 is provided on the outer tooth disc 8 away from the arc-shaped pipe side. A telescopic rod 18 is fixed on the positioning strip 19. The telescopic rod 18 is parallel to the axis of the positioning ring 7. The end of the telescopic rod 18 penetrates through the positioning block 19 and abuts against the pipe wall of the arc-shaped pipe. The telescopic rod 18 does not interfere with the welding torch 11 on the same side. The two ends of the arc-shaped pipe are limited by using the telescopic rod 18. The depth of the telescopic rod 18 extending into the flange docking hole is determined according to the preset depth of the arc-shaped pipe extending into the flange, so that the position of the arc-shaped pipe remains centered.

[0030] Further, a slide rod 16 perpendicular to the axis of the positioning ring 7 is provided on the side of the outer tooth disc 8 facing away from the positioning ring 7. A slider 17 is slidably sleeved on the slide rod 16. The slider 17 is fixed to the welding torch 11. A locking bolt opposite to the slide rod 16 penetrates through the slider 17. The position of the welding torch 11 is adjusted by the slider 17 to match different flanges, and the slider 17 is limited by tightening the locking bolt.

[0031] The flange is fixed in the positioning ring 7 by the cylinder 12. The positioning hole of the positioning plate 14 is aligned with the connection hole of the flange and the positioning pin 15 is inserted. The fixed position of the positioning plate 14 ensures that the connection hole positions of each flange are coaxial. The spray ring pipe with different diameters is divided into several sections of annular pipes. The parameters of each section of the arc-shaped pipe are obtained according to the drawing. The arc-shaped pipe is placed on the bracket 5. The distance between the sliding seats 3 is adjusted according to the drawing and the rotating head is rotated so that the end of the arc-shaped pipe is inserted into the flange exactly. The end of the arc-shaped pipe is limited by the telescopic rod 18 to ensure the centering of the arc-shaped pipe. When the flange is accurately positioned, the motor 9 drives the driving gear 10 and then drives the outer tooth disc 8 to rotate. The outer tooth disc 8 drives the two welding torches 11 to rotate to weld the flange and the end of the arc-shaped pipe, ensuring that the connection hole positions of the flange group of the annular pipe are coaxial. The end faces of the flanges at both ends of the annular pipe are perpendicular to the center line, ensuring that after the single-section group is automatically welded, a complete spray ring pipe is formed and no water leakage occurs.

[0032] The above are only the preferred and feasible embodiments of the present utility model, and thus do not limit the scope of rights of the present utility model. Any equivalent changes made by using the content of the specification and drawings of the present utility model are included within the scope of rights of the present utility model.

Claims

1. An automatic welding machine for annular pipe flange assembly, characterized in that: It includes a fixed seat, a slideway is arranged on the fixed seat along the length direction, two slides slide on the slideway, rotating heads are arranged on the top of the slides, an annular positioning welding mechanism for fixing the flange is arranged on the rotating head, a bracket for placing the arc tube is arranged on one side of the fixed seat, and a connecting hole positioning component is arranged in the annular positioning welding mechanism.

2. The automatic welding machine for annular pipe flange assembly according to claim 1 is characterized in that: A scale is arranged on the slide seat and located on the outer periphery of the rotating machine head.

3. The automatic welding machine for annular pipe flange assembly according to claim 1 is characterized in that: The rotation axis of the rotating head is perpendicular to the slideway.

4. The automatic welding machine for annular pipe flange assembly according to claim 1 is characterized in that: The circumferential positioning welding mechanism includes a fixing rod fixed to a rotating machine head, a positioning ring is integrally formed on the top of the fixing rod, positioning components are arranged at intervals along the circumferential direction on the middle outer periphery of the positioning ring, and external toothed discs are slidably connected along the circumferential direction on the outer periphery of the positioning ring and on both sides of the positioning component. A frame is arranged on the rotating machine head, and a motor is arranged on the frame. Two driving gears are mounted on the output shaft of the motor, and the two driving gears are relatively meshed with the two external toothed discs. A welding gun extending to the connection between the flange and the arc tube is arranged on the side of the external toothed disc away from the positioning ring.

5. The automatic welding machine for annular pipe flange assembly according to claim 4 is characterized in that: The positioning assembly comprises a cylinder which is spaced and penetrates the positioning ring, and the output direction of the cylinder is perpendicular to the axis of the positioning ring.

6. The automatic welding machine for annular pipe flange assembly according to claim 5, characterized in that: A limit block is arranged on the output end of the cylinder.

7. The automatic welding machine for annular pipe flange assembly according to claim 4, characterized in that: The connecting hole positioning assembly includes a positioning plate fixed on the inner wall of the positioning ring and away from the side of the arc tube. The end of the positioning plate extends toward the axial direction of the positioning ring. The positioning plate is provided with positioning holes along the length direction for use with a plurality of connecting holes. A positioning pin is detachably connected to the positioning hole.

8. The automatic welding machine for annular pipe flange assembly according to claim 4, characterized in that: A positioning strip extending toward the axis of the positioning ring is arranged on the outer gear disc away from the arc tube. A telescopic rod is fixed on the positioning strip. The telescopic rod is parallel to the axis of the positioning ring. The end of the telescopic rod passes through the positioning block and abuts against the wall of the arc tube.

9. The automatic welding machine for annular pipe flange assembly according to claim 4, characterized in that: A slide bar perpendicular to the axis of the positioning ring is arranged on the side of the outer gear disc away from the positioning ring. A slider is slidably sleeved on the slide bar. The slider is fixed to the welding gun. A locking bolt opposite to the slide bar is passed through the slider.

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