JPH02263158A - Probe for sampling and/or measuring temperature or the like of molten metal - Google Patents

Abstract

PURPOSE:To prevent the deposition of a base metal in the connecting part of a sub- lance and the probe by constituting a gas generating means consisting of a material which generate a gas at the time of a high temp. on the outer peripheral surface of a connecting cylinder and solidifying a molten metal when the molten metal sticks. CONSTITUTION:The connecting cylinder 17 is constituted of the gas generating means 19 which consists of the material to generate the gas at the time of the high temp., a metal solidifying means 20 which consists of a metallic material to solidify the molten metal when the molten metal sticks, and a sealing means 40 which crushes the above-mentioned metallic material by the pressing force of a shoulder part 7 of the sub-lance and comes into tight contact with the shoulder part 7 of the sub-lance. The gas is generated from the gas generating means 19 of the connecting cylinder 17 when the probe 5 is inserted into a converter by the syb-lance 4. The fine particles M1 of the molten metal suspending (spitting) in the converter 2 are bounded and retreated from the outer periphery of the connecting cylinder 17 by the generation of this gas. The fine grains M1 of the molten metal are, therefore, prevented from sticking to the connecting cylinder 17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a probe for collecting a sample of molten metal by immersing it in molten metal and/or for measuring temperature and the like.

[Conventional technology]

A sublance system is known as a method for measuring the temperature, etc., and components of a molten metal bath such as a steel bath during blowing. That is,
As shown in Figure 10, nine ordinary oxygen blowing lances 3 are lowered into the converter 2 housing the molten metal bath 1 to perform blowing into the molten metal bath, and another lance (sub-lance) is 4 is lowered and a probe 5 attached to the lower end of the sub-lance is immersed in the bath 1 during blowing, and the probe 5 measures temperature and takes samples.

As shown in FIGS. 11 to 13, the sub-lance 4 has a projection 6 at its lower end, and a shoulder 7 located above the projection 6 and having a large diameter. The probe 5 is provided with a sample collection and/or measurement section 9 also formed from a paper tube or the like at the lower end of a tube section 8 formed from two paper tubes, etc., in which a temperature sensor, an oxygen sensor, and a sample collection container are installed. etc. At the upper end of the tube portion 8 is a connecting tube 1 formed of a paper tube or the like.
0 is set. The work of attaching the probe 5 to the lower end of the sub-lance 4 is done mechanically. That is, with the probe 5 fixed, the sub-lance 4 is lowered from above the probe, and the protrusion 6 is press-fitted into the connecting tube 10.

When the projection 6 is inserted into the connecting tube 10, it is connected to a connector (not shown) in the probe 5.

Constitute an electrical connection by means of a plug and socket.

[Problem to be solved by the invention]

When the probe 5 is inserted into the converter 2 by the sublance 4, fine molten metal particles are floating (spitting) in the converter 2, so these molten metal particles are inserted into the probe 5.
and adheres to the outer peripheral surface of the sub-lance 4. Further, the inside of the converter 2 is filled with high-temperature atmospheric gas. Therefore, the outer peripheral surface of the connecting tube 10 of the probe 5 is burned by the molten metal fine particles 12 and the high temperature atmospheric gas. As a result of this combustion, the upper end edge of the connecting cylinder 10 is also burned, creating a gap 13 between it and the shoulder 7 of the sub-lance 4 (Fig. 11). etc. by.

In some cases, a gap 13 is already created when the probe is attached to the sub-lance. ) Next, when the sublance 4 is lowered and the sample collection and/or measurement part 9 of the probe 5 is immersed in the molten metal 1, the molten metal 1 is splattered, and the scattered molten metal is poured into the sublance 4 and the probe 5. Adheres to the outer surface. In addition, since the molten metal 1 during blowing is in a state of scattering (slopping) in the furnace, the molten metal 1 that is flying around is in the sublance 4.
and adheres to the outer peripheral surface of the probe 5. As a result, combustion of the above-mentioned connecting cylinder 10 is promoted and the gap 13 is expanded.

When the sub-lance 4 is raised and the probe 5 is pulled up from the converter 2 after collecting the sample and/or measuring the temperature, etc., the molten metal adhering to the outer peripheral surface of the sub-lance 4 hangs down and moves to the probe 5 side. and the gap 13
infiltrate. The molten metal expands the gap 13 when it enters, and then cools and solidifies to become the base metal 14 (FIG. 12).

As a result of filling the gap 13 with this metal 14,
A block metal portion 14a is formed to wrap around and cover the shoulder portion 7 of the sub-lance 4.

After the sublance 4 is lifted from the converter 2.

The probe 5 is removed, another new probe is attached, and the probe is inserted into the converter 2 again, and this operation is repeated thereafter. By the way, when removing the probe, when the connecting tube 10 of the probe 5 is pulled out from the protrusion 6 of the sub-lance 4, the above-mentioned lump metal portion 14a is attached to the shoulder portion 7 of the sub-lance.
Since it is attached so as to wrap around the shoulder part 7, it is not easily peeled off from the shoulder part 7, and remains on the shoulder part 7 side, separated from the base metal 14b solidified on the connecting tube 10 (FIG. 13).

If such a lump of metal 142 is allowed to remain attached to the sub-lance shoulder 7, it will be removed every time a sample is repeatedly collected and/or temperature, etc., are measured.

The adhered base metal 142 gradually grows and forms a large lump, and eventually it becomes impossible to attach a new probe to the sub-lance, that is, the electrical connection between the protrusion 6 and the connector (not shown) becomes impossible. It will make it possible.

[Means to solve the problem]

As a technique for preventing metal adhesion at the connecting part between the sublance and the probe, the present applicant has already developed
No. 67 was proposed. According to this, the connecting tube of the probe generates gas at high temperatures and is made of a material that remains as carbide after gas generation, so the molten metal particles in the above-mentioned spitting state are transferred onto the outer periphery of the connecting tube. It was confirmed that it can be expected to have a repelling effect and contribute to preventing the adhesion of molten metal. However, the burned material that remains as carbide after gas generation has a weak mechanical strength, so the sub-run may vibrate due to the impact of molten metal due to splashing or slopping, and may cause rotation during blowing. When the probe vibrates due to the intense flow of oxygen and oxygen reactant gas in the furnace, and furthermore, when the probe itself shakes due to the intense movement of the molten metal during blowing, the burnt material partially collapses and instantly explodes. It has been confirmed that an undesirable gap as described above is formed between the connecting tube and the sub-lance shoulder.

On the other hand, a device in which an elastic ring seal is interposed at the connecting portion between the sub-lance and the probe is known as Japanese Patent Application Laid-Open No. 60203856. However, such an elastic ring seal burns at high temperatures, and as a result, forms an undesirable gap as described above between the connecting tube and the sub-lance shoulder, so in the end, it is impossible to solve the above problem. Can not.

The present invention provides a probe for sampling molten metal and/or measuring temperature, etc., which solves the above-mentioned problems.The present invention is configured to provide a probe for sampling molten metal and/or measuring temperature, etc., which solves the above-mentioned problems. A probe for sampling and/or measuring temperature, etc., which is a cylindrical body into which a protrusion at the lower end of the sublance is inserted, and has a connecting tube with an upper annular edge facing the shoulder of the sublance above the protrusion. In the case where the connecting tube is provided on the outer peripheral surface of the tube, the gas generating means is made of a material that generates gas at high temperatures, and the connecting tube is made of a metal material that solidifies the molten metal when it is attached. The present invention is characterized in that a solidifying means is provided on the upper annular edge, and a sealing means is further provided for crushing the metal material by the pressing force of the local part of the sub-lance and bringing it into close contact with the local part of the sub-lance.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

In the present invention, the probe 5 is attached to the lower end of the tube section 16 formed by two paper tubes or the like as in the conventional example shown in FIG. (not shown), and a connecting cylinder 17 is provided at the upper end of the pipe portion 16. The sample collection and/or measurement section is equipped with a temperature sensor, an oxygen sensor, a sample collection container, and the like. A connector (not shown) is disposed within the connecting tube 17.

The sub-lance 4 includes the protrusion 6 and the shoulder 7 as described above. The probe 5 is mechanically attached to the sub-lance 4 by lowering the sub-lance 4 from above the probe 5 with the probe 5 fixed, and press-fitting the protrusion 6 into the connecting tube 17. The protrusion 6 is coupled with a connector (not shown) and electrically connected.

In the present invention, the connecting cylinder 17 includes a gas generating means 19 made of a material that generates gas at high temperatures, a metal solidifying means 20 made of a metal material that solidifies the molten metal when it is deposited, and a sub-balance shoulder 7. The gas generating means 19 constitutes a sealing means 40 which crushes the metal material by a pressing force and comes into close contact with the shoulder of the sub-lance (FIG. 1).
is configured at least on the outer peripheral surface of the connecting cylinder 17,
The metal coagulation means 20 and the sealing means 40 are arranged at least on the upper annular edge of the connecting tube 17 facing the sub-lance shoulder 7.

In the illustrated embodiment, the connecting cylinder 17 includes an inner cylinder 17a made of two paper tubes, which is inserted into the tube part 16 and fixed to the inner cylinder 17a.
The outer cylinder 17b made of a paper tube is inserted and fixed into the lower half of the inner cylinder 17a, and the gas generating means 19 is inserted into the upper half of the inner cylinder 17a.
Protective cylinder 1 equipped with metal coagulation means 20 and sealing means 40
7C is extrapolated and fixed.

As the material that generates gas at high temperature to constitute the gas generating means 19, for example, a synthetic rubber material such as chloroprene rubber, or a polymeric synthetic resin material such as phenol resin or urea resin can be used. .

The metal material for constituting the metal solidification means 20 that solidifies the molten metal when the molten metal is deposited can be arbitrarily selected from a large number of unspecified metal materials. For example, it is preferable to use SS material for molten metal such as pig or steel, and use SUS material for molten SUS metal.

Examples for forming the protective tube 17C are shown in FIGS. 6 to 9.

In FIG. 6, the protection tube 17c is made up of a plurality of layers of net members 41 stacked in the radial direction. This net body 41 is
The material is a covered wire 44 formed by covering a metal wire 42 with the above-mentioned high temperature gas generating material 43, and is formed by knitting and weaving this covered wire 44. This net body 41
The protection tube 17C has a metal net portion 41a in which the metal wire 42 is exposed at the upper edge of the core portion. That is, in this metal net portion 41a, the net body 41
Such a protective cylinder 17 does not have the covering material 43
c can be easily achieved by immersing a net body 41 made of a metal wire rod 42 in a molten bath of the above-mentioned high temperature gas generating material 43, and attaching the material 42 to only the metal net portion 41a of the net body 41. Can be manufactured. Thus, the protective cylinder 17c forms a gas generating means 19 on its outer peripheral surface using the coating material 43, and forms a metal solidifying means 20 and a sealing means 40 on its upper annular edge using the metal net portion 41a.

In FIG. 7, the protection tube 17c is composed of a plurality of layers of sheet bodies 45 stacked in the radial direction. This sheet body 45 is
It consists of a covering plate 48 formed by covering a metal sheet 46 with the above-mentioned high-temperature gas generating material 47, and has a large number of punched holes 49 as required. The protection tube 17c made of the sheet body 45 has a metal sheet portion 45a in which the metal sheet 46 is exposed at the upper edge of the core portion. That is, this metal sheet portion 45a does not have the coating material 47, and the metal sheet portion 45a has a notch 45b so as to be easily crushed when receiving the pressing force of the sub-lance shoulder.
In this case, the example in Figure 3 shows the metal sheet portion 45a standing upright, but it is preferably formed such that it is easily crushed into a bent shape by the pressing force of the sub-lance shoulder. Alternatively, the metal sheet portion 45a may be tilted upright toward the outer circumference or toward the inner circumference, or a large number of claw pieces formed on the metal sheet portion 45a through the notches 45b may be arranged in the direction in which the metal sheet portion 45a is arranged. , such a protection tube 17C may be configured such that claw pieces that stand up while tilting toward the outer circumference and claw pieces that stand up while tilting toward the inner circumference are arranged alternately. It can be easily manufactured by covering the sheet 46 with the material 47 except for the metal sheet portion 45a at the upper edge described above. Therefore, the protective tube 17C
5 Gas generating means 19 is provided on the outer peripheral surface by the coating material 47.
On the other hand, the metal sheet portion 45a constitutes the metal coagulation means 20 and the sealing means 40 at the upper annular edge.

In FIG. 8, the protective tube 17c is composed of a sheet 50 made of a material that generates gas at high temperatures, and a metal plate 51 superimposed on the inner circumferential side of the sheet 50. The metal plate 51 is the sheet 5
0, and further has a protrusion 51b standing up from the flange 51a. Projection 51b
It is preferable that the notch 51C etc. be formed so that it can be easily crushed when receiving the pressing force of the sub-lance shoulder. , the protrusion 51b may be tilted upward toward the outer circumference or the inner circumference, or a large number of claw pieces formed on the protrusion 51b via the notches 51c may be inclined toward the outer circumference with respect to the direction in which the protrusion 51b is arranged. A nail piece that stands up at an angle,
The protection tube L7c may be configured such that the claw pieces that are inclined toward the inner circumference and stand up are arranged alternately.
The sheet 50 constitutes the gas generating means 19 on the outer peripheral surface, while the protrusion 51b of the metal plate 51 constitutes the metal coagulation means 20 and the sealing means 40 at the upper annular edge.

In FIG. 9, the connecting cylinder 17 is an inner cylinder 17 consisting of nine paper tubes.
While the metal plates 52 are superimposed on the inner circumference of the inner cylinder 1
A sheet 53 made of a material that generates gas at high temperatures is placed on the outer periphery of 7a.
are placed in polymerization. The metal plate 52 has a flange 52a that covers the upper edge of the inner cylinder 17a, and a bent portion 5 that is formed in series on the flange 52a and extends in a tubular shape in the circumferential direction.
2b. Thus, the protective cylinder 17C constitutes the gas generating means 19 on the outer peripheral surface by the sheet 53, and constitutes the metal coagulation means 20 and the sealing means 40 at the upper annular edge by the bent portion 52b of the metal plate 52.

By the way, as described above, the sealing means 40 of the present invention has the following features:
It is sufficient that the metal material is crushed by the pressing force of the sub-lance shoulder 7, brought into close contact with the sub-lance shoulder 7, and prevents the free penetration of molten metal to some extent. Therefore, please understand that the word "seal" in this specification should not be interpreted in the strict sense of a seal, but in a broader sense, including cases where there are minute gaps in some parts. .

[For production]

When attaching the probe 5 to the sub-lance 4, with the probe 5 fixed, the sub-lance 4 is lowered from above the probe 5, and the protrusion 6 is press-fitted into the connecting tube 17.

Mechanical installation is performed. Since the downward pressing force of the sub-lance 4 is large, the sealing means 40 of the connecting cylinder 17 is crushed by the sub-lance shoulder 7.

During deformation due to this crushing, the sealing means 40 conforms to and comes into close contact with the surface of the sub-lance shoulder 7 due to plastic deformation of the metal material (Fig. 2). Therefore, even if the sub-lance shoulder 7 deforms irregularly due to wear. Even when the shoulder portion 7 and the connecting tube 17 are connected, no gap is created between the shoulder portion 7 and the connecting tube 17.

When the probe 5 is inserted into the converter 2 by the sub-lance 4, gas is generated from the gas generating means 19 of the connecting cylinder 17.

That is, in the case of synthetic rubbers such as the above-mentioned chloroprene rubber or polymeric synthetic resins such as phenol resins, they burn to generate gas, and after the gas generation, they remain as charred substances. Due to this gas generation, it floats in the converter 2 (spinning).
The fine molten metal particles M1 are repelled from the outer periphery of the connecting cylinder 17 (FIG. 3), so that the molten metal particles M1
is prevented from adhering to the connecting tube 17.

Next, by lowering the sub-lance 4, the probe 5
When the sample collection and/or measurement part is immersed in the molten metal, the molten metal is splashed, and the scattered molten metal adheres to the outer peripheral surfaces of the sublance 4 and the probe 5. Also,
Since the molten metal during blowing is in a slopping state in the furnace, the molten metal that jumps around the sublance 4 and the probe 5.
It adheres to the outer peripheral surface of. However, during this time, the connecting tube 17
Since the gas generating means 19 continues to generate gas, even if the molten metal once adheres to the connecting cylinder 17, it is immediately blown away by the gas and falls.

After collecting the sample and/or measuring the temperature, etc., the sublance 4 is raised and the probe 5 is pulled up from the converter 2.
The molten metal adhering to the outer peripheral surface of the sub-lance 4 hangs down and moves toward the probe 5 side. At this time, a gap is not formed between the sub-lance shoulder 7 and the connecting cylinder 17 as in the conventional case, and the sealing part 40 made by crushing the metal material is filled, so that the molten metal hanging down is not absorbed by the probe 5. By the way, the sublance may vibrate due to the impact of molten metal due to splashing or slopping, and during blowing, the sublance may vibrate due to the impact of molten metal due to splashing or slopping. The sublance 4 and the probe 5 are subjected to forces that cause them to deviate in opposite directions due to the vibrations caused by the flow and furthermore the probe itself oscillating due to the violent movement of the molten metal during blowing. Occasionally, a slight gap may be created between the seal portion 40 of the connecting tube 17 and the sub-lance shoulder portion 7. However, in the present invention, in the unlikely event that such a small gap occurs, even if the molten metal infiltrates the gap, the sealing means 40 formed by crushing the metal material At the same time, it functions as a metal solidifying means 20, and when the molten metal comes onto the means 20, it can be rapidly cooled and solidified.

When removing the probe 5 from the sub-lance 4 and replacing it with another new probe, when the connecting cylinder 17 of the probe 5 is pulled out from the protrusion 6 of the sub-lance 4, the connecting cylinder 1
The solidified ingot 15 on the outer periphery of the sub-lance 7 adheres to the connecting tube 17 and is peeled off from the sub-lance shoulder 7. Therefore.

There is no remaining metal in the sub-lance shoulder 7 as in the conventional case (Fig. 5).

If the protection tube 17c is configured as shown in FIGS. 6 and 7 above, the molten metal that hangs down and moves from the outer periphery of the sub-lance 4 to the outer circumferential surface of the protection tube 17C will be firmly fixed to the protection tube 17c. For example, in the embodiment shown in FIG. 6, the coating material 43 of the net body 41 constituting the protective tube 17c remains as a carbide after it is burnt by generating gas, but the sub-balance is 4 may vibrate due to the impact of molten metal due to splashing or slopping, or may vibrate due to the intense flow of oxygen and oxygen reaction gas in the converter during blowing, and the probe itself may vibrate due to the blowing. When the molten metal inside shakes due to violent movement, the residual carbide partially collapses and exposes the metal wire 42, so that the molten metal that hangs down adheres to the wire 42 and gets entangled in the net. It solidifies to form a lump of metal 15. Also.

In the embodiment shown in FIG. 7, the hanging molten metal gets entangled with the punched holes 49 of the sheet body 45 and adheres to the metal plate 46 to form the lump base metal 15.

Therefore, as described above, when the probe is pulled out from the sub-lance, the lump metal 15 follows the probe and is suitably peeled off from the shoulder of the sub-lance.

〔Effect of the invention〕

As a result of the above-described configuration, the present invention achieves the following effects.

(1) Gas is generated from the outer peripheral surface of the connecting cylinder 17 by the gas generating means 19.

It is possible to prevent molten metal from adhering to the connecting cylinder 17.

(2) A sealing means 4 is provided between the connecting cylinder 17 and the sub-lance shoulder 7 by crushing a metal material.
0, it is possible to reliably prevent molten metal that hangs down from the sub-lance to the probe from entering between the sub-lance shoulder 7 and the connecting cylinder 17 in an inserted manner.

(3) Even if the sealing means 40 is not sufficient.

Even in the unlikely event that a minute gap is created between the sealing means 40 and the sub-lance shoulder 7, the molten metal that attempts to enter the minute gap will be immediately removed by the metal solidification means 2° as soon as it comes onto the sealing means. It is cooled and solidified to prevent it from penetrating any further into the gap.

(4) For this reason, when pulling out the probe from the sub-lance, the lump metal 15 solidified on the connecting tube 17
is peeled off from the shoulder of the sub-lance following the direction of the probe, and does not remain attached to the shoulder of the sub-lance as in the conventional case.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing the main parts of one embodiment of the present invention, Fig.
Figure 1 is a vertical cross-sectional view of the probe mechanically attached to the sub-lance, Figure 3 is a vertical cross-sectional view of the probe receiving fine molten metal particles in the converter, and Figure 4 shows the molten metal on the outer periphery of the sub-lance. Vertical cross-sectional view of the state in which it hangs down and moves toward the probe side, No. 5
The figure is a vertical cross-sectional view showing the probe pulled out from the sub-lance, FIG. 6 is a cutaway perspective view showing the first embodiment of the protective tube constituting the connecting tube, and FIG. 7 is a cutaway perspective view showing the second embodiment of the same. 8 is a cutaway perspective view showing the third embodiment, FIG. 9 is a cutaway perspective view showing the fourth embodiment, and FIG. 10 is a longitudinal section showing the converter with the oxygen lance and sub-lance inserted. Fig. 11 is a partially vertical cross-sectional front view of a conventional probe attached to a sub-lance receiving molten metal fine particles in a converter, and Fig. 12 is a front view of a conventional probe attached to a sub-lance, and Fig. 12 shows the melting of the outer periphery of a sub-lance in the same conventional example. FIG. 13 is a vertical cross-sectional view showing a state in which the metal hangs down and moves toward the probe side. FIG. 13 is a vertical cross-sectional view showing a state in which the probe is pulled out from the sub-lance in the conventional example. DESCRIPTION OF SYMBOLS 1... Molten metal, 2... Converter, 3... Oxygen lance 4... Sublance, 5... Probe, 6... Protrusion, 7... Shoulder, 13... Gap , 15...Bulk metal, 16...Pipe portion, 17...Connecting tube, 17a...Inner tube, 17b...Outer tube, 17c...Protection tube, 19...
- Gas generating means 20...metal solidification means, 40... sealing means. ＼T Procedural amendment (voluntary) May 2, 1989 2゜3゜4゜1999 Patent Application No. 85103 Name of invention Case involving a person who corrects a probe for sampling molten metal and/or measuring temperature, etc. Relationship with (Patent Applicant) Kawaso Electric Industry Co., Ltd. Agent ■530 Address: 06-361-71126゜7゜Voluntary Detailed explanation of the invention in the specification subject to voluntary amendment Page 9 of the description of the contents of the amendment In the 4th line, correct "Connecting cylinder 1" to "Inside pipe section 16". within 7”

Claims (1)

[Scope of Claims] 1. A probe for collecting a sample of molten metal and/or measuring temperature, etc. by being attached to the lower end of a sub-lance, which is a cylindrical body into which a protrusion at the lower end of the sub-lance is inserted; A connecting tube provided at the top of the probe with an upper annular edge facing the sub-lance shoulder above the protrusion; wherein the connecting tube has a gas generating means made of a material that generates gas at high temperatures around the outer periphery of the tube. A metal solidifying means made of a metal material is configured on the upper annular edge to solidify the molten metal when the molten metal is deposited on the upper annular edge; 1. A probe for sampling molten metal and/or measuring temperature, etc., characterized by comprising a sealing means that is brought into close contact with the molten metal.