RU2269619C1 - Hoisting apparatus for ice-protective shell mounting - Google Patents

Abstract

FIELD: bridge building, particularly equipment to erect ice-protective shells.

SUBSTANCE: hoisting equipment comprises support columns with through perforated orifices arranged at predetermined intervals one from another, as well as beams arranged over and below jacks and provided with sliding fingers. The fingers are coaxial with the perforated orifices. The hoisting equipment also has hydraulic cylinders with safety supports rested upon beams arranged below the jacks, pumping station, control system, oil tank and safety means. Beams arranged over jacks have tie-down means with claws connected to upper part of ice-protective shell. The support columns are coaxial to pile cluster and connected thereof by plates and support frames. Upper parts of the support columns are connected one to another by frame, lower parts thereof are linked by removable spacing bar. The beams located over and below the jacks are H-shaped and have free ends enclosing the support columns. The beams have working plates having closed contours and arranged around beam perimeters. The hydraulic cylinders are connected in pairs to create rows. Safety means are made as safety cages. The cages include a number of members installed one upon another. Height of each member is equal to multiple hydraulic cylinder strokes.

EFFECT: increased accuracy of shell superposing with support axis, improved safety of hoisting operations along with reduced labor inputs.

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Description

The invention relates to bridge construction and can be used for mounting an ice sheath on a pile bush of a bridge support.

A lifting device for mounting bridge structures is known, including support columns with through perforations made at a certain pitch, jack-and-jack beams with retractable fingers arranged coaxially to the perforations, hydraulic cylinders with safety supports based on jack beams, a pump station, a control system, a tank for oils and safety devices / 1 /.

A disadvantage of the known load-lifting device is the impossibility of its use for mounting an ice-protective casing due to the lack of devices for fixing it on a pile of piles, slinging devices for its capture, as well as working platforms on jack-and-under-jack beams for servicing operations to lower the ice-casing.

The present invention is intended to solve the technical problem of lowering and mounting a multi-ton (400 t) structure of an ice-protective shell with maximum accuracy of aiming on the support axis and ensuring guaranteed safety of lifting operations with minimal labor.

The stated technical problem is solved due to the fact that in the lifting device, which includes supporting columns with through-hole perforations made with a certain pitch, jack-and-jack beams with retractable fingers located coaxially to the perforations, hydraulic cylinders with safety supports, supported by jack lifts, a pump station, control system, oil tank and safety devices, double-beam beams are equipped with sling devices, the grips of which are attached to the upper part These are ice-protective shells, supporting columns are aligned with the pile bush, fixed on it by means of tables and supporting frames and are interconnected in the upper part by the frame and in the lower part by a removable spacer, while the double-deck and double-deck beams are made H-shaped, the free ends of which enclose supporting columns, and are equipped along the contour with working platforms of a closed shape, and the hydraulic cylinders are pairwise hydraulically combined into batteries, and the safety devices are made in the form of safety cells, consisting of a number of tanovlenii elements on each other, wherein the height of each of these multiple stroke of the piston of the hydraulic cylinder.

The invention is illustrated by drawings, where:

- figure 1 shows a lifting device, side view;

- figure 2 shows a lifting device, section aa;

- figure 3 shows a lifting device, section BB.

Support pads 2 and tables 3 with support frames 4 are pre-mounted on the pile bush 1. A pallet 5 and side panels 6 of the ice casing formwork are mounted on the supporting platforms 2. The ice casing is concreted and after the concrete strength is set to the design strength, the side shields 6 and their dismantling. A lifting device 8 is mounted on the tables 3 with the supporting frame 4 and with it, the ice protection shell 7 is torn off the pallet, then the tray 5 and the supporting platforms are removed 2. The ice protection shell 7 is lowered using the lifting device 8 to the design position and fastened to the pile bush 1 Then, the lifting device 8 is dismantled and the tables 3 and the supporting frames 4 are removed from the pile bush 1.

The lifting device 8 for mounting and lowering the ice casing 7 includes supporting columns 9 coaxially located to the pile bush 1 (this means that the axis of the supporting columns are symmetrical and parallel to the vertical axis of the pile bush) and in which 11 are made 11 and jack 12 beams with retractable fingers 13 located coaxially with the perforations 10.

The supporting columns 9 are mounted on the pile bush 1 by means of tables 3 and supporting frames 4 and are interconnected in the upper part by the frame 14, and in the lower part by a removable spacer 15. On the jack beams 12 hydraulic cylinders 16 are hydraulically combined in batteries, the pump station 17 , control system and oil drain tank (not shown in the drawing). The jack-type beams 11 are equipped with sling devices 18, the grips 19 of which are attached to the upper part of the ice casing 7. The jack-and-jack 11 and jack-12 beams are made H-shaped, the free ends of which surround the support columns 9, and are provided with a contour of working platforms 20, 21 of a closed shape. Safety cages 22 are located on the jack beams 12 and consist of a series of removable elements mounted on top of each other, while the height of each removable element is a multiple of the piston stroke length of hydraulic cylinders 16. To prevent accidents, hydraulic cylinders 16 are equipped with safety supports (not shown in the drawing).

A lifting device operates as follows.

Using jacks 16, jacks 11 are lifted and the fingers 13 are removed from the perforations 10. The hydraulic cylinders 16 are held in position by means of check valves, safety supports and safety cells 22. Then, fingers 13 are placed in the lower perforations 10 to the piston stroke height and lowered jack girders 11 with an ice sheath attached to it until it rests on the fingers 13, having previously removed the safety supports and safety cages 22. During lowering the ice sheath 7 by starting the control system valves, oil is drained from the hydraulic cylinders 16 into the oil collecting tank. As the ice protective shell 7 is lowered, part of the safety supports and safety cage elements 22 are dismantled to the piston stroke height, and a removable spacer 15 is also dismantled in the final lowering stage.

Using the hydraulic cylinders 16, the jack beams 12 are lifted, the fingers 13 supporting them are removed, and the fingers 13 are rearranged in the lower perforations 10 to a height equal to the stroke of the piston. Then, using the hydraulic cylinders 16, the jack beams are lowered until they rest on the fingers 13. After this, the process of lowering the ice casing 7 is repeated until it reaches its design position, and then the ice casing 7 is mounted on the pile bush 1 and the lifting device 8 and the tables 3 with supporting frames are removed four.

The load-lifting device for mounting an ice-protective shell according to this invention will significantly reduce labor costs by eliminating the use of expensive floating vehicles, large-capacity floating cranes and loading and unloading ice-protective shells, the weight of which can reach 400 tons.

The source of information

1. A.S. USSR No. 937599, IPC E 01 D 21/00, decl. 12/01/80, publ. 06/23/82.

Claims (1)

A load-lifting device for mounting an ice-protective shell, including support columns with through-hole perforations made at a certain step, jack-and-jack beams with retractable fingers arranged coaxially to the perforations, hydraulic cylinders with safety bearings, supported by jack beams, a pump station, a control system, an oil tank and safety devices, characterized in that the jack girders are equipped with sling devices, the grips of which are attached to the upper part of protective cover, supporting columns are located coaxially with the pile bush, fixed on it by means of tables and supporting frames and are interconnected in the upper part of the frame and in the lower part by a removable spacer, while the double-deck and double-deck beams are made H-shaped, the free ends of which surround the supporting columns, and equipped with a contour of the working sites, and the hydraulic cylinders are pairwise hydraulically combined into batteries, and the safety devices located on the jacked beams are made in the form of safety cells, consisting of a number of mounted on top of each other elements, and the height of each of them is a multiple of the piston stroke of the hydraulic cylinder.

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