SU1532528A1 - Hoisting device for assembling equipment - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to a lifting and transport machinery, in particular, to the construction of bridge cranes for lifting heavy loads. The purpose of the invention is to increase the load capacity and increase the height of the load lifting in a limited space. A lifting device for mounting equipment contains sets of beams located inside frames 1, lying in the span crane of an overhead crane supported on rails 2 in pairs and symmetrically another pair of frames 1, each pair of frames 1 in the lower part containing supporting beams 6 located along the axis the symmetry of the superstructure and under the ends of the distribution beams 8, on which the longitudinal beams 9 are supported, located along the axis of symmetry of the bridge crane, each of which carries on itself the cargo beams 10 with chain hoists, two bridges wound connected to each other by means of spacers with a common lifting device and the flexible connecting rods. 4 il.

Description

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I The invention relates to a lifting machinery industry, namely to devices of bridge cranes for lifting heavy loads,

 The purpose of the invention is to increase the load and increase the height of the load in a limited space.

Fig. 1 shows a device installed on the spans of bridge cranes, general view; on 1) 2 - the same plan; in fig. 3 - section A-A in FIG. Fig 4 shows the scheme of stocking of cargo hoists on a cargo beam.

A lifting device for mounting equipment consists of eight frames 1 supported on rails 2 of propelling beams 3, pairwise relative to the axis 4 of crane girders 5, each pair of frames 1 in the lower part of the structure is connected by two supporting beams 6 located along the span the longitudinal axis 7 of the span. Support beams 6 along their symmetry axis are connected by distribution beams 8, on which longitudinal beams 9 are supported, located along axis 7 of symmetry of span beams 3, each longitudinal beam 9 is connected by two cargo beams 10 arranged parallel to crane girders 5, symmetrically relative to axis 4 and a passage above the heels 2 by an amount greater than the deflection of the cargo beam 10 at its intersection with the rail 2 o

For the suspension of the system of cargo tackles 11 on the gangs of the girders 10, crossbars 12 are fixed,

The system of cargo tackles 11 consists of two tackles 13 connected through equalizing block 14. The fixed thread 15 is fixed on the extreme crossbar 12, the bypass block 16 is fixed to the other extreme crossbar 12, the cable 17 passes through the bypass block 18 fixed on the cargo beam 10, and the joint with winch 19 mounted on span- (beams 3.

The distance between the frames 1 is selected on the basis of the equality of the bending moments arising during the operation of the bridge crane with the use of the device and during the work with the passport mode.

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Freight 20 pods echen on cargo hoists 11 using slings 21 attached to pins 22.

The device works as follows.

Using a lifting mechanism (not shown), the frames 1, the support beams 6, the distribution beams 8 and the longitudinal beams 9 are mounted on the ground beams 3, the pre-block of the superstructure is lifted and installed, and the second one with the frames 1 is mounted on the crane beams 5 , supporting beams 6, distributing beams 8 and longitudinal beams 9, then install cargo beams 10 with crossbars 12 and fixed upper blocks of cargo polyspasts 13 and side blocks 16 and 18. After this, The stock of the rope 17 is attached to the mounted winch 19.

The load 20 is secured by slings 21 by pins 22 to the lower blocks of cargo hoists 13 and by means of winches 19 they lift the load to the required height.

The forces of the weight of the lifted load 20 are distributed successively through the system of beams 10; 9; AT; 6 and frames 1 on the span beams 3, so that the bending moments occurring in the areas of the supports 1 correspond to the bending moments arising when the bridge crane operates in the passport mode. At the same time, the weight of the lifted load exceeds the weight of the load when the crane operates according to the passport mode.

Claims (1)

Invention Formula A lifting device for the installation of equipment, containing two bridge cranes, supported through rails and a span structure and interconnected by means of struts with a common lifting device and flexible rods, characterized in that the purpose of increasing the load capacity and increasing the height of the load in a limited space , it is equipped with spaced structures in the span, with a peeing onto the rails with frames in which sets of beams are installed, each of which consists of support beams located along and symmetry of the superstructure, and distribution beams installed on them, on which longitudinal beams are fixed, located along the symmetry axis of the bridge cranes, each of which carries cargo beams with tackles, while each pair of frames is interconnected by supporting beams. Fie.2 J l d; b o 18 zz 0we.4