RU2690132C1 - Lifting device - Google Patents

Abstract

FIELD: machine building.SUBSTANCE: invention relates to lifting-and-conveying machine building and concerns design of hoisting devices temporarily placed inside vertically serviced object. Lifting device comprises frame (11), platform mounted to move from upper position to lower position inside serviced object. Platform is made of bent tubes with support surface intended for arrangement of working and equipment. Cable-block drive is equipped with winch (10), a pair of double polyspasts (13) and (14), which blocks are installed on horizontal axes, limit switches of the platform lower and upper positions. Rope (8), (9) of each tackle block is stored through one pair of tackle blocks. Ends of ropes (8), (9) of tackle blocks (13), (14) are fixed with counterweight (7) with swivel, which is connected to platform (1). Each tackle (13), (14) is equipped with load (15) with possibility of ropes (8), (9) tensioning accordingly. Centrifugal catcher (12) is fixed on the frame, at that, rope (9) of one of tackle block (14), which is a safety line, is passed through the catcher, to prevent the site falling when another rope-tackle (13) other rope (8) is connected to winch (10).EFFECT: invention provides access to the entire surface of the object in cramped conditions by using a platform having small overall dimensions.4 cl, 3 dwg

Description

The invention relates to a lifting and transport machinery and relates to the design of lifting devices, temporarily placed inside a vertically installed object during installation, repair or finishing works, and can be used mainly in power engineering when performing various technological operations in cramped conditions.

Known lift to move inside a vertically installed object, containing connected to the drive platform installed on the cable conductors placed in the cavity of the object, a safety device, each of which is installed with the ability to interact with one of the conductors, and the site reloading prevention unit with a limit switch turned on into the drive control system, the drive of the site includes a winch with two drums mounted on the outside of the service object carrying the traction rope s (Patent RU No. 2026252 C1, IPC В66В 9/00, priority from 21.07.1992, publ. 09.01.1995).

The disadvantage of this lift is the restriction of access to the entire surface of the cavity of an object in cramped conditions (limited space) due to the fixing of cable conductors along the edges of the site, which interferes with the work with the internal surface of the object.

The closest in purpose, technical nature and the achieved result to the claimed as an invention is a device for servicing a remote object, containing a cabin (platform) mounted with the ability to move from the upper position to the lower position inside the object troso-block drive, made in the form of double the chain pulley, the blocks of which are installed on horizontal axes, and each of the cables (ropes) is stocked through one pair of arranged blocks, a centrifugal cam cam ipa, limit switches, the lower and upper cab provisions. (Patent RU №133108 U1, IPC В66В 9/00, priority from 03/04/2013, publ. 10.10.2013).

The disadvantage of this device is a design that does not allow its use in cramped conditions (limited space) due to the presence of the cabin, made with the doors opening inward, having an electric lock to prevent the doors from opening when the cabin is moved, which leads to an increase in the cabin dimensions.

The technical result of the proposed technical solution is access to the entire surface of the cavity of the object in cramped conditions (confined space) due to the use of the site, which has small overall dimensions, the fence of which is the inner surface of the object being serviced.

This technical result is achieved due to the fact that the lifting device containing the frame, the platform mounted to move from the upper position to the lower position inside the serviced object and made with a supporting surface designed to accommodate the worker and equipment, troso-block drive with a winch, containing a pair of double pulley blocks whose blocks are mounted on horizontal axes, with the rope of each of the pulley blocks being stocked through one pair of blocks of the pulley block, the centrifugal lo In accordance with the invention, the ends of the ropes of the splines are fastened with a counterweight to the swivel, which is connected to the platform made of bent pipes, each pulley is equipped with a load with the possibility of tensioning the ropes, the centrifugal catcher is fixed on the frame, with In this case, the rope of one of the tackle chains, which is a safety rope, is passed through the safety device to prevent the fall of the platform if another rope connected to the winch breaks.

At the same time the platform is equipped with a folding seat. In this case, the control panel is located on the site. At the same time, the winch of the troso-block drive is equipped with a redundant manual drive for lowering the platform.

The invention is illustrated by drawings, where:

in fig. 1 shows a general view of the lifting device, a longitudinal section;

in fig. 2 is a view A of FIG. 1, a troso-block device drive mounted on a frame is shown;

in fig. 3 shows a diagram of a Tros-block device drive.

When describing a lifting device, the positions in the drawings denote:

1 - playground

2 - troso-block drive

3 - control panel

4 - bent pipe site

5 - folding seat

6 - serviced object

7 - counterweight with swivel

8 - main rope

9 - safety rope

10 - winch

11 - frame

12-centrifugal catcher

13 - main chain hoist

14 - polyspast belay

15 - load

The lifting device consists of the following main components: platform 1, troso-block drive 2 and control panel 3 (Fig. 1). Site 1 is a welded metal structure of bent pipes 4, is made with a supporting surface, designed to accommodate the working equipment, equipped with a folding seat 5 for ease of operation. The platform 1 is mounted for movement from the upper position to the lower position inside the serviced object 6. The barrier for the platform 1 is the internal surface of the object 6. The platform 1 is suspended through the counterweight 7 with a swivel to the troso-block drive 2 by means of two steel ropes, one of which is the main one is 8, and the other rope is a safety 9. The ropes 8 and 9 of the troso-block drive 2 serve to move the platform 1 from the upper position to the lower inside the serviced object 6 by a winch 10. Hanging the floor adki one to two ropes 8 and 9 is provided to avoid it from dropping in the event of breakage of one of the ropes. To control the winch 10 on the platform 1 is a control panel (not shown). The counterweight 7 with a swivel serves to enable the lowering of the ropes 8 and 9 inside the object 6 and connecting them to the platform 1. Tros-block drive 2 is a welded steel frame 11 on which a winch 10 is mounted, a cam-type centrifugal catcher 12, a pair of double-pulley 13 and 14, the blocks of which are mounted on horizontal axes. One of the pulley 13 is the main, the other of the pulley 14 is a safety. The rope of each of the polyspasts stocked through one pair of blocks of the polyspast (Fig. 2, 3). The ends of the ropes 8 and 9 of the pulleys 13 and 14, respectively, are fastened with a counterweight 7 with a swivel, which is connected to a platform 1 made of bent pipe 4. Each pulley 13 and 14 is equipped with a weight 15 with the possibility of tensioning the respective ropes 8 and 9. Loads 15 mounted on the frame 11 with the possibility of free vertical movement along the racks of the frame 11. Troso-block drive 2 is equipped with limit switches of the lower and upper position (not shown) to automatically turn off the winch 10 when the upper and lower limit are reached st platform 1. The winch rope 10, Drive block 2 is provided with a redundant manual actuator (not shown) to lower the platform 1 in case of power or other external power supply faults. The centrifugal cam-type catcher 12 is fixed on the frame 11, while through the catcher 12 the safety rope 9 of one of the polyspasts 14, which is safety to prevent the fall of the platform 1 when the rope 8 of the other polyspast 13 breaks, which is the main one associated with the winch 10, is passed. 14 and the weights 15 serve to tension the free ends of the rope 8 or 9 after the winch 10 and the centrifugal safety device 12. The control panel 3 is mounted on the troso-block drive 2 for controlling the electrical equipment of the platform 1.

The lifting device operates as follows.

Install the frame 11 of the TSR-block drive 2 on top of a vertically mounted object 6 for performing work inside it and fix. Driving the winch 10 using the control panel 3, through which the main cable 8, connected to the load 15 through the main pulley 13, lowers the counterweight 7 with the swivel inside the object and attaches the platform 1. The worker is placed on the platform 1, sits on the folding seat 5 and, controlling the console located on site 1, rises to the required height for work inside the facility 6. After carrying out the necessary work, the worker descends from facility 6, for which he controls the control panel and lowers down platform 1 to the exit and its object of 6, disable the remote control. In the event of an emergency when the main cable 8 breaks, the safety rope 9 connected to load 15 through the chaining hoop safety 14 starts to be held by safety gear 12 and thus prevents the fall of platform 1. In case of disconnection of the external power supply or the occurrence of other faults, the worker switches on the backup manual the drive mounted on the winch 10, and lowers the platform 1.

Thus, the use of the proposed working lifting platform provides access to the entire surface of the object's cavity in cramped conditions (confined space) through the use of a platform of small overall dimensions, which is guarded by the inner surface of the object being served.

Claims (4)

1. A lifting device containing a frame, a platform mounted for movement from the upper position to the lower position inside the serviced object and made with a supporting surface designed to accommodate work and equipment, a tros-block drive with a winch containing a pair of double pulley blocks whose blocks installed on horizontal axes, with the rope of each of the chain hoists stocked through one pair of blocks of the chain hoist, the centrifugal safety device, and the limit switches of the lower and upper polo Site, characterized in that the ends of the ropes of the polyspasts are fastened with a counterweight to the swivel, which is connected to the platform, made of bent pipes, each of the polyspast is equipped with a load with the possibility of rope tension, the centrifugal catcher is fixed on the frame, while , which is a safety, to prevent the fall of the site in the event of a cliff of another rope connected with a winch. 2. Lifting device according to claim. 1, characterized in that the platform is equipped with a folding seat. 3. Lifting device according to claim. 1, characterized in that the control panel is located on the platform. 4. Lifting device according to Claim. 1, characterized in that the winch of the troso-block drive is equipped with a redundant manual drive for lowering the platform.

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