Built-in keel structure of security door

Abstract

The utility model discloses a built-in keel structure of an anti-theft door, which comprises two side square tubes, and an upper square tube, a plurality of middle square tubes and a lower square tube are sequentially arranged between the two side square tubes from top to bottom; the bottom of the upper square pipe, the tops of the multiple middle square pipes and the top of the lower square pipe are symmetrically and fixedly connected with two inserting blocks, the outer surfaces of the multiple inserting blocks are sleeved with limiting inserting grooves, and the limiting inserting grooves are fixedly connected with the adjacent side square pipes. And two pieces of C-shaped steel are symmetrically and fixedly connected to one side of the outer surface of each middle square pipe in an embedded mode, and elastic pieces are jointly installed in the multiple pieces of C-shaped steel on the same side in an abutting mode. According to the novel anti-theft door keel, through modular design and plug-in connection, the installation mode of a traditional anti-theft door keel is obviously optimized, rapid splicing can be achieved, field welding is not needed, the installation efficiency is greatly improved, dependence on the technology of workers is reduced, the novel anti-theft door keel is suitable for efficient and large-batch production scenes, and meanwhile later maintenance and replacement are facilitated.