Protective device for external welding of tank body

Abstract

According to the tank body external welding protection device, a welding seam protection mechanism is provided with a gas inlet groove used for applying protection gas to a tank body welding seam, a gas distribution plate perpendicular to the inner walls of baffles on the two sides is arranged in the gas inlet groove in the length direction of the welding seam, and a plurality of gas distribution holes are formed in the gas distribution plate; the gas distribution plate divides the gas inlet groove into an upper gas inlet groove and a lower gas distribution groove opposite to the outer wall of the tank body, the upper gas inlet groove is provided with a gas inlet pipe penetrating into the upper gas inlet groove, the pipe wall of the gas inlet pipe is provided with a plurality of gas inlet holes for feeding protective gas, and the protective gas enters the upper gas distribution groove through the gas distribution holes of the gas distribution plate; and positioning chain plate mechanisms matched and sealed with the tank wall are arranged on the outer walls of the side baffles on the two sides of the air inlet groove. And during welding, the barrel rotates to protect the welded welding seam for a longer time in the internal welding seam protection device by using argon, so that the quality of the welding seam can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing a low-temperature liquid tank container, in particular to a tank body external welding protection device. Background Art

[0002] Nowadays, low-temperature liquid tank containers are used for energy transportation in both the domestic and international markets. Because low-temperature liquid tank containers have a rated mass, in order to transport more media, merchants need to reduce the weight of the tank containers, so the plate thickness used by equipment manufacturers is relatively thin. In order to ensure the welding quality, equipment appearance, weld excess height and other requirements of the equipment, argon arc welding is often used to weld the tank cylinder and other components. The deformation of the argon arc welding equipment body is small, but the argon arc welding method requires argon gas to be filled for welding. During the welding process, defects such as pores and weld surface oxidation are prone to occur. Argon gas needs to be filled during welding to ensure the welding quality of the weld. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a tank body welding protection device which can ensure the quality of the weld seam in view of the deficiencies of the prior art.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions, a tank external welding protection device, which is characterized by:

[0005] An air inlet groove is provided for applying protective gas to the outer weld of the tank body. The air inlet groove includes side baffles arranged in parallel on both sides of the weld width direction. The front and rear ends of the side baffles are respectively provided with a front baffle and a rear baffle for closing the air inlet groove. An upper baffle for closing the air inlet groove is installed on the top of the side baffle;

[0006] A gas distribution plate is provided in the gas inlet groove and is arranged along the length direction of the weld and is perpendicular to the inner walls of the side baffles on both sides. The gas distribution plate is provided with a plurality of gas distribution holes. The gas distribution plate divides the gas inlet groove into an upper gas inlet groove and a lower gas distribution groove arranged opposite to the outer wall of the tank body. The upper gas inlet groove is provided with an inlet pipe penetrating into the upper gas inlet groove. The wall of the inlet pipe is provided with a plurality of inlet holes for introducing protective gas. The protective gas enters the lower gas distribution groove through the gas distribution holes of the gas distribution plate.

[0007] The outer walls of the side baffles on both sides of the air inlet groove are provided with a positioning chain plate mechanism for fitting and sealing with the tank wall.

[0008] The technical problem to be solved by the utility model can also be further achieved through the following technical scheme, the positioning chain plate mechanism is composed of a plurality of chain segments hinged to each other, the first and last chain segments and the middle chain segment are rotatably connected to the side baffles through connecting pins, and the first and last chain segments and the middle chain segment are provided with long strip adjustment holes that cooperate with the connecting pins; the long strip adjustment holes on the first and last chain segments are arranged front and back, and the long strip adjustment holes on the middle chain segment are arranged up and down.

[0009] The technical problem to be solved by the utility model can be further achieved by the following technical solution: a buffer steel wire or asbestos wire is arranged in the upper air inlet groove to buffer and evenly distribute the gas when it enters.

[0010] The technical problem to be solved by the utility model can be further achieved through the following technical solution: a fixed installation position for installing a welding gun is provided at the front baffle of the air inlet groove.

[0011] The technical problem to be solved by the utility model can also be further achieved through the following technical solution: a handle is installed on the upper baffle of the air inlet groove to push the air inlet groove to move along the surface of the cylinder section.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] A connecting plate with a chain-like structure is used. This structure is designed to adapt to equipment with different diameters. The function of the connecting plate is to prevent gas from flowing out of the side plate and to fit closely with the inner diameter of the tank cylinder. During welding, the cylinder rotates and the welded weld is protected for a longer time in the internal weld protection device using argon gas. This can effectively improve the quality of the weld and greatly save the manpower, material and working time costs brought by weld repair. The overall structure of this device is simple to use, and it can realize weld protection after welding of tank cylinders of multiple specifications. The device is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the utility model;

[0015] Figure 2 for Figure 1 A cross-sectional view of

[0016] Figure 3 It is a schematic diagram of the structure when viewed from above;

[0017] Figure 4 This is a top view. DETAILED DESCRIPTION

[0018] The specific technical solutions of the present invention are further described below to facilitate further understanding of the present invention by those skilled in the art, but do not constitute a limitation on the rights thereof.

[0019] A tank external welding protection device,

[0020] An air inlet groove is provided for applying protective gas to the outer weld of the tank body. The air inlet groove includes side baffles 1 arranged in parallel on both sides of the weld width direction. A front baffle 3 and a rear baffle 8 for closing the air inlet groove are respectively installed at the front and rear ends of the side baffles. An upper baffle 4 for closing the air inlet groove is installed on the top of the side baffles.

[0021] A gas distribution plate 5 is provided in the gas inlet groove and is arranged along the length direction of the weld and is perpendicular to the inner walls of the side baffles on both sides. The gas distribution plate is provided with a plurality of gas distribution holes. The gas distribution plate divides the gas inlet groove into an upper gas inlet groove and a lower gas distribution groove arranged opposite to the outer wall of the tank body. The upper gas inlet groove is provided with an inlet pipe 6 penetrating into the upper gas inlet groove. The wall of the inlet pipe is provided with a plurality of inlet holes for introducing protective gas. The protective gas enters the lower gas distribution groove through the gas distribution holes of the gas distribution plate.

[0022] The outer walls of the side baffles on both sides of the air inlet groove are provided with a positioning chain plate mechanism 10 for sealing with the tank wall.

[0023] The positioning chain plate mechanism is composed of a plurality of chain segments hinged to each other. The first and last chain segments and the middle chain segment are rotatably connected to the side baffles through connecting pins. The first and last chain segments and the middle chain segment are provided with long strip adjustment holes that cooperate with the connecting pins; the long strip adjustment holes on the first and last chain segments are arranged front and back, and the long strip adjustment holes on the middle chain segment are arranged up and down.

[0024] The upper air inlet groove is provided with a buffer steel wire 7 or asbestos wire to buffer and evenly distribute the gas when it enters.

[0025] A fixed installation position 11 for installing the welding gun 2 is arranged at the front baffle of the air inlet slot.

[0026] A handle for pushing the air inlet groove to move along the surface of the cylinder section is installed on the upper part of the upper baffle plate of the air inlet groove.

[0027] The device is to inject argon gas through the air inlet pipe 6, and open an exhaust hole at the upper end of the air inlet pipe 6. In order to make the exhaust range larger and the exhaust more uniform, the air inlet pipe 6 is fixed in the air inlet groove composed of the rear baffle 8, two side baffles 1, the front baffle 3, and the argon distribution plate 5. The steel wire 7 is installed in the upper air inlet groove to buffer the entry of argon gas and enable it to flow out evenly. The positioning chain plate mechanism 10 outside the side baffle adopts a rivet-like structure connection, and the connecting plate positioning chain plate mechanism adopts a chain-like structure. This structure is adopted to adapt to equipment with different diameters. The role of the positioning chain plate mechanism is to prevent gas from flowing out of the side plate and to fit closely with the outer diameter of the tank cylinder. During welding, the cylinder rotates and the welded weld is protected for a longer time in the external weld protection device using argon gas, which can effectively improve the quality of the weld and greatly save the manpower, material and working time costs brought by weld repair. The handle 9, the supporting ear plate, the pad, the hanging ear plate and the nut form a supporting structure so that the weld can be fully protected by the argon gas.

Claims

1. A tank external welding protection device, characterized in that: An air inlet groove is provided for applying protective gas to the outer weld of the tank body. The air inlet groove includes side baffles arranged in parallel on both sides of the weld width direction. The front and rear ends of the side baffles are respectively provided with a front baffle and a rear baffle for closing the air inlet groove. An upper baffle for closing the air inlet groove is installed on the top of the side baffle; A gas distribution plate is provided in the gas inlet groove and is arranged along the length direction of the weld and is perpendicular to the inner walls of the side baffles on both sides. The gas distribution plate is provided with a plurality of gas distribution holes. The gas distribution plate divides the gas inlet groove into an upper gas inlet groove and a lower gas distribution groove arranged opposite to the outer wall of the tank body. The upper gas inlet groove is provided with an inlet pipe penetrating into the upper gas inlet groove. The wall of the inlet pipe is provided with a plurality of inlet holes for introducing protective gas. The protective gas enters the lower gas distribution groove through the gas distribution holes of the gas distribution plate. The outer walls of the side baffles on both sides of the air inlet groove are provided with a positioning chain plate mechanism for fitting and sealing with the tank wall.

2. A tank external welding protection device according to claim 1, characterized in that: The positioning chain plate mechanism is composed of a plurality of chain segments hinged to each other. The first and last chain segments and the middle chain segment are rotatably connected to the side baffles through connecting pins. The first and last chain segments and the middle chain segment are provided with long strip adjustment holes that cooperate with the connecting pins; the long strip adjustment holes on the first and last chain segments are arranged front and back, and the long strip adjustment holes on the middle chain segment are arranged up and down.

3. A tank external welding protection device according to claim 1, characterized in that: The upper air inlet groove is provided with a buffer steel wire or asbestos wire to buffer and evenly distribute the gas when it enters.

4. A tank external welding protection device according to claim 1, characterized in that: A fixed installation position for installing a welding gun is arranged at the front baffle of the air inlet slot.

5. The tank external welding protection device according to claim 1, characterized in that: A handle for pushing the air inlet groove to move along the surface of the cylinder section is installed on the upper part of the upper baffle plate of the air inlet groove.

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