An angle-variable butt joint device for elbow welding

Abstract

The present invention relates to the technical field of elbow welding, and in particular to an angle-variable docking device for elbow welding. The present invention provides an angle-variable docking device for elbow welding that can quickly and synchronously adjust the angle according to the elbow docking situation to improve the docking accuracy. An angle-variable docking device for elbow welding includes a fixed seat, a mounting seat, a sliding cylinder, an angle adjustment mechanism and a docking mechanism. The mounting seat is connected to the middle position of the top of the fixed seat, and the left and right parts of the mounting seat are slidingly connected to the sliding cylinder. The sliding cylinder is provided with an angle adjustment mechanism, and the sliding cylinder is provided with a docking mechanism. The present invention rotates the steering wheel to make the worm drive the corresponding turbine to rotate, and then the second gear drives the first gear to rotate slowly. During the slow rotation of the first gear, it will synchronously drive the rotating ring to rotate, and then the elbow rotates slowly to adjust the angle and dock, thereby improving the docking accuracy during elbow welding.

Description

Technical Field

[0001] The present invention relates to the technical field of elbow welding, and in particular to an angle-variable butt joint device for elbow welding. Background Art

[0002] Welding is a manufacturing process that uses heat or high pressure to join metals or other thermoplastic materials. The essence of welding is the process of joining two or more materials through atomic or molecular bonding and diffusion. During welding, the workpiece and solder melt to form a molten zone. Once the molten pool cools and solidifies, a connection is formed. Pipe elbow welding is a metal pipe welding process, but unlike straight pipe welding, elbow welding requires particular attention to the accuracy of the butt joint during welding due to its special shape. Imprecise butt joints can lead to defects in the elbow weld. Therefore, during pipe elbow welding, the elbow must be positioned and adjusted according to the required welding angle. After adjustment, the worker uses a welding torch to apply a high-temperature spray to the elbow joint to fuse the joints. The joints are then allowed to cool, allowing the elbows to connect. While existing equipment can effectively weld elbows, it is difficult to quickly and continuously adjust the angle of the elbow joint. Furthermore, it is difficult to maintain synchronous butt joint adjustment during the adjustment process, which reduces the accuracy of the joint.

[0003] Based on this, in order to solve the above problems, a multi-angle docking device for elbow welding is now developed, which can quickly adjust the synchronous angle according to the elbow docking situation and improve the docking accuracy. Summary of the Invention

[0004] In order to overcome the shortcomings of existing devices that are difficult to quickly and continuously adjust the elbow joint angle when performing elbow joint, and it is difficult to maintain synchronous adjustment of the elbow joint during the adjustment process, which will reduce the joint accuracy, the technical problem to be solved is: to provide an angle-variable joint device for elbow welding that can quickly and synchronously adjust the angle according to the elbow joint situation and improve the joint accuracy.

[0005] The technical solution of the present invention is: an angle-variable docking device for elbow welding, including a fixed seat, a mounting seat, a sliding cylinder, an angle adjustment mechanism and a docking mechanism. The mounting seat is connected to the middle position of the top of the fixed seat, and the left and right parts of the mounting seat are slidably connected to the sliding cylinder. The sliding cylinder is provided with an angle adjustment mechanism for adjusting the welding angle of the elbow, and the sliding cylinder is provided with a docking mechanism for driving the sliding cylinders to approach each other for docking.

[0006] The cam is connected to the first gear of the driving member and the gear is connected with the first gear of the driving member and the gear is connected with the gear to move the gears to the first and second gears respectively.

[0007] Optionally, the docking mechanism includes a connecting piece, a second fixed frame, a bidirectional screw, a pulley assembly and a driving motor. The sliding cylinder is connected to connecting pieces on the front and rear sides, and the second fixed frame is connected to the bottom of the mounting seat. The second fixed frame is rotatably connected to the bidirectional screw on the front and rear sides. The front bidirectional screw and the front connecting piece are threadedly connected, and the rear bidirectional screw and the rear connecting piece are also threadedly connected. The right part of the second fixed frame is connected to the driving motor, and the output shaft of the driving motor is set to the left, and the output shaft of the driving motor is connected to the bidirectional screw on the rear side, and a pulley assembly is connected between the bidirectional screws.

[0008] Optionally, a supporting mechanism is also included, which includes a first connecting rod, a fastening bolt, a second connecting rod, a placement ring, a clamping ring and a second clamping bolt. The lower sides of the mounting plates that are away from each other are rotatably connected to the first connecting rod, and the fastening bolts for improving stability are rotatably connected to the first connecting rod. The fastening bolts are threadedly connected to the corresponding mounting plates, and the second connecting rod is rotatably connected to the first connecting rod. A fastening bolt is also installed between the first connecting rod and the adjacent second connecting rod. The upper front side of the second connecting rod is connected to a placement ring for placing the outer end of the bent pipe, and the placement ring is rotatably connected to a clamping ring for limiting the outer end of the bent pipe, and a second clamping bolt is slidably connected between the clamping ring and the placement ring.

[0009] Optionally, a clamping mechanism is also included, which includes a connecting frame, a fixed guide frame, a lifting frame, a pressure ring and a spring. The rear side of the sliding cylinder is connected to the connecting frame, the rear side of the upper part of the mounting seat is connected to the fixed guide frame, the connecting frame is slidably connected to the lifting frame, the rear side of the lifting frame is slidably connected to the fixed guide frame, the front side of the lifting frame that is away from each other is slidably connected to a pressure ring for clamping and limiting the bent pipe, and two left and right springs are connected between the pressure ring and the adjacent lifting frame, and the springs are wound around the adjacent pressure rings.

[0010] Optionally, a protective mechanism is also included, which includes a first protective frame, a second protective frame and a third protective frame. The sides of the front connecting parts away from each other are connected to the first protective frame for protecting the second gear and the turbine, and the sides of the rear connecting parts away from each other are connected to the second protective frame for protecting the first gear and the second gear. The front side of the second protective frame is rotatably connected to the third protective frame for protecting the first gear and the rotating ring.

[0011] Optionally, an eye protection mechanism is also included, which includes an adjusting part and goggles. The rear side of the second protective frame on the left is connected to an adjusting part that can be bent to adjust the angle, and the front end of the adjusting part is connected to goggles for shielding and protecting the workers' eyes.

[0012] Optionally, the pulley assembly includes a pulley and a transmission belt, the middle position of the bidirectional screw is connected to a pulley, and the transmission belt is wound between the pulleys.

[0013] The beneficial effects of the present invention are: 1. The present invention causes the worm to drive the corresponding turbine to rotate by rotating the steering wheel, thereby causing the second gear to drive the first gear to rotate slowly. During the slow rotation of the first gear, the rotating ring will be driven to rotate synchronously, thereby causing the bent pipe to rotate slowly, and the angle of the bent pipe to be adjusted according to the docking situation, thereby improving the docking accuracy during the elbow welding.

[0014] 2. The present invention drives the bidirectional screw rods to start rotating by driving the motor output shaft, so that the connecting parts are automatically close to each other, and then the sliding cylinders are automatically close to each other, achieving the effect of automatic approach and docking of the bent pipes, thereby improving the docking efficiency.

[0015] 3. The present invention adjusts the first connecting rod and the second connecting rod so that the first connecting rod and the second connecting rod can adapt to elbows of different shapes. Then, the clamping ring and the placement ring cooperate to press and support the outer end of the elbow to prevent the elbow from tilting during welding due to the lack of support at the outer end being too heavy.

[0016] 4. The present invention drives the connecting frames closer to each other through the sliding cylinder, so that the connecting frames drive the lifting frames closer to each other. At this time, the lifting frames will slide downward under the guidance of the fixed guide frame, so that the pressure ring and the spring cooperate to press and fix the bent pipe, thereby improving the stability of the bent pipe during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the angle adjustment mechanism of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the angle adjustment mechanism of the present invention.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the docking mechanism of the present invention.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the support mechanism of the present invention.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the pressing mechanism of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the protection mechanism of the present invention.

[0025] Figure 9 It is a schematic diagram of the three-dimensional structure of the eye protection mechanism of the present invention.

[0026] Markings in the accompanying drawings: 1_fixed seat, 2_mounting seat, 3_sliding cylinder, 4_angle adjustment mechanism, 41_first fixed frame, 42_rotating ring, 43_first gear, 44_mounting plate, 45_pressing half ring, 46_first clamping bolt, 47_second gear, 48_turbine, 49_worm, 410_bearing frame, 411_steering plate, 5_docking mechanism, 51_connecting piece, 52_second fixed frame, 53_bidirectional screw, 54_pulley assembly, 55_driving motor, 6_support mechanism, 61_first connecting rod, 62_fastening bolt, 63_second connecting rod, 64_placing ring, 65_clamping ring, 66_second clamping bolt, 7_pressing mechanism, 71_connecting frame, 72_fixed guide frame, 73_lifting frame, 74_pressing ring, 75_spring, 8_protective mechanism, 81_first protective frame, 82_second protective frame, 83_third protective frame, 9_eye protection mechanism, 91_adjusting part, 92_goggles. DETAILED DESCRIPTION

[0027] The following description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0028] Example 1

[0029] A device for welding elbows with variable angles, such as Figure 1 and Figure 2As shown, it includes a fixed base 1, a mounting base 2, a sliding cylinder 3, an angle adjustment mechanism 4 and a docking mechanism 5. The mounting base 2 is welded to the middle position on the top of the fixed base 1, and the left and right parts of the mounting base 2 are slidably connected with the sliding cylinder 3. The sliding cylinder 3 is provided with an angle adjustment mechanism 4, which is used to adjust the welding angle of the bent pipe. The sliding cylinder 3 is provided with a docking mechanism 5, which is used to drive the sliding cylinders 3 to approach each other for docking.

[0030] It should be noted that when performing elbow welding, the two elbows need to be fixed, and then the elbow joints are welded by a welding gun to achieve the effect of elbow welding. First, the elbows are placed on the angle adjustment mechanism 4 respectively, and the docking mechanism 5 is controlled to make the sliding cylinders 3 close to each other, so that the elbows are close to each other, and then the welding gun is used to dock the elbows. During the docking process, the angle adjustment mechanism 4 is continuously controlled to adjust the welding position to achieve the effect of angle-variable docking and improve welding efficiency.

[0031] like Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, the angle adjustment mechanism 4 includes a first fixed frame 41, a rotating ring 42, a first gear 43, a mounting plate 44, a clamping half ring 45, a first clamping bolt 46, a second gear 47, a turbine 48, a worm 49, a bearing frame 410 and a steering wheel 411. The top of the sliding cylinder 3 is welded with a first fixed frame 41, and the top of the first fixed frame 41 is rotatably connected to the rotating ring 42. The first fixed frame 41 can guide the rotating ring 42 to rotate. The side of the rotating ring 42 away from each other is connected to the first gear 43. The side of the rotating ring 42 away from each other is welded with a mounting plate 44. The mounting plate 44 is used to place the elbow, and the upper side of the mounting plate 44 close to each other is rotated. The fixing seat 1 is connected with a clamping half ring 45, which is used to clamp and limit the bent pipe. The parts of the sliding cylinder 3 that are away from each other are rotatably connected with a turbine 48. The turbine 48 is connected with a second gear 47. The second gear 47 can mesh with the adjacent first gear 43. The second gear 47 is rotatably connected with the adjacent sliding cylinder 3. The upper sides of the left and right parts of the fixing seat 1 are slidably connected with front and rear symmetrical bearing frames 410. The bearing frames 410 are interconnected with the sliding cylinder 3 that are close to each other. A worm 49 is rotatably connected between the two adjacent bearing frames 410. The worm 49 can mesh with the adjacent turbine 48, and the front side of the worm 49 is connected with a steering wheel 411.

[0032] It should be noted that, in the process of butt welding of elbows, it is necessary to constantly adjust the welding angle of the elbows. Conventional adjustment methods are inconvenient and require workers to use their hands to adjust and fix, resulting in reduced docking accuracy. Therefore, when using this device to solve the above problem, it is necessary to first pull the first clamping bolts 46 to the side away from each other, and then make the clamping half rings 45 no longer locked, and then rotate the clamping half rings 45 to open, and after opening, place the elbow on the mounting plate 44, and after it is placed stably, rotate the clamping half ring 45 to reset, and push the first clamping bolt 46 to the side close to each other to reset, so that the elbows are clamped and fixed, and then push the sliding cylinder 3 to approach each other, so that the first fixing frame 41 drives the rotating ring 42 to approach each other, so that the mounting plate 44 drives the elbow close to docking, and at the same time the bearing frame 410 will The worm gears 49 are driven to approach each other, thereby preventing the first gear 43 from being disengaged from the second gear 47. After the docking is completed, the corresponding worm gear 49 is rotated by controlling the steering wheel 411 to rotate, driving the corresponding turbine 48 to rotate. At this time, the second gear 47 will start to rotate, thereby causing the first gear 43 to drive the adjacent rotating ring 42 to rotate, and the rotation of the rotating ring 42 will drive the adjacent mounting plate 44 to rotate, thereby achieving the effect of adjusting the angle of the bent pipe and improving the docking accuracy of the bent pipe. In summary, by rotating the steering wheel 411, the worm gear 49 drives the corresponding turbine 48 to rotate, thereby causing the second gear 47 to drive the first gear 43 to rotate slowly. During the slow rotation of the first gear 43, the rotating ring 42 will be driven to rotate synchronously, thereby causing the bent pipe to rotate slowly, perform angle adjustment docking, and improve the docking accuracy during elbow welding.

[0033] like Figure 1 and Figure 5 As shown, the docking mechanism 5 includes a connecting piece 51, a second fixed frame 52, a bidirectional screw rod 53, a pulley assembly 54 and a driving motor 55. The front and rear sides of the sliding cylinder 3 are connected to the connecting piece 51. The second fixed frame 52 is welded to the bottom of the mounting base 2. The front and rear sides of the second fixed frame 52 are rotatably connected to the bidirectional screw rod 53. The front bidirectional screw rod 53 is threadedly connected to the front connecting piece 51, and the rear bidirectional screw rod 53 is also threadedly connected to the rear connecting piece 51. The driving motor 55 is connected to the right part of the second fixed frame 52 by bolts. The output shaft of the driving motor 55 is connected to the bidirectional screw rod 53 on the rear side. A pulley assembly 54 is connected between the bidirectional screw rods 53. The pulley assembly 54 includes a pulley and a transmission belt. A pulley is connected to the middle position of the bidirectional screw rod 53, and a transmission belt is wound around the pulleys.

[0034] It should be noted that when welding the bent pipes, it is rather laborious to manually push the sliding cylinders 3 closer to each other so that the bent pipes are closer to each other, and this may cause the bent pipes to shake, reducing the docking accuracy. In order to solve the above problem, the driving motor 55 can now be started to rotate the bidirectional screw rod 53 on the rear side. At the same time, the bidirectional screw rod 53 on the rear side will drive the pulley assembly 54 to operate, so that the bidirectional screw rod 53 on the front side also starts to rotate synchronously. Since the bidirectional screw rod 53 and the corresponding connecting member 51 are both threadedly connected, when the screw rod starts to rotate, it will drive the corresponding connecting member 51 closer to each other, so that the sliding cylinders 3 all start to automatically approach each other, thereby improving the docking efficiency. In summary, the bidirectional screw rod 53 is driven by the output shaft of the driving motor 55 to start rotating, so that the connecting member 51 is automatically approached, and then the sliding cylinders 3 can automatically approach each other, achieving the effect of automatic approach and docking of the bent pipes, thereby improving the docking efficiency.

[0035] like Figure 1 and Figure 6 As shown, it also includes a support mechanism 6, which includes a first connecting rod 61, a fastening bolt 62, a second connecting rod 63, a placement ring 64, a clamping ring 65 and a second clamping bolt 66. The lower side of the mounting plate 44 away from each other is rotatably connected to the first connecting rod 61, and the first connecting rod 61 is rotatably connected to the fastening bolt 62. The fastening bolt 62 is threadedly connected to the corresponding mounting plate 44. Rotating the fastening bolt 62 can make the first connecting rod 61 fit more tightly with the adjacent mounting plate 44. , it is difficult to rotate, the first connecting rod 61 is rotatably connected to the second connecting rod 63, and a fastening bolt 62 is also installed between the first connecting rod 61 and the adjacent second connecting rod 63. A placement ring 64 is welded on the upper side of the front of the second connecting rod 63. The placement ring 64 is used to place the outer end of the elbow (that is, the end away from each other). A clamping ring 65 is rotatably connected to the placement ring 64. The clamping ring 65 is used to limit the outer end of the elbow, and a second clamping bolt 66 is slidably connected between the clamping ring 65 and the placement ring 64.

[0036] It should be noted that, in the process of welding the elbow, it is mentioned above that the elbow needs to be placed stably. In order to avoid the outer end (i.e., the end away from each other) of the elbow from being tilted due to excessive weight when the elbow is placed, the outer end of the elbow needs to be supported and placed. First, the worker adjusts the fastening bolt 62 according to the specific shape of the elbow so that the first connecting rod 61 and the second connecting rod 63 are no longer in a locked and unable to rotate state. Then, the first connecting rod 61 and the second connecting rod 63 are rotated and adjusted so that the first connecting rod 61 and the second connecting rod 63 can adapt to the approximate shape of the elbow. Then, the fastening bolt 62 is rotated to tighten the first connecting rod 61 and the second connecting rod The rod 63 is fixed and locked, and then the second bolt 66 is pulled out, and the snap ring 65 is opened so that the outer end of the bent pipe can be placed on the placement ring 64. After it is placed stably, the snap ring 65 is rotated and reset to press the outer end of the bent pipe, and then the second bolt 66 is inserted back into its original position and the snap ring 65 is locked. In summary, by adjusting the first connecting rod 61 and the second connecting rod 63, the first connecting rod 61 and the second connecting rod 63 can be adapted to bent pipes of different shapes, and then the snap ring 65 cooperates with the placement ring 64 to press and support the outer end of the bent pipe to prevent the bent pipe from tilting due to the lack of support at the outer end due to excessive weight during welding.

[0037] like Figure 1 and Figure 7 As shown, it also includes a clamping mechanism 7, which includes a connecting frame 71, a fixed guide frame 72, a lifting frame 73, a pressure ring 74 and a spring 75. The rear side of the sliding cylinder 3 is connected to the connecting frame 71, and a fixed guide frame 72 is welded to the rear side of the upper part of the mounting seat 2. The connecting frame 71 is slidably connected to the lifting frame 73. The rear side of the lifting frame 73 is slidably connected to the fixed guide frame 72 and is guided by the fixed guide frame 72 during the sliding process. The front side of the lifting frame 73 that is away from each other is slidably connected to the pressure ring 74. The pressure ring 74 is used to clamp and limit the bent pipe. Two left and right springs 75 are connected between the pressure ring 74 and the adjacent lifting frame 73.

[0038] When the locking cam 73 is in the unlocking state, the locking cam 73 is in the unlocking state, and the locking cam 73 is in the unlocking state, so that the winch 72 is locked and the winch 72 is unlocked, and the winch 72 is unlocked, so that the winch 72 can be unlocked and the winch 72 is unlocked.

[0039] like Figure 1 and Figure 8 As shown, a protective mechanism 8 is also included, and the protective mechanism 8 includes a first protective frame 81, a second protective frame 82 and a third protective frame 83. The sides of the front connecting members 51 that are away from each other are connected to the first protective frame 81 by bolts, and the sides of the rear connecting members 51 that are away from each other are connected to the second protective frame 82 by bolts, and the front sides of the second protective frames 82 are rotatably connected to the third protective frames 83.

[0040] It should be noted that in the process of adjusting the angle of the bent pipe, the first gear 43, the second gear 47 and the turbine 48 need to cooperate with each other to achieve the adjustment effect. Therefore, the above components need to be shielded and protected to prevent dust and foreign matter from entering between the components and affecting the mutual cooperation between the components. The front side of the second gear 47 and the turbine 48 is shielded and protected by the first protective frame 81, the rear side of the first gear 43 and the second gear 47 is shielded and protected by the second protective frame 82, and the front side of the first gear 43 and the rotating ring 42 is shielded and protected by the third protective frame 83 to prevent foreign matter from entering between the components and affecting the use of the components.

[0041] like Figure 1 and Figure 9 As shown, it also includes an eye protection mechanism 9, which includes an adjusting member 91 and goggles 92. The rear side of the second protective frame 82 on the left is connected to the adjusting member 91, and the adjusting member 91 can be bent at multiple angles to adjust the angle. The front end of the adjusting member 91 is connected to the goggles 92.

[0042] It should be noted that during the elbow welding process, the strong light generated between the welding gun and the elbow will cause damage to the worker's eyes. Therefore, eye protection equipment is required during the welding process. Conventional equipment worn on the head or handheld will make it inconvenient for workers to observe the work. Therefore, by directly pulling the adjusting part 91, the adjusting part 91 can be bent and deformed, so that the goggles 92 can be placed between the elbow welding point and the worker's eyes for protection, thereby improving the convenience of use and facilitating the workers to perform welding work.

[0043] The above embodiments are provided to persons familiar with the art for implementing or using the present invention. Personnel familiar with the art may make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the scope of protection of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A device for welding bend pipes with variable angles, comprising a fixed seat (1), a mounting seat (2) and a sliding cylinder (3), wherein the middle position of the top of the fixed seat (1) is connected to the mounting seat (2), and the left and right parts of the mounting seat (2) are slidably connected to the sliding cylinder (3), characterized in that: It also includes an angle adjustment mechanism (4) and a docking mechanism (5), wherein the sliding cylinder (3) is provided with an angle adjustment mechanism (4) for adjusting the welding angle of the bent pipe, and the sliding cylinder (3) is provided with a docking mechanism (5) for driving the sliding cylinders (3) to approach each other for docking; The angle adjustment mechanism (4) includes a first fixed frame (41), a rotating ring (42), a first gear (43), a mounting plate (44), a pressing half ring (45), a first clamping bolt (46), a second gear (47), a turbine (48), a worm (49), a bearing frame (410) and a steering wheel (411). The top of the sliding cylinder (3) is connected to the first fixed frame (41), the top of the first fixed frame (41) is rotatably connected to the rotating ring (42), the side of the rotating ring (42) away from each other is connected to the first gear (43), the side of the rotating ring (42) away from each other is connected to the mounting plate (44) for placing the bent pipe, and the upper side of the mounting plate (44) close to each other is rotatably connected to the mounting plate for placing the bent pipe. The bent pipe is compressed and limited by a clamping half ring (45), and a portion of the sliding cylinder (3) that is away from each other is rotatably connected to a turbine (48), and the turbine (48) is connected to a second gear (47) that can mesh with the adjacent first gear (43), and the second gear (47) is rotatably connected to the adjacent sliding cylinder (3). The upper sides of the left and right parts of the fixed seat (1) are slidably connected to front and rear symmetrical bearing frames (410), and the bearing frames (410) are connected to the sliding cylinder (3) that is close to each other. A worm (49) that can mesh with the adjacent turbine (48) is rotatably connected between the two adjacent bearing frames (410), and the front side of the worm (49) is connected to a steering wheel (411) that is easy to control the rotation. The supporting mechanism (6) further comprises a first connecting rod (61), a fastening bolt (62), a second connecting rod (63), a placement ring (64), a snap ring (65) and a second clamping bolt (66). The lower side of a portion of the mounting plate (44) that is away from each other is rotatably connected to the first connecting rod (61). The first connecting rod (61) is rotatably connected to a fastening bolt (62) for improving stability. The fastening bolt (62) is threadedly connected to the corresponding mounting plate (44). The first connecting rod (61) is rotatably connected to the second connecting rod (63), a fastening bolt (62) is also installed between the first connecting rod (61) and the adjacent second connecting rod (63), the front upper side of the second connecting rod (63) is connected to a placement ring (64) for placing the outer end of the bent pipe, the placement ring (64) is rotatably connected to a clamping ring (65) for limiting the outer end of the bent pipe, and a second clamping bolt (66) is slidably connected between the clamping ring (65) and the placement ring (64); The invention also includes a clamping mechanism (7), which includes a connecting frame (71), a fixed guide frame (72), a lifting frame (73), a pressure ring (74) and a spring (75). The rear side of the sliding cylinder (3) is connected to the connecting frame (71), the rear side of the upper part of the mounting seat (2) is connected to the fixed guide frame (72), the connecting frame (71) is slidably connected to the lifting frame (73), the rear side of the lifting frame (73) is slidably connected to the fixed guide frame (72), the front side of the lifting frame (73) away from each other is slidably connected to the pressure ring (74) for clamping and limiting the bent pipe, and the pressure ring (74) and the adjacent lifting frame (73) are connected between the left and right springs (75), and the springs (75) are wound around the adjacent pressure rings (74).

2. The angle-variable butt joint device for elbow welding according to claim 1, characterized in that: The docking mechanism (5) includes a connecting member (51), a second fixed frame (52), a bidirectional screw rod (53), a pulley assembly (54) and a driving motor (55). The sliding cylinder (3) is connected to the connecting member (51) on both the front and rear sides. The bottom of the mounting seat (2) is connected to the second fixed frame (52). The second fixed frame (52) is rotatably connected to the bidirectional screw rod (53) on both the front and rear sides. The bidirectional screw rod (53) on the front side is threadedly connected to the connecting member (51) on the front side. The bidirectional screw rod (53) on the rear side is also threadedly connected to the connecting member (51) on the rear side. The right part of the second fixed frame (52) is connected to the driving motor (55). The output shaft of the driving motor (55) is set to the left. The output shaft of the driving motor (55) is connected to the bidirectional screw rod (53) on the rear side. The pulley assembly (54) is connected between the bidirectional screw rods (53).

3. The angle-variable butt joint device for elbow welding according to claim 2, characterized in that: The invention also includes a protection mechanism (8), which includes a first protection frame (81), a second protection frame (82) and a third protection frame (83), wherein the side of the front connecting member (51) away from each other is connected to the first protection frame (81) for protecting the second gear (47) and the turbine (48), and the side of the rear connecting member (51) away from each other is connected to the second protection frame (82) for protecting the first gear (43) and the second gear (47), and the front side of the second protection frame (82) is rotatably connected to the third protection frame (83) for protecting the first gear (43) and the rotating ring (42).

4. The angle-variable butt joint device for elbow welding according to claim 3, characterized in that: The eye protection mechanism (9) further comprises an adjusting member (91) and goggles (92), the rear side of the second protective frame (82) on the left side is connected to the adjusting member (91) capable of bending and adjusting the angle, and the front end of the adjusting member (91) is connected to the goggles (92) for shielding and protecting the eyes of the worker.

5. The angle-variable butt joint device for elbow welding according to claim 2, characterized in that: The pulley assembly (54) includes a pulley and a transmission belt. The middle position of the bidirectional screw rod (53) is connected to a pulley, and the transmission belt is wound between the pulleys.

Images