Automatic welding machine for valve body

Abstract

The invention discloses an automatic welding machine for a valve body, which is used for welding the valve body and comprises a support rotating device for keeping the valve body axially horizontal and driving the valve body to rotate; the welding device is used for welding circular welding seams between the valve body of the valve body and the connecting pipes at the two ends of the valve body; the welding device comprises a welding mechanism. The welding mechanism comprises a welding frame, a welding gun assembly, a welding wire supply assembly and a welding gun adjusting assembly. The welding frame and the valve body are arranged in parallel; the welding gun assembly comprises a welding gun and a welding wire gun; the welding wire supply assembly is used for supplying welding wires to the welding wire gun; the welding gun adjusting assembly is located between the welding frame and the welding gun assembly and used for adjusting the position and the inclination angle of the welding gun relative to the valve body. In the welding process, automatic welding is achieved, manual welding is not needed, the welding efficiency is high, and the production efficiency is high.

Description

Technical Field

[0001] This invention relates to the technical field of valve body welding, and in particular to an automatic valve body welding machine. Background Technology

[0002] The valve bodies of butterfly valves, ball valves, and check valves have irregular shapes, with valve stems, sleeves (connecting pipes), and flanges. The space for welding these parts is limited, but the valve body walls are very thick, resulting in a large amount of welding. In the market, manual welding with electric welding rods is commonly used, which is labor-intensive and requires welders with extremely strong welding experience. This is not conducive to improving valve body production efficiency. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides an automatic valve body welding machine, which has the advantages of automatic welding and high production efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An automatic valve body welding machine for welding valve bodies includes: A support and rotation device is used to keep the valve body axially horizontal and drive the valve body to rotate. Welding apparatus for welding the circumferential weld between the valve body and the connecting pipes at both ends of the valve body; The welding device includes a welding mechanism; the welding mechanism includes a welding frame, a welding torch assembly, a welding wire supply assembly, and a welding torch adjustment assembly; the welding frame is arranged parallel to the valve body; the welding torch assembly includes a welding torch and a welding wire torch; the welding wire supply assembly supplies welding wire to the welding wire torch; the welding torch adjustment assembly is located between the welding frame and the welding torch assembly and is used to adjust the position and tilt angle of the welding torch relative to the valve body.

[0005] By adopting the above technical solution, the valve body, which is pre-spot welded together, is placed on the support and rotation device. Then, the position and tilt angle of the welding torch relative to the valve body are adjusted by the welding torch adjustment component so that the welding torch is directly facing the circular weld seam. Next, the support and rotation device drives the valve body to rotate. During this process, the welding wire supply component supplies welding wire to the welding wire torch so that the welding wire can reach the circular weld seam. At the same time, the welding torch performs welding. When the support and rotation device drives the valve body to rotate one revolution, the welding torch completes the welding of the circular weld seam. The welding process is automatic, without the need for manual welding, resulting in high welding efficiency and high production efficiency.

[0006] Optionally, the support rotation device includes a support rotation mechanism; the support rotation mechanism includes a support rotation seat, a three-jaw chuck, and a pair of auxiliary support components; the support rotation seat is provided with a rotation component; the rotation component drives the three-jaw chuck to rotate; the pair of auxiliary support components are distributed along the axial direction of the three-jaw chuck; the auxiliary support component includes an auxiliary support frame; the pair of auxiliary support frames respectively support a pair of connecting pipes.

[0007] By adopting the above technical solution, the valve body, which is pre-spot-welded into one piece, is placed on a pair of auxiliary support components. At this time, a pair of connecting pipes are respectively located on the auxiliary support frames of the pair of auxiliary support components. Then, the three-jaw chuck clamps the adjacent connecting pipes, and the rotating component drives the three-jaw chuck to rotate, thereby driving the valve body to rotate as a whole. Since a pair of auxiliary support components are used to support the valve body, the position of the valve body is more stable.

[0008] Optionally, the supporting rotating seat is provided with a main lifting assembly; the main lifting assembly is used to drive the three-jaw chuck and the rotating assembly to lift synchronously; the auxiliary support assembly also includes an auxiliary lifting component; the auxiliary lifting component is used to drive the auxiliary support frame to lift; the main lifting assembly and a pair of auxiliary lifting components work together to adapt to valve bodies with different set diameters.

[0009] By adopting the above technical solution, when the size of the welding target changes, the height of the three-jaw chuck and a pair of auxiliary support frames can be changed through the main lifting assembly and a pair of auxiliary lifting components, thereby adapting to valve bodies with different set diameters, thus making the welding machine more adaptable.

[0010] Optionally, the auxiliary support frame includes a support frame body and a pair of rollers; the upper end of the support frame body is provided with a V-shaped mounting groove; the pair of rollers are rotatably connected to the support frame body and are symmetrically arranged with respect to the center of symmetry of the mounting groove; the rollers abut against the outer cylindrical surface of the connecting pipe.

[0011] By adopting the above technical solution, the V-shaped mounting groove can accommodate the placement of connecting pipes of different diameters, and the presence of a pair of rollers is conducive to the rotation of the connecting pipes; the pair of rollers are rotatably connected to the main body of the support frame and are symmetrically arranged with respect to the center of symmetry of the mounting groove, which is also conducive to accommodating connecting pipes of different diameters.

[0012] Optionally, the welding torch adjustment assembly includes a welding torch support, a long-distance drive, a vertical plane rotation drive, and a short-distance drive; the long-distance drive is disposed between the welding frame and the welding torch support; the long-distance drive is used to drive the welding torch support to move in a vertical plane parallel to the valve body axis and to cause the welding torch assembly to move between the two annular weld seams of the valve body; the vertical plane rotation drive is disposed on the welding torch support and is used to drive the short-distance drive to rotate in a vertical plane; the short-distance drive is used to drive the welding torch assembly to move along the XYZ axes and rotate in a vertical plane parallel to the valve body axis.

[0013] By adopting the above technical solution, when adjusting the position of the welding torch, the long-distance drive component moves the welding torch support seat in a vertical plane parallel to the valve body axis. That is, the welding torch support seat is adjusted in both the horizontal and vertical directions parallel to the valve body axis, so that the welding torch assembly is closer to the circular weld seam. Then, the short-distance drive component makes the welding torch assembly finely adjusted along the XYZ three axes, so that the position of the welding torch assembly is more accurate. Then, the short-distance drive component makes the welding torch assembly rotate in a vertical plane parallel to the valve body axis, so that the welding torch assembly is more suitable for narrow operating spaces.

[0014] Optionally, the end of the short-distance drive component is provided with a horizontal plane rotating component; the horizontal plane rotating component is used to drive the welding torch assembly to rotate on the horizontal plane so that when welding two circular weld seams, the working end of the welding torch assembly is facing the valve body.

[0015] By adopting the above technical solution, the working ends of the horizontal rotating component and the welding gun assembly are all oriented towards the valve body, which can avoid interference between the welding gun assembly and the valve body, so as to complete the welding of the two circular weld seams.

[0016] Optionally, the horizontal rotating component includes a horizontal rotating seat and a pair of vertically distributed limiting bolts; the welding torch assembly includes a vertically arranged vertical connecting rod rotatably connected to the horizontal rotating seat; the limiting bolts are screwed onto the horizontal rotating seat and have sliding columns formed on their inner ends; a pair of vertically distributed coaxially arranged limiting ring grooves are formed on the vertical connecting rod; the limiting ring grooves correspond one-to-one with the sliding columns and allow the corresponding sliding columns to slide in a 180-degree arc; the pair of sliding columns simultaneously reach both ends of the corresponding limiting ring grooves.

[0017] By adopting the above technical solution, after the welding torch assembly has welded one of the circular weld seams, a pair of limiting bolts can be loosened to separate the sliding column from the bottom of the limiting ring groove. This allows the vertical connecting rod to rotate, meaning the welding torch assembly can rotate on the horizontal plane. At the same time, due to the indication of the limiting ring groove, the welding torch assembly cannot continue to rotate after rotating 180 degrees. This allows for precise control of the final position of the welding torch assembly. In addition, a pair of vertically distributed limiting bolts and a pair of vertically distributed limiting ring grooves make the rotation of the vertical connecting rod more stable.

[0018] Optionally, the horizontal rotating component includes a horizontal rotating base and a motorized drive component; the motorized drive component includes a power drive component and a transmission structure; the welding torch assembly includes a vertically arranged vertical connecting rod rotatably connected to the horizontal rotating base; the power drive component drives the vertical connecting rod to reciprocate 180 degrees through the transmission structure.

[0019] By adopting the above technical solution, the power drive component drives the vertical connecting rod to rotate 180 degrees back and forth through the transmission structure, that is, the welding gun assembly rotates 180 degrees back and forth on the horizontal plane. This eliminates the need for manual operation, and the welding gun assembly can switch directions more quickly, thereby improving welding efficiency.

[0020] Optionally, it also includes an argon supply device and an argon providing device; the argon supply device supplies argon to the argon providing device; the argon providing device is used to replenish argon to the inside of the valve body.

[0021] By adopting the above technical solution, the argon supply device is used to supply argon gas into the valve body, thus providing better protection.

[0022] Optionally, the welding torch may be a curved torch.

[0023] By adopting the above technical solution, the welding torch adopts a curved torch structure and the tilt angle of the welding torch is adjustable, which makes it convenient for the welding torch to penetrate into the welding position. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the valve body of the present invention.

[0025] Figure 2 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0026] Figure 3 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0027] Figure 4 This is a schematic diagram of the support rotation device according to Embodiment 1 of the present invention.

[0028] Figure 5 This is a schematic diagram of the welding apparatus according to Embodiment 1 of the present invention.

[0029] Figure 6 This is a structural schematic diagram of the short-distance drive component and welding torch assembly according to Embodiment 1 of the present invention.

[0030] Figure 7 This is a schematic diagram of the argon gas supply device according to Embodiment 1 of the present invention.

[0031] Figure 8 This is a schematic diagram of the structure of the horizontal plane rotating component and welding torch assembly according to Embodiment 2 of the present invention.

[0032] Figure 9 This is a schematic diagram of a partial cross-section of the horizontal rotating component according to Embodiment 2 of the present invention.

[0033] Figure 10 This is the invention Figure 9 A magnified structural diagram of part A in the diagram.

[0034] Figure 11 This is a structural schematic diagram of a horizontal plane rotating component and welding torch assembly with a cross-section, according to Embodiment 3 of the present invention.

[0035] Figure 12 This is the invention Figure 11 A magnified schematic diagram of a portion of the structure.

[0036] Explanation of reference numerals in the attached figures: 10. Valve body; 11. Valve body itself; 12. Valve stem; 13. Connecting pipe; 20. Support for the rotating device; 30. First base; 40. Supporting rotating mechanism; 41. Supporting rotating seat; 42. Three-jaw chuck; 43. Auxiliary support assembly; 431. Lifting electric cylinder; 432. Support frame body; 433. Rollers; 434. Pallet; 50. Welding equipment; 60. Second base; 70. Welding mechanism; 71. Welding frame; 72. X-axis sliding seat; 73. Z-axis support seat; 74. Welding torch support seat; 741. Sliding seat; 742. Support cantilever; 75. Welding wire guide; 76. Short-distance drive component; 761. Gear motor; 762. Z-axis drive cylinder; 7621. Z-axis slide; 763. X-axis drive cylinder; 7631. X-axis slide; 764. Y-axis drive cylinder; 7641. Y-axis slide; 7642. Horizontal rotating seat 7643. Upper support frame; 7644. Side support seat; 77. Welding torch assembly; 771. Vertical connecting rod; 7710. Limiting ring groove; 772. Combined support frame; 773. Welding torch; 774. Welding wire torch; 78. Limiting bolt; 781. Sliding column; 79. Motorized drive component; 791. Rotary cylinder; 792. First transmission gear; 793. Second transmission gear; 794. Transmission center shaft; 795. Third transmission gear; 796. Fourth transmission gear; 80. Electrical control box; 90. Argon supply device; 91. Mobile trolley; 92. Vertical column; 93. Horizontal connection assembly; 94. Horizontal extension rod; 95. Argon nozzle; 100. Welding wire feeder; 110. Argon gas supply device. Detailed Implementation

[0037] The following is in conjunction with the appendix Figures 1-12 The present invention will be described in further detail below.

[0038] Example 1: An automatic valve body welding machine is disclosed for welding valve body 10, see reference. Figure 1 The valve body 10 includes a valve body 11 and a pair of connecting pipes 13. The valve body 11 has flanges at both ends and valve stems 12 are mounted thereon. When welding with a welding machine, the pair of connecting pipes 13 are fixed to the axial ends of the valve body 11 by spot welding. (Reference) Figure 2 and Figure 3 The welding machine includes a support and rotation device 20, a welding device 50, and an argon gas supply device 90. The support and rotation device 20 is used to keep the valve body 10 axially horizontal and drive the valve body 10 to rotate. The welding device 50 is used to weld the annular weld between the valve body body 11 of the valve body 10 and the connecting pipes 13 at both ends. The argon gas supply device 90 is used to supply argon gas into the valve body 10. The argon gas supplied by the argon gas supply device 90 and the argon gas sprayed by the welding gun work together to provide better protection during welding.

[0039] refer to Figures 2-4The supporting rotation device 20 includes a first base 30 and a supporting rotation mechanism 40; the supporting rotation mechanism 40 is fixed on the first base 30. The supporting rotation mechanism 40 includes a supporting rotation seat 41, a three-jaw chuck 42, and a pair of auxiliary support components 43; the three-jaw chuck 42 is rotatably connected to the supporting rotation seat 41 and is axially horizontal; a rotation component is provided inside the supporting rotation seat 41; the rotation component drives the three-jaw chuck 42 to rotate; the rotation component can be a motor, hydraulic motor, pneumatic motor, etc.; the pair of auxiliary support components 43 are distributed along the axial direction of the three-jaw chuck 42.

[0040] refer to Figure 4 The auxiliary support assembly 43 includes an auxiliary support frame and an auxiliary lifting component. The auxiliary lifting component is used to drive the auxiliary support frame to move vertically. The auxiliary support frame includes a support frame body 432 and a pair of rollers 433. A V-shaped mounting groove is provided at the upper end of the support frame body 432. The pair of rollers 433 are rotatably connected to the support frame body 432 and are symmetrically arranged with respect to the center of symmetry of the mounting groove. The rollers 433 abut against the outer cylindrical surface of the connecting pipe 13. The auxiliary lifting component includes a pair of lifting electric cylinders 431 distributed vertically along the axial direction of the valve body 10. Of course, the auxiliary lifting component can also be a pneumatic cylinder or a hydraulic cylinder. The pair of lifting electric cylinders 431 are fixed on the first base 30. The support frame body 432 is fixed on the upper end of the piston rod of the pair of lifting electric cylinders 431. In order to collect welding slag, trays 434 are respectively provided on the side of the housing of the two pairs of lifting electric cylinders 431 that are close to each other.

[0041] To coordinate with the auxiliary lifting components, a main lifting assembly is installed inside the support rotating base 41. The main lifting assembly drives the three-jaw chuck 42 and the rotating assembly to lift synchronously. The main lifting assembly can be a vertically arranged pneumatic cylinder, electric cylinder, or hydraulic cylinder. The entire welding machine can be equipped with a controller and a display. The controller is set with drive programs adapted to several different diameter valve bodies 10. The operator can select the corresponding drive program according to the actual diameter of the valve body 10 being welded, thereby controlling the main lifting assembly and a pair of auxiliary lifting components to start. It also controls the support rotating device 20, welding device 50, and argon gas supply device 90 to perform corresponding actions.

[0042] refer to Figure 5 The welding device 50 includes a second base 60 and a welding mechanism 70; the welding mechanism 70 is mounted and fixed on the second base 60; the welding mechanism 70 includes a welding frame 71, a welding torch assembly 77, a welding wire supply assembly, and a welding torch adjustment assembly; wherein the welding frame 71 is a gantry frame and is arranged parallel to the axial direction of the valve body 10; the welding torch adjustment assembly is located between the welding frame 71 and the welding torch assembly 77 and is used to adjust the position and tilt angle of the welding torch assembly 77 relative to the valve body 10; wherein the second base 60 is fixed with an electrical control box 80 and an argon gas supply device 110.

[0043] refer to Figure 5 The welding torch adjustment assembly includes a welding torch support 74, a long-distance drive component, a vertical plane rotation drive component, and a short-distance drive component 76. The long-distance drive component is disposed between the welding frame 71 and the welding torch support 74. The long-distance drive component is used to drive the welding torch support 74 to move in a vertical plane parallel to the axial direction of the valve body 10 and to cause the welding torch assembly 77 to move between the two annular weld seams of the valve body 10. The vertical plane rotation drive component is disposed on the welding torch support 74 and is used to drive the short-distance drive component 76 to rotate in a vertical plane. The short-distance drive component 76 is used to drive the welding torch assembly 77 to move along the XYZ axes and to rotate in a vertical plane parallel to the axial direction of the valve body 10.

[0044] refer to Figure 5 The long-distance drive unit includes an X-axis sliding seat 72, an X-axis sliding drive, a Z-axis support seat 73, and a Z-axis sliding drive. The X-axis sliding drive drives the X-axis sliding seat 72 to slide horizontally on the welding frame 71. The sliding direction of the X-axis sliding seat 72 is parallel to the axial direction of the valve body 10. The X-axis sliding drive can be composed of a motor and a gear and rack mechanism, or a motor and a sprocket and chain mechanism. The Z-axis sliding drive drives the welding torch support seat 74 to slide vertically on the Z-axis support seat 73. The Z-axis sliding drive can be composed of a motor and a gear and rack mechanism, or a motor and a sprocket and chain mechanism. The welding torch support seat 74 includes a sliding seat 741 and a support cantilever 742 horizontally fixed on the sliding seat 741. The sliding seat 741 moves vertically on the Z-axis support seat 73. In this way, the X-axis sliding drive and the Z-axis sliding drive can make the welding torch assembly 77 approach the annular weld seam between the valve body 11 and the pair of connecting pipes 13, respectively.

[0045] refer to Figure 6 The vertical rotation drive is fixed at the end of the support cantilever 742 away from the sliding seat 741. The vertical rotation drive can be a geared motor 761, a rotary cylinder, or a rotary hydraulic motor. The vertical rotation drive drives the welding torch assembly 77 to rotate on the vertical plane, so that the welding torch assembly 77 can adapt to a narrower operating space.

[0046] refer to Figure 6The short-distance drive component 76 includes a Z-axis drive cylinder 762, an X-axis drive cylinder 763, and a Y-axis drive cylinder 764. The Z-axis drive cylinder 762 is fixed on the output shaft of the geared motor 761. The X-axis drive cylinder 763 is fixed on the Z-axis slide 7621 of the Z-axis drive cylinder 762. The Y-axis drive cylinder 764 is fixed on the X-axis slide 7631 of the X-axis drive cylinder 763. The welding torch assembly 77 is fixed on the Y-axis slide 7641 of the Y-axis drive cylinder 764. Of course, the Z-axis drive cylinder 762, X-axis drive cylinder 763, and Y-axis drive cylinder 764 can also be replaced by pneumatic cylinders and / or hydraulic cylinders. In this way, by fine-tuning the Z-axis drive cylinder 762, X-axis drive cylinder 763, and Y-axis drive cylinder 764, the welding torch assembly 77 can be brought closer to the annular weld seam between the valve body 11 and the pair of connecting pipes 13.

[0047] refer to Figure 6 The welding torch assembly 77 includes a vertical connecting rod 771, a combined support frame 772, a welding torch 773, and a welding wire gun 774. The upper end of the vertical connecting rod 771 is fixed to the Y-axis slide table 7641 by bolts. The combined support frame 772 is fixed to the bottom of the vertical connecting rod 771. The welding torch 773 and the welding wire gun 774 are fixed on the combined support frame 772. The welding torch 773 and the welding wire gun 774 are located on both sides of the vertical connecting rod 771 and are arranged parallel to each other. The welding wire supply assembly is used to supply welding wire to the welding wire gun 774. The welding wire supply assembly includes a welding wire feeder 100 and a welding wire guide 75. The welding wire feeder 100 is fixed on the second base 60, and the welding wire guide 75 is fixed on the support cantilever 742. During operation, the welding wire feeder 100 supplies welding wire at a certain speed. After being guided by the welding wire guide 75, the welding wire enters the welding wire gun 774 to feed the welding wire. Since the circular weld seam is quite deep, in order to allow the working end of the welding torch 773 to penetrate deep into the circular weld seam, the welding wire torch 774 adopts a curved torch structure, that is, the working end of the welding wire torch 774 is bent downward in an arc.

[0048] refer to Figure 7The argon supply device 90 includes a movable trolley 91, an argon nozzle 95, and a position adjustment mechanism; the argon nozzle 95 extends into the valve body 10 and is connected to the argon supply device 110; the position adjustment mechanism is mounted on the movable trolley 91 and is used to drive the argon nozzle 95 to move in a vertical plane. The position adjustment mechanism includes a vertical column 92, a vertical adjustment component, a horizontal connection component 93, and a horizontal extension rod 94. The vertical column 92 is fixed on the mobile trolley 91, and the vertical adjustment component and the horizontal connection component 93 are arranged between the vertical column 92 and the horizontal extension rod 94. The argon nozzle 95 is fixed to the end of the horizontal extension rod 94. Both the vertical adjustment component and the horizontal connection component 93 adopt a combination of motor and gear rack mechanism, or a combination of motor and sprocket chain mechanism, or a combination of motor and lead screw mechanism. In this way, the argon supply device 90 can be adapted to the welding of valve bodies of different diameters through the vertical adjustment component, and the horizontal connection component 93 can allow the argon nozzle 95 to reach the annular weld seam at any position along the interior of the valve body 10.

[0049] Example 2: The difference between Example 2 and Example 1 is as follows: (Refer to...) Figures 8-10 The end of the short-distance drive component 76 is provided with a horizontal plane rotating component; the horizontal plane rotating component is used to drive the welding gun assembly 77 to rotate on the horizontal plane so that when welding two circular weld seams, the working end of the welding gun assembly 77 is facing the valve body 11.

[0050] refer to Figures 8-10 The Y-axis slide 7641 is a rectangular frame surrounding the entire Y-axis drive cylinder 764; the horizontal rotating component includes a horizontal rotating seat 7642 and a pair of vertically distributed limiting bolts 78; the horizontal rotating seat 7642 is fixed on the bottom surface of the Y-axis slide 7641; the vertical connecting rod 771 of the welding torch assembly 77 is vertically arranged and rotatably connected to the horizontal rotating seat 7642; the limiting bolts 78 pass horizontally through and are screwed onto the horizontal rotating seat 7642, and a sliding column 781 is formed on its inner end; a pair of vertically distributed coaxially arranged limiting ring grooves 7710 are formed on the vertical connecting rod 771; the limiting ring grooves 7710 correspond one-to-one with the sliding columns 781 and allow the corresponding sliding columns 781 to slide in a 180-degree arc; the pair of sliding columns 781 simultaneously reach the two ends of the corresponding limiting ring grooves.

[0051] During operation, simultaneously loosen a pair of limit bolts 78 to separate the end of the sliding column 781 from the bottom of the limit ring groove 7710. This allows the vertical connecting rod 771 to rotate around the horizontal rotating seat 7642. After rotating 180 degrees, tighten the pair of limit bolts 78. This ensures that when welding the two circular weld seams, the working end of the welding torch assembly 77 faces the valve body 11, thus avoiding interference between the welding torch assembly 77 and the valve body 11.

[0052] Example 3: The difference between Example 3 and Example 2 is as follows: (Refer to...) Figure 11 and Figure 12 The horizontal rotating component does not require manual operation; the horizontal rotating component includes a horizontal rotating seat 7642 and a motorized drive component 79; the motorized drive component 79 includes a power drive component and a transmission structure; the power drive component drives the vertical connecting rod 771 to reciprocate 180 degrees on the horizontal rotating seat 7642 through the transmission structure.

[0053] refer to Figure 12 The upper end of the Y-axis slide 7641 is formed with an inverted L-shaped upper support frame 7643; at least one pair of vertically distributed side support seats 7644 are formed on the vertical end face of the Y-axis slide 7641; the power drive component is a rotary cylinder 791 fixed on the upper support frame 7643, and the rotary cylinder 791 can also be replaced by an electric motor or a rotary hydraulic motor. The transmission structure includes a first transmission gear 792, a transmission center shaft 794, a second transmission gear 793, a third transmission gear 795, and a fourth transmission gear 796; the upper end of the vertical connecting rod 771 is rotatably connected to the horizontal rotating seat 7642 through a pair of vertically distributed bearings, and the fourth transmission gear 796 is coaxially fixed to the vertical connecting rod 771. The upper end of 1; the transmission center shaft 794 vertically passes through all the side support seats 7644 and is rotatably connected by bearings; the transmission center shaft 794, the vertical connecting rod 771 and the rotating shaft of the rotary cylinder 791 are arranged in parallel; the first transmission gear 792 is coaxially fixed on the output shaft of the rotary cylinder 791; the second transmission gear 793 is coaxially fixed on the upper end of the transmission center shaft 794; the third transmission gear 795 is coaxially fixed on the lower end of the transmission center shaft 794; the first transmission gear 792 meshes with the second transmission gear 793; a notch is formed on the side wall of the horizontal rotating seat 7642 for the third transmission gear 795 to enter; the fourth transmission gear 796 meshes with the third transmission gear 795.

[0054] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic valve body welding machine for welding valve bodies (10), characterized in that: include: A support rotation device (20) is provided to keep the valve body (10) axially horizontal and drive the valve body (10) to rotate. Welding device (50) for welding the circumferential weld between the valve body body (11) of the valve body (10) and the connecting pipes (13) at both ends; The welding device (50) includes a welding mechanism (70); the welding mechanism (70) includes a welding frame (71), a welding torch assembly (77), a welding wire supply assembly, and a welding torch adjustment assembly; the welding frame (71) is arranged parallel to the valve body (10); the welding torch assembly (77) includes a welding torch (773) and a welding wire torch (774); the welding wire supply assembly is used to supply welding wire to the welding wire torch (774); the welding torch adjustment assembly is located between the welding frame (71) and the welding torch assembly (77) and is used to adjust the position and tilt angle of the welding torch (773) relative to the valve body (10).

2. The automatic valve body welding machine according to claim 1, characterized in that: The support rotation device (20) includes a support rotation mechanism (40); the support rotation mechanism (40) includes a support rotation seat (41), a three-jaw chuck (42) and a pair of auxiliary support components (43); the support rotation seat (41) is provided with a rotation component; the rotation component drives the three-jaw chuck (42) to rotate; the pair of auxiliary support components (43) are distributed along the axial direction of the three-jaw chuck (42); the auxiliary support component (43) includes an auxiliary support frame; the pair of auxiliary support frames respectively support a pair of connecting pipes (13).

3. The automatic valve body welding machine according to claim 2, characterized in that: The main lifting assembly is provided inside the support rotating seat (41); the main lifting assembly is used to drive the three-jaw chuck (42) and the rotating assembly to lift synchronously; the auxiliary support assembly (43) also includes an auxiliary lifting component; the auxiliary lifting component is used to drive the auxiliary support frame to lift; the main lifting assembly and a pair of auxiliary lifting components work together to adapt to valve bodies (10) with different set diameters.

4. The automatic valve body welding machine according to claim 2, characterized in that: The auxiliary support frame includes a support frame body (432) and a pair of rollers (433); the upper end of the support frame body (432) is provided with a V-shaped mounting groove; the pair of rollers (433) are rotatably connected to the support frame body (432) and are symmetrically arranged with respect to the center of symmetry of the mounting groove; the rollers (433) abut against the outer cylindrical surface of the connecting pipe (13).

5. The automatic valve body welding machine according to claim 1, characterized in that: The welding torch adjustment assembly includes a welding torch support (74), a long-distance drive, a vertical plane rotation drive, and a short-distance drive (76); the long-distance drive is disposed between the welding frame (71) and the welding torch support (74); the long-distance drive is used to drive the welding torch support (74) to move in a vertical plane parallel to the axial direction of the valve body (10) and to cause the welding torch assembly (77) to move between the two annular weld seams of the valve body (10); the vertical plane rotation drive is disposed on the welding torch support (74) and is used to drive the short-distance drive (76) to rotate in a vertical plane; the short-distance drive (76) is used to drive the welding torch assembly (77) to move along the XYZ three axes and to rotate in a vertical plane parallel to the axial direction of the valve body (10).

6. The automatic valve body welding machine according to claim 5, characterized in that: The end of the short-distance drive member (76) is provided with a horizontal plane rotating member; the horizontal plane rotating member is used to drive the welding gun assembly (77) to rotate on the horizontal plane so that when welding two circular weld seams, the working end of the welding gun assembly (77) is facing the valve body body (11).

7. An automatic valve body welding machine according to claim 6, characterized in that: The horizontal rotating component includes a horizontal rotating seat (7642) and a pair of vertically distributed limiting bolts (78); the welding torch assembly (77) includes a vertically arranged vertical connecting rod (771) rotatably connected to the horizontal rotating seat (7642); the limiting bolts (78) are screwed onto the horizontal rotating seat (7642) and have a sliding column (781) formed on their inner end; a pair of vertically distributed coaxial limiting ring grooves (7710) are formed on the vertical connecting rod (771); the limiting ring grooves (7710) correspond one-to-one with the sliding columns (781) and allow the corresponding sliding columns (781) to slide in an 180-degree arc; the pair of sliding columns (781) simultaneously reach the two ends of the corresponding limiting ring grooves.

8. An automatic valve body welding machine according to claim 6, characterized in that: The horizontal rotating component includes a horizontal rotating seat (7642) and a motor drive component (79); the motor drive component (79) includes a power drive component and a transmission structure; the welding torch assembly (77) includes a vertically arranged and rotatably connected vertical connecting rod (771) on the horizontal rotating seat (7642); the power drive component drives the vertical connecting rod (771) to reciprocate 180 degrees through the transmission structure.

9. An automatic valve body welding machine according to claim 1, characterized in that: It also includes an argon supply device (110) and an argon supply device (90); the argon supply device (110) supplies argon to the argon supply device (90); the argon supply device (90) is used to replenish argon to the valve body (10).

10. An automatic valve body welding machine according to claim 1, characterized in that: The welding torch (773) adopts a curved torch structure.

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