JP2746988B2 - Pressure relief device and its control device - Google Patents
Pressure relief device and its control deviceInfo
- Publication number
- JP2746988B2 JP2746988B2 JP4858489A JP4858489A JP2746988B2 JP 2746988 B2 JP2746988 B2 JP 2746988B2 JP 4858489 A JP4858489 A JP 4858489A JP 4858489 A JP4858489 A JP 4858489A JP 2746988 B2 JP2746988 B2 JP 2746988B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- release plate
- pressure release
- relief device
- resistor
- 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 - Lifetime
Links
Landscapes
- Measuring Fluid Pressure (AREA)
- Safety Valves (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、圧力容器または蒸気配管などの安全装置に
係り、特に圧力開放板の経年変化に起因する低圧時の開
放現象の予知と前記開放時の検出に好適な圧力開放器お
よびその制御装置に関する。Description: BACKGROUND OF THE INVENTION The present invention relates to a safety device such as a pressure vessel or a steam pipe, and more particularly to a prediction of an opening phenomenon at a low pressure due to aging of a pressure release plate and the opening. The present invention relates to a pressure relief device suitable for detecting time and a control device thereof.
（従来の技術） 第５図（ａ）、（ｂ）は従来技術の圧力開放板の平面
図と断面図を示し、開放板２′は外側ガスケット7aと内
側ガスケット7bの間に、トップメタル2F、シール2E、シ
ール保護カバー2D、ボトムメタル2C、グラフォイルシー
ル保護カバー2B、グラフォイルスリットカバー2Aを順に
重層させたものであり、これを図示しないフランジ間に
装着固定して使用する。このような圧力開放板２′は、
小型で構造が簡単、取扱いが容易であり、内部可燃性ガ
スによる爆発等の異常圧力の発生時は、速やかに確実に
破裂して圧力を開放するという特性を有する。(Prior Art) FIGS. 5 (a) and 5 (b) show a plan view and a cross-sectional view of a conventional pressure release plate. A release plate 2 'is provided between an outer gasket 7a and an inner gasket 7b. , A seal 2E, a seal protective cover 2D, a bottom metal 2C, a Grafoil seal protective cover 2B, and a Grafoil slit cover 2A, which are sequentially laminated, and are used by being fixed between flanges (not shown). Such a pressure release plate 2 ′
It is small in size, simple in structure and easy to handle, and has the characteristic that when an abnormal pressure such as an explosion due to an internal flammable gas occurs, it bursts quickly and reliably to release the pressure.
（発明が解決しようとする課題） 上記従来技術は、圧力容器または配管内の媒体圧力の
上昇、下降の繰返しにより圧力開放板を構成する材料が
疲労して耐力が低下し、規定圧力以下の比較的低圧力で
開放され、異常圧力を検出するという安全装置としての
本来の機能を喪失して信号等の警報による制御が不可能
となり、操業効率が低下する問題点があった。本発明は
従来技術の上記課題を解決し、前記低圧開放現象の予知
と低圧開放時の検出に好適な圧力開放板およびこれを利
用した制御装置を提供することを目的とするものであ
る。(Problems to be Solved by the Invention) In the above-mentioned conventional technology, the material constituting the pressure release plate is fatigued due to repeated increase and decrease of the medium pressure in the pressure vessel or the pipe, and the proof stress is reduced. It is opened at a very low pressure and loses its original function as a safety device for detecting abnormal pressure, so that it is impossible to control by a warning such as a signal and the operation efficiency is reduced. An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a pressure release plate suitable for predicting the low pressure release phenomenon and detecting when the low pressure is released, and a control device using the same.
（課題を解決するための手段） 上記の目的は、フランジの間に重層して固定された圧
力開放板と、前記圧力開放板の前記層間に配設した圧力
センサ、例えばブリッジ回路を構成する抵抗体を組み込
んだ圧力開放器および前記圧力容器の内部圧力を検出す
る圧力伝送器と、前記圧力開放器からの入力信号と前記
圧力伝送路からの入力信号を比較演算する関数発生器
と、前記関数発生器の出力に応じて警報を発する圧力開
放器の制御装置によって達成される。(Means for Solving the Problems) An object of the present invention is to provide a pressure release plate fixedly layered between flanges, and a pressure sensor disposed between the layers of the pressure release plate, for example, a resistor constituting a bridge circuit. A pressure release device incorporating a body, a pressure transmitter for detecting the internal pressure of the pressure vessel, a function generator for comparing and calculating an input signal from the pressure release device and an input signal from the pressure transmission line, and the function This is achieved by a pressure relief controller which issues an alarm in response to the output of the generator.
（作用） 上記の構成により、圧力開放板は経年変化により変形
すると、これに伴って圧力開放板の重層内に組み込まれ
た圧力センサ、例えばブリッジ回路を構成する抵抗体の
抵抗線が伸長して断面が細くなると電気抵抗値が増加す
る。この変化による不平衡電流値の大小を判別して警報
を発することが可能である。(Operation) According to the above configuration, when the pressure release plate is deformed due to aging, a pressure sensor incorporated in the layer of the pressure release plate, for example, a resistance wire of a resistor constituting a bridge circuit is extended. As the cross section becomes thinner, the electric resistance increases. It is possible to determine the magnitude of the unbalanced current value due to this change and issue an alarm.
（実施例） 本発明の一実施例を図面と共に説明する。第１図は本
発明に係る異常検出器付圧力開放器の一実施例の全体構
成を示す模式図、第２図は第１図関数発生器の配線図、
第３図は第１図実施例の圧力開放板の特性図、第４図は
第１図実施例の圧力開放板の構成図である。第１図にお
いて、１は圧力容器または蒸気配管などに設置されてい
るフランジ、２は圧力開放板でその構成は第４図に示さ
れるように従来の圧力開放板２′の中層部に例えばCu−
Ni合金のように延性のある電気抵抗線から成る抵抗体８
を組み込んだ新規のものである。抵抗体８と直列に、関
数発生器３、警報設定器４、警報器５が順に電気的に接
続されている。また抵抗体８は第２図に示すように抵抗
R1、R2、R3、R4からなるブリッジ回路を構成しており、
圧力容器または蒸気配管は、矢印Ｐの内圧を受けて圧力
開放板２はＰの方向に変位すると圧力開放板２の層間に
配設されている抵抗体８の抵抗R1、R2の電気抵抗値が増
加し、したがって抵抗R1、R2の変化によるブリッジ回路
の不平衡電流は大きくなる。さらに、このときの圧力容
器の内部圧力すなわち、圧力開放板２の内側に負荷され
る圧力は、圧力伝送器６の容器内圧力信号と圧力開放器
２からの不平衡電流信号が関数発生器３に伝送され、正
常時の圧力−不平衡電流の関係特性を事前に調査記憶し
ておくことにより、第３図に示す関数発生器３の点Ｑを
超えないように操作が可能となる。すなわち、ブリッジ
回路からの不平衡電流から劣化検出信号を演算し、前記
劣化検出信号と劣化警報設定信号を関数発生器３によっ
て演算比較することによって、関数発生器３の出力に応
じた警報を発することができる。なお、圧力容器の圧力
が低下すると、圧力開放板２は元の状態に復帰し、した
がって抵抗体８の抵抗R1、R2の抵抗値も原状復帰する。
これにより、圧力容器等は通常使用が可能な状態とな
る。抵抗体８は弾性限界内で使用することは勿論であ
る。Example An example of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing an entire configuration of an embodiment of a pressure relief device with an abnormality detector according to the present invention, FIG. 2 is a wiring diagram of a function generator in FIG.
FIG. 3 is a characteristic diagram of the pressure release plate of the embodiment of FIG. 1, and FIG. 4 is a configuration diagram of the pressure release plate of the embodiment of FIG. In FIG. 1, reference numeral 1 denotes a flange installed in a pressure vessel or a steam pipe, etc., 2 denotes a pressure release plate, the structure of which is, for example, Cu in the middle part of a conventional pressure release plate 2 'as shown in FIG. −
Resistor 8 consisting of ductile electric resistance wire like Ni alloy
It is a new one incorporating. A function generator 3, an alarm setter 4, and an alarm 5 are electrically connected in series with the resistor 8. The resistor 8 has a resistance as shown in FIG.
A bridge circuit consisting of R 1 , R 2 , R 3 , R 4 is configured,
When the pressure vessel or the steam pipe receives the internal pressure of arrow P and the pressure release plate 2 is displaced in the direction of P, the electric resistance of the resistors R 1 and R 2 of the resistor 8 disposed between the layers of the pressure release plate 2. The value increases, and thus the unbalance current of the bridge circuit due to the change in the resistances R 1 and R 2 increases. Further, at this time, the internal pressure of the pressure vessel, that is, the pressure applied to the inside of the pressure release plate 2, is determined by the pressure signal in the vessel of the pressure transmitter 6 and the unbalanced current signal from the pressure release device 2. By preliminarily examining and storing the pressure-unbalanced current relationship characteristic in the normal state, the operation can be performed so as not to exceed the point Q of the function generator 3 shown in FIG. That is, a deterioration detection signal is calculated from the unbalanced current from the bridge circuit, and the deterioration detection signal and the deterioration alarm setting signal are calculated and compared by the function generator 3, thereby generating an alarm corresponding to the output of the function generator 3. be able to. When the pressure in the pressure vessel decreases, the pressure release plate 2 returns to the original state, and accordingly, the resistance values of the resistors R 1 and R 2 of the resistor 8 return to the original state.
Thereby, the pressure vessel and the like are in a state where they can be used normally. Needless to say, the resistor 8 is used within the elastic limit.
圧力容器の内部圧力Ｐが増加するにつれて圧力開放板
２は、矢印Ｐ方向へ変位し圧力開放板２の層間に組み込
まれている延性を有する抵抗体８は、抵抗R1、R2の抵抗
値が増加するが、安定状態すなわち、正常時は初期調整
時と同じく不平衡電流が流れるので異常とは判断されな
い。しかし、圧力開放板２が経年変化により劣化し、同
じ圧力での比較で、初期調整時より大きく変位した場合
は、ブリッジ回路の不平衡電流は大きくなり、第３図の
破線で示すように、圧力開放板２の劣化による異常との
判断し警報発信により低圧時開放の危険を警告すること
ができる。また圧力容器の異常昇圧により、圧力開放板
２が開放されたときは、ブリッジ回路の不平衡電流は大
きくなり、警報設定器４から開放警報器５へ信号が伝達
され、運転員に対して圧力開放板２が開放したことを告
知することができる。特に化に対する警報の場合、圧力
容器の内部圧力Ｐは正常であっても、圧力開放板２の経
年的劣化、または内部圧力Ｐの上昇と下降の繰返しによ
る耐力低下のための低圧力開放であることを事前に検知
し、下記の対応策によりプラントの安定操業が可能とな
るものである。As the internal pressure P of the pressure vessel increases, the pressure release plate 2 is displaced in the direction of arrow P, and the ductile resistor 8 incorporated between the layers of the pressure release plate 2 has resistance values of the resistances R 1 and R 2 . However, since an unbalanced current flows in a stable state, that is, in a normal state as in the initial adjustment, it is not determined that the current is abnormal. However, if the pressure release plate 2 deteriorates due to aging and is displaced more than the time of the initial adjustment in comparison with the same pressure, the unbalanced current of the bridge circuit becomes large, and as shown by the broken line in FIG. It can be judged that there is an abnormality due to the deterioration of the pressure release plate 2 and an alarm is issued to warn the danger of release at low pressure. When the pressure release plate 2 is opened due to abnormal pressure rise of the pressure vessel, the unbalanced current of the bridge circuit increases, a signal is transmitted from the alarm setting device 4 to the release alarm device 5, and the pressure is given to the operator. It can be notified that the release plate 2 has opened. In particular, in the case of an alarm for activation, even if the internal pressure P of the pressure vessel is normal, the pressure release plate 2 is degraded over time or a low pressure is released due to a decrease in proof stress due to repeated rise and fall of the internal pressure P. This will be detected in advance and the following measures will enable stable operation of the plant.
低圧力開放することを事前に検知された場合： （ａ）例えばミル配管の場合、ミル圧力を下げ初期開放
圧力時の変位量以内に制限してミルを運転する。When low pressure release is detected in advance: (a) For example, in the case of a mill pipe, the mill is operated with the mill pressure reduced to limit the displacement within the initial release pressure.
（ｂ）バイパス系統を有する場合は、バイパス比を変え
初期開放圧力時の変位量以内に制限する等の応急措置を
行ない、一時的に低圧開放することを回避し、負荷の低
いときに新しい圧力開放板と交換する等の処置を実施す
ることにより、プラントの安定操業を可能とする。(B) If a bypass system is provided, take emergency measures such as changing the bypass ratio to limit the displacement within the initial opening pressure to avoid temporarily releasing the low pressure, and use a new pressure when the load is low. By performing measures such as replacing with an open plate, stable operation of the plant is enabled.
本実施例においては、圧力開放板２の層間に抵抗体８
を組み込んでいるが、圧力開放板２の上側に抵抗体８が
接するように配置したものでも同様の効果が得られる。
また、実施例では抵抗体８の抵抗R1、R2の２本の抵抗値
を利用しているが、少なくとも１本の抵抗の抵抗値を利
用すればよく、４本の抵抗の抵抗値すべてを利用するこ
とも勿論可能である。さらに、内部流体若しくは気温の
変化により、抵抗体８の抵抗値が変化しても、温度セン
サを圧力開放板２の抵抗の近傍に配設して適宜の補正を
実施することにより、またブリッジ回路の抵抗R3、R4と
直列に温度補正用の抵抗を別に配設することにより圧力
制御値の補正が可能である。なお、上記実施例はブリッ
ジ回路について説明したが、容器内圧力を電気信号に変
換可能な他の圧力センサの利用が可能なことはいうまで
もない。In this embodiment, the resistor 8 is disposed between the layers of the pressure release plate 2.
However, the same effect can be obtained even if the resistor 8 is arranged so as to be in contact with the upper side of the pressure release plate 2.
Further, in the embodiment, the two resistance values of the resistors R 1 and R 2 of the resistor 8 are used. However, it is sufficient to use the resistance value of at least one resistor. Of course, it is also possible to use. Further, even if the resistance value of the resistor 8 changes due to a change in the internal fluid or the temperature, the temperature sensor is disposed in the vicinity of the resistance of the pressure release plate 2 and an appropriate correction is performed. The pressure control value can be corrected by separately providing a temperature correcting resistor in series with the resistors R 3 and R 4 . In the above embodiment, the bridge circuit has been described, but it goes without saying that another pressure sensor capable of converting the pressure in the container into an electric signal can be used.
（発明の効果） 本発明の実施により、圧力開放板の低圧破裂を事前に
検出し、また低圧開放時の警報を発することができるの
で、低圧開放に対する事前の対応措置を実施することが
でき圧力容器ほか配管系統はもとより、プラントの操業
安定化への効果は大なるものがある。(Effect of the Invention) By implementing the present invention, a low-pressure rupture of the pressure release plate can be detected in advance, and an alarm at the time of low-pressure release can be issued. In addition to containers and other piping systems, the effect on the stabilization of plant operation is significant.
第１図は本発明に係る異常検出器付圧力開放器の一実施
例の全体構成を示す模式図、第２図は第１図関数発生器
の配線図、第３図は第１図実施例の開放板の特性図、第
４図は第１図実施例の開放板の構成図、第５図（ａ）、
（ｂ）は従来の開放板の構成図である。 １……フランジ、２……圧力開放板 ３……関数発生器、４……警報設定器 ５……警報器、６……圧力伝送器 ７……ガスケット、８……抵抗体 ９……容器内圧力信号路、10……不平衡電流信号路FIG. 1 is a schematic diagram showing an entire configuration of one embodiment of a pressure relief device with an abnormality detector according to the present invention, FIG. 2 is a wiring diagram of a function generator in FIG. 1, and FIG. 3 is an embodiment in FIG. FIG. 4 is a characteristic diagram of the open plate, FIG. 4 is a configuration diagram of the open plate of FIG. 1 embodiment, FIG.
(B) is a configuration diagram of a conventional open plate. DESCRIPTION OF SYMBOLS 1 ... Flange 2 ... Pressure release plate 3 ... Function generator 4 ... Alarm setting device 5 ... Alarm device 6 ... Pressure transmitter 7 ... Gasket, 8 ... Resistor 9 ... Container Internal pressure signal path, 10 ... Unbalanced current signal path
Claims (3)
部圧力に動作する圧力開放器において、フランジの間に
重層して固定された圧力開放板と、前記圧力開放板の前
記層間に配設した圧力センサとを備えていることを特徴
とする圧力開放器。1. A pressure release device which operates at an abnormal internal pressure of a vessel or a pipe receiving an internal pressure, wherein said pressure release plate is fixedly layered between flanges, and is disposed between said layers of said pressure release plate. A pressure relief device comprising: a pressure sensor.
る抵抗体であることを特徴とする特許請求の範囲第１項
記載の圧力開放器。2. The pressure relief device according to claim 1, wherein said pressure sensor is a resistor constituting a bridge circuit.
開放器と、前記圧力容器の内部圧力を検出する圧力伝送
器と、前記圧力開放器からの入力信号と前記圧力伝送路
からの入力信号を比較演算する関数発生器と、前記関数
発生器の出力に応じて警報を発することを特徴とする圧
力開放器の制御装置。3. A pressure relief device according to claim 1 or 2, a pressure transmitter for detecting an internal pressure of the pressure vessel, an input signal from the pressure relief device and a pressure transmission line. A function generator for comparing and calculating the input signals of the above, and an alarm is issued according to the output of the function generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4858489A JP2746988B2 (en) | 1989-03-02 | 1989-03-02 | Pressure relief device and its control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4858489A JP2746988B2 (en) | 1989-03-02 | 1989-03-02 | Pressure relief device and its control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02229972A JPH02229972A (en) | 1990-09-12 |
| JP2746988B2 true JP2746988B2 (en) | 1998-05-06 |
Family
ID=12807452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4858489A Expired - Lifetime JP2746988B2 (en) | 1989-03-02 | 1989-03-02 | Pressure relief device and its control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2746988B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2447943B (en) * | 2007-03-29 | 2010-11-10 | Siemens Magnet Technology Ltd | A burst disc arrangement and a method for replacing a burst disc in a burst disc arrangement |
| US9956831B2 (en) * | 2014-12-15 | 2018-05-01 | Goodrich Corporation | Combination tire pressure sensor and over-inflation pressure relief valve |
| US9649894B2 (en) | 2015-07-01 | 2017-05-16 | Goodrich Corporation | Tire pressure sensor assemblies including a tire pressure sensor for mating with an over-inflation pressure relief valve in an aircraft wheel system |
| CN109801721B (en) * | 2019-01-09 | 2024-05-10 | 中国原子能科学研究院 | Rupture disk protection device with alarm function |
-
1989
- 1989-03-02 JP JP4858489A patent/JP2746988B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02229972A (en) | 1990-09-12 |
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