SU1719305A1 - Rope-and-roller stand - Google Patents

Abstract

The invention relates to the construction and allows to increase the reliability of work and expand the functionality of the cable-roller stand, which consists of 1 mounted on platforms. Each support is made in the form of two pairs of pillars 4 and 5 and interbridge polyspasts stored between them with support rollers interconnected in a flexible chain. One end of the chain is fixed on the rack 5, and the other is thrown over the second rack 4 supports. Each ogadra is also provided with a movably mounted on the platform 1 with the possibility of fixing with a winch, on the drum of which the ends of the lifting ropes of the chain hoist are fixed. Racks 4 and 5 of each support are equipped with a mechanism for their mutual movement. 1 hp f-ly, 6 ill.

Description

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The invention relates to the construction, in particular to the construction of stands used in the installation and repair of lengthy tons of hacking structures.

The purpose of the invention is to expand the functionality and increase the reliability of the stand.

Figure 1 shows the cable-roller stand, front view; figure 2 - the same plan; on fig.Z - section aa in figure 2; figure 4 - section bb in fig.Z; FIG. 5 is a diagram of rope storing; on figb - section bb In figure 2.

The cable-roller stand contains two (or several) cargo platforms 1 moving along the track 2. The platforms are installed at a distance from each other, determined by the location of the centers of mass of each section of the lengthy design 3. On each platform two pairs of supports are installed: left 4 and right 5, the height of the supports is somewhat greater than the maximum radius of the structure. The supports 4 and 5 in each pair are mutually movable by means of a screw drive 6, the screw of which 7 is made at the ends with multidirectional winding (left and right thread) and passed through the nuts 8 fixed in the lower part of the supports 4 and 5.

The supports 4 of each pair are provided with bypass blocks 9 and mounted on a common frame 10 on which the winches 1.1 are placed. On the drums of each winch 11 are fixed one ends of the carrying ropes 12, wound on these drums in one direction. The other ends of each rope 12, through the tap-off units 13, are stored in two flat polyspasts 14, roller cages 15 and 16 of which are fixed on the upper parts of supports 4 and 5. On the threads of each pulley 14, roller chains consisting of a plurality of axes 17 are laid, on which rollers 18 for supporting the structure and rollers 19 for supporting on the rope 12 are alternately mounted. On two sides, axles are connected by cheeks 20. At one end each chain is fixed to the cage 16 of the chain pulley, and on the other side it hangs down along the support roller 9 four.

Rope-roller stand works as follows.

Platforms 1 are placed on the track 2 in accordance with the position of the center of mass of the sections of the structure and in order to provide close or early loads to the tackle. The distances between the supports 4 and 5 on each platform are set according to the diameters of the sections of the structure 3 and each section of the structure is placed on its platform with a crane, so that the gap between the sections of the structure is maintained. The alignment of parts of the structure is ensured by the presence of the pulley blocks and roller chains laid on their threads, one ends of which hang loosely behind the supports 4, i.e. reducing or dissolving the polyspasts of each platform, the alignment of parts of the structure and adjustment of the stand to one or another diameter of the parts of the structure 3 is made.

In the event of a significant difference in the axial clearance at one joint, the adjustment is performed by shifting the winch using the stops 21.

After applying reliable tack

The winch of each platform can be released from the stops 21, which will provide load balancing in the hoists.

When providing electric or mechanical connection for the drive of the winch 11 and the drive of the screw 6, the centered tackles of both platforms retain the alignment automatically during further operation. Elimination of errors is achieved only by operating the winch drive, while eliminating the parallel displacement along the height of one of the sections of the structure, and to eliminate the skew, the winch 11 is displaced by pores 21.

The use of the stand of the proposed design provides the ability to quickly changeover, which in turn allows the processing of stepped cylindrical structures of various diameters (apparatuses, tanks, flues), to keep the four points of support after joining the two parts of the structure (due to balancing), which allows processing fragile structures (plastic,

glass), as well as t zhelovesnye design due to the distribution of the load. The ability to lean on tackles with roller chains allows you to avoid high contact stresses. This increases the reliability of the stand and allows the processing of thin-walled structures, as well as structures having ribs on the outer surface.

Claims (2)

1. Rope-roller stand containing platform-mounted supports, each of which is made in the form of two pairs of racks and cable-block polyspasts with support rollers on ropes stored between the racks of each pair, characterized in that in order to increase reliability and enhance functionality by providing fast changeover, each support is equipped with a winch, movably mounted on the platform with the possibility of fixation, and mechanisms for the mutual movement of the struts of each pair, while the rollers of the chain hoist s between 0J 18 0 by themselves into a flexible chain, one end of which is fixed on the first rack, and the other is thrown over the second rack, with the escaping branches of the tackle in the support fixed on the winch drum. 2. Stand on p, 1, about tl and h a y i and c. the fact that the winch and the mechanism for the mutual movement of the supports are equipped with interconnected drives. FIG. Z Aa 12 Fi.Z 20.  D OHJHET 17 & Figl  / 13 12 (puff. 5 17