Crane cart walking emergency safety braking device and method

Abstract

The invention discloses a crane cart walking emergency safety braking device. The crane cart walking emergency safety braking device comprises a first brake, a second brake, a power distribution cabinet and a manual controller, a power distribution cabinet used for carrying out frequency conversion adjustment on a motor of a pusher of the second brake, and a manual controller electrically connected to the power distribution cabinet, wherein the first brake and the second brake are used for controlling the braking condition of a crane; the manual controller is used for adjusting a motor of thesecond brake through the power distribution cabinet according to an operation signal from a user for the manual controller when the gear of the crane is in a driving gear, so that the braking condition of the crane is adjustable; ad when the gear of the crane is in a parking gear, the manual controller cannot control the second brake. The crane cart walking emergency safety braking device providedby the invention can avoid and reduce potential safety hazards.

Description

technical field [0001] The invention relates to the field of safety management of cranes, in particular to an emergency safety brake device and method for traveling a crane cart. Background technique [0002] At present, the general-purpose crane trolley travel control system often uses electromagnetic or electro-hydraulic control system and supporting equipment to realize the braking and positioning of the crane travel position. Mechanical braking of the crane travel drive shaft to realize the parking function of the crane. Since the electromagnetic suction force or the output thrust of the electro-hydraulic pusher cannot be continuously adjusted (0 or 1), the braking torque applied by the braking device to the driving shaft of the crane during braking is constant, and adjustable and variable braking cannot be realized. torque, resulting in a lot of vibration when parking, especially when lifting and handling large-tonnage heavy objects. [0003] The loading of the heatin...

AI Technical Summary

Problems solved by technology

[0004] Phenomenon 1: In the same operation, multiple cranes are selected for operation across the design, and at the same time they are used as backups for each other. However, in actual work, in order to realize the rapid and accurate positioning and parking of the cranes, reduce the operation time of the unit product, and improve the operation efficiency, the crane workers are in operation. Reverse driving (commonly known as returning the car) is often used to pre-control the crane and lift heavy objects, so as to realize positioning parking (that is, when the crane is moving forward, the braking force generated by the rotation of the driving motor of the crane is used to brake and position). This operation method similar to emergency braking artificially increases the damage of the electric control and braking machinery of the crane travel braking system. Like the emergency braking system of a truck, frequent use of emergency braking mode will affect the overall service life and safety of the crane. have a great impact

[0005] Phenomenon 2: When the same operation crosses sections, there is a mandatory requirement for the cranes in the maintenance section to stop the power supply of the contact line before they can be overhauled. In the case of entering the maintenance section (marked line without power supply state)

A crane that does not brake in time hits a crane in an overhaul state, which will cause equipment damage or personal injury or death in the overhaul state.

[0006] Phenomenon 3: During the loading and unloading process of the crane, there is a sudden power failure or a sudden power failure at the marking line. Because the crane brake is too loose (manually adjusted), the power failure and the reverse brake cannot be applied, causing the crane to slide and hit the adjacent crane or other structures. , resulting in equipment damage or personal injury or death

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