JPS6133559Y2 - - Google Patents
Info
- Publication number
- JPS6133559Y2 JPS6133559Y2 JP9119978U JP9119978U JPS6133559Y2 JP S6133559 Y2 JPS6133559 Y2 JP S6133559Y2 JP 9119978 U JP9119978 U JP 9119978U JP 9119978 U JP9119978 U JP 9119978U JP S6133559 Y2 JPS6133559 Y2 JP S6133559Y2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- sample
- physical property
- detector
- heating
- 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
Links
- 230000000704 physical effect Effects 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000013021 overheating Methods 0.000 claims description 6
- 238000002076 thermal analysis method Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000008602 contraction Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004455 differential thermal analysis Methods 0.000 description 1
- 238000004442 gravimetric analysis Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 206010027175 memory impairment Diseases 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Description
【考案の詳細な説明】
Ａ 産業上の利用分野
この考案は温度を変えていくことにより物質の
何らかの物性ろ変化を検出して分析する熱分析装
置で、特に試料の過大な変化により機器を損傷す
る恐れがある場合に、これを自動的に防止する熱
分析装置の過熱防止装置に関する。[Detailed explanation of the invention] A. Industrial application field This invention is a thermal analysis device that detects and analyzes changes in physical properties of substances by changing the temperature. The present invention relates to an overheating prevention device for a thermal analyzer that automatically prevents overheating when there is a risk of overheating.
Ｂ 従来の技術
従来の熱分析装置、例えば熱膨張による分析を
行うものでは、試料の伸び縮みを記録計ペンの動
きで観察し、ペンの過大（異常）な動きにより、
機器が損傷する危険があることを感知していた。B. Prior Art In conventional thermal analysis devices, such as those that perform analysis using thermal expansion, the expansion and contraction of a sample is observed by the movement of a recorder pen, and excessive (abnormal) movement of the pen causes
It was sensed that there was a risk of equipment damage.
第１図は従来の熱分析装置の要部の電気回路図
の例で、記録計に設けられた常閉の温度リミツト
スイツチL1が閉の状態で主開閉器Scが閉じられ
ると、リレーコイルRrが付勢されて加熱開閉器
SHが閉じられ、加熱手段Ｈの電力が供給され、
試料（図示されていない）の温度は上昇させられ
る。試料の温度と共に記録ペンが動いて、リミツ
トスイツチL1が設定されている温度に達すると
リミツトスイツチL1が開きリレーコイルRrの付
勢が断たれ、加熱開閉器SHが開かれ、加熱手段
Ｈへの電力が断たれる。 Figure 1 is an example of an electrical circuit diagram of the main parts of a conventional thermal analyzer.When the main switch Sc is closed with the normally closed temperature limit switch L1 provided in the recorder closed, the relay coil Rr is energized and heated switch
SH is closed, power is supplied to the heating means H,
The temperature of the sample (not shown) is increased. The recording pen moves with the temperature of the sample, and when limit switch L1 reaches the set temperature, limit switch L1 opens to cut off the energization of relay coil Rr, and heating switch SH opens to disconnect heating means H. Power is cut off.
Ｃ 考案が解決しようとす問題点
しかしながら、例えば粘土などの試料の熱膨脹
測定をおこなうと、第２図のように初め少し膨脹
をし、次に脱水等により収縮が生じる（ａ点）。
この後温度が上昇するにつれて再び膨脹し、つい
には軟化あるいは溶解して伸びは減少する（ｂ
点）。試料が軟化・溶解すれば装置内に付着して
損傷のおそれがあるので、測定者は測定中装置に
つききりで試料の伸びの状態を監視し、第２段の
膨脹のピークを観察されると、手動で加熱開閉器
（SH）を開く操作をおこなつて試料の過熱に基づ
く装置の損傷を防止していた。従つて、操作が煩
らわしく、また錯誤や忘却によつて、測定ミスを
起こしたら、損傷の防止を実現できなかつたりす
るという問題があつた。C. Problems that the invention aims to solve However, when measuring the thermal expansion of a sample such as clay, as shown in Figure 2, it initially expands a little, and then shrinks due to dehydration etc. (point a).
After this, as the temperature rises, it expands again, and finally softens or melts and the elongation decreases (b
point). If the sample softens or dissolves, it may stick to the inside of the device and cause damage, so the measurer should monitor the state of sample elongation during the measurement, and when the second stage expansion peak is observed. The heating switch (SH) was opened manually to prevent damage to the equipment due to overheating of the sample. Therefore, there are problems in that the operation is cumbersome, and if a measurement error occurs due to an error or forgetfulness, it may not be possible to prevent damage.
Ｄ 問題点を解決するための手段
この考案は上述の問題点を解決する熱分析装置
の過熱防止装置を提供しようとするものであり、
構成の要部とするところは、加熱手段で加熱され
る試料の温度変化に伴う物性の対温度特性を測定
して試料の分析を行う熱分析装置において、予め
設定した値に前記試料の温度が達したことを検知
する温度検知器と、測定している試料の物性の変
化が予め設定した値に達したことを検知する物性
検知器と、前記温度検知器からの検知信号および
物性検知器からの検知信号の双方の検知信号を受
けて信号を発する電気回路とを備え、この電気回
路からの信号により前記加熱手段の加熱を停止す
ることを特徴とする。D. Means for Solving the Problems This invention aims to provide an overheating prevention device for a thermal analyzer that solves the above-mentioned problems.
The main part of the configuration is that in a thermal analysis device that analyzes a sample by measuring the temperature characteristics of the physical properties of the sample heated by a heating means as the temperature changes, the temperature of the sample is adjusted to a preset value. A temperature sensor detects when the temperature has reached a preset value, a physical property detector detects when the change in the physical property of the sample being measured reaches a preset value, and a detection signal from the temperature sensor and from the physical property detector. and an electric circuit that receives both of the detection signals and generates a signal, and the heating of the heating means is stopped in response to a signal from the electric circuit.
Ｅ 作 用
温度検知器と物性検知器双方からの検知信号が
あつて初めて加熱手段の加熱を停止する電気回路
を設けたので、温度検知器が設定温度を検知しな
いうは、物性検知の動作にかかわらず加熱を続
け、前記設定温度が検知された後は前記物性検知
器の動作により加熱が停止される。E Function We have installed an electric circuit that stops the heating of the heating means only when detection signals from both the temperature detector and the physical property detector are received. After the set temperature is detected, the heating is stopped by the operation of the physical property detector.
Ｆ 実施例
以下この考案の１実施例について説明する。第
３図は、この考案の１実施例の熱分析装置の要部
説明図を示す。物性検知器は物性上限値検知器Ｍ
と物性下限値検知器Ｎとからなり、それぞれの検
知器の動作により、リミツトスイツチL2，L3が
開閉制御される。この物性上限値検知器Ｍおよび
物性下限値検知器Ｎは、例えば、記録計のペンの
走行方向の上下端にペンによつて開閉動作される
マイクロスイツチをそれぞれ設けると共に、この
マイクロスイツチによつて附勢されるリレーとよ
りなり、そしてこのリレーの接点が２個のリミツ
トスイツチL2，L3に相当する。リミツトスイツ
チL2は物性上限値検知器Ｍが試料の物性変化の
上限を検出したときに開成し、一方リミツトスイ
ツチL3は物性下限値検知器Ｎが試料の物性変化
の下限を検出したときに開成する。そしてリミツ
トスイツチL2，L3は直列に接続され、さらに、
この直列接続に温度リミツトスイツチL1を並列
に接続する。そして測定が試料の膨脹を調べるも
のであるときには物性上限値検知器Ｍの上限は膨
脹時の測定可能（測定する意味のある）な限度の
伸びの上限値Ｕに設定し、他方の物性下限値検知
器Ｎは収縮時の伸びの下限値ｌに設定する。F Example One example of this invention will be described below. FIG. 3 shows an explanatory view of the main parts of a thermal analysis apparatus according to one embodiment of this invention. The physical property detector is the physical property upper limit value detector M.
and a physical property lower limit value detector N, and the opening and closing of limit switches L 2 and L 3 are controlled by the operation of each detector. The physical property upper limit value detector M and the physical property lower limit value detector N are, for example, provided with micro-switches that are opened and closed by the pen at the upper and lower ends of the pen of the recorder in the running direction, respectively, and are operated by the micro-switches. It consists of a relay to be energized, and the contacts of this relay correspond to two limit switches L 2 and L 3 . The limit switch L2 is opened when the physical property upper limit value detector M detects the upper limit of the physical property change of the sample, while the limit switch L3 is opened when the physical property lower limit value detector N detects the lower limit of the physical property change of the sample. . Limit switches L 2 and L 3 are connected in series, and further,
A temperature limit switch L1 is connected in parallel to this series connection. When the measurement is to investigate the expansion of the sample, the upper limit of the physical property upper limit value detector M is set to the upper limit of elongation U that is measurable (meaningful to measure) during expansion, and the lower limit of the other physical property is set to The detector N is set to the lower limit l of elongation during contraction.
一般には試料の温度のいかんにかかわらず上限
値Ｕと下限値ｌとのそれぞれでリミツトスイツチ
L2，L3も動作させても差支えないと予想される
が第２図のように初期の収縮ａが大きく下限値ｌ
以下になる場合もある。しかし、この場合は試料
温度が未だ低いので、更に測定をつづけるために
加熱は続ける必要があり、温度リミツトスイツチ
L1でリレーコイルRrの付勢は保持するようにし
てある。他方軟化・溶解を生じる温度領域に試料
温度が達しているときに収縮が生じ、それが下限
値ｌ以下になると直ちに試料の加熱を断つ必要が
あり、温度リミツトスイツチL1が開の状態では
下限値ｌ用のリミツトスイツチL3の開路によつ
てリレーコイルRrが断たれ、加熱開閉器SHが開
かれ、加熱手段の電力が断たれる。 Generally, a limit switch is set at each of the upper limit value U and lower limit value l regardless of the temperature of the sample.
It is expected that there will be no problem even if L 2 and L 3 are operated, but as shown in Figure 2, the initial contraction a is large and the lower limit l
It may be below. However, in this case, the sample temperature is still low, so it is necessary to continue heating in order to continue measurement, and the temperature limit switch is activated.
The energization of relay coil Rr is maintained at L1 . On the other hand, shrinkage occurs when the sample temperature reaches the temperature range that causes softening and melting, and if it falls below the lower limit value l, it is necessary to immediately cut off the heating of the sample, and when the temperature limit switch L1 is open, the lower limit value By opening the limit switch L3 for L, the relay coil Rr is cut off, the heating switch SH is opened, and the power to the heating means is cut off.
通常は下限値ｌのリミツトスイツチL3のみで
よいと予想されるが、試料の膨脹が過大になると
記録計のスケールオーバーを生じて、これ以上の
測定は無意味であり、また記録計を損傷させるお
それもある。これらの物性の変化すなわち伸びの
上限値・下限値ならびにこれらを生じる温度範囲
はそれぞれの試料についてあらかじめ予想するこ
とができるのでそれぞれの値を設定することがで
きる。 Normally, it is expected that only the limit switch L3 with the lower limit value l is required, but if the sample expands too much, the recorder will overscale, making further measurements meaningless and damaging the recorder. There is also a risk. Changes in these physical properties, that is, the upper and lower limits of elongation and the temperature range in which these occur can be predicted in advance for each sample, and therefore the respective values can be set.
第４図に上記実施列における温度リミツトスイ
ツチL1、上限リミツトスイツチL2、下限リミツ
トスイツチL3ならびにリレーコイルRrのそれぞ
れの動作の状態を第２図に対照させて横軸方向に
試料の温度をとつて示してある。また第２図と共
通の符号が付してある。 FIG. 4 shows the operating states of the temperature limit switch L 1 , upper limit switch L 2 , lower limit switch L 3 and relay coil Rr in the above-mentioned row in comparison with FIG. 2, and the temperature of the sample is measured in the horizontal axis direction. It is shown. Also, the same reference numerals as in FIG. 2 are given.
以上のようにこの考案のものは物性の変化の上
限と下限とで動作するリミツトスイツチL2，L3
をたがいに直列に接続し、さらに設定温度を検知
して回路を開く温度リミツトスイツチL1に前記
上限と下限のリミツトスイツチL2，L3の組合せ
に並列に接続することにより設定温度以下では、
下限値を超えても加熱を続行し、設定温度以上で
は上限値および下限値を超えると加熱手段の加熱
を断つようにしてある。 As mentioned above, the device of this invention is a limit switch L 2 , L 3 that operates at the upper and lower limits of change in physical properties.
are connected in series to each other, and the temperature limit switch L1 , which detects the set temperature and opens the circuit, is connected in parallel to the combination of upper and lower limit switches L2 and L3 .
Heating is continued even if the lower limit value is exceeded, and heating by the heating means is cut off when the upper limit value and the lower limit value are exceeded at a temperature higher than the set temperature.
上記の温度ならびに伸びの上下のリミツト信号
をうる記録計はＸ−Ｙレコーダ、ストリツチチヤ
ートレコーダ、デジタルレコーダ等の何れを用い
てもこの考案の実現は可能である。 The present invention can be realized by using any of the above recorders such as an X-Y recorder, a stretcher recorder, a digital recorder, etc., which receive the upper and lower limit signals of temperature and elongation.
上記実施例にあつては温度検知器として、温度
リミツトスイツチL1、上限および下限のそれぞ
れの変化検知器としてリミツトスイツチL2，L3
等開閉動作によるものがそれぞれ用いられている
が、これら以外で試料の物性の変化を電気信号に
変換して、それぞれの設定値において、検知信号
を発するものを用いることも勿論可能で、またア
ナログ信号以外デジタル信号においてもこの考案
のものは実現できる。したがつてこの考案のもの
は上記実施例の熱膨脹分析の外熱重量分析、示差
熱分析等においても上記と同様に実施することが
可能である。 In the above embodiment, a temperature limit switch L 1 is used as a temperature sensor, and limit switches L 2 and L 3 are used as upper and lower limit change detectors, respectively.
In addition to these methods, it is also possible to use methods that convert changes in the physical properties of the sample into electrical signals and emit detection signals at each set value. This invention can also be realized with digital signals other than signals. Therefore, this invention can be implemented in the same manner as above in the thermal expansion analysis of the above embodiment, such as ectothermal gravimetric analysis, differential thermal analysis, etc.
Ｇ 考案の効果
この考案の効果は以上詳述したように、簡単な
構成を用いて、試料の物性の変化のために機器を
損傷するおそれを生じる危険温度範囲に達した
際、予め設定した物性の変化値の上限および下限
値を物性の変化が超えると自動的に試料の加熱を
断つて機器の損傷を防止し、測定者の操作の簡易
化ならびに誤操作の防止をした熱分析装置を実現
しうるものである。G. Effect of the invention As detailed above, the effect of this invention is that it uses a simple configuration to prevent the physical properties set in advance from changing when the physical properties of the sample reach a dangerous temperature range that could cause damage to the equipment. When the change in physical properties exceeds the upper and lower limits of the change value of It is something that can be used.
第１図は従来の熱膨脹分析装置の例の要部電気
回路図、第２図は熱膨脹の説明図、第３図はこの
考案の１実施例の熱膨脹分析装置の要部電気回路
図、第４図は第３図のものの動作説明図である。
SH：加熱開閉器、L1：温度リミツトスイツ
チ、L2：上限リミツトスイツチ、L3：下限リミ
ツトスイツチ、Rr：リレーコイル、Ｈ：加熱手
段、Ｍ：物性上限値検知器、Ｎ：物性下限値検知
器。
Fig. 1 is an electrical circuit diagram of a main part of an example of a conventional thermal expansion analyzer, Fig. 2 is an explanatory diagram of thermal expansion, Fig. 3 is an electrical circuit diagram of a main part of a thermal expansion analyzer according to an embodiment of this invention, and Fig. 4 is an electrical circuit diagram of a main part of an example of a conventional thermal expansion analyzer. This figure is an explanatory diagram of the operation of the one shown in FIG. 3. SH: Heating switch, L1 : Temperature limit switch, L2 : Upper limit switch, L3 : Lower limit switch, Rr: Relay coil, H: Heating means, M: Physical property upper limit value detector, N: Physical property lower limit value detector.
Claims (1)
性の対温度特性を測定して試料の分析を行う熱分
析装置において、予め設定した値に前記試料の温
度が達したことを検知する温度検知器と、測定し
ている試料の物性の変化が予め設定した値に達し
たことを検知する物性検知器と、前記温度検知器
からの検知信号および物性検知器からの検知信号
の双方の検知信号を受けて信号を発する電気回路
とを備え、この電気回路からの信号により前記加
熱手段の加熱を停止することを特徴とする熱分析
装置の過熱防止装置。 A temperature detector that detects when the temperature of the sample has reached a preset value in a thermal analysis device that analyzes the temperature characteristics of the physical properties of the sample that are heated by a heating means as the sample changes in temperature. and a physical property detector that detects that a change in the physical property of the sample being measured has reached a preset value, and a detection signal from both the temperature sensor and the physical property detector. 1. An overheating prevention device for a thermal analysis apparatus, comprising: an electric circuit that receives a signal and generates a signal, and stops heating of the heating means in response to a signal from the electric circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9119978U JPS6133559Y2 (en) | 1978-06-30 | 1978-06-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9119978U JPS6133559Y2 (en) | 1978-06-30 | 1978-06-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS559423U JPS559423U (en) | 1980-01-22 |
| JPS6133559Y2 true JPS6133559Y2 (en) | 1986-10-01 |
Family
ID=29020250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9119978U Expired JPS6133559Y2 (en) | 1978-06-30 | 1978-06-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6133559Y2 (en) |
-
1978
- 1978-06-30 JP JP9119978U patent/JPS6133559Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS559423U (en) | 1980-01-22 |
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