JP2585776Y2 - Thermal analyzer - Google Patents
Thermal analyzerInfo
- Publication number
- JP2585776Y2 JP2585776Y2 JP1897893U JP1897893U JP2585776Y2 JP 2585776 Y2 JP2585776 Y2 JP 2585776Y2 JP 1897893 U JP1897893 U JP 1897893U JP 1897893 U JP1897893 U JP 1897893U JP 2585776 Y2 JP2585776 Y2 JP 2585776Y2
- Authority
- JP
- Japan
- Prior art keywords
- heating furnace
- ventilation
- tube
- cooling
- ventilation tube
- 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
【0001】[0001]
【産業上の利用分野】本考案は、示差熱分析(DT
A)、熱重量測定(TGA)、熱機械的分析(TM
A)、示差走査熱量測定(DSC)などの熱分析装置に
関し、特に、その重要な構成要素である加熱炉の改良に
関する。The present invention relates to a differential thermal analysis (DT)
A), thermogravimetry (TGA), thermomechanical analysis (TM)
A) The present invention relates to a thermal analyzer such as a differential scanning calorimeter (DSC), and particularly relates to improvement of a heating furnace which is an important component thereof.
【0002】[0002]
【従来の技術】一般的に、熱分析装置では加熱炉内に設
置した試料を1500℃程度の温度まで加熱するため、
加熱炉の外周に輻射熱を反射する輻射シールドを設け、
更に、火傷をしないように輻射シールドを取り囲んで断
熱カバーが配置されている。2. Description of the Related Art Generally, a thermal analyzer heats a sample placed in a heating furnace to a temperature of about 1500 ° C.
Provide a radiation shield on the outer periphery of the heating furnace to reflect radiant heat,
Further, a heat insulating cover is arranged so as to surround the radiation shield to prevent burns.
【0003】[0003]
【考案が解決しようとする課題】従来の熱分析装置にあ
っては、加熱のエネルギーロスを小さくするため輻射シ
ールドや断熱カバーは厚く、重く、熱容量が大きく作ら
れており、また、保温を良くするためこれらシールドや
カバーは加熱炉と堅固に一体化して組み上げられてお
り、加熱炉(炉芯管)を冷却する場合は、輻射シールド
や断熱カバーの外側から行わなければならず、室温近く
まで温度を下げるには長時間を要するという問題点があ
った。[Problems to be Solved by the Invention] In the conventional thermal analyzer, the radiation shield and the heat insulating cover are made thick, heavy, and have a large heat capacity in order to reduce the energy loss of heating. Therefore, these shields and covers are tightly integrated with the heating furnace and assembled. When cooling the heating furnace (furnace tube), the cooling and heating must be performed from outside the radiation shield or heat insulation cover, and the temperature must be reduced to near room temperature. There is a problem that it takes a long time to lower the temperature.
【0004】本考案は、加熱炉の冷却効果が高く、急速
冷却を可能とした熱分析装置を提供することを目的とし
ている。An object of the present invention is to provide a thermal analyzer which has a high cooling effect of a heating furnace and enables rapid cooling.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本考案の熱分析装置は、内部に試料が設置される加
熱炉と、その外周を取り囲む輻射シールドと、更にシー
ルドの外周を取り囲んで配置された断熱カバーとから成
る熱分析装置において、加熱炉の周囲に配置された断熱
カバー及び輻射シールドを貫通して加熱炉に対向開口す
る通風筒と、この通風筒内に通風によって跳ね上がる反
射板を設け、この通風筒を通じて冷却用空気を導入する
冷却装置を備えたことを特徴とする。上記冷却装置とし
ては、外界の空気を送風するブロア装置を適用すること
ができる。また、上記反射板はブロア装置によって送ら
れた冷却空気で跳ね上がるものであり、通風筒内の適宜
の位置に取り付けることができる。更に、通風筒は一体
ものではなく、輻射シールドと冷却装置との中間で切断
し、あるいは切目を設けることが好ましい。In order to achieve the above object, a thermal analyzer according to the present invention includes a heating furnace in which a sample is placed, a radiation shield surrounding the outer periphery thereof, and a surrounding outer periphery of the shield. In a thermal analyzer comprising a heat insulating cover disposed therein, a ventilation tube penetrating through the heat insulating cover and the radiation shield disposed around the heating furnace and facing the heating furnace, and a reflecting plate which jumps up into the ventilation cylinder by ventilation. And a cooling device for introducing cooling air through the ventilation tube is provided. As the cooling device, a blower device that blows outside air can be applied. Further, the above-mentioned reflection plate jumps up with the cooling air sent by the blower device, and can be mounted at an appropriate position in the ventilation tube. Further, it is preferable that the ventilation tube is not integral, but is cut or provided with a cut in the middle between the radiation shield and the cooling device.
【0006】[0006]
【作用】上記のように構成された熱分析装置では、加熱
炉を冷却する場合、ブロア装置により外界の空気が通風
筒を通じて直接加熱炉(炉芯管)に送り込まれる。また
通風筒内の適宜の位置に設けられ、送風によって跳ね上
がる反射板は、加熱時に炉芯管表面の輻射熱でブロア装
置が過熱されるのを防ぐように働く。In the thermal analyzer configured as described above, when cooling the heating furnace, the outside air is directly sent into the heating furnace (furnace tube) through the ventilation tube by the blower device. The reflecting plate, which is provided at an appropriate position in the ventilation tube and jumps up by blowing air, works to prevent the blower device from being overheated by radiant heat on the furnace tube surface during heating.
【0007】更に、通風筒の切断部や切目は通風筒自体
を通じて熱が伝わってくるのを防止するのに効果的であ
る。Further, the cut portions and cuts of the ventilation tube are effective in preventing heat from being transmitted through the ventilation tube itself.
【0008】[0008]
【実施例】以下、本考案の熱分析装置について図面を参
照して説明すると、図1には本考案を適用したDTAの
縦断面略図、図2にはその平面略図を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The thermal analysis apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic vertical sectional view of a DTA to which the present invention is applied, and FIG.
【0009】DTAにおいては、周知のように、試料S
と参照試料Rが加熱炉1内の中央部に設置され、炉芯管
1に巻回されたヒータ線2により加熱されて、通常、室
温から1500℃程度の温度範囲で、定速昇・降温や等
温に保持したときの試料に生じる熱変化を検出器Dによ
り試料Sと参照試料Rの間の温度差として検出する。加
熱炉1はエネルギーロスを防ぐため、輻射シールド3及
び断熱カバー4で囲われている。輻射シールド3及び断
熱カバー4には筒体5a及び5bが取り付けられてお
り、筒体5a、5bとブロア装置6の送風口に取り付け
た筒体5cとで通風筒5を構成する。通風筒5(筒体5
a)内には、送風によって跳ね上がることができる反射
板7が設けられ、これにより温度上昇中における炉芯管
1表面からの輻射熱でブロア装置が過熱されるのを防ぐ
ことができる。In DTA, as is well known, the sample S
And a reference sample R are set in a central portion of the heating furnace 1 and heated by a heater wire 2 wound around a furnace core tube 1, and are usually heated at a constant speed in a temperature range from room temperature to about 1500 ° C. A change in heat generated in the sample when the temperature is kept slightly isothermal is detected by the detector D as a temperature difference between the sample S and the reference sample R. The heating furnace 1 is surrounded by a radiation shield 3 and a heat insulating cover 4 to prevent energy loss. The radiation shield 3 and the heat insulating cover 4 are provided with cylinders 5a and 5b, respectively. The cylinders 5a and 5b and the cylinder 5c attached to the blower of the blower device 6 constitute the ventilation tube 5. Ventilation cylinder 5 (Cylinder 5
In (a), there is provided a reflecting plate 7 that can jump up by blowing air, thereby preventing the blower device from being overheated by the radiant heat from the surface of the furnace core tube 1 during the temperature rise.
【0010】通風筒5はブロア装置6と連結されている
が、通風筒5とブロア装置6との間(筒体5bと5cと
の間)には隙間8が設けられ、これによって試料加熱中
に通風筒5(筒体5b)を伝って加熱炉1内の熱がブロ
ア装置6に達し、同装置6が過熱されるのを防いでい
る。Although the ventilation tube 5 is connected to the blower device 6, a gap 8 is provided between the ventilation tube 5 and the blower device 6 (between the cylinders 5b and 5c), thereby allowing the sample to be heated. The heat in the heating furnace 1 is transmitted to the blower device 6 via the ventilation tube 5 (cylinder body 5b) to prevent the device 6 from being overheated.
【0011】分析が終了し、加熱炉1を冷却する場合に
は、ブロア装置6の駆動により通風筒5を通じて送られ
る冷却用空気(外界の空気)が、通風筒5(5a)内に
設置された反射板7を跳ね上げ、直接炉芯管1に当って
冷却を行う。また、炉芯管1に当った冷却用空気は輻射
シールド3及び断熱カバー4の隙間を通って上部に開け
られた穴9及び10から外界へ排出される。このように
して加熱炉1(炉芯管)は急速に冷却され、室温に至る
までの時間が大幅に短縮される。When the heating furnace 1 is cooled after the analysis is completed, cooling air (outside air) sent through the ventilation tube 5 by driving the blower device 6 is installed in the ventilation tube 5 (5a). The reflecting plate 7 is flipped up and directly hits the furnace core tube 1 to perform cooling. Further, the cooling air that has hit the furnace core tube 1 passes through the gap between the radiation shield 3 and the heat insulating cover 4 and is discharged to the outside through holes 9 and 10 formed at the top. In this manner, the heating furnace 1 (furnace tube) is rapidly cooled, and the time required to reach room temperature is greatly reduced.
【0012】なお、上記実施例における加熱炉1に対向
開口する通風筒5の位置を、輻射シールド3の一層下方
にすることにより、ヒータ線2の局所的な冷却を排し、
全域を均一に冷却することができるので、降温分析時の
ベースライン変動を小さくして分析精度を向上させるこ
とが期待できる。By setting the position of the ventilation tube 5 facing the heating furnace 1 in the above embodiment to be further below the radiation shield 3, local cooling of the heater wire 2 is eliminated.
Since the entire area can be uniformly cooled, it can be expected that the baseline fluctuation at the time of cooling analysis is reduced and the analysis accuracy is improved.
【0013】[0013]
【考案の効果】本考案は、以上説明したように構成さ
れ、加熱炉に対向開口する通風筒を通じて冷却用空気を
導入するので、加熱炉(炉心管)を効率よく冷却するこ
とができ、試料温度を下げていく降温分析において降温
速度を大きくすることも可能となる。また、この通風筒
内に送風によって跳ね上がる反射板が設けられているの
で、温度上昇中における炉心管からの輻射熱が遮られて
外部に放射されることが少なく、ブロア装置が過熱され
るのを防ぐことができる。[Effect of the Invention] The present invention is configured as described above, and the cooling air is introduced through the ventilation tube facing the heating furnace, so that the heating furnace (core tube) can be cooled efficiently and the sample can be cooled. It is also possible to increase the cooling rate in the cooling analysis for decreasing the temperature. In addition, since the reflecting plate which is flipped up by blowing air is provided in the ventilation tube, radiant heat from the furnace tube during the temperature rise is less likely to be interrupted and radiated to the outside, thereby preventing the blower device from being overheated. be able to.
【図1】本考案の熱分析装置の縦断面略図である。FIG. 1 is a schematic longitudinal sectional view of the thermal analyzer of the present invention.
【図2】本考案の熱分析装置の平面略図である。FIG. 2 is a schematic plan view of the thermal analyzer of the present invention.
1…加熱炉(炉芯管) 3…輻射シール
ド 4…断熱カバー 5…通風筒 6…ブロア装置 7…反射板 S…試料 R…参照試料DESCRIPTION OF SYMBOLS 1 ... Heating furnace (furnace tube) 3 ... Radiation shield 4 ... Heat insulation cover 5 ... Ventilation tube 6 ... Blower device 7 ... Reflector S ... Sample R ... Reference sample
Claims (1)
外周を取り囲む輻射シールドと、更にシールドの外周を
取り囲んで配置された断熱カバーとから成る熱分析装置
において、前記断熱カバー及び輻射シールドを貫通して
前記加熱炉に対向開口する通風筒と、この通風筒内に通
風によって跳ね上がる反射板を設け、この通風筒を通じ
て冷却用空気を導入する冷却装置を備えたことを特徴と
する熱分析装置。1. A thermal analysis apparatus comprising a heating furnace in which a sample is placed, a radiation shield surrounding the outer periphery thereof, and a heat insulating cover arranged further surrounding the outer periphery of the shield. And a cooling device for introducing a cooling air through the ventilation tube, wherein a ventilation plate which penetrates the heating furnace and is open to the heating furnace is provided, and a reflection plate which jumps up by ventilation is provided in the ventilation tube. apparatus.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1897893U JP2585776Y2 (en) | 1993-04-14 | 1993-04-14 | Thermal analyzer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1897893U JP2585776Y2 (en) | 1993-04-14 | 1993-04-14 | Thermal analyzer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0678857U JPH0678857U (en) | 1994-11-04 |
JP2585776Y2 true JP2585776Y2 (en) | 1998-11-25 |
Family
ID=11986717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1897893U Expired - Fee Related JP2585776Y2 (en) | 1993-04-14 | 1993-04-14 | Thermal analyzer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2585776Y2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2832520B2 (en) * | 1995-03-27 | 1998-12-09 | 理学電機株式会社 | Sample heating device for thermal analyzer |
JP2011141147A (en) * | 2010-01-06 | 2011-07-21 | Sumitomo Wiring Syst Ltd | Fire retardancy testing equipment |
-
1993
- 1993-04-14 JP JP1897893U patent/JP2585776Y2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0678857U (en) | 1994-11-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |