SU807582A1 - Marine floating crane with flexible guy - Google Patents

Description

1,0 h, -. 5Д

, 9V /, d

where LI is the length of the cargo strol, measured from the rear of the building O to the mounting of the polysnast blocks of the main iodoem on her suit, m; (f) —even with the boom of the boom, intentionally relative to the axis of its rotation in the position of the extreme deviation of the floating crane after the load is broken

Floating crane works as follows.

When the tilting loads of the working state are affected by the Ilavkran (rolling and wind without breaking the load), the characteristics of Ilavkraia, chosen according to the safety ratio, ensure the relative suitability of the cargo boom 2 and the frame 5, which fluctuate together as a single rigid whole, thus creating normal operating conditions and maintenance of a floating crane in open sea waters.

When the maximum overturning loads of the limiting state are exposed to the floating crane (breakage or dumping of cargo, rolling, squall attack), a relative movement of the cargo boom 2 and the frame 5, resulting in the elastic impact of the cargo boom 2 with the stops 7 of the frame 5 with the boom pulley cables 3, occurs.

Upper limit of safety ratio Q, 2

The NOSTIE 5.0 is chosen from the DBL,

the equality of the loss of the kinetic energy of the relative motion of the boom 2, the potential energy of the deformation of the metal structures and the boom polyspast 3 of the upper structure, which perceive the elastic impact.

Due to this, the absence of residual deformations and the integrity of all elements of the floating crane are ensured with an extremely unfavorable combination of all categories of overloading loads that act on the floating crane when it is used in open sea waters.

Thus, the proposed design of a floating sea crane allows to drastically reduce the main dimensions of the floating base and neutralize the effect of inertial tipping loads by using} and the potential energy reserves of the vibrating elastic crane - boom system and the device of the boom and frame shell strikes. The design allows for the resultant overturning moment M over the boom moment M (condition, -)) and the emergence of orthogonal relative oscillations (jumps) of the cargo boom, the safety of which is ensured by the reduced edge ratio and design.

Claims (2)

1. A sea floating flexible-fit crane containing a floating base with a floating boom installed on a non-rotating upper structure and a cargo boom secured with a carcass hinges and equipped with a polyspast departure mechanism, characterized in that in order to reduce the size and metal intensity of the edge, the boom is installed with the possibility of free-jump, while respecting the ratio: GLi . 5.0, 1.0 DBL where G is the load capacity of the crane; D - the displacement of the crane without load on the boom; B - the width of the floating base; L, is the length of the boom; /, d - the length of the shoulder weight of the cargo arrows. 2. A crane according to claim 1. characterized in that as the lower limit of the ratio increases to 3.0, it is equipped with a device for damping the elastic collisions of the boom and frame. Sources of information taken into account in the examination 1. Vinogradov S.S. and others. Sea floating land “Bogatyr. “Shipbuilding Le 4, 1973, p. 9-16 (prototype).