Sleeve-shaped flat nozzle device for narrow-gap welding and using method thereof

Abstract

The invention discloses a sleeve-shaped flat nozzle device for narrow-gap welding and a using method of the sleeve-shaped flat nozzle device. The sleeve-shaped flat nozzle device comprises a funnel-shaped or straight-barrel-shaped or stepped-barrel-shaped flat nozzle or comprises a nozzle and a nozzle seat which are connected through a screw or bolt connecting mechanism. A flanging flange is arranged at the top end of the nozzle, the water-cooling nozzle body is flat or flat arc-shaped, the nozzle seat is provided with a top end outer convex shoulder and a bottom end outer convex shoulder, andan air screen is arranged at the upper part in the nozzle and / or the bottom end of the nozzle seat. By means of the T-shaped bolt connecting mechanism and a U-shaped hole or a kidney-shaped hole in the flanging flange at the top end of the nozzle, rapid sealing connection of elastic locking between the nozzle and the nozzle seat can be achieved. By arranging process plates on the two side walls of a groove or attaching high-temperature-resistant adhesive tape to the outer side face of the lower end of the nozzle, full-length or full-groove welding use of the nozzle with an arc-shaped notch can be achieved. The nozzle can be made of metal or ceramic materials and is simple in structure, capable of being rapidly connected / detached, good in sealing connection effect and high in practicability.

Description

Technical field[0001]The invention belongs to the technical field of arc welding, and relates to a nozzle device for welding, in particular to a sleeve-shaped flat nozzle device for narrow gap arc welding and a method of use thereof.Background technique[0002]In narrow gap gas shielded arc welding, I-shaped or U-shaped narrow gap grooves are usually used. Generally speaking, when the groove depth of the narrow gap exceeds 30-40mm, it is difficult for the external sleeve-shaped nozzle to provide effective gas protection. At this time, in order to deliver the welding shielding gas to the depth of the narrow gap groove for arc welding In the area, a side-mounted or sleeve-type flat nozzle mechanism that can extend into the groove is required. When using side-mounted gas nozzles for narrow-gap molten metal gas shielded arc welding, usually two flat nozzles are placed on both sides of the welding conductive rod and the conductive nozzle. At this time, the conductive rod does not pass thro...

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Problems solved by technology

The Chinese patent application with the publication number CN104162729A discloses "a kind of internal / external multiple protection narrow gap / ultra-narrow gap welding nozzle". air sieve), the nozzle body is made of ceramic material or treated with ceramic spraying on the surface, and connected to the welding torch through ordinary screws; its disadvantages are: (1) The nozzle structure is complex, and it is difficult to make when using ceramic materials or surface spraying ceramics , the implementation cost is high; (2) There is no flanging flange on the top of the nozzle, and it is difficult to achieve a sealed connection between the nozzle and the torch body through a seal; (3) The nozzle and the welding torch (torch) body are connected by ordinary screws , It is time-consuming and labor-intensive to install / replace the nozzle, and it is inconvenient to use; (4) The nozzle and the torch body are rigidly connected by screws, so that the nozzle is easily damaged when it encounters rigid collision or rigid extrusion in the groove, for example, if it encounters When rigid extrusion is caused by solidified welding spatter or deformed groove surface, the environmental adaptability is not strong; (5) The lower side of the nozzle is not provided with an arc-shaped notch, which is not suitable for bending conductive rod type or curved electrode type shaking / rotation Arc narrow gap gas shielded welding has a narrow scope of application; (6) In the case where the nozzle is directly connected to the torch body, it is necessary to replace the nozzle to meet the matching requirements of different welding torches, and the versatility of the nozzle is not strong

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