Portal frame for lifting and transporting precast concrete member

Abstract

The invention relates to the technical field of building construction, in particular to a portal frame for lifting and transporting a precast concrete member. The portal frame for lifting and transporting the precast concrete member comprises two rail seats and a movable seat, the two rail seats are symmetrically arranged on the two sides, supporting seats are slidably arranged at the upper ends of the two rail seats correspondingly. Through a movable wheel connected with the movable seat, when the portal frame is lifted and transported, a buffer effect is achieved, the service life of a hoisting assembly is prevented from being affected when an object is heavier and large stress is suddenly brought to a device body; the contact frequency of a cam of the movable seat with a power piston is different, the pressure intensity change of gas pushed to a control piston in a detection groove is detected; when the rotation frequency of the movable wheel is too high, and exhaust of an L-shaped vent groove of a guide rod cannot be effectively exhausted, the control piston makes contact with a control button, emergency equipment is started, a lifting chain in the section is limited through a limiting needle, continuous movement is prevented, and use safety is improved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a portal frame for hoisting prefabricated concrete components. Background technique [0002] Precast concrete Gu Mingsiyi is to make concrete into a specific shape in advance, and then transfer it to the construction area to improve construction efficiency and progress. In the prior art, lifting gantry is often used when transferring precast concrete to transportation equipment The hoisting gantry is to lift the precast concrete through the lifting chain and then transfer it. While the lifting chain is driven by the motor, as the service life increases or improper maintenance, the motor shaft may slip, resulting in rapid precast concrete. The whereabouts will bring great construction safety hazards to construction personnel and equipment. Contents of the invention [0003] The object of the present invention is to provide a door frame for hoisting prefabricated c...

AI Technical Summary

Problems solved by technology

[0002] Precast concrete Gu Mingsiyi is to make the concrete into a specific shape in advance, and then transfer it to the construction area to improve the construction efficiency and progress. In the prior art, the lifting gantry is often used when transferring the precast concrete to the transportation equipment The hoisting gantry is to lift the precast concrete through the lifting chain and then transfer it. While the lifting chain is driven by the motor, as the service life increases or improper maintenance, the motor shaft may slip, resulting in rapid precast concrete. The whereabouts of the construction personnel and equipment will bring greater construction safety hazards

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