JP2022139961A - Device and method for measuring position of liquid surface - Google Patents

Device and method for measuring position of liquid surface Download PDF

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JP2022139961A
JP2022139961A JP2021040566A JP2021040566A JP2022139961A JP 2022139961 A JP2022139961 A JP 2022139961A JP 2021040566 A JP2021040566 A JP 2021040566A JP 2021040566 A JP2021040566 A JP 2021040566A JP 2022139961 A JP2022139961 A JP 2022139961A
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liquid
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breakwater
liquid level
temperature
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和幸 前田
Kazuyuki Maeda
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Abstract

To provide a device and a method for measuring the position of a liquid surface.SOLUTION: The device and the method measure the position of a liquid surface by: winding a cylindrical material spirally on the outside of a wave protection tube to precisely and stably measure the surface of the liquid in a container; setting a structure that surrounds the spirally wound cylindrical material and closing both edges; making a vacuum space formed of a wave protection tube and the structure surrounding the cylindrical material spirally wound around the wave protection tube; and flowing a fluid of a lower temperature than the heat-resistance temperature of a sensor unit of a liquid surface meter in the spiral material.SELECTED DRAWING: Figure 4

Description

本発明は、容器内に貯蔵された液体の液面位置を計測する装置と方法に関する。 The present invention relates to an apparatus and method for measuring the level of liquid stored in a container.

容器内に貯蔵された液体の状態を知るために、液面計（レベルゲージ）が用いられている。液面計は、容器内に貯蔵された液体の液面位置を何らかの方法で数値化することにより、液体の（絶対）量（容積又は、及び質量）や最大貯蔵容積に対する割合（％）を目視又は、及び計算により求めることができる。容器内の液面位置を計測するための計測装置には、容器内の液体と接触し可動部を有するフロート式、容器内の液と接触し可動部を有しない電極式、静電容量式、差圧式、ガイドパルス式、光式、振動式などの液面計が用いられている。また、容器内の液と接触せず、可動部を有しない超音波式、電波式、レーザー式などの液面計が用いられているが、いずれの方式においても、対象となる液面を安定させることにより計測精度が向上する。
例えば、特許文献１には「ボイラに給水するポンプの動作をレベルセンサーで制御して、高水位と低水位に設置すると共に、該レベルセンサーで設定された高水位と低水位の範囲内において、比例制御レベルセンサーからの比例信号によりボイラ水位制御弁を制御して、ボイラ内の水位を一定の低いレベルに保持する技術」が記載されている。
特許文献２には「タンク内の液体が、液面計の接続部に用いられる金属材料を腐食させるという不具合や、液面計の内部で結晶化して固まるという不具合を未然に防止するために、空気槽を有するタンク液面検知装置を用いて、タンク内の液体とは異なる液体を用いてタンク内の液面を表示する技術」が記載されている。
特許文献３には「高水位と低水位を検知する検知管からなる液面レベルセンサーにおいて、検知管の取り付け部分から底部までを覆うガイド管を設け、ガイド管の下部と上部に槽内物質が通過する穴を設け、かつ下部の穴をガイド管の最下部に位置させることにより、槽内に発生する泡が入り込まないようにする技術」が記載されている。 A liquid level gauge (level gauge) is used to know the state of the liquid stored in the container. A liquid level gauge visually indicates the (absolute) amount (volume or mass) of the liquid and the ratio (%) to the maximum storage volume by quantifying the liquid level position of the liquid stored in the container in some way. Or, and can be obtained by calculation. Measuring devices for measuring the liquid level in a container include a float type that contacts the liquid in the container and has a moving part, an electrode type that contacts the liquid in the container and has no moving part, a capacitance type, Liquid level gauges such as differential pressure type, guide pulse type, optical type and vibration type are used. Ultrasonic, radio wave, and laser liquid level gauges that do not come into contact with the liquid in the container and have no moving parts are used. The measurement accuracy is improved by
For example, in Patent Document 1, "The operation of a pump that feeds water to a boiler is controlled by a level sensor and installed at a high water level and a low water level, and within the range of the high water level and the low water level set by the level sensor, A technology for controlling a boiler water level control valve with a proportional signal from a proportional control level sensor to keep the water level in the boiler at a constant low level.
In Patent Document 2, "In order to prevent the problem that the liquid in the tank corrodes the metal material used for the connection part of the level gauge and the problem that it crystallizes and solidifies inside the level gauge, A technology for displaying the liquid level in a tank using a liquid different from the liquid in the tank using a tank liquid level detection device having an air tank.
Patent Document 3 states, "In a liquid level sensor consisting of a detection tube that detects a high water level and a low water level, a guide tube is provided that covers from the installation part of the detection tube to the bottom, and the substances in the tank are located at the bottom and top of the guide tube. A technique for preventing bubbles generated in the tank from entering by providing a hole through which the guide pipe passes and positioning the lower hole at the bottom of the guide pipe.

特開平８－２４７２０４号公報JP-A-8-247204 特開２０１９－１０５６１８号公報JP 2019-105618 A 特開平４－１２８６１８号公報JP-A-4-128618

特許文献１に記載された方法を用いる場合、２重の検知装置を用いることにより安定した計測・制御が可能となるが、特許文献２に記載されているように、「タンク内の液体が、液面計の接続部に用いられる金属材料を腐食させるという不具合や、液面計の内部で結晶化して固まるという不具合」が発生する可能性がある。
特許文献２に記載された方法を用いる場合、「タンク内の液体が、液面計の接続部に用いられる金属材料を腐食させるという不具合」は解消されるものの、装置が複雑になるとともに、タンク内の液体とタンク液面検知装置との接合部に同様の不具合が発生する可能性がある。
特許文献３に記載された方法を用いる場合、水位を検知するセンサー部分が直接液体に接するため、例えば200℃以上の高温液体の液面を計測する場合、センサー部分の耐熱温度がそれ以上になるような構造と機能を持たせる必要がある。 When using the method described in Patent Document 1, stable measurement and control are possible by using a double detection device, but as described in Patent Document 2, "the liquid in the tank There is a possibility that problems such as corroding the metal material used for the connection part of the level gauge or crystallizing and solidifying inside the level gauge may occur.
When the method described in Patent Document 2 is used, although "the problem that the liquid in the tank corrodes the metal material used for the connection part of the liquid level gauge" is solved, the device becomes complicated and the tank A similar problem may occur at the joint between the liquid inside the tank and the tank liquid level detection device.
When using the method described in Patent Document 3, the sensor part that detects the water level is in direct contact with the liquid, so for example, when measuring the liquid level of a high temperature liquid of 200 ° C or higher, the heat resistance temperature of the sensor part becomes higher than that. It is necessary to have such a structure and function.

そこで本発明は、
（１）タンク内の液体が、液面計の接続部に用いられる金属材料を腐食させるという不具合や、液面計の内部で結晶化して固まるという不具合を未然に防止するために、液面計のセンサー部分を直接液体に挿入して計測する。
（２）液体の波立ちや泡がある場合にも対応できるように、液面計のセンサー部分の周囲に防波管を設置する。
（３）防波管が槽内に発生する波により湾曲などの変形を起こさないように、防波管の外側に防波管の周囲を取り囲む波形の構造物を設置する。
（４）計測する液体の温度が、液面計のセンサー部分の耐熱温度よりも高い場合を考慮して、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置するとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させる。
（５）さらに、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物の両端を閉じ、防波管と、防波管にらせん状に巻き付けた筒状の物質の周囲を取り囲む構造物とで構成される空間を真空にすることにより、断熱効果を向上させる。
ことにより、これまで困難とされてきた液体の液面を安定して精度良く計測することが可能にした。 Therefore, the present invention
(1) In order to prevent problems such as the liquid inside the tank corroding the metal material used for the connection part of the level gauge, or the problem of crystallizing and solidifying inside the level gauge, Measure by inserting the sensor part directly into the liquid.
(2) Install a wave-break pipe around the sensor part of the liquid level gauge so that it can cope with ripples and bubbles in the liquid.
(3) A corrugated structure surrounding the breakwater pipe is installed on the outside of the breakwater pipe so that the breakwater pipe will not be bent or otherwise deformed by the waves generated in the tank.
(4) In consideration of the case where the temperature of the liquid to be measured is higher than the heat resistance temperature of the sensor part of the liquid level gauge, a cylindrical material is spirally wound around the outside of the wave breaker. In addition to installing a structure surrounding the perimeter of the material in the form of a spiral, a fluid with a temperature lower than the heat-resistant temperature of the sensor part of the liquid level gauge is made to flow inside the material.
(5) Furthermore, closing both ends of the structure surrounding the cylindrical substance wound spirally, the wave breaker and the structure surrounding the cylindrical substance spirally wound around the wave breaker By evacuating the space composed of, the heat insulating effect is improved.
As a result, it has become possible to measure the liquid level stably and accurately, which has been difficult until now.

請求項１に記載の発明は、防波管の外側に防波管の周囲を取り囲む構造物が設置された、二重構造の防波管を有することを特徴とする。なお、防波管と防波管の外側に設置された防波管の周囲を取り囲む構造物との位置関係は、一部が接している場合と、全部が隔てられて、防波管と防波管の周囲を取り囲む構造物との間に空間を形成する場合がある。 The invention according to claim 1 is characterized by having a double-structure breakwater pipe in which a structure surrounding the circumference of the breakwater pipe is installed on the outside of the breakwater pipe. The positional relationship between the breakwater pipes and the structures surrounding the breakwater pipes installed outside the breakwater pipes is as follows. A space may be formed between the structure surrounding the wave tube.

請求項２に記載の発明は、防波管の外側に防波管の周囲を取り囲む構造物が設置された、二重構造の防波管を用いることを特徴とする。 The invention according to claim 2 is characterized by using a double-structure breakwater pipe in which a structure surrounding the circumference of the breakwater pipe is installed on the outside of the breakwater pipe.

請求項３に記載の発明は、防波管の強度を向上させるために、防波管の外側に防波管の周囲を取り囲む波形の構造物を有することを特徴とする。なお、波形の構造物は防波管の外側に設置される場合に加え、従来の防波管と同じ機能を持たせた構造物として単独で用いてもよい。 The invention according to claim 3 is characterized by having a corrugated structure surrounding the periphery of the breakwater pipe on the outside of the breakwater pipe in order to improve the strength of the breakwater pipe. In addition to the case where the corrugated structure is installed outside the breakwater pipe, it may be used alone as a structure having the same function as the conventional breakwater pipe.

請求項４に記載の発明は、防波管の強度を向上させるために、防波管の外側に防波管の周囲を取り囲む波形の構造物を設置するという方法を用いることを特徴とする。なお、波形の構造物は防波管の外側に設置するという方法に加え、従来の防波管と同じ機能を持たせた構造物として単独で用いるという方法を用いてもよい。 The invention according to claim 4 is characterized by using a method of installing a corrugated structure surrounding the perimeter of the breakwater pipe on the outside of the breakwater pipe in order to improve the strength of the breakwater pipe. In addition to the method of installing the corrugated structure on the outside of the breakwater pipe, a method of using it alone as a structure having the same function as the conventional breakwater pipe may be used.

請求項５に記載の発明は、防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置するとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させることを特徴とする。 In the invention according to claim 5, in order to lower the temperature of the liquid in the breaker (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wound around the outside of the breaker to reduce the temperature of the liquid. It is characterized by installing a structure surrounding a cylindrical substance wound in a shape and flowing a fluid with a temperature lower than the heat-resistant temperature of the sensor part of the liquid level gauge inside the spiral substance.

請求項６に記載の発明は、防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置するとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させるという方法を用いることを特徴とする。 In the invention according to claim 6, in order to lower the temperature of the liquid in the breaker (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wound around the outside of the breaker to reduce the temperature of the liquid. In addition to installing a structure that surrounds the circumference of a cylinder-shaped substance wound in a shape, it is recommended to use a method in which a fluid with a temperature lower than the heat-resistant temperature of the sensor part of the liquid level gauge is made to flow inside the spiral-shaped substance. Characterized by

請求項７に記載の発明は、防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置してその下部（液体中にある部分）を閉じ、防波管と、防波管にらせん状に巻き付けた筒状の物質の周囲を取り囲む構造物とで構成される空間を空気で満たすことにより空気の断熱層を形成するとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させることを特徴とする。 In the invention according to claim 7, in order to lower the temperature of the liquid in the breaker (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wound around the outside of the breaker to reduce the temperature of the liquid. A structure that surrounds the cylindrical material wrapped in a shape is installed and the lower part (the part in the liquid) is closed, and the wave breaker and the cylindrical material wound spirally around the breaker By filling the space composed of the structure surrounding the It is characterized by

請求項８に記載の発明は、防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置してその下部（液体中にある部分）を閉じ、防波管と、防波管にらせん状に巻き付けた筒状の物質の周囲を取り囲む構造物とで構成される空間を空気で満たすことにより空気の断熱層を形成するとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させるという方法を用いることを特徴とする。 According to the eighth aspect of the invention, in order to lower the temperature of the liquid in the breakwater (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wound around the outside of the breakwater. A structure that surrounds the cylindrical material wrapped in a shape is installed and the lower part (the part in the liquid) is closed, and the wave breaker and the cylindrical material wound spirally around the breaker By filling the space composed of the structure surrounding the It is characterized by using the method of

請求項９に記載の発明は、防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置してその両端を閉じ、防波管と、防波管にらせん状に巻き付けた筒状の物質の周囲を取り囲む構造物とで構成される空間を真空にするとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させることを特徴とする。 According to the ninth aspect of the invention, in order to lower the temperature of the liquid in the breakwater pipe (the liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wound around the outside of the breakwater pipe, and the spiral A structure is installed to surround the cylindrical material wrapped in a spiral shape and closed at both ends, and consists of a breakwater pipe and a structure surrounding the cylindrical material spirally wrapped around the breakwater pipe. The space to be filled is evacuated, and a fluid having a temperature lower than the heat-resistant temperature of the sensor part of the liquid level gauge is caused to flow inside the spiral substance.

請求項１０に記載の発明は、防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置してその両端を閉じ、防波管と、防波管にらせん状に巻き付けた筒状の物質の周囲を取り囲む構造物とで構成される空間を真空にするとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させるという方法を用いることを特徴とする。 According to the tenth aspect of the invention, in order to lower the temperature of the liquid in the breakwater pipe (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wound around the outside of the breakwater pipe. A structure is installed to surround the cylindrical material wrapped in a spiral shape and closed at both ends, and consists of a breakwater pipe and a structure surrounding the cylindrical material spirally wrapped around the breakwater pipe. It is characterized by using a method of evacuating the space to be filled and flowing a fluid with a temperature lower than the heat-resistant temperature of the sensor part of the liquid level gauge inside the spiral substance.

本発明を用いることにより、容器に貯蔵された液体の液面を安定して精度良く計測することが可能となる。 By using the present invention, it is possible to stably and accurately measure the liquid level of the liquid stored in the container.

通常用いられている液面計の問題点（解決すべき課題）を示したものである。It shows the problem (problem to be solved) of the liquid level gauge that is normally used. 防波管の効果を示したものである。This shows the effect of the breakwater pipe. 本発明の実施の形態に係る基本構成を示したものである。1 shows a basic configuration according to an embodiment of the present invention; 本発明の実施の形態に係る応用構成の実施例を示したものである。1 shows an example of an application configuration according to an embodiment of the present invention.

図１は、通常用いられている液面計の問題点（解決すべき課題）を示したものである。液面計は、図１に示すようにセンサー式液面計１と直視式液面計２に大別される。
センサー式液面計は、容器内の液と接触し可動部を有しない電極式、静電容量式、差圧式、ガイドパルス式、光式、振動式などの液面計が用いられている。また、容器内の液と接触せず、可動部を有しない超音波式、電波式、レーザー式などの液面計が用いられているが、液面が波立っている場合や、図１に示すように、液面泡がある場合には正確な計測ができない可能性がある。
直視式液面計は通常の貯蔵設備において広く用いられているが、特許文献２に記載されているように「タンク内の液体が、液面計の接続部に用いられる金属材料を腐食させるという不具合や、液面計の内部で結晶化して固まるという不具合」が生じる可能性がある。また、図１に示すように、かくはん装置３を用いてかくはんを行った場合、液面の位置が変化するため、正確な計測ができない可能性がある。 FIG. 1 shows a problem (problem to be solved) of a commonly used liquid level gauge. As shown in FIG. 1, the liquid level gauge is roughly classified into a sensor type liquid level gauge 1 and a direct view type liquid level gauge 2 .
As the sensor-type level gauge, an electrode-type, capacitance-type, differential-pressure-type, guide-pulse-type, optical-type, vibration-type, etc. liquid level gauge that contacts the liquid in the container and has no moving parts is used. Ultrasonic, radio wave, and laser liquid level gauges, which do not come into contact with the liquid in the container and do not have moving parts, are used. As shown, the presence of surface foam may prevent accurate measurements.
Direct-view type liquid level gauges are widely used in ordinary storage facilities, but as described in Patent Document 2, "the liquid in the tank corrodes the metal material used for the connection part of the liquid level gauge. There is a possibility that problems such as problems such as crystallizing and solidifying inside the level gauge may occur. Further, as shown in FIG. 1, when stirring is performed using the stirring device 3, there is a possibility that accurate measurement cannot be performed because the position of the liquid surface changes.

図２は、防波管の効果を示したものである。
防波管を用いることにより、液面が波立っている場合や、図１に示すように、液面泡がある場合にもより正確な計測が可能となる。液面の移動距離が長いとセンサー部分の長さも長くなる。この際、図に示すようにかくはんによる波立ちや旋回力が防波管に作用して防波管が湾曲すると、防波管の下部と液面計センサーの底部が接触して計測精度に影響を与えるだけでなく、損傷に至る可能性もある。これを防止する方法の一つとして、防波管の外周部に波形の物質を設置することにより、防波管の曲げに対する強度を高めることができる。また、図２に示すように、防波管はその底部が液体に対して開かれているが、その上部の液面より高い位置に穴を設けることにより、液面の変化に追従するとともに、防波管の液面から最下部までの間に複数の穴を設けることにより、防波管内の液体が防波管の外の液体と入れ替わることにより、滞留による変質や劣化を防止することができる。 FIG. 2 shows the effect of the break pipe.
By using a wave breaker, it is possible to perform more accurate measurement even when the liquid surface is rippling or, as shown in FIG. 1, when there are bubbles on the liquid surface. If the moving distance of the liquid surface is long, the length of the sensor part is also long. At this time, as shown in the figure, if the breaker pipe bends due to the ripples and turning force caused by stirring, the lower part of the breaker pipe and the bottom of the liquid level gauge sensor come into contact with each other, affecting the measurement accuracy. Not only can it hurt, but it can also cause damage. As one of the methods to prevent this, it is possible to increase the bending strength of the breaker pipe by placing a corrugated material on the outer periphery of the breaker pipe. Also, as shown in FIG. 2, the bottom of the breakwater pipe is open to the liquid, but by providing a hole in the upper portion at a position higher than the liquid surface, it follows changes in the liquid surface and By providing a plurality of holes between the liquid surface and the lowest part of the breakwater pipe, the liquid inside the breakwater pipe is replaced with the liquid outside the breakwater pipe, thereby preventing alteration and deterioration due to retention. .

図３は、本発明の実施の形態に係る基本構成を示したものである。
図に示すように、防波管を２重構造として内部を冷却することにより、防波管の外側の液体の温度が、液面計のセンサー部分の許容温度以上であっても、防波管内部の温度を液面計のセンサー部分の許容温度以下に保つことが可能となる。具体的には、防波管の外周に筒状の物質をらせん状に設置し、筒状の物質の内部に、液面計のセンサー部分の許容温度以下の流体を連続的に流動させることにより、防波管内部の液体の温度を低下させることができる。この際、防波管及び防波管に設置する物質は、できるだけ熱伝導率が大きい物質を用いるとともに、防波管に設置した筒状の物質を覆う物質は、できるだけ熱伝導率が小さい物質を用いることにより、容器内にある高温の液体と防波管内ある液体との効果的な断熱と、筒状の物質内部を流動する流体による効果的な冷却が可能となる。
なお、防波管に設置する筒状の物質の設置方法としては、図に示すようにらせん状に巻き付けるとともに、最下部で折り返して再びらせん状に巻き付けることにより管の途中に継ぎ目がない状態となり、信頼性と耐久性を高めることができる。 FIG. 3 shows a basic configuration according to an embodiment of the invention.
As shown in the figure, by cooling the inside of the breakwater pipe with a double structure, even if the temperature of the liquid outside the breakwater pipe exceeds the allowable temperature of the sensor part of the liquid level gauge, the breakwater pipe It is possible to keep the internal temperature below the allowable temperature of the sensor part of the liquid level gauge. Specifically, a cylindrical material is placed spirally around the outer circumference of the breakwater pipe, and a fluid whose temperature is lower than the allowable temperature of the sensor part of the liquid level gauge is allowed to flow continuously inside the cylindrical material. , the temperature of the liquid inside the breakwater can be reduced. In this case, for the breaker pipes and the materials installed in the breaker pipes, materials with the highest possible thermal conductivity should be used, and for the material that covers the tubular material installed on the breaker pipes, a substance with the lowest possible thermal conductivity should be used. By using it, it becomes possible to effectively insulate the high-temperature liquid in the container from the liquid in the breaker tube, and to effectively cool the fluid flowing inside the cylindrical material.
As for the installation method of the cylindrical material to be installed in the breakwater pipe, as shown in the figure, it is wound in a spiral shape, folded back at the bottom and wound again in a spiral shape, so that there is no seam in the middle of the pipe. , can increase reliability and durability.

図４は、本発明の実施の形態に係る応用構成の実施例を示したものである。
図に示すように、らせん状に巻き付けた物質の周囲を取り囲む構造物を設置してその両端を閉じ、防波管と、防波管にらせん状に巻き付けた物質の周囲を取り囲む構造物とで構成される空間を真空にすることにより、容器内にある高温の液体から防波管内にある液体への熱の移動を最小限にすることができる。これにより、防波管の外部に設置した筒状の物質を流動する流体の量を低減できるとともに、筒状の物質の相互間隔を広くとるなど、防波管の外部に設置する物質の容積、重量、材料費なその低コスト化が可能となる。 FIG. 4 shows an example of an application configuration according to an embodiment of the present invention.
As shown in the figure, a structure surrounding the spirally wound material is installed and both ends are closed. By evacuating the defined space, heat transfer from the hot liquid in the vessel to the liquid in the breakwater can be minimized. As a result, it is possible to reduce the amount of fluid that flows through the tubular material installed outside the breakwater pipe, and to increase the space between the tubular objects. It is possible to reduce the weight and material cost.

本発明は、容器に貯蔵された液体の液面を安定して精度良く計測したい場合に適用可能である。 INDUSTRIAL APPLICABILITY The present invention is applicable when stably and accurately measuring the liquid level of a liquid stored in a container.

1. センサー式液面計
2. 直視式液面計
3. かくはん装置
4. 防波管
5. ２重構造の防波管
6. 筒状の物質
7. 真空の密閉空間

















1. Sensor-type liquid level gauge
2. Direct-view liquid level gauge
3. Stirrer
4. Breakwater pipe
5. Double structure wave break pipe
6. Cylindrical substance
7. Vacuum closed space

Claims (10)

防波管の外側に防波管の周囲を取り囲む構造物が設置された、二重構造の防波管を有することを特徴とする、液面の位置を計測する装置。 A device for measuring the position of a liquid surface, characterized by having a double-structure breakwater pipe in which a structure surrounding the circumference of the breakwater pipe is installed on the outside of the breakwater pipe. 防波管の外側に防波管の周囲を取り囲む構造物が設置された、二重構造の防波管を用いることを特徴とする、液面の位置を計測する方法。 A method for measuring the position of a liquid surface, characterized by using a double-structure breakwater pipe in which a structure surrounding the circumference of the breakwater pipe is installed on the outside of the breakwater pipe. 防波管の強度を向上させるために、防波管の外側に防波管の周囲を取り囲む波形の構造物を有することを特徴とする、請求項１に記載された液面の位置を計測する装置。 In order to improve the strength of the breakwater pipe, a corrugated structure surrounding the breakwater pipe is provided on the outside of the breakwater pipe. Device. 防波管の強度を向上させるために、防波管の外側に防波管の周囲を取り囲む波形の構造物を設置するという方法を用いることを特徴とする、請求項２に記載された液面の位置を計測する方法。 In order to improve the strength of the breakwater pipe, a method of installing a corrugated structure surrounding the circumference of the breakwater pipe is used on the outside of the breakwater pipe. How to measure the position of 防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置するとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させることを特徴とする、請求項１に記載された液面の位置を計測する装置。 In order to reduce the temperature of the liquid inside the breakwater pipe (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wrapped around the outside of the breakwater pipe, and the spirally wound cylindrical substance is The liquid level according to claim 1, characterized in that a structure surrounding the periphery is installed, and a fluid having a temperature lower than the heat-resistant temperature of the sensor part of the liquid level gauge is caused to flow inside the spiral substance. A device that measures the position of 防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置するとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させるという方法を用いることを特徴とする、請求項２に記載された液面の位置を計測する方法。 In order to reduce the temperature of the liquid inside the breakwater pipe (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wrapped around the outside of the breakwater pipe, and the spirally wound cylindrical substance is The method according to claim 2, wherein a structure surrounding the periphery is installed and a fluid having a temperature lower than the heat-resistant temperature of the sensor part of the liquid level gauge is caused to flow inside the spiral substance. A method of measuring the position of the liquid level that has been applied. 防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置してその下部（液体中にある部分）を閉じ、防波管と、防波管にらせん状に巻き付けた筒状の物質の周囲を取り囲む構造物とで構成される空間を空気で満たすことにより空気の断熱層を形成するとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させることを特徴とする、請求項１に記載された液面の位置を計測する装置。 In order to reduce the temperature of the liquid inside the breakwater pipe (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wrapped around the outside of the breakwater pipe, and the spirally wound cylindrical substance is A surrounding structure is installed to close the lower part (the part in the liquid), and consists of a break pipe and a cylindrical material spirally wrapped around the break pipe. Claim 1, characterized in that an air insulation layer is formed by filling the space with air, and a fluid having a temperature lower than the heat-resistant temperature of the sensor part of the liquid level gauge is caused to flow inside the spiral material. A device for measuring the position of the liquid surface described in . 防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置してその下部（液体中にある部分）を閉じ、防波管と、防波管にらせん状に巻き付けた筒状の物質の周囲を取り囲む構造物とで構成される空間を空気で満たすことにより空気の断熱層を形成するとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させるという方法を用いることを特徴とする、請求項２に記載された液面の位置を計測する方法。 In order to reduce the temperature of the liquid inside the breakwater pipe (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wrapped around the outside of the breakwater pipe, and the spirally wound cylindrical substance is A surrounding structure is installed to close the lower part (the part in the liquid), and consists of a break pipe and a cylindrical material spirally wrapped around the break pipe. It is characterized by using a method of filling the space with air to form an air insulation layer and flowing a fluid with a temperature lower than the heat-resistant temperature of the sensor part of the liquid level gauge inside the spiral material. 3. A method for measuring the position of a liquid level according to claim 2. 防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置してその両端を閉じ、防波管と、防波管にらせん状に巻き付けた筒状の物質の周囲を取り囲む構造物とで構成される空間を真空にするとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させることを特徴とする、請求項１に記載された液面の位置を計測する装置。 In order to reduce the temperature of the liquid inside the breakwater pipe (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wrapped around the outside of the breakwater pipe, and the spirally wound cylindrical substance is A structure surrounding the perimeter is installed and closed at both ends, and the space composed of the breakwater pipe and the structure surrounding the tubular material spirally wound around the breakwater pipe is evacuated, 2. A device for measuring the position of a liquid level according to claim 1, wherein a fluid having a temperature lower than the heat resistance temperature of a sensor portion of the liquid level gauge is caused to flow inside the helical substance. 防波管内の液体（液面計のセンサー部に接する液体）の温度を低下させるために、防波管の外側に筒状の物質をらせん状に巻き付け、らせん状に巻き付けた筒状の物質の周囲を取り囲む構造物を設置してその両端を閉じ、防波管と、防波管にらせん状に巻き付けた筒状の物質の周囲を取り囲む構造物とで構成される空間を真空にするとともに、らせん状の物質の内部に、液面計のセンサー部の耐熱温度よりも低温の流体を流動させるという方法を用いることを特徴とする、請求項２に記載された液面の位置を計測する方法。





























In order to reduce the temperature of the liquid inside the breakwater pipe (liquid in contact with the sensor part of the liquid level gauge), a cylindrical substance is spirally wrapped around the outside of the breakwater pipe, and the spirally wound cylindrical substance is A structure surrounding the perimeter is installed and closed at both ends, and the space composed of the breakwater pipe and the structure surrounding the tubular material spirally wound around the breakwater pipe is evacuated, A method for measuring the position of a liquid level according to claim 2, characterized by using a method of flowing a fluid having a temperature lower than the heat-resistant temperature of the sensor part of the liquid level gauge inside the spiral substance. .
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