Multi-layer safety construction platform device for mounting pressure steel pipe of vertical shaft

The utility model discloses a multilayer safety construction platform device for mounting a pressure steel pipe of a vertical shaft, which comprises a first construction platform, a second construction platform and a third construction platform from top to bottom, and further comprises a top layer platform positioned at the upper part of the first construction platform and supported on the first construction platform through upright posts, a channel is arranged on the top-layer platform, a hatch cover used for sealing the channel is hinged to the channel, a ladder stand used for allowing constructors to go up and down is arranged between the first construction platform and the channel, and lifting lugs used for lifting the construction platform devices are arranged on the top-layer platform. In the construction process, the cover plate and the cabin cover of the top-layer platform effectively ensure the safety of constructors in the platform, and the safety performance is greatly improved; and meanwhile, cons