Double-layer formed thick-wall pipe fitting and connecting assembly

The utility model relates to the technical field of pipe joints, in particular to a double-layer formed thick-wall pipe fitting which comprises an inner sleeve and an outer sleeve, a limiting portion enabling the inner sleeve and the outer sleeve to be connected more tightly is arranged outside the inner sleeve, the inner sleeve is wrapped by the outer sleeve, and the inner sleeve and the outer sleeve are integrally formed through injection molding. Through the layered design, the thick-wall pipe fitting is divided into the inner sleeve and the outer sleeve and is subjected to injection molding and cooling for several times, and the molding of the thick-wall pipe fitting is converted into the molding of a common pipe fitting, so that the common problems in the injection molding and cooling of the thick-wall pipe fitting are avoided. 本实用新型涉及管接头技术领域，更具体地，涉及一种双层成型厚壁管件，包括内套管与外套管，所述内套管外部设有使内套管与外套管连接更紧密的限位部，所述内套管被外套管包裹在内，内套管与外套管通过注塑一体成型。本实用新型通过分层设计，将厚壁管件分为内套管与外套管两个部分并进行分次注塑冷却，将厚壁管件的成型转换为普通管件的成型，从而规避了厚壁管件注塑冷却中常见的问题。