SU759230A1 - Apparatus for guniting steel casting ladles - Google Patents

Description

The invention relates to the field of metallurgy, in particular to a device for gunning refractory lining of casting ladles.

A device for gunning of metallurgical ladles is known, consisting of a carrying platform, a vertical column, a tubular material pipeline, a nozzle with a rotational drive [1].

A disadvantage of this device is the connection of the mixing chamber with the nozzle, which leads to insufficient moistening of the spray gun at the outlet.

The aim of the invention is to improve the quality of shotcrete and reliability _{) 5} devices.

This goal is achieved by the fact that the mixing chamber in the proposed device is equipped with a replaceable cone of wear-resistant rubber separating the central and peripheral cavities of the chamber. The cone is reinforced in a metal cup, so that its lower part protrudes from the cup, presses against the chamber seat, separating the cavities and can be wrung out

2

from the saddle, forming an annular gap connecting the cavity.

Improving the process of moistening shotcrete powder in the proposed device helps to remove the mixing chamber from the nozzle. The camera is mounted on the upper end of the vertical non-rotating material pipeline, and the nozzle - on the bottom. The rotation of the nozzle is transmitted remotely through the hollow shaft from the drive, mounted on the top platform of the lifting rod;

The lifting rod and the lifting drive are mounted on the carrier frame of the device, which in turn is cantilever-mounted on a rotary column installed on the foundation of the bucket repair pit. The feed material lines of the shotcrete powder and the humidifier with the sections of flexible hoses are constantly connected to the mixing chamber.

FIG. 1 shows the proposed device, a general view; in fig. 2 - view A of FIG. ! ·; in fig. 3 shows a section BB in FIG. one; in fig. 4 scheme of the mixing chamber.

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The device 'includes the' 71 ^- existing frame ^- T, which is fixed to the rotary column 2, ⁷

⁷ vertical lifting rod 3 and the actuator 4 lifting rod, 'mounted on the frame.

In the rod there is a tubular material conduit ₅ , 5 with a mixing chamber 6 fixed on it. The mixing chamber consists of a central 7 and peripheral 8 cavities, a saddle 9, a metal cup 10 and an interchangeable rubber cone 11. Between the rod and the material 10 there is a hollow shaft 12 with a nozzle 13 on the bearings. reinforced at the top of the bar. The nozzle is equipped with a method for changing its angle of inclination. 15

The device works as follows. Intended for shotcrete bucket

set in the repair pit, then the carrier 'frame 1 with the raised rod 3 is rotated to align the axis of the rod with the axis of the bucket. From the 20th control panel, the gunpowder is turned on, and then the humidifier. Spinning powder (see Fig. 4) enters the central cavity 7 of the mixing chamber under compressed air pressure P! = 3.5 atm, and the humidifier - in the peripheral cavity 8 under pressure from the pump P ₂ = ..- 5 atm. Due to the high pressure, the humidifier pushes the lower part of the rubber cone 11 from the saddle 9 and through the resulting

The annular gap falls into the central cavity, where it connects to the shot gun. Next, the torus ...... cretpowder passes through the tubular material line 5, where the process of its moistening continues, and is ejected through the nozzle 13. Turning on the rotational drive 14 and the drive 4 35

the lifting rod nozzle reported movement in a spiral and uniformly applied gunning on the surface of the lining of the bucket. Torkretirov759230

four ".

The bottom of the bucket is produced by changing the angle of the nozzle in the vertical plane using the mechanism 16. By switching the direction of the boom and the direction of rotation of the nozzle, localized gunning of the most-recognized part of the lining and individual wash-outs is carried out.

The design of the mixing chamber eliminates the possibility of shotcrete powder entering the cavity and route of the humidifier, which significantly increases the reliability of the device.

Claims (2)

Claim 1. Device For gunning of steel casting ladles, containing a supporting frame, a lifting rod with a vertical tubular material line, a rotating nozzle and a mixing chamber with a central and peripheral cavity, lifting the rod and rotating the nozzle, to improve quality of gunning and reliability of the device, the mixing chamber is equipped with a replaceable rubber cone, with a rubber cone installed in the glass, and its lower part is adjacent to the chamber saddle. 2. Device by π. 1, that is, that the mixing chamber is fixed on the upper end of the material guide, the lower end of which freely enters the rotating nozzle connected. ' by means of a hollow shaft with a rotating drive.