Detachable standard knot device for large-span derrick

The utility model relates to a detachable standard knot device for a large-span derrick, and belongs to the technical field of electric machinery. The detachable ladder stand comprises a detachable standard knot and a ladder stand assembly arranged in the standard knot, and can be used for on-site constructors to walk to the upper part of a holding pole by walking a ladder stand; the detachable standard knot comprises standard knot single pieces and a herringbone support, the herringbone support is used for connecting the two standard knot single pieces and is connected with the cotter pin through a pin shaft, and the crawling ladder assembly comprises a support, a crawling ladder assembly and a platform assembly. According to the utility model, by designing a new structural form, all structural parts are connected and linked with one another, so that the safety in the long-span construction process is guaranteed, the danger coefficient is reduced, and the construction efficiency is improved. 本实用新型涉及一种用于大跨越抱杆