JPH09280968A - Temperature measuring apparatus for high-temperature moving object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a temperature measuring apparatus by which the temperature of a high- temperature-heating moving object is measured without degrading its quality by a method wherein a temperature sensor which is attached to a temperature measuring place at the moving object and a data recorder which is connected to the sensor so as to store a temperature measured result are housed in a vacuum bottle, ice is sealed up and the vacuum bottle is surrounded with a heat insulating material. SOLUTION: A data recorder 2 which is connected to a temperature sensor 1 is housed in a vacuum bottle 3 together with sealed-up ice 4, and the vacuum bottle is surrounded with a heat insulating material 6. The temperature sensor 1 is attached to a temperature measuring place at a moving object, an apparatus is conveyed together with the moving object, and a temperature measured result is stored in the data recorder 2 during this time so as to be output after the finish of its conveyance. As the temperature sensor 1, various thermocouples, a resistance temperature sensor or the like can be used, the sensor is sandwiched between the vacuum bottle 3 and a vacuum-bottle lid 5, and it is passed through the heat insulating material 6 at a heat insulating lid 13 so as to be drawn out to the outside from a small hole at a case. The sealed-up ice 4 is a mixed substance of ice and water, and it is maintained at 0 deg.C by the latent heat of melting of ice. As the vacuum bottle 3, a thermos bottle or the like which is available on the market can be adopted, it is provided with the lid 5 composed of cork or the like, it is surrounded with the heat insulating material 6, and it is covered with the case 12 composed of stainless steel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature measuring device for a high temperature moving object which is heated while being conveyed in a high temperature furnace or the like.

[0002]

2. Description of the Related Art As a means for measuring the temperature of a moving object heated for heat treatment or the like while being conveyed in a high-temperature furnace or the like, a temperature sensor such as a thermocouple is attached to a temperature measuring portion of the moving object. Is connected to a data recorder, and the recorder is transported together with a moving object. The temperature measurement result is stored in the data recorder and output after being conveyed. The data recorder is housed in a heat insulating container and protected from a high temperature atmosphere.

As a temperature measuring device for such a high-temperature moving object, a device which has been conventionally used has a heat resistance temperature of a data recorder of about 350 ° C. at maximum and a usage time of about 35 minutes at that temperature. is there. It is possible to store this data recorder in a heat-insulated container and measure continuously for about 9 hours at 750 ° C, but water is used for keeping cold and water vapor is generated, so it cannot be used in a vacuum furnace or non-oxidizing furnace. .

Further, as a known document relating to a temperature measuring device for a high-temperature moving object, for example, Japanese Utility Model Laid-Open No. 61-145300.
Japanese Laid-Open Publication No. 63-5400 and Japanese Utility Model Laid-Open No. 63-5400 are known. The former includes a heat protection case for an in-reactor temperature measuring device in which a water jacket for forming an adiabatic water layer is provided around the circumference of the temperature measuring device housing corresponding to the data recorder, and the water jacket An open type thermal protection case for a temperature measuring device in a furnace is disclosed. In the latter, there is disclosed a protective case for a temperature measuring device in a reactor, in which a heat insulating water layer made of a water absorbing heat insulating material impregnated with water is formed on the outer peripheral portion of the temperature measuring device housing.

The techniques disclosed in the above publications protect the temperature measuring device only with the water layer for heat insulation, and as described in the field of industrial use in the specification, a baking drying furnace for painting and a food heat treatment furnace. This is for protection in a relatively low temperature atmosphere for a short time. Since the latent heat of vaporization of water is used to improve the heat insulation effect, water vapor is generated during use, so it cannot be used in a vacuum furnace or a non-oxidizing furnace. In general, a heat insulating material has a heat insulating effect in the air layer. Therefore, when water is impregnated as in the latter publication, the heat insulating property is deteriorated due to the heat conduction of water, so that the temperature of a high temperature and a long time is long. Not suitable for use.

[0006]

When improving the material quality of products and setting heat treatment conditions for new steel types in the manufacturing process of steel products, etc., the products are conveyed in the actual heating furnace and the temperature history of each part of the product is accurately determined. Sometimes it is necessary to measure and analyze. At that time, the conventional temperature measuring device has a problem that it cannot be used due to lack of measurable temperature and time.

Further, when carrying out brazing and non-oxidizing heat treatment of various parts by transporting them in a vacuum furnace or a non-oxidizing heating furnace, when it is necessary to control the temperature of each part of the parts with high precision, There is a problem in that the temperature measuring device cannot be used because water vapor is generated from the heat insulating container containing the data recorder during the measurement and the surface quality of the product is deteriorated. Further, it has been difficult to further improve the heat resistance of the data recorder because the cost is extremely high.

The present invention is a temperature measuring device for a high-temperature moving object which is heated while being conveyed in a high-temperature furnace or the like, which does not deteriorate the surface quality of a material to be heated due to generation of water vapor and suppresses an increase in cost. The purpose is to provide a device.
Another object of the present invention is to provide an apparatus capable of measuring at a higher temperature or for a longer time.

[0009]

A first aspect of the present invention for achieving the above object is to provide a temperature sensor attached to a temperature measuring position of a moving object, a data recorder which is connected to the temperature sensor and stores a temperature measuring result, A temperature measuring device for a high-temperature moving object, comprising: a vacuum bottle for accommodating the data recorder, ice sealed in the vacuum bottle together with the data recorder, and a heat insulating material surrounding the vacuum bottle.

A second invention is a temperature sensor attached to a temperature measuring point of a moving object, a data recorder connected to the sensor for storing a temperature measurement result, a vacuum bottle for accommodating the data recorder, and a data recorder together with the data recorder. A temperature measuring device for a high temperature moving object, comprising: sealed ice contained in a vacuum bottle; a water bottle containing the vacuum bottle and having an evaporation port; and a heat insulating material surrounding the water bottle.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the first invention is shown in FIGS. 1 is a longitudinal sectional view, and FIG. 2 is a top view taken along the line AA of FIG. As shown in FIG. 1, the data recorder 2 connected to the temperature sensor 1 is connected to the vacuum bottle 3 together with the sealed ice 4.
And the vacuum bottle 3 is surrounded by a heat insulating material 6. The temperature sensor 1 is attached to a temperature measurement location of a moving object (not shown), and the present apparatus is transported together with the moving object, while the temperature measurement result is stored in the data recorder 2 and output after the transportation is completed.

As the temperature sensor 1, various thermocouples or resistance temperature detectors can be used, which are sandwiched between the vacuum bottle 3 and the vacuum bottle lid 5, pass through the heat insulating material 6 of the heat insulating lid 13, and pass through the case 7 It goes out from the small hole of. As data recorder 2,
Various types of commercially available devices that store the output of the temperature sensor 1 attached to one or more temperature measurement points of the target moving object and output it to a personal computer or the like after the end of transportation to display or record the temperature transition of the moving object. Can be used. The example in FIG.
The data recorder 2 has six terminals, one of which is connected to the temperature sensor 1.

The sealed ice 4 is a mixture of ice and water, which itself is maintained at 0 ° C. and is housed in a fixed or irregular sealed container. Then, although the inside of the vacuum bottle 3 is kept cool by the latent heat of melting of ice, the temperature does not become lower than 0 ° C. Therefore, the data recorder 2 is protected from a high temperature atmosphere and is never below 0 ° C. In addition,
The ice 4 surrounds the periphery of the data recorder 2 as shown in FIG. 1, and can also be placed above and below the data recorder 2.

The vacuum bottle 3 may be a commercially available vacuum thermos bottle or the like. In the example of FIG. 1, the vacuum bottle 3 has a vacuum bottle lid 5 made of cork or the like and has a multilayer vacuum heat insulating structure, but it has a single layer structure. It is also possible to use stainless steel or the like having good radiation heat insulating property as the material. The vacuum bottle 3 is surrounded by a heat insulating material 6 around and above and below, and is covered with a case 12 made of heat-resistant stainless steel or the like. As the heat insulating material 6, ceramic fiber or the like can be adopted. The heat insulating material 6 and the case 12 are divided into upper and lower parts, and the upper side constitutes the heat insulating lid 13, and the upper and lower cases 7 are fastened and fixed by bolts and nuts. 14 is a handle.

In the temperature measuring apparatus of the first aspect, the data recorder 2 can be protected from the high temperature atmosphere of the heating furnace by the solid heat insulating material 6 such as ceramic fiber, the vacuum bottle 3, and the sealed ice 4. . The temperature of the vacuum bottle 3 can be maintained at 0 ° C to 50 ° C by the latent heat of melting until the sealed ice 4 is thawed, so the data recorder 2 has a special heat-resistant structure. do not have to. The ice 4 is sealed and can be reused.
Further, since no steam is generated, the atmosphere in the furnace is not deteriorated by using this apparatus, and the product surface is not damaged by vacuum brazing, non-oxidation heat treatment, or the like.

An example of the second invention is shown in FIGS. 3 and 4. 3 is a vertical sectional view, and FIG. 4 is a sectional view taken along the line BB of FIG. As shown in FIG. 3, the data recorder 2 connected to the temperature sensor 1 is connected to the vacuum bottle 3 together with the sealed ice 4.
The vacuum bottle 3 is housed in a water bottle 7 having an evaporation port 10 and is surrounded by a heat insulating material 6. The temperature sensor 1 is attached to a temperature measuring position of a moving object (not shown), and this device is transported together with the moving object, while the temperature measurement result is stored in the data recorder 2 and output to a personal computer or the like after the transportation is completed. .

As in this example, the second invention is the same as the first invention device except that it has the water bottle 7, and therefore the water bottle 7 will be mainly described below, and the description of the common parts with the first invention will be omitted. To do. Water 8 is accommodated in the water bottle 7, and steam is released from the evaporation port 11 to keep the inside of the vacuum bottle 3 and its inside cool by the latent heat of evaporation of the water 8. In this example, the water bottle 7 has a water bottle lid 9, and the water in the water bottle lid 9 evaporates from the evaporation port 10 to keep the water cool from above.
The vacuum bottle 3 has a single-layer vacuum heat insulating structure in the example of FIG. 3, but may have a multi-layer structure. Temperature sensor 1
Is sandwiched between the water bottle 7 and the water bottle lid 9, passes through the heat insulating material 6 of the heat insulating lid 13, and exits from the small hole of the case 7.

In the temperature measuring device of the second invention, the data recorder 2 can be protected from the high temperature atmosphere of the heating furnace by the solid heat insulating material 6 such as ceramic fiber, the water bottle 7, the vacuum bottle 3, and the sealed ice 4. it can. The temperature of the vacuum bottle 3 can be maintained at 0 ° C to 50 ° C by the latent heat of melting until the sealed ice 4 is thawed, so the data recorder 2 has a special heat-resistant structure. do not have to. The ice 4 is sealed and can be reused. Furthermore, since the inside can be kept cool by the latent heat of vaporization until the water in the water bottle 7 or further the water bottle lid 9 is completely evaporated, it is not suitable for a vacuum furnace or a non-oxidizing furnace, but it has a cold keeping effect in a higher temperature atmosphere. The cold insulation effect of the sealed ice 4 can be maintained for a long time.

[0019]

【Example】

(1) The apparatus of the first invention as shown in FIGS. 1 and 2 was loaded into a heating furnace, and the temperature inside the furnace and the temperature at the position of the data recorder 2 were measured. The capacity of the vacuum bottle 3 was 9 liters, the sealed ice 4 was also placed on the upper side of the data recorder 2, and the total amount of ice was 1.2 kg. The furnace temperature of the heating furnace was kept at 650 ° C., the furnace heater was turned off 90 minutes after charging the first invention device, and the measurement was performed up to 180 minutes.
Shown in The temperature at the position of the data recorder 2 was kept at 40 ° C. or lower even after 180 minutes (3 hours) after charging. Then, it was predicted that the temperature at that position reached 40 ° C. 190 minutes after the charging. Further, the dew point in the furnace was not raised by charging the first invention device.

Therefore, the product to be heated has a furnace temperature of 650.
To measure the product temperature when passing through the atmosphere of 90 ° C in 90 minutes with high accuracy by the device of the first invention using a data recorder with a heat resistant temperature of 40 ° C without causing deterioration of the product surface quality due to oxidation or the like. Is possible. Moreover, since the temperature of the sealed ice does not become lower than 0 ° C., the data recorder for room temperature can be used.

(2) When changing the annealing conditions of the carbon steel wire rod coil, the temperature transition of each part of the coil was measured using the second invention apparatus as shown in FIGS. 3 and 4. As shown in FIG. 6, a pedestal 17 is provided in the coil of the wire rod coil 16 placed on the pedestal 18 and transported in the furnace.
The temperature measuring device 15 of the invention was mounted. The measurement point is P1 ~
There are 6 points of P6, and the temperature sensor 1 consisting of CA thermocouple is 6
This was connected to a data recorder in the temperature measuring device 15.
The volume of the vacuum bottle 3 and the ice amount of the sealed ice 4 were the same as in (1) above, and the total amount of water 8 was 3.5 liters.
As the data recorder, an inexpensive room temperature measuring device having a working temperature of -5 to + 45 ° C was adopted.

The wire coil 16 passes through the preheating furnace and the annealing furnace in about 17 hours, during which the wire temperature, the water temperature in the water cylinder,
The temperature transition at the data recorder position was as shown in FIG. The wire temperature is P1, P2, P in FIG.
The four points of 3 and P5 are shown. The maximum wire temperature is 7
The temperature was 30 ° C, and water remained in the water bottle after passing through the furnace, and the sealed ice 4 partially melted, but still remained, and the temperature in the water bottle was about 100 ° C or less, the temperature at the data recorder position. Was maintained at about 0 ° C. Although steam was released from this equipment into the furnace, the surface properties of the wire did not deteriorate because the atmosphere was controlled by supplying a non-oxidizing gas such as N ₂ gas with a low dew point into the furnace. It was

[0023]

According to the first invention device of the present invention, the data recorder is protected from the high temperature atmosphere by the heat insulating effect by the vacuum bottle and the heat insulating material and the cold insulating effect utilizing the latent heat of melting of the sealed ice. Therefore, as the data recorder, it is possible to use an inexpensive one for room temperature whose operating temperature is -5 to + 45 ° C. Since the ice is contained in the hermetically sealed container, it does not generate water vapor or gas, and does not cause a problem such as oxidation of the surface of the material to be heated even when applied to a vacuum furnace or a non-oxidizing furnace. In addition, the device of the second invention is not suitable for a vacuum furnace or a non-oxidizing furnace because of the cold insulation effect that utilizes latent heat of vaporization of water in the water cylinder, but using the same inexpensive data recorder as the first invention, It is possible to measure at a higher temperature for a long time.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a first invention device of the present invention.

FIG. 2 is a top view showing an example of a first invention device of the present invention, and is a view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view showing an example of a second invention device of the present invention.

FIG. 4 is a cross-sectional view showing an example of a second invention device of the present invention, which is a view taken along the line BB of FIG.

FIG. 5 is a graph showing an embodiment of the first invention device of the present invention.

FIG. 6 is a sectional view showing an embodiment of a second invention device of the present invention.

FIG. 7 is a graph showing an embodiment of the second invention device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Temperature sensor 2 ... Data recorder 3 ... Vacuum bottle 4 ... Sealed ice 5 ... Vacuum bottle lid 6 ... Heat insulating material 7 ... Water bottle 8 ... Water 9 ... Water bottle lid 10 ... Evaporation port 11 ... Evaporation port 12 ... Case 13 ... Insulation lid 14 ... Handle 15 ... Temperature measuring device 16 ... Wire coil 17 ... Stand 18 ... Conveyor P ... Temperature measuring point

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Asahi Narita 12 Nakamachi, Muroran City, Muroran, Hokkaido Inside Nippon Steel Co., Ltd. Muroran Works (72) Inventor Hiroaki Nishikawa 12 Nakamachi, Muroran City, Hokkaido Nittetsu Hokkaido Control System Co., Ltd.

Claims (2)

[Claims] 1. A temperature sensor attached to a temperature measurement point of a moving object, a data recorder connected to the sensor for storing temperature measurement results, a vacuum bottle containing the data recorder, and a vacuum bottle together with the data recorder. A temperature measuring device for a high-temperature moving object, comprising: sealed ice; and a heat insulating material surrounding the vacuum bottle. 2. A temperature sensor attached to a temperature measuring point of a moving object, a data recorder connected to the sensor for storing temperature measurement results, a vacuum bottle containing the data recorder, and a vacuum bottle together with the data recorder. A temperature measuring device for a high-temperature moving object, comprising: sealed ice, a water bottle containing the vacuum bottle and having an evaporation port, and a heat insulating material surrounding the water bottle.