JP2001296185A - Temperature measurement probe device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature measurement probe device for suppressing the breakage of a protection sleeve. SOLUTION: This temperature measurement probe device is composed of a probe 1 for measuring temperature that has a protective pipe 2 formed by a heat-resistance material and a temperature detection part 3 that is fitted to the tip of the protection pipe 2, and a protective sleeve 7 formed by a heat- resistance material for surrounding the outer-periphery surface of the protection pipe 2, while exposing the tip of the protective pipe 2. A plurality of reinforcing members 11 are embedded along the longitudinal direction of the protective sleeve 7 in the protective sleeve 7. Even if an external load, such as bending moment acts on the protection sleeve 7, the bending loss of the protection sleeve 7 can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a molten metal (for example, iron-based)
The present invention relates to a temperature measuring probe device for measuring the temperature of a temperature measuring object such as a temperature measuring object.

[0002]

2. Description of the Related Art The prior art will be described by taking a temperature measuring probe device for measuring the temperature of molten metal as an example. This type of temperature measuring probe device has a temperature measuring probe having a protective tube formed of a heat-resistant material and a temperature detecting section provided at the distal end of the protective tube, and a temperature measuring probe for measuring the temperature at the distal end of the protective tube. And a protective sleeve formed of a heat-resistant material that surrounds the outer peripheral surface of the protective tube while exposing the protective sleeve.

When a protective tube having a temperature measuring function reacts with the atmosphere on the surface of the molten metal, the protective tube deteriorates and the life of the protective tube is shortened. In addition, the vicinity of the surface of the molten metal has a large abrasion force, and the protection tube tends to deteriorate. For this reason, in the above-described temperature measuring probe device, the outer peripheral surface of the protective tube is surrounded and protected by the protective sleeve formed of a material having excellent heat resistance. As a result, the durability of the protective tube having a temperature measuring function is improved, and the life thereof is extended.

[0004]

However, the protective sleeve may be broken during use. Factors of breakage include the fact that an external load such as a bending moment acts on the protective sleeve with the flow of the molten metal, and carelessness of the user.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a temperature measuring probe device which is advantageous for suppressing breakage of a protective sleeve.

[0006]

A temperature measuring probe device according to the present invention includes a temperature measuring probe having a protective tube formed of a heat-resistant material and a temperature detecting portion provided at a tip portion of the protective tube. In the temperature measuring probe device, which is made of a heat-resistant material that surrounds the outer peripheral surface of the protective tube while exposing the distal end portion of the protective tube, the inside of the protective sleeve includes:
A plurality of reinforcing members are embedded along the length of the protective sleeve.

Even if an external load such as a bending moment acts on the protective sleeve, the protective sleeve is reinforced by the reinforcing member, so that breakage of the protective sleeve can be suppressed.

[0008]

According to the present invention, a plurality of reinforcing members are embedded inside a protective sleeve along the length of the protective sleeve. The number of reinforcing members can be appropriately selected, for example, about 2 to 20, about 3 to 10,
The number can be set to about 7, but is not limited to this. The reinforcing member can be formed of at least one of a bar, a wire, a twisted wire, and a pipe. The twisted wire is formed by winding a plurality of wires in a multiplex manner so as to twist the wires. The cross-sectional shape of the reinforcing member may be a circular shape such as a circle or an ellipse, or a rectangular shape such as a triangle, a square, a hexagon, or a star. Although the material of the reinforcing member varies depending on the type of the temperature measuring probe device, for example, carbon steel, alloy steel (including stainless steel), titanium alloy, or the like can be used.

[0009] The reinforcing member may have an air cooling passage through which cooling air is passed to cool the protective sleeve from the inside. In the cross section along the center axis of the protective sleeve,
The reinforcing member can be formed by bending into a U-shape. In this case, one of the one end and the other end of the U-shape is an air supply port, and the other of the one end and the other end of the U-shape is an air outlet.

According to the present invention, it is possible to provide a metal fitting for covering the base end of the protective sleeve opposite to the temperature detecting portion. In this case, it is preferable that the metal fitting and the reinforcing member overlap in the axial direction. According to the present invention, in the cross section of the protective sleeve, a region where the density of the reinforcing member is higher than other regions can be provided. This region enhances the reinforcing effect. Recognition means can be provided to allow the user to recognize the position of a region where the density of the reinforcing member is higher than the other regions.

As will be understood from the following description, the protective sleeve may be provided with a small-diameter distal end, a large-diameter trunk, and a small-diameter proximal end on the side to be immersed in series. The reinforcing member may be embedded only in the base end of the protective sleeve, may be embedded in the base end and the trunk of the protective sleeve, or may be embedded in the base end and the trunk of the protective sleeve. , May be buried at the tip.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment will be described with reference to FIGS. The temperature measurement probe device according to the present embodiment,
It comprises a probe 1 for temperature measurement and a protective sleeve 7. A probe 1 for temperature measurement includes a bottomed protection tube 2 having a bottom wall 2c, and a temperature detection unit 3 provided at the tip of the protection tube 2.
With The protective tube 2 is made of a cermet material (Mo-Z) as a heat-resistant material in order to secure both heat conductivity and heat resistance.
rO ₂ ).

The bottom wall 4c is provided in the cavity 2a inside the protection tube 2.
Is coaxially inserted. The insulating tube 5 is inserted into the cavity 4 a of the bottomed tube 4. In the insertion holes 5a and 5c formed so as to run in parallel with each other in the insulating tube 5,
Thermocouples 6, 6 are inserted. The tips of the thermocouples 6, 6 are connected to each other to form a temperature detecting unit 3.

A terminal head 9 provided with signal wiring and the like is provided above the protective tube 2 via a metal fitting 8. The terminal head 9 has a protruding connecting portion 9x oriented in a predetermined direction for connection with a counterpart material. Hardware 8
Is made of a heat-resistant metal such as stainless steel, and includes a disk body 8a and a metal cylindrical wall 8c coaxial with the protective sleeve 7. Stop hole 8e of cylinder wall 8c
The protective sleeve 7 is prevented from being detached from the metal fitting 8 by the fitting 8w inserted through the fitting 8w.

The protective sleeve 7 is made of a refractory material, which is a heat-resistant material, and has a small-diameter tip portion 7 immersed in a molten metal.
a, a thick and thick body portion 7c corresponding to the position of the molten metal surface W at the time of immersion, and a small-diameter base end portion 7e which is not immersed in the molten metal in normal use are provided in series. The temperature detecting section 3 is provided at a position protruding forward beyond the tip 7a of the protective sleeve 7. The temperature measurement is taken into account.

As the refractory material constituting the protective sleeve 7, one or more of alumina, alumina-carbon, magnesia, magnesia-carbon, silicon carbide, silicon carbide-carbon and the like can be employed. In the inside of the protective sleeve 7, a plurality of (6)
The metal (for example, one of carbon steel, alloy steel, and stainless steel) reinforcing member 11 is integrally embedded. The reinforcing member 11 can be subjected to a hardening treatment as necessary to enhance the reinforcing property. For example, it can be quenched or carburized. However, if not necessary, the hardening treatment may not be performed.

The reinforcing member 11 is formed of a rod or a wire having a circular cross section. As shown in FIG. 2, the plurality of reinforcing members 11 are distributed at substantially equal intervals in the circumferential direction inside the protective sleeve 7. The reinforcing members 11 are not connected to each other but are independent. FIG.
As shown in the figure, the distal end 11s of the reinforcing member 11 reaches the thick body 7c of the protective sleeve 7. Reinforcement member 1
The base end 11f of the first member 11 is applied to the board 8a of the metal fitting 8 and is in contact therewith. In some cases, the base 1 of the reinforcing member 11
A clearance may exist between 1f and the board 8a of the metal fitting 8. As shown in FIG.
In the cross section along the center axis of the cylinder wall 8c of the metal fitting 8
And the reinforcing member 11 overlap in the axial direction.

The axial length of the cylindrical wall portion 8c of the metal fitting 8 is L
Assuming that the inner diameter of the cylindrical wall portion 8c of the metal fitting 8 is D, L / D
= 0.5 to 2.0. The diameter of the reinforcing member 11 is d, and the thickness of the proximal end 7e of the protective sleeve 7 is t.
Then, d ≦ t can be satisfied. However, it is a matter of course that the present invention is not limited to the above relational expression.

In use, the tip of the protective tube 2 is immersed in a high-temperature molten metal such as steel. Then, the temperature detector 3 detects the temperature of the molten metal. Since the melt flows during temperature measurement,
A bending moment acts on the protective sleeve 7, but since the protective sleeve 7 is reinforced by the reinforcing member 11, breakage of the protective sleeve 7 is suppressed. Even if a crack occurs in the protective sleeve 7, a partial drop of the protective sleeve 7 can be suppressed by the reinforcing action of the reinforcing member 11. Therefore, the durability and the life of the protection sleeve 7 can be improved, and the life of the protection tube 2 having a temperature measurement function can be prolonged.

(Second Embodiment) FIG. 3 shows a second embodiment.
The temperature measurement probe device according to the present embodiment has basically the same configuration as that of the first embodiment, and has the same operation and effect. The following description focuses on the differences. Also in this embodiment, a plurality of metal reinforcing members 11B are embedded inside the protective sleeve 7 along the length direction of the protective sleeve 7. The distal end 11 s of the reinforcing member 11 </ b> B penetrates around the thick body 7 c of the protective sleeve 7 and reaches near the distal end 7 a of the protective sleeve 7.

(Third Embodiment) FIG. 4 shows a third embodiment.
The temperature measurement probe device according to the present embodiment has basically the same configuration as that of the first embodiment, and has the same operation and effect. The following description focuses on the differences. Also in this embodiment, a plurality of metal reinforcing members 11 </ b> C are embedded inside the protective sleeve 7 along the length direction of the protective sleeve 7. Each reinforcing member 11C is connected to each other along the circumferential direction by a ring-shaped reinforcing connecting member 13 along the circumferential direction.

(Fourth Embodiment) FIGS. 5 and 6 show a fourth embodiment. The temperature measurement probe device according to the present embodiment has basically the same configuration as that of the first embodiment, and has the same operation and effect. The following description focuses on the differences. Also in the present embodiment, the reinforcing member 11D has a pipe shape, and has a circular cross section. The pipe hole of the reinforcing member 11 </ b> D is an air cooling passage 14 that allows air to pass through and cools the protective sleeve 7 from the inside thereof. In a cross section along the central axis of the protective sleeve 7, this reinforcing member 11D
One end of the U-shape is an air supply port 15 and the other end of the U-shape is an air outlet 16. Also in this embodiment, the reinforcing member 1 having a pipe hole is used.
Since the protective sleeve 7 is reinforced in 1D, the reinforcing member 11D is reduced in weight by the pipe hole, while the protective sleeve 7 is reinforced.
Can be suppressed. Therefore, the durability and the life of the protection sleeve 7 can be improved, and the life of the protection tube 2 having the temperature measuring function can be prolonged. Further, if necessary, by connecting the air supply port 15 of the reinforcing member 11D to an air source 18, air can be supplied to the air-cooling passage 14, and the protection sleeve 7 is cooled from the inside and the high temperature of the protection sleeve 7 Can be suppressed. Thereby, the deterioration of the protective sleeve 7 can be further suppressed. Further, if air is supplied to the air cooling passage 14, the temperature of the reinforcing member 11D itself can be suppressed from becoming high, so that the strength of the reinforcing member 11D can be secured and the durability of the protective sleeve 7 is further improved.
Therefore, the reinforcing member 11 is required to secure the thickness of the protective sleeve 7.
Even if the diameter size of D is reduced, the reinforcing effect by the reinforcing member 11D can be secured.

(Fifth Embodiment) FIG. 7 shows a fifth embodiment.
The temperature measurement probe device according to the present embodiment has basically the same configuration as that of the first embodiment, and has the same operation and effect. The following description focuses on the differences. Also in this embodiment, as shown in FIG. 7, a plurality of metal reinforcing members 11 </ b> E are embedded inside the protective sleeve 7 along the length direction of the protective sleeve 7. In the present embodiment, as shown in FIG. 7, a high-density region 20 in which the density of the reinforcing member 11E is higher than other regions is provided in the cross section of the protective sleeve 7. It is preferable that the high-density regions 20 face each other in a direction in which an external load acts. That is, when the molten metal flows from the direction of the arrow N1, the high-density region 20 faces the direction of the arrow N1. Thereby, the durability of the protective sleeve 7 against the bending moment can be increased.

Since the high-density region 20 is buried inside the protective sleeve 7, the position of the high-density region 20 is difficult for a user to determine. In this respect, in the present embodiment, the protruding connecting portion 9x of the terminal head 9 described above is
It points to the 0 side, and indicates the position where the high-density region 20 exists. Therefore, the protruding connecting portion 9x of the terminal head 9
Can function as recognizing means for recognizing the user of the position of the high-density region 20 in the circumferential direction.

(Sixth Embodiment) FIG. 8 shows a sixth embodiment.
The temperature measurement probe device according to the present embodiment has basically the same configuration as that of the first embodiment, and has the same operation and effect. The following description focuses on the differences. Also in this embodiment, a plurality of metal reinforcing members 11 </ b> F are embedded inside the protective sleeve 7 along the length direction of the protective sleeve 7. A net 25 is coaxially embedded in the protective sleeve 7 in a cylindrical shape. The portion of the protective sleeve 7 is inserted into the mesh 25m of the mesh body 25, so that the joining property is secured.

(Seventh Embodiment) FIG. 9 shows a seventh embodiment.
The temperature measurement probe device according to the present embodiment has basically the same configuration as that of the first embodiment, and has the same operation and effect. The following description focuses on the differences. Also in this embodiment, the reinforcing member 11 having a short length is provided inside the protective sleeve 7.
G, a long reinforcing member 11H is embedded. The reinforcing members 11G and 11H are integrated into one set in a state of being bundled by welding or a wire, and a plurality of sets are embedded in the protective sleeve 7 at substantially equal intervals. As shown in FIG. 9, the reinforcing members 11G and 11H constituting one set
They are arranged side by side in the circumferential direction of the protective sleeve 7. Thereby, the reinforcing effect can be enhanced while securing the thickness t of the sleeve portion of the protective sleeve 7 in which the reinforcing members 11G and 11H are embedded.

Although not shown, the short reinforcing member 11G has reached the vicinity of the body 7c of the protective sleeve 7, but the long reinforcing member 11H has passed through the body 7c of the protective sleeve 7. Then, it reaches the vicinity of the distal end portion 7a of the protective sleeve 7. It should be noted that not only two, but also three sets, four sets, etc., of one set,
It may be buried inside.

(Eighth Embodiment) FIG. 10 shows an eighth embodiment. The temperature measurement probe device according to the present embodiment has basically the same configuration as that of the first embodiment, and has the same operation and effect.
The following description focuses on the differences. Also in the present embodiment, as shown in FIG. 10, a pipe-shaped reinforcing member 11L having a pipe hole 32 is provided in a pipe hole 30 of a pipe-shaped reinforcing member 11K via a spacer 39 (for example, a granular material). It is inserted almost coaxially. The pipe hole 30 of the reinforcing member 11K is one of an air supply port and an air discharge port. Pipe hole 3 of reinforcing member 11L
2 is the other of the air supply port and the air discharge port. Since the air cooling passage can be formed by the pipe holes 30 and 32, the protective sleeve 7 can be cooled from the inside while the reinforcing effect of the protective sleeve 7 is secured.

In addition, the present invention is not limited to the embodiment described above and shown in the drawings. The material and the like are not limited to the above-described case. The present invention can be applied to the case of measuring the temperature of the atmosphere, for example, by appropriately changing as necessary.

[0030]

According to the present invention, since the protective sleeve is reinforced by the reinforcing member, breakage of the protective sleeve is suppressed. Therefore, it is possible to improve the durability and extend the life of the protective sleeve, and to extend the life of the protective tube having the temperature measuring function.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a temperature measuring probe device.

FIG. 2 is a cross-sectional view of the protective sleeve.

FIG. 3 is a longitudinal sectional view according to another embodiment.

FIG. 4 is a cross-sectional view according to another embodiment.

FIG. 5 is a longitudinal sectional view according to another embodiment.

FIG. 6 is a cross-sectional view according to another embodiment.

FIG. 7 is a cross-sectional view according to another embodiment.

FIG. 8 is a cross-sectional view according to another embodiment.

FIG. 9 is a cross-sectional view according to another embodiment.

FIG. 10 is a cross-sectional view according to another embodiment.

[Explanation of symbols]

In the figure, 1 is a probe, 2 is a protection tube, 3 is a temperature detector, 7
Is a protective sleeve, 11 is a reinforcing member, 14 is an air cooling passage, 1
5 indicates an air supply port, 16 indicates an air discharge port, and 20 indicates a high density area.

Claims (7)

[Claims] 1. A temperature measuring probe having a protective tube formed of a heat-resistant material and a temperature detecting unit provided at a distal end of the protective tube, and the protective tube exposing the distal end of the protective tube. And a protective sleeve formed of a heat-resistant material surrounding the outer peripheral surface of the protective sleeve. A plurality of reinforcing members are embedded inside the protective sleeve along a length direction of the protective sleeve. A temperature measuring probe device. 2. The method according to claim 1, wherein the reinforcing member is a bar,
A temperature measuring probe device formed of at least one of a wire, a twisted wire, and a pipe. 3. The temperature measuring probe device according to claim 1, wherein the reinforcing member has an air cooling passage through which air passes to cool the protective sleeve. 4. The protection member according to claim 3, wherein the reinforcing member is bent in a U-shape in a cross section along a center axis of the protection sleeve, and one end of the U-shape is provided. A temperature measurement probe device, wherein one of the other ends is an air supply port, and the other of the U-shaped one end and the other end is an air discharge port. 5. The at least one of claims 1 to 4, further comprising a metal fitting for covering a base end of the protective sleeve opposite to the temperature detecting portion, wherein the metal fitting and the reinforcing member are provided. Is a temperature measuring probe device characterized by overlapping in the axial direction. 6. The measurement according to claim 1, wherein a region where the density of the reinforcing member is higher than other regions is provided in a cross section of the protective sleeve. Hot probe device. 7. The at least one of claims 1 to 6, wherein a region where the density of the reinforcing member is higher than another region is provided, and the density of the reinforcing member is higher than that of the other region. A temperature measuring probe device comprising a recognition unit for allowing a user to recognize a position of a high region.