Titanium alloy pipeline girth welding protection device

Abstract

A titanium alloy pipeline girth welding protection device comprises a welding protection cover (1) placed above a titanium alloy pipeline welding seam (100), a welding gun head connecting rod (2) is arranged on the welding protection cover (1), and a gas inlet pipeline (3) used for introducing protection gas is arranged at the top of the welding protection cover (1). The welding device has the advantages that the welding seam and a heat affected zone are prevented from being in contact with air through the welding protection cover during welding, and the welding quality of the titanium alloy pipeline is improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical equipment, in particular to a titanium alloy pipeline girth welding protection device. Background Art

[0002] At present, argon arc welding uses argon as a shielding gas to form a protective layer around the arc welding area to prevent oxidation of the weld area. Argon can effectively isolate the air and prevent the welding material from contacting with oxygen, thereby preventing oxidation of the weld and heat-affected zone. When welding titanium alloy pipes, the existing welding equipment lacks an argon temporary storage area, so the weld and heat-affected zone in a high-temperature state during titanium alloy welding are very easy to oxidize, affecting the welding quality. Utility Model Content

[0003] The purpose of the utility model is to provide a titanium alloy pipeline girth welding protection device in view of the above-mentioned shortcomings.

[0004] The utility model comprises a welding protection cover which is placed above the welding seam of a titanium alloy pipeline. A welding gun head connecting rod is arranged on the welding protection cover, and an air inlet pipeline for introducing protective gas is arranged on the top of the welding protection cover.

[0005] The welding protection cover is cylindrical, and the bottom of the welding protection cover is provided with an arc-shaped fitting surface matched with the titanium alloy pipe.

[0006] The inner top surface of the welding protection cover is provided with multiple layers of stainless steel mesh, and the outlet end of the air inlet pipe is located above the stainless steel mesh.

[0007] The multi-layer stainless steel mesh is fixed in the welding protection cover by an annular pressure ring.

[0008] After the stainless steel mesh is installed, the annular pressing ring is pressed on the stainless steel mesh, and the annular pressing ring is welded to the inner wall of the welding protection cover by spot welding.

[0009] The annular pressure ring is a spring sheet, which is installed in the welding protection cover to prevent it from falling through tension.

[0010] An arc-shaped groove is opened on the outer wall of the welding protection cover, a rubber protective sleeve is arranged in the arc-shaped groove, and a welding gun head connecting rod is detachably installed in the rubber protective sleeve.

[0011] An internal thread is arranged in the rubber protective sleeve, an external thread is arranged on the outer wall of the welding gun head connecting rod, and the welding gun head connecting rod thread is installed in the rubber protective sleeve.

[0012] The air intake duct is welded to the top center of the welding shield.

[0013] A high temperature resistant silicone sealing ring is arranged on the arc-shaped fitting surface.

[0014] The utility model has the advantages that during welding, the welding protective cover is used to ensure that the weld and the heat-affected zone are prevented from contacting with air, thereby improving the welding quality of the titanium alloy pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model when welding titanium alloy pipelines.

[0016] Figure 2 It is a schematic diagram of the structure of the utility model.

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", etc. appear in the description of the present invention, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] As shown in the accompanying drawings, the utility model comprises a welding protection cover 1 placed 15-20 mm above the titanium alloy pipe weld 100, a welding gun head connecting rod 2 is arranged on the welding protection cover 1, and an air inlet pipe 3 for introducing protective gas is arranged on the top of the welding protection cover 1.

[0024] The welding protection cover 1 is cylindrical, and the bottom of the welding protection cover 1 is provided with an arc-shaped fitting surface 4 that matches the titanium alloy pipe. Since the titanium alloy pipe is cylindrical, the arc-shaped fitting surface 4 can fit the outer wall of the titanium alloy pipe well.

[0025] A multi-layer stainless steel mesh 5 is arranged on the inner top surface of the welding protection cover 1 , and the outlet end of the air inlet pipe 3 is located above the stainless steel mesh 5 .

[0026] The multi-layer stainless steel mesh 5 is fixed in the welding protection cover 1 through the annular pressing ring 6 .

[0027] After the stainless steel mesh 5 is loaded, the annular pressing ring 6 is pressed on the stainless steel mesh 5, and the annular pressing ring 6 is welded to the inner wall of the welding protection cover 1 by spot welding. The stainless steel mesh 5 is fixedly installed.

[0028] The annular pressing ring 6 is a spring sheet, which is inserted into the welding protection cover 1 to prevent it from falling through tension. The stainless steel mesh 5 is detachably installed.

[0029] An arc-shaped groove is formed on the outer wall of the welding protection cover 1 , a rubber protective sleeve 7 is arranged in the arc-shaped groove, and the welding gun head connecting rod 2 is detachably installed in the rubber protective sleeve 7 .

[0030] An internal thread is arranged in the rubber protective sleeve 7 , an external thread is arranged on the outer wall of the welding gun head connecting rod 2 , and the welding gun head connecting rod 2 is threadably installed in the rubber protective sleeve 7 .

[0031] The air intake duct 3 is welded at the top center of the welding protection cover 1 .

[0032] A high temperature resistant silicone sealing ring is provided on the arc-shaped fitting surface 4. The high temperature resistant silicone sealing ring is used to make the arc-shaped fitting surface 4 and the titanium alloy pipe contact more closely, and the gas will not leak.

[0033] Embodiment 1: As attached Figure 1As shown, during welding, the staff screws the welding gun head into the welding gun head connecting rod 2, and the threaded connection is fixed. The welding gun head faces the titanium alloy pipe weld 100. The staff holds the welding gun and performs circular motion around the titanium alloy pipe weld 100 to weld. During welding, the arc-shaped fitting surface 4 of the welding protective cover 1 is close to the outer wall of the titanium alloy pipe and rotates with the welding gun. During welding, the protective gas is continuously introduced into the welding protective cover 1 through the air intake pipe 3, so that the protective gas always acts on the titanium alloy pipe weld 100. The top surface of the welding protective cover 1 is provided with multiple layers of stainless steel mesh 5, which are blocked by the multiple layers of stainless steel mesh 5 to make the protective gas sprayed from the air intake pipe 3 evenly distributed, thereby improving the welding quality.

Claims

1. A titanium alloy pipeline girth welding protection device, characterized in that It comprises a welding protection cover (1) placed above a titanium alloy pipeline weld (100), a welding gun head connecting rod (2) being arranged on the welding protection cover (1), and an air inlet pipe (3) for introducing protective gas being arranged on the top of the welding protection cover (1).

2. A titanium alloy pipeline girth welding protection device according to claim 1, characterized in that: The welding protection cover (1) is cylindrical, and the bottom of the welding protection cover (1) is provided with an arc-shaped fitting surface (4) that matches the titanium alloy pipe.

3. A titanium alloy pipeline girth welding protection device according to claim 2, characterized in that: A multi-layer stainless steel mesh (5) is arranged on the inner top surface of the welding protection cover (1), and the outlet end of the air intake pipe (3) is located above the stainless steel mesh (5).

4. A titanium alloy pipeline girth welding protection device according to claim 3, characterized in that: The multi-layer stainless steel mesh (5) is fixed in the welding protection cover (1) via an annular pressing ring (6).

5. A titanium alloy pipeline girth welding protection device according to claim 4, characterized in that: After the stainless steel mesh (5) is inserted, the annular pressing ring (6) is pressed onto the stainless steel mesh (5), and the annular pressing ring (6) is welded to the inner wall of the welding protection cover (1) by spot welding.

6. A titanium alloy pipeline girth welding protection device according to claim 4, characterized in that: The annular pressing ring (6) is a spring sheet, which is inserted into the welding protection cover (1) to prevent it from falling due to tension.

7. The titanium alloy pipeline girth welding protection device according to claim 1 is characterized in that: An arc-shaped groove is formed on the outer wall of the welding protection cover (1), a rubber protection sleeve (7) is arranged in the arc-shaped groove, and the welding gun head connecting rod (2) is detachably installed in the rubber protection sleeve (7).

8. A titanium alloy pipeline girth welding protection device according to claim 7, characterized in that: An internal thread is arranged inside the rubber protective sleeve (7), an external thread is arranged on the outer wall of the welding gun head connecting rod (2), and the welding gun head connecting rod (2) is threadedly installed inside the rubber protective sleeve (7).

9. The titanium alloy pipeline girth welding protection device according to claim 1 is characterized in that: The air intake duct (3) is welded at the top center of the welding protection cover (1).

10. A titanium alloy pipeline girth welding protection device according to claim 2, characterized in that: A high temperature resistant silicone sealing ring is arranged on the arc-shaped fitting surface (4).

Images