Circumferential weld structure of water heater water tank liner and welding method

Abstract

The invention provides a circumferential weld welding method for a water heater water tank liner. A water tank end socket is welded with a liner body of a water tank. The method comprises the steps that firstly, a lining is welded to the edge of an opening of the liner body of the water tank, the shape of the longitudinal section of the lining is formed by combining a panel and an inclined plane, the panel is provided with two end faces, the inclined plane is connected with a first end face of the panel, the included angle between the inclined plane and the first end face of the panel ranges from 160 degrees to 175 degrees, the thickness of the lining accounts for 80%-150% of the thickness of the liner body, the lining is made of materials same as the materials of which the liner body is made, the lining is welded to the edge of the liner body of the water tank, a second end face of the lining faces the bottom of the liner body, and the inclined plane faces a central axis of the liner body; secondly, the edge of the end socket slides to the position where the edge of the end socket is connected with the liner body in a butt joint mode along the outer side of the lining; thirdly, the outer side of the connecting position of the water tank end socket and the water tank liner body is welded. The lining is arranged on the inner side of the connecting position of the liner body and the end socket, the end socket can slide into the butt joint position along the side face of the lining when the end socket is connected with the liner body welded, and the problem that due to the fact that the butt joint is not even, the subsequent welding quality is affected cannot occur.

Description

technical field

[0001] The invention relates to the field of welding technology, in particular to a ring seam structure and a welding method of an inner tank of a water heater tank. Background technique

[0002] The problem of water tank leakage in the air energy heat pump water heater industry has been plagued by related companies. Most of the leaks in the water tank are due to the insufficient welding strength of the circumferential seam of the water tank liner to cause water leakage. Due to the difficulty of assembly, lap welding has always been used for the girth welding of the water tank liner and head. The pressure-bearing water tank needs to withstand the cyclic pulse pressure of 0.7MPA, and the strength of the lap welding is not enough to support the life of the water tank. Cycles pulsating pressure, resulting in water leaks during use. Contents of the invention

[0003] The purpose of the present invention is to provide a ring seam structure and welding method o...

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