CN215469048U

CN215469048U - Gas protection dragging cover device for titanium alloy annular fillet weld

Info

Publication number: CN215469048U
Application number: CN202121231436.3U
Authority: CN
Inventors: 张义福; 曾雄亚伟; 付鑫; 刘逸; 陈林林; 徐良; 朱建谋
Original assignee: Jiujiang University
Current assignee: Jiujiang University
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2022-01-11
Anticipated expiration: 2031-06-03

Abstract

The utility model relates to the technical field of welding gas protection devices, in particular to a gas protection dragging cover device for a titanium alloy annular fillet weld. The safety cover, the safety cover is enclosed by back plate, roof, left side board and right side board, the front and the bottom surface of safety cover open and install the stainless steel screen cloth, the right side board has welded the stainless steel clamp, can be used to welder to insert stainless steel clamp internal fixation, the back plate inner wall department of safety cover is connected with the argon gas conveyer pipe, and the back plate inboard of argon gas conveyer pipe lower extreme department is connected with the gas dispersion screen cloth, the gas dispersion screen cloth is the cyclic annular that the bottom was sealed, and the distribution of annular side wall has even tiny intensive gas pocket, has effectively protected welding seam and mother metal and heat affected area, has improved the quality of welding seam greatly. And the protective drag cover is simple to manufacture, low in cost and convenient to operate, and the production efficiency is improved.

Description

Gas protection dragging cover device for titanium alloy annular fillet weld

Technical Field

The utility model relates to the technical field of welding gas protection devices, in particular to a gas protection dragging cover device for a titanium alloy annular fillet weld.

Background

The titanium alloy has the characteristics of high strength, low density, seawater corrosion resistance and other substances corrosion resistance, high fatigue strength at low temperature, low expansion coefficient, good processability and the like, but the titanium has high melting point and poor thermal conductivity, and can absorb hydrogen, oxygen and nitrogen in the air at the temperature of more than 200 ℃, so that when the titanium alloy is welded, because the temperature of a molten pool is high, but the heat dissipation of the titanium metal is not good, the heat affected zone metal around a welding seam is affected by high temperature for a long time, metal grains grow up, the mechanical properties such as plasticity, toughness and the like of the welding joint and the quality of the welding seam are reduced, and the probability of generating welding seam cracks is increased. Therefore, not only the weld joint is protected by inert gas during welding, but also the heat affected zone and the portion of the base metal region affected by high temperature are protected.

At present, when titanium alloy is welded, a welding protective drag cover is generally adopted for welding. However, currently sold or disclosed protective drag covers are typically of the type used on more regular welded structures, such as: tube-to-tube butt, plate-to-plate corner joint, etc., while few weld protection drag shields are disclosed that can be used for the ring weld configuration of the tube-to-plate corner joint.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model aims to overcome the defects of the prior art, and provides a gas protection dragging cover device for a titanium alloy annular fillet weld, which solves the problem of gas protection of the titanium alloy during welding, avoids the titanium alloy from absorbing hydrogen, oxygen and nitrogen in the air during fillet weld of a tube plate, prevents argon from flowing out of the protection dragging cover after entering the protection dragging cover and passing through a stainless steel screen mesh, and uniformly covers the weld joint and a base metal and a heat affected zone thereof, and greatly improves the quality of the weld joint. And the protective drag cover is simple to manufacture, low in cost and convenient to operate, and the production efficiency is improved.

(II) technical scheme

The technical scheme of the utility model is as follows: the utility model provides a gas protection drags cover device for annular fillet weld of titanium alloy, includes the safety cover, the safety cover is enclosed by back plate, roof, left side board and right side board, the front and the bottom surface of safety cover open and install the stainless steel screen cloth, the right side board has welded the stainless steel clamp, can be used to welder insert stainless steel clamp internal fixation, the back plate inner wall department of safety cover is connected with the argon gas conveyer pipe, and the back plate inboard of argon gas conveyer pipe lower extreme department is connected with gaseous dispersion screen cloth, gaseous dispersion screen cloth is the cyclic annular that the bottom sealed, and annular side wall distributes has even tiny dense gas pocket.

As a further improvement of the technical scheme of the utility model, the protective cover is in an irregular trapezoid table shape, the rear plate is formed by cutting a 120-degree pipe wall of a stainless steel pipe with the same diameter as a welded workpiece and then cutting, the radian of one side of the top plate is the same as that of the welded workpiece, the radian of the other side of the top plate is the same as that of a cut of the rear plate, the shape and the size of the left side plate and the right side plate are the same and are in a right trapezoid shape, the right angle of the bottom edge of the left side plate is cut off, and a fan-shaped notch is cut for passing through a welding line.

As a further improvement of the technical scheme of the utility model, the overall shape of the stainless steel screen is different from that of the back plate except for the upper and lower cuts and the length, and the radian and the width are the same as those of the back plate; the stainless steel screen forms an included angle of 45 degrees with the bottom surface.

As a further improvement of the technical scheme of the utility model, the stainless steel screen comprises one layer, the aperture is 1.5mm, the pitch is 1mm, and the thickness is 0.5 mm.

As a further improvement of the technical scheme of the utility model, the stainless steel hoop is circular, and the circle center and the welding line form an included angle of 45 degrees and is used for inserting and fixing the welding gun.

As a further improvement of the technical scheme of the utility model, the left side plate is parallel to the right side plate, the left side plate and the right side plate are both vertical to the top plate, and the rear plate and the bottom surface form an included angle of 60 degrees.

As a further improvement of the technical scheme of the utility model, the rear plate, the top plate, the left side plate, the right side plate, the stainless steel screen, the stainless steel hoop, the argon conveying pipe and the gas dispersion screen are connected together in a welding mode.

(III) advantageous effects

The utility model has the advantages that: during the use, the protection drags the incision and the bottom surface of the cover body of cover and can closely laminate with the work piece surface of being welded, and the parcel nature is good, the position can not take place the skew when welding is followed the welder motion, TIG welder inserts from the stainless steel clamp of safety cover side, then let in argon gas from the argon gas conveyer pipe, argon gas gets into gas dispersion screen cloth through the argon gas conveyer pipe, evenly send into in the safety cover argon gas by gas dispersion screen cloth, be full of the argon gas back in the cover, the air vent through stainless steel screen cloth spouts to the welding seam, make the air around the welding seam blow away by the argon gas, the welding seam is wrapped up around and around to the argon gas evenly, avoid the welding seam to react with the air when the welding, and simultaneously, constantly let in the welding process, make preceding contaminated argon gas because of welding is displaced, play continuous protection effect to the welding seam.

The utility model effectively solves the problem that the welding line and the surrounding area are oxidized by hydrogen, oxygen and nitrogen in the air when the fillet welding girth welding of the titanium alloy tube plate is carried out, the protective gas field formed at the welding line by the protective dragging cover effectively protects the welding line, and the protective dragging cover has the advantages of simple manufacture, low cost and convenient operation, and greatly improves the welding quality and the production efficiency of the titanium alloy.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of another embodiment of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is an isometric view of a gas dispersion screen of the present invention;

FIG. 5 is a schematic view of the present invention as applied to welding;

FIG. 6 is a top view of FIG. 4 of the present invention.

Reference numerals: 1. protective cover: 2. welding gun: 3. stainless steel screen mesh: 4. stainless steel hoop: 5. argon conveying pipe: 6. gas dispersion screen: 7. a rear plate: 8. top plate: 9. left side board: 10. and a right side plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Embodiment 1, please refer to fig. 1-5, a gas shield dragging cover device for titanium alloy annular fillet weld, which comprises a protection cover 1, wherein the protection cover 1 is enclosed by a back plate 7, a top plate 8, a left side plate 9 and a right side plate 10, the front and bottom surfaces of the protection cover 1 are open and provided with a stainless steel screen 3, and a stainless steel hoop 4 is welded on the right side plate 10: the welding gun 2 is inserted and fixed into the stainless steel hoop 4, the lower end of the argon conveying pipe 5 is just inserted into the inner wall of the rear plate 7 of the protective cover 1, the inner side of the rear plate at the lower end of the argon conveying pipe 5 is provided with the gas dispersion screen 6, the gas dispersion screen 6 is cylindrical, the lower end of the gas dispersion screen is closed, and the cylindrical surface is provided with uniform, fine and dense air holes; the cover body of the protective cover 1 is in an irregular trapezoid table shape, the rear plate 7 is formed by cutting a pipe wall of 120 degrees out of a stainless steel pipe with the same diameter as a welded workpiece and then cutting the pipe wall, the radian of one side of the top plate 8 is the same as that of the welded workpiece, the radian of the other side of the top plate is the same as that of a notch of the rear plate 7, the shape and the size of the left side plate 9 and the size of the right side plate 10 are the same, the left side plate is in a right trapezoid shape, the right angle of the bottom edge of the left side plate is cut off, and a fan-shaped notch is cut out to be used for passing through a welding line.

Preferably, the stainless steel mesh 3 has the same overall shape as the rear plate 7 except for the upper and lower slits and the length, and the same curvature and width as the rear plate 7.

Preferably, the left side plate 9 is parallel to the right side plate 10, the left side plate 9 and the right side plate 10 are perpendicular to the top plate, the rear plate 7 forms an included angle of 60 degrees with the bottom surface, and the stainless steel screen 3 forms an included angle of 45 degrees with the bottom surface.

Preferably, a circular stainless steel hoop 4 is additionally arranged on a side plate of the protective cover 1, and the circle center of the circular stainless steel hoop and the welding line form an included angle of 45 degrees and is used for inserting and fixing the welding gun 2.

Preferably, the number of the layers of the stainless steel screen 3 is one, the aperture of the stainless steel screen 3 is 1.5mm, the pitch of the holes is 1mm, and the thickness is 0.5 mm.

Preferably, the rear plate 7, the top plate 8, the left side plate 9, the right side plate 10, the stainless steel screen 3, the stainless steel hoop 4, the argon gas delivery pipe 5 and the gas dispersion screen 6 are connected together by welding.

When the titanium alloy is welded, the notch and the bottom surface of the protective drag cover body can be tightly attached to the surface of the workpiece to be welded, and the wrapping performance is good, the position can not deviate when the welding follows the movement of the welding gun 2, the TIG welding gun 2 is inserted from the stainless steel hoop 4 at the side edge of the protective cover 1, then argon is introduced from an argon conveying pipe 5, the argon enters a gas dispersing screen 6 through the argon conveying pipe 5, the argon is uniformly conveyed into the protective cover 1 through the gas dispersing screen 6, after the cover is filled with argon, the argon is sprayed to the welding line through the vent holes of the stainless steel screen 3, so that the air around the welding line is blown away by the argon, the welding line and the periphery thereof are uniformly wrapped by the argon, the welding line is prevented from reacting with the air during welding, meanwhile, argon is continuously introduced in the welding process, so that polluted argon in the front due to welding is replaced, and a continuous protection effect is achieved on a welding seam.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cover device is dragged in gas protection for titanium alloy annular fillet weld, a serial communication port, including safety cover (1), safety cover (1) is enclosed by back plate (7), roof (8), left side board (9) and right side board (10), the front and the bottom surface of safety cover (1) are opened and are installed stainless steel screen cloth (3), stainless steel clamp (4) have been welded in right side board (10), can be used to welder (2) and insert stainless steel clamp (4) internal fixation, back plate (7) inner wall department of safety cover (1) is connected with argon gas conveyer pipe (5), and back plate (7) inboard of argon gas conveyer pipe (5) lower extreme is connected with gas dispersion screen cloth (6), gas dispersion screen cloth (6) are the cyclic annular that the bottom was sealed, and the annular lateral wall distributes and has the gas pocket of even tiny denseness.

2. The gas-shielded drag cover apparatus for a titanium alloy circumferential fillet weld of claim 1, wherein: the rear plate (7) is formed by cutting a 120-degree pipe wall of a stainless steel pipe with the same diameter as a welded workpiece and then cutting, the radian of one side of the top plate (8) is the same as that of the welded workpiece, the radian of the other side of the top plate is the same as that of a cut of the rear plate (7), the shape and the size of the left side plate (9) and the right side plate (10) are the same, the left side plate and the right side plate are right-angled trapezoids, a right angle of the bottom side is cut off, and a fan-shaped notch is cut out to be used for passing through a welding seam.

3. The gas-shielded drag cover apparatus for a titanium alloy circumferential fillet weld of claim 1, wherein: the radian and the width of the stainless steel screen (3) are the same as those of the back plate (7); the stainless steel screen (3) forms an included angle of 45 degrees with the bottom surface.

4. The gas-shielded drag cover apparatus for a titanium alloy circumferential fillet weld of claim 1, wherein: the stainless steel screen (3) has one layer, the aperture is 1.5mm, the pitch is 1mm, and the thickness is 0.5 mm.

5. The gas-shielded drag cover apparatus for a titanium alloy circumferential fillet weld of claim 1, wherein: the stainless steel hoop (4) is circular, and the circle center and the welding line form an included angle of 45 degrees.

6. The gas-shielded drag cover apparatus for a titanium alloy circumferential fillet weld of claim 1, wherein: the left side plate (9) is parallel to the right side plate (10), the left side plate (9) and the right side plate (10) are both vertical to the top plate (8), and an included angle of 60 degrees is formed between the rear plate (7) and the bottom surface.

7. The gas-shielded drag cover apparatus for a titanium alloy circumferential fillet weld of claim 1, wherein: the gas distribution device comprises a rear plate (7), a top plate (8), a left side plate (9), a right side plate (10), a stainless steel screen (3), a stainless steel hoop (4), an argon conveying pipe (5) and a gas dispersion screen (6) which are connected together in a welding mode.