A hoisting apparatus for use in a confined space and including a cantilevered telescopic boom

摘要

Hoisting apparatus, more particularly for use in a nuclear power plant to avoid moving suspended loads through the space above the reactor tank (2), comprises, mounted on a stationary structure (5) of said plant, a crane (7) having a telescopic boom (8) and three security systems, respectively an orientation security system (SSO) for forbidding a determined angular range theta in angular lateral displacement when the boom reach is greater than Pm, a boom raising security system (LRF) limiting the raised position of the boom to a predetermined level, and a load state control (CEC) for insuring a permanent control with automatic cut-off for the boom in dependence of its extension length and of the lifted loads. Said security systems may be selectively inhibited. All the manoeuvring and indicating means are grouped on a transportable remote control operator console. IMAGE