Inflation protection device for metal pipe welding

Abstract

The utility model discloses an inflation protection device for welding a metal pipe material, which does not need to be filled with inert gas in advance, can ensure that a welded seam is smooth and flat, and can save gas and improve welding efficiency. The device comprises a main body, an arc groove matched with a pipe material is formed below the main body, and a gas storage groove is formed in the middle of the top face of the arc groove and corresponds to a pipe material gap; the main body is also provided with an inflation channel communicated with the air storage tank; during use, gas flows to the gas storage groove and the arc groove through the inflation channel, and the welding gun is arranged at one end of the gas storage groove to weld a pipe gap.

Description

Technical Field

[0001] The utility model belongs to a welding anti-oxidation protection tool, in particular to an inflatable protection device used for welding of metal pipe materials. Background Art

[0002] The raw materials for the production of thermos bottles are generally metal tubes such as stainless steel or titanium. After the metal sheets are processed and rolled, the axial gaps are welded to form metal tubes, which requires inert gas (such as argon) for protection to prevent the molten metal from being oxidized by high temperature and causing welding defects.

[0003] Referring to the traditional welding method of stainless steel pipes, it generally uses plastic or other material covers to seal the two ends of the stainless steel pipe, and then fills the stainless steel pipe with argon gas for gas replacement. When the air in the stainless steel pipe is completely replaced with argon gas, welding is performed. The disadvantages of this gas-filled welding method are: large argon consumption and long filling time (the pipe material used for the thermos cup is generally 2.7m long and 50mm in diameter), which seriously affects the welding efficiency and wastes argon gas. Summary of the invention

[0004] The utility model aims to provide a gas-filled protective device for metal pipe welding, which does not need to be filled with inert gas in advance, can ensure that the weld seam after welding is smooth and flat, can save gas and improve welding efficiency.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions.

[0006] A gas-filled protective device for metal pipe welding comprises a main body, a circular arc groove matched with the pipe material is arranged below the main body, a gas storage groove is arranged in the middle of the top surface of the circular arc groove corresponding to the pipe material gap; a gas-filled channel connected with the gas storage groove is also arranged on the main body; when in use, gas flows to the gas storage groove and the circular arc groove through the gas-filled channel, and a welding gun is arranged at one end of the gas storage groove to weld the pipe material gap.

[0007] Preferably, one end of the gas storage tank is open and the other end is closed, and the welding gun is arranged at the open end of the gas storage tank.

[0008] Preferably, a welding opening groove is provided on the main body at the open end of the gas storage tank, which runs through the main body from top to bottom and is the same as the gas storage tank, and the welding gun is provided in the welding opening groove.

[0009] Preferably, the inflation channel comprises an air inlet channel and an air outlet channel, and a bending buffer portion is provided between the air inlet channel and the air outlet channel.

[0010] Preferably, the air inlet channel is arranged horizontally, and the air outlet channel is arranged vertically.

[0011] Compared with the prior art, the utility model has the following beneficial effects: by adopting the above technical scheme, by setting the circular arc groove to match the pipe material, it can be closer to the pipe material, convenient to move back and forth with the pipe material in the axial direction, and convenient to weld the axial gap of the pipe material; at the same time, a gas storage tank is set in the middle of the top surface of the circular arc groove corresponding to the gap of the pipe material, and is connected to the gas storage tank by setting an inflation channel, the gas storage tank can be used as a temporary storage place for inert gas, and flows to the open end of the gas storage tank to dissipate outward to cover the welding place of the gap of the protection welding gun, and the gas storage tank also serves as a buffer space for inert gas inflation, avoiding excessive inflation pressure or flow rate, blowing away the molten metal liquid of welding and causing poor welding; through the above structural setting, there is no need to fill the pipe material with inert gas in advance, so as to protect the welding place smooth and flat, and it can be inflated as needed, saving gas and improving welding efficiency.

[0012] A further beneficial effect is that one end of the gas storage tank is open and the other end is closed to prevent gas from escaping from the other end and wasting gas. This can also facilitate the control of the gas flow rate and pressure to improve the quality of welding; and a welding port groove is provided at the open end of the gas storage tank to accommodate the head of the welding gun. Since the welding port groove is covered on both sides, the inert gas therein is more concentrated, which provides better protection during welding.

[0013] A further beneficial effect is that the inflation channel is provided with an air inlet channel and an air outlet channel, and a bending buffer portion is provided between the air inlet channel and the air outlet channel. For example, the air inlet channel is provided horizontally and the air outlet channel is provided vertically, so that the flow rate of the inert gas can be slowed down when it is inflated, thereby avoiding a rapid flow rate blowing toward the welding point, and providing better protection during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model when used for welding.

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0016] Figure 3 It is a schematic diagram of the structure of the utility model when viewed from above. DETAILED DESCRIPTION

[0017] In order to make the technical solution of the utility model clearer, the following Figures 1 to 3 It should be understood that the specific implementation methods described in this specification are only for explaining the utility model, and are not intended to limit the protection scope of the utility model.

[0018] The utility model is an inflatable protective device for metal pipe welding, comprising a main body 1, which can be made of metal materials such as 45 steel, and a circular arc groove 2 adapted to the pipe material A is arranged below the main body 1, so that it is closer to the pipe material A and moves back and forth with the pipe material A in the axial direction, so as to facilitate welding of the axial pipe material gap A-1 of the pipe material A; a gas storage groove 3 is arranged in the middle of the top surface of the circular arc groove 2 corresponding to the pipe material gap A-1; a gas charging channel 4 connected to the gas storage groove 3 is also arranged on the main body 1; the gas storage groove 3 can be used as a temporary storage place for inert gas, and the gas flows to the opening of the gas storage groove 3 The inert gas is dissipated outward from the end to cover the welding point of the protection welding gun B to the pipe gap A-1, and the gas storage tank 3 also serves as a buffer space for inflation of the inert gas to avoid excessive inflation pressure or flow rate, which will blow away the molten metal liquid and cause poor welding. Through the above-mentioned structural arrangement, there is no need to fill the pipe A with inert gas in advance, so as to protect the welding point from being smooth and flat, and it can be filled as needed, saving gas and improving welding efficiency. When in use, the gas flows to the gas storage tank 3 and the arc groove 2 through the inflation channel 4, and the welding gun B is arranged at one end of the gas storage tank 3 to weld the pipe gap A-1.

[0019] In order to avoid gas escaping from the other end and wasting gas, and also to facilitate controlling the flow rate and pressure of the gas to improve the quality of welding; the gas storage tank 3 is set to be open at one end and closed at the other end, and the welding gun B is set at the open end of the gas storage tank 3.

[0020] In order to make the inert gas more concentrated at the welding point, a welding opening groove 5 which runs through from top to bottom and is the same as the gas storage tank 3 is provided on the main body 1 at the open end of the gas storage tank 3 for accommodating the head of the welding gun B.

[0021] Furthermore, the inflation channel 4 includes an air inlet channel 41 and an air outlet channel 42, and a bending buffer portion 43 is provided between the air inlet channel 41 and the air outlet channel 42; the preferred scheme of this embodiment is that the air inlet channel 41 is horizontally arranged, the air outlet channel 42 is vertically arranged, and the bending buffer portion 43 is the bending portion of the air inlet channel 41 and the air outlet channel 42; in this way, the flow rate of the inert gas can be slowed down when it is inflated, thereby avoiding a faster flow rate blowing toward the welding point, and having a better protective effect during welding.

Claims

1. An inflatable protective device for metal pipe welding, characterized in that: The invention comprises a main body (1), wherein a circular arc groove (2) adapted to the pipe material (A) is provided below the main body (1), and an air storage groove (3) is provided in the middle of the top surface of the circular arc groove (2) corresponding to the pipe material gap (A-1); and an air charging channel (4) communicating with the air storage groove (3) is also provided on the main body (1); When in use, the gas flows through the gas charging channel (4) to the gas storage tank (3) and the arc groove (2), and the welding gun (B) is arranged at one end of the gas storage tank (3) to weld the pipe material gap (A-1).

2. The inflatable protective device for metal pipe welding according to claim 1, characterized in that: The gas storage tank (3) has an open end and a closed end. The welding gun (B) is arranged at the open end of the gas storage tank (3).

3. The inflatable protection device for metal pipe welding according to claim 2, characterized in that: Located at the open end of the gas storage tank (3), the main body (1) is provided with a welding opening groove (5) which is through-through and identical to the gas storage tank (3), and the welding gun (B) is arranged at the welding opening groove (5).

4. An inflatable protective device for metal pipe welding according to any one of claims 1 to 3, characterized in that: The inflation channel (4) comprises an air inlet channel (41) and an air outlet channel (42), and a bent buffer portion (43) is provided between the air inlet channel (41) and the air outlet channel (42).

5. The inflatable protection device for metal pipe welding according to claim 4, characterized in that: The air inlet channel (41) is arranged horizontally, and the air outlet channel (42) is arranged vertically.

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