JPH0120056Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a device that continuously measures the temperature of a moving object, such as a moving slab (hereinafter simply referred to as a slab) in a continuous casting and rolling process, and more specifically, the rolling pressing force of the rolls that press and guide the slab. The present invention relates to a temperature measurement device suitable for embedding the sheath tip in the surface layer of a cast slab using the following method. Conventionally, as a method for continuously measuring the temperature of slabs, there is a method described in Japanese Patent Publication No. 41434/1983. The temperature measuring device used in the method of the invention is a sheathed thermocouple with a microscopic metal plate for welding the surface of the slab connected to the sheath tip, and the microscopic metal plate is welded using an electric welding device. , it was previously welded to the surface of the slab and then simply pushed into the surface layer of the slab using guide rolls. However, the surrounding environment is high and complex, and the distance between the rolls is narrow, such as when producing cast slabs.
Under adverse conditions, such as when the slab surface is covered with an oxide layer that inhibits welding properties, it is difficult to reliably weld the micro metal plates to the slab surface, resulting in poor welding. Small metal plates that are easily welded and incompletely welded are not equipped with any means to prevent them from separating, so even if they are pushed into the surface layer of the slab by the rolls, they easily separate, resulting in accidents where continuous temperature measurement is not possible. However, there were problems with temperature measurement as it was not possible to grasp the temperature drop pattern at each part of the slab, such as by re-gathering the data. The present invention solves the problems of the conventional temperature measuring device described above, and does not require any means such as welding the metal plate located at the tip of the temperature measuring device to the surface of the object to be measured in advance. Using the rolling pressure of the rolls that press against the surface of the object to be measured, the tip of the sheath is buried within the surface layer of the object to be measured to prevent it from coming off, making stable continuous temperature measurement possible. The purpose of this invention is to provide a temperature measuring device for cast slabs made of
The purpose of this device is to provide a temperature measuring device for slabs that prevents damage to the sheath by preventing excessive shear stress from acting on the sheath when buried. Temperature of a moving object characterized in that a substantially spherical metal piece with a mounting insertion hole is connected to the tip of a temperature measuring means of a type thermocouple via a metal tube for protecting the temperature measuring means. Located in the measuring device. That is, the temperature measuring device for a moving object according to the present invention includes a temperature measuring means 1 such as a sheathed thermocouple, and a substantially spherical metal connected to the tip of the temperature measuring means 1 via a metal tube for protecting the temperature measuring means. FIGS. 1 to 6 show examples of combinations of these temperature measuring means 1 and a substantially spherical metal piece 2, and FIG. 1 shows a substantially spherical metal piece 2. The one using a perfect round sphere as
Figure 2 shows an example using an elliptical sphere, Figure 3 uses an oval sphere, Figure 4 uses a sphere with a polyhedral surface, and Figure 5 shows a combination of a sphere and a polyhedron. Fig. 6 shows one using a spherical metal piece whose surface has an uneven surface such as a rock surface. What is shown as 1 in each of these figures is this approximately spherical metal piece 2.
It is a temperature measurement means that is connected to the FIG. 7 shows an example of how the substantially spherical metal piece 2 and the temperature measuring means 1, such as a sheathed thermocouple, are connected to each other. That is, a sheath 4 covering a predetermined length of a metal tube 7 for protecting the temperature measuring means is inserted into a through hole 3 formed in the diameter direction of the metal piece 2, and the sheath 4 and the metal tube 7 for protecting the temperature measuring means are inserted. and the inner wall of the through hole 3 are integrally welded together at their tips. After insertion, one end of the metal tube 7 for protecting the temperature measurement means protrudes a certain length from the rear end side of the through hole 3. Further, the rear end edge 6 of the through hole 3 is chamfered into a round shape or expanded.
By doing this, it becomes possible to reduce the impact on the metal tube 7 for protecting the temperature measuring means when the metal piece 2 is buried in the surface layer of the slab, and it is possible to reduce the impact on the metal tube 7 for protecting the temperature measuring means. Protects the inserted sheath.
In the illustrated example, the metal tube 7 for protecting the temperature measuring means is inserted over the entire length of the through hole 3, but the method of interposing the metal tube 7 for protecting the temperature measuring means between the metal piece 2 and the sheath 4 is Other methods may also be employed. In addition, through hole 3
The chamfering applied to the rear end edge is the protective metal tube 7.
When the protective metal tube 7 is inserted into the through hole 3, it is preferable to provide it for the purpose of alleviating the impact on the protective metal tube 7 during embedding, but it is not necessarily necessary in other cases. Therefore, the temperature measuring device for a moving object according to the present invention for measuring the temperature of a hot slab according to the present invention is as follows:
8 and 9 show how to use it. The method of use shown in FIG. 8 is to press the perfectly spherical metal piece 2 located at the tip of the sheath 4 onto the surface of the slab 8 near the roll entrance of the roll 9, or directly or as appropriate. The sheath 4 is embedded in the surface layer of the slab 8 by using the rolling pressure force of the roll 9, and the tip of the sheath 4 is placed at a predetermined position within the surface layer of the slab 8. It is something that guides. At this time, since the metal piece 2 has a spherical shape, it is easily bitten by the roll at a predetermined position on the surface of the slab 8 from any direction and under the same conditions, and is pressed and securely inserted into the surface layer of the slab. It will be buried in the Also, the metal piece 2 is rolled into a cast piece 8 by a roller.
Because it is pushed inside, metal pieces 2 are removed when buried.
Shearing stress acts on the connection between the sheath 4 and the sheath 4, but since the temperature measuring means protection metal tube 7 exists between the sheath 4 and the metal piece 2, this shear stress is absorbed by the protection metal tube 7. This can prevent damage to the sheath 4. Moreover, the metal piece 2 after being buried
As shown in Fig. 9, the upper half is the slab surface layer 1.
0 and is mechanically prevented from moving upward, that is, coming out, so there is no risk of it coming off from inside the slab 8, and the tip of the sheath is deeply inserted into the inside of the metal piece. In addition, the edges of the through-hole are chamfered, so even if vibration or tension is applied to the sheath as the slab moves, the impact on the metal tube for protecting the temperature measuring means is alleviated, so the sheath and metal There is no fatigue in the connection part between the pieces. Therefore, the temperature of the slab 8 can be measured stably and continuously. The test results obtained in actual operation using the device of the present invention having the above-mentioned configuration are used as a comparative example, and the results obtained using the conventional method are also listed in the table below.

[Table] From this table, it is clear that the device according to the present invention has an extremely high temperature measurement success rate, whereas the conventional method has only a low success rate. It has become clear that welding of minute metal plates to cast slabs is difficult and definitely causes problems. As described above, in the temperature measuring device for a moving object according to the present invention, when the approximately spherical metal piece connected to the sheath tip is bitten by the roll and buried together with the sheath tip in the surface layer of the slab, The metal piece has a shape that allows it to be bitten into the roll and buried under almost the same conditions. Therefore, the temperature of the slab can be stably and continuously measured, the installation workability is also good, and it has excellent functions and effects. Moreover, since the metal tube for protecting the temperature measuring means is interposed between the sheath and the metal piece, the shear stress acting on the connection area between the sheath and the metal piece when buried is relaxed and the sheath is not damaged.
To connect the sheath and the metal piece, simply insert the sheath tip into the metal piece's mounting insertion hole, and use appropriate means such as caulking or welding to secure the sheath tip and the inner wall of the mounting insertion hole. Not only is it easy to connect the sheathed thermocouple and the metal piece, but it is also possible to assemble a temperature measuring device for a moving object by making the sheathed thermocouple and the metal piece separately and connecting them when necessary. A sheathed thermocouple can be used. In addition, by making the surface of the temperature measuring device rock-like or multifaceted spherical, it becomes easier to be caught by the roll, and the prevention effect becomes even better.

[Brief explanation of drawings]

1 to 6 show various embodiments of the temperature measuring device according to the present invention. FIG. 1 is a front view of an embodiment using a perfectly circular metal piece, and FIG. FIG. 3 is a front view of an example using an egg-shaped metal piece, FIG. 4 is a front view of an example using a polyhedral spherical metal piece, and FIG. 5 is a front view of an example using a spherical metal piece. A front view of an example using a spherical metal piece with a polyhedral surface, Fig. 6 is a front view of an example using a spherical metal piece with an uneven surface, and Fig. 7 shows a metal piece and temperature measurement. Cross-sectional explanatory diagram showing a state in which the means are connected, No. 8
The figure is an explanatory diagram showing a state in which the temperature measuring device of the present invention is embedded in a moving object, and FIG. 9 is a cross-sectional explanatory diagram showing a state in which the temperature measuring device of the present invention is embedded in the surface layer of a moving object. 1: Temperature measuring means, 2: Metal piece, 3: Through hole, 4:
Sheath, 5: Welding, 6: Mouth rim, 7: Metal tube for protecting the temperature measuring means, 8: Slab, 9: Roll, 10: Surface layer of the slab.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A substantially spherical metal piece with an insertion hole for attachment is inserted into the tip of the temperature measuring means of a sheathed thermocouple through a metal tube for protecting the temperature measuring means. A temperature measuring device for a moving object, characterized in that the devices are connected in series. (2) Chamfering the rear edge of the mounting insertion hole drilled in the metal piece, and inserting a sheath covered with a metal tube for protecting the temperature measuring means into the mounting insertion hole. The apparatus for measuring the temperature of a moving object according to claim 1 of the above-mentioned utility model registration. (3) A temperature measuring device for a moving object according to claim 1 or 2, which uses a perfectly round sphere as the approximately spherical metal piece. (4) A temperature measuring device for a moving object according to claim 1 or 2 of the utility model registration claim, which uses an elliptical spherical piece as the approximately spherical metal piece. (5) A device for measuring the temperature of a moving object according to claim 1 or 2, which utilizes a substantially spherical metal piece with an uneven surface.