A tower crane jacking anti-falling control device

Abstract

The invention discloses a tower crane jacking anti-falling control device, which belongs to the technical field of tower cranes and comprises a climbing frame (1) and a step (6). The climbing frame includes an oil cylinder beam, a jacking oil cylinder, a jacking beam, and an oil cylinder beam Climbing claws (3) are installed on the top; the steps are installed on the outside of the standard section, and the climbing claws are suspension pawls, which are hingedly connected to the ear plate (2-1) welded on the cylinder beam through the pawl shaft (3-1). ), the distance between the center of the pawl shaft and the main chord of the standard section is less than the length of the suspension pawl; there is a fixing hole (6-1) in the middle of the step for supporting the support shaft (5-2) of the jacking beam, and the upper and lower Positioning slots (6-2) are provided at both ends; telescopic mechanisms are provided at both ends of the jacking beam. The climbing frame of the present invention does not need manual operation when stepping through the standard section. The jacking beam passes through the telescopic support shaft into the center hole of the standard section step, and uses the safety pin to position the telescopic support shaft, effectively preventing the oil cylinder from telescopic misoperation, safe and reliable high sex.

Description

technical field [0001] The invention relates to an anti-off control device, in particular to an anti-off control device for tower crane jacking, belonging to the technical field of tower cranes. Background technique [0002] According to statistics, tower crane accidents mostly occur during the installation and disassembly process, and the safety problems during jacking are particularly prominent. In existing designs, such as figure 1 and figure 2 As shown, the climbing frame 1 of the tower crane mainly includes the oil cylinder beam 2, the climbing claw 3, the jacking cylinder 4 and the jacking beam 5, and the climbing frame 1 is supported on the upper end surface of the step 6 of the main chord 7 of the standard section through the climbing claw 3 The upper and lower parts are connected to the jacking beam 5 through the jacking cylinder 4, and are supported in the circular groove of the step 6. The conversion support of the jacking beam between the up and down steps is...

AI Technical Summary

Problems solved by technology

This structural form has the following disadvantages: (1) During the climbing and descending process of the climbing frame, the climbing claw needs manual assistance when stepping through the standard joint, which poses a safety hazard

(2) During the jacking process, the climbing claws need to be manually rotated when the climbing claws pass through the steps, and the work intensity is high

Due to the limitation of the structure size of the crawler, the distance between the center of the crawler beam and the step is large, the crawler beam needs to bear a large eccentric torque, the crawler beam needs to be locally strengthened, and the structure is heavy

(3) The supporting pin shaft of the jacking beam is placed in the circular groove at the upper end of the step, and the Φ20mm lock pin is used to prevent it from falling out. The diameter of the anti-dropping pin is small. Once the misoperation of the oil receiving cylinder occurs, the jacking beam cannot be effectively locked. Safety and low reliability

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