Circular pipeline welding equipment

Abstract

The utility model relates to round pipeline welding equipment, which comprises a welding machine main body, a welding wire conveying head, a welding gun, a motor vehicle and a positioning ring, the positioning ring is used for being sleeved on a round pipeline, the welding gun is connected with the welding machine main body through an electric wire, the welding machine main body is arranged on the motor vehicle, and the motor vehicle is arranged on the welding machine main body. The positioning ring is connected with a moving mechanism walking in the circumferential direction of the positioning ring, the welding wire conveying head and the welding gun are connected to the moving mechanism, the welding gun faces the circumferential face of the circular pipeline, and the positioning ring is provided with a plurality of abutting structures distributed in the circumferential direction of the positioning ring. The utility model aims to provide the circular pipeline welding equipment which can continuously finish the welding of the whole circumferential direction of the pipeline without changing the distance of the welding gun in a labor-saving manner, and solves the problems of poor quality and labor waste of two sections of pipelines during manual welding.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding, in particular to a circular pipeline welding device. Background Art

[0002] During the construction of circular pipes, such as petrochemical pipelines, two adjacent sections of pipe need to be welded together. This welding is typically done using argon arc welding (TAIW). TIG welding, also known as argon gas shielded welding, involves passing argon shielding gas around the arc welding process to isolate the air from the weld zone and prevent oxidation.

[0003] Argon arc welding (ATW) is a welding technique based on the principles of conventional arc welding. It utilizes argon gas to protect the metal welding material, melting it into a liquid state on the substrate through high current to form a molten pool, thereby achieving a metallurgical bond between the metal being welded and the welding material. The continuous supply of argon gas during high-temperature molten welding prevents the welding material from coming into contact with oxygen in the air, thereby preventing oxidation. Therefore, it is suitable for welding stainless steel and iron hardware. Existing methods for welding two sections of circular pipes involve manually moving a handheld welding torch, a wire feed head, and an argon gas output pipe along the circumference of the pipe. This method is not only laborious but also incapable of welding the entire circumference of the pipe in one go. Furthermore, the distance between the welding torch and the weld point cannot be maintained consistently during welding, resulting in poor weld quality consistency. Utility Model Content

[0004] The utility model aims to provide a circular pipe welding device which can save effort and continuously complete the welding of the entire circumference of the pipe while ensuring that the distance between the welding guns remains unchanged, thereby solving the problems of poor quality and laboriousness in manual welding of two sections of pipes.

[0005] The above technical problems are solved by the following technical solutions: A circular pipe welding device, comprising a welding machine body, a welding wire feeding head and a welding gun, characterized in that it also comprises a motor vehicle and a positioning ring, the positioning ring is used to be sleeved on the circular pipe, the welding gun is connected to the welding machine body through an electric wire, the welding machine body is installed on the motor vehicle, the positioning ring is connected to a moving mechanism that moves along the circumference of the positioning ring, the welding wire feeding head and the welding gun are connected to the moving mechanism, the welding gun faces the circumference of the circular pipe, and the positioning ring is provided with a plurality of circumferentially distributed positioning rings. The tightening structure is used to tighten the positioning ring against the circular pipe when the positioning ring is sleeved on the circular pipe so that the positioning ring and the circular pipe are coaxially fixed together. When in use, the circular pipe welding equipment is moved to the side of the circular pipe by a motor vehicle, the positioning ring is sleeved on the circular pipe, and the position of the positioning ring is adjusted until the welding gun is aligned with the butt joint of the two sections of circular pipes to be welded together and the position meets the requirements. The main body of the welding machine is started to weld while the moving mechanism moves along the circumference of the positioning ring at the required speed. When the moving mechanism moves 360 degrees, the welding of the entire butt joint of the circular pipe is completed. The utility model can automatically complete the welding of the circular pipe butt joint for one circle, and can maintain the same distance between the welding gun and the welding point at any angle, so that the weld is smooth and the welding quality is stable, which can avoid the harm of manual welding to human health.

[0006] Preferably, the motor vehicle is a tracked vehicle, which can better improve the passability in the event of unexpected travel.

[0007] Preferably, the mobile mechanism includes a mobile frame, at least three pairs of running wheels arranged on the mobile frame, a driving gear arranged on the mobile frame, a power mechanism for driving the driving gear to rotate, and a gear ring meshed with the driving gear, the gear ring is connected to the positioning ring, the gear ring and the positioning ring are coaxial, two pairs of the three pairs of running wheels are located at one axial end of the positioning ring, and the other pair of running wheels is located at the other axial end of the positioning ring, one of the two running wheels in the same pair of running wheels is located outside the positioning ring, and the other running wheel is located inside the positioning ring, and the two running wheels in the same pair of running wheels clamp the positioning ring. A specific structure of a mobile mechanism is provided.

[0008] Preferably, inner chamfered surfaces are provided at both axial ends of the inner circumference of the positioning ring, and outer chamfered surfaces are provided at both axial ends of the outer circumference of the positioning ring. The walking wheel located at one axial end of the positioning ring and located inside the positioning ring is supported on the inner chamfered surface at one end of the positioning ring, the walking wheel located at one axial end of the positioning ring and located outside the positioning ring is supported on the outer chamfered surface at one end of the positioning ring, the walking wheel located at the other axial end of the positioning ring and located inside the positioning ring is supported on the inner chamfered surface at the other end of the positioning ring, and the walking wheel located at the other axial end of the positioning ring and located outside the positioning ring is supported on the outer chamfered surface at the other end of the positioning ring. The walking wheel balances the chamfered surfaces and can play a role in axial positioning, preventing the moving mechanism from moving axially along the circumference of the positioning ring, which may cause deviation in the welding position and the occurrence of weld leakage.

[0009] Preferably, the tightening structure includes a base section connected to the positioning ring and an extrusion section threadedly connected to the base section, wherein the base section and the extrusion section are distributed radially along the positioning ring. When in use, the extrusion section is rotated to tighten the circular pipe and adjust the coaxiality of the circular pipe and the positioning ring.

[0010] Preferably, the tightening structures are arranged in two rows, the two rows of tightening structures being distributed axially along the locating ring, and the tightening structures in the same row being distributed circumferentially along the locating ring. This prevents the locating ring from tilting axially and causing misalignment between the locating ring and the circular pipe, thereby ensuring welding quality.

[0011] The utility model has the following advantages: no manual movement of the welding gun is required during welding, which saves labor, can maintain a consistent distance between the welding guns, can continuously complete the welding of the entire circumference of the pipeline, has good welding quality, and the welding equipment can automatically move unexpectedly without manual movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the present utility model;

[0013] Figure 2 It is a partial schematic diagram of the utility model.

[0014] In the figure: welding machine body 1, welding wire feeding head 2, welding gun 3, argon cylinder 4, motor 5, positioning ring 6, wire 7, argon gas output pipe 8, winding reel 9, moving mechanism 10, welding wire 11, jacking structure 12, base section 13, extrusion section 14, moving frame 15, traveling wheel 16, driving gear 17, ring gear 18, inner chamfered bevel 19, outer chamfered bevel 20. DETAILED DESCRIPTION

[0015] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0016] See also Figure 1 and Figure 2 A circular pipe welding device includes a welding machine body 1, a welding wire feed head 2, a welding gun 3, an argon gas cylinder 4, a motor vehicle 5, and a positioning ring 6. The motor vehicle is a tracked vehicle. The positioning ring is used to be mounted on the circular pipe. The welding gun is connected to the welding machine body via an electric wire 7, and the argon gas cylinder is provided with an argon gas output pipe 8. The welding machine body, argon gas cylinder, and a winding reel 9 (for winding the welding wire) are mounted on the motor vehicle. The positioning ring is connected to a moving mechanism 10 that moves along the circumference of the positioning ring. The welding wire feed head, welding gun, and the outlet end of the argon gas output pipe are connected to the moving mechanism. The welding wire 11 is automatically fed by the welding wire feed head. The welding gun is directed toward the circumference of the circular pipe. The positioning ring is provided with a plurality of tightening structures 12 distributed along the circumference of the positioning ring. The tightening structures are used to tighten the positioning ring against the circular pipe when the positioning ring is mounted on the circular pipe, thereby fixing the positioning ring coaxially with the circular pipe. The tightening structure comprises a base section 13 connected to the positioning ring and an extrusion section 14 threadedly connected to the base section. The base section and the extrusion section are arranged radially along the positioning ring. During use, the extrusion section is rotated to tighten the circular pipe and simultaneously adjust the coaxiality of the circular pipe and the positioning ring. The tightening structures are arranged in two rows, both arranged axially along the positioning ring. The tightening structures in the same row are distributed circumferentially along the positioning ring. The moving mechanism comprises a moving frame 15, four pairs of running wheels 16 mounted on the moving frame, a driving gear 17 mounted on the moving frame, a power mechanism (specifically, a motor) that drives the driving gears, and a ring gear 18 meshing with the driving gear. The ring gear is connected to the positioning ring and is coaxial with the positioning ring. Two pairs of running wheels are located at one axial end of the positioning ring, and the other two pairs of running wheels are located at the other axial end of the positioning ring. One of the two running wheels in a pair is located outside the positioning ring, and the other is located inside the positioning ring. Both running wheels in the same pair clamp the positioning ring. Inner chamfered surfaces 19 are provided at both axial ends of the inner circumference of the positioning ring, and outer chamfered surfaces 20 are provided at both axial ends of the outer circumference of the positioning ring. The walking wheel located at one axial end of the positioning ring and located inside the positioning ring is supported on the inner chamfered surface at one end of the positioning ring, the walking wheel located at one axial end of the positioning ring and located outside the positioning ring is supported on the outer chamfered surface at one end of the positioning ring, the walking wheel located at the other axial end of the positioning ring and located inside the positioning ring is supported on the inner chamfered surface at the other end of the positioning ring, and the walking wheel located at the other axial end of the positioning ring and located outside the positioning ring is supported on the outer chamfered surface at the other end of the positioning ring.

[0017] When in use, the circular pipe welding equipment is moved to the side of the circular pipe by a motor vehicle, the positioning ring is put on the circular pipe, and the position of the positioning ring is adjusted until the welding gun is aligned with the butt joint of the two sections of circular pipes to be welded together and the position meets the requirements. The welding machine body is started for welding and the moving mechanism moves along the circumference of the positioning ring at a required speed. When the moving mechanism moves 360°, the welding of the entire butt joint of the circular pipe is completed.

[0018] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A round pipe welding device, comprising a welding machine body, a welding wire feeding head and a welding gun, characterized in that: It also includes a motor vehicle and a positioning ring, the positioning ring is used to be sleeved on the circular pipe, the welding gun is connected to the welding machine body through an electric wire, the welding machine body is installed on the motor vehicle, the positioning ring is connected to a moving mechanism that moves along the circumference of the positioning ring, the welding wire feeding head and the welding gun are connected to the moving mechanism, the welding gun faces the circumference of the circular pipe, and the positioning ring is provided with a plurality of tightening structures distributed along the circumference of the positioning ring. The tightening structure is used to tighten the circular pipe when the positioning ring is sleeved on the circular pipe so that the positioning ring and the circular pipe are coaxially fixed together.

2. The round pipe welding equipment according to claim 1, characterized in that: The motor vehicle is a tracked vehicle.

3. The round pipe welding equipment according to claim 1, characterized in that: The moving mechanism includes a moving frame, at least three pairs of walking wheels arranged on the moving frame, a driving gear arranged on the moving frame, a power mechanism for driving the driving gear to rotate and a gear ring meshed with the driving gear, the gear ring is connected to the positioning ring, the gear ring and the positioning ring are coaxial, two pairs of walking wheels among the three pairs of walking wheels are located at one axial end of the positioning ring, and the other pair of walking wheels is located at the other axial end of the positioning ring, one of the two walking wheels in the same pair of walking wheels is located outside the positioning ring, and the other walking wheel is located inside the positioning ring, and the two walking wheels in the same pair of walking wheels clamp the positioning ring.

4. The round pipe welding equipment according to claim 3, characterized in that: Inner chamfered surfaces are provided at both axial ends of the inner circumference of the positioning ring, and outer chamfered surfaces are provided at both axial ends of the outer circumference of the positioning ring. The walking wheel located at one axial end of the positioning ring and located inside the positioning ring is supported on the inner chamfered surface at one end of the positioning ring, the walking wheel located at one axial end of the positioning ring and located outside the positioning ring is supported on the outer chamfered surface at one end of the positioning ring, the walking wheel located at the other axial end of the positioning ring and located inside the positioning ring is supported on the inner chamfered surface at the other end of the positioning ring, and the walking wheel located at the other axial end of the positioning ring and located outside the positioning ring is supported on the outer chamfered surface at the other end of the positioning ring.

5. The round pipe welding equipment according to claim 1, characterized in that: The tightening structure comprises a base section connected to the positioning ring and an extrusion section threadedly connected to the base section, and the base section and the extrusion section are distributed along the radial direction of the positioning ring.

6. The round pipe welding equipment according to claim 1, characterized in that: There are two rows of the tightening structures, which are distributed along the axial direction of the positioning ring, and the tightening structures in the same row are distributed along the circumferential direction of the positioning ring.

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