SU1502763A1 - Spreadable and hoistable scaffold - Google Patents

Abstract

The invention relates to the construction and can be used in the external repair of industrial chimneys with variable diameter. The purpose of the invention is the expansion of operational capabilities. Scaffoldings are equipped with horizontal beams, on which sections 6 of the platform 1 are supported, fixed to the beams by blocks 8 and 11 and supporting a pivot-lever mechanism. Ropes 2 of the sliding and lifting mechanism in the lower part are placed horizontally with the span of blocks 11. Blocks 8 are installed at the point of change of the rope direction and fixed on the horizontal axis with the possibility of rotation in the vertical plane. 5 il.

Description

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IpoG retsnis refers to the construction and can be used in the external repair of industrial chimneys with a variable diameter,. The purpose of the invention is to expand the operational capabilities.

FIG. 1 shows the scaffolding placed on a section of a large diameter chimney; in fig. 2 - the same, in the area of smaller diameter; in fig. 3 shows section A-A in FIG. one; in fig. 4 is a view B in FIG. one; in fig. 5 shows the node I in FIG. one.

Sliding lifting sweep from platform 1, the mechanism for sliding and raising the scaffolding is made in the form of three ropes 2, the upper ends of which are thrown over blocks of quick-detachable brackets installed on the top of the chimney 3. Platform 1 is made of connected a hinged-lever mechanism 4 and evenly spaced around the sections of sections supported by horizontal beams 5, straightened in the form of arcuate plates 6, which are connected at one end by means of hinges 7 to beam 5, and the other one rests on the adjacent same plate 6 to form a scaffold. Three horizontal beams 5, located one from the other at an angle of B 120 °, are equipped with blocks 8, which are mounted in brackets 9 and can be rotated around axis 10 in a vertical plane, ensuring their installation in accordance with the direction of the ropes 2, going to the top of the chimney 3 The remaining beams 5 have blocks 11, mounted on fixed vertical axes x 12. The lower ends of the ropes 2 change the vertical direction to horizontal on blocks 8 and, rounding blocks 11 located between blocks 8, are attached to the bracket after single

Thus, the reserve bottom

rope ends 2 provides coverage

all blocks 8 and 11, which creates a constant pressing of the rollers 13 to the surface of the chimney 3. Each beam 5 is equipped with a stand 14, in which the rods 15 are located, which serve as a fence for the platform 1. At the same time, the rods 15 are rigidly fixed in the holes racks 14, while their other ends are located with possible

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By this, the polygonal contour of the platform 1 is provided, the carriers of the crossbar 5 of all sections of which cannot change their position relative to each other and are always radially directed.

The lever mechanism 4 consists of internal 17 and external

18 shoulder arms, the upper ends of which are connected to each other and with the beam 5 axles 19, and the lower ends

and the middle is connected only to each other by axes 20. The openings at the ends of the levers 17 and 18 match with the axles

19 and 20 by means of spherical bushings 21, which allows the chain of the hinge-lever mechanism 4 to bend into a closed polygon, which gives the movable platform 1 the required rigidity. If it is necessary to increase the rigidity, the movable platform 1 can be equipped with two or more concentric polygons consisting of articulated lever mechanisms. If there are 3 horizontal plates on the chimney, the bolted fastenings of which significantly protrude above the pipe surface, it is advisable to reduce the number of rollers 13 so that they freely pass between the bolted fasteners. When there are longitudinal protruding elements on the chimney, for example, ladders, the arcuate plates 6 for this place are narrowed, and if necessary, the beams 5 are shortened. In this case, the inner polygon of the hinge-lever mechanism 4 is located at such a distance from the surface of the pipe 3, so that when moving the platform 1 he could not hook onto the protruding 3 parts above the pipe.

The arcuate plates 6 have a length sufficient to cover the gap between two adjacent beams 5 at the largest size of the working platform. Their curvilinearity should provide minimal gaps between them and the pipe 3, which meet the safety requirements for the repair of pipe 3. With an increase in the number of sections, the arcuateness of the plates 6 can be reduced or even straightforward.

Sliding lifting pews work as follows.

 The scaffolding is collected from the base of the chimney 3 and moored along its perimeter with a slinging device. The lifting of the scaffolding is carried out by means of a winch that moves the ropes 2 upwards, while the ropes 2, by storing them on the tap-off blocks 8 and 11, pull the supporting rails 5 to the smallest diameter limited by the interaction of the rollers 13 with the chimney 3, reducing the size of the working platform scaffolding with a decrease in the diameter of the pipe occurs automatically by shrinking the unsteady crossbars 5 to the interaction of the rollers 13 with the pipe 3. When the rollers 13 are hit on the fastening of the pipe 3, the supporting crossbars move apart when lowering the scaffolds under the action of its own weight on the pipe section 3 with a large diameter, the scaffolding decreases and increases in the working platform and is accompanied by displacement of the beams 5 relative to each other in the circumferential direction, while due to the presence of the hinge-lever mechanism 4 they are located at equal distances from each other friend, i.e. the angle between them for all changes in the working platform remains unchanged and is equal to the quotient of dividing 360 by their number.

In addition, the lever mechanism 4 ensures that all the beams 5 are placed on the same level, and by placing the levers 17 and 18 on the axles 19 and the lower axes 20 on the spherical bushings 2 T, the elements of the hinge lever mechanism 4 can be rotated in a horizontal plane relative to each other at an angle equal to the central angle between the bolts 5, forming a rigid annular structure that perceives all bending loads acting on the elements of the scaffolding. When the dimensions of the scaffolds change, the unfixed ends of the rods 15 move in the openings of the uprights 14, preventing the beams 5 from rotating in the horizontal plane. When the angle of inclination of the ropes 2 changes, the side blocks 8 self5 are mounted by turning the brackets 9 on the axles x 10.

Claims (1)

Invention Formula 0 Sliding lifting platforms, mainly for the repair of chimneys, including a working platform covering a pipe, made of movable relative to one another 5 sections, a mechanism for expanding and raising scaffoldings in the form of ropes bindings attached to a lifting device and to sections of the platform, thrust rollers interacting 0 with a chimney surface, and a fence, characterized in that, in order to expand operational capabilities, the scaffolding is equipped with horizontal beams, on which sections of the platform are supported, which are fixed to the beams with blocks and supporting hinge-lever mechanism, and the ropes of the sliding mechanism and the lifting mechanism The bottom of the module is placed horizontally with a span of blocks, with the blocks installed at the point of change of the rope direction fixed on the horizontal axis with the possibility of rotation in the vertical plane. FIG. 2 12 Thebes about Editor A. Motyl Compiled by E. Volkova Tehred L. Oliynyk Order 5058/42 Circulation 644 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 FIG. five Proofreader M. Pojo Subscription