Welding torch shield

Abstract

The invention relates to auxiliary equipment for gas welding. The technical result is achieved by a welding torch shield comprising a front section (1) and a rear section (3) that are mounted to a centre section (2) by a hinged connection (4), wherein the front section (1) and the rear section (3) contain grooves (9) for the attachment of seals (10) and further contain a multi-layered plate (12) having a top layer in the form of a mesh with a cell side length of from 0.2 mm to 0.5 mm, a middle layer in the form of a mesh with a cell side length of from 0.02 mm to 0.03 mm and a bottom layer in the form of a perforated sheet with a cell size of from 0.5 mm to 0.8 mm and a spacing of from 1.0 mm to 1.5 mm between the cells, and the centre section (2) contains sidewalls (11) which curve radially inward toward a base or radially outward away from the base.

Description

[0001] Welding torch cover

[0002] Description

[0003] The invention relates to auxiliary equipment for gas welding.

[0004] A protective cover for argon-arc welding of titanium and titanium alloy pipes and a method for using the same are known, which disclose a protective cover for argon-arc welding of titanium and titanium alloy pipes; the protective cover comprises a cover, connecting plates, an argon inlet connection, a diaphragm and a handle, wherein the left side, the right side and the front end of the cover are in a closed position; the lower end surface of the cover cover is provided with a connecting hole; two side edges of the connecting port are provided with connecting plates; the fastening plates are fastened to the outer wall of the pipeline being welded; the hole is located in the rear part of the cover; the argon supply pipe is distributed over the upper surface of the cover;the argon inlet connection communicates with the inside of the cover shell, the diaphragm is disposed in the cover shell, the inside space of the cover is divided by the diaphragm into an upper gas storage space and a lower protective space, and the handle is welded to the cover. In the invention, the protective cover is used to block and cool the welding part and the air when titanium and titanium alloy pipelines are subjected to argon arc welding using the protective cover, so as to avoid brittle fracture caused by oxygen, nitrogen, hydrogen, carbon and other elements sucked into the air during welding in a high-temperature state. [CN109500476 (A), published on 22.03.2019].;

[0005] The disadvantage of this analogue is the inability to use it when welding a shell, as well as the inability to adjust the radius of the circle to improve the quality of welding.

[0006] Also known is a welding torch pad for gas protection, comprising walls and an upper cylindrical bent plate fixed between them, on which a welding torch retainer stand is mounted and an opening is made for fixing a hose for supplying shielding gas in it, wherein on the side of the welding torch retainer an arc groove is made in the plate, characterized in that the walls are made of an aluminum cylindrical bent profile with grooves, side seals are fixed in the grooves on the lower edges of the walls with the formation of a widening in the lower part of the pad, and an end seal is fixed on the hose fastening side, while a gas flow divider is mounted in the hole for fixing the hose, and under the upper cylindrical bent plate in the grooves of the walls a multilayer cylindrical bent plate is fixed, the upper layer of which is made in the form of a mesh, the cell size of which is from 0.2x0.2 mm to 0.5x0.5 mm, the middle layer is made in the form meshes with cells 0.025x0,025 mm, and the bottom layer is made in the form of a perforated sheet with a cell size and a pitch between cells from Rv 0.5-1.0 mm to Rv 0.8-1.5 mm. [RU216231U1, published 24.01.2023].,

[0007] The disadvantage of this analogue is the impossibility of using it on large-radius shells. The closest technical solution is described in a welding torch pad containing walls and an upper plate fixed between them, on which a welding torch retainer stand is mounted and an opening is made for fixing a hose for supplying shielding gas in it, and on the side of the welding torch retainer an arc groove is made in the plate, characterized in that the walls are made of an aluminum profile with grooves, side seals are fixed in the grooves on the lower edges of the walls with the formation of a widening in the lower part of the pad, and an end seal is fixed on the side of the hose fastening, while a gas flow divider is mounted in the hole for fixing the hose, and under the upper plate a multilayer plate is fixed in the grooves of the walls, the upper layer of which is made in the form of a mesh, the cell size of which is from 0.2 x 0.2 mm to 0.5 ^ 0.5 mm,the middle layer is made in the form of a mesh with cells of 0.025x0.025 mm, and the bottom layer is made in the form of a perforated sheet with a cell size and a pitch between cells from Rv 0.5-1.0 mm to Rv 0.8-1.5 mm. [RU215842U1 published 28.12.2022].,

[0008] The disadvantage of the closest technical solution is the lack of the ability to effectively weld circumferential seams.

[0009] The technical problem solved by the claimed invention is the elimination of the shortcomings of analogues.

[0010] The objective of the invention is to increase the versatility and quality of welding.

[0011] The technical result of the claimed invention consists in increasing the versatility of the welding torch pad and improving the quality of welding when using the welding torch pad.

[0012] The specified technical result is achieved in that the overlay on the welding torch comprises a front, central and rear sections, where the front and rear sections are mounted to the central section by means of a hinged connection, wherein each section comprises a nozzle for supplying inert gas, the front section comprises a gas torch mount in the form of a bracket with a clamp, the front and rear sections comprise grooves for fastening seals made of silicone, wherein the seals in the front section are mounted to the side walls of the front section and are made in the form of a rectangular trapezoid, where the inclined sides face the central section, and the seal in the rear section is made as a single part in the form of an isosceles trapezoid and is mounted to the side walls and the rear wall of the rear section, wherein the front, central and rear sections comprise a multilayer plate, in which the top layer is made in the form of a mesh with a cell side length from 0.2 mm to 0.5 mm,the middle layer is made in the form of a mesh with a cell side length from 0.02 mm to 0.03 mm, and the bottom layer is made in the form of a perforated sheet with a cell size from 0.5 mm to 0.8 mm and a pitch between cells from 1.0 mm to 1.5 mm, the central section contains sidewalls made radially concave towards the base or radially convex towards the side opposite the base.

[0013] In particular, the front, center and rear sections are made of aluminum alloy;

[0014] In particular, the bottom layer of the plate is made in the form of a perforated sheet with round cells and the arrangement of the cells in the form of offset rows;

[0015] In particular, the seals are removable. The proposed image is illustrated with figures.

[0016] Fig. 1 shows a general view of the overlay on the welding torch for welding circumferential seams from the outside;

[0017] Fig. 2 shows a general view of the overlay on the welding torch for welding circumferential seams from the inside;

[0018] Fig. 3 shows a front view of the rear section of the welding torch cover;

[0019] Fig. 4 shows a bottom view of the welding torch cover;

[0020] Fig. 5 shows a general view of the central section of the welding torch pad with sidewalls radially concave towards the base;

[0021] Fig. 6 shows a general view of the central section of the welding torch pad with sidewalls radially convex in the direction opposite to the base.

[0022] The following are indicated on the figures: 1 - front section, 2 - central section, 3 - rear section, 4 - hinge joint, 5 - nipple, 6 - fastening, 7 - bracket, 8 - clamp, 9 - groove, 10 - seal, 11 - sidewall, 12 - plate,

[0023] According to the invention, the welding torch pad comprises a front section 1, a central section 2 and a rear section 3, connected to each other by a hinge joint 4, which significantly increases the versatility of the welding torch pad due to the fact that the pad design allows for adjusting the angle of inclination between the sections to ensure improved quality of welding of circumferential seams both on the outer side of the shell (Fig. 1) and on the inner side (Fig. 2), while the use of this pad can be carried out on shells of large cross-sectional diameters, for example from 160 mm.

[0024] The front section 1, the central section 2 and the rear section 3 contain a nozzle 5 for supplying inert gas, which ensures uniform distribution of inert gas throughout the entire internal part of the pad, covering the weld with inert gas regardless of the position of the front section 1, the central section 2 and the rear section 3 relative to each other, which significantly affects the versatility of use of the entire device, as well as improving the quality of the welding performed.

[0025] The front section 1 of the welding torch pad contains a gas torch mount 6 in the form of a bracket 7 with a clamp 8, which is necessary for securely fixing the gas torch, as well as its position during welding.

[0026] The front section 1 and the rear section 3 contain grooves 9 (Fig. 3) for fastening seals 10, which provide a barrier preventing the inert gas from escaping away from the weld, which ensures the quality of welding. The presence of seals 10 on the front section 1 and on the rear section 3 ensures the versatility of using the overlay on the welding torch due to the repetition of the angle of inclination between the sections of the overlay, which ensures an increase in the quality of welding due to the prevention of the inert gas from escaping beyond the inner part of the overlay.

[0027] The seals 10 are made of silicone, which significantly affects the increase in versatility when using the pad on the welding torch, as well as the improvement of the welding quality due to the elasticity of this material, allowing it to repeat the shape of the welded structure as the welding equipment moves, which prevents the inert gas from escaping beyond the inner part of the pad. The seals 10 in the front section 1 are made in the form of a rectangular trapezoid, where the inclined sides face the central section 2 and overlap the sidewalls 11 of the central section 2 by at least half of their length, which prevents the inert gas from escaping from the sidewalls 11 of the central section 2 when welding a circumferential seam from the inside, which ensures an increase in the welding quality at any angle of inclination between the front section 1 and the rear section 3.

[0028] The seal 10 in the rear section 3 is made as a single part in the shape of an isosceles trapezoid and is mounted to the side walls and the rear wall of the rear section 3, wherein the inclined sides face the central section 2 and overlap the sidewalls 11 of the central section 2 by at least half their length, which prevents the escape of inert gas from the sidewalls 11 of the central section 2 during welding of the circumferential seam from the inside, which ensures an increase in the quality of welding at any angle of inclination between the front section 1 and the rear section 3. The implementation of the seal 10 in the rear section 3 as a single part makes it possible to ensure an increase in the quality of welding due to the absence of gaps between the seals 10 between the side walls and the rear wall of the rear section 3.

[0029] The central section 2 and the rear section 3 comprise a multilayer plate 12 (Fig. 4), in which the upper layer is made in the form of a mesh with a cell side length from 0.2 mm to 0.5 mm, the middle layer is made in the form of a mesh with a cell side length from 0.02 mm to 0.03 mm, and the lower layer is made in the form of a perforated sheet with a cell size from 0.5 mm to 0.8 mm and a pitch between cells from 1.0 mm to 1.5 mm. The presence of plate 12, its multilayer execution with certain mesh dimensions and perforation ensures the transformation of the turbulent flow of inert gas into laminar, which significantly improves the quality of welding due to the fact that the upper layer and the middle layer of the mesh divide the turbulent flows of inert gas into laminar subflows, and the lower layer divides the flows of inert gas into several laminar subflows with increased pressure necessary to fill the entire space formed under the overlay on the welding torch.It is unacceptable to make the top layer in the form of a mesh with a cell side length less than 0.2 mm, since this will create excess pressure on the middle layer, and a cell side length greater than 0.5 will not provide sufficient laminarity of the inert gas flow. It is unacceptable to make the middle layer in the form of a mesh with a cell side length less than 0.02 mm due to the excess pressure created inside the overlay on the welding torch, and a cell side length greater than 0.03 will not provide sufficient laminarity of the inert gas flow. It is justified by the fact that a cell size less than the declared one increases the pressure inside the overlay chamber to an unacceptable value, and a cell size greater than the declared one does not provide the required inert gas pressure at the outlet of the plate 12.

[0030] The central section 2 comprises sidewalls 11 made radially concave towards the base of the central section 2 (Fig. 5) or radially convex towards the side opposite to the base of the central section 2 (Fig. 6). Making the sidewalls 11 of the central section 2 radially concave towards the base significantly improves the quality of welding the circumferential seams on the outside of the shell due to the sidewalls 11 adhering to the walls of the shell and repeating its circumference, which is an effective barrier for the inert gas and prevents its significant leaks beyond the working area of ​​the pad on the welding torch. Making the sidewalls 11 of the central section 2 radially convex towards the side opposite to the base significantly improves the quality of welding the circumferential seams from the inside of the shell due to the sidewalls 11 adhering to the walls of the shell and repeating its circumference, which is an effective barrier for the inert gas and prevents its significant leaks beyond the working area of ​​the pad on the welding torch.The use of the central section 2 with sidewalls 11, made radially concave towards the base or radially convex towards the side opposite the base, significantly increases the versatility of the welding torch due to the possibility of using it when welding annular seams both outside the shell and inside, as well as when welding linear seams.

[0031] The front section 1, central section 2 and rear section 3 of the welding torch pad are made of aluminum alloy, which ensures the low weight of the device, which, if necessary, can additionally affect the versatility of the welding torch pad by increasing the mobility and ease of use of this device in manual mode.

[0032] The lower layer of plate 12 is made in the form of a perforated sheet with round cells and the arrangement of cells in the form of offset rows, which, if necessary, can additionally improve the quality of welding due to the uniform distribution of laminar flows of inert gas throughout the working area of ​​the overlay on the welding torch.

[0033] The seals 10 are removable, which, if necessary, can further increase the versatility of the welding torch pad due to the possibility of replacing the seals 10 if they fail, as well as if it is necessary to use seals 10 with a thickness different from the standard.

[0034] 1. Thus, the design of the welding torch pad in the form of a front section 1, a central section 2 and a rear section 3, where the front section 1 and the rear section 3 are mounted to the central section 2 by means of a hinged connection 4, wherein each section contains a nozzle 5 for supplying inert gas, the front section 1 contains a gas torch mount 6 in the form of a bracket 7 with a clamp 8, the front section 1 and the rear section 3 contain grooves 9 for fastening seals 10 made of silicone, wherein the seals 10 in the front section 1 are mounted to the side walls of the front section 1 and are made in the form of a rectangular trapezoid, where the inclined sides face the central section 2, and the seal 10 in the rear section 3 is made as a single part in the form of an isosceles trapezoid and is mounted to the side walls and the rear wall of the rear section 3, where the front section 1, the central section 2 and the rear section 3 comprise a multilayer plate 12,in which the upper layer is made in the form of a mesh with a cell side length from 0.2 mm to 0.5 mm, the middle layer is made in the form of a mesh with a cell side length from 0.02 mm to 0.03 mm, and the lower layer is made in the form of a perforated sheet with a cell size from 0.5 mm to 0.8 mm and a pitch between cells from 1.0 mm to 1.5 mm, the central section 2 contains sidewalls 11 made radially concave toward the base or radially convex toward the side opposite to the base, which together makes the overlay on the welding torch universal and improves the quality of welding when using the overlay on the welding torch.

[0035] Examples of implementation.

[0036] First example of implementation. The welding torch cover comprises a front section 1, a central section 2 and a rear section 3 made of an aluminum alloy, where the front section 1 and the rear section 3 are mounted to the central section 2 by means of a hinged connection 4, wherein each section comprises a nozzle 5 for supplying inert gas, the front section 1 comprises a gas torch mount 6 in the form of a bracket 7 with a clamp 8, the front section 1 and the rear section 3 comprise grooves 9 for fastening seals 10 made of silicone and made removable, wherein the seals 10 in the front section 1 are mounted to the side walls of the front section 1 and are made in the form of a rectangular trapezoid, where the inclined sides face the central section 2, and the seal 10 in the rear section 3 is made as a single part in the form of an isosceles trapezoid and is mounted to the side walls and the rear wall of the rear section 3, where is the front section 1,the central section 2 and the rear section 3 comprise a multilayer plate 12, in which the upper layer is made in the form of a mesh with a cell side length of 0.2 mm, the middle layer is made in the form of a mesh with a cell side length of 0.02 mm, and the lower layer is made in the form of a perforated sheet with a cell size of 0.5 mm and a pitch between the cells of 1.0, wherein the lower layer of the plate 12 is made in the form of a perforated sheet with round cells and an arrangement of the cells in the form of offset rows, where the central section 2 comprises sidewalls 11 made radially concave toward the base or radially convex toward the side opposite the base.

[0037] Second example of implementation.

[0038] The welding torch cover comprises a front section 1, a central section 2 and a rear section 3 made of an aluminum alloy, where the front section 1 and the rear section 3 are mounted to the central section 2 by means of a hinged connection 4, wherein each section comprises a nozzle 5 for supplying inert gas, the front section 1 comprises a gas torch mount 6 in the form of a bracket 7 with a clamp 8, the front section 1 and the rear section 3 comprise grooves 9 for fastening seals 10 made of silicone and made removable, wherein the seals 10 in the front section 1 are mounted to the side walls of the front section 1 and are made in the form of a rectangular trapezoid, where the inclined sides face the central section 2, and the seal 10 in the rear section 3 is made as a single part in the form of an isosceles trapezoid and is mounted to the side walls and the rear wall of the rear section 3, where the front section 1, the central section 2 and the rear section 3 comprise a multilayer plate 12,in which the upper layer is made in the form of a mesh with a cell side length of 0.35 mm, the middle layer is made in the form of a mesh with a cell side length of 0.025 mm, and the lower layer is made in the form of a perforated sheet with a cell size of 0.65 mm and a pitch between the cells of 1.25, wherein the lower layer of the plate 12 is made in the form of a perforated sheet with round cells and an arrangement of the cells in the form of offset rows, where the central section 2 contains sidewalls 11 made radially concave toward the base or radially convex toward the side opposite the base.

[0039] Third example of implementation.

[0040] The welding torch cover comprises a front section 1, a central section 2 and a rear section 3 made of an aluminum alloy, where the front section 1 and the rear section 3 are mounted to the central section 2 by means of a hinged connection 4, wherein each section comprises a nozzle 5 for supplying inert gas, the front section 1 comprises a gas torch mount 6 in the form of a bracket 7 with a clamp 8, the front section 1 and the rear section 3 comprise grooves 9 for fastening seals 10 made of silicone and made removable, wherein the seals 10 in the front section 1 are mounted to the side walls of the front section 1 and are made in the form of a rectangular trapezoid, where the inclined sides face the central section 2, and the seal 10 in the rear section 3 is made as a single part in the form of an isosceles trapezoid and is mounted to the side walls and the rear wall of the rear section 3, where the front section 1, the central section 2 and the rear section 3 comprise a multilayer plate 12,in which the upper layer is made in the form of a mesh with a cell side length of 0.5 mm, the middle layer is made in the form of a mesh with a cell side length of 0.03 mm, and the lower layer is made in the form of a perforated sheet with a cell size of 0.8 mm and a pitch between the cells of 1.5, wherein the lower layer of the plate 12 is made in the form of a perforated sheet with round cells and an arrangement of the cells in the form of offset rows, where the central section 2 contains sidewalls 11 made radially concave toward the base or radially convex toward the side opposite the base.

[0041] Thus, the claimed invention, due to the technologies used in it, the combination of their characteristics and interrelations, has a positive effect on the final product and ensures an increase in the versatility of the gas torch overlay, and also improves the quality of welding when using the overlay on the welding torch.

Claims

Formula 1. A cover plate for a welding torch comprising a front, central and rear sections, where the front and rear sections are mounted to the central section by means of a hinged connection, wherein each section comprises a nozzle for supplying inert gas, the front section comprises a gas torch mount in the form of a bracket with a clamp, the front and rear sections comprise grooves for mounting seals made of silicone, wherein the seals in the front section are mounted to the side walls of the front section and are made in the form of a rectangular trapezoid, where the inclined sides face the central section, and the seal in the rear section is made as a single piece in the form of an isosceles trapezoid and is mounted to the side walls and the rear wall of the rear section, wherein the front, central and rear sections comprise a multilayer plate, in which the top layer is made in the form of a mesh with a cell side length of from 0.2 mm to 0.5 mm, the middle layer is made in the form of a mesh with a cell side length of from 0.02 mm to 0.03 mm, and the bottom layer is made in the form of a perforated sheet with a cell size from 0.5 mm to 0.8 mm and a pitch between cells from 1.0 mm to 1.5 mm, the central section contains sidewalls made radially concave towards the base or radially convex towards the side opposite to the base.

2. A cover for a welding torch according to item 1, characterized in that the front, central and rear sections are made of aluminum alloy.

3. A cover plate for a welding torch according to item 1, characterized in that the lower layer of the plate is made in the form of a perforated sheet with round cells and the arrangement of the cells in the form of offset rows.

4. A cover for a welding torch according to item 1, characterized in that the seals are removable.

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