Decoupling control method, equipment, system and construction machinery of load-releasing device

Abstract

The invention discloses an unhooking control method, equipment and system of a loaded lowering device and engineering machinery. The loaded lowering device comprises a weight, a hooking mechanism, an unlocking mechanism, an accelerating mechanism and an unlocking mechanism triggering mechanism. The method comprises the following steps: receiving an engineering machinery state parameter for representing the working state of the engineering machinery; acquiring a pull time-domain function, corresponding to the engineering machinery state parameter, of the hooking mechanism according to the engineering machinery state parameter and an engineering machinery state parameter-hooking mechanism pull time-domain function corresponding relation table, wherein the pull time-domain function of the hooking mechanism represents a time-dependent pull value of the weight pulled by the hooking mechanism; controlling the acceleration of downward movement of the weight below the acceleration mechanism according to the pull time-domain function of the hooking mechanism; and triggering the unhooking mechanism to unhook the weight when the acceleration of downward movement of the weight reaches a predetermined value. According to the invention, the impact to the engineering machinery can be reduced, for instance, the structural rebound of the engineering machinery can be alleviated.

Description

technical field [0001] The present invention relates to construction machinery, in particular, to a decoupling control method, equipment, system and construction machinery of a loading and unloading device. Background technique [0002] Large-scale impact machines (such as cranes) rely on high-altitude release loads to impact the ground, and the sudden unloading of high-altitude heavy objects (or working weights) is a difficult problem in the design of impact machines. Aiming at the problem of crane unloading shock, a scheme is firstly designed, which includes three types of switch-controlled automation equipment: hydraulic decoupling, free-fall hoist and non-decoupling oil cylinder. [0003] However, the inventor of the present invention found that the hydraulic decoupling device is composed of a decoupling mechanism and an oil cylinder, and the switching of the oil circuit is controlled by the switch of the electromagnetic reversing valve, and the hydraulic pressure in the...

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Problems solved by technology

[0007] Aiming at the problems existing in the prior art that the structure of the construction machinery rebounds during the heavy-duty high-speed lowering of the construction machinery, which causes a great impact on the construction machinery, the present invention provides a decoupling control method for the on-load lowering device of the construction machinery. The loading and unloading device includes a weight, a hook mechanism, a decoupling mechanism, an acceleration mechanism, and a decoupling mechanism triggering mechanism. The method includes: receiving a construction machinery state parameter indicating the construction machinery working state; Parameter-Hook Mechanism Tension Time-Domain Function Correspondence Table Obtain the hook mechanism tension time-domain function corresponding to the state parameters of the construction machinery, wherein the hook mechanism tension time-domain function represents the time-varying time-domain function of the hook mechanism pulling the weight The pulling force value of the object; according to the time domain function of the pulling force of the hook mechanism, the acceleration of the downward movement of the weight is controlled by the acceleration mechanism; and when the acceleration of the downward movement of the weight reaches a predetermined value, the unhook mechanism is triggered to The weight is unhooked

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