SU753781A1 - Mounting device of crane with telescopic tower - Google Patents

Description

The invention relates to the field of cranes, mainly self-erecting cranes with a telescopic tower. A mounting device of a crane with a telescopic tower is known, which contains the towing hoist of the tower and its extension sections, the fixed one of which is fixed to the legs of the form plate, and movable by means of OT, J is suspended to the fixed section of the tower l. The disadvantage of this mounting device is the complexity of the design, consisting of two assembled tackles, one of which is built in between the telescopic sections of the tower, the need for separate blocking of these tackles, the lack of automatic self-installation of the locked tackle, discontinuity of installation due to manual switching of the tacks, unproductive losses and low security of manual work during installation. The purpose of the invention is to simplify installation, increase productivity and unload the tower. This is achieved by moving the tackle cage onto the cage with two rows of blocks - upper and lower, located respectively on the upper and lower part of the movable cage, while the lower part of the movable casing {.1y is made with end stops with fingers for the lower fixed cage, the blocks of the lower part of the movable cage are covered by the cable of a polyspath, and the upper row of blocks of the upper part of the movable casing is covered by a strand, the second end of which is fixed to the fixed section, and the fixed cage is provided with lateral support posts and with guide longitudinal slots located in the plane of the chain hoist and transverse holes for positioning the fingers at different heights. FIG. 1 shows a side view of a crane mounting device when the tower is raised from a horizontal to a vertical position in FIG. 2 is a side view of the crane mounting device with telescopic expansion — tower sections; in fig. 3 - scheme of stocking of the cargo rope in the cargo and assembly of the crane and protruding polyspas -

on the mounting device; in fig. 4 - mounting hoist in two positions of the upper - acting and blocked; in fig. 5 - the same, side view; in fig. 6 is a view A of FIG. 4 (view of the side supports from the side of the guide longitudinal groove); FIG. 1- view of FIG. 6 (view of the side supports from the side of the cross holes for the locating pins); in fig. 8 is a section bb of FIG. 6, (along the axis of the end stop of the lower row of blocks of the movable camshaft).

The mounting device 1 of the crane 2 with the telescopic tower 3 consists of the mounting polyspast 4 with the lower fixed 5 and the upper movable 6 holders with the cargo cable 7 stored on them and the assembly delay 8 telescopic extension of the upper movable section 9 from the lower fixed section 10 of the tower 3. Oboyma 5 of the chain pulley 4 is fastened to the uprights 11 of the platform 12, and the yoke b is suspended from the tower 9 section 9 by means of the projectile 8. The withdrawal 8 is attached to the base 14 of the extendable section 9 by the pull end 13 and overtakes the blocks 15 on the upper part of izhnoy section 10, zapasovana on the blocks 16 of the upper row of the movable yoke 17 b and the free end 18 is attached to the upper part 10 of the tower section 3. Ott buckle arrangement 8 may be formed odnor mnogor discharge or discharge, the equalization unit 19,

The cage 6 of the polyspast 4 has two rows of blocks mounted on parallel axes: the upper part of the cage with blocks 16 and the lower part of the casing 2 with blocks 21. The lower part of the cage 20 is made with end stops 22 ,. having a recess 23 for the fingers 24 of the lower casing 5. The clip 5 with blocks 25 is provided with lateral support posts 26, made with guide longitudinal grooves 27, located in the plane of the polyspast 4, and with transverse holes 28 for placing the fingers at different heights. In blocks 21 and 25, the stockan Kans1T stockpile operating from the cargo winch 30 is used. The crane’s Arrow 31 is connected by means of 32 with racks 11 of platform 12.

The construction of the mounting device of the crane with a telescopic tower works as follows.

When mounting the crane, 2 towers 3 from a horizontal position (Fig. 1) are shifted to a vertical position and telescopically moved apart to the required height (Fig. 2). These operations are carried out by the device 1 using the drive of the winch 30 and the rope 29 (Fig. 3).

When the winch 30 is turned on at the height of the tower 3 (Fig. 1), the chain hoist 4 has the maximum multiplicity, bears more pressure and provides the most expedient lower lifting speed. In this section 9 and 1 of the tower 3 are blocked among themselves. After installing and fixing the tower 3 to the vertical position (Fig. 1 and 2) and unlocking sections 9 and 10 of the tower 3, further operation of the chain hoist 4 causes the telescopic extension of the upper section 9 from section 10 of the tower 3 due to the force acting in the lifting end 13 of the OTT 8. The magnitude of the mounting load varies simultaneously (decreases), since only the upper part of section 9 of tower 3 rises, and the polyspath 4 automatically switches to a reduced multiplicity due to running over 8 by means of blocks 16 of upper 6 polyspast 4 from the detachable end 13 to the free end, behind the root section 10 of the tower 3. At the same time, while maintaining the speed and path of convergence of the holders 5 and 6 of the polyspast 4 and the force in the rope 29, the lifting speed of the upper section 9 of the tower and the course of the telescopic expansion of the tower sections increase. At the end of the telescopic extension of the tower section 9, the upper holder 6 with their stops 22 of the lower part of the holder 20 of the block 21 enters the guide longitudinal grooves 27 of the uprights 26 of the holder 5 and recesses 23 self-aligning on the fingers 24 at the desired height. After interlocking the sections 9 and 10 of the tower 3, the fingers 24 are mounted in the openings 28 at a level that provides an unloaded condition of the protrusion 8 with further loading of the rope 29 with working loads during the operation of the crane with a load. The operation of the mounting device when dismantling the crane is carried out in reverse order.

Claims (1)

Invention Formula A mounting device with a telescopic tower containing the tower lifting and spacing of its sections, the fixed cage of which is fixed to the platform legs and movable is suspended to the sliding section of the tower by means of a delay, in order to simplify installation, increase productivity and unloading towers, the movable cage of the polyspast is made with two rows of blocks - upper and lower, located respectively on the upper and lower movable casing, while the lower part of the movable casing is made with end stops with a notch under the fingers of the lower fixed yoke, blocks of the lower part of the movable yoke are covered by a rope of the chain hoist, and the upper NII of a number of blocks of the upper part of the outer yoke is covered by a bracing, the second end of which is fixed to the fixed section, and the fixed yoke is provided with lateral supporting struts with longitudinal grooves located in the plane of the chain hoist and transverse holes to set fingers at different heights. Sources of information taken into account in examinations 1, USSR Author's Certificate No. 286168, cl. 66 C 23/16, 1969 (prototype). . four