Movable-type crane support unbalance early-warning device

Abstract

The invention discloses a movable-type crane support unbalance early-warning device. The movable-type crane support unbalance early-warning device comprises two unbalance trigger units, a connection flexible pipe and an acousto-optic warning device. Hooks of the unbalance trigger units are arranged at the top end of an adjustment frame, the bottom of the adjustment frame is provided with screw holes, adjustment screws are screwed in the screw holes at the bottom end of the adjustment frame, tail ends of the adjustment screws are movably connected to the top ends of transparent containers, the adjustment screws are screwed in locking nuts, adjustable contact pins are respectively arranged at the top ends of the transparent containers and stretch into the transparent containers, the top ends of the transparent containers are provided with through holes and the bottom ends of the transparent containers are provided with communication openings and electrodes, a conductive liquid is injected into the transparent containers, the connection flexible pipe connects the communication openings of the transparent containers of the two unbalance trigger units, and an input end of the acousto-optic warning device is connected respectively to the adjustable contact pins and the electrodes of the two unbalance trigger units. The movable-type crane support unbalance early-warning device can give effective and accurate early warning in movable-type crane operation, prevents rolling-over accident caused by ground pits produced by pressure, and guarantees reliable and safe operation of a movable-type crane.

Description

technical field [0001] The invention relates to an early warning device for unbalanced support of a mobile crane. Background technique [0002] Mobile cranes have the characteristics of maneuverability, flexibility and convenience for lifting operations, so they are widely used in lifting operations. Generally, mobile cranes have loads of tens of tons to hundreds of tons, or even thousand-ton super-power cranes, usually mobile The four outriggers at the front and rear of the mobile crane can be lifted to carry out the lifting operation; while the mobile crane is widely used, there are also certain unsafe factors, and safety accidents are frequent, mainly when the mobile crane is overloaded and loses stability and then overturns. It is also partly caused by the loss of balance of the ground support of the mobile crane; in order to avoid accidents, the general crane is equipped with a moment limiter, a limit position limiter for lifting, an amplitude indicator, a spirit level,...

AI Technical Summary

Problems solved by technology

[0002] Mobile cranes are characterized by maneuverability, flexibility, and convenience for lifting operations, so they are widely used in lifting operations. Generally, mobile cranes have a load of tens of tons to hundreds of tons, or even a thousand-ton ultra-high-power crane. The four outriggers at the front and back of the mobile crane can carry out the lifting operation; while the mobile crane is widely used, there are also certain unsafe factors, and safety accidents are frequent, mainly because the mobile crane is overloaded and loses stability. Some of the reasons are caused by the loss of balance of the ground support of the mobile crane; in order to avoid accidents, the general crane is equipped with a moment limiter, a rise limit position limiter, an amplitude indicator, a level, and a device to prevent the arm from tilting back. Outrigger retraction locking device, rotary positioning device, reverse alarm device and other safety devices, some of these safety devices are costly and complicated to install, and some of them do not play a good early warning role; for unbalanced overturning accidents, usually rely on the driver It is necessary to adjust the support of the outriggers of the mobile crane through visual analysis according to the softness and supportability of the ground to avoid the occurrence of tipping accidents after ground depression. Therefore, there are certain uncertain factors only relying on operating experience , affecting the reliable and safe operation of mobile cranes

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