JPH0795047B2 - Heating furnace for thermal analyzer - Google Patents
Heating furnace for thermal analyzerInfo
- Publication number
- JPH0795047B2 JPH0795047B2 JP2259889A JP25988990A JPH0795047B2 JP H0795047 B2 JPH0795047 B2 JP H0795047B2 JP 2259889 A JP2259889 A JP 2259889A JP 25988990 A JP25988990 A JP 25988990A JP H0795047 B2 JPH0795047 B2 JP H0795047B2
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- heating furnace
- tank
- refrigerant tank
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、試料を加熱し適当な荷重を加えてその熱的
変化に伴う効果を測定する熱機械分析装置や試料を加熱
し試料重量の変化を測定する熱重量測定装置等で用いら
れる熱分析装置の加熱炉に関する。The present invention relates to a thermomechanical analyzer for heating a sample and applying an appropriate load to measure the effect associated with its thermal change, and heating the sample to measure the weight of the sample. The present invention relates to a heating furnace of a thermal analysis device used in a thermogravimetric measuring device or the like for measuring changes.
従来、熱分析装置を用いて測定試料を低温領域（氷点下
−100℃以下）まで冷却する場合には、第２図に示すよ
うに、ヒータ線を巻装し試料を挿入した加熱炉21全体を
別個の液体窒素（N2）等の冷媒の入れた冷媒槽23で覆
い、この冷媒槽23によってシールドカバー22を介して加
熱炉21を間接的に冷却するか、若しくは気化した冷媒の
低温気体を加熱炉21に吹きつけて冷却するという方法が
用いられていた。Conventionally, when a measurement sample is cooled to a low temperature region (below −100 ° C. below freezing point) using a thermal analysis device, as shown in FIG. 2, the entire heating furnace 21 in which a heater wire is wound and the sample is inserted is used. It is covered with a separate coolant tank 23 containing a coolant such as liquid nitrogen (N 2 ) and indirectly cools the heating furnace 21 via the shield cover 22 by this coolant tank 23, or cools the vaporized low-temperature gas of the coolant. The method of spraying on the heating furnace 21 to cool it has been used.
上記するように、加熱炉全体を冷媒槽によって間接的に
冷却する方法では大容量の槽が必要となり装置全体が大
きくなると共に使用する冷媒も大量に必要でありコスト
高となる。また、気化した低温気体を加熱炉に吹きつけ
る方法では気化することによる温度上昇によって冷却能
力も低下し測定精度も悪くなる。この発明はかかる課題
を解決するためになされたものである。As described above, in the method of indirectly cooling the entire heating furnace by the refrigerant tank, a large-capacity tank is required, the entire apparatus becomes large, and a large amount of refrigerant to be used is required, resulting in high cost. Further, in the method in which the vaporized low-temperature gas is blown to the heating furnace, the temperature rise due to the vaporization lowers the cooling capacity and deteriorates the measurement accuracy. The present invention has been made to solve such problems.
即ち、上記する課題を解決するためにこの発明にかかる
熱分析用加熱炉は、炉内部に測定試料を設置し周囲には
ヒータ線を巻装しシールドカバー等で覆った加熱炉本体
と、前記加熱炉本体を覆う外側カバー等に取付けられ槽
内部に前記加熱炉本体の下部のみを冷却する冷媒を入れ
た冷媒槽と、前記冷媒槽内の液面に設置され冷媒の液面
レベルが一定レベル以下になると冷媒タンクより供給管
を介して前記冷媒槽内に冷媒を供給するように設置され
た液面センサと、より成ることを特徴とする。That is, the heating furnace for thermal analysis according to the present invention in order to solve the above problems, a heating furnace main body in which a measurement sample is installed inside the furnace and a heater wire is wound around and covered with a shield cover or the like, A refrigerant tank attached to an outer cover or the like covering the heating furnace body and containing a refrigerant for cooling only the lower part of the heating furnace body inside the tank, and a liquid level of the refrigerant installed at the liquid level in the refrigerant tank is a constant level In the following, the liquid level sensor is installed so as to supply the refrigerant from the refrigerant tank into the refrigerant tank through the supply pipe.
この発明にかかる熱分析装置用加熱炉を上記手段とすれ
ば次のように作用する。即ち、添付図の符号を参照して
説明すると、加熱炉本体１は下部の冷媒槽５に浸けた冷
媒６による熱伝導で冷却される。また前記冷媒槽５内の
冷媒の一部の気化による低温気体が上昇して加熱炉本体
１外周部を冷却し、冷媒槽５による冷媒の冷却と合わせ
て加熱炉本体１を効率良く冷却する。更に、冷媒槽５内
の冷媒量は液面センサ11によってその液面レベルを常に
監視され、気化した量の分は直ちに冷媒タンクから補給
するようにしているので冷媒量は安定し且つ安定した試
料測定が可能となる。If the heating furnace for the thermal analysis device according to the present invention is used as the above means, it operates as follows. That is, referring to the reference numerals in the attached drawings, the heating furnace main body 1 is cooled by heat conduction by the refrigerant 6 immersed in the lower refrigerant tank 5. Further, the low temperature gas due to the vaporization of a part of the refrigerant in the refrigerant tank 5 rises to cool the outer peripheral portion of the heating furnace body 1, and together with the cooling of the refrigerant in the refrigerant tank 5, the heating furnace body 1 is efficiently cooled. Further, the amount of the refrigerant in the refrigerant tank 5 is constantly monitored by the liquid level sensor 11, and the vaporized amount is immediately supplied from the refrigerant tank, so that the amount of the refrigerant is stable and stable. It becomes possible to measure.
以下、この発明の具体的実施例について図面を参照して
説明する。Specific embodiments of the present invention will be described below with reference to the drawings.
第１図はこの発明にかかる熱分析装置用加熱炉とその周
囲の断面図である。１は加熱炉本体であって周囲にはヒ
ータ線２が巻装してあり高温測定の場合には該ヒータ線
２により加熱する。測定試料は加熱炉本体内のほぼ中
心、即ちヒータ線２の中心付近であるＯ部に設置され
る。即ち、熱重量測定装置では吊線により試料皿が、熱
機械分布装置では試料支持管により試料台がＯ部付近に
に設置される。尚、該ヒータ線２の周囲はセラミック製
ヒータカバー３で覆い、更に該ヒータカバー３の外側か
らシールドカバー４で覆い、前記加熱炉本体１内の温度
を安定させるようにしてある。FIG. 1 is a cross-sectional view of a heating furnace for a thermal analysis device and its surroundings according to the present invention. Reference numeral 1 denotes a heating furnace main body, around which a heater wire 2 is wound, and is heated by the heater wire 2 for high temperature measurement. The sample to be measured is placed at the center of the heating furnace body, that is, at the portion O near the center of the heater wire 2. That is, in the thermogravimetric measuring device, the sample pan is installed near the O part by the suspension wire, and in the thermomechanical distribution device, the sample support tube is installed near the O part. The circumference of the heater wire 2 is covered with a ceramic heater cover 3 and further covered with a shield cover 4 from the outside of the heater cover 3 to stabilize the temperature inside the heating furnace body 1.
５は冷媒槽であって内部に液体窒素等の冷媒６が入れて
ある。該冷媒槽５の冷媒６には前記加熱炉本体１の下部
のみが浸けられている。この冷媒槽５の最下部には中空
状のフェルール７が加熱炉本体１の外側に嵌められ金具
８で押さえられ固定されている。従って冷媒６が漏れる
ことはない。Reference numeral 5 denotes a refrigerant tank in which a refrigerant 6 such as liquid nitrogen is put. Only the lower part of the heating furnace main body 1 is immersed in the refrigerant 6 in the refrigerant tank 5. A hollow ferrule 7 is fitted to the outermost portion of the heating furnace main body 1 at the lowermost portion of the refrigerant tank 5 and is held and fixed by a metal fitting 8. Therefore, the refrigerant 6 does not leak.
また上記するように、冷媒６は前記加熱炉本体１の下部
のみに接触しており該加熱炉本体１内に漏れることはな
い。Further, as described above, the refrigerant 6 is in contact only with the lower portion of the heating furnace main body 1 and does not leak into the heating furnace main body 1.
次に、前記冷媒槽５は外側カバー９にネジ止めされ、更
に冷媒タンク（図示せず）より供給管10から供給される
ようになっている。冷媒６は回りとの温度差により一部
気化するが、この低温気体は冷媒槽５の上方へ流れ、前
記シールドカバー４内に入って前記加熱炉本体１の外壁
周期を冷却する。また前記冷媒槽５内の冷媒は液面に液
面センサ11が設置され、常にその量を監視されている。
即ち、該液面センサ11により冷媒６の液面レベルが一定
レベル以下になると前記冷媒タンク（図示せず）より冷
媒が前記供給管10を通じて冷媒槽５内に供給される。こ
のように冷媒の量を常に一定に保つのは冷却温度を安定
させ、定常状態で試料の測定を行うためである。Next, the refrigerant tank 5 is screwed to the outer cover 9 and supplied from a supply pipe 10 from a refrigerant tank (not shown). The refrigerant 6 partly vaporizes due to the temperature difference from the surroundings, but this low-temperature gas flows above the refrigerant tank 5 and enters the shield cover 4 to cool the outer wall cycle of the heating furnace body 1. A liquid level sensor 11 is installed on the liquid surface of the refrigerant in the refrigerant tank 5, and the amount of the refrigerant is constantly monitored.
That is, when the liquid level sensor 11 brings the liquid level of the coolant 6 below a certain level, the coolant is supplied from the coolant tank (not shown) into the coolant tank 5 through the supply pipe 10. The reason why the amount of the refrigerant is always kept constant is to stabilize the cooling temperature and measure the sample in a steady state.
この発明にかかる熱分析用加熱炉は以上のような構成か
らなる。The heating furnace for thermal analysis according to the present invention is configured as described above.
而して、加熱炉本体１は下部の冷媒槽５に浸けた冷媒６
による熱伝導で冷却され、また前記冷媒槽５内の冷媒の
一部の気化による低温気体が上昇して加熱炉本体１外周
部を冷却し、冷媒槽５による冷媒の冷却と合わせて加熱
炉本体１を効率良く冷却する。更に、冷媒槽５内の冷媒
量は液面センサ11によってその液面レベルを常に監視さ
れ、気化量分は直ちに冷媒タンク（図示せず）から補給
するようにしているので冷媒量は安定し且つ安定した試
料測定が可能となる。Thus, the heating furnace body 1 has the refrigerant 6 immersed in the lower refrigerant tank 5.
Is cooled by heat conduction by the cooling tank, and a low temperature gas due to vaporization of a part of the refrigerant in the refrigerant tank 5 rises to cool the outer peripheral portion of the heating furnace main body 1. Cool 1 efficiently. Furthermore, the amount of refrigerant in the refrigerant tank 5 is constantly monitored by the liquid level sensor 11, and the amount of vaporization is immediately supplied from the refrigerant tank (not shown), so that the amount of refrigerant is stable and Stable sample measurement becomes possible.
この発明にかかる熱分析装置用加熱炉は以上詳述したよ
うな構成としたので、加熱炉本体の下部を冷媒で直接冷
却すると同時に測定試料の設置される加熱炉本体の上部
近傍を気化した冷媒の低温気体で冷却することにより、
比較的小容量の冷媒槽で冷却能力の優れた小型の熱重量
分析用或いは熱機械分析用の加熱炉を提供することが出
来る。また使用する冷媒も少量で済むのでコストの低い
経済的な加熱炉を提供することが出来る。Since the heating furnace for the thermal analysis device according to the present invention is configured as described above in detail, the lower part of the heating furnace body is directly cooled by the refrigerant, and at the same time, the upper part of the heating furnace body in which the measurement sample is installed is vaporized near the refrigerant. By cooling with the low temperature gas of
It is possible to provide a small heating furnace for thermogravimetric analysis or thermomechanical analysis, which has a relatively small capacity of a refrigerant tank and is excellent in cooling capacity. Further, since a small amount of refrigerant is used, it is possible to provide an economical heating furnace with low cost.
第１図はこの発明にかかる熱分析装置用加熱炉とその周
囲の断面図、第２図は従来の熱分析装置用加熱炉とその
周囲の断面図である。 １……加熱炉本体、２……ヒータ ４……シールドカバー、５……冷媒槽、６……冷媒 ９……外側カバー、10……冷媒供給管 11……液面センサFIG. 1 is a sectional view of a heating furnace for a thermal analysis apparatus and its surroundings according to the present invention, and FIG. 2 is a sectional view of a conventional heating furnace for a thermal analysis apparatus and its surroundings. 1 ... Heating furnace main body, 2 ... Heater 4 ... Shield cover, 5 ... Refrigerant tank, 6 ... Refrigerant 9 ... Outer cover, 10 ... Refrigerant supply pipe 11 ... Liquid level sensor
Claims (1)
線を巻装した加熱炉本体と、前記加熱炉本体を覆う外側
カバーに取付け取付けられ槽内部に前記加熱炉本体の下
部のみを冷却する冷媒を入れた冷媒槽と、前記冷媒槽内
の液面に設置され冷媒の液面レベルが一定レベル以下に
なると冷媒タンクより供給管を介して前記冷媒槽内に冷
媒を供給するように設置された液面センサと、より成る
ことを特徴とする熱分析装置用加熱炉。1. A heating furnace main body in which a measurement sample is placed inside a furnace and a heater wire is wound around the furnace, and only a lower part of the heating furnace main body is attached and attached to an outer cover covering the heating furnace main body. A refrigerant tank containing a refrigerant to be cooled, and when the liquid level of the refrigerant installed on the liquid surface in the refrigerant tank falls below a certain level, the refrigerant tank supplies the refrigerant into the refrigerant tank through a supply pipe. A heating furnace for a thermal analysis device, which comprises an installed liquid level sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2259889A JPH0795047B2 (en) | 1990-09-27 | 1990-09-27 | Heating furnace for thermal analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2259889A JPH0795047B2 (en) | 1990-09-27 | 1990-09-27 | Heating furnace for thermal analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04134256A JPH04134256A (en) | 1992-05-08 |
| JPH0795047B2 true JPH0795047B2 (en) | 1995-10-11 |
Family
ID=17340347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2259889A Expired - Fee Related JPH0795047B2 (en) | 1990-09-27 | 1990-09-27 | Heating furnace for thermal analyzer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0795047B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424744B (en) * | 2015-12-22 | 2018-06-15 | 欧优科学仪器南京有限公司 | The high temperature differential scanning calorimeter of simple disc structure |
| JP6712892B2 (en) * | 2016-04-08 | 2020-06-24 | 株式会社日立ハイテクサイエンス | Thermal analysis device and sample analysis system |
| CN113758969B (en) * | 2021-11-09 | 2022-04-08 | 山东润博机械装备有限公司 | Casting temperature curve measuring device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2552146B2 (en) * | 1987-08-31 | 1996-11-06 | 理学電機株式会社 | Thermal analysis sample cooling device |
-
1990
- 1990-09-27 JP JP2259889A patent/JPH0795047B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04134256A (en) | 1992-05-08 |
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