A welding device applied to the valve body of a fully welded ball valve

Abstract

The present invention relates to the technical field of ball valve welding. More specifically, it relates to a welding device applied to a fully welded ball valve body, which includes a frame, a first positioning mechanism, a second positioning mechanism, a welding mechanism, and a dust suction device; the first positioning mechanism includes a rotary ring and two V-shaped positioning blocks slidably arranged inside the rotary ring; the second positioning mechanism includes two vertically arranged sliding plates symmetrically arranged left and right. Sliding blocks are slidably arranged on the upper and lower sides of the two vertically arranged sliding plates. A horizontally arranged positioning rod is fixedly connected to the sliding block, and a positioning inclined block is arranged at the end of the positioning rod; the welding mechanism and the dust suction device are both arranged on the frame. Through the first positioning mechanism and the second positioning mechanism, the present invention can achieve precise centering and clamping of first valve bodies and second valve bodies with different diameters, ensuring the consistency and accuracy of the welding positions, thereby improving the welding quality of the products.

Description

Technical Field

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

[0002] In the manufacturing process of fully welded ball valves, the connection strength and sealing performance 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 operations are prone to introducing human errors, especially when dealing with valve bodies of different sizes or complex shapes, increasing the production difficulty and the defective rate. At the same time, a large amount of smoke and harmful gases are 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 emerged 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 gases during the welding process.

[0004] The Chinese patent application with the publication number CN114346509A discloses a ball valve welding device and its welding method, which adsorbs components through an electromagnet and then clamps the components through arc-shaped clamping plates. Although it can achieve the positioning and clamping of the valve body, its structure is only applicable to small-sized valve bodies and cannot stably clamp large-sized valve bodies. And in order to ensure welding accuracy, the rotational speeds of two second motors need to be completely synchronized, resulting in a high cost of the motors.

[0005] The Chinese utility model patent with the publication number CN212918220U discloses a ball valve welding device, which drives an auxiliary plate to clamp a workpiece through the movement of a telescopic rod. Although it can achieve the fixation of the workpiece, it cannot achieve the accurate centering of two cylindrical components and cannot meet the positioning requirements of fully welded ball valves.

[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 applied to the body of a fully welded ball valve is provided, which has high positioning accuracy and can handle the smoke and dust generated during the welding process.

[0008] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0009] A welding device applied to the body of a fully welded ball valve includes a frame, a first positioning mechanism, a second positioning mechanism, a welding mechanism, and a dust suction device;

[0010] The first positioning mechanism includes a rotary ring and two V-shaped positioning blocks slidably arranged inside the rotary ring. The rotary ring is rotatably arranged on the frame. The two V-shaped positioning blocks are centrosymmetric with respect to the center of the rotary ring. A driving gear is rotatably arranged inside the rotary ring, and an end face gear disk meshing with the driving gear is rotatably arranged on the rotary ring. The end face gear disk is drivingly connected to a first driving mechanism; a screw rod is fixedly connected to the V-shaped positioning block along the sliding direction, and an internal thread in threaded cooperation with the screw rod is arranged on the driving gear; teeth are arranged on the circumferential surface of the rotary ring, and a second driving mechanism cooperating with the teeth is arranged on the frame;

[0011] The second positioning mechanism includes two vertical sliding plates arranged symmetrically left and right. The vertical sliding plates are slidably connected to the frame. A bidirectional lead screw is rotatably arranged on the frame. The two vertical sliding plates are respectively in threaded connection with two sides of the bidirectional lead screw. Sliding blocks are slidably arranged on the upper and lower sides of the two vertical sliding plates. A horizontally arranged positioning rod is fixedly connected to the sliding block, and a positioning inclined block is arranged at the end of the positioning rod; positioning frames are fixedly connected to both sides of the frame. An adjusting gear I and an adjusting gear II which are coaxial and rotate in opposite directions are rotatably arranged inside the positioning frame. Rack bars are hinged on two positioning rods on the same side of the frame. The two rack bars are respectively meshed with the adjusting gear I or the adjusting gear II. The adjusting gear I and the adjusting gear II are connected to a third driving mechanism;

[0012] The welding mechanism and the dust suction device are both arranged on the frame.

[0013] Preferably, an inner support mechanism is further included. The inner support mechanism includes three horizontally arranged sliding rods. The three sliding rods are slidably arranged on the frame and the three sliding rods are not on the same straight line. Guide wheels are rotatably arranged on the sliding rods, and a locking mechanism is arranged between the sliding rods and the frame.

[0014] Preferably, the adjusting gear I is rotatably arranged on the positioning frame through a mounting shaft, the adjusting gear II is rotatably arranged on the mounting shaft through a sleeve, first bevel gears are respectively fixedly connected to one sides of the adjusting gear I and the adjusting gear II close to each other, and a second bevel gear meshing with the two first bevel gears is rotatably connected to the positioning frame.

[0015] Preferably, two reversing shafts are rotatably arranged at the rear end of the frame. The two reversing shafts are drivingly connected through a reversing gear. The mounting shafts on both sides of the frame both extend rearward and are drivingly connected to the corresponding reversing shaft through a synchronous belt;

[0016] The third driving mechanism includes a driving motor, and one of the reversing shafts is connected to the driving motor.

[0017] Preferably, an elastic pressing plate is arranged on the positioning frame, and one side surface of the elastic pressing plate presses against the bottom surface of the rack bar.

[0018] 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 both 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 pressing cam cooperating with the pressure plate is rotatably arranged on the second positioning plate.

[0019] Preferably, both the first driving mechanism and the second driving mechanism 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 meshes with the corresponding end face tooth disc or tooth.

[0020] Preferably, the welding mechanism includes an adjustable mounting arm and a welding machine. The adjustable mounting arm is fixedly arranged on the machine frame, and the welding machine is arranged at the end of the adjustable mounting arm.

[0021] Preferably, the dust suction device includes a first dust collector arranged at the lower end of the machine frame and a second dust collector arranged at the upper end of the machine frame. The first dust collector and the second dust collector are both slidably connected to the machine frame, and the first dust collector and the second dust collector are connected to the same dust collection box through pipelines.

[0022] Preferably, two first positioning mechanisms are provided.

[0023] The beneficial effects of the present invention compared with the prior art are as follows:

[0024] Through the first positioning mechanism and the second positioning mechanism, the present invention can achieve precise centering and clamping of the first valve body and the second valve body with different diameters, ensuring the consistency and accuracy of the welding position, thereby improving the welding quality of the product. The first positioning mechanism realizes the central positioning of the first valve body through two V-shaped positioning blocks in the rotary ring, ensuring that the first valve bodies with different diameters can be accurately centered and clamped. The second positioning mechanism uses the vertically symmetrically arranged vertical sliding plates and the positioning rods and positioning inclined blocks on the sliding blocks to realize the stable support and positioning of the second valve body. By adjusting components such as adjusting gear I, adjusting gear II and the reversing gear, the positions of the four positioning inclined blocks can be synchronously adjusted to ensure accurate positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following will further elaborate on the specific implementation manners of the present invention through the drawings.

[0026] Figure 1 is a schematic diagram of the overall structure of one angle of the present invention;

[0027] Figure 2 is a schematic diagram of the overall structure of another angle of the present invention;

[0028] Figure 3 is a schematic diagram of the structure of the machine frame and the dust suction device;

[0029] Figure 4 Schematic diagram of the structure of the second positioning mechanism at an angle;

[0030] Figure 5 Schematic diagram of the structure of the second positioning mechanism at another angle;

[0031] Figure 6 For Figure 5 Partial enlarged view of A in

[0032] Figure 7 Schematic diagram of the structure of the third driving mechanism;

[0033] Figure 8 For Figure 7 Partial enlarged view of B in

[0034] Figure 9 Schematic diagram of the structure of the first positioning mechanism;

[0035] Figure 10 Schematic diagram of the internal structure of the first positioning mechanism.

[0036] 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 pressing plate, 2-first positioning mechanism, 21-rotating ring, 22-V-shaped positioning block, 23-driving gear, 24-end face gear disk, 26-first driving mechanism, 27-screw, 28-tooth, 29-second driving mechanism, 210-control motor, 211-driving gear, 3-second positioning mechanism, 31-vertical sliding plate, 32-sliding block, 33-positioning rod, 34-positioning inclined 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 collecting box, 6-inner support mechanism, 61-slide bar, 62-guide wheel, 7-locking mechanism, 71-first positioning plate, 72-second positioning plate, 73-pressure plate, 74-pressing cam. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment:

[0039] AsFigures 1 to 10 As shown in the figure, a welding device applied to the valve body of a fully welded ball valve 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 joint surfaces of the first valve body and the second valve body, and the dust suction device 5 is used to absorb the dust and gas generated during the welding process.

[0040] The first positioning mechanism 2 includes a rotary ring 21 and two V-shaped positioning blocks 22 slidably arranged in the rotary ring 21. The rotary ring 21 is rotatably arranged on the frame 1. Tooth teeth 28 are arranged on the circumferential surface of the rotary ring 21, and a second driving mechanism 29 cooperating with the tooth teeth 28 is arranged on the frame 1.

[0041] The two V-shaped positioning blocks 22 are centrosymmetric with respect to the center of the rotary ring 21. A driving gear 23 is rotatably arranged in the rotary ring 21. An end face gear disc 24 meshing with the driving gear 23 is rotatably arranged on the rotary ring 21. The end face gear disc 24 is drivingly connected to a first driving mechanism 26.

[0042] In this embodiment, both the first driving mechanism 26 and the second driving mechanism 29 include a control motor 210 and a driving gear 211. Specifically, the second driving 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, and the first driving gear meshes with the tooth teeth 28. By driving the first driving gear to rotate through the first control motor, the rotary ring 21 is driven to rotate through the tooth teeth 28. The first driving mechanism 26 includes a second control motor and a second driving gear. The second control motor is fixedly arranged on the rotary ring 21, and the second driving gear is arranged on the motor shaft of the second control motor and meshes with the end face gear disc 24. By driving the second driving gear to rotate through the second control motor, the end face gear disc 24 is driven to rotate.

[0043] Both of the two V-shaped positioning blocks 22 are fixedly connected with a screw rod 27 along the sliding direction. Internal threads matching with the screw rod 27 are arranged on the driving gear 23. When the end face gear disc 24 rotates, the driving gear 23 is driven to rotate, and then the screw rod 27 and the V-shaped positioning blocks 22 are driven to move linearly. By adjusting the distance between the two V-shaped positioning blocks 22, centering positioning and clamping of first valve bodies with different diameters can be performed.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] In order to clamp second valve bodies of different sizes, the vertical slide plate 31 is slidably connected to the frame 1. A bidirectional lead screw 11 is rotatably arranged on the frame 1. The two vertical slide plates 31 are respectively threadedly connected to both sides of the bidirectional lead screw 11. Preferably, the bidirectional lead screw 11 is connected to a motor, and the motor drives the bidirectional lead screw 11 to rotate, thereby driving the two vertical slide plates 31 to move synchronously and in opposite directions, and adjusting the distance between the positioning inclined blocks 34 on both sides.

[0049] Preferably, it further includes an inner support mechanism 6. The inner support mechanism 6 includes three horizontally arranged sliding rods 61. The three sliding rods 61 are slidably arranged on the frame 1, and the three sliding rods 61 are not on the same straight line. Guide wheels 62 are rotatably arranged on the sliding rods 61. A locking mechanism 7 is arranged between the sliding rods 61 and the frame 1.

[0050] 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 relatively fix the two. Then, move the positions of the three sliding rods 61 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 gear I 13 and the adjusting gear II 14 to rotate in opposite directions to loosen the positioning inclined block 34 from 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.

[0051] Preferably, the locking mechanism 7 includes 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 sliding rod 61. The pressure plate 73 is slidably arranged on the sliding rod 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, the pressing cam 74 presses the pressure plate 73, so that the pressure plate 73 can cooperate with the first positioning plate 71 to clamp the frame 1, thereby locking the position of the sliding rod 61; by rotating the pressing cam 74 in the reverse direction, the pressing cam 74 can loosen the pressure plate 73 to unlock the sliding rod 61.

[0052] The welding mechanism 4 and the dust suction 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 adjusting mechanism, and the welding machine 42 adopts an existing welding machine.

[0053] The dust suction 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, which is convenient for moving according to the welding position. The first dust collector 51 and the second dust collector 52 are connected to the same dust collection box 53 through pipes.

[0054] Preferably, two first positioning mechanisms 2 are provided.

[0055] The above only describes the preferred embodiments of the present invention in detail. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention, and all such changes should be included within the scope of protection of the present invention.

Claims

1. A welding device applied to the valve body of a fully welded ball valve, characterized in that: It 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) includes a rotary ring (21) and two V-shaped positioning blocks (22) slidably arranged in the rotary ring (21). The rotary ring (21) is rotatably arranged on the frame (1). The two V-shaped positioning blocks (22) are centrosymmetric with respect to the center of the rotary ring (21). A driving gear (23) is rotatably arranged in the rotary ring (21). An end face gear disk (24) meshing with the driving gear (23) is rotatably arranged on the rotary ring (21). The end face gear disk (24) is drivingly connected to a first driving mechanism (26); A screw rod (27) is fixedly connected to the V-shaped positioning block (22) along the sliding direction. The driving gear (23) is provided with an internal thread threadedly matched with the screw rod (27); Tooth teeth (28) are arranged on the circumferential surface of the rotary ring (21). A second driving mechanism (29) matched with the tooth teeth (28) is arranged on the frame (1); The second positioning mechanism (3) includes two vertical sliding plates (31) symmetrically arranged left and right. The vertical sliding plates (31) are slidably connected to the frame (1). A bidirectional lead screw (11) is rotatably arranged on the frame (1). The two vertical sliding plates (31) are respectively threadedly connected to both sides of the bidirectional lead screw (11). Sliding blocks (32) are slidably arranged on the upper and lower sides of the two vertical sliding plates (31). A horizontally arranged positioning rod (33) is fixedly connected to the sliding block (32). A positioning inclined block (34) is arranged at the end of the positioning rod (33); Positioning frames (12) are fixedly connected to both sides of the frame (1). An adjusting gear I (13) and an adjusting gear II (14) which are coaxial and rotate in opposite directions are rotatably arranged in the positioning frame (12). Rack bars (15) are hinged on the two positioning rods (33) on the same side of the frame (1). The two rack bars (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 to a third driving mechanism (16); The welding mechanism (4) and the dust suction device (5) are both arranged on the frame (1); It further includes an inner support mechanism (6). The inner support mechanism (6) includes 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 on the same straight line. Guide wheels (62) are rotatably arranged on the slide bars (61). A locking mechanism (7) is arranged between the slide bars (61) and the frame (1); The adjusting gear I (13) is rotatably arranged on the positioning frame (12) through a mounting shaft (17). The adjusting gear II (14) is rotatably arranged on the mounting shaft (17) through a sleeve (18). First bevel gears (19) are respectively fixedly connected to the sides of the adjusting gear I (13) and the adjusting gear II (14) close to each other. A second bevel gear (110) meshing with the two first bevel gears (19) is rotatably connected to the positioning frame (12); 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.

2. The welding device applied to the valve body of a fully welded ball valve according to claim 1, 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).

3. A welding device applied to the valve body of a fully welded ball valve according to claim 1, 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).

4. A welding device applied to the valve body of a fully welded ball valve 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).

5. A welding device applied to the valve body of a fully welded ball valve 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).

6. 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.

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

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