JPS6350653B2 - - Google Patents
Info
- Publication number
- JPS6350653B2 JPS6350653B2 JP19167282A JP19167282A JPS6350653B2 JP S6350653 B2 JPS6350653 B2 JP S6350653B2 JP 19167282 A JP19167282 A JP 19167282A JP 19167282 A JP19167282 A JP 19167282A JP S6350653 B2 JPS6350653 B2 JP S6350653B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- combustion gas
- gas
- ignition
- introduction pipe
- 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
- 239000007789 gas Substances 0.000 claims description 35
- 239000000567 combustion gas Substances 0.000 claims description 20
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000000889 atomisation Methods 0.000 claims description 2
- 206010016754 Flashback Diseases 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/72—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using flame burners
Landscapes
- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【発明の詳細な説明】
この発明は、フレーム原子化部を備えた原子吸
光分析装置のガス制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas control device for an atomic absorption spectrometer equipped with a flame atomization section.
フレーム原子吸光分析装置では、燃焼ガス導入
管にガス漏れが発生していると、点火時に逆火爆
発を起す危険があるので、従来はこのガス漏れチ
エツクを定期的に行つていたが、この定期チエツ
ク時以外の時にガス漏れが発生している場合には
チエツクが出来ず、したがつてこれを知らずに点
火して逆火爆発を起す事故があつた。 In the flame atomic absorption spectrometer, if there is a gas leak in the combustion gas inlet pipe, there is a risk of flashback explosion occurring during ignition, so conventionally this gas leak check was carried out periodically. If a gas leak occurs at a time other than a regular check, it cannot be checked, and there have been accidents where the gas has ignited without being noticed and caused a flashback explosion.
この発明は上記の事情に鑑み、このような危険
を除くことを目的としてなされたもので、常時燃
焼ガス配管流路内のガス洩れをチエツクし、ガス
洩れが発生している時には点火できないよう構成
されてなる原子吸光分析装置を提供するものであ
る。 In view of the above-mentioned circumstances, this invention was made with the aim of eliminating such dangers, and is designed to constantly check for gas leaks in the combustion gas piping flow path, and to prevent ignition when gas leaks occur. The present invention provides an atomic absorption spectrometer comprising the following methods.
以下、この発明を図面の実施例に基づいて説明
する。 Hereinafter, the present invention will be explained based on embodiments shown in the drawings.
第１図はこの発明に係る原子吸光分析装置のガ
ス制御装置の概要を示す説明図で、ガス源１より
供給された燃焼ガスは圧力調整器２により所定の
圧力に調整されたうえで配管部Ａを通つてバーナ
３に供給される。この配管部Ａの燃焼ガス導入管
の入口側および出口側には、閉成時に入口側のも
のが出口側のものに対して一定の遅延時間差をも
つて動作する開閉弁V1，V2が設けられ、その間
に燃焼ガス導入管内のガス圧力を検知する圧力検
知器４が接続されている。この圧力検知器４は設
定された一定幅の圧力値（PL〜PH．ただしPL＜
PH）と燃焼ガス導入管内のガス圧力を比較し、
ガス圧力がPL以上だとその比較信号により点火
スイツチS2を制御する待機スイツチS3はONにな
り、他方PL以下だとOFF状態が維持されるよう
になつている。開閉弁V1，V2の動作を制御する
のが動作部Ｂであり、そのシーケンスを第２図に
示す。 FIG. 1 is an explanatory diagram showing the outline of a gas control device for an atomic absorption spectrometer according to the present invention, in which combustion gas supplied from a gas source 1 is adjusted to a predetermined pressure by a pressure regulator 2, and then A is supplied to the burner 3 through A. On the inlet and outlet sides of the combustion gas introduction pipe of piping section A, there are on-off valves V 1 and V 2 that operate with a certain delay time difference between the inlet side and the outlet side when closed. A pressure sensor 4 for detecting the gas pressure in the combustion gas introduction pipe is connected between the two. This pressure detector 4 detects pressure values within a set constant range (P L ~ P H . However, P L <
P H ) and the gas pressure in the combustion gas introduction pipe,
When the gas pressure is above P L , the standby switch S3, which controls the ignition switch S2 , is turned ON based on the comparison signal, and when it is below P L , the standby switch S3 is kept in the OFF state. The operation section B controls the operation of the on-off valves V1 and V2 , and the sequence thereof is shown in FIG.
第１図および第２図において、パワースイツチ
S1をONにすると、閉成状態の開閉弁V1，V2は、
タイマーＴで設定された時間だけ入口側の開閉弁
V1が閉成されるのに対し出口側の開閉弁V2は閉
成されたままである。したがつて、その間に燃焼
ガスが燃焼ガス導入管内に流れ込み一定圧の燃焼
ガスが封入される。そして燃焼ガス導入管内のガ
ス圧が圧力検知器４の設定圧PHより高くなると
待機スイツチS3がONになり、点火可能な状態に
なる。すなわち、点火操作により点火スイツチS2
がONになると開閉弁V1，V2が閉成され、燃焼
ガスがバーナ３に供給される。逆に封入した時配
管内にガス洩れ箇所があると、封入されたガスの
圧力はしだいに低下し、圧力検知器４の設定圧
PL以下になると待機スイツチS3はOFFになる。
この場合には点火操作により点火スイツチS2を
ONにしても開閉弁V1，V2は開成されず、燃焼
ガスはバーナ３に供給されない。なお、５，６は
開閉弁V1，V2の駆動回路である。 In Figures 1 and 2, the power switch
When S 1 is turned ON, on-off valves V 1 and V 2 in the closed state are
The on-off valve on the inlet side only for the time set by timer T.
While V 1 is closed, the outlet side on-off valve V 2 remains closed. Therefore, during this time, the combustion gas flows into the combustion gas introduction pipe, and the combustion gas is sealed at a constant pressure. Then, when the gas pressure in the combustion gas introduction pipe becomes higher than the set pressure P H of the pressure detector 4, the standby switch S3 is turned on and the ignition becomes possible. In other words, the ignition switch S 2 is activated by the ignition operation.
When turned on, the on-off valves V 1 and V 2 are closed, and combustion gas is supplied to the burner 3. Conversely, if there is a gas leak in the piping when the gas is sealed, the pressure of the sealed gas will gradually decrease and the set pressure of the pressure detector 4 will decrease.
When the temperature drops below P L , the standby switch S3 turns OFF.
In this case, turn ignition switch S 2 by ignition operation.
Even if it is turned ON, the on-off valves V 1 and V 2 are not opened, and combustion gas is not supplied to the burner 3. Note that 5 and 6 are drive circuits for the on-off valves V 1 and V 2 .
点火時におけるガス洩れチエツクは以上のとお
りである。次に消火時におけるガス洩れチエツク
について説明する。 The gas leak check at the time of ignition is as described above. Next, we will explain how to check for gas leaks when extinguishing a fire.
まず、点火状態から消火操作により点火スイツ
チS2をOFFにすると、開閉弁V2が閉成され、一
定の遅延時間経過後に開閉弁V1が閉成される。
これにより燃焼ガス導入管内にはガスが封入され
ることになり、内部のガス圧が設定圧PH以上で
あれば点火スイツチS2をONにすることにより再
点火でき、他方ガス洩れにより内部のガス圧が設
定圧PL以下になつた場合には点火できなくなる。 First, when the ignition switch S 2 is turned OFF by extinguishing the ignition state, the on-off valve V 2 is closed, and after a certain delay time, the on-off valve V 1 is closed.
As a result, gas is sealed in the combustion gas introduction pipe, and if the internal gas pressure is higher than the set pressure P H , it can be re-ignited by turning on the ignition switch S 2. On the other hand, due to gas leakage, the internal If the gas pressure falls below the set pressure P L , ignition will no longer be possible.
以上の実施例において、ガス洩れチエツクの精
度を上げるには、圧力検知器４の設定圧の幅
（PH−PL）の小さいものを選びかつ封入ガスの圧
力がPHよりあまり大きくならないように圧力調
整器２により封入ガス圧を設定すればよい。 In the above embodiment, in order to improve the accuracy of gas leakage check, select a pressure detector 4 with a small set pressure range (P H - P L ) and make sure that the pressure of the sealed gas does not become much larger than P H. The pressure of the sealed gas may be set using the pressure regulator 2.
また、ガス導入管内の容積を小さくし、検知時
間を長くとつても精度は上がる。 Furthermore, accuracy can be improved by reducing the volume inside the gas introduction pipe and increasing the detection time.
なお、点火中ガス導入管に供給される燃焼ガス
の圧力が低下したり、あるいは突発的に大きなガ
ス洩れが発生し、内部の圧力が設定圧PL以下に
なれば、バーナ３へのガス供給が断たれることは
いうまでもない。 Furthermore, if the pressure of the combustion gas supplied to the gas introduction pipe during ignition decreases, or if a large gas leak suddenly occurs and the internal pressure falls below the set pressure P L , the gas supply to burner 3 will be interrupted. Needless to say, this will be cut off.
この発明は以上説明したように、常時ガス洩れ
チエツクを行ない、ガス洩れが発生しているとき
にはたとえ点火スイツチをONにしても点火でき
ないように構成されているので、ガス洩れによる
逆火爆発の事故を防ぐ効果がある。 As explained above, this invention is configured to constantly check for gas leaks and prevent ignition even if the ignition switch is turned on when gas leaks occur, thereby preventing flashbacks and explosions due to gas leaks. It has the effect of preventing
第１図はこの発明に係る原子吸光分析装置のガ
ス制御装置の概要説明図、第２図は第１図の各要
素の作動シーケンスを示す図である。
V1，V2…開閉弁、S2…点火スイツチ、S3…待
機スイツチ、Ｔ…タイマ、１…ガス源、３…バー
ナ、４…圧力検知器。
FIG. 1 is a schematic explanatory diagram of a gas control device for an atomic absorption spectrometer according to the present invention, and FIG. 2 is a diagram showing the operation sequence of each element in FIG. 1. V1 , V2 ...Open/close valve, S2 ...Ignition switch, S3 ...Standby switch, T...Timer, 1...Gas source, 3...Burner, 4...Pressure detector.
Claims (1)
にバーナで燃焼させて原子化を行う原子化部を備
えた原子吸光分析装置において、前記燃焼ガス導
入管の入口側および出口側に開閉弁を設けると共
に該開閉弁間に前記燃焼ガス導入管内の燃焼ガス
圧と設定圧力値との比較信号を出す圧力検知器を
設け、かつONにより前記両開閉弁を開成する点
火スイツチ回路を前記圧力検知器からの信号によ
りON／OFFする待機スイツチおよび点火操作に
あたり前記入口側開閉弁を一定時間開成させるタ
イマーを備えて成り、前記タイマーの動作によつ
て前記燃焼ガス導入管に導入された燃焼ガス圧が
設定圧力値以上のときのみ前記圧力検知器よりの
信号により前記待機スイツチを動作させ点火スイ
ツチ回路をONにして点火可能な状態にすること
を特徴とする原子吸光分析装置。1. In an atomic absorption spectrometer equipped with an atomization unit that atomizes an atomized sample by burning it in a burner together with a combustion gas and an auxiliary gas, an on-off valve is provided on the inlet side and the outlet side of the combustion gas introduction pipe, and A pressure sensor is provided between the on-off valves to output a comparison signal between the combustion gas pressure in the combustion gas introduction pipe and a set pressure value, and an ignition switch circuit that opens both the on-off valves when turned on is connected from the pressure sensor. It is equipped with a standby switch that turns on and off in response to a signal, and a timer that opens the inlet side on-off valve for a certain period of time during ignition operation, and the combustion gas pressure introduced into the combustion gas introduction pipe by the operation of the timer is set to the set pressure. An atomic absorption spectrometer characterized in that only when the pressure exceeds a value, the standby switch is activated by a signal from the pressure detector, and an ignition switch circuit is turned on to enable ignition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19167282A JPS5979838A (en) | 1982-10-29 | 1982-10-29 | Atomic absorption analytical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19167282A JPS5979838A (en) | 1982-10-29 | 1982-10-29 | Atomic absorption analytical apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5979838A JPS5979838A (en) | 1984-05-09 |
| JPS6350653B2 true JPS6350653B2 (en) | 1988-10-11 |
Family
ID=16278534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19167282A Granted JPS5979838A (en) | 1982-10-29 | 1982-10-29 | Atomic absorption analytical apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5979838A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005221397A (en) * | 2004-02-06 | 2005-08-18 | Hitachi Naka Instruments Co Ltd | Atomic absorption spectrophotometer |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2541058B2 (en) * | 1991-11-07 | 1996-10-09 | 株式会社島津製作所 | Frame atomic absorption spectrometer |
| JP4821636B2 (en) * | 2007-01-17 | 2011-11-24 | 株式会社島津製作所 | Atomic absorption spectrophotometer |
-
1982
- 1982-10-29 JP JP19167282A patent/JPS5979838A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005221397A (en) * | 2004-02-06 | 2005-08-18 | Hitachi Naka Instruments Co Ltd | Atomic absorption spectrophotometer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5979838A (en) | 1984-05-09 |
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