Protective device for circular seam welding of large titanium and zirconium coil pipes

Abstract

The utility model provides a protection device for circular seam welding of large titanium and zirconium coil pipes. The protection device is composed of a push rod with scales, a ventilation pipeline, a lifting ring nut, a metal ring component and a lead screw. The metal ring parts at the two ends of the lead screw are used for forming a closed area around a welding seam, a small amount of argon is introduced to precisely protect the welding seam, welding oxidation is prevented, and the welding seam forming quality is improved. The push rod is provided with scales, so that the welding seam position can be accurately positioned, argon consumption is reduced, and cost is reduced. The device is simple in structure, easy to mount and dismount, suitable for the welding process of large-size pipelines, especially suitable for welding protection of non-ferrous metals such as titanium and zirconium, and good in practical value and popularization prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of coil pipes, in particular to a protective device for girth welding of large titanium and zirconium coil pipes. Background Art

[0002] Pressure vessel reactors often utilize internal coils for heating or cooling. These coils require multiple long straight tubes that are circumferentially welded and then coiled together. Welding non-ferrous metals such as titanium and zirconium requires back-filling with argon gas for shielding. Failure to properly shield the weld seam during welding can lead to oxidation, resulting in poor weld quality.

[0003] For circumferential welds on short straight pipes, a handheld protective shield with a rod is typically used for tracking and positioning welding. However, for large coils, where a single straight pipe is over 10 meters long and must be bent directly on a pipe bender after welding, a handheld protective shield is completely ineffective in providing welding protection. Furthermore, if argon is completely introduced into the straight pipe for welding protection, significant amounts of argon gas are wasted. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the technical problems existing in the prior art, the present invention provides a protective device for circumferential seam welding of large titanium and zirconium coils, comprising a push rod, a ventilation pipe, a lifting ring nut, a metal ring component and a screw rod, wherein the lifting ring nuts are arranged at both ends of the screw rod, and the metal ring components are also arranged at both ends of the screw rod, the lifting ring nut on one side is connected to the push rod, and the metal ring component on one side is connected to the ventilation pipe, and the ventilation pipe is passed through the ventilation pipe.

[0006] As an optimal technical solution for a protective device for girth welding of large titanium and zirconium coil pipes, the push rod is a slender metal rod with a scale.

[0007] As an optimal technical solution for a protective device for girth welding of large titanium and zirconium coil pipes, the ventilation pipe is a plastic hose.

[0008] As an optimal technical solution for a protective device for annular seam welding of large titanium and zirconium coils, the metal ring component includes a large-diameter metal ring and a small-diameter metal ring, which are fixed to the screw rod through a hexagonal nut.

[0009] The beneficial effects of the present application are reflected in multiple aspects. First, the device structure is simple and practical. By setting the lifting ring nut, metal ring component, scale push rod and plastic hose, precise argon protection is achieved. Compared with the traditional full-pipe argon passing mode, the device only performs local argon protection in the weld area, significantly reducing the consumption of argon and saving costs. This local protection method avoids argon waste, reduces the operating cost in the welding process, and meets the requirements of economy and environmental protection.

[0010] Secondly, the device precisely positions the welding position through the scale push rod, ensuring that the weld is always located at the center of the argon protection area, greatly improving the accuracy and operability of the welding process. During the welding process, the weld is reliably protected by argon, avoiding the occurrence of welding oxidation problems, ensuring the quality of the weld and improving the overall quality and durability after welding. Especially when dealing with non-ferrous metal materials such as titanium and zirconium, the protection function of the device is more significant, effectively improving the welding quality and avoiding the problem of weld embrittlement or discoloration caused by oxidation.

[0011] In addition, the installation and disassembly of the device are very convenient. After completing the girth welding, the protection device can be easily pulled out, without affecting the normal use of the welding equipment and facilitating subsequent welding operations. The design of the pipe clamp makes the straight pipe fixation more stable, ensuring the argon protection effect during the welding process and enhancing the operation flexibility of the device, which is suitable for industrial applications in large equipment or complex environments. In summary, the design of the device not only optimizes the effect of argon protection, but also improves the convenience and economy of the welding process, providing a stable, efficient and environmentally friendly protection solution for titanium and zirconium large disc pipe girth welding. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor. Among them:

[0013] Figure 1 is the overall structure schematic diagram of the present application.

[0014] Figure legend: 1, push rod; 2, air pipe; 3, lifting ring nut; 4, large diameter metal ring; 5, small diameter metal ring; 6, hexagonal head nut; 7, screw; 8, pipe one; 9, pipe two; 10, pipe clamp. DETAILED DESCRIPTION

[0015] In order to make the above objects, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0016] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be practiced in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0017] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or mutually exclusive with other embodiments.

[0018] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in order to facilitate the description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0019] Please refer to Figure 1 The present application provides a protection device for large-scale disc pipe ring seam welding of titanium and zirconium, which is mainly used to solve the problems of waste of protective gas and weld oxidation during welding. The basic structure of the device includes a push rod 1, an air duct 2, a lifting ring nut 3, a metal ring component and a lead screw 7. Through the cooperation of these components, the device can provide a stable argon protection area during welding. The lead screw 7 is provided with a lifting ring nut 3 at both ends, which is convenient for positioning and fixing, and at the same time passes through two large-diameter metal rings, which are fixed on the lead screw 7 by a hexagonal head nut 6. An argon pipe hole is arranged on one side of the metal ring, and argon can enter the protection area around the ring seam through the hole, and the air duct 2 is connected by a plastic hose for stable and continuous delivery of argon.

[0020] During use, the lead screw 7 assembly is sent into the straight pipe tail end of the disc pipe through the push rod 1, ensuring that the welded ring seam is located in the center of the closed area formed by the two metal rings. During welding, argon is continuously introduced into the closed area through the plastic hose to form a gas barrier to protect the weld from oxidation. The device also includes a pipe clamp 10 for fixing the straight pipes together to ensure the stability of the argon protection during welding. The push rod 1 has a scale to accurately position the weld position, ensuring the accuracy and stability of the welding.

[0021] The components and material selection of the device are also carefully designed. The vent pipe 2 uses a durable plastic hose, which not only ensures the stability of the argon flow, but also makes the operation more convenient. The scale design on the push rod 1 makes the positioning more accurate. The combination of the large-diameter metal ring 4 and the small-diameter metal ring 5 is fixed by the hex head nut 6, which makes the device structure stable and convenient to move. Compared with the prior art, this protective device has a simple structure, uses less argon, significantly reduces the welding cost, and is easy to disassemble and reassemble, which is more flexible in operation.

[0022] Overall, this device effectively solves the argon protection problem in the welding of large titanium and zirconium coil ring seams through ingenious structural design, significantly improves the welding quality, and is particularly suitable for welding operation scenarios of large equipment. This protective device not only provides an economical and efficient solution for the welding process of titanium and zirconium materials, but also improves the safety and convenience of operation to some extent, and has wide application value.

[0023] The working principle of the present application is:

[0024] Pipe one 8 and pipe two 9 are two straight pipe sections to be welded, which are connected by ring seams to form a welding position. The device uses the lead screw 7, the eyelet nut 3 and the metal ring components to build a closed argon protection area around the joint of pipe one 8 and pipe two 9.

[0025] In the welding operation, the lead screw 7 assembly is sent into the tail end of the connection part of pipe one 8 and pipe two 9 through the push rod 1, and the welding position is aligned through the scale on the push rod 1 to ensure that the weld position is located in the center of the argon protection area formed by the two metal rings. The vent pipe 2 connects the plastic hose to slowly introduce argon into the protection area, gradually expel air, form a stable argon environment, prevent oxygen from entering the joint area, thereby avoiding weld oxidation. The pipe clamp 10 is used to fix pipe one 8 and pipe two 9 to ensure that the relative position of the two pipes remains unchanged during welding, ensuring the stability of the argon protection area. After welding is completed, the lead screw 7 assembly is pulled out of the pipe through the slender metal push rod 1, successfully completing the welding protection process.

[0026] The embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, which should be covered by the scope of the claims of the present application.

Claims

1. A protective device for girth welding of large titanium and zirconium coils, characterized in that: It includes a push rod, a ventilation pipe, a lifting ring nut, a metal ring component and a screw rod. The lifting ring nuts are arranged at both ends of the screw rod, and the metal ring components are also arranged at both ends of the screw rod. The lifting ring nut on one side is connected to the push rod, and the metal ring component on one side is connected to the ventilation pipe. The ventilation pipe is passed through the ventilation pipe.

2. The protective device for circumferential welding of large titanium and zirconium coil pipes according to claim 1 is characterized in that: The push rod is a slender metal rod with scales.

3. The protective device for circumferential welding of large titanium and zirconium coil pipes according to claim 1 is characterized in that: The ventilation pipe is a plastic hose.

4. The protective device for circumferential welding of large titanium and zirconium coil pipes according to claim 1 is characterized in that: The metal ring component comprises a large-diameter metal ring and a small-diameter metal ring, and the large-diameter metal ring and the small-diameter metal ring are fixed on the screw rod through hexagonal nuts.

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