Tower crane over-limit overturn-preventing device

Abstract

The invention provides a tower crane over-limit overturn-preventing device. The tower crane over-limit overturn-preventing device comprises a pendant, a base, an amplifying mechanism and a monitoringswitch, wherein the amplifying mechanism and the monitoring switch are arranged on the base, the base is arranged on a tower crane and inclines along with the tower crane, the pendant is connected with the amplifying mechanism, the direction of the pendant is always the same as the gravity direction, relative motion between the base and the pendant is amplified by moving through the amplifying mechanism, the monitoring switch is touched through an executing mechanism in the amplifying mechanism, and overrun early warning is achieved through the monitoring switch. According to the tower crane over-limit overturn-preventing device, the perpendicularity deviation of a tower body is detected by using the relative movement between the base and the pendant, the problem that a moment limiter cannot detect the tower body inclination caused by foundation settlement, bolt looseness and mechanism abrasion is solved, the shortcoming of a traditional moment limiter is overcome, the tower crane over-limit overturn-preventing device can effectively detect the inclination of the upper part and the lower part of the tower crane, so that the inclination of the tower crane can be comprehensively detected.

Description

technical field [0001] The invention relates to the technical field of tower cranes, in particular to a tower crane overrunning anti-overturning device. Background technique [0002] For the verticality detection of the tower crane, the commonly used technical means in the prior art is to use a moment limiter to detect the moment the tower crane bears, and to give an early warning in time to prevent the tower crane from overturning accidents caused by the verticality exceeding the limit. Since the detection object of the moment limiter is the metal deformation of the upper part of the tower crane (that is, the part above the boom), the moment limiter cannot effectively detect the following situations. [0003] (1) When the foundation of the tower crane has uneven settlement, the tower crane will tilt towards the side with the largest settlement. When the lifting arm moves objects on the inclined side, the tower crane will cause an increase in moment due to the deviation of ...

AI Technical Summary

Problems solved by technology

When the lifting arm transfers objects on the inclined side, the tower crane will cause the moment to increase due to the deviation of the verticality of the center point of the tower due to the inclination

[0004] (2) The connecting bolts of the standard section of the tower crane are loose, and when the tower crane lifts objects in the opposite direction of the loose bolts, the tower crane will have a serious tilt and cause the moment load to exceed the standard

[0005] (3) Some mechanisms of the tower crane that determine the deviation of the verticality of the tower crane are worn out, causing the verticality of the tower crane to seriously exceed the standard when the tower crane is hoisting objects

[0006] Since the traditional moment limiter cannot be effectively detected in the above three situations, and the above situations also have potential safety hazards leading to the overturning of the tower crane, it is very necessary to effectively detect them

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