RU200353U1 - DEVICE FOR MEASURING MELT TEMPERATURE - Google Patents

Abstract

The utility model relates to the field of control and measurement technology, namely to devices for non-contact temperature measurement of molten materials. The device contains a refractory block made in the form of a replaceable attachment made of optically transparent material with a shoulder, a sleeve, a hollow rod, a lens, a hinge, a light guide, and a measuring unit. The problem is solved by using a clutch made of fireclay bricks and a refractory block with a shoulder, which simplify the design of the device. 2 ill.

Description

The utility model relates to control and measurement technology, namely to devices for non-contact temperature measurement of molten materials.

Known device [1] for measuring the temperature of molten substances, containing a light guide made of optically transparent refractory material, a radiation receiver and an optical line connecting the light guide to the receiver. A layer of a refractory optically opaque material with a known thermal emissivity is applied to the surface of the outer part of the light guide immersed in the melt; a hole in a cardboard tube, which in the process of measurement is put on a hollow metal rod with an optical line located inside it connecting the inner end of the optical fiber to the radiation receiver.

The disadvantage of this device is that the cardboard tube must be changed after each measurement. In addition, it is necessary to apply a layer of a refractory optically opaque material with a known thermal emissivity in the device.

Known device [2] for measuring the temperature of the melt, which forms a depression on the surface of the melt, which is a model of an "absolutely black body" (ABB) by immersing a refractory optically transparent rod into the melt, through which thermal radiation is transmitted to the meter. This device contains a light guide made of an optically transparent refractory material (sapphire or ruby), a thermal radiation detector and an optical line connecting the light guide to the receiver.

The closest to the proposed device is a device [3] containing a refractory block made in the form of a replaceable nozzle fixed on a hollow rod with a collet clamp, a lens, a light guide, as well as a fiber optic pyrometer and a hollow body (or quartz flask), which are immersed in the melt , in which the energy of thermal radiation from the walls of the hollow body is measured.

The disadvantage is the presence of a collet chuck. Collet chuck is a complex mechanical device, the operation of which depends on the thermal expansion of the clamping material. The use of a collet makes it difficult to change cores and makes it difficult to use in practice.

The task of the utility model is to simplify the design of the device.

In order to simplify the design, in the known device for measuring melt temperatures, instead of a collet clamp, a sleeve made of fireclay bricks is used, and the refractory block is made with a shoulder.

FIG. 1. shows the design of the proposed device, containing a refractory block 1 made of optically transparent material with a collar 2, a sleeve 3, a hollow rod 4, a lens 5, a hinge 6, a light guide 7, a pyrometer measuring unit 8.

The design of the interface between the refractory block and the hollow rod is shown in Fig. 2. Refractory block 1 having a collar 2 is fixed to a hollow rod 4 by means of a sleeve 3 made of refractory material, for example, fireclay bricks.

The device operates as follows, the refractory block 1 made of optically transparent material, for example, from sapphire in the form of a rod with a collar at its base, or in the form of a test tube with a collar at its base, is fixed on a hollow rod 4 using a coupling 3 made of refractory material, for example, from fireclay bricks, while the presence of a collar 2 simplifies the process of replacing the refractory block 1, since without additional operations it ensures the installation of the refractory block 1 on the hollow rod 4. On the opposite side of the hollow rod 4, a lens 5 that receives radiation from the melt, focused to the bottom of the depression in the melt formed by the refractory block 1. By means of the hinge 6, the angle of entry of the refractory block 1 into the melt is provided. The lens 5 is optically coupled by means of a light guide 7 with the measuring unit of the pyrometer 8, which makes it possible to install the electronic part of the pyrometer at a safe distance from the high-temperature surface of the melt. Thus, overheating and failure of the electronic elements of the measuring unit of the pyrometer 8 are excluded.

The use of the clutch makes it easy to change the refractory block and its reusability.

Sources of information

1. RF patent No. 189043, G01J 5/08, G01K 1/12, G01K 11/32, Publ. 05/07/2019, Bul. No. 13.

2. RF patent No. 2150091 C1, G01J 5/00, Publ. 27.05.2000.

3. RF patent No. 113836, G01K 13/00, G01J 5/08, Publ. 27.02.2012 Bul. No. 6.

Claims (4)

1. A device for measuring the temperature of the melt, including a refractory block made in the form of a replaceable nozzle, a pyrometer, a lens, an optical fiber, a hollow rod, characterized in that the refractory block is made of an optically transparent material with a shoulder at its base and fixed to the hollow rod with couplings. 2. A device for measuring the temperature of the melt, according to claim 1, characterized in that the refractory block is made in the form of a rod. 3. A device for measuring the temperature of the melt, according to claim 1, characterized in that the refractory block is made in the form of a test tube. 4. The device for measuring the temperature of the melt, according to claim 1, characterized in that the sleeve is made of refractory material.

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