Tower crane capable of effectively relieving failure of moment limiter

Abstract

The invention discloses a tower crane capable of effectively relieving the failure of a moment limiter. The tower crane comprises a moment limiter body, a bottom rod, a top rod and a bottom frame, wherein the bottom end of the moment limiter body is connected with signal transmission lines, and the number of the signal transmission lines is two; and the bottom frame, a protective sleeve ring and the bottom rod are sequentially arranged on one side of the moment limiter body from top to bottom, and the top rod is arranged at the end, far away from the moment limiter body, of the bottom frame. According to the tower crane capable of effectively relieving the failure of the moment limiter, the situation that a switch is damaged due to over-large impact force can be avoided; meanwhile, the toprod can be detached, and therefore the situation that the angle of the top rod is deviated due to impact in the transportation process can be prevented; and magnetic rings are arranged, and thereforethe situation that the working of the moment limiter body is influenced by the external magnetic field can be avoided, the phenomenon that the moment limiter loses efficacy due to the influence of the magnetic field is avoided, and the practicability of the tower crane is improved.

Description

technical field [0001] The invention relates to the technical field of torque limiters, in particular to a tower lifting device that can effectively reduce the failure of the torque limiter. Background technique [0002] Among the safety protection devices of tower cranes, the torque limiter is the most important protection device. If it fails and loses its function, the tower crane will lose its important over-torque protection function. When the tower crane is in use, the torque exceeds the standard, which will cause the tower crane to overturn, arm folding and other major property losses and personal casualties. Therefore, it is very necessary to ensure the effective integrity of the moment limiter, and the moment limiter is actually a mechanical deformation amplifier, which converts the small deformation of the chord at the top of the tower into a larger deformation between the bow-shaped steel plates, When the switch installed on the bow plate is pressed, the controlle...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a tower lifting device that can effectively reduce the failure of the moment limiter, so as to solve the problem that the traditional moment limiter proposed in the background technology often fails when the force of the ejector rod is too large. The collision of the ejector rod during the process may also cause the ejector rod to fail

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