Titanium alloy pressure vessel welding seam protection device

Abstract

The utility model provides a titanium alloy pressure vessel welding seam protection device, which belongs to the technical field of welding instruments, and comprises a titanium pressure vessel cylinder, a rear protection dragging cover is arranged at the bottom of the inner wall of the titanium pressure vessel cylinder, a connecting plate is arranged on one side of the rear protection dragging cover, a welding gun is arranged at the end part of the connecting plate, and the welding gun is connected with the titanium pressure vessel cylinder. A nozzle is arranged at the end of the welding gun, and a tungsten electrode is arranged at the end of the nozzle. A titanium pressure vessel barrel is arranged, protective gas enters a welding gun through a front protective gas inlet pipe, a tungsten electrode makes contact with the titanium pressure vessel barrel for arc striking, a molten pool is formed, titanium welding wires are filled, meanwhile, the protective gas flows out of a nozzle, a protective layer is formed for the molten pool, the molten pool and a welding seam are isolated from air, and a high-temperature area of the welding seam can be effectively protected; the lower portion of the rear gas inlet pipe is filled with the steel wire balls, so that protective gas more evenly covers a welding seam, comprehensive protection is formed for the welding seam, the welding seam is effectively prevented from being oxidized to become blue and purple and deteriorated when the titanium pressure container is welded, and the filler can be repeatedly used.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding instrument technical field, concretely is a titanium alloy pressure vessel weld protection device. BACKGROUND

[0002] Titanium is a kind of active metal, can generate compact oxide film with oxygen at normal temperature and keep high stability and corrosion resistance, is successfully applied in chemical equipment aspect, titanium and titanium alloy should be assembled and welded in clean environment without pollution, dust and iron ion, the weld and heat-affected zone above 400 DEG C should be strictly protected, prevent oxidation, the color of weld and near seam area is the sign of protection effect, silver-white, light yellow indicates that protection effect is good, deep yellow is slight oxidation, gold purple is generally indicated moderate oxidation, dark blue indicates serious oxidation, indicates that weld has been deteriorated, must be scrapped and re-welded.

[0003] In actual production operation process, molten pool, weld and air exist the possibility of contact, product has the possibility of oxidation, inert gas argon consumption saving effort is not ideal, influence manufacturing cost, to effectively guarantee the weld quality of titanium and titanium alloy pressure vessel, reduce the generation of scrap product, energy saving and cost reduction, it is necessary to design a titanium and titanium alloy pressure vessel weld protection device. UTILITY MODEL CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides a titanium alloy pressure vessel weld protection device which overcomes the above technical problems or at least partially solves the above problems.

[0005] The utility model is realized as follows:

[0006] The utility model provides a titanium alloy pressure vessel weld protection device, including titanium pressure vessel cylinder, the bottom of titanium pressure vessel cylinder inner wall is equipped with rear protection drag cover, one side of rear protection drag cover is equipped with connecting plate, the end of connecting plate is equipped with welding torch, the end of welding torch is equipped with nozzle, the end of nozzle is equipped with tungsten electrode.

[0007] In an embodiment of the utility model, the side of rear protection drag cover is equipped with front protection gas inlet pipe.

[0008] In an embodiment of the utility model, the bottom of titanium pressure vessel cylinder inner wall is equipped with titanium welding wire located just below nozzle.

[0009] In an embodiment of the utility model, rear protection drag cover includes drag cover body, rear inlet pipe and stainless steel wire ball, the size of drag cover body is 30x80x50mm.

[0010] In an embodiment of the utility model, the rear air inlet pipe is evenly provided with air outlet holes with a diameter of 1.5 mm inside the drag cover body.

[0011] In an embodiment of the utility model, the stainless steel wire ball is filled below the rear air inlet pipe.

[0012] The titanium alloy pressure vessel weld joint protection device provided by the utility model has the beneficial effects of:

[0013] 1. By setting the titanium pressure vessel cylinder, the protection gas enters the welding gun from the front protection gas inlet pipe, the tungsten electrode contacts the titanium pressure vessel cylinder to generate an arc, a molten pool is formed, titanium welding wire is filled, the protection gas flows out from the nozzle to form a protection layer for the molten pool, the molten pool and the weld joint are isolated from air, the weld joint high-temperature area can be effectively protected, oxidation is prevented, the product corrosion resistance is improved, the consumption of inert gas argon can be greatly saved, and the manufacturing cost is reduced.

[0014] 2. By setting the stainless steel wire ball, the wire ball is filled below the rear air inlet pipe, the protection gas is more evenly covered on the weld joint, the weld joint is comprehensively protected, oxidation of the weld joint during welding of the titanium pressure vessel is prevented, the weld joint is prevented from turning blue and purple, the weld joint is prevented from being deteriorated, the filled material can be repeatedly used, the manufacturing cost is low, waste materials and excess materials can be used for manufacturing, the generation of scrapped products is reduced, the first-time product qualification rate is improved, and the weld joint repair and nondestructive testing costs are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the basis of these drawings.

[0016] Fig. 1 It is the structural schematic diagram provided by the embodiments of the utility model;

[0017] Fig. 2 It is the structural schematic diagram provided by the embodiments of the utility model;

[0018] Fig. 3 It is the top view of the drag cover body provided by the embodiments of the utility model.

[0019] In the drawing: 1, titanium pressure vessel cylinder;2, front protection gas inlet pipe;3, welding gun;4, nozzle;5, tungsten electrode;6, titanium welding wire;7, connecting plate;8, rear protection drag cover;9, stainless steel wire ball;10, rear air inlet pipe;11, air outlet hole;12, drag cover body. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment. Obviously, the described embodiment is part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] Embodiment

[0022] With reference to Figs. 1-3 The technical scheme provides a titanium alloy pressure container weld joint protection device, which comprises a titanium pressure container cylinder body 1, a rear protection drag cover 8 is arranged on the bottom of the inner wall of the titanium pressure container cylinder body 1, a connecting plate 7 is arranged on one side of the rear protection drag cover 8, a welding gun 3 is arranged at the end of the connecting plate 7, a nozzle 4 is arranged at the end of the welding gun 3, a tungsten electrode 5 is arranged at the end of the nozzle 4, when welding operation is carried out in the titanium pressure container cylinder body 1, protective gas is conveyed to the welding gun 3 through the front protective gas inlet pipe 2, then the tungsten electrode 5 is in contact with the titanium pressure container cylinder body 1 to generate an electric arc, and then a molten pool is formed, at this time, titanium welding wire 6 starts to fill, at the same time, the protective gas is sprayed out from the nozzle 4 to build a protective layer around the molten pool, successfully isolating the molten pool from the weld joint and air, the welding gun 3 is connected with the rear protection drag cover 8 through the connecting plate 7, inert protective gas is input through the rear inlet pipe 10 to create a protective closed space for the formed weld joint and heat affected zone with a temperature of 400 DEG C and above, so as to reduce the consumption of the protective gas, the rear protection drag cover 8 is composed of a drag cover body 12, the rear inlet pipe 10 and stainless steel wire balls 9, the rear inlet pipe 10 is uniformly distributed with gas outlet holes 11 with a diameter of 1.5 mm in the drag cover body 12, and the stainless steel wire balls 9 are filled below the rear inlet pipe 10, which aims to make the protective gas more uniformly cover the weld joint to achieve a comprehensive protection effect on the weld joint, effectively avoiding the phenomenon that the weld joint is oxidized, blue and purple during the welding process of the titanium pressure container, preventing the weld joint from being deteriorated, by arranging the titanium pressure container cylinder body 1, the protective gas enters the welding gun 3 through the front protective gas inlet pipe 2, the tungsten electrode 5 is in contact with the titanium pressure container cylinder body 1 to generate an arc, a molten pool is formed, titanium welding wire 6 is filled, at the same time, the protective gas flows out from the nozzle 4 to form a protective layer for the molten pool, and the molten pool and the weld joint are isolated from air, which can effectively protect the high temperature area of the weld joint, prevent oxidation, improve the corrosion resistance of the product, greatly save the consumption of inert gas argon, and reduce the manufacturing cost.

[0023] With reference to Figs. 1-3, based on the same idea as the above embodiment 1, this embodiment also proposes that the side of the rear protective drag cover 8 is provided with a front protective gas inlet pipe 2, the protective gas enters the welding gun 3 from the front protective gas inlet pipe 2, the tungsten electrode 5 contacts the titanium pressure container cylinder 1 to arc, forms a molten pool, fills the titanium welding wire 6, and at the same time the protective gas flows out from the nozzle 4, forms a protective layer for the molten pool, and isolates the molten pool and the weld from the air, which can effectively protect the high temperature area of the weld, prevent oxidation, improve the corrosion resistance of the product, and greatly save the consumption of inert gas argon.

[0024] Referring to Figs. 1-3 , based on the same idea as the above embodiment 1, this embodiment also proposes that the bottom of the inner wall of the titanium pressure container cylinder 1 is provided with a titanium welding wire 6 located directly below the nozzle 4.

[0025] Referring to Figs. 1-3 , based on the same idea as the above embodiment 1, this embodiment also proposes that the rear protective drag cover 8 includes a drag cover body 12, a rear inlet pipe 10, and a stainless steel wire ball 9, and the size of the drag cover body 12 is 30x80x50mm.

[0026] Referring to Figs. 1-3 , based on the same idea as the above embodiment 1, this embodiment also proposes that the rear inlet pipe 10 is uniformly provided with a gas outlet hole 11 with a diameter of 1.5mm inside the drag cover body 12, and the rear inlet pipe 10 is uniformly distributed with gas outlet holes 11 with a diameter of 1.5mm inside the drag cover body 12, and the lower part of the rear inlet pipe 10 is filled with a stainless steel wire ball 9, which aims to make the protective gas more evenly cover the weld, and achieve the effect of all-round protection of the weld.

[0027] Referring to Figs. 1-3 , based on the same idea as the above embodiment 1, this embodiment also proposes that the stainless steel wire ball 9 is filled below the rear inlet pipe 10. By setting the stainless steel wire ball 9, the steel wire ball is filled below the rear inlet pipe 10, which makes the protective gas more evenly cover the weld, forms a comprehensive protection for the weld, effectively prevents the weld of the titanium pressure container cylinder 1 from oxidizing blue and purple during welding, causes the weld to deteriorate, and the filled material can be reused, the manufacturing cost is low, the waste and excess materials can be used for manufacturing, the production of scrapped products can be reduced, the first pass rate of the product can be improved, and the cost of weld repair and non-destructive testing can be reduced.

[0028] Specifically, the working process or working principle of the titanium alloy pressure vessel weld protection device is as follows: when welding is performed in the titanium pressure vessel cylinder 1, the protective gas is delivered to the welding gun 3 through the front protective gas inlet pipe 2, the tungsten electrode 5 is in contact with the titanium pressure vessel cylinder 1 to initiate an electric arc, and then a molten pool is formed, at this time the titanium welding wire 6 starts to fill, at the same time, the protective gas is sprayed from the nozzle 4 to build a protective layer around the molten pool, successfully isolating the molten pool from the weld and air, the welding gun 3 is connected to the rear protective drag cover 8 by means of the connecting plate 7, the inert protective gas is input through the rear inlet pipe 10 to create a protective closed space for the formed weld and heat-affected zone with a temperature of 400 DEG C and above, which can reduce the consumption of protective gas, the rear protective drag cover 8 is composed of a drag cover body 12, a rear inlet pipe 10 and stainless steel wire balls 9, the rear inlet pipe 10 is uniformly distributed with gas outlet holes 11 with a diameter of 1.5 mm in the drag cover body 12, and the stainless steel wire balls 9 are filled below the rear inlet pipe 10, the purpose of which is to enable the protective gas to more uniformly cover the weld, achieving a full-coverage protection effect on the weld, effectively avoiding the phenomenon of oxidation, blue and purple of the weld during the welding process of the titanium pressure vessel, and preventing the weld from being deteriorated.

[0029] It should be noted that the welding gun 3 is a device or equipment existing in the prior art, or a device or equipment that can be realized in the prior art, the power supply, specific components and principles thereof are clear to those skilled in the art, and therefore will not be described in detail.

Claims

1. A titanium alloy pressure vessel weld protection device comprising a titanium pressure vessel shell (1) characterised in that, The bottom of the inner wall of the titanium pressure container cylinder (1) is provided with a rear protective drag cover (8), one side of the rear protective drag cover (8) is provided with a connecting plate (7), the end of the connecting plate (7) is provided with a welding gun (3), the end of the welding gun (3) is provided with a nozzle (4), and the end of the nozzle (4) is provided with a tungsten electrode (5). The side of the rear protective drag cover (8) is provided with a front protective gas inlet pipe (2). The rear protective drag cover (8) comprises a drag cover body (12), a rear inlet pipe (10) and a stainless steel wire ball (9), and the size of the drag cover body (12) is 30*80*50mm. The rear inlet pipe (10) is uniformly provided with a gas outlet hole (11) with a diameter of 1.5mm inside the drag cover body (12). The stainless steel wire ball (9) is filled below the rear inlet pipe (10).

2. A titanium alloy pressure vessel weld protection device according to claim 1, wherein, The bottom of the inner wall of the titanium pressure container cylinder (1) is provided with a titanium welding wire (6) located directly below the nozzle (4).

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