JPH0119091Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a molten metal temperature measuring and sampling device, and is particularly applicable to smelting furnaces such as AOD furnaces and converter furnaces where a strong stirring flow exists in the molten metal in high-temperature furnaces. molten metal temperature measurement and sampling device.

(Prior Art) A slag layer is formed on the surface layer of molten metal in refining furnaces such as AOD furnaces and converters, which becomes an obstacle when measuring molten metal.

For example, Japanese Utility Model Publication No. 52-52625 and Japanese Utility Model Application Publication No. 154461-1989 are known for attaching a protective device to the tip of a measuring probe to protect the temperature measuring element etc. when passing through a hard slag layer.

Furthermore, regarding a sample collection device in which a cylindrical sample of molten metal is introduced into a sample collection container through a channel protruding from the tip of a measurement probe, for example
−42093, Utility Model No. 56-29744, Utility Model Application No. 1987-
No. 12497 is known.

In refining furnaces such as bottom-blowing converters and AOD furnaces that blow from the bottom or side of the bottom of the furnace, a strong stirring flow occurs in the internal molten metal, such as molten steel.

While molten steel continues to react in this way at high temperatures,
The slag formed on the surface layer is not stirred as in a conventional top-blown converter, so it becomes a hard layer and covers the surface of the molten steel.

In order to measure temperature in such a furnace, it is necessary not only to take protective measures to prevent the temperature measuring element from being damaged by the hard slag layer, but also to prevent the temperature measuring element from being damaged or damaged by the strong stirring flow in the molten steel. Requires no bending.

In conventionally known techniques, protection of the temperature measuring element during measurement in a steel bath has not been considered.

In addition, in order to collect a cylindrical sample, it is commonly used to introduce an opening on the side of the measurement probe, but the paper tube that covers the opening or the paper tube that makes up the main body of the measurement probe burns and charcoal burns. It may become a substance and get mixed into the sample.

That is, there is a carbon pickup problem, and in order to avoid this problem, a method can be considered in which the sample introduction tube is made to protrude from the distal end surface without any intervening paper tube or the like.

However, in the prior art known for these methods, all suction means (mechanical suction or vacuum suction) are an essential requirement.

However, when using an automatic insertion device such as a sub-lance, using a suction means in combination not only complicates the equipment but also causes operational inconveniences, such as requiring the incorporation of sequence control for suction.

(Problems to be solved by the invention) The present invention solves the above problems, substantially protects the temperature measuring element, eliminates the need for special suction means, enables highly accurate temperature measurement, and produces high-quality The purpose of this invention is to provide a molten metal temperature measurement and sample collection device that can perform sample collection.

(Means for Solving the Problems) In order to achieve the above-mentioned objectives, the present invention includes a collection container housed at the tip of the main body, a collection chamber formed at the lower part of the collection container, and a collection chamber inside the collection chamber. a partition mounted on the top and having a hole; an inlet chamber formed above the partition and having an opening on a side; and a partition mounted on the side of the collection container with an upper bent portion thereof extending in the opening.
a substantially L-shaped sample introduction tube that is inserted into the inflow chamber with a gap in between and whose main part opens at the tip surface of the tip member of the main body; and a temperature measurement tube that is protruded from the tip surface of the tip member of the main body. an element, a protection tube surrounding the outer periphery of the side surface of the temperature measurement element, an inner cap surrounding the protection tube, and an inner cap surrounding the inner cap and the opening of the sample introduction tube and attached to the tip surface of the tip member of the main body. The present invention proposes a molten metal temperature measuring and sampling device consisting of a tapered outer cap.

(Function) The temperature of the molten metal is measured by the temperature detection element,
At this time, the temperature detection element is protected from the stirring flow of molten metal by the protective tube.

Further, the molten metal flows into the collection chamber through the sample introduction pipe and is collected, but at this time, the remaining air in the collection container is forced out of the main body through the gap between the openings of the inflow chamber.

(Example) The molten metal temperature measuring and sampling device of the present invention (hereinafter referred to as the device of the present invention) will be described below according to an example shown in the drawings.

FIG. 1 shows a device according to the present invention, which device 1 has a main body 2 made of a paper tube or the like, which is attached to a sublance.

A collection container 3 made of steel or the like is housed at the tip of the main body 2.

A collection chamber 5 is formed in the lower part of the collection container 3 as shown in FIGS. 2 to 4.

A partition 8 made of ceramics or the like and having holes 7 is installed above the collection chamber 5 (on the right side in FIG. 2).

An inflow chamber 6 is formed above the partition 8, and the inflow chamber 6 has an opening 9 on its side.

A sample introduction tube 12 made of quartz or the like and made of quartz or the like is installed in the main body 2 on the side of the collection container 3, which is formed into a substantially L shape and has a main portion and an upwardly bent portion.

The upwardly bent portion of the sample introduction tube 12 opens into the inflow chamber 6 with a gap 10 at the opening 9 .

Further, the main part of the sample introduction tube 12 is connected to the tip member 4 of the main body 2.
It has an opening on the tip surface.

The temperature measuring element 1 is supported by a support 15 made of a refractory material such as insulator on the front end surface of the tip member 4.
6 is provided protrudingly.

The temperature measuring element 16 is, for example, a thermocouple sealed in a quartz tube.

Further, the temperature measuring element 16 is surrounded on its side by a protective tube 18 made of quartz or the like.

Here, the tip of the protective tube 18 is connected to the temperature measuring element 1 so as not to adversely affect the temperature measured by the temperature measuring element 16.
It is desirable to set it back slightly from the tip of 6.

Next, the protective tube 18 is surrounded by an inner cap 19 made of metal or the like.

Further, the openings of the inner cap 19 and the sample introduction tube 12 are surrounded by an outer cap 20 made of metal or the like and formed into a tapered shape and attached to the distal end surface of the distal end member 4 of the main body 2.

The operation of the apparatus of the present invention shown in the above embodiments will be explained next.

That is, the device 1 is inserted into the furnace from the tip of the sub-lance with the base of the main body 2 attached.

This causes the outer cap 20 to break through the hard slag layer on the surface of the molten metal in the furnace.

At this time, even if the outer cap 20 is softened and deformed by heat, the temperature measuring element 16 is protected by the inner inner cap 19.

Next, when the tip reaches the molten metal, the outer cap 20 melts or falls off, and the inner cap 1
9 also melts down when it comes into contact with molten metal.

In this state, temperature is measured by the temperature measuring element 16, but the temperature measuring element 16 is connected to the protective tube 18.
protected from the agitating flow of molten metal.

On the other hand, molten metal flows from the opening of the sample introduction tube 12 into the inflow chamber 6 through its main portion and upper bent portion.

Residual air in the collection container 3 accompanying this is pushed out of the main body 2 through a gap 10 between the openings 9 and exhausted.

That is, molten metal can be collected into the inflow chamber 6 without using any special suction means.

Furthermore, since the sample introduction tube 12 opens at the tip end surface of the tip member 4 of the main body 2, there is no fear of contamination of carbides due to combustion of paper tubes, etc. that make up the main body 2.

The molten metal flows from the inlet chamber 6 into the collection chamber 5 after being rectified at the partition 8 .

Therefore, there is no necessity for molten metal to flow back and spill out of the collection chamber 5.

The solidified metal sample collected in the result collection chamber 5 is pulled up and used for analysis and the like.

(Effects of the invention) The embodiments of the molten metal temperature measuring and sampling apparatus of the invention are as described above, and the effects thereof are listed below.

(1) The device of the present invention has the configuration described in the claims for utility model registration, and in particular, because it has a protective tube that surrounds the outer periphery of the side surface of the temperature measuring element, the temperature measuring element can be protected from being destroyed by the stirring flow of molten metal. can take temperature measurements.

(2) The device of the present invention has the same configuration as above, and in particular, the upper bent portion is inserted with a gap at the opening of the inlet chamber, so there is no need to use special suction means to collect the molten metal.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway vertical sectional view of the device of the present invention;
Figure 2 is a partially cutaway perspective view of the tip of the same device;
FIG. 3 is a longitudinal cross-sectional view of the collection container shown above, and FIG. 4 is a front view of the opening portion of the same. 1: Device, 2: Main body, 3: Collection container, 4: Tip member, 5: Collection chamber, 6: Inflow chamber, 7: Hole, 8: Partition, 9: Opening, 10: Between, 12: Sample introduction tube , 15: Support, 16: Temperature measuring element, 18:
Protection tube, 19: inner cap, 20: outer cap.

Claims (1)

[Scope of utility model registration request] A collection container housed at the tip of the main body, a collection chamber formed below within the collection container, a partition installed above the collection chamber and having a hole, and an opening formed above the partition on the side. an inflow chamber that is attached to the side of the collection container, the upper bent part of which is inserted into the inflow chamber with a gap in the opening, and the main part of which is opened at the distal end surface of the distal end member of the main body; An L-shaped sample introduction tube, a temperature measuring element protruding from the distal end surface of the distal end member of the main body, a protective tube surrounding the outer periphery of the side surface of the temperature measuring element, an inner cap surrounding the protective tube; A molten metal temperature measuring and sampling device comprising an inner cap and a tapered outer cap surrounding the opening of the sample introduction tube and attached to the tip end surface of the tip member of the main body.