A multi-angle welding device for welding return oil pipes

Abstract

This utility model relates to the field of industrial equipment welding automation, and particularly to a multi-angle welding device for welding return oil pipes. The device includes a welding machine and a ball-end rod. The welding machine is equipped with a welding head and a controller. A connecting plate is slidably connected to the welding machine, and a mounting plate is connected to the front of the connecting plate. One end of the ball-end rod is ball-jointed to the mounting plate, and an external thread is provided on the outer ring of the middle portion. An operating component is threadedly connected to the ball-end rod via the external thread. A push rod is slidably connected inside the ball-end rod, with the end of the push rod near the operating component protruding from the ball-end rod. A mounting rod is slidably connected to the end of the ball-end rod away from the mounting plate, and a clamp is connected to the mounting rod. Through the ball-joint connection structure between the ball-end rod and the mounting plate, combined with the external thread adjustment function of the operating component, the ball-end rod can rotate at multiple angles within the mounting plate. This allows the clamp to flexibly adjust the welding angle of the return oil pipe, directly solving the clamping alignment problem caused by differences in the curvature of the return oil pipe and improving the applicability of the clamping mechanism.

Description

Technical Field

[0001] This utility model relates to the field of industrial equipment welding automation, and in particular to a multi-angle welding device for welding return oil pipes. Background Technology

[0002] In the field of industrial equipment manufacturing and maintenance, pipeline welding is a key process to ensure the system's sealing, pressure resistance, and functional stability. Especially for the welding of return oil pipes on the top of equipment, traditional manual welding suffers from problems such as high operational difficulty, low welding efficiency, and poor quality consistency. With the development of automation technology, the welding of return oil pipes on the top of industrial equipment is gradually evolving towards automation and intelligence; however, existing technologies still face the dual challenges of structural adaptation and process optimization.

[0003] Existing automated welding equipment typically employs a three-step operation mode of "clamping-positioning-welding": the return oil pipe is fixed in a preset position by mechanical grippers, the pipe end is aligned with the equipment opening using mechanical limiting devices, and finally, continuous welding is completed by the welding torch moving around the workpiece. This type of equipment performs stably in standardized pipeline welding. However, in practical applications, the return oil pipe often exhibits different curvatures due to installation environment, pipeline routing, or material properties. Existing clamping mechanisms can only accommodate specific curvature ranges, necessitating manual pre-adjustment, heat straightening, or the addition of auxiliary tooling to correct the pipe curvature before welding, in order to match the fixed angle and opening alignment requirements of the equipment clamping system.

[0004] Furthermore, the variability in the curvature of the return oil pipe necessitates personalized adjustments before each batch of welding, significantly increasing production preparation time and labor costs. Moreover, forced correction may disrupt the original stress distribution of the pipeline, leading to quality issues such as post-weld deformation and weld cracking. Existing equipment struggles to guarantee the clamping stability of pipelines with complex curvatures, affecting weld formation accuracy and sealing performance. Therefore, there is an urgent need to develop a multi-angle welding device that can adapt to the curvature of multi-angle return oil pipes, achieving rapid, accurate positioning and stable welding, in order to overcome the limitations of existing technology in adapting to pipeline curvature. Utility Model Content

[0005] To overcome the shortcomings of insufficient adaptability, this utility model provides a multi-angle welding device for welding return oil pipes, aiming to solve the above-mentioned shortcomings.

[0006] A multi-angle welding device for welding return oil pipes includes a welding machine and a ball-end rod. The welding machine is equipped with a welding head and a controller. A connecting plate is slidably connected to the welding machine. The welding machine is equipped with an electric slide rail for driving the connecting plate to slide up and down. A mounting plate is connected to the front side of the connecting plate. One end of the ball-end rod is ball-jointed to the mounting plate. An external thread is provided on the outer ring of the middle part of the ball-end rod. An operating component is threadedly connected to the ball-end rod through the external thread. A push rod is slidably connected inside the ball-end rod. The push rod is close to the operating component. One end of the component protrudes from the ball joint rod. The operating component is press-fitted with the end of the push rod. The push rod is press-fitted with the inner wall of the mounting plate. The end of the ball joint rod away from the mounting plate is slidably connected to a mounting rod. The mounting rod is connected to a clamp. A top block is slidably connected to the outer side of the ball joint rod. The operating component has a cavity for the movement of the top block. An inclined surface is provided at the end of the cavity near the top block. The operating component is wedge-shapedly engaged with the top block through the inclined surface. The top block is slidably connected to and press-fitted with the mounting rod.

[0007] Furthermore, a base is connected to the side of the mounting plate, and a return spring is provided inside the base. A contact plate is slidably connected to one end of the base facing the ball head rod. One end of the return spring is connected to the contact plate, and the other end is connected to the base. The side of the contact plate away from the return spring is slidably connected to the ball head rod.

[0008] Furthermore, a rubber pad is connected to the end of the top rod that contacts the mounting plate.

[0009] Furthermore, the outer ring of the handle of the operating component is provided with several anti-slip grooves.

[0010] Furthermore, a limit cover is connected to the end of the ball joint away from the mounting plate, and the limit cover is in a limiting fit with the end of the operating component.

[0011] Furthermore, the outer side of the operating component is provided with an identification groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. Through the ball joint connection structure between the ball head rod and the mounting plate, and in conjunction with the external thread adjustment function of the operating part, the ball head rod can rotate at multiple angles within the mounting plate, thereby driving the clamp to flexibly adjust the welding angle of the return oil pipe, directly solving the clamping alignment problem caused by the difference in the curvature of the return oil pipe, and achieving the purpose of improving the applicability of clamping.

[0014] 2. Through the wedge-shaped fit design of the operating parts, top rod, and top block, combined with the sliding and pressing relationship between the top block and the mounting rod, the position of the clamp can be precisely adjusted, allowing the mounting rod to slide along the axial direction of the ball head rod. With the adjustment of the ball head rod angle, the end of the return oil pipe is precisely fitted with the equipment opening.

[0015] 3. The elastic damping system of the return spring and the contact plate provides moderate friction when the ball head rotates, which allows for slow angle adjustment while avoiding uncontrolled rotation. At the same time, the arc-shaped groove at the end of the contact plate fits into the curved surface of the ball head, ensuring stable and controllable rotation and improving operational safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is an exploded view of the installation structure of the connecting plate and mounting plate of this utility model.

[0018] Figure 3 This is a cross-sectional view showing the connection relationship between the ball head and the top rod of this utility model.

[0019] Figure 4 This is a sectional view of the installation structure of the operating component and the thread of this utility model.

[0020] Figure 5 This is an exploded view of the mounting structure of the base and the reset spring of this utility model.

[0021] In the attached diagrams: 1: Welding machine, 2: Welding head, 3: Controller, 4: Fixture, 5: Connecting plate, 6: Mounting plate, 7: Ball head rod, 8: Top rod, 9: Operating component, 10: External thread, 11: Mounting rod, 12: Top block, 13: Inclined surface, 14: Base, 15: Return spring, 16: Contact plate, 17: Rubber pad, 18: Anti-slip groove, 19: Limit cover, 20: Marking groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: A multi-angle welding device for welding return oil pipes, such as... Figures 1-5As shown, the assembly includes a welding machine 1, a welding head 2, a controller 3, a fixture 4, a connecting plate 5, a mounting plate 6, a ball joint rod 7, a push rod 8, an operating component 9, an external thread 10, a mounting rod 11, and a top block 12. The welding machine 1 is equipped with the welding head 2 and the controller 3. The connecting plate 5 is slidably connected to the welding machine 1. The welding machine 1 is equipped with an electric slide rail that drives the connecting plate 5 to slide up and down. The electric slide rail is wired to the controller 3. The mounting plate 6 is connected to the front of the connecting plate 5. One end of the ball joint rod 7 is ball-jointed to the mounting plate 6, and the outer ring of the middle part is provided with an external thread 10. The operating component 9 is threaded to the ball joint rod 7 through the external thread 10. The push rod 8 is slidably connected inside the ball joint rod 7. The end of the push rod 8 near the operating component 9 protrudes from the ball joint rod 7. The operating component 9 and the end of the push rod 8 are connected... The upper rod 8 is pressed together with the inner wall of the mounting plate 6. The inner wall of the mounting plate 6 is polished to reduce friction loss with the upper rod 8. The end of the ball head rod 7 away from the mounting plate 6 is slidably connected to the mounting rod 11. The mounting rod 11 is connected to the clamp 4. The outer side of the ball head rod 7 is slidably connected to the upper block 12. The operating part 9 has a cavity for the movement of the upper block 12. The end of the cavity near the upper block 12 is provided with an inclined surface 13. The upper block 12 is made of high-hardness alloy material and has been surface carburized to ensure sufficient static friction with the mounting rod 11 and wear resistance. The operating part 9 is wedge-shaped with the upper block 12 through the inclined surface 13. The angle of the inclined surface 13 is optimized by simulation to balance the thrust transmission efficiency and self-locking stability. The upper block 12 is slidably connected to the mounting rod 11 and pressed together.

[0024] like Figure 2 , Figure 3 and Figure 5 As shown, it also includes a base 14, a return spring 15, and a contact plate 16. The mounting plate 6 is connected to the side of the base 14, and the return spring 15 is installed inside the base 14. The contact plate 16 is slidably connected to one end of the base 14 facing the ball head rod 7. One end of the return spring 15 is connected to the contact plate 16, and the other end is connected to the base 14. The side of the contact plate 16 away from the return spring 15 is slidably connected to the ball head rod 7. The end of the contact plate 16 is provided with an arc-shaped groove that matches the curved surface of the ball head rod 7. It is made of wear-resistant nylon material to achieve stable fit and low-friction sliding.

[0025] like Figure 3 As shown, it also includes a rubber pad 17. The end of the top rod 8 that contacts the mounting plate 6 is connected to the rubber pad 17. The rubber pad 17 is made of high-temperature resistant silicone rubber, which can adapt to the temperature changes in the welding heat-affected zone and maintain its elastic deformation capability.

[0026] like Figure 3 As shown, the handle of the operating component 9 has several anti-slip grooves 18 around its outer ring, which increases the friction of the hand when gripping and avoids stress concentration.

[0027] like Figure 2 and Figure 3As shown, it also includes a limiting cover 19. The end of the ball head rod 7 away from the mounting plate 6 is connected to the limiting cover 19. The limiting cover 19 is in a limiting fit with the end of the operating member 9. The limiting cover 19 is made of high-strength aluminum alloy and has a threaded locking groove on the inner wall to prevent the operating member 9 from being over-rotated and causing the thread to fail.

[0028] like Figure 3 As shown, the outer side of the operating component 9 is provided with an indicator groove 20, which is a red ring-shaped arrow, making it easy for staff to quickly identify the tightening operation direction.

[0029] The operator first places the pipe connection equipment stably on the welding machine 1 table, then vertically inserts the return oil pipe into the inner cavity of the clamp 4. The controller 3 activates the built-in cylinder thrust system of the clamp 4, causing the clamp 4 to retract and form a stable clamping force, ensuring that the return oil pipe does not move axially during welding. At this point, the relative position of the end of the return oil pipe to the equipment opening is determined. If the end has naturally conformed to the edge of the opening, the welding head 2's start program is directly triggered to perform continuous circumferential welding.

[0030] When there is a vertical deviation in the return oil pipe, the controller 3 drives the electric slide rail to move the connecting plate 5 vertically. The mounting plate 6 on the front side of the connecting plate 5 rises and falls accordingly, while the clamp 4 and the return oil pipe rise and fall synchronously. After the vertical adjustment is completed, the welding head 2 runs along the preset trajectory to complete the welding. At this time, the end of the return oil pipe is precisely aligned with the equipment opening.

[0031] If there is angular tilt or rotational deviation, the cylinder thrust must first be adjusted to a moderately relaxed state via controller 3 to reduce the constraint strength of clamp 4 on the return oil pipe. The operator holds the handle of operating part 9 and applies rotational force. Through the engagement of external thread 10, operating part 9 rotates out along the axial direction of ball joint 7, gradually releasing the pressure on the end of push rod 8. At this time, the pressure between the rubber pad 17 at the end of push rod 8 and the inner wall of mounting plate 6 decreases, and ball joint 7 gains rotational freedom within mounting plate 6. During rotation, the anti-slip groove 18 on the surface of the handle enhances the grip friction. At this time, the return spring 15 continuously applies elastic pressure to ball joint 7 through contact plate 16, forming a moderate damping effect, which allows ball joint 7 to slowly rotate and adjust the angle while preventing it from losing control due to rotational inertia.

[0032] While the ball joint rod 7 rotates to adjust the angle of the clamp 4, the axial retraction of the operating piece 9 simultaneously releases the squeezing constraint on the top block 12. The radial clamping force of the top block 12 on the mounting rod 11 decreases, allowing the mounting rod 11 to slide axially along the ball joint rod 7 to adjust the front and rear positions of the clamp 4. Through the coordinated operation of the rotation of the ball joint rod 7 and the sliding of the mounting rod 11, the return oil pipe achieves precise micro-adjustment of its spatial posture along with the clamp 4 until its end is completely fitted with the equipment opening without any gap.

[0033] After adjustment, the operator rotates the operating component 9 in the opposite direction to push it along the ball joint 7 towards the mounting plate 6. The end of the operating component 9 re-presses the top rod 8, and the rubber pad 17 at the end of the top rod 8 undergoes elastic deformation under pressure, forming a stable contact surface with the inner wall of the mounting plate 6 to lock the angle of the ball joint 7; at the same time, the wedge-shaped engagement between the inner inclined surface 13 of the operating component 9 and the top block 12 pushes the top block 12 to move towards the mounting rod 11. After the top block 12 deforms, it generates static friction with the surface of the mounting rod 11 to lock the position of the mounting rod 11.

[0034] The limit cover 19 restricts the axial movement of the operating component 9 to prevent excessive rotation that could lead to threaded connection failure; the marking groove 20 provides directional indication to help workers quickly identify the tightening direction. After welding is completed, the controller 3 releases the cylinder thrust, the clamp 4 opens, and the worker smoothly removes the welded pipe connection equipment, completing the entire welding process.

[0035] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A multi-angle welding device for welding a return pipe, characterized by: The assembly includes a welding machine (1) and a ball joint rod (7). The welding machine (1) is equipped with a welding head (2) and a controller (3). The welding machine (1) is slidably connected to a connecting plate (5). The welding machine (1) is provided with an electric slide rail that drives the connecting plate (5) to slide up and down. A mounting plate (6) is connected to the front side of the connecting plate (5). One end of the ball joint rod (7) is ball-jointed to the mounting plate (6). An external thread (10) is provided on the outer ring of the middle part. An operating component (9) is threaded to the ball joint rod (7) through the external thread (10). A push rod (8) is slidably connected inside the ball joint rod (7). The end of the push rod (8) near the operating component (9) protrudes from the ball joint rod. Outside the rod (7), the operating member (9) is pressed against the end of the top rod (8), the top rod (8) is pressed against the inner wall of the mounting plate (6), the ball head rod (7) is slidably connected to the mounting rod (11) at the end away from the mounting plate (6), the mounting rod (11) is connected to the clamp (4), the ball head rod (7) is slidably connected to the top block (12), the operating member (9) has a cavity for the movement of the top block (12), the cavity is provided with an inclined surface (13) at the end near the top block (12), the operating member (9) is wedge-shaped with the top block (12) through the inclined surface (13), the top block (12) is slidably connected to and pressed against the mounting rod (11).

2. A multi-angle welding device for welding an oil return pipe according to claim 1, characterized in that: The mounting plate (6) is connected to a base (14) on its side. A return spring (15) is provided inside the base (14). A contact plate (16) is slidably connected to one end of the base (14) facing the ball head rod (7). One end of the return spring (15) is connected to the contact plate (16), and the other end is connected to the base (14). The side of the contact plate (16) away from the return spring (15) is slidably connected to the ball head rod (7).

3. The multi-angle welding device for welding of oil return pipe according to claim 1, characterized in that: A rubber pad (17) is connected to one end of the top rod (8) that contacts the mounting plate (6).

4. The multi-angle welding device for oil return pipe welding according to claim 1, characterized in that: The operating component (9) has several anti-slip grooves (18) around the outer ring of the handle.

5. The multi-angle welding device for oil return pipe welding according to claim 1, characterized in that: The end of the ball joint (7) away from the mounting plate (6) is connected to a limiting cover (19), and the limiting cover (19) is in a limiting fit with the end of the operating member (9).

6. A multi-angle welding device for welding return oil pipes according to claim 1, characterized in that: The operating component (9) has an identification groove (20) on its outer side.

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