JP2008292421A - Data recording device and its handling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data recording device for recording data for a temperature and atmosphere relating to the environment of a line including high temperature heat treatment and liquid dipping processes, and to provide its handling method. <P>SOLUTION: The data recording device comprises a data recording device body 12 to which a probe 11 is connected, and a heat insulating case 13 for storing the device body 12 removably outside the device, where an internal temperature is lower than the heatproof temperature of the device body 12 when using the device. The heat insulating case 13 is formed in a double structure with inner and outer heat insulating cases 14, 15. The device body 12 is stored in the inner heat insulating case 14 so as to record a signal value from the probe 11. Waterproof property is given to the inner heat insulating case 14 by applying liquid seal thereto to prevent the entry of liquid to the inside. The outer heat insulating case 15 is formed so that the temperature of the liquid seal is lower than the heatproof temperature when using the device. An inexpensive rubber seal material 16 can be used for the liquid seal. The device body 12 can be removed outside the device in an oxygen deficient atmosphere so that the flammable liquid can be safely handled. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a data recording apparatus suitable for collecting and recording data such as temperature and atmosphere throughout the entire process in a high temperature heat treatment line including a high temperature heat treatment process and a dipping process in a liquid, and a method for handling the same. .

A high-temperature heat treatment furnace, for example, a continuous gas carburizing and quenching furnace, is a furnace in which several workpieces (carburization and quenching objects) set in a heat treatment jig are sent to the inside to perform carburizing and quenching.
The outline is shown in FIG.
As illustrated, the continuous gas carburizing and quenching furnace includes an inlet 41 having a pusher, a charging chamber 42, a skit rail 43, a peer brick 44, an arch brick 45, and a heat insulating material 46. Further, a hearth roller 47, a partition door 48, a quenching chamber 49, an exit door 50, an elevator 51, a quenching oil tank 52, an oil tank outlet door 53 and an outlet 54 are provided.
A plurality of workpieces are set on the heat treatment jig 61 and conveyed from the inlet 41 through the charging chamber 42 into the furnace. Then, after entering the quenching chamber 49 through preheating, carburizing and diffusing steps, the steel is cooled in the oil tank 52, reaches the outlet 54 through the oil tank outlet door 53, and completes the carburizing and quenching. In addition, the broken line a in a figure shows the change of the temperature in each process.

In such a high-temperature heat treatment furnace such as a continuous gas carburizing and quenching furnace, in order to properly manage the temperature that greatly affects the results of the heat treatment, such as quenching characteristics, heat treatment is performed at the initial stage of furnace start-up or during several inspections. The temperature of the workpiece set on the jig 61 (and thus the temperature in the furnace) is measured. Since a plurality of workpieces are set in the heat treatment jig 61, the temperature distribution of the workpieces having different arrangement positions in the heat treatment jig 61 can be measured by measuring the temperature of each workpiece.
The temperature (temperature distribution) is measured by arranging a thermocouple longer than the length of the furnace and attaching it to several workpieces set on a heat treatment jig.
However, since this method requires a very long thermocouple, it takes a long time for the work before and after the operation, and a relatively large number of workers are required.

Recently, a technique for measuring the temperature in a high-temperature heat treatment furnace using a temperature history data recording device including a history data recording device called a data logger has been developed (see Patent Document 1).
This consists of a sample steel plate that can be attached to and detached from the steel plate conveyed to the continuous annealing furnace, a thermocouple and data logger for measuring the temperature history of the sample steel plate, and the internal temperature when the data logger is covered and passed through the continuous annealing furnace. It is a steel plate temperature history measuring apparatus provided with the heat insulation case maintained below temperature.
Such a temperature history measuring device can be applied to the above temperature measurement in a continuous gas carburizing and quenching furnace by replacing the continuous annealing furnace with a continuous gas carburizing and quenching furnace and replacing the sample steel plate with a workpiece. Therefore, if such a temperature history measuring device is set on a heat treatment jig (work) and transported into the furnace together with the work to measure the temperature, a long thermocouple is not required. It becomes possible to know the temperature condition in the furnace without spending.

JP 2005-274297 A

However, the temperature history measuring device cannot be used in a line where the device (data logger) needs to be immersed in the liquid as it is. This is because liquid enters the apparatus and causes the data logger to fail. In particular, when applied to temperature measurement in a continuous gas carburizing and quenching furnace, when the temperature history measuring device is immersed in the oil tank, the heat insulation case is distorted by heat, and the penetration of the quenching oil into the device becomes noticeable. The damage to the data logger has been increased.
Therefore, in the heat treatment in the high temperature heat treatment furnace, especially in the carburization quenching in the continuous gas carburizing and quenching furnace shown in FIG. 4, it is used for the measurement in the entire process of carburizing and quenching until cooling in the oil tank after quenching. In the past, there has been a demand for improvement in this regard.

The present invention has been made in view of the above demands, and is a data recording apparatus capable of recording data on temperature, atmosphere, etc. related to the environment not only under high-temperature heat treatment but also under immersion in liquid. In particular, an object of the present invention is to provide a data recording apparatus capable of recording temperature data throughout the entire process in carburizing and quenching by a continuous gas carburizing and quenching furnace.
In addition, when the data recording device as described above is passed through a high temperature heat treatment line from the high temperature heat treatment step to the immersion step in a flammable liquid, and used for recording data relating to the line environment, It is an object of the present invention to provide a method of handling a data recording apparatus that can safely remove the data recording apparatus main body from the apparatus.

The above-described problems can be solved by configuring the data recording apparatus and the handling method thereof in the configurations of the following aspects.
As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is merely for the purpose of facilitating the understanding of the present invention, and the technical features described in this specification and combinations thereof should not be construed as being limited to those described in the following sections. . In addition, when a plurality of items are described in one section, it is not always necessary to employ the plurality of items together, and it is also possible to take out only a part of the items and employ them.

  Of the following items, (1) is in claim 1, (2) is in claim 2, (3) is in claim 3, (4) is in claim 4, (7) The term corresponds to claim 5, and the term (9) corresponds to claim 6. The items (5), (6) and (8) are not claimed inventions.

(1) A probe having a detection unit extending outside the apparatus, a data recording apparatus main body for receiving a signal from the probe and recording the value, and housing the data recording apparatus main body so that the data recording apparatus main body can be taken out from the apparatus. In a data recording device comprising a heat insulating case for keeping the internal temperature during use below the heat resistance temperature of the data recording device main body, the heat insulating case has a double structure of an inner heat insulating case and an outer heat insulating case, The data recording device main body is housed in the inner heat insulation case so as to receive a signal from the probe from which the detection unit is extended to the outside of the outer heat insulation case and record the value thereof. A liquid seal that prevents intrusion of liquid into the interior including the part where the probe is inserted is provided, and the outer heat insulating case is a space formed by the inner heat insulating case when the apparatus is used. The data recording device is characterized in that the temperature inside can be kept below the heat resistant temperature of the liquid seal.
The probe has a shape such as a needle shape, a rod shape, a strip shape, and the tip portion thereof is normally a detection portion. Therefore, the tip portion is extended outside the apparatus. The term “probe” includes a portion that functions as a conduction line (detection signal transmission line) to the data recording apparatus main body.
As the probe, a thermocouple is used when detecting temperature, particularly high temperature. Examples of detection objects other than temperature include detection of an atmosphere such as humidity and the concentration of a specific gas. In this case, a humidity or gas sensor is used as a probe.
The heat insulating case also has heat resistance.
The reason why the heat insulating case has a double structure is that the heat resistance temperature of the sealing material (liquid sealing material) used for the liquid seal for preventing the liquid from entering the inside is generally not so high. If the temperature is lowered by the outer heat insulating case, the data recording device main body is stored in the inner heat insulating case, and the inner heat insulating case is liquid-sealed, not only under high-temperature heat treatment but also under immersion in liquid When it is desired to record data such as temperature and atmosphere related to the environment, it can be surely performed. In addition, a general liquid sealing material can be used for the liquid seal, and the cost for the liquid seal can be reduced.
(2) The data recording apparatus according to item (1), wherein a heat insulating material is interposed between the inner heat insulating case and the outer heat insulating case.
If a heat insulating material is interposed between the inner heat insulating case and the outer heat insulating case, it is possible to prevent the heat on the outer heat insulating case side from being directly transferred to the inner heat insulating case side. In particular, even when the periphery and opposing surfaces of the inner and outer heat insulation cases are made of a material having high thermal conductivity, for example, are made of metal, the heat on the outer heat insulation case side is not directly transferred to the inner heat insulation case side.
(3) The inner heat insulating case and the outer heat insulating case are each divided into two vertically, and the vertical positions of the upper and lower mating surfaces of the inner and outer heat insulating cases are made different except for the insertion portion of the probe. The data recording apparatus according to (1) or (2), wherein a liquid sealing material is provided over the entire circumference on the upper and lower mating surfaces of the case.
Advantages of extending the probe straight from the data recording device main body by making the vertical position of the upper and lower mating surfaces of the inner and outer heat insulation cases different except for the probe insertion point (easy to attach the probe to the data recording device main body The temperature at the location where the liquid sealing material through which the probe of the inner heat insulating case is inserted is provided can be lowered.
According to the fact that the liquid sealing material is provided on the upper and lower mating surfaces of the inner heat insulating case over the entire circumference, even if the liquid enters the space formed by the inner and outer heat insulating cases, the liquid remains in the data recording device main body. The main body of the data recording apparatus is protected from the liquid.
(4) The data recording apparatus according to item (3), wherein the vertical position of the upper and lower mating surfaces of the inner heat insulating case is different between the insertion position of the probe and the other positions.
The probe insertion point of the inner heat insulation case can be set according to the probe insertion point of the outer heat insulation case, and the probe can be easily attached.
(5) The outer heat insulating case is configured to be able to maintain a temperature in a space formed by the inner heat insulating case at less than 300 ° C. when the apparatus is used, and a rubber-based sealing material is used as the liquid sealing material. The data recording apparatus according to (3) or (4), wherein the probe is sandwiched from above and below by the rubber-based sealing material at the insertion location of the inner heat insulating case.
If the outer heat insulating case is configured so that the temperature in the space formed by the inner heat insulating case can be kept below 300 ° C. when the apparatus is used, a general rubber-based sealing material can be used as the liquid sealing material. A general rubber-based sealing material is inexpensive but has a large sealing effect and is cost-effective.
(6) The data recording apparatus according to any one of (1) to (5), wherein the probe is a thermocouple, and the data recording apparatus main body records temperature data.
If you use a thermocouple for the probe and a data recorder main unit that records temperature data in the data recorder main unit, you can collect and record temperature data in a high-temperature heat treatment furnace, especially a continuous gas carburizing and quenching furnace (including a quenching oil tank). A suitable data recording apparatus can be provided.
(7) The data recording device according to any one of (1) to (6) is passed through a high-temperature heat treatment line from a high-temperature heat treatment step to an immersion step in a flammable liquid, and the line environment In the method of handling the data recording apparatus when the data recording apparatus main body housed in the heat insulating case is taken out of the apparatus after recording such data, the data recording apparatus that records the data contains a gas other than oxygen. A method of handling a data recording apparatus, characterized in that the main body of the data recording apparatus transported in a main atmosphere and housed in the heat insulating case in the atmosphere is taken out of the apparatus.
Examples of the immersing step in the flammable liquid include a cooling step after quenching in a high-temperature heat treatment line such as continuous gas carburizing quenching. In this case, the flammable liquid becomes quenching oil.
After the data recording device records data such as temperature and atmosphere (specific gas concentration) related to the line environment, when the data recording device main body housed in the heat insulation case is taken out of the device, it is formed by the inner and outer heat insulation cases. There is a risk of igniting the quenching oil that has entered the space or attached to the surface of the outer heat insulating case. If the quenching oil is ignited, there is a risk of damage to the data recording device main body, burns of workers, and the occurrence of fire, and it is a major challenge to prevent the quenching oil from igniting.
Therefore, if the data recording device after data recording is transported into an atmosphere mainly composed of a gas other than oxygen (oxygen deficient atmosphere) and the outer heat insulating case and the inner heat insulating case are opened in the atmosphere, the hardened oil is obtained. Is not generated, and the data recording apparatus main body is safely taken out from the apparatus.
An atmosphere mainly composed of a gas other than oxygen can be generated, for example, by placing dry ice or liquid nitrogen in a housing (or a room) that can accommodate the data recording device. The inside of the casing is an atmosphere of carbon dioxide gas if dry ice is put, and nitrogen gas if liquid nitrogen is put. Therefore, if the data recording device after data recording is transported into such a case and the data recording device main body is taken out of the device, when the heat insulating case is opened and the data recording device main body is taken out of the device, the inside and outside The quenching oil that has entered the space formed by the heat insulating case or adhered to the inner and outer heat insulating case surfaces does not ignite, and the data recording apparatus main body can be safely taken out of the apparatus.
(8) The data recording device according to any one of items (1) to (6) is passed through a high-temperature heat treatment line from a high-temperature heat treatment step to an immersion step in a flammable liquid, and the line environment In the method of handling the data recording apparatus when the data recording apparatus main body housed in the heat insulation case is taken out of the apparatus after recording such data, the data recording apparatus recording the data mainly contains a gas other than oxygen. A method of handling a data recording apparatus, wherein the data recording apparatus is transported to and placed in the atmosphere.
According to this section, even if the data recording device main body in the method of handling the data recording device of item (7) is taken out of the device manually (artificially) instead of automatically, the method of handling of the data recording device follows Function and effect are obtained.
(9) The data recording device according to any one of items (1) to (6) is passed through a high-temperature heat treatment line from a high-temperature heat treatment step to an immersion step in a flammable liquid, and the line environment In the method of handling the data recording device when the data recording device main body housed in the heat insulation case is taken out of the device after recording such data, the space formed by the inner and outer heat insulation cases is filled with a gas other than oxygen. A method of handling a data recording device, characterized by: According to this section, the space formed by the inner and outer heat insulation cases is filled with a gas other than oxygen, so that the quenching oil is not ignited when the outer heat insulation case and the inner heat insulation case are opened. Taking out is safe.

According to the present invention, a data recording apparatus capable of recording data on temperature, atmosphere, and the like related to the environment not only under high-temperature heat treatment but also under immersion in a liquid, in particular, carburizing by a continuous gas carburizing and quenching furnace. In quenching, it is possible to provide a data recording apparatus capable of recording temperature data throughout the entire process.
In addition, even when the data recording device is passed through a high temperature heat treatment line from the high temperature heat treatment step to the immersion step in a flammable liquid and used for recording data relating to the line environment, the data recording device It is possible to provide a method of handling a data recording apparatus that can safely remove the main body from the apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol shows the same or an equivalent part between each figure.
FIG. 1 is a front view of a data recording apparatus according to an embodiment of the present invention, partially cut away. FIG. 2 is a partially cutaway view of the upper case of the outer heat insulating case of the data recording apparatus shown in FIG. FIG. 3 is a left side view of the data recording apparatus shown in FIG. 1 with the left side plate portion of the upper and lower case portions partially cut away.
The present embodiment relates to a data recording apparatus that collects and records temperature data of a work (carburization and quenching object) over the entire process in the carburizing and quenching furnace.

As shown in each drawing, the data recording apparatus according to the illustrated embodiment includes a probe, here, a thermocouple 11 for detecting temperature, a data recording apparatus main body 12 and a heat insulating case 13.
The thermocouple 11 has a detection portion (tip portion) 11a extending outside the apparatus so that the temperature of the workpiece or the vicinity thereof can be detected. The data recording device main body 12 is a data recording device main body that receives a signal from the thermocouple 11 and records the value.

The heat insulating case 13 is configured to accommodate the data recording apparatus main body 12 so that the data recording apparatus main body 12 can be taken out of the apparatus, and to keep the internal temperature during use of the apparatus below the heat resistance temperature of the data recording apparatus main body 12.
Here, the heat insulating case 13 has a double structure of an inner heat insulating case 14 and an outer heat insulating case 15. The inner and outer heat insulating cases 14 and 15 are each divided into two vertically, and the vertical positions of the upper and lower mating surfaces of the inner and outer heat insulating cases 14 and 15 are made different except for the insertion point of the thermocouple 11. It has been.
Further, a liquid sealing material, here a rubber-based sealing material 16, is attached to the upper and lower mating surfaces of the inner heat insulating case 14 over the entire circumference, and the thermocouple 11 is inserted at a place where the inner heat insulating case 14 is inserted. Is sandwiched from both upper and lower sides by a rubber seal 16.

The vertical position of the upper and lower mating surfaces of the inner heat insulating case 14 is different between the insertion location of the thermocouple 11 and other locations.
The heat insulating case 13 (the inner heat insulating case 14 and the outer heat insulating case 15) also has heat resistance, and is made of refractory brick or the like having a large heat storage amount, and between the inner heat insulating case 14 and the outer heat insulating case 15. A heat insulating material 17 is interposed.

In this embodiment, the upper and lower case portions 14a and 14b; 15a and 15b of the inner and outer heat insulating cases 14 and 15 do not use tightening tools such as bolts and bands, and the upper case portion 14a is placed on the lower case portions 14b and 15b. 15a, that is, only the weight of the upper case portions 14a and 15a is combined to form the inner and outer heat insulating cases 14 and 15.
The upper and lower case portions 14a, 14b; 15a, 15b are both heavy, stable even by placing the upper case portions 14a, 14b on the lower case portions 14b, 15b, and the upper and lower mating surfaces of the inner heat insulating case 14 This is because the liquid sealing function of the rubber-based sealing material 16 can also be exhibited.
The upper and lower case portions 14a and 14b; 15a and 15b, particularly the upper and lower case portions 14a and 14b of the inner heat insulating case 14, may be integrally connected using a fastener.

As described above, the heat insulation case 13 is configured to keep the internal temperature during use of the apparatus (the temperature in the inner heat insulation case 14) below the heat resistance temperature of the data recording apparatus main body 12, but the outer heat insulation case 15 Is configured so that the temperature in the space formed by the inner heat insulating case 14 can be kept below 300 ° C. when the apparatus is used. This is because the rubber-based sealing material 16 is protected from a high temperature exceeding its heat resistance temperature.
Of course, the data recording device main body 12 is housed in the inner heat insulation case 14 so as to receive a signal from the thermocouple 11 from which the detecting portion 11a extends to the outside of the outer heat insulation case 15 and record the value. is there.

As described above, according to the present embodiment, the data recording apparatus main body 12 is housed in the heat insulating case 13 (inner heat insulating case 14) to which the liquid seal is applied. The temperature data can be recorded even under immersion.
In addition, in this case, the heat insulating case 13 has a double structure, the internal heat insulating case 15 lowers the internal temperature, the data recording device main body 12 is accommodated in the inner heat insulating case 14, and the inner heat insulating case 14 is liquid-sealed. I did it.
Therefore, according to this embodiment, when it is desired to record temperature data not only under high-temperature heat treatment but also under immersion in a liquid, it can be reliably performed. Further, a general rubber-based sealing material 16 can be used for the liquid seal, and the cost for the liquid seal can be reduced.

  Further, since the heat insulating material 17 is interposed between the inner heat insulating case 14 and the outer heat insulating case 15, it is possible to prevent the heat on the outer heat insulating case 15 side from being directly transferred to the inner heat insulating case 14 side. Therefore, for example, even when the periphery and the opposing surfaces of the inner and outer heat insulating cases 14 and 15 are made of metal such as stainless steel having high thermal conductivity, the heat on the outer heat insulating case 15 side is directly transferred to the inner heat insulating case 14 side. I will not let you.

Furthermore, since the vertical positions of the upper and lower mating surfaces of the inner and outer heat insulating cases 14 and 15 are different except for the insertion portion of the thermocouple 11, the thermocouple 11 can be extended straight from the data recording device main body 12. It is possible to lower the temperature of the rubber-based sealing material 16 where the thermocouple 11 of the inner heat insulating case 14 is inserted, while ensuring the advantage (easy attachment of the thermocouple 11 to the data recording device main body 12). It is.
Further, since the vertical position of the upper and lower mating surfaces of the inner heat insulating case 14 is made different between the insertion position of the thermocouple 11 and the other positions, the thermocouple insertion position of the inner heat insulation case 14 is changed to the thermoelectric of the outer heat insulation case 15. The thermocouple 11 can be easily attached because it can be set according to the pair insertion location.

  Next, recording of temperature data in all steps (including immersion in quenching oil) of the continuous gas carburizing and quenching line using the data recording apparatus as described above, and after the data recording, the data recording apparatus main body 12 is installed. One embodiment of a method for handling the data recording apparatus when taken out outside will be described with reference to FIGS.

In the continuous gas carburizing and quenching furnace shown in FIG. 4, the data recording device shown in FIGS. 1 to 3 is placed on the heat treatment jig 61 so that the temperature set in the heat treatment jig 61 or in the vicinity thereof can be detected.
The data recording device records temperature data continuously or at regular time intervals in each step of the continuous gas carburizing and quenching line. That is, a temperature signal detected by the thermocouple 11 is sent to the data recording device main body 12, and the data recording device main body 12 records the value of the sent signal (temperature data).
During this time, the temperature in the inner heat insulation case 14 due to the heat insulation and heat resistance of the heat insulation case 13, more specifically, the inner and outer heat insulation cases 14, 15, that is, the temperature of the data recording device main body 12 is lower than its own heat resistance temperature. The data recording device main body 12 does not break down due to thermal runaway or thermal destruction.
In the step of immersing in the quenching oil, the quenching oil is exposed to the inner and outer heat insulation from the gap between the upper and lower case portions 15a and 15b of the outer heat insulating case 15 (the gap between the upper and lower mating surfaces) and the thermocouple insertion point of the outer heat insulating case 15. Even if it enters the space formed by the cases 14 and 15, the quenching oil is sealed by the rubber-based sealing material 16 of the inner heat insulating case 14.
Therefore, the quenching oil does not enter the inner heat insulating case 14, and the occurrence of a failure of the data recording apparatus main body 12 due to the quenching oil entering the inner heat insulating case 14 can be prevented.

The data recording device main body 12 accommodated in the heat insulating case 13 records temperature data throughout the entire process in the continuous gas carburizing and quenching line, and then is taken out of the device. In this embodiment, the data recording device main body 12 is It is taken out in this way.
That is, the data recording apparatus that has finished recording the temperature data is transported in an atmosphere mainly composed of a gas other than oxygen. In such an atmosphere, the outer heat insulating case 15 and the inner heat insulating case 14 are opened, and the data recording device main body 12 housed in the inner heat insulating case 14 is taken out of the device.

The quenching oil in which the data recording device is immersed together with the heat treatment jig 61 (work) after quenching has flammability in this embodiment. For this reason, after the temperature data is recorded, when the data recording device main body 12 housed in the heat insulating case 13 is taken out of the device, the data recording device main body 12 enters the space between the inner and outer heat insulating cases 14 and 15 or is on the surface of the outer heat insulating case 15. There is a risk of igniting the attached quenching oil. In particular, since the quenching oil that has entered the space cannot be wiped off, there is a great risk of ignition of the quenching oil.
If the quenching oil is ignited, there is a risk of damage to the data recording device main body 12, burns of workers, and the occurrence of a fire, and preventing ignition to the quenching oil is a major issue.

Therefore, the data recording apparatus after data recording is transported into an atmosphere mainly composed of a gas other than oxygen, for example, carbon dioxide gas or nitrogen gas, and the outer heat insulating case 15 and the inner heat insulating case 14 in that atmosphere (oxygen deficient atmosphere). If it is opened, there will be no ignition to the quenching oil. Therefore, the data recording device main body 12 can be safely taken out from the device.
An atmosphere mainly composed of a gas other than oxygen can be generated, for example, by placing dry ice or liquid nitrogen in a housing (or a room) in which a data recording device can be accommodated. The inside of the casing is an atmosphere of carbon dioxide gas if dry ice is put, and nitrogen gas if liquid nitrogen is put. In any case, the inside of the housing is in an oxygen deficient state. Therefore, if the data recording apparatus after data recording is transported into such a housing and the data recording apparatus main body 12 is taken out of the apparatus, the heat insulating case 13 is opened and the data recording apparatus main body 12 is taken out of the apparatus. At this time, the quenching oil that has entered the space by the inner and outer heat insulating cases 14 and 15 does not ignite, and the data recording apparatus main body 12 can be safely taken out of the apparatus. The same applies to the quenching oil adhering to the surface of the outer heat insulating case 15.
It is to be noted that the data recording apparatus main body 12 of the data recording apparatus which is transported in an atmosphere mainly composed of gas other than oxygen and placed in the atmosphere is taken out of the apparatus manually instead of automatically, that is, artificially. In this case, the same effect as described above can be obtained.

  As described above, according to the present embodiment, the data recording apparatus is used for recording temperature data from preheating to completion of carburizing and quenching immersed in a flammable quenching oil together with a workpiece in a continuous gas carburizing and quenching line. In this case, the data recording device main body 12 accommodated in the heat insulating case 13 can be safely taken out from the device.

In the above-described embodiment, the case where the present invention is applied to the handling method of the data recording apparatus in the case of recording the temperature data in the continuous gas carburizing and quenching line (including the dipping process in the quenching oil) has been described. In a high-temperature heat treatment line including a high-temperature heat treatment step and an immersion step in a flammable liquid, the present invention may be applied to recording data such as temperature and atmosphere related to the line environment.
When recording data such as the concentration (gas concentration) of a specific gas, for example, carbon dioxide gas, nitrogen gas, etc., or data such as humidity, a sensor that can detect the atmosphere of the probe is used.
The liquid into which the data recording apparatus is immersed is not limited to quenching oil, and the purpose of immersion is not limited to cooling after quenching.

It is a front view which cuts and shows one Embodiment of the data recording device by this invention. It is a top view which cuts and shows a part of upper case part of the outer heat insulation case of the data recording device shown in FIG. FIG. 2 is a left side view illustrating a partially cut left side plate portion of an upper heat insulating case and a lower case portion of the data recording device illustrated in FIG. 1. It is a whole lineblock diagram showing the outline of a continuous gas carburizing hardening furnace.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11: Thermocouple (probe), 11a: Detection part, 12: Data recording device main body, 13: Heat insulation case, 14: Inner heat insulation case, 15: Outer heat insulation case, 14a: Upper case part of inner heat insulation case, 14b: Inner Lower case part of heat insulation case, 15a: Upper case part of outer heat insulation case, 15b: Lower case part of outer heat insulation case, 16: Rubber-based sealing material (liquid sealing material).

Claims (6)

A probe with a detector extending outside the device, a data recording device main body that receives a signal from the probe and records the value, and stores the data recording device main body so that the data recording device main body can be taken out of the device. In a data recording device comprising a heat insulating case for keeping the internal temperature below the heat-resistant temperature of the data recording device main body,
The heat insulation case has a double structure of an inner heat insulation case and an outer heat insulation case,
The data recording device main body is housed in the inner heat insulation case so as to receive a signal from the probe from which the detection unit extends to the outside of the outer heat insulation case and record the value thereof.
The inner heat insulation case is provided with a liquid seal that prevents liquid from entering the inside, including the point where the probe is inserted,
The data recording device according to claim 1, wherein the outer heat insulating case is configured to be able to maintain a temperature in a space formed by the inner heat insulating case when the device is used below a heat resistant temperature of the liquid seal.   The data recording apparatus according to claim 1, wherein a heat insulating material is interposed between the inner heat insulating case and the outer heat insulating case.   The inner heat insulating case and the outer heat insulating case are each divided into two vertically, and the vertical positions of the upper and lower mating surfaces of the inner and outer heat insulating cases are made different except for the insertion point of the probe. 3. The data recording apparatus according to claim 1, wherein a liquid sealing material is provided on the mating surfaces over the entire circumference.   4. The data recording apparatus according to claim 3, wherein the vertical position of the upper and lower mating surfaces of the inner heat insulating case is made different between the insertion position of the probe and other positions. After the data recording device according to any one of claims 1 to 4 is passed through a high-temperature heat treatment line from a high-temperature heat treatment step to an immersion step in a flammable liquid and records data relating to the line environment, In the method of handling the data recording device when the data recording device main body stored in the heat insulation case is taken out of the device,
The data recording apparatus that records the data is transported in an atmosphere mainly composed of a gas other than oxygen, and the data recording apparatus main body housed in the heat insulating case is taken out of the apparatus in the atmosphere. To handle the data recording device. After the data recording device according to any one of claims 1 to 4 is passed through a high-temperature heat treatment line from a high-temperature heat treatment step to an immersion step in a flammable liquid and records data relating to the line environment, In the method of handling the data recording device when the data recording device main body stored in the heat insulation case is taken out of the device,
A method of handling a data recording apparatus, wherein the space formed by the inner and outer heat insulating cases is filled with a gas other than oxygen.

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