Connecting structure of feeding cabin and standard unit pipe joint and comprehensive pipe rack with variable section

The invention discloses a connecting structure of a feeding cabin used for a steel-structure comprehensive pipe rack and a standard unit pipe joint. The comprehensive pipe rack is assembled through a unit plate sheet along the peripheral direction to form the standard unit pipe joint; the unit pipe joint is assembled along the axial direction to form the pipe rack; the pipe rack is provided with a feeding cabin with a section, which is inconsistent to the section of the standard unit pipe joint, at interval along the axial direction; and the feeding cabin and the standard unit pipe joint are connected through a transition joint with a variable section. According to the connecting structure disclosed by the invention, the connection between the standard unit pipe joint and the feeding cabin is realized through the transition joint with the variable section, and the technical difficulty that the steel-structure comprehensive pipe rack has the variable section and is difficult to engage is solved. 本发明公开了种用于钢结构综合