Super-long single-section telescopic boom device for deep-sea scientific investigation hoisting

The invention relates to a super-long single-section telescopic boom device for deep-sea scientific investigation hoisting, which comprises a main boom assembly, an upper guide pulley block, an extension boom assembly, a bottom pulley block and a floating slide block assembly, the main boom assembly is connected with the extension boom assembly through the floating slide block assembly, and a telescopic oil cylinder is connected between the main boom assembly and the extension boom assembly; an upper guide pulley block is installed in the middle of the main arm assembly, and a bottom pulley block is installed at the tail end of the extension arm assembly and used for guiding an umbilical cable to the position above a CTD to be connected with the CTD. The device has an ultra-long telescopic stroke, and it can be ensured that the CTD is lowered to the position near the water surface; and the weight of the umbilical cable and the CTD in water and various underwater influences can be borne. 本发明涉及一种用于深海科考吊放的超长单节伸缩