Back protection device convenient to weld

Abstract

The back protection device comprises a bottom plate, a top plate and an annular plate, the bottom plate and the top plate are installed at an opening of the annular plate to form a shell, and an air inlet pipe communicated with the shell is installed on the outer side wall of the top plate and used for being connected with an argon bottle. A gas outlet assembly used for discharging gas in the shell to the periphery is installed on the outer side wall of the annular plate, a dispersing assembly used for dispersing the gas is arranged in the shell, and the device is suitable for welding of welding tools of expanded flap structures and welding of annular welding seams. Gas is uniformly dispersed to each gas outlet pipe and is conveyed to each position of a welding tool through a plurality of pipe fittings, so that a welding bead is effectively protected from being oxidized, single-side welding and double-side forming are realized, and the strength of a welding seam is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding protection, and specifically relates to a back protection device which is convenient for welding. Background Art

[0002] When welding on a welding tool with an expansion flap structure, that is, to protect the annular weld, it is necessary to flush gas into the inside of the annular weld to avoid oxidation of the welded part. However, the internal space is small and the gas needs to be evenly dispersed inside the annular weld. Traditional back protection devices are very inconvenient to use on welding tools with expansion flap structures and when welding annular welds. Therefore, a back protection device for annular weld welding is proposed. Utility Model Content

[0003] The purpose of the utility model is to provide a back protection device which is convenient for welding, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a back protection device that is easy to weld, comprising a bottom plate, a top plate and an annular plate, wherein the bottom plate and the top plate are respectively installed at the opening of the annular plate to form a shell, the outer wall of the top plate is installed with an air inlet pipe connected to the shell for connecting to an argon gas cylinder, the outer wall of the annular plate is installed with an air outlet assembly for discharging the gas in the shell to the surroundings, and a dispersion assembly for dispersing the gas is arranged in the shell.

[0005] Preferably, the gas outlet assembly includes a pipe fitting, a plurality of the pipe fittings are evenly distributed in a ring shape and connected to the ring plate, and the pipe fittings are communicated with the interior of the shell.

[0006] Preferably, the pipe fitting includes an air outlet pipe and an internally threaded pipe, the air outlet pipe is evenly distributed in a ring shape and welded to the annular plate, and the internally threaded pipe is threadedly connected to the air outlet pipe to adjust the overall length.

[0007] Compared with the prior art, the utility model has the following beneficial effects: a back protection device which is convenient for welding, suitable for welding tools with expansion flap structures and welding of annular welds, the air inlet pipe is connected through an argon gas bottle, and when the gas enters the device and passes through the dispersion component, the gas is evenly dispersed to each air outlet pipe, and the gas is delivered to various parts of the welding tooling through multiple pipes, effectively protecting the weld from oxidation, realizing single-sided welding and double-sided forming, and increasing the strength of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the structure of the pipe fitting and the annular plate of the utility model in a vertical state;

[0009] Figure 2 This is a schematic diagram of the structure of the pipe fitting and the annular plate of the utility model in an inclined state;

[0010] Figure 3 For Figure 1 Structural disassembly diagram in the middle;

[0011] Figure 4 Schematic diagram of the adjustable-length pipe fitting of the present utility model being perpendicular to the annular plate;

[0012] Figure 5 Schematic diagram of the adjustable-length pipe fitting of the present utility model being at an inclined angle with the annular plate.

[0013] In the figure: 1 - bottom plate, 2 - top plate, 3 - annular plate, 4 - intake pipe, 5 - dispersion assembly, 6 - pipe fitting, 61 - outlet pipe, 62 - internally threaded pipe. Specific implementation manner

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0015] Embodiment 1

[0016] Please refer to Figure 1 、 3 and 4, the present utility model provides a technical solution: a back protection device convenient for welding, including a bottom plate 1, a top plate 2 and an annular plate 3. The bottom plate 1 and the top plate 2 are respectively installed at the opening of the annular plate 3 to form a housing. An intake pipe 4 communicating with the housing is installed on the outer side wall of the top plate 2 for connecting with an argon gas cylinder. A gas outlet assembly for discharging the gas in the housing to the surrounding is fixedly connected to the outer side wall of the annular plate 3. A dispersion assembly 5 for dispersing the gas is arranged in the housing.

[0017] The gas outlet assembly includes a pipe fitting 6. A plurality of the pipe fittings 6 are evenly distributed in a ring and connected to the annular plate 3. The pipe fitting 6 is internally communicated with the inside of the housing.

[0018] The pipe fitting is a straight pipe and is perpendicularly arranged with respect to the annular plate. Argon gas enters the housing from the intake pipe, and then is evenly dispersed to each pipe fitting through the dispersion assembly. The gas is sent to various parts of the welding tooling through the pipe fitting, effectively protecting the weld bead from oxidation, realizing one-sided welding with double-sided formation, and increasing the weld strength.

[0019] In order to make the pipe fittings adapt to the size of welding tools (welding of protective annular welds) of different expansion flap structures and adjust the length of the pipe fittings, the pipe fittings 6 include an air outlet pipe 61 and an internal threaded pipe 62. The air outlet pipe 61 is evenly distributed in an annular shape and welded to the annular plate 3. The internal threaded pipe 62 is screwed to the air outlet pipe 61 to adjust the overall length.

[0020] The dispersion component is a steel wool ball that fills the inside of the shell, so that the gas is sent to the pipe fittings through the gaps inside the steel wool ball, making the air outlet of the pipe fittings more uniform.

[0021] Embodiment 2

[0022] See also Figure 2 and 5 The utility model provides another technical solution, which is different from the first embodiment in that an air inlet pipe 4 connected to the shell is rotatably installed on the outer wall of the top plate 2 for connecting to the argon gas cylinder, and an air outlet assembly for discharging the gas in the shell to the surrounding is fixedly connected to the outer wall of the annular plate 3, and the air outlet assembly includes a pipe fitting 6, and a plurality of the pipe fittings 6 are evenly distributed in a ring shape and connected to the annular plate 3. The pipe fitting 6 is connected to the inside of the shell, and the pipe fitting is a straight pipe and is inclined to the annular plate. The gas is ejected from the inclined straight pipe. The plurality of pipe fittings are inclined in the same direction at a certain angle. When the gas is ejected, the shell can be driven to rotate on the air inlet pipe, and the gas is delivered to various parts of the welding tooling, effectively protecting the weld from oxidation, realizing single-sided welding and double-sided forming, and increasing the strength of the weld.

[0023] In order to make the pipe fittings adapt to the size of welding tools (welding of protective annular welds) of different expansion flap structures and adjust the length of the pipe fittings, the pipe fittings 6 include an air outlet pipe 61 and an internal threaded pipe 62. The air outlet pipe 61 is evenly distributed in an annular shape and welded to the annular plate 3. The internal threaded pipe 62 is screwed to the air outlet pipe 61 to adjust the overall length.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A back protection device for facilitating welding, characterized in that: The invention comprises a bottom plate (1), a top plate (2) and an annular plate (3), wherein the bottom plate (1) and the top plate (2) are respectively mounted at the opening of the annular plate (3) to form a shell, an outer wall of the top plate (2) is mounted with an air inlet pipe (4) connected to the shell for connecting to an argon gas cylinder, an outer wall of the annular plate (3) is mounted with an air outlet component for discharging the gas in the shell to the surroundings, and a dispersion component (5) for dispersing the gas is arranged in the shell.

2. The back protection device for facilitating welding according to claim 1, characterized in that: The gas outlet assembly comprises a pipe (6), a plurality of the pipes (6) are evenly distributed in an annular shape and connected to the annular plate (3), and the pipes (6) are in communication with the interior of the shell.

3. The back protection device for facilitating welding according to claim 2, characterized in that: The pipe fitting (6) comprises an air outlet pipe (61) and an internally threaded pipe (62); the air outlet pipe (61) is evenly distributed in an annular shape and welded to the annular plate (3); the internally threaded pipe (62) is threadedly connected to the air outlet pipe (61) to adjust the overall length.

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