RU2561177C2 - Mobile hoist for assembling, dismantling and rearranging overhead cranes - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: invention relates to hoisting machines and can be used in assembling, dismantling and rearranging overhead cranes in a completely assembled state. The hoist comprises a telescopic boom which is mounted by the internal section on the rotary platform of a mobile crane, and carriages of a hydraulic lift with a crossbeam move on the external section of the telescopic boom. The telescopic boom can also be mounted on the rotary platform in a vertical position.

EFFECT: achieving high mobility using a rack-mountable hoist to assemble, dismantle and rearrange cranes in a single pass, enabling use of low-capacity cranes when assembling overhead cranes before hoisting thereof in an assembly and high technological effectiveness of hoisting.

4 cl, 3 dwg

Description

The invention relates to hoisting devices and can be used during installation, dismantling and rearrangement of bridge cranes in a fully assembled state both in open workshops without a roof and closed workshops with a small height from crane tracks to the roof of a building.

A known design for mounting and dismantling bridge cranes in a fully assembled state, including tackles attached to mounting beams designed in the coating structures of the workshop (Giprometallurgmontazh “Installation of bridge cranes and cranes for cranes” Moscow, Stroyizdat 1990).

The disadvantage of this design is the great complexity and duration of work on the installation of mounting beams, hitching and stocking of assembly chain hoists, especially in existing workshops.

A known method of mounting bridge cranes in a fully assembled state, in which heavy-duty jib cranes are used and with a corresponding overhang in the absence of a building roof or through an installation opening in the roof, as well as with a closed building roof inside it at a sufficient height from the crane runways to the building roof ( “Installation of hoisting-and-transport mechanisms” L.M. Belyaev, Moscow, Stroyizdat 1975).

The disadvantage of the analogue is the need for heavy-duty cranes with an appropriate reach, the mounted bridge crane must be installed before the roofing device, the inability to be installed when the roof is closed in the absence of the required height between the crane bridge and the roof to provide a boom space and a lifting height.

A known design for the installation of bridge cranes, including mounting masts and tackles fixed to them, adopted as a prototype ("Rigging" NN Kichikhin, Moscow, Higher School "1979, p.149-152).

The disadvantage of the prototype is the great complexity, the complexity and duration of the installation and dismantling of the mounting masts, the need for their braces, the complexity of the process of lifting a bridge crane with the help of chain hoists mounted on the mounting masts, as well as the difficulty of transporting the mounting masts to the installation site.

The objective of the present invention is to reduce the complexity of installation and dismantling of bridge cranes, reducing the duration of installation work, increasing the safety of their implementation, improving working conditions.

The technical result of the present invention is to increase mobility when using a rack-mount elevator for mounting, disassembling and replacing cranes with places in one span, the possibility of using cranes of lower carrying capacity when assembling bridge cranes before lifting them assembled, increasing the manufacturability of lifting, the possibility of placing the mounting platform at any angle in plan, which is especially important in the conditions of existing production, reducing the complexity of installation, reducing the duration of installation work, improving of working conditions and improve the safety of their performance.

The technical result is achieved by the fact that the telescopic boom is fixed by the inner section on the turntable of the mobile crane, and on the outer section of the telescopic boom, the carriages of the hydraulic lift with traverse are moved.

The technical result is also achieved by the fact that the telescopic boom can be mounted on a turntable in a vertical position.

The technical result is also achieved by the fact that the carriages are interconnected by means of hydraulic cylinders with the possibility of stepwise movement (implying the following: the lower carriage is rigidly fixed to the telescopic boom, then the upper carriage, supported by the lower one, is pushed upward by, for example, hydraulic cylinders, then the upper carriage is rigidly fixed to telescopic boom, after which the lower carriage, resting on the upper one, is pulled up and fixed, after which the described cycle is repeated).

The technical result is also achieved by the fact that the outer section of the telescopic boom is equipped with a head with rollers for the chain hoist, which allows the use of a mobile hoist also as a jib crane with the tilted position of the telescopic boom.

The invention is illustrated in the drawing, where the figures show: side view of a mobile lift (Fig. 1), end view of a mobile lift (Fig. 2), general view of a mobile lift in a transport position based on a truck crane (Fig. 3).

In the figures, the positions indicated:

1. Head with pulleys for pulley block

2. The contour of the mounted crane

3. The carriage is top

4. Traverse

5. The axis of the hydraulic cylinder

6. Carriage stop

7. Lower carriage

8. Outside boom section

9. Holes for fingers attaching to the rotary platform of the crane

10. Carriage lock windows

11. Axis of the boom lift cylinder

12. Arrow

The proposed device operates as follows.

A mobile hoist for mounting, dismounting and moving bridge cranes is mounted on supports at the installation site so that the axis of the boom 12 is in a vertical position at the center of mass of the fully assembled bridge crane. The boom 12 is brought into a vertical position (for example, by means of a hydraulic cylinder) and is fixed with the head of the inner section resting on the turntable, which makes it possible to move the carriage of the upper 3 and the carriage of the lower 7 hydraulic jack along the outer section of the boom 12 within its height, with insufficient lifting height the second section of the boom 12 extends and, if necessary, the 3rd, 4th, etc.

After lifting the mounted bridge crane to the required height, the rotary platform is set in motion, the bridge crane is centered on the wheel slopes above the crane tracks and lowered to the design position, after which the retractable sections of the boom 12 are retracted, and the upper carriage 3 with traverse 4 and the lower carriage 7 are lowered into starting position before lifting. The boom 12 is folded into a transport position. A mobile hoist for mounting, dismantling and moving bridge cranes is removed from the supports and moves from the lifting site.

The operation of lifting a fully assembled bridge crane on temporary supports up to 5 meters high should be no more than 4-6 hours from the moment of installing a mobile hoist for installation, dismantling and rearrangement of bridge cranes at the installation site, this will allow for installation, dismantling or rearrangement overhead crane into the agreed technological "windows", which is especially important for the current production cycle and will significantly reduce the total installation time of the overhead crane.

The use of the invention allows to increase mobility when using a rack-mount elevator for mounting, dismantling and reversing bridge cranes in places in one span, makes it possible to use mobile cranes of lower carrying capacity when assembling bridge cranes before they are assembled, increases the manufacturability of the lift, makes it possible to place an assembly site under any angle in plan, which is especially important in the conditions of existing production.

Claims (4)

1. A mobile hoist for mounting, dismounting and moving bridge cranes, characterized in that the telescopic boom is fixed by the inner section on the turntable of the mobile crane, and the carriage of the hydraulic hoist with traverse moves on the outer section of the telescopic boom. 2. A mobile hoist for mounting, dismounting and moving bridge cranes according to claim 1, characterized in that the telescopic boom can be mounted on a turntable in a vertical position. 3. A mobile hoist for mounting, dismounting and moving bridge cranes according to claim 2, characterized in that the carriages are interconnected by means of hydraulic cylinders with the possibility of stepwise movement. 4. A mobile hoist for mounting, dismantling and moving the bridge cranes according to claim 1 or 2, characterized in that the outer section of the telescopic boom is equipped with a head with rollers for the chain hoist, which allows the mobile hoist to also be used as a jib crane when the telescopic boom is tilted.

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