CN1657395A - Method for preventing hanging beam and steel plate from swinging when electromagnetic hanging beam crane starts and brakes - Google Patents

Abstract

A method for preventing the swinging of pylon and steel plate when a pylon-type electromagnetic hoister is started or stopped features that two steel cables used between the bogie and hook of lifting unit are respectively wound on pulleys to a dual-reverse-splayed system to effectively provent said swinging.

Description

Method for preventing hanging beam and steel plate from swinging when electromagnetic hanging beam crane starts and brakes

technical field

The invention relates to an anti-swing method for lifting heavy objects by a crane, in particular to an anti-swing method for hanging a beam and a steel plate when an electromagnetic hanging beam crane starts and brakes.

Background technique

Electromagnetic hanging beam cranes are necessary steel plate and slab loading and unloading equipment for steel mills and ports. At present, the length of the steel plate lifted by the existing electromagnetic hanging beam crane in the steel plant is generally less than 18m. With the continuous demand of the manufacturing industry and the continuous development of rolling technology, steel plants, ports and manufacturing industries have the demand for handling ultra-long steel plates. It will inevitably increase rapidly, so an electromagnetic hanging beam crane capable of lifting long steel plates is required. To manufacture this electromagnetic hanging beam crane, it is necessary to solve the swinging problem of the hanging beam and the long steel plate when starting and braking. Germany's DSD company and China's Taiyuan Heavy Industry have cooperated to produce an electromagnetic hanging beam crane for lifting long steel plates for Baosteel. This type of crane adds a retractable rigid sleeve between the trolley and the transitional hanging beam to achieve anti-sway protection. effect. The anti-swing method using rigid sleeves is more commonly used in lifting equipment. Its advantages are high alignment accuracy and can meet the requirements of high productivity, but the disadvantage is that due to the heavy weight of the rigid sleeve itself, it increases the lifting capacity. The calculated load of the mechanism increases the power of the motor and increases the weight of the structure, which leads to an increase in the wheel pressure of the whole machine and increases the cost of the factory building. In addition, the processing cost of the rigid guide cylinder is relatively high, and the maintenance cost also increases accordingly.

Contents of the invention

According to the above, the object of the present invention is to provide a method for preventing the hanging beam and the steel plate from swinging when the electromagnetic hanging beam crane starts and brakes. Adopting the anti-swing method can not only solve the anti-swing problem of the hanging beam and the steel plate, obtain higher productivity, but also make the anti-swing system simple in structure, light in weight and low in manufacturing cost.

According to the above, the present invention provides a method for preventing the swing of the hanging beam and the steel plate when the electromagnetic hanging beam crane is started and braked. The pulleys on the hook are wound and connected to form a double "upside-down" shaped wire rope anti-sway winding system. The winding steps are: a two-strand rope composed of one of the two wire ropes is wound from the drum 7 on the trolley. Go out, go directly down and bypass the two movable pulleys 10 installed on the hook on the left side below, and then go up from the inside of the two fixed pulleys 9 installed on the trolley on the left side above, go out from the outside, and finally go down A balance pulley 11 installed perpendicular to the two movable pulleys 10 on the left hook is connected to form an "inverted figure-eight" shape; When the reel is wound out, first bypass the two transition pulleys 8 that are installed side by side with the reel 7 and play a guiding role, then go down and bypass the two movable pulleys 10 installed on the hook on the lower right side, and then install them upward from the upper right side. The inner side of the two fixed pulleys 9 on the trolley goes in and out, and finally connects downwards at a balance pulley 11 installed perpendicular to the two movable pulleys 10 on the right hook, forming another "inverted pulley". "Bazi" shape.

Adopting the method of the present invention can not only effectively prevent the whole vehicle, trolley and its hoisting and braking mechanism of the electromagnetic hanging beam crane from swinging back and forth and left and right of the hanging beam and the steel plate during the starting and braking process, and has higher productivity , and compared with the existing rigid sleeve anti-swing system, it has the characteristics of simple form, light weight, low cost, easy manufacture and maintenance, and greatly reduces the lifting load and the power of the lifting mechanism motor and the weight of the steel structure , thereby reducing equipment costs and factory building costs, and achieved obvious commercial effects.

Description of drawings

The utility model has 6 accompanying drawings.

Fig. 1 is the front view of the electromagnetic hanging beam crane;

Fig. 2 is a top view of the crane shown in Fig. 1;

Fig. 3 is a side view of the crane shown in Fig. 1;

Fig. 4 is the partial enlarged view of I among Fig. 2;

Fig. 5 is a partial enlarged view of II in Fig. 3;

Fig. 6 is a schematic diagram of the anti-sway winding form of the steel wire rope.

In the figure: 1-electrical equipment; 2-trolley; 3-trolley running mechanism; 4-bridge; 5-truss type hanging beam; 6-electric hoist; 7-drum; 8-transition pulley; 10-moving pulley; 11-balance pulley; 12-hook.

Detailed ways

Figures 1 to 3 show an example of the application of the double "inverted splayed" wire rope anti-sway winding system formed according to the method of the present invention to the hoisting mechanism of an electromagnetic hanging beam crane. This electromagnetic hanging beam crane is composed of six major parts: electrical equipment 1, trolley 2, cart operating mechanism 3, bridge frame 4, truss-type hanging beam 5, and electric hoist 6. There is a set of hoisting mechanisms on both sides of the trolley, and each set of hoisting mechanisms contains a double "inverted character" shaped wire rope anti-swing winding system. Figure 4 and Figure 5 respectively show the arrangement of the components of the wire rope anti-sway winding system on the trolley and the hook. It can be seen from Fig. 6 that a set of hoisting mechanism includes two steel wire ropes to form a structure of four ropes. From Fig. 6, it can be seen that the two strands of steel wire ropes on the left come directly down from the drum 7 and bypass the two movable pulleys 10 on the left below. , and then return to the top fixed pulley 9, the wire rope is wound in from the inside of the two fixed pulleys 9, wound out from the outside of the two fixed pulleys 9, and finally connected at the balance pulley 11, the advantage of doing this is to make " The form of inverted horoscope is more obvious, which makes the anti-swing effect of the wire rope more obvious, so this is a winding system of two ropes composed of a single wire rope. The winding form of the wire rope on the right side is basically consistent with the left side, except that two transition pulleys 8 for guiding are added. In Figure 6, the two rope systems composed of the left steel wire rope and the two rope systems composed of the right steel wire rope respectively form an "inverted figure-eight" shape. Such a double "inverted figure-eight" shaped steel wire rope anti-swing winding system can prevent The left and right swing of the hanging beam and the long steel plate can prevent it from swinging back and forth.

Claims (1)

1, a kind of method that prevents the starting of electromagnetic suspended beam hoisting crane and glancing impact drop in beam and steel plate swing, it is characterized in that, in lifting mechanism, utilize two steel ropes respectively be arranged on the dolly and suspension hook on each pulley twine to join and form two " fall the Eight characters " anti-sway winding system of shape steel rope, its winding step is as follows:

Two strands of forming by the steel cable in two steel ropes, lay out from the reel (7) that is positioned on the dolly, directly get off to walk around two movable pulleys (10) that install in the left side, below on suspension hook, the inboard that upwards is installed in two fixed pulleys (9) on the dolly then from the left side, top moves into, lay out from the outside, and finally on the suspension hook of left side, locate to join perpendicular to an equalizer pulley (11) of two movable pulleys (10) installation downwards, form " the Eight characters " shape;

Two strands of forming by another root steel rope in two steel ropes, lay out from the reel (7) that is positioned on the dolly, walk around earlier with reel (7) two the transition pulleys (8) that play the guiding role are installed side by side, walk around two movable pulleys (10) that install on the right side, below downwards on suspension hook, the inboard that upwards is installed in two fixed pulleys (9) on the dolly then from the right side, top moves into, lay out from the outside, and finally on the suspension hook of right side, locate to join perpendicular to an equalizer pulley (11) of two movable pulleys (10) installation downwards, form another herringbone.

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