Rotary derrick cap

Abstract

The invention discloses a rotary derrick cap which comprises a sleeve cap for being connected with a derrick body. A cylindrical column vertical to the sleeve cap is fixedly connected onto the upper end surface of the sleeve cap, and the peripheral wall of the column is provided with a hoisting component and an anchor frame successively from bottom to top which are assembled with the outer periphery of the column. The hoisting component comprises a frame-structure square support frame which is sleeved on the column through a cylinder and rotates around the column, and four corners of the square support frame are provided with pulleys for hoisting tower materials respectively. An anchor rod is arranged on a central axis of the square support frame, two ends of the anchor rod are provided with anchor holes respectively which are used for threading anchors controlling the rotation direction of the derrick cap, and hoisting holes for mounting the pulleys are further arranged on the anchor rod. The rotary derrick cap can rotate freely for 360 degrees, the technology of outside anchor and inside suspension is achieved, and simultaneously, tower materials of various weights can be hoisted, the engineering efficiency is improved, and the construction safety is guaranteed.

Description

technical field [0001] The invention relates to a lifting tool in the assembly process of a high-voltage iron tower for erecting an ultra-high-voltage transmission line in the field of electric power construction, in particular to a pole cap installed on the top of a lifting pole. Background technique [0002] In transmission lines, ultra-high-voltage transmission lines need to be erected with high-voltage iron towers, which are generally four sets of square-shaped iron towers assembled vertically from several steel rods. When erecting taller and heavier components such as high-voltage iron towers, the pole is a commonly used hoisting tool. When erecting and assembling iron towers, inner suspension poles are usually used. Inner suspension poles mean that the poles are placed in the center of the tower structure in a suspended state. [0003] The pole generally includes a pole cap and a base, the pole cap and the base are connected through a rod body, and the pole cap includ...

AI Technical Summary

Problems solved by technology

[0005] The commonly used poles are usually inner suspension poles. The pulling method of the inner suspension poles is generally the inner tension wire, and the pole cap of the pole can only rotate a small angle. The outer tension wire of the inner tension pole is located at Below the lifting point, it is easy to cause the tower material to collide with the outer pull wire when hoisting the tower material, which is not conducive to operation, low construction efficiency, and prone to safety accidents

The pole that rotates at a limited angle has great limitations, which is not conducive to conventional construction

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