Titanium-steel composite plate welding inert gas protection device

Abstract

The utility model provides a titanium-steel composite plate welding inert gas protection device, and belongs to the technical field of engineering construction. The titanium-steel composite plate welding inert gas protection device comprises an inert gas protection pipe and a signal leakage detection hole welded in a base layer carbon steel plate welding seam, the inert gas protection pipe comprises an open end and a closed end, the open end is used for being placed on a coating titanium plate welding seam, a welding opening is formed in the open end, and the signal leakage detection hole is connected with the signal leakage detection hole. And a gas injection pipeline extending into the inert gas protection pipe is mounted at the closed end. According to the utility model, the welding pools on the front and back surfaces of the coating titanium plate of the titanium-steel composite plate are slowly cooled under the protection of inert gas, so that the welding quality of the coating titanium plate is improved, and the service life of the titanium-steel composite plate is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering construction technical field, concretely relates to a titanium-steel composite board welding inert gas protection device. BACKGROUND

[0002] In recent years, with the continuous expansion of production scale of chemical industry, metallurgy and other industries, the demand for acid, alkali and salt solution also increases, and its storage and reaction are particularly important. Titanium-steel composite board emerges as the times require as a new type of composite board material. Compared with traditional stainless steel-steel composite board material, titanium-steel composite board material is bonded together by explosion under high temperature and high pressure, which improves the corrosion resistance of the composite board material and greatly saves the economic cost of expensive titanium cladding plate. It is a new type of composite board material and is widely used in petroleum, chemical engineering construction and the like.

[0003] Due to the particularity of titanium cladding plate material of titanium-steel composite board, the welding characteristics are as follows:

[0004] 1. Titanium-steel composite board material welding is divided into two parts, namely base carbon steel plate material welding and cladding titanium plate material welding, without transition layer welding.

[0005] 2. Titanium-steel composite board material cladding titanium plate welding joint adopts titanium backing plate / titanium cover plate combination. Argon arc welding is used for cladding titanium plate welding, and the weld pool must be cooled under inert gas protection state to avoid titanium weld oxidation phase change, ensure welding quality, and the welding quality and utilization degree can be judged according to the color of the weld and the welding area after the completion of the cladding titanium plate weld welding.

[0006] 3. The inert gas used for titanium-steel composite board cladding titanium plate welding is selected to be not less than 99.99% argon, and liquid argon is optimal.

[0007] According to the above welding characteristics of titanium-steel composite board, combined with the construction site operation environment, tool construction situation and economic effect, in order to ensure that the inside and outside of the weld on both sides of the titanium layer titanium cover plate (titanium backing plate welding form is segment welding, and all welds of titanium cover plate are full welding) are in inert gas protection state, the titanium-steel composite board welding inert gas protection device is provided. UTILITY MODEL CONTENTS

[0008] In order to solve the above technical problems, the utility model provides a titanium-steel composite board welding inert gas protection device.

[0009] The technical scheme of the utility model is realized as follows:

[0010] The utility model provides a titanium -steel composite board welding inert gas protection device, including inert gas protection pipe and the signal leak detection hole of welding in base layer carbon steel plate weld, inert gas protection pipe includes open end and closed end, open end is used to place in cladding titanium plate weld, and open end is equipped with welding interface, install the gas injection pipeline of inlaying in inert gas protection pipe on closed end.

[0011] Further, the inert gas protection pipe is a stainless steel pipe or a copper pipe.

[0012] Further, the inert gas protection pipe is filled with copper mesh corresponding to the open end and the closed end.

[0013] Further, the signal leak detection hole is equipped with a matched external thread connector for connecting an inert gas source pipe.

[0014] Further, the welding interface is preset to adapt to the groove and the arc of the cladding titanium plate weld.

[0015] Further, the gas injection pipeline includes a first part penetrating through the closed end and a second part located in the inert gas protection pipe, and the outlet of the second part is oriented towards the closed end.

[0016] The utility model has the following beneficial effects:

[0017] 1. The titanium-steel composite board welding inert gas protection device provided by the application enables the front and back surfaces of the weld pool to be slowly cooled under inert gas protection during the welding of the cladding titanium plate of the composite board, avoids the oxidation and phase change of the titanium weld, ensures the welding quality, improves the slow cooling of the front and back surfaces of the weld pool of the cladding titanium plate of the titanium-steel composite board under inert gas protection, and further improves the welding quality of the cladding titanium plate, so as to improve the service life of the titanium-steel composite board.

[0018] 2. The titanium-steel composite board welding inert gas protection device provided by the application enables the signal leak detection hole of the base layer carbon steel plate of the composite board to be used to detect the vacuum between the base layer carbon steel plate and the cladding titanium plate after the welding of the cladding titanium plate is completed, so as to detect the welding quality of the cladding titanium plate.

[0019] 3. The manufacturing method of the inert gas protection pipe is simple, can be used repeatedly, and has low manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are included to provide a further understanding of the utility model, form a part of the application and serve to explain the utility model, and do not constitute an improper limitation of the utility model.

[0021] Figure 1 is the front view of the utility model;

[0022] Figure 2 is a side view of the utility model.

[0023] In the figure: 1, inert gas protection pipe; 2, signal leak detection hole; 3, welding port; 4, gas injection pipeline; 5, cladding titanium plate; 6, base layer carbon steel plate; 7, titanium cover plate; 8, titanium backing plate; 9, copper mesh. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] As shown in Figure 1 and Figure 2 A typical embodiment of the utility model provides a kind of titanium-steel composite plate welding inert gas protection device, including inert gas protection pipe 1 and signal leak detection hole 2 welded in base layer carbon steel plate 6 weld, inert gas protection pipe 1 is stainless steel pipe or copper pipe, inert gas protection pipe 1 includes open end and closed end, open end is used to place on cladding titanium plate 5 weld, and open end is provided with welding port 3, and closed end is installed with the gas injection pipeline 4 inserted into inert gas protection pipe 1.

[0026] In the embodiment, after titanium backing plate 8 is fixed, argon is injected through signal leak detection hole 2, the gas composition of weld on both sides of titanium backing plate 8 is analyzed using infrared analyzer, there is no other gas except argon, titanium backing plate 8 weld section is welded and fixed using inert gas protection pipe 1 and high-frequency welding machine welding gun (argon arc welding water-cooled welding gun) cooperation, after welding is completed, the welding quality is determined by the surface color of weld and heat affected zone, after welding quality is qualified, the weld reinforcement of both sides of titanium backing plate 8 is cleaned, after cleaning is completed, titanium cover plate 7 is welded, and the inert gas protection process when titanium backing plate 8 is welded is repeated, to complete titanium backing plate 8 welding process. After cladding titanium plate 5 is completely welded, vacuum test (reference tank bottom vacuum test) of cladding titanium plate 5 is carried out using signal leak detection hole 2, and after detection is qualified, copper plug is used for plugging.

[0027] Specifically in welding construction, a welder cooperates with a general worker, the welder holds argon arc welding water-cooled welding stick to carry out welding operation, the general worker holds inert gas protection pipe 1, welding stick gun nozzle cannot be separated from welding port 3 of inert gas protection pipe 1 all the time, the moving direction of inert gas protection pipe 1 is consistent with welding operation (welding pool is completely in inert gas protection of protection pipe after welding, and cools), and the moving rate of inert gas protection pipe 1 also keeps consistent with welding operation of the welder.

[0028] On this basis, the inert gas protection pipe 1 is filled with copper mesh 9 corresponding to the open end and the closed end. The welding port 3 is preset to adapt to the welding groove and the arc of the titanium cladding plate 5.

[0029] In the manufacturing of the inert gas protection pipe 1, the inert gas protection pipe 1 is selected to be a stainless steel pipe with a chemical property not less than φ108*4.0 (most preferably a copper pipe), the end is sealed by a stainless steel plate, the middle of the sealing plate is connected to the gas injection pipeline 4 (φ10 or so), the copper mesh 9 is filled around the gas injection pipeline 4, the bottom end of the inert gas protection pipe 1 is filled with the copper mesh 9, and the welding port 3 of the inert gas protection pipe 1 is determined according to the welding groove and the arc of the titanium cladding plate 5 of the titanium-steel composite plate.

[0030] The signal leak detection hole 2 is installed with a matched external thread connecting pipe for connecting the inert gas source pipe. Specifically, in the operation process, according to the equipment welding layout, the signal leak detection hole 2 is uniformly welded on the base carbon steel plate 6 of the titanium-steel composite plate, and the base carbon steel plate 6 of the composite plate is welded, the gas path of the signal leak detection hole 2 is detected whether it is smooth, the matched external thread connecting pipe is installed and connected with the argon gas source pipe (the same below, the gas bottle is mostly selected for gas supply on the construction site). After the manufacturing of the inert gas protection pipe 1 is completed, the inert gas protection pipe 1 is connected with the argon gas source pipe, and then the welding operation is carried out.

[0031] The gas injection pipeline 4 includes a first part penetrating the closed end and a second part located in the inert gas protection pipe 1, and the outlet of the second part is in a state of facing the closed end. This kind of setting mode can guarantee that the inert gas protection pipe 1 is filled with enough gas, and at the same time, the amount of gas discharged from the welding port 3 can be reduced.

[0032] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An inert gas protection device for welding titanium-steel composite plates, characterized in that, The utility model relates to a signal leak detection hole for welding in the base layer carbon steel plate weld seam and inert gas protection pipe, the inert gas protection pipe includes open end and closed end, the open end is used to place on the cladding titanium plate weld seam, and the open end is provided with welding interface, and the closed end is equipped with the gas injection pipeline that extends into the inert gas protection pipe.

2. The inert gas protection device for welding a titanium-steel clad plate according to claim 1, wherein The inert gas protection pipe is a stainless steel pipe or a copper pipe.

3. The inert gas protection device for welding a titanium-steel composite plate according to claim 1 or 2, characterized in that, The inert gas protection pipe is filled with copper mesh corresponding to the open end and the closed end.

4. The inert gas protection device for welding a titanium-steel clad plate according to claim 3, wherein The signal leak detection hole is equipped with a matched external thread connector pipe for connecting the inert gas source pipe.

5. The inert gas protection device for welding titanium-steel composite plate according to claim 1 or 4, characterized in that, The welding interface is preset to adapt to the groove and arc of the cladding titanium plate weld seam.

6. The inert gas protection device for welding a titanium-steel clad plate according to claim 5, wherein The gas injection pipeline includes a first part penetrating the closed end and a second part located in the inert gas protection pipe, and the outlet of the second part is towards the closed end.

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