SU842172A1 - Suspended platform for working inside blast furnace - Google Patents

Description

(54) SUSPENDED PLATFORM FOR THE PRODUCTION OF WORKS INSIDE THE DOMAIN FURNACE

I

The invention relates to the mechanization of new structures and the repair of existing blast furnaces.

A device for dismantling plate coolers and breaking the lining of blast furnaces, comprising a manipulator with a telescopic boom and a percussion mechanism, mounted on a suspension platform equipped with spacer beams.

A suspension platform in such a device is provided with four spacer beams, each of which has several moving elements, the smallest dimension of which in the folded position should not be more than the diameter of the suspension platform. Such a design of the spacer rays is determined by the fact that the diameter of the suspension platform must be less than the diameter in the light of the top flange of the blast furnace to pass through it when the suspension platform is inserted into the furnace, and at the same time the ends of the distance rays must reach the inner surface of the blast furnace casing in its largest diameter to create a stable position of the suspension platform at any level

According to the height of the blast furnace. Since the largest diameter of the casing significantly exceeds the diameter of the top flange, and the spacer beams are installed radially relative to the vertical axis of the suspension platform, therefore each spreading beam in the known device is made with several movable elements 1.

Suspended platforms are also known in which the mobile elements of the beams are made either retractable from one another (telescopic), or folding, or combined, i.e. the root beam is made folding, and the peripheral - pull out of it 2.

However, in these platforms, spacer beams, each of which is made with

S by several moving elements, are structurally complex and unstable in case of a power thrust due to an increase in the total gap between each moving element.

0

Closest to the proposed in its technical essence and the achieved result is a suspension platform, in which the moving elements of the rays

equipped with separate actuators for their extension 3.

A disadvantage of the known suspended platform is that the movement of the moving elements of the rays is not performed simultaneously, but successively, manually, by rotating the gear knob, which moves the moving element up to its stop in the casing of the blast furnace. Such a structure does not allow the suspension platform to be centered about the vertical axis of the blast furnace casing. As a result, the suspension tapes are loaded unevenly, which is of great importance when mounted on a suspension platform of a hydraulic power manipulator, which transfers dynamic loads to it. In addition, the thrust force of the movable elements is not enough, since their extension is carried out manually and there is no fixation.

The purpose of the invention is to increase the stability of the suspension platform.

The goal is achieved by the fact that the suspension platform for performing work inside the blast furnace, comprising a platform, spacer beams with moving elements, suspension belts and drive mechanisms for moving the spacer elements of the distance beam, is provided with fixed elements of the distance beam that are fixed to the site and form an equilateral triangle in plan inscribed in its perimeter, while the mobile elements of the spacer beams are placed inside the stationary, and the drive of the mobile elements contains self-braking EPB chnuyu transmission.

FIG. 1 shows the proposed suspension platform, in plan; in fig. 2 - the same, side view.

The fixed elements of 2 spacer beams, forming an equilateral triangle in plan, are rigidly fixed to the skeleton 1 of the platform. To the movable elements 3 of the spacer beams, the toothed rails 4 and the supporting shoes 5 are fixed, which, as the elements 3 move apart, abut against the casing

6 domain furnace. Spreading and pulling. elements 3 takes place using drives

7c self-braking gear of the worm gear. Folding carrier forks 8 are used to install and secure the suspension platform at any elevation of the blast furnace to the suspension belts 9 that are held on the dome of the blast furnace (not shown).

Suspended platform works as follows.

Before the platform is introduced into the blast furnace, the movable elements 3 are drawn in via the actuators 7 to the extreme position, when they do not protrude beyond the dimensions of the suspension platform, the carrier plugs 8 are folded back onto the suspension platform. After inserting the platform into the furnace, and setting it at the desired elevation, the folding support forks 8 rotate around the fingers 10 by 180 ° so that the hanging straps 9 are in their mouth (shown in dotted lines in Fig. 2). Thereafter, using the fingers 11 and 12, the carrier plugs 8 are fixed in the reclined position. In order for the vertical axis of the suspension platform to be aligned with the axis 13 of the blast furnace, i.e. for this platform to be centered relative to the casing 6 by means of a remote control unit, simultaneously turn on the drives 7 of the movable elements 3 (not shown). As a result, the support shoes 5 simultaneously abut against the casing b, and the suspension plate (the T form is unfixed and fixed, and the suspension tapes 9 - evenly loaded. Removal of the suspension platform from the blast furnace occurs in reverse order. The proposed suspension platform can be used to install hydraulic power tools on it. nipul tori razrushayuschih- liner and remove the refrigerators in the repair of blast furnaces, but also for installation during assembly of pushers refrigerators again tup schihs remontiruyuschihs or blast furnaces.

Claims (3)

1. USSR author's certificate number 530055, cl. From 21 to 7/10, 1976. 2. Zalkind A.S. and others. Mechanization of repair work in blast furnaces. M., “Metallurgists, 1976, p. 90, fig. 42 a and b. 3. The patent of Germany No. 2225179, cl. 18a 7/00, published 1972. w –o 1 1-I I Il I r sg g him