RU32112U1 - Device for measuring liquid metal parameters - Google Patents

Description

DEVICE FOR MEASURING LIQUID METAL

The proposed utility model relates to ferrous metallurgy, in particular to oxygen-converter production, and can be used to measure liquid metal parameters, for example, temperature.

A measuring probe is known for introducing a measuring sensor into a liquid bath of a metallurgical unit, comprising a water-cooled tuyere with a central pipe and a contact pipe connected thereto for mounting the sensor, a conical cylindrical reflector connected to the upper end of the sensor and the contact pipe with the formation of an open cavity, holes are made in the side surface of the contact tube within the open cavity of the reflector (patent No. 1779264, C21C 5/48).

Closest to the proposed device is a probe for measuring the parameters of liquid metal containing coaxially arranged pipes, the central of which houses the wires of the measuring unit installed in the head by means of a contact pipe, the middle and outer pipes form cooled shirts, two pipes, one of which is connected to an annular the gap between the Central and middle pipes, and the second is connected to the annular gap between the middle and outer pipes, an additional pipe connected to the annular Hur between the middle and outer tubes, the probe head formed in at least two concentric couQji. // {772ShchS21S5

The disadvantages of the above designs are the explosion hazard due to burnout or mechanical damage to the lance and water entering the converter, design complexity, insufficient protection of the measuring unit from splash of slag, metal, high temperature.

The problem is solved in that the device for measuring the melting parameters includes concentrically arranged pipes, in the inner of which the sensor wires are located, and the outer one is equipped with a pipe connected to the annular gap between the inner and outer pipes, and a Laval nozzle is installed in the lower part between the pipes, through holes are made in the upper part of the inner pipe, and the outer pipe has a conical narrowing at the bottom.

The essence of the utility model is illustrated by the drawing, which schematically shows a General view of the device.

The device consists of two concentrically assembled pipes - inner 1 and outer 2. In the upper part of the outer pipe there is a pipe 3. In the inner pipe 1 there are wires 4 of the measuring unit 8. On the inner pipe 1 in the upper part there are through holes 5. In the lower part between pipes 1 and 2 have a Laval nozzle 6. The outer pipe bottom has a conical narrowing 7. The measuring unit 8 is connected to the inner pipe 1, for example, using a threaded connection 9.

The device operates as follows: compressed nitrogen through the pipe 3 is fed into the annular gap between the inner and outer pipes and, passing through it, cools the device. Through holes 5 in the inner pipe, nitrogen fills the cavity of the pipe 1 with the drive 4 of the measuring unit 8, creating a protective environment in it. Nitrogen, moving along the annular gap between the pipes 1 and 2, passes the Laval nozzle 6 and, lowering its temperature, cools the lower, most heat-stressed part of the device.

Next, the nitrogen passes through the lower conical part 7, which gives direction to the nitrogen, sent it to the measuring unit 8, protecting it from the effects of splash of slag, metal and high temperature.

At the Magnitogorsk Iron and Steel Works, the proposed device was manufactured and installed on converters 1,2,3. For cooling, nitrogen was used with a pressure of 1.0 MPa. The use of the device allowed to increase its explosion safety, as in the process as a cooler use

only nitrogen, thereby increasing the reliability of the device, decreased accidents, increased production, simplified the design and increased the life of the device.

Claims (1)

A device for measuring the parameters of liquid metal, including concentrically arranged outer and inner tubes, inside of which the wires of the measuring unit are located, and the outer one is equipped with a nozzle connected to the annular gap between the inner and outer tubes, characterized in that in the lower part between the inner and outer the pipes have a Laval nozzle, through holes are made in the upper part of the inner pipe, and the outer pipe has a conical narrowing at the bottom.