3 results about "Narrow channel" patented technology

The application discloses a foldable ladder suitable for narrow channels, which comprises a ladder module and a ladder frame retaining structure, and the upper part of the ladder module is connected with a high point platform, which can be folded / unfolded and locked and positioned according to the state. The ladder module comprises two parallel main ladder beams and a step structure, the main ladder beams are connected with the high point platform through hinging or sliding groove sliding mode, and the step structure is divided into a fixed type and a follow-up adjusting type; the follow-up adjusting type realizes the form switching of the wall ladder in the storage state and the horizontal step ladder in the unfolded state through a parallelogram folding structure. The ladder module is integrated with an auxiliary carrying device, the carrying platform is realized through the cooperation of a linear guide shaft and a sliding shaft sleeve to realize the lifting of goods, a ratchet and a pawl constitute a retreat stopping structure to prevent falling, and a traction line guarantees the synchronous movement of both sides. The ladder occupies a small space after being folded, is safe and stable in passing after being unfolded, has the function of carrying goods, is suitable for narrow channel scenes such as the bottom layer of a ship engine room, and meets the needs of personnel passing and equipment maintenance operation.