Lifting hook for lifting concrete pipes

Abstract

The invention relates to a lifting hook for lifting concrete pipes. The lifting hook is of an L-shaped structure, wherein a transverse part is arranged longitudinally inside; elastic plates are arranged on the upper end face and the inner end face of the transverse part. The lifting hook has the advantages that the upper end face of the transverse part of the lifting hook is equipped with the elastic plate, so that the damage of the inner wall of a concrete pipe caused by impacting is avoided; the inner end face of the lifting hook is also provided with the elastic plate, so that the end face of the concrete pipe is not damaged by impacting; a joint between the upper end face and the inner end face of the lifting hook transverse part is in smooth transition, so that the damage of the concrete pipe caused by impacting when the lifting hook enters the concrete pipe is further avoided.

Description

technical field [0001] The invention relates to a hook used for hoisting concrete pipes and belongs to the technical field of pipe hoisting. Background technique [0002] Prestressed steel cylinder concrete pipe (referred to as PCCP) is a new type of pipe material developed in China in the past ten years. The pipe material is a composite pipe with high strength, high permeability and high sealing performance. Made of raw and auxiliary materials such as rubber sealing rings. The pipe material not only combines the advantages of ordinary prestressed concrete pipes and steel pipes, but is also especially suitable for large-diameter, high-pressure, high-covered soil and engineering environments. Prestressed concrete pipe (abbreviated as PCCP) refers to a pipe made by winding a hoop prestressed steel wire on the outside of a concrete pipe core with a steel cylinder and making a cement mortar protective layer. Since the length of the PCCP pipe in the national standard is 5m or ...

AI Technical Summary

Problems solved by technology

Since the length of the PCCP pipe in the national standard is 5m or 6m, the production of the PCCP pipe is generally stacked horizontally. During transportation, a safe, simple, and low-energy consumption method is required for lifting and transporting the horizontally stacked PCCP pipes. The special spreader, in which the hook is a part in direct contact with the concrete pipe, after it enters the concrete pipe and holds up the concrete pipe, often causes damage to the concrete pipe due to the collision between the two, and also causes damage to the hook. damage

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