RU208779U1 - Contact block of the rod of the spectrometric device - Google Patents

Abstract

A useful model of the contact block of the rod of a spectrometric device belongs to the field of metallurgy and is designed to connect an immersed spectral probe to the rod to provide direct spectral analysis of the chemical composition of the molten metal directly in the melting units. The contact block includes a dielectric housing with an axial hole for installing an optical head and a channel for supplying an inert gas to the immersion module, a docking fitting for hermetic connection of the immersion probe, and two V-shaped contact pads for connecting the electrodes of the spectrometer spark generator. The contact block provides the possibility of quick installation and replacement of submersible spectral modules on the rod of the system for measuring the chemical composition of molten metals. This ensures the tightness of their connection, the centering of the optical channel of the spectrometer and the reliability of the electrical connection of the electrodes of the submersible probe with the wires of the spark generator. 2 ill.

Description

In ferrous and non-ferrous metallurgy, to measure melt parameters in liquid metal - temperature, free oxygen and hydrogen content - special probes are used, which are immersed in the melt using hand-held metal rods or manipulators. To connect the electrical and pneumatic circuits of such probes, special contact blocks are installed at the end of the wand [1, 2, 3].

The rod contact block for the liquid metal temperature probe (“Positherm”) contains two electrical contacts of a coaxial design. The rod contact block for the probe for measuring free oxygen in liquid metal (“Celox”) contains four contacts for connecting an electrochemical cell and a temperature sensor. The rod contact block for the probe for measuring the hydrogen content (“Hydris”) in the metal melt contains a device for connecting the pneumatic system channel for purging the liquid metal with an inert gas [4].

The closest technical solution is the rod contact block for the probe of the Hydris system, which provides connection of its pneumatic system to the probe [5]. This contact block is chosen as a prototype. In this contact block for hermetic connection of the inert gas supply channel to the submersible probe, the wand contact block has a fitting, into which, when the probe is put on, its metal tubes with sealing rubber rings enter. However, this contact block does not provide an optical channel and electrical contacts, which does not allow it to be used to connect a spectral probe.

The purpose of creating a utility model is a technical solution for the design of the contact block of the rod of a spectrometric device for connecting a submersible spectral probe with optical and pneumatic channels, as well as with electrical contacts.

Figure 1 shows a general view of the design of the contact block attached to the tube rod.

Figure 2 shows drawings of the contact block rod in section in two projections.

This contact block includes:

1 - Trumpet of the wand;

2 - Transition coupling;

3 - Contact block housing;

4 - Protective glass plug;

5 - Docking fitting;

6 - Optical head;

7 - Focusing lens;

8 - Fiber optic cable;

9 - Protective glass;

10 - Inert gas supply channel;

11 - Contact V-shaped pads;

12 - Wires from the spark generator.

The body of the contact block 3 has a cylindrical shape of a given diameter and is made of a solid dielectric material. Caprolon can be used as such material.

A central hole is drilled in the body of the contact block 3, into which an optical head 6 with a focusing lens 7 is installed. the submersible probe is protected by quartz glass 9, which is hermetically installed in front of it and secured with a plug 4.

The supply of inert gas to the spectral probe is provided through a gas pipeline. This tube is connected to a special hole in the inert gas supply channel 10, drilled in the body of the contact block parallel to its axis. At the same time, to exclude gas flow turbulence, the outlet part of the inert gas supply channel is located at a certain angle (30…45°) to the axis of the contact block and goes into the zone of its central hole.

To connect the contact electrodes of the spectral probe to the spark generator, two diametrically located V-shaped grooves are cut on the side walls of the body of the contact block, into which electrically conductive (copper) contact pads 11 are installed. Wires 12 from the spark generator located in the tube of the wand 1 are connected to these pads. and laid in special holes in the body of the contact block. V-shaped cutouts of the contact pads are directed with their wide end towards the immersion probe and are a kind of "traps" for the pins of the contact electrodes of the immersion probe when it is put on the wand.

For hermetic connection of the spectral probe with the contact block, a special docking fitting 5 is used, which is hermetically installed in the outer end of the contact block body 3. The fitting has an inlet rounded on the inside, where the metal sleeve of the spectral probe with a rubber sealing ring enters. Thus, the tightness of the channel for supplying the inert gas to the spark chamber of the spectral probe is ensured.

At the end of the body of the contact block 3, a thread is cut to connect it to the metal pipe of the wand 1 using an adapter 2.

Thus, this contact block makes it possible to quickly install disposable immersion probes on the wand and connect them to the spectrometer for spectral analysis of the chemical composition of molten metals. This ensures the tightness of their connection, the centering of the optical channel of the spectrometer and the reliability of the electrical connection of the electrodes of the submersible spectral probe with the wires of the spark generator.

Sources used

1. https://sidermag.ru/contact-block

2. http://knowkip.ucoz.ru/publ/teplotekhnicheskie_izmerenija/izmerenie_temperatury_zhidkoj_stali_v_metallurgicheskom_proizvodstve/1-1-0-4

3. https://www.szenergo.ru/izmeritelnye-pribory/termopary/positherm

4. https://www.heraeus.com/de/hen/products_and_solutions_hen/steel/hydrogen_control/hydrogen_control.html

5. https://www.ktopoverit.ru/prof/description/24054-08.pdf

Claims (1)

The contact block of the rod of a spectrometric device used for immersing probes in molten metal to measure the parameters of liquid metal, characterized in that its cylindrical body is made of a dielectric material and contains two through holes, one of which is located along the central axis of the block and in which an optical a head with a focusing lens for a fiber-optic cable with a hermetically installed protective glass, and through another hole, an inert gas is supplied to the spectral probe from a gas pipeline attached to it, and the outlet channel of this hole is located in front of the protective glass at a gentle angle to the axis of the contact block and exits into zone of the docking fitting, which is installed on the outer end of the contact block and provides a tight connection between the contact block and the spectral probe, while on the side surface of the contact block body, two diametrically located V-shaped ducts, in which electrically conductive plates are installed, connected to the wires of the spark generator of the spectrometer through holes in the body of the contact block.

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