Protective dragging cover for titanium alloy pipeline welding
By designing a protective hood consisting of an outer protective body, a throat clamp, an air inlet pipe and a baffle, and using argon gas to protect the welding area, the problems of oxidation and unfused defects in the titanium alloy pipe welding process were solved, and high-quality welding effects were achieved.
Patent Information
- Application Number
- CN202422937002.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-29
AI Technical Summary
The existing titanium alloy pipeline welding process is prone to oxidation, interlayer lack of fusion defects and poor weld bead forming problems, especially in multi-layer welding, the welding quality is difficult to guarantee.
A protective hood consisting of an outer protective body, a throat clamp, an air inlet pipe and a baffle was designed. Argon gas was used to protect the welding area. The welding gun was fixed by the throat clamp, the baffle sealed the weld, the air inlet pipe was designed with an increasing inner diameter to reduce the gas flow rate, and the filter filtered and purified the argon gas to provide all-round protection.
It improves welding quality, prevents oxidation during welding, ensures good weld formation, is suitable for welding titanium alloys and other types of pipes, and improves welding efficiency and reliability.
Smart Images
Figure CN223368451U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of auxiliary protection for pipe welding, and particularly relates to a protective drag cover for titanium alloy pipeline welding. Background Art
[0002] When connecting and welding pipes together, the quality of the pipe end weld is of vital importance. For titanium alloy pipe welding, the conventional external protection method is to provide local protection through the fairing carried by the welding gun itself. After most pipes are welded, the high temperature caused by welding causes high-temperature oxidation at the rear, resulting in a decrease in welding quality. When performing multi-layer welding, oxidation on the upper surface may cause defects such as lack of fusion between layers. In summary, the existing welding protective cover is prone to defects during welding due to limitations of site factors, welding conditions, welding site and other factors. It is prone to oxidation, poor quality between layers, poor weld bead formation, and poor weld appearance color during the welding process. Summary of the Invention
[0003] The purpose of the utility model is to solve the problems existing in the prior art and provide a protective drag cover for titanium alloy pipe welding, which is easy to protect the welding seam of the pipe mouth when butt welding the titanium alloy pipe, and has a simple and reliable structure, is easy to operate, and is light and convenient.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective drag cover for titanium alloy pipe welding, comprising an outer protective body, a throat clamp, an air inlet pipe and a baffle;
[0005] The outer protection body is composed of a C-shaped base, the throat clamp is fixedly arranged at one end of the outer side of the outer protection body through a connecting neck, and the air inlet pipe is arranged at the other end of the outer side of the outer protection body;
[0006] An argon guide groove is provided at the bottom inner side of the outer protective body, and the air inlet pipe is connected to the argon guide groove; a filter fixing groove is also provided on the inner side of the outer protective body, and the filter fixing groove is arranged close to the argon guide groove, and the filter is installed on the outer protective body through the filter fixing groove; a baffle fixing groove is provided on each side of the inner side of the outer protective body, and a baffle is installed on each baffle fixing groove; a notch is also provided on the outer protective body near one end of the throat clamp.
[0007] Furthermore, the air intake pipe is a streamlined cylindrical air intake pipe, the air passage inside the air intake pipe is divided into multiple sections, and the inner diameter of the air passage increases successively from the air intake end to the air outlet end.
[0008] Furthermore, the notch is a semicircular notch, and the center of the semicircular notch is coaxially arranged with the center of the throat clamp.
[0009] Furthermore, the baffle is made of hard sealing rubber and has a C-shaped structure.
[0010] Furthermore, the included angle of the extension lines of the two ends of the outer protective body is 120°.
[0011] Furthermore, the throat clamp is an adjustable structure at both ends.
[0012] The utility model can fix the tungsten electrode argon arc welding gun in the argon arc welding gun fixing throat clamp so that the protective cover body is parallel to the welding gun; hard rubber sealing pads are installed on both sides and pressed tightly on both sides of the weld to achieve the protection effect before welding.
[0013] The utility model has a simple and reliable structure, is easy to operate, is light and convenient, can accurately align the weld position, create better welding conditions, improve work efficiency, and make the welding operation go more smoothly; the utility model can prevent the weld surface from being oxidized due to the heat of welding during the welding process, thereby improving the welding quality. It is not only suitable for titanium alloy pipe welding, but also suitable for welding of other types of pipes and teaching. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram (1) of the present utility model;
[0015] Figure 2 This is a schematic diagram (2) of the present utility model;
[0016] Figure 3 This is the schematic diagram (3) of the utility model. Figure 1 、 Figure 2 and Figure 3 The baffle is not shown in the figure;
[0017] Figure 4 for Figure 2 AA section view;
[0018] Figure 5 It is a three-dimensional diagram of the utility model;
[0019] Figure 6 This is a schematic diagram of the connection between the utility model and the argon arc welding gun. DETAILED DESCRIPTION
[0020] The following embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art will appreciate that the following embodiments are intended only to illustrate the present invention and should not be construed as limiting the scope of the present invention. Where specific techniques, connections, or conditions are not specified in the embodiments, the techniques, connections, and conditions described in the literature in the art or in accordance with the product specifications were followed. Materials, instruments, or equipment used, for which the manufacturer is not specified, are all commercially available conventional products.
[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "provided with" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.
[0022] Combine Figure 1-Figure 5 As shown, the utility model provides a protective drag cover for titanium alloy pipe welding, comprising an outer protective body 1, a throat clamp 2, an air inlet pipe 3 and a baffle 4; wherein,
[0023] The outer protective body 1 is composed of a C-shaped base made of aluminum alloy, with the angle between the extension lines of the two ends of the outer protective body 1 being 120°. The throat clamp 2 is fixedly mounted on one end of the outer side of the outer protective body 1 via a connecting neck 5, and the air inlet pipe 3 is mounted on the other end of the outer protective body 1. The utility model is fixedly connected to the argon arc welding gun 12 via the throat clamp 2. The throat clamp 2 is made of stainless steel and has an adjustable structure at both ends. At the beginning of welding, the welding gun is fixed in the argon arc welding fixed throat clamp and its built-in fixing bolts are tightened to prevent the protective device from accidentally falling off during welding. The welding gun and the device are at a parallel angle.
[0024] An argon guide groove 6 is provided at the bottom inner side of the outer protective body 1, and the air inlet pipe 3 is connected to the argon guide groove 6, which can facilitate the circulation of argon; a filter fixing groove 7 is also provided on the inner side of the outer protective body 1, and the filter fixing groove 7 is arranged close to the argon guide groove 6, and the filter 8 is installed on the outer protective body 1 through the filter fixing groove 7; a baffle fixing groove 9 is provided on each side of the inner side of the outer protective body 1, and a baffle 4 is installed on each baffle fixing groove 9; the baffle 4 is made of hard sealing rubber and has a C-shaped structure; after inspection, the hard sealing rubber is pressed against the weld before pipeline welding can be carried out; a notch 10 is also provided on the end of the outer protective body 1 close to the throat clamp 2.
[0025] As a further optimization solution, the air inlet pipe 3 is a streamlined cylindrical air inlet pipe, and the air channel 11 in the air inlet pipe is divided into multiple sections, and the inner diameter of the air channel 11 increases successively from the air inlet end to the air outlet end, which can effectively reduce the gas flow rate.
[0026] According to a further optimized solution, the notch 10 is a semicircular notch, and the center of the semicircular notch is coaxial with the center of the throat clamp 2 .
[0027] Due to the potential for crosswinds and other disruptive factors during welding, this utility model incorporates baffle mounting slots on both sides of the outer protective body to effectively reduce argon gas escape due to environmental factors, increase argon gas density, and thus enhance protection quality. Furthermore, to prevent turbulence caused by excessively fast argon gas flow entering the air duct, this utility model incorporates an airway with increasing inner diameter within the air intake to reduce flow velocity. A replaceable argon gas filter is installed within the base for secondary flow reduction, ensuring uniform argon gas protection of the weld surface.
[0028] The utility model is mainly suitable for protective porcelain sleeves No. 7 to No. 12 and pipe diameters of 40 to 120 mm. It is suitable for actual production and is particularly suitable for teaching and training operations in schools.
[0029] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A protective drag cover for titanium alloy pipeline welding, characterized in that: It comprises an outer protective body (1), a throat clamp (2), an air inlet pipe (3) and a baffle (4); The outer protection body (1) is composed of a C-shaped base, the throat clamp (2) is fixedly arranged at one end of the outer side of the outer protection body (1) through a connecting neck (5), and the air inlet pipe (3) is arranged at the other end of the outer side of the outer protection body (1); An argon guide groove (6) is provided at the bottom of the inner side of the outer protective body (1), and the air inlet pipe (3) is connected to the argon guide groove (6); a filter fixing groove (7) is also provided on the inner side of the outer protective body (1), and the filter fixing groove (7) is arranged close to the argon guide groove (6), and the filter (8) is installed on the outer protective body (1) through the filter fixing groove (7); a baffle fixing groove (9) is provided on each side of the inner side of the outer protective body (1), and a baffle (4) is installed on each baffle fixing groove (9); and a notch (10) is also provided at one end of the outer protective body (1) close to the throat clamp (2).
2. The protective drag cover for titanium alloy pipeline welding according to claim 1 is characterized in that: The air inlet pipe (3) is a streamlined cylindrical air inlet pipe, and the air channel (11) in the air inlet pipe is divided into multiple sections, and the inner diameter of the air channel (11) increases from the air inlet end to the air outlet end.
3. The protective drag cover for titanium alloy pipeline welding according to claim 1 is characterized in that: The notch (10) is a semicircular notch, and the center of the semicircular notch is coaxially arranged with the center of the throat hoop (2).
4. The protective drag cover for titanium alloy pipeline welding according to claim 1, characterized in that: The baffle (4) is made of hard sealing rubber and has a C-shaped structure.
5. The protective drag cover for titanium alloy pipeline welding according to claim 1 is characterized in that: The included angle of the extension lines of the two ends of the outer protective body (1) is 120°.
6. The protective drag cover for titanium alloy pipeline welding according to claim 1, characterized in that: The throat clamp (2) is an adjustable structure at both ends.