CN201433064Y

CN201433064Y - Lifting mechanism for a multiple-lifting-lug hoisting machine

Info

Publication number: CN201433064Y
Application number: CN2009200152244U
Authority: CN
Inventors: 徐宏伟; 徐洪泽; 苏冬
Original assignee: Dalian Huarui Co Ltd
Current assignee: Dalian Huarui Co Ltd
Priority date: 2009-07-10
Filing date: 2009-07-10
Publication date: 2010-03-31
Anticipated expiration: 2019-07-10

Abstract

The present utility model relates to a lifting mechanism for a multiple-lifting-lug hoisting machine, the lifting mechanism adopts a duplex wound roll, wire ropes, multiple layer binding, and symmetrical rope giving mode and adopts a mode that lift hook connecting components are respectively hinged or fixedly connected with a corresponding lift hook group through a pin roll; the lifting mechanismhas a novel style structure and solves a series of problems that the deflection angle of the rope of a superduty wide-span hoisting machine is not easy to assure, horizontal binding distance of a wirerope is too long, efficiency of the mechanism is too low, and the mechanism is easy to cause situations of self-locking, different lifting-lug, big difficulty in construction and the like, and the lifting mechanism having characteristics of safety, reliability and strong practicability is suitable for multiple-lifting-lug hoisting machines of a ten-thousand-ton level, especially suitable for multiple-lifting-lug hoisting machines for sectional joint hoisting on a marine drilling platform.

Description

A kind of hoisting mechanism of multi-lifting-point joint crane

Technical field

The utility model relates to the handling machinery industry, relates in particular to a kind of hoisting mechanism of multi-lifting-point joint crane of ton super large hoisting capacity.

Background technology

Along with the proposition of domestic " marine drilling platform segmentation butt joint, integral hoisting " theory in recent years, need supporting hoisting crane and finish the lifting of this ton equipment of drilling platform, the hoisting capacity of comparing this hoisting crane with conventional hoist has increased an order of magnitude, can reach 20,000 tons even bigger, hoisting crane span and lifting altitude all reach more than 100 meter, in order to reduce the stability that singly hooks weight and improve lifting as far as possible, generally adopt superduty hoisting scheme.This process program needs many cover hoisting mechanisms to unite lifting, and for alleviating the weight of girder upper-part, winch is usually placed in girder and strides end.For steel rope and the angle between reel and the pulley that guarantees multiple wraps satisfies the requirement of design regulation (≤1.7 °), and avoid interfering mutually between the steel rope, the winch steel rope is restricted down to the span opposite side after reel one brings out rope, as shown in Figure 1.The crane hoisting mechanism of present domestic this pattern, in Chinese patent CN101104501 " double main bear multiple hanging point crane ", CN101085668 " multiple hanging points crane hoisting wire rope space interference-resistant layout " and CN101100267 " a kind of hoisting device for loop wheel machine ", all have openly, but all have following technical matters without exception:

1. the simply connected pattern causes single wire rope long, reaches more than 4800 meter, and cost is too high, and steel rope installation difficulty is big;

2. need arrange on girder that a large amount of dragging rollers prevents that the steel rope downwarp is excessive, complex structure;

3. the suspension centre of single group hoisting mechanism can not hoist synchronously, and electronic synchronizer gear need be set, and also needs the high harmony of electric system simultaneously;

4. the pulley multiplying power is excessive, and the driving efficiency that hoists is low, and degradation of energy is more, is easy to generate self-locking;

5. rope causes relative girders such as hoisting mechanism and leading sheave to rotate to an angle under simply connected reel and the offside span, could guarantee the requirement of deflection angle of rope like this, brings very large inconvenience to construction and installation.

The utility model content

At existing in prior technology the problems referred to above, the utility model is intended to disclose a kind of hoisting mechanism of multi-lifting-point joint crane, to improve the complete machine performance, reduces equipment cost, shortens the installation period of hoisting crane, improves lifting efficient, reduces the plant maintenance work capacity.

Technical solution of the present utility model is achieved in that

A kind of hoisting mechanism of multi-lifting-point joint crane comprises the above hoisting mechanism of the cover of 2 on the every girder, it is characterized in that:

For every cover hoisting mechanism, comprise that the centre adds the double crosslinking drum group of division board, two steel ropes and two last leading sheaves, and correspondence comprises that being positioned at the girder homonymy with described double crosslinking drum group strides the individual fixed pulley group of two following leading sheaves, (2n+1) of end and suspension hook group and 2n suspension hook attaching parts identical with fixed pulley group quantity, wherein, the integer of n=1～4;

Described two steel ropes are wrapped in the division board both sides of described double crosslinking drum group separately, and respectively through its separately last leading sheave, between described fixed pulley group and suspension hook group, adopt symmetrical winding form behind the leading sheave down, promptly in described every cover hoisting mechanism, two steel ropes are twined to middle symmetry by the fixed pulley group and the suspension hook group on both sides respectively, and its terminal is individually fixed on the equilibrium arm;

Described 2n suspension hook attaching parts is hinged with cooresponding suspension hook group or captive joint by bearing pin respectively;

Described hoisting mechanism the girder homonymy stride the double crosslinking drum group of end cooresponding to it on section between the leading sheave, be arranged in respectively on the different vertical dimensions.

As a kind of modification of above-mentioned suspension hook attaching parts, the individual suspension hook group of (2n+1) of described every cover hoisting mechanism and cooresponding 2n suspension hook attaching parts thereof are linked to be a single-piece movable pulley equalizing bar.

Under the big situation of sling height, as a kind of preferred version, described two steel ropes can adopt the multiple wraps pattern to be wrapped in the division board both sides of described double crosslinking drum group separately.

Compared with prior art, the utlity model has following significant advantage:

(1) reduced the coiling length of single wire rope greatly, cost reduces, and the steel rope installation period shortens;

(2) net synchronization capability between the suspension hook group of every cover hoisting mechanism improves greatly;

(3) the pulley multiplying power reduces, and the driving efficiency of winding system obviously improves, and avoids mechanism's self-locking;

(4) difficulty of construction and operating cost reduce greatly.

In a word, the utility model adopts double crosslinking drum, steel rope multiple wraps and symmetry rope pattern down, novel structure, solved that superduty large span crane rope drift angle is not easy to guarantee and the steel rope level twines that distance is long, mechanism efficiency is low excessively, mechanism is easy to generate a series of problems such as self-locking, suspension centre is asynchronous, difficulty of construction is big, have safe and reliable, practical characteristics, can avoid great potential safety hazard, be applicable on the ton super large hoisting capacity hoisting crane multi-suspension-centres crane of lifting usefulness when being particularly useful for marine drilling platform segmentation butt joint.

Description of drawings

Fig. 1 is the typical structure scheme drawing of restricting under the steel rope offside span in the prior art;

Fig. 2 is the structural representation of embodiment of the present utility model;

Fig. 3 is the birds-eye view of Fig. 2;

Fig. 4 is the enlarged drawing of the cover hoisting mechanism of one among Fig. 2 (IV);

Fig. 5 is that example shows that steel rope duplex, multilayer, symmetrical expression twine the scheme drawing of pattern with hoisting mechanism (IV);

Fig. 6 is the C-C section-drawing among Fig. 4;

Fig. 7 is suspension hook attaching parts scheme drawing I;

Fig. 8 is suspension hook attaching parts scheme drawing II;

Fig. 9 is the structural representation of the two ends suspension hook group of every cover hoisting mechanism;

Figure 10 is the structural representation of the middle suspension hook group of every cover hoisting mechanism;

Figure 11 is a double crosslinking drum group structural representation;

Figure 12 is the structural representation that the suspension hook attaching parts adopts the lifting mechanism of another kind of modification structures;

Figure 13 is the enlarged drawing of the cover hoisting mechanism of one among Figure 12 (IV);

Figure 14 is the annexation enlarged drawing of suspension hook attaching parts and suspension hook group.

The specific embodiment

Now in conjunction with the accompanying drawings, the utility model is further described specifically:

Described hoisting mechanism of multi-lifting-point joint crane is used for 20,000 tons of super large weight hoisting cranes, as Fig. 2, shown in Figure 3, arranges 6 cover hoisting mechanisms on the every girder, respectively with Roman number I, and II, III, IV, V, VI represents;

Every cover hoisting mechanism as shown in Figure 4, adds the double crosslinking drum group 14 of division board 20 in the middle of including, as shown in figure 11, also comprise two

steel ropes

10,11, be positioned at the girder homonymy with described double crosslinking drum group and stride two of end and go up leading

sheaves

12,13, two following leading

sheaves

7,9, three

fixed pulley groups

4,5,6 and three cooresponding

suspension hook groups

1,2,3, respectively as Fig. 9, shown in Figure 10, and 2 suspension

hook attaching partss

15,16, respectively as shown in Figure 7 and Figure 8;

Described two

steel ropes

10,11 separately multiple wraps on division board 20 both sides of described double crosslinking drum group 14, and respectively through its last leading sheave 12 separately, 13, descend leading

sheave

7,9 backs in described

fixed pulley group

4,5,6 and

suspension hook group

1,2, adopt symmetrical winding form between 3, i.e. two

steel ropes

10,11 are twined to the fixed pulley group 5 and suspension hook group 2 symmetries of centre by the

fixed pulley group

4,6 and the suspension hook group 1,3 on both sides respectively, and its terminal is individually fixed on the equilibrium arm 8, as shown in Figure 5;

Described 2 suspension

hook attaching partss

15,16, as shown in Figure 7 and Figure 8, it is hinged by stub axle 18 and cooresponding

suspension hook group

1,2,3 respectively, or respectively simultaneously by stub axle 18 and ear's bearing pin 19 and cooresponding

suspension hook group

1,2,3 captive joints, as shown in figure 14; Its concrete pattern that connects adopts grafting, as shown in Figure 6.

For big elevating height, organize the big multiplying power lifting mechanism of suspension hook group more, its hoisting mechanism adopts above-mentioned duplex multiple wraps reel, double-steel wire rope to stride the layout pattern of restricting under the end at the homonymy of girder, avoided in the simply connected pattern steel rope one to bring out after the rope span offside rope down, as shown in Figure 1, reel group and the excessive problem of last leading sheave spacing; Under the condition that guarantees deflection angle of rope, double crosslinking drum pattern and simply connected reel pattern relatively greatly reduce the multiplying power of assembly pulley, the lifting mechanism driving efficiency has improved 20%, and the length of single wire rope is reduced to 2200m by 4800m, shortens the steel rope installation period in the time of cost-cutting greatly.Double crosslinking drum and go up leading sheave and keep the layout of a determining deviation to make the easier assurance of deflection angle of rope, hoisting mechanism and leading sheave group etc. need not the installation that rotates to an angle of relative girder, greatly reduce difficulty of construction.

On the other hand, steel rope twines pattern by the both sides assembly pulley to the symmetry of intermediate pulley group, guaranteed hoisting synchronously between a plurality of suspension hook groups of single cover hoisting mechanism: during the independent lifting operation of a cover hoisting mechanism, after suspension

hook attaching parts

15,16 couples together by bearing pin, lift by crane under the winding pattern of symmetrical lay winding wire ropes,

suspension hook group

1,2,2,3 can hoist synchronously, avoids adopting other measure as electronic synchronizer gear etc. is set, simplify mechanism, improved the reliability of complete machine work.

And special many suspension hooks group connecting device has solved nonsynchronous problem of many suspension centres hyperstatic structure and each suspension centre:

When zero load is lifted by crane, for the suspension hook group that guarantees every group of hoisting mechanism synchronously, all suspension hook groups by ear's bearing pin 19 and 18 combineds action of stub axle, are connected into rigid body with suspension

hook attaching parts

15,16;

And when fully loaded lifting or the suspension centre of the weight of every group of hoisting mechanism lifting not on same horizontal linear the time, discharge the ear's bearing pin 19 between suspension hook group and the suspension

hook attaching parts

15,16, and only realize hinged between suspension hook groups and the suspension hook attaching parts, thereby the degree of freedom of assurance suspension hook group vertical direction by stub axle 18.

As a kind of modification of such scheme, described 3

suspension hook groups

1,2,3 and cooresponding 2 suspension

hook attaching partss

15,16 thereof form and are linked to be a single-piece movable pulley equalizing bar 17, as Figure 12 and shown in Figure 13.

The above; it only is the preferable specific embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection domain of the present utility model.

Claims

1, a kind of hoisting mechanism of multi-lifting-point joint crane comprises the above hoisting mechanism of the cover of 2 on the every girder, it is characterized in that:

Described 2n suspension hook attaching parts forms hinged by bearing pin with cooresponding suspension hook group respectively or captives joint pattern;

2, hoisting mechanism of multi-lifting-point joint crane according to claim 1 is characterized in that:

The individual suspension hook group of (2n+1) of described every cover hoisting mechanism and cooresponding 2n suspension hook attaching parts thereof are linked to be a single-piece movable pulley equalizing bar.

3, hoisting mechanism of multi-lifting-point joint crane according to claim 1 and 2 is characterized in that:

Described two steel ropes adopt the multiple wraps pattern to be wrapped in the division board both sides of described double crosslinking drum group separately.