Automatic welding device for safety valve

Abstract

The present invention relates to the field of welding devices, and specifically to an automatic welding device for a safety valve. It includes a frame, a clamping and rotating mechanism, a power device, and a welding assembly; the clamping and rotating mechanism is symmetrically arranged in two groups on the frame, including an outer gear ring arranged on the frame, a mounting cylinder arranged on the frame and coaxially distributed with the outer gear ring, an inner gear ring coaxially arranged on the mounting cylinder and located inside the outer gear ring, and multiple groups of clamping and rotating assemblies that are simultaneously meshed and connected with the outer gear ring and the inner gear ring, and the multiple groups of clamping and rotating assemblies are evenly distributed around the central axis of the inner gear ring; the power device is arranged on the frame and is used to drive the two groups of clamping and rotating mechanisms to operate, and the two groups of clamping and rotating mechanisms clamp the flange and the valve respectively when operating and drive the flange and the valve to rotate coaxially; the welding assembly includes a welding gun facing the joint between the flange and the valve. The present invention can drive the valve and the flange to rotate synchronously for effective welding, and can coaxially clamp and align valves and flanges of different specifications and weld them.

Description

Technical Field

[0001] The invention relates to the field of welding devices, in particular to an automatic welding device for a safety valve. Background Art

[0002] As a kind of valve, the safety valve sometimes needs to be welded with a flange. The welding is usually performed manually. First, the valve and the flange are connected, and then a welding gun is used for welding. The manual welding method has poor welding accuracy.

[0003] Chinese patent announcement No. CN118218861B discloses a valve assembly welding device, including a docking device, which is used to assemble and dock a flange with a valve. The docking device is provided with a clamping device and a moving device. The clamping device is used to clamp the flange to be welded, and the moving device is used to drive the valve to rotate, thereby completing the welding of the valve and the flange.

[0004] However, the above technical solution has the following shortcomings:

[0005] 1. When welding, spot welding is first performed at the joint between the valve and the flange, and then the flange is driven by rotating the valve. Because the flange is clamped by the clamping claw mechanism, the load is large, resulting in excessive shear force on the spot weld, which makes the spot weld easy to crack. Even if the valve is rotated, the flange cannot be effectively driven to rotate, and the welding process cannot be achieved;

[0006] 2. The valve center axis of the flange to be welded must be coaxial with the rotating gear ring. The position of the valve clamping is determined, so it can only be applied to valve specifications with a unique distance from the clamping position to the valve welding center axis. However, different valves have different specifications, and valves of other specifications may not necessarily be able to be aligned and welded by this welding device. Summary of the invention

[0007] The purpose of the present invention is to solve the problems existing in the background technology and to provide an automatic welding device for a safety valve, which can drive the valve and the flange to rotate synchronously for effective welding, and can coaxially clamp, align and weld valves and flanges of different specifications.

[0008] The technical solution of the present invention is an automatic welding device for a safety valve, comprising a frame, a clamping and rotating mechanism, a power device and a welding assembly; the clamping and rotating mechanism is symmetrically arranged in two groups on the frame, including an outer gear ring arranged on the frame, a mounting cylinder arranged on the frame and coaxially distributed with the outer gear ring, an inner gear ring coaxially arranged on the mounting cylinder and located on the inner side of the outer gear ring, and a plurality of clamping and rotating assemblies simultaneously meshed and connected with the outer gear ring and the inner gear ring, and the plurality of clamping and rotating assemblies are evenly distributed around the central axis of the inner gear ring; the clamping and rotating assembly comprises a gear simultaneously meshed and connected with the outer gear ring and the inner gear ring, a rotating shaft coaxially arranged on the gear, a rotating cover rotatably arranged on the rotating shaft, a linkage assembly tensionedly connected between the rotating shaft and the rotating cover, a rotating frame rotatably connected with the rotating shaft, a roller rotatably arranged on the rotating frame and rollingly connected with the inner circumferential surface of the mounting cylinder, a bevel toothed disk coaxially arranged on the rotating cover, a bevel gear meshed with the bevel toothed disk, a screw rod rotatably arranged on the rotating frame and connected to the bevel gear at one end, a base arranged on the rotating frame and rotatably connected to the other end of the screw rod, and a linkage assembly tensionedly connected between the rotating shaft and the rotating cover, a rotating frame rotatably connected with the rotating shaft, a roller rotatably arranged on the rotating frame and rollingly connected with the inner circumferential surface of the mounting cylinder, a bevel toothed disk coaxially arranged on the rotating cover, a bevel gear meshed with the bevel toothed disk, a screw rod rotatably arranged on the rotating frame and connected to the bevel gear at one end, a base arranged on the rotating frame and rotatably connected to the other end of the screw rod, and a base connected to the screw rod. A screw nut connected with a thread, a movable table connected with the screw nut, and two sets of clamping assemblies symmetrically distributed on both sides of the movable table, the clamping assembly includes a clamping plate and a connecting rod connected in a V-shaped rotation, the outer end of the clamping plate is rotatably connected to the movable table, and the outer end of the connecting rod is rotatably connected to the base; the linkage assembly includes a rotating table arranged on a rotating shaft, a guide rod whose two ends are respectively connected to the two ends of the rotating table, a pawl slidably arranged on the guide rod, a first spring sleeved on the outer peripheral side of the guide rod and whose two ends are respectively connected to one side of the pawl and one end of the rotating table, a second spring sleeved on the outer peripheral side of the guide rod and whose two ends are respectively connected to the other side of the pawl and the other end of the rotating table, the guide rod is an arc-shaped rod and the center of the circle is staggered relative to the central axis of the rotating shaft, the rotating cover has a plurality of ratchet grooves evenly distributed around the central axis and connected end to end, and the ratchet abuts against the ratchet grooves; a power device is arranged on the frame and is used to drive the two sets of clamping rotating mechanisms to operate, and when the two sets of clamping rotating mechanisms are in operation, the flange and the valve are clamped respectively and the flange and the valve are driven to rotate coaxially; a welding assembly is arranged on the frame, and includes a welding gun facing the joint between the flange and the valve.

[0009] Preferably, the ratchet groove is a V-shaped groove and one side of the groove surface is distributed radially along the rotating shaft.

[0010] Preferably, the first spring length is smaller than the second spring length.

[0011] Preferably, the power device includes a power mechanism arranged on a frame, a driving gear connected to the output end of the power mechanism, a mounting shaft rotatably arranged on the frame, and a driven gear and two connecting gears coaxially arranged on the mounting shaft, the driven gear is meshed and connected with the driving gear, the two connecting gears are respectively meshed and connected with two inner gear rings in two sets of clamping rotating mechanisms, and the connecting gears and the outer gear rings are staggered.

[0012] Preferably, a guide rod is vertically arranged on the frame, a first threaded knob is vertically rotatably connected to the frame, a bracket is slidably arranged on the guide rod, and the bracket is threadedly connected to the first threaded knob.

[0013] Preferably, the welding assembly also includes a slide rail arranged on the frame, a slider slidably arranged on the slide rail, a bracket arranged on the slider, and a second threaded knob threadably connected to the slider, the welding gun is arranged on the bracket, a second channel is arranged on the slide rail, a first channel connected to the second channel is arranged on the frame, and the second threaded knob passes through the first channel and the second channel and abuts against the frame.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] The invention can drive the valve and the flange to rotate synchronously for effective welding, can coaxially clamp and align valves and flanges of different specifications and weld them, has a wide range of applications and high welding accuracy. After the two sets of clamping and rotating mechanisms are clamped on the flange and the valve, they can drive the flange and the valve to rotate on the same central axis, ensuring accurate circumferential welding of the butt joint by the welding gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0017] Figure 2 for Figure 1 A magnified view of the structure at center A;

[0018] Figure 3 It is a schematic diagram of a local structure of an embodiment of the present invention;

[0019] Figure 4 A partial structural cross-sectional view of an embodiment of the present invention;

[0020] Figure 5 for Figure 4 A magnified view of the structure at B in the middle;

[0021] Figure 6 It is a cross-sectional view of the principle structure of the welding gun position adjustment;

[0022] Figure 7 This is a schematic diagram of the finished product structure after a flange and a valve are butt-welded;

[0023] Figure 8 This is a schematic diagram of the finished product structure after welding another flange and a valve.

[0024] 1. The camshaft of the first embodiment of the present invention is provided with a plurality of gears, each of which is provided with a plurality of gears, each of which is provided with a plurality of gears. The camshaft of the first embodiment of the present invention is provided with a plurality of gears, each of which is provided with a plurality of gears. The camshaft of the first embodiment of the present invention is provided with a plurality of gears, each of which is provided with a plurality of gears. DETAILED DESCRIPTION

[0025] Embodiment 1, as Figure 1-Figure 6 As shown, the automatic welding device for a safety valve proposed in this embodiment includes a frame 1, a clamping and rotating mechanism, a power device and a welding assembly.

[0026] The clamping and rotating mechanism is symmetrically arranged in two groups on the frame 1, including an outer gear ring 2 arranged on the frame 1, a mounting cylinder 4 arranged on the frame 1 and coaxially distributed with the outer gear ring 2, an inner gear ring 3 coaxially rotatably arranged on the mounting cylinder 4 and located inside the outer gear ring 2, and multiple clamping and rotating components meshingly connected with the outer gear ring 2 and the inner gear ring 3 at the same time, and the meshing teeth are distributed inside the outer gear ring 2 and outside the inner gear ring 3. The multiple clamping and rotating components are evenly distributed around the central axis of the inner gear ring 3, so that they can be evenly clamped on the flange 100 and the valve 200.

[0027] like Figure 1 and Figure 3 As shown, the power device is arranged on the frame 1 and is used to drive the two sets of clamping rotating mechanisms to operate. When the two sets of clamping rotating mechanisms operate, the flange 100 and the valve 200 are clamped respectively and the flange 100 and the valve 200 are driven to rotate coaxially. The power device includes a power mechanism 22 arranged on the frame 1, a driving gear 23 connected to the output end of the power mechanism 22, a mounting shaft 25 rotatably arranged on the frame 1, and a driven gear 24 and two connecting gears 26 coaxially arranged on the mounting shaft 25. The driven gear 24 is meshed and connected with the driving gear 23, and the two connecting gears 26 are respectively meshed and connected with the two inner gear rings 3 in the two sets of clamping rotating mechanisms, and the connecting gear 26 and the outer gear ring 2 are staggered. The power mechanism 22 can drive the driving gear 23 to rotate, the driving gear 23 drives the driven gear 24 to rotate, the driven gear 24 drives the mounting shaft 25 to rotate, the mounting shaft 25 drives the two connecting gears 26 to rotate, and the two connecting gears 26 respectively drive the two inner gear rings 3 in the two sets of clamping rotating mechanisms to rotate, thereby realizing the synchronous operation of the two sets of clamping rotating mechanisms.

[0028] The clamping rotating assembly includes a gear 5 meshingly connected to the outer gear ring 2 and the inner gear ring 3 at the same time, a rotating shaft 6 coaxially arranged on the gear 5, a rotating cover 8 rotatably arranged on the rotating shaft 6, a linkage assembly tensioned between the rotating shaft 6 and the rotating cover 8, a rotating frame 7 rotatably connected to the rotating shaft 6, a roller 21 rotatably arranged on the rotating frame 7 and rollingly connected to the inner circumference of the mounting cylinder 4, a bevel gear 14 coaxially arranged on the rotating cover 8, a bevel gear 15 meshingly connected to the bevel gear 14, a screw 16 rotatably arranged on the rotating frame 7 and connected to the bevel gear 15 at one end, a base 17 arranged on the rotating frame 7 and rotatably connected to the other end of the screw 16, a screw nut 161 threadedly connected to the screw 16, a moving platform 18 connected to the screw nut 161, and two groups of clamping assemblies symmetrically distributed on both sides of the moving platform 18, the clamping assembly includes a clamping plate 19 and a connecting rod 20 rotatably connected in a V shape, the outer end of the clamping plate 19 is rotatably connected to the moving platform 18, and the outer end of the connecting rod 20 is rotatably connected to the base 17.

[0029] The power device drives the inner gear ring 3 to rotate, and the inner gear ring 3 drives the gear 5 to rotate. The gear 5 performs self-rotation and revolution between the inner gear ring 3 and the outer gear ring 2 at the same time. The self-rotation movement drives the rotating shaft 6 to rotate. The rotating shaft 6 drives the rotating cover 8 to rotate through the linkage assembly. The rotating cover 8 drives the bevel gear plate 14 to rotate. The bevel gear plate 14 drives the bevel gear 15 to rotate. The bevel gear 15 drives the screw rod 16 to rotate. The screw rod 16 drives the screw nut 161 to move inward. The screw nut 161 drives the moving platform 18 to move. The moving platform 18 drives the clamping plate 19 to move inward until the clamping plate 19 abuts against the circumferential surface of the flange 100 or the circumferential surface of the valve 200, completing the clamping process. Then, the revolution movement of the gear 5 can realize the revolution of the clamping rotating assembly, thereby driving the clamped flange 100 and valve 200 to rotate around the same central axis.

[0030] The linkage assembly includes a rotating table 9 arranged on the rotating shaft 6, a guide rod 10 whose two ends are respectively connected to the two ends of the rotating table 9, a pawl 13 slidably arranged on the guide rod 10, a first spring 11 sleeved on the outer peripheral side of the guide rod 10 and whose two ends are respectively connected to one side of the pawl 13 and one end of the rotating table 9, and a second spring 12 sleeved on the outer peripheral side of the guide rod 10 and whose two ends are respectively connected to the other side of the pawl 13 and the other end of the rotating table 9. The guide rod 10 is an arc-shaped rod and its center is staggered relative to the central axis of the rotating shaft 6. The rotating cover 8 has a plurality of ratchet grooves 801 evenly distributed around the central axis and connected end to end, and the ratchet 13 abuts against the ratchet grooves 801.

[0031] The ratchet groove 801 is a V-shaped groove and one side of the groove surface is distributed radially along the rotating shaft 6. When the ratchet 13 moves from one ratchet groove 801 to the inner side of the adjacent ratchet groove 801, it will be closely connected, and will not cause the rotating cover 8 to reverse, and the clamping plate 19 will not be loosened outward. The length of the first spring 11 is less than the length of the second spring 12. After the flange 100 or the valve 200 is clamped, as the rotating shaft 6 continues to rotate, the first spring 11 is intermittently compressed by the ratchet 13, and the first spring 11 is intermittently extended. The flange 100 or the valve 200 rotates in the clamped state.

[0032] like Figure 7 As shown, the outer diameters of the clamped portion of the flange 100 and the clamped portion of the valve 200 are equal, and the flange 100 and the valve 200 can be clamped synchronously, thereby rotating synchronously.

[0033] like Figure 8 As shown, the outer diameters of the clamped portion of the flange 100 and the clamped portion of the valve 200 are not equal, and the outer diameter of the clamped portion of the flange 100 is larger. At this time, the clamping rotation mechanism used to clamp the flange 100 will first clamp the flange 100, and will drive the flange 100 to rotate first. In the linkage assembly, the ratchet 13 passes through multiple ratchet grooves 801 in sequence, and the flange 100 rotates while maintaining the clamped state. After another set of clamping rotation mechanisms clamps the valve 200, the flange 100 and the valve 200 will rotate synchronously and coaxially.

[0034] The welding assembly is arranged on the frame 1, and includes a welding gun 33 facing the joint of the flange 100 and the valve 200, a slide rail 30 arranged on the frame 1, a slider 31 slidably arranged on the slide rail 30, a bracket 32 ​​arranged on the slider 31, and a second threaded knob 34 threadedly connected to the slider 31. The welding gun 33 is arranged on the bracket 32, a second channel 301 is arranged on the slide rail 30, a first channel 101 connected to the second channel 301 is arranged on the frame 1, and the second threaded knob 34 penetrates the first channel 101 and the second channel 301 and abuts against the frame 1. After the flange 100 and the valve 200 are butt-clamped, it is necessary to adjust the position of the welding gun 33, and align the welding gun 33 with the joint of the flange 100 and the valve 200 to facilitate accurate circumferential welding. When adjusting the position of the welding gun 33, first loosen the second threaded knob 34, then move the bracket 32, and after adjusting the welding gun 33 to the right position, tighten the second threaded knob 34, and the second threaded knob 34 is pressed against the frame 1 to ensure that the welding gun 33 is stably maintained in the adjusted position.

[0035] This embodiment can drive the valve 200 and the flange 100 to rotate synchronously for effective welding, and can coaxially clamp, align and weld valves 200 and flanges 100 of different specifications, with a wide range of applications and high welding accuracy. The two sets of clamping and rotating mechanisms are used to clamp the flange 100 and the valve 200 respectively. Under the driving action of the power device, the two sets of clamping and rotating mechanisms operate simultaneously. After clamping the flange 100 and the valve 200, they can be automatically aligned, and can drive the flange 100 and the valve 200 to rotate about the same central axis, ensuring accurate circumferential welding of the butt joint by the welding gun 33.

[0036] Embodiment 2, as Figure 1-Figure 6 As shown, the automatic welding device of a safety valve proposed in this embodiment, compared with the first embodiment, in this embodiment, a guide rod 28 is vertically arranged on the frame 1, a first threaded knob 29 is vertically rotatably connected on the frame 1, a bracket 27 is slidably arranged on the guide rod 28, and the bracket 27 is threadedly connected with the first threaded knob 29. Before clamping the flange 100, the valve 200 is first placed on the bracket 27, the first threaded knob 29 is rotated, and the height of the bracket 27 is adjusted. The bracket 27 drives the valve 200 to a height where the central axis of the welding end is slightly lower than the central axis of the inner gear ring 3 in a set of clamping rotating mechanisms. Then the flange 100 is passed through the inner side of the multiple clamping rotating components in another set of clamping rotating mechanisms, and the welding ends of the flange 100 and the valve 200 are butted, so as to be clamped and driven to rotate by two sets of clamping rotating mechanisms respectively. The bracket 27 plays the role of assisting in supporting the valve 200 to facilitate the workers to butt the flange 100 with the valve 200, saving the workers' effort.

[0037] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An automatic welding device for a safety valve, characterized in that: include: Rack(1); A clamping rotation mechanism, wherein two groups are symmetrically arranged on a frame (1), comprising an outer gear ring (2) arranged on the frame (1), a mounting cylinder (4) arranged on the frame (1) and coaxially distributed with the outer gear ring (2), an inner gear ring (3) coaxially arranged on the mounting cylinder (4) and located inside the outer gear ring (2), and a plurality of clamping rotation components simultaneously meshed with the outer gear ring (2) and the inner gear ring (3), wherein the plurality of clamping rotation components are evenly distributed around the central axis of the inner gear ring (3); the clamping rotation components comprise a gear (5) simultaneously meshed with the outer gear ring (2) and the inner gear ring (3), a gear (5) coaxially arranged on the gear (5), a rotating shaft (6) on the rotating shaft (6), a rotating cover (8) rotatably arranged on the rotating shaft (6), a linkage assembly tensionedly connected between the rotating shaft (6) and the rotating cover (8), a rotating frame (7) rotatably connected to the rotating shaft (6), a roller (21) rotatably arranged on the rotating frame (7) and rollingly connected to the inner circumferential surface of the mounting cylinder (4), a bevel gear (14) coaxially arranged on the rotating cover (8), a bevel gear (15) meshingly connected to the bevel gear (14), a screw rod (16) rotatably arranged on the rotating frame (7) and having one end connected to the bevel gear (15), and a roller (21) arranged on the rotating frame (7) and meshingly connected to the screw rod (16). The other end of the base (17) is rotatably connected, a screw nut (161) is threadedly connected to the screw (16), a movable platform (18) is connected to the screw nut (161), and two sets of abutment components are symmetrically distributed on both sides of the movable platform (18), the abutment components include a clamping plate (19) and a connecting rod (20) that are rotatably connected in a V shape, the outer end of the clamping plate (19) is rotatably connected to the movable platform (18), and the outer end of the connecting rod (20) is rotatably connected to the base (17); the linkage component includes a rotating platform (9) arranged on the rotating shaft (6), and guide rods (10) whose two ends are respectively connected to the two ends of the rotating platform (9). , a ratchet (13) slidably arranged on the guide rod (10), a first spring (11) sleeved on the outer peripheral side of the guide rod (10) and having two ends respectively connected to one side of the ratchet (13) and one end of the rotating platform (9), and a second spring (12) sleeved on the outer peripheral side of the guide rod (10) and having two ends respectively connected to the other side of the ratchet (13) and the other end of the rotating platform (9), the guide rod (10) is an arc-shaped rod and the center of the circle is staggered relative to the central axis of the rotating shaft (6), the rotating cover (8) has a plurality of ratchet grooves (801) evenly distributed around the central axis and connected end to end, and the ratchet (13) abuts against the ratchet grooves (801); A power device is arranged on a frame (1) and is used to drive two sets of clamping rotating mechanisms to operate. When the two sets of clamping rotating mechanisms operate, they clamp a flange (100) and a valve (200) respectively and drive the flange (100) and the valve (200) to rotate coaxially. The power device comprises a power mechanism (22) arranged on the frame (1), a driving gear (23) connected to the output end of the power mechanism (22), a mounting shaft (25) rotatably arranged on the frame (1), and a driven gear (24) and two connecting gears (26) coaxially arranged on the mounting shaft (25). The driven gear (24) is meshedly connected with the driving gear (23), and the two connecting gears (26) are respectively meshedly connected with two inner gear rings (3) in the two sets of clamping rotating mechanisms. The connecting gear (26) and the outer gear ring (2) are staggered. A welding assembly is arranged on a frame (1) and comprises a welding gun (33) facing the joint between the flange (100) and the valve (200).

2. The automatic welding device for a safety valve according to claim 1, characterized in that: The ratchet groove (801) is a V-shaped groove, and a groove surface on one side is distributed radially along the rotating shaft (6).

3. The automatic welding device for a safety valve according to claim 1, characterized in that: The length of the first spring (11) is smaller than the length of the second spring (12).

4. The automatic welding device for a safety valve according to claim 1, characterized in that: A guide rod (28) is vertically arranged on the frame (1), a first threaded knob (29) is vertically rotatably connected to the frame (1), a bracket (27) is slidably arranged on the guide rod (28), and the bracket (27) is threadably connected to the first threaded knob (29).

5. The automatic welding device for a safety valve according to claim 1, characterized in that: The welding assembly further comprises a slide rail (30) arranged on the frame (1), a slider (31) slidably arranged on the slide rail (30), a bracket (32) arranged on the slider (31), and a second threaded knob (34) threadedly connected to the slider (31); the welding gun (33) is arranged on the bracket (32); a second channel (301) is arranged on the slide rail (30); a first channel (101) connected to the second channel (301) is arranged on the frame (1); and the second threaded knob (34) passes through the first channel (101) and the second channel (301) and abuts against the frame (1).

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