Welding device applied to all-welded ball valve body

Abstract

The invention relates to the technical field of ball valve welding, in particular to a welding device applied to an all-welded ball valve body, which comprises a rack, a first positioning mechanism, a second positioning mechanism, a welding mechanism and a dust suction device, the first positioning mechanism comprises a rotary ring and two V-shaped positioning blocks arranged in the rotary ring in a sliding mode. The second positioning mechanism comprises two vertical sliding plates which are symmetrically arranged left and right, sliding blocks are arranged on the upper sides and the lower sides of the two vertical sliding plates in a sliding mode, horizontally-arranged positioning rods are fixedly connected to the sliding blocks, and positioning inclined blocks are arranged at the ends of the positioning rods; the welding mechanism and the dust collection device are both arranged on the rack. By means of the first positioning mechanism and the second positioning mechanism, accurate centering and clamping of the first valve body and the second valve body with different diameters can be achieved, the consistency and accuracy of the welding position are ensured, and therefore the welding quality of products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valve welding, and more particularly to a welding device applied to a fully welded ball valve body. Background Art

[0002] In the manufacturing process of fully welded ball valves, the connection strength and sealing between valve bodies are crucial. Welding operations usually rely on manual positioning and fixing, which is not only inefficient but also difficult to ensure the consistency and accuracy of welding quality. In addition, manual operation is prone to human errors, especially when dealing with valve bodies of different sizes or complex shapes, which increases production difficulty and defective rate. At the same time, a large amount of smoke and harmful gases will be generated during the welding process, posing a threat to the health of operators and polluting the working environment.

[0003] In order to improve welding quality and efficiency and improve the working environment, various automated welding devices have appeared in the prior art. However, these devices are often designed for specific types of workpieces and still have problems such as inaccurate positioning, narrow application range, and inability to effectively handle dust and gas during welding.

[0004] The Chinese invention patent application with publication number CN114346509A discloses a ball valve welding device and a welding method thereof, which uses an electromagnet to adsorb the component and then clamps the component through an arc clamp. Although the valve body can be positioned and clamped, its structure is only suitable for small-sized valve bodies and cannot stably clamp large valve bodies. In order to ensure welding accuracy, the speeds of the two second motors must be completely synchronized, resulting in high motor costs.

[0005] The Chinese utility model patent with publication number CN212918220U discloses a ball valve welding device, which clamps the workpiece by moving the telescopic rod to drive the auxiliary plate. Although the workpiece can be fixed, it cannot achieve accurate alignment of the two cylindrical components and cannot meet the positioning requirements of the fully welded ball valve.

[0006] Therefore, it is necessary to improve the prior art. Summary of the invention

[0007] In order to overcome the deficiencies in the prior art, a welding device for a fully welded ball valve body is provided which has high positioning accuracy and can process smoke generated during welding.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: A welding device for a fully welded ball valve body, comprising a frame, a first positioning mechanism, a second positioning mechanism, a welding mechanism and a dust suction device; The first positioning mechanism comprises a slewing ring and two V-shaped positioning blocks slidably arranged in the slewing ring, the slewing ring is rotatably arranged on the frame, the two V-shaped positioning blocks are symmetrical relative to the center of the slewing ring, a driving gear is rotatably arranged in the slewing ring, an end face toothed disc meshing with the driving gear is rotatably arranged on the slewing ring, and the end face toothed disc is transmission-connected with the first driving mechanism; the V-shaped positioning block is fixedly connected with a screw rod along the sliding direction, and the driving gear is provided with an internal thread matching with the screw rod thread; teeth are arranged on the circumferential surface of the slewing ring, and a second driving mechanism matching with the teeth is arranged on the frame; The second positioning mechanism includes two vertical slides symmetrically arranged on the left and right, the vertical slides are slidably connected to the frame, a bidirectional lead screw is rotatably arranged on the frame, the two vertical slides are respectively threadedly connected to the two sides of the bidirectional lead screw, and sliding blocks are slidably arranged on the upper and lower sides of the two vertical slides, a horizontally arranged positioning rod is fixedly connected to the sliding block, and a positioning bevel block is arranged at the end of the positioning rod; positioning frames are fixedly connected to both sides of the frame, and an adjusting gear I and an adjusting gear II that are coaxial and rotate in opposite directions are rotatably arranged in the positioning frame, and racks are hinged on the two positioning rods on the same side of the frame, and the two racks are respectively meshed with the adjusting gear I or the adjusting gear II, and the adjusting gear I and the adjusting gear II are connected to a third driving mechanism; The welding mechanism and the dust collecting device are both arranged on the frame.

[0009] Preferably, it also includes an internal support mechanism, which includes three horizontally arranged sliding bars, the three sliding bars are slidably arranged on the frame, and the three sliding bars are not in the same straight line, the sliding bars are rotatably provided with guide wheels, and a locking mechanism is provided between the sliding bars and the frame.

[0010] Preferably, the adjusting gear I is rotatably set on the positioning frame through the mounting shaft, and the adjusting gear II is rotatably set on the mounting shaft through the sleeve. The first bevel gears are fixedly connected to the sides of the adjusting gears I and II that are close to each other, and the positioning frame is rotatably connected to a second bevel gear that meshes with the two first bevel gears.

[0011] Preferably, the rear end of the frame is rotatably provided with two reversing shafts, the two reversing shafts are connected by a reversing gear transmission, and the mounting shafts on both sides of the frame extend backward and are connected to the reversing shaft on the corresponding side by a synchronous belt; The third driving mechanism comprises a driving motor, wherein a reversing shaft is connected to the driving motor.

[0012] Preferably, an elastic pressing plate is provided on the positioning frame, and a side surface of the elastic pressing plate is pressed against the bottom surface of the rack.

[0013] Preferably, the locking mechanism includes a first positioning plate, a second positioning plate and a pressure plate. The first positioning plate and the second positioning plate are fixedly arranged on the sliding rod. The pressure plate is slidably arranged on the sliding rod and is located between the first positioning plate and the second positioning plate. A clamping cam that cooperates with the pressure plate is rotatably arranged on the second positioning plate.

[0014] Preferably, the first driving mechanism and the second driving mechanism both include a control motor and a driving gear, the driving gear is fixedly connected to the motor shaft of the control motor, and the driving gear is meshed with the corresponding end face gear disc or teeth.

[0015] Preferably, the welding mechanism comprises an adjustable mounting arm and a welding machine, the adjustable mounting arm is fixedly arranged on the frame, and the welding machine is arranged at the end of the adjustable mounting arm.

[0016] Preferably, the dust collecting device comprises a first dust collector arranged at the lower end of the frame and a second dust collector arranged at the upper end of the frame, the first dust collector and the second dust collector are both slidably connected to the frame, and the first dust collector and the second dust collector are connected to the same dust collecting box through a pipe.

[0017] Preferably, two of the first positioning mechanisms are provided.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention can realize accurate centering and clamping of the first valve body and the second valve body of different diameters through the first positioning mechanism and the second positioning mechanism, thereby ensuring the consistency and accuracy of the welding position and improving the welding quality of the product. The first positioning mechanism realizes the center positioning of the first valve body through the two V-shaped positioning blocks in the slewing ring, ensuring that the first valve bodies of different diameters can be accurately centered and clamped. The second positioning mechanism utilizes the positioning rods and positioning bevel blocks on the vertical slide plate and the sliding block that are symmetrically arranged on the left and right to realize stable support and positioning of the second valve body. By adjusting components such as gear I, adjusting gear II and reversing gear, the positions of the four positioning bevel blocks can be adjusted synchronously to ensure accurate positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention from one angle; Figure 2 It is a schematic diagram of the overall structure of the present invention from another angle; Figure 3 It is a schematic diagram of the structure of the rack and the dust collection device; Figure 4 It is a structural schematic diagram of the second positioning mechanism at one angle; Figure 5It is a structural schematic diagram of the second positioning mechanism from another angle; Figure 6 for Figure 5 A partial enlarged view of middle A; Figure 7 is a structural schematic diagram of a third driving mechanism; Figure 8 for Figure 7 A partial enlarged view of B in the middle; Fig. 9 is a schematic diagram of the structure of the first positioning mechanism; Fig.10 It is a schematic diagram of the internal structure of the first positioning mechanism.

[0021] In the figure: 1-frame, 11-bidirectional lead screw, 12-positioning frame, 13-adjusting gear I, 14-adjusting gear II, 15-rack, 16-third driving mechanism, 17-mounting shaft, 18-sleeve, 19-first bevel gear, 110-second bevel gear, 111-reversing shaft, 112-reversing gear, 113-synchronous belt, 114-elastic clamping plate, 2-first positioning mechanism, 21-slewing ring, 22-V-type positioning block, 23-driving gear, 24-end face gear disc, 26-first driving mechanism, 27-screw, 28 -teeth, 29-second driving mechanism, 210-control motor, 211-driving gear, 3-second positioning mechanism, 31-vertical slide, 32-sliding block, 33-positioning rod, 34-positioning oblique block, 4-welding mechanism, 41-adjustable mounting arm, 42-welding machine, 5-dust suction device, 51-first dust collector, 52-second dust collector, 53-dust box, 6-internal support mechanism, 61-sliding rod, 62-guide wheel, 7-locking mechanism, 71-first positioning plate, 72-second positioning plate, 73-pressure plate, 74-pressing cam. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example:

[0024] like Figures 1 to 10As shown, a welding device for a fully welded ball valve body includes a frame 1, a first positioning mechanism 2, a second positioning mechanism 3, a welding mechanism 4 and a dust suction device 5. The first positioning mechanism 2 is used to position the first valve body, the second positioning mechanism 3 is used to position the second valve body, the welding mechanism 4 is used to weld the butt surfaces of the first valve body and the second valve body, and the dust suction device 5 is used to absorb dust and gas generated during the welding process.

[0025] The first positioning mechanism 2 includes a slewing ring 21 and two V-shaped positioning blocks 22 slidably arranged in the slewing ring 21. The slewing ring 21 is rotatably arranged on the frame 1. The circumferential surface of the slewing ring 21 is provided with teeth 28. The frame 1 is provided with a second driving mechanism 29 that cooperates with the teeth 28.

[0026] The two V-shaped positioning blocks 22 are symmetrical with respect to the center of the slewing ring 21 . A driving gear 23 is rotatably arranged inside the slewing ring 21 . An end face toothed disc 24 meshing with the driving gear 23 is rotatably arranged on the slewing ring 21 . The end face toothed disc 24 is transmission-connected to a first driving mechanism 26 .

[0027] In this embodiment, the first drive mechanism 26 and the second drive mechanism 29 both include a control motor 210 and a driving gear 211. Specifically, the second drive mechanism 29 includes a first control motor and a first driving gear, the first control motor is arranged on the frame 1, the first driving gear is arranged on the motor shaft of the first control motor, the first driving gear is meshed with the teeth 28, the first control motor drives the first driving gear to rotate, and then the teeth 28 drives the slewing ring 21 to rotate. The first drive mechanism 26 includes a second control motor and a second driving gear, the second control motor is fixedly arranged on the slewing ring 21, the second driving gear is arranged on the motor shaft of the second control motor and meshed with the end face gear disc 24. The second control motor drives the second driving gear to rotate, and then drives the end face gear disc 24 to rotate.

[0028] The two V-shaped positioning blocks 22 are fixedly connected with screw rods 27 along the sliding direction, and the driving gear 23 is provided with internal threads that match the threads of the screw rods 27. When the end face gear plate 24 rotates, the driving gear 23 is driven to rotate, thereby driving the screw rods 27 and the V-shaped positioning blocks 22 to move linearly. By adjusting the spacing between the two V-shaped positioning blocks 22, the first valve bodies of different diameters can be centered and clamped.

[0029] The second positioning mechanism 3 includes two vertical slides 31 symmetrically arranged on the left and right sides, and sliding blocks 32 are slidably arranged on the upper and lower sides of the two vertical slides 31, and a horizontally arranged positioning rod 33 is fixedly connected to the sliding block 32, and a positioning bevel block 34 is arranged at the end of the positioning rod 33. The positioning of the second valve body is achieved by synchronously adjusting the positions of the four positioning bevel blocks 34. Specifically, positioning frames 12 are fixedly connected on both sides of the frame 1, and the positioning frames 12 are rotatably provided with coaxial and reversely rotating adjustment gears I13 and II14, and racks 15 are hinged on the two positioning rods 33 on the same side of the frame 1, one of the racks 15 is meshed with the adjustment gear I13, and the other rack 15 is meshed with the adjustment gear II14, and the adjustment gears I13 and II14 are connected to the third driving mechanism 16. When the third driving mechanism 16 drives the adjusting gear I 13 and the adjusting gear II 14 to rotate, the corresponding rack 15 pulls the positioning rod 33 to move along the vertical slide plate 31 , thereby driving the corresponding positioning bevel block 34 to position and clamp the second valve body.

[0030] Preferably, an elastic pressing plate 114 is provided on the positioning frame 12, and one side of the elastic pressing plate 114 is pressed against the bottom surface of the rack 15, so that the rack 15 is always engaged with the adjustment gear I 13 or the adjustment gear II 14. In this embodiment, a notch is provided on the positioning frame 12, and the elastic pressing plate 114 is slidably disposed in the notch. A spring is connected between the elastic pressing plate 114 and the positioning frame 12, and the elastic pressing plate 114 is pulled by the spring to press the rack 15.

[0031] In order to realize synchronous reverse rotation of adjusting gear I13 and adjusting gear II14, adjusting gear I13 is rotatably set on the positioning frame 12 through the mounting shaft 17, and adjusting gear II14 is rotatably set on the mounting shaft 17 through the sleeve 18. The first bevel gears 19 are fixedly connected to the sides of adjusting gear I13 and adjusting gear II14 close to each other, and the positioning frame 12 is rotatably connected to a second bevel gear 110 meshing with the two first bevel gears 19.

[0032] In order to realize the synchronous movement of the positioning inclined blocks 34 on both sides, two reversing shafts 111 are rotatably arranged at the rear end of the frame 1, and the two reversing shafts 111 are connected by a reversing gear 112. The installation shafts 17 on both sides of the frame 1 extend backward and are connected by a synchronous belt 113 to the reversing shaft 111 on the corresponding side. The third driving mechanism 16 includes a driving motor, and one of the reversing shafts 111 is connected to the driving motor. When one of the reversing shafts 111 rotates, the reversing gear 112 drives the other reversing shaft 111 to move synchronously in the opposite direction, and then the synchronous belt 113 drives the corresponding installation shaft 17 to rotate synchronously.

[0033] In order to clamp the second valve bodies of different sizes, the vertical slide 31 is slidably connected to the frame 1, and a bidirectional screw 11 is rotatably provided on the frame 1. The two vertical slides 31 are respectively threadedly connected to the two sides of the bidirectional screw 11. Preferably, the bidirectional screw 11 is connected to a motor, and the motor drives the bidirectional screw 11 to rotate, thereby driving the two vertical slides 31 to move in opposite directions synchronously to adjust the distance between the positioning bevel blocks 34 on both sides.

[0034] Preferably, it also includes an internal support mechanism 6, which includes three horizontally arranged sliding bars 61, which are slidably arranged on the frame 1, and the three sliding bars 61 are not in the same straight line, and a guide wheel 62 is rotatably arranged on the sliding bar 61, and a locking mechanism 7 is arranged between the sliding bar 61 and the frame 1.

[0035] After the second positioning mechanism 3 positions the second valve body, the first valve body and the second valve body can be spot welded first to fix them relatively. Then the positions of the three slide bars 61 are moved so that the three guide wheels 62 contact the inner wall of the second valve body to achieve three-point positioning. The third driving mechanism 16 drives the adjusting gears I13 and II14 to rotate in the opposite direction so that the positioning bevel block 34 releases the second valve body. At this time, the second valve body can rotate synchronously with the first valve body, and then the entire circumference is welded.

[0036] Preferably, the locking mechanism 7 comprises a first positioning plate 71, a second positioning plate 72 and a pressure plate 73. The first positioning plate 71 and the second positioning plate 72 are fixedly arranged on the slide bar 61. The pressure plate 73 is slidably arranged on the slide bar 61 and is located between the first positioning plate 71 and the second positioning plate 72. A pressing cam 74 cooperating with the pressure plate 73 is rotatably arranged on the second positioning plate 72. By rotating the pressing cam 74 so that the pressing cam 74 presses the pressure plate 73, the pressure plate 73 can cooperate with the first positioning plate 71 to clamp the frame 1, thereby locking the position of the slide bar 61; by rotating the pressing cam 74 in the opposite direction, the pressing cam 74 can release the pressure plate 73, thereby unlocking the slide bar 61.

[0037] The welding mechanism 4 and the dust collecting device 5 are both arranged on the frame 1. The welding mechanism 4 includes an adjustable mounting arm 41 and a welding machine 42. The adjustable mounting arm 41 is fixedly arranged on the frame 1, and the welding machine 42 is arranged at the end of the adjustable mounting arm 41. The adjustable mounting arm 41 can adopt a manipulator or an existing position adjustment mechanism, and the welding machine 42 adopts an existing welding machine.

[0038] The dust collecting device 5 includes a first dust collector 51 arranged at the lower end of the frame 1 and a second dust collector 52 arranged at the upper end of the frame 1. The first dust collector 51 and the second dust collector 52 are both slidably connected to the frame 1 to facilitate movement according to the welding position. The first dust collector 51 and the second dust collector 52 are connected to the same dust collecting box 53 through a pipeline.

[0039] Preferably, two first positioning mechanisms 2 are provided.

[0040] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A welding device for a fully welded ball valve body, characterized in that: It comprises a frame (1), a first positioning mechanism (2), a second positioning mechanism (3), a welding mechanism (4) and a dust collecting device (5); The first positioning mechanism (2) comprises a slewing ring (21) and two V-shaped positioning blocks (22) slidably arranged in the slewing ring (21); the slewing ring (21) is rotatably arranged on the frame (1); the two V-shaped positioning blocks (22) are symmetrical with respect to the center of the slewing ring (21); a driving gear (23) is rotatably arranged in the slewing ring (21); an end face toothed disc (24) meshing with the driving gear (23) is rotatably arranged on the slewing ring (21); the end face toothed disc (24) is drivingly connected to a first driving mechanism (26); the V-shaped positioning block (22) is fixedly connected to a screw rod (27) along a sliding direction; the driving gear (23) is provided with an internal thread that matches with the thread of the screw rod (27); teeth (28) are provided on the circumferential surface of the slewing ring (21); and a second driving mechanism (29) matching with the teeth (28) is provided on the frame (1); The second positioning mechanism (3) comprises two vertical slides (31) symmetrically arranged on the left and right, the vertical slides (31) being slidably connected to the frame (1), a bidirectional lead screw (11) being rotatably arranged on the frame (1), the two vertical slides (31) being respectively threadedly connected to two sides of the bidirectional lead screw (11), a sliding block (32) being slidably arranged on both upper and lower sides of the two vertical slides (31), a horizontally arranged positioning rod (33) being fixedly connected to the sliding block (32), and a positioning inclined plate being arranged at the end of the positioning rod (33) Block (34); both sides of the frame (1) are fixedly connected with a positioning frame (12), and the positioning frame (12) is rotatably provided with an adjusting gear I (13) and an adjusting gear II (14) coaxially and rotating in opposite directions; two positioning rods (33) located on the same side of the frame (1) are hinged with a rack (15), and the two racks (15) are respectively meshed with the adjusting gear I (13) or the adjusting gear II (14); the adjusting gear I (13) and the adjusting gear II (14) are connected with a third driving mechanism (16); The welding mechanism (4) and the dust collecting device (5) are both arranged on the frame (1).

2. A welding device for a fully welded ball valve body according to claim 1, characterized in that: The machine also comprises an inner support mechanism (6), wherein the inner support mechanism (6) comprises three horizontally arranged slide bars (61), the three slide bars (61) are slidably arranged on the frame (1), and the three slide bars (61) are not in the same straight line, a guide wheel (62) is rotatably arranged on the slide bar (61), and a locking mechanism (7) is arranged between the slide bar (61) and the frame (1).

3. A welding device for a fully welded ball valve body according to claim 1, characterized in that: The adjusting gear I (13) is rotatably mounted on the positioning frame (12) via a mounting shaft (17); the adjusting gear II (14) is rotatably mounted on the mounting shaft (17) via a sleeve (18); first bevel gears (19) are fixedly connected to the sides of the adjusting gear I (13) and the adjusting gear II (14) that are close to each other; and a second bevel gear (110) that meshes with the two first bevel gears (19) is rotatably mounted on the positioning frame (12).

4. A welding device for a fully welded ball valve body according to claim 3, characterized in that: The rear end of the frame (1) is rotatably provided with two reversing shafts (111), the two reversing shafts (111) are transmission-connected via a reversing gear (112), and the mounting shafts (17) on both sides of the frame (1) extend backwards and are transmission-connected to the reversing shaft (111) on the corresponding side via a synchronous belt (113); The third driving mechanism (16) comprises a driving motor, wherein a reversing shaft (111) is connected to the driving motor.

5. The welding device for a fully welded ball valve body according to claim 3, characterized in that: An elastic pressing plate (114) is provided on the positioning frame (12), and a side surface of the elastic pressing plate (114) is pressed against the bottom surface of the rack (15).

6. A welding device for a fully welded ball valve body according to claim 2, characterized in that: The locking mechanism (7) comprises a first positioning plate (71), a second positioning plate (72) and a pressure plate (73); the first positioning plate (71) and the second positioning plate (72) are both fixedly arranged on the slide bar (61); the pressure plate (73) is slidably arranged on the slide bar (61) and is located between the first positioning plate (71) and the second positioning plate (72); a clamping cam (74) cooperating with the pressure plate (73) is rotatably arranged on the second positioning plate (72).

7. The welding device for a fully welded ball valve body according to claim 1, characterized in that: The first drive mechanism (26) and the second drive mechanism (29) both comprise a control motor (210) and a driving gear (211); the driving gear (211) is fixedly connected to the motor shaft of the control motor (210); and the driving gear (211) is meshed with a corresponding end face toothed disc (24) or teeth (28).

8. The welding device for a fully welded ball valve body according to claim 1, characterized in that: The welding mechanism (4) comprises an adjustable mounting arm (41) and a welding machine (42); the adjustable mounting arm (41) is fixedly arranged on the frame (1); and the welding machine (42) is arranged at the end of the adjustable mounting arm (41).

9. The welding device for a fully welded ball valve body according to claim 1, characterized in that: The dust collecting device (5) comprises a first dust collector (51) arranged at the lower end of the frame (1) and a second dust collector (52) arranged at the upper end of the frame (1); the first dust collector (51) and the second dust collector (52) are both slidably connected to the frame (1); and the first dust collector (51) and the second dust collector (52) are connected to the same dust collecting box (53) via a pipeline.

10. The welding device for a fully welded ball valve body according to claim 1, characterized in that: Two first positioning mechanisms (2) are provided.

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