RU51208U1 - DEVICE FOR MEASURING TEMPERATURE AND OXIDATION OF METAL IN STEEL SINES - Google Patents

Abstract

A device for measuring the temperature and oxidation of metal in steelmaking furnaces relates to ferrous metallurgy, and more particularly to equipment for metrological support of technological processes of steelmaking. The technical task of the utility model is to increase the reliability of the device. In a device containing a measuring unit, a unit holder with conductive elements located inside, the unit holder contains two coaxially arranged pipes with the possibility of feeding compressed air into the gap between the pipes, a rod with a contact holder, a protective sleeve installed at the junction of the rod with the pipes, while the outer the pipe and protective sleeve are made of heat-resistant steel.

Description

A device for measuring the temperature and oxidation of metal in steelmaking furnaces relates to ferrous metallurgy, and more particularly to equipment for metrological support of technological processes of steelmaking.

During the steelmaking process, temperature and oxidation are measured by briefly immersing a measuring unit in the molten metal mounted on the device holder and connected via a measuring circuit to a device that records the measurement results. Two types of measuring units are used: temperature, measuring only temperature and universal, measuring both temperature and oxidation. Performing all measurements during melting by expensive universal blocks is impractical, therefore, if necessary, only temperature is measured using temperature blocks.

When performing measurements, the device introduced into the steelmaking furnace and immersed in molten metal is subjected to intense thermal radiation, causing the holder to warp and warp, and the measurement circuit cables to heat up and burn out. In this case, the effect of thermal radiation increases significantly in case of unsuccessful measurements, when the device that has not had time to cool is re-introduced into the furnace for measurement.

To ensure accurate measurement results, the design of the device for measuring the temperature and oxidation of the metal should provide resistance to high temperatures, the use of measuring units of various types, the possibility of mechanized entry into the steelmaking furnace in various ways: vertical, horizontal movements, as well as along a curved path, for example, through working window of the electric furnace.

A device (probe) for measuring the parameters of liquid metal [1], containing coaxially arranged pipes forming a water-cooled jacket, a head with a sensor.

The disadvantages of this device are: the ability to enter the furnace only along a vertical, linear path, the need for a bulky water cooling system.

The closest analogue of the claimed device is a device (thermal probe) for steel furnaces [2],

containing a refractory block with a thermocouple, a block holder, electrodes connecting a thermocouple to a recording device.

The disadvantage of the closest analogue is the low temperature resistance of the holder, which does not allow to obtain guaranteed measurement results.

The technical result of the utility model is to increase the reliability of a device for measuring the temperature and oxidation of a metal.

The technical result is achieved due to the fact that in a device for measuring the temperature and oxidation of metal in steel furnaces containing a measuring unit, a block holder with placed conductive elements, the block holder contains two coaxially arranged pipes with the possibility of feeding compressed air into the gap between the pipes, a rod with contact holder, a protective sleeve installed at the junction of the rod with the pipes, while the outer pipe and protective sleeve are made of heat resistant steel.

The drawings show: figure 1 is a side view of the device, figure 2 is a section aa, figure 3 is a remote element B, figure 4 is a remote element B.

The device includes a holder 1, containing coaxially arranged pipes 2 and 3, the gap between the pipes is provided by surfacing a. To the front end of the inner pipe 3

the holder is attached to the rod 4 with the contact holder 5, temperature 6 or universal 7 measuring units are mounted on the rod. At the junction of the rod with the inner pipe, a protective sleeve 8 is provided that covers the open portion of the rod when installing a universal measuring unit having a shorter seating surface than the temperature measuring unit. At the rear end of the holder 1, a sleeve 9 is installed with a cable connector 10. A cable 11 connecting the connector 10 and the contact holder 5 passes through the internal pipe of the holder and the rod 5. The device is installed in the gripper 12 of the feed mechanism to protect the holder and cable from thermal radiation in the gap between the pipes 2 and 3 of the holder 1, a compressed air supply is provided, which is carried out through the corner fitting 13, the hole b in the fixed capture jaw 14, the hole combined with it in the outer pipe 2 of the holder. To remove excess air pressure at the rear ends of the measuring units in the wall of the protective sleeve 8, a hole g.

The outer tube 2 of the holder and the protective sleeve 8 are made of heat-resistant steel. The device holder, depending on the method of entry into the steelmaking furnace, can have a rectilinear or complex shape. Figure 1 shows a device with a holder having a bend designed for mechanized entry into the furnace along a curved path, for example, through the working window of an electric steel furnace.

The device operates as follows.

The holder of the device is installed in the capture 12 of the mechanism for introducing the device into the furnace so that the holes b and c are aligned and the bend of the holder is in a vertical plane. Then the cable connector is connected, compressed air is supplied into the gap between the holder tubes, the corresponding measuring unit is mounted on the device rod. Then the device is mechanically introduced into the steelmaking furnace, while the measuring unit is immersed in the molten metal. After indicating the measurement results, the device is removed from the furnace. After changing the measuring unit, the device is again ready for operation.

The introduction of a device of this design can increase its reliability at high temperatures, as well as the use of measuring units of various types.

Information sources

1. USSR Certificate No. 1211301. C 21 C 5/30 publ. bull. No. 6, 1986

2. RF patent No. 2000871. B 22 D 2/00, publ. bull. No. 37-38, 1993

Claims (1)

A device for measuring the temperature and oxidation of metal in steel furnaces, comprising a measuring unit, a unit holder with conductive elements located inside, characterized in that the unit holder contains two coaxially arranged pipes with the possibility of feeding compressed air into the gap between the pipes, a rod with a contact holder, a protective sleeve installed at the junction of the rod with the pipes, while the outer pipe and the protective sleeve are made of heat-resistant steel.