JP7815166B2 - Heat thermostatic water level gauge - Google Patents
Heat thermostatic water level gaugeInfo
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- JP7815166B2 JP7815166B2 JP2023041846A JP2023041846A JP7815166B2 JP 7815166 B2 JP7815166 B2 JP 7815166B2 JP 2023041846 A JP2023041846 A JP 2023041846A JP 2023041846 A JP2023041846 A JP 2023041846A JP 7815166 B2 JP7815166 B2 JP 7815166B2
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Description
本発明の実施形態は、温度計も兼ねるヒ－トサ－モ式水位計に関する。 An embodiment of the present invention relates to a heat-thermo water level gauge that also functions as a thermometer.
原子力プラントの燃料プールに設置される水位計としてヒ－トサ－モ式水位計が適用されている。このヒ－トサ－モ式水位計は、温度計とヒ－タを持ち、気中と水中の熱伝達性の違いを利用し、ヒータをＯＮにした時の温度計の温度上昇の違いから、気中と水中を判別する。このため、ヒ－タをＯＮにした場合、温度計の温度信号は、燃料プールの水温を正確に反映していない。 Heat-thermo water level gauges are used as water level gauges installed in the fuel pools of nuclear power plants. These heat-thermo water level gauges have a thermometer and heater, and utilize the difference in heat transfer between air and water to distinguish between air and water from the difference in temperature rise of the thermometer when the heater is turned on. For this reason, when the heater is turned on, the temperature signal from the thermometer does not accurately reflect the water temperature in the fuel pool.
このように、従来のヒ－トサ－モ式水位計では、ヒータをＯＮにするとその近傍の水温が上昇するため、水位と水温を同時計測できない。そこで、水位と水温を同時計測するために、ヒ－トサ－モ式水位計とは別に温度計を設置する必要がある。しかし、水温計測の信頼性を確保するためには、別個に設置する温度計を離してヒータ発熱の影響を排除する必要があり、機器が大きくなる課題がある。 As such, with conventional heat-thermo water level gauges, turning on the heater causes the water temperature in the vicinity to rise, making it impossible to measure water level and water temperature simultaneously. Therefore, in order to measure water level and water temperature simultaneously, a thermometer must be installed separately from the heat-thermo water level gauge. However, to ensure the reliability of water temperature measurements, the separately installed thermometer must be separated to eliminate the influence of heat generated by the heater, which creates the problem of the device becoming larger.
本発明の実施形態はこのような事情を考慮してなされたもので、信頼性の高い温度計も兼ねる小型のヒ－トサ－モ式水位計を提供することを目的とする。 Embodiments of the present invention have been made with these circumstances in mind, and aim to provide a compact heat-thermo water level gauge that also functions as a highly reliable thermometer.
実施形態に係るヒ－トサ－モ式水位計において、水深方向に間隔を空けて配置される複数の第１温度センサと、前記第１温度センサの周囲に熱エネルギーを放出するヒータと、外側と同じ水位を保つ内側に前記第１温度センサ及び前記ヒータが配置される筒状体と、前記筒状体の外周面に配置される第２温度センサと、を備える。 The heat-thermo water level gauge according to this embodiment comprises a plurality of first temperature sensors spaced apart in the water depth direction, a heater that emits thermal energy around the first temperature sensors, a cylindrical body in which the first temperature sensors and heaters are located on the inside and maintains the same water level as the outside, and a second temperature sensor located on the outer circumferential surface of the cylindrical body.
本発明の実施形態により、信頼性の高い温度計も兼ねる小型のヒ－トサ－モ式水位計を提供することを目的とする。 The objective of this embodiment of the present invention is to provide a compact heat-thermo water level gauge that also functions as a highly reliable thermometer.
（第１実施形態）
以下、本発明の実施形態を添付図面に基づいて説明する。図１は本発明の第１実施形態を示すヒ－トサ－モ式水位計１０Ａ（１０）の概念を示すＺ－Ｘ縦断面図及びその制御部２０のブロック図である。図２はヒ－トサ－モ式水位計１０Ａ（１０）のＸ－Ｙ水平断面図である。
(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 is a Z-X vertical cross-sectional view showing the concept of a heat-thermo type water level meter 10A (10) according to a first embodiment of the present invention, and a block diagram of its control unit 20. Figure 2 is an X-Y horizontal cross-sectional view of the heat-thermo type water level meter 10A (10).
このようにヒ－トサ－モ式水位計１０Ａは、水深方向（Ｚ軸方向）に間隔を空けて配置される複数の第１温度センサ１１n（ｎ＝１～５）と、これら第１温度センサ１１n（ｎ＝１～５）の周囲に熱エネルギーを放出するヒータ１５と、外側と同じ水位を保つ内側に第１温度センサ１１n（ｎ＝１～５）及びヒータ１５が配置される筒状体１６Ａ（１６）と、この筒状体１６Ａの外周面に配置される第２温度センサ１２n（ｎ＝１～５）と、を備えている。 Thus, the heat thermo-type water level gauge 10A comprises a plurality of first temperature sensors 11 n (n=1 to 5) spaced apart in the water depth direction (Z-axis direction), a heater 15 that emits thermal energy around these first temperature sensors 11 n (n=1 to 5), a cylindrical body 16A (16) on the inside of which the first temperature sensors 11 n (n=1 to 5) and heater 15 are arranged to maintain the same water level as the outside, and a second temperature sensor 12 n (n=1 to 5) arranged on the outer surface of this cylindrical body 16A.
ヒータ１５は、図１に示すように、下端の第１温度センサ１１1から上端の第１温度センサ１１5まで水深方向（Ｚ軸方向）に沿って、断面視において図２に示すように、電気抵抗が大きい二本で一対の素線で構成されている。この二本で一対の素線は、熱伝導度の高い酸化マグネシウムを充填した封入管に、封入されている。このヒータ１５の通電で、ジュール熱の発生による熱エネルギーは、液相３１及び気相３２を介し外部放出される。 As shown in Fig. 1, the heater 15 is configured from a pair of wires with high electrical resistance along the water depth direction (Z-axis direction) from the first temperature sensor 11-1 at the bottom to the first temperature sensor 11-5 at the top, as shown in cross section in Fig. 2. The pair of wires is sealed in a sealed tube filled with magnesium oxide, which has high thermal conductivity. When electricity is applied to the heater 15, thermal energy generated by Joule heat is released to the outside via the liquid phase 31 and the gas phase 32.
なお図示においてヒータ１５は、複数の第１温度センサ１１n（ｎ＝１～５）の深さ方向全長にわたり、二本で一対の素線を配置したものを例示している。しかし、適用されるヒータ１５は、これに限定されず、複数の第１温度センサ１１n（ｎ＝１～５）の各々に、複数の二本で一対の素線の各々を対応して配置させることもできる。 In the drawing, the heater 15 is shown as an example in which two pairs of wires are arranged over the entire depth direction length of the plurality of first temperature sensors 11 n (n = 1 to 5). However, the heater 15 to be applied is not limited to this, and it is also possible to arrange a plurality of pairs of wires each corresponding to one of the plurality of first temperature sensors 11 n (n = 1 to 5).
複数の第１温度センサ１１n（ｎ＝１～５）は、その周囲が気相３２であるか液相３１であるかによって、熱エネルギーの熱拡散率が異なるために、ヒータ１５を通電した後の出力値に違いが生じる。つまり第１温度センサ１１nが気相３２に露出している場合、ヒータ１５から供給された熱エネルギーは、熱拡散率の小さな気相３２に拡散しないために、その出力値を大きく上昇させる。その一方で第１温度センサ１１nが液相３１に浸漬している場合、ヒータ１５から供給された熱エネルギーは、熱拡散率の大きな液相３１に拡散するために、その出力値はあまり上昇しない。 The thermal diffusivity of thermal energy differs between the multiple first temperature sensors 11 n (n=1 to 5) depending on whether their surroundings are the gas phase 32 or the liquid phase 31, and this causes differences in the output value after the heater 15 is energized. That is, when the first temperature sensor 11 n is exposed to the gas phase 32, the thermal energy supplied from the heater 15 does not diffuse into the gas phase 32, which has a low thermal diffusivity, and therefore the output value increases significantly. On the other hand, when the first temperature sensor 11 n is immersed in the liquid phase 31, the thermal energy supplied from the heater 15 diffuses into the liquid phase 31, which has a high thermal diffusivity, and therefore the output value does not increase very much.
筒状体１６Ａ（１６）は、容体３０に収容された液相３１に浸漬させた場合、その外側と内側が同じ水位１７を保つように構成されている。すなわち、筒状体１６Ａ（１６）は、深さ方向の下端と上端は開口を有し、容体３０の液相３１の水位１７が変化した場合であっても、その内側において水位１７が追従するように構成されている。 When immersed in the liquid phase 31 contained in the container 30, the cylindrical body 16A (16) is configured to maintain the same water level 17 on its outside and inside. In other words, the cylindrical body 16A (16) has openings at its bottom and top ends in the depth direction, and is configured so that even if the water level 17 of the liquid phase 31 in the container 30 changes, the water level 17 inside it will follow.
筒状体１６Ａ（１６）を形成する隔壁は、容体３０に収容された液相３１を、筒状体１６Ａの内側と外側に仕切るものである。このため筒状体１６Ａ（１６）の内側でヒータ１５が放出した熱エネルギーは、筒状体１６Ａ（１６）の内側に留まりその外側への漏れを抑制できる。このため筒状体１６Ａ（１６）の外周面に配置される第２温度センサ１２n（ｎ＝１～５）は、ヒータ１５が放出した熱エネルギーの影響を受けずに、その外側の液相３１の温度（水温）を正確に検出できる。 The partition wall forming the cylindrical body 16A (16) separates the liquid phase 31 contained in the container 30 into an inside and an outside of the cylindrical body 16A. Therefore, the thermal energy emitted by the heater 15 inside the cylindrical body 16A (16) remains inside the cylindrical body 16A (16) and is prevented from leaking to the outside. Therefore, the second temperature sensors 12 n (n = 1 to 5) arranged on the outer circumferential surface of the cylindrical body 16A (16) can accurately detect the temperature (water temperature) of the liquid phase 31 outside without being affected by the thermal energy emitted by the heater 15.
なお液相３１を内側と外側に仕切る筒状体１６Ａの隔壁の材質は、金属、ガラス、樹脂等が挙げられ特に限定されないが、熱伝達係数の小さいものが望ましい。筒状体１６Ａの水平断面も円筒形状を例示しているがこれに限定されず、矩形、楕円等、任意の形状をとることができる。 The material of the partition wall of the cylindrical body 16A that separates the liquid phase 31 into an inside and outside may be metal, glass, resin, etc., but is not particularly limited, and is preferably a material with a low heat transfer coefficient. The horizontal cross section of the cylindrical body 16A is also shown as being cylindrical, but is not limited to this and can be any shape, such as rectangular or elliptical.
第１温度センサ１１n（ｎ＝１～５）及び第２温度センサ１２n（ｎ＝１～５）は、共通の構成を持つもので、先端が閉じられているシース管に熱電対の素線を収容したものである。そして、このシース管には、素線とともに絶縁材として酸化マグネシウムが充填されている。熱電対は、異種金属の素線が先端において溶接され、その反対端で検出される熱起電力に基づいて、この先端の周辺温度が計測される。 The first temperature sensors 11 n (n = 1 to 5) and the second temperature sensors 12 n (n = 1 to 5) have a common configuration, in which a thermocouple wire is housed in a sheath tube with a closed tip. This sheath tube is filled with magnesium oxide as an insulating material along with the wire. The thermocouple has wires made of different metals welded at their tips, and the ambient temperature at this tip is measured based on the thermoelectromotive force detected at the opposite end.
そして図２に示すように、第１温度センサ１１n（ｎ＝１～５）は、Ｘ－Ｙ水平断面視においてヒータ１５の外周に、同心円状に配置されている。また第２温度センサ１２n（ｎ＝１～５）も、Ｘ－Ｙ水平断面視において筒状体１６Ａ（１６）の外周に、同心円状に配置されている。なおＸ－Ｙ水平断面視における第１温度センサ１１n（ｎ＝１～５）及び第２温度センサ１２n（ｎ＝１～５）の配置は特に限定されない。 2, the first temperature sensors 11 n (n=1 to 5) are arranged concentrically around the outer periphery of the heater 15 in the XY horizontal cross section. The second temperature sensors 12 n (n=1 to 5) are also arranged concentrically around the outer periphery of the cylindrical body 16A (16) in the XY horizontal cross section. The arrangement of the first temperature sensors 11 n ( n=1 to 5) and the second temperature sensors 12 n (n=1 to 5) in the XY horizontal cross section is not particularly limited.
また第２温度センサ１２n（ｎ＝１～５）は、筒状体１６の長さ方向に、第１温度センサ１１n（ｎ＝１～５）と、それぞれの高さを揃えて複数配置されている。これにより、容体３０に収容されている液相３１及び気相３２の温度及び第１温度センサ１１nによる水位判定の妥当性を検証することができる。さらには、液相３１や気相３２の深さ方向の温度分布を調べることもできる。しかし、そのような形態に限定されるものではなく、第２温度センサ１２n（ｎ＝１～５）は、第１温度センサ１１n（ｎ＝１～５）とそれぞれの高さを揃える必要はなく、数も合わせる必要もなく、例えば一つだけでもよい。 Furthermore, multiple second temperature sensors 12 n (n = 1 to 5) are arranged in the longitudinal direction of the cylindrical body 16, with their respective heights aligned with the first temperature sensors 11 n (n = 1 to 5). This makes it possible to verify the temperatures of the liquid phase 31 and gas phase 32 contained in the container 30 and the validity of the water level determination by the first temperature sensor 11 n . Furthermore, it is also possible to examine the temperature distribution in the depth direction of the liquid phase 31 and gas phase 32. However, this is not limited to such a configuration, and the second temperature sensors 12 n (n = 1 to 5) do not need to be aligned with the first temperature sensors 11 n (n = 1 to 5) in terms of their height or number; for example, only one may be used.
図１に戻って説明を続ける。ヒ－トサ－モ式水位計の制御部２０は、ヒータ１５に電流を流し熱エネルギーを放出させる通電部２５と、複数の第１温度センサ１１n（ｎ＝１～５）から温度信号を受信する第１受信部２１と、熱エネルギーを放出後の複数の第１温度センサ１１n（ｎ＝１～５）の温度信号の変化量に基づいて水位１７を判定する水位判定部２６と、複数の第２温度センサ１２n（ｎ＝１～５）から温度信号を受信する第２受信部２２と、ヒータ１５から熱エネルギーが放出されているか否かにかかわらず受信した第２温度センサ１２n（ｎ＝１～５）の温度信号に基づいて液相３１の温度（水温）を判定する温度判定部２７と、を備えている。 Continuing the explanation, returning to Figure 1, the control unit 20 of the heat thermometer water level gauge comprises an electric current supply unit 25 that passes current through the heater 15 to cause it to emit thermal energy, a first receiving unit 21 that receives temperature signals from a plurality of first temperature sensors 11 n (n = 1 to 5), a water level determination unit 26 that determines the water level 17 based on the amount of change in the temperature signals of the plurality of first temperature sensors 11 n (n = 1 to 5) after the emission of thermal energy, a second receiving unit 22 that receives temperature signals from a plurality of second temperature sensors 12 n (n = 1 to 5), and a temperature determination unit 27 that determines the temperature of the liquid phase 31 (water temperature) based on the temperature signals received from the second temperature sensors 12 n (n = 1 to 5) regardless of whether thermal energy is being emitted from the heater 15.
通電部２５は、オペレータの指令に基づいて、ヒータ１５に電流を流しジュール熱を発生させ、周辺に一定量の熱エネルギーを放出させる。なおヒータ１５に流す電流の大きさ及び時間は、予め設定することができ水位判定部２６から制御される。 Based on operator commands, the power supply unit 25 passes current through the heater 15 to generate Joule heat and release a certain amount of thermal energy into the surrounding area. The magnitude and duration of the current passed through the heater 15 can be set in advance and are controlled by the water level determination unit 26.
第１受信部２１及び第２受信部２２の各々は、複数の第１温度センサ１１n（ｎ＝１～５）及び複数の第２温度センサ１２n（ｎ＝１～５）の各々から温度信号を受信する。これら第１受信部２１及び第２受信部２２の各々は、通電部２５の動作とは無関係にリアルタイムで温度信号を受信している。 Each of the first receiving unit 21 and the second receiving unit 22 receives a temperature signal from each of the plurality of first temperature sensors 11 n (n=1 to 5) and the plurality of second temperature sensors 12 n (n=1 to 5). Each of the first receiving unit 21 and the second receiving unit 22 receives the temperature signal in real time, regardless of the operation of the power supply unit 25.
第１温度センサ１１n（ｎ＝１～５）及び第２温度センサ１２n（ｎ＝１～５）の各々からは、ｍＶオーダーの電圧が温度信号として常時出力されている。ヒータ１５に電流を流して発生させたジュール熱は、その周囲が気相３２であるか液相３１であるかによって熱拡散率が異なるために、電圧出力（温度信号）に違いを生じさせる。 Each of the first temperature sensors 11 n (n=1 to 5) and the second temperature sensors 12 n (n=1 to 5) constantly outputs a voltage on the order of mV as a temperature signal. The Joule heat generated by passing a current through the heater 15 has a different thermal diffusivity depending on whether the surroundings are the gas phase 32 or the liquid phase 31, and this causes a difference in the voltage output (temperature signal).
第１受信部２１及び第２受信部２２の各々は、第１温度センサ１１n及び第２温度センサ１２nから出力される微弱な電圧出力をアナログ回路で処理可能な電圧レベルの温度信号に変換して水位判定部２６に出力する。 The first receiving unit 21 and the second receiving unit 22 each convert the weak voltage output from the first temperature sensor 11 n and the second temperature sensor 12 n into a temperature signal of a voltage level that can be processed by an analog circuit and output it to the water level determination unit 26.
水位判定部２６は、ヒータ１５による熱エネルギー放出後の温度信号の変化量に基づいて、対応する第１温度センサ１１n（ｎ＝１～５）が液相３１及び気相３２のいずれに存在するか識別する。具体的には、温度信号の変化量が規定値より小さければ液相３１、大きければ気相３２に、対応する第１温度センサ１１nが位置していると、認定される。そして水位判定部２６は、液相３１及び気相３２の識別結果が切り替わる二つの第１温度センサ１１nの間に水位１７があると判定する。 The water level determination unit 26 determines whether the corresponding first temperature sensor 11 n (n=1 to 5) is in the liquid phase 31 or the gas phase 32, based on the amount of change in the temperature signal after the heater 15 releases thermal energy. Specifically, if the amount of change in the temperature signal is smaller than a specified value, the corresponding first temperature sensor 11 n is determined to be in the liquid phase 31, and if the amount of change is greater than a specified value, the corresponding first temperature sensor 11 n is determined to be in the gas phase 32. The water level determination unit 26 then determines that the water level 17 is between the two first temperature sensors 11 n where the identification result switches between the liquid phase 31 and the gas phase 32.
その一方で、温度判定部２７では、ヒータ１５に熱エネルギーが放出されているか否かにかかわらず、第２受信部２２で受信した温度信号に基づいて、液相３１と判定された位置の温度を判定する。また、気相３２と判定された位置の温度も判定することができる。 On the other hand, the temperature determination unit 27 determines the temperature of the position determined to be in the liquid phase 31 based on the temperature signal received by the second receiving unit 22, regardless of whether thermal energy is being released to the heater 15. It can also determine the temperature of the position determined to be in the gas phase 32.
（第２実施形態）
次に図３から図４を参照して本発明における第２実施形態について説明する。図３は本発明の第２実施形態を示すヒ－トサ－モ式水位計１０Ｂ（１０）の概念を示すＺ－Ｘ縦断面図である。図４は第２実施形態に係るヒ－トサ－モ式水位計１０Ｂ（１０）のＸ－Ｙ水平断面図である。第２実施形態のヒ－トサ－モ式水位計１０Ｂは、上述した第１実施形態のヒ－トサ－モ式水位計１０Ａの構成のうち、筒状体１６Ｂ（１６）の構造が異なる。なお、図３及び図４において図１及び図２と共通の構成又は機能を有する部分は、同一符号で示し、重複する説明を省略する。
Second Embodiment
Next, a second embodiment of the present invention will be described with reference to Figures 3 and 4. Figure 3 is a Z-X vertical cross-sectional view showing the concept of a heat thermostatic water level gauge 10B (10) according to the second embodiment of the present invention. Figure 4 is an X-Y horizontal cross-sectional view of the heat thermostatic water level gauge 10B (10) according to the second embodiment. The heat thermostatic water level gauge 10B of the second embodiment differs from the heat thermostatic water level gauge 10A of the first embodiment described above in the structure of the cylindrical body 16B (16). In Figures 3 and 4, parts having the same structure or function as those in Figures 1 and 2 are designated by the same reference numerals, and duplicate explanations will be omitted.
第２実施形態のヒ－トサ－モ式水位計１０Ｂにおいて、筒状体１６Ｂは、その外側と内側を隔てる隔壁が中空構造３５を持つ。このように筒状体１６Ｂの隔壁が二重壁で密閉された中空構造３５を持つことで、筒状体１６Ｂの内側と外側の断熱効果が向上し、外側に配置される第２温度センサ１２n（ｎ＝１～５）は、内側でヒータ１５が放出した熱エネルギーの影響を受けずに、液相３１又は気相３２の温度をさらに正確に検出できる。 In the heat-thermo type water level gauge 10B of the second embodiment, the partition wall separating the outside and inside of the cylindrical body 16B has a hollow structure 35. By having the partition wall of the cylindrical body 16B have the double-walled, sealed hollow structure 35 in this way, the thermal insulation effect between the inside and outside of the cylindrical body 16B is improved, and the second temperature sensor 12 n (n=1 to 5) arranged on the outside can more accurately detect the temperature of the liquid phase 31 or the gas phase 32 without being affected by the thermal energy released by the heater 15 inside.
そして筒状体１６Ｂの隔壁の中空構造３５は減圧密閉して真空状態にすることで、さらに断熱効果が向上し、第２温度センサ１２n（ｎ＝１～５）の液相３１又は気相３２の温度をさらに正確に検出できる。なお、第２実施形態における筒状体１６Ｂは隔壁が二重壁で密閉された中空構造３５とすることで筒状体１６の内側と外側の断熱効果を向上させるため、第１実施形態における筒状体１６Ａほど隔壁の材質を限定する必要は無い。 The hollow structure 35 of the partition wall of the cylindrical body 16B is reduced in pressure and sealed to create a vacuum, thereby further improving the heat insulating effect and enabling the second temperature sensors 12 n (n = 1 to 5) to more accurately detect the temperature of the liquid phase 31 or gas phase 32. Note that the cylindrical body 16B in the second embodiment has a hollow structure 35 with a sealed double wall for the partition wall, thereby improving the heat insulating effect between the inside and outside of the cylindrical body 16, so there is no need to limit the material of the partition wall as much as in the cylindrical body 16A in the first embodiment.
（第３実施形態）
次に図５から図６を参照して本発明における第３実施形態について説明する。図５は本発明の第３実施形態を示すヒ－トサ－モ式水位計１０Ｃ（１０）の概念を示すＺ－Ｘ縦断面図である。図６は第３実施形態に係るヒ－トサ－モ式水位計１０Ｃ（１０）のＸ－Ｙ水平断面図である。第３実施形態のヒ－トサ－モ式水位計１０Ｃは、上述した第１実施形態及び第２実施形態のヒ－トサ－モ式水位計１０Ａ、１０Ｂの構成のうち、筒状体１６Ｃ（１６）の構造が異なる。なお、図５及び図６において図１及び図２と共通の構成又は機能を有する部分は、同一符号で示し、重複する説明を省略する。
(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to Figures 5 and 6. Figure 5 is a Z-X vertical cross-sectional view showing the concept of a heat thermostatic water level gauge 10C (10) according to the third embodiment of the present invention. Figure 6 is an X-Y horizontal cross-sectional view of the heat thermostatic water level gauge 10C (10) according to the third embodiment. The heat thermostatic water level gauge 10C of the third embodiment differs from the heat thermostatic water level gauges 10A and 10B of the first and second embodiments described above in terms of the structure of the cylindrical body 16C (16). Note that in Figures 5 and 6, parts having the same configuration or function as those in Figures 1 and 2 are designated by the same reference numerals, and redundant explanations will be omitted.
第３実施形態のヒ－トサ－モ式水位計１０Ｃにおいて、筒状体１６Ｃは、隔壁の中空構造３５で循環させる媒体３８のインレット３６とアウトレット３７が設けられている。このように、インレット３６から導入された媒体３８は、筒状体１６Ｃの中空構造３５の水深方向及び周方向を循環して、アウトレット３７から排出される。これにより、筒状体１６Ｃの内側でヒータ１５が放出した熱エネルギーは、媒体３８とともに外部に排出される。 In the third embodiment of the heat-thermo water level gauge 10C, the cylindrical body 16C is provided with an inlet 36 and outlet 37 for the medium 38 to circulate in the hollow structure 35 of the partition. In this way, the medium 38 introduced from the inlet 36 circulates in the depth direction and circumferential direction of the hollow structure 35 of the cylindrical body 16C and is discharged from the outlet 37. As a result, the thermal energy released by the heater 15 inside the cylindrical body 16C is discharged to the outside along with the medium 38.
これにより、第２温度センサ１２n（ｎ＝１～５）までヒータ１５の熱エネルギーが到達することが抑制され、液相３１または気相３２の温度をさらに正確に検出できる。なお、第３実施形態における筒状体１６Ｃは中空構造３５に媒体３８を循環させることで断熱効果を向上させるため、第１実施形態における筒状体１６Ａほど隔壁の材質を限定する必要は無い。また循環させる媒体３８としては、液体や気体も取り得る。 This prevents the thermal energy of the heater 15 from reaching the second temperature sensors 12 n (n=1 to 5), enabling more accurate detection of the temperature of the liquid phase 31 or the gas phase 32. Note that, since the cylindrical body 16C in the third embodiment improves the heat insulating effect by circulating the medium 38 in the hollow structure 35, it is not necessary to limit the material of the partition wall as much as in the cylindrical body 16A in the first embodiment. Furthermore, the circulated medium 38 can be a liquid or a gas.
各実施形態に係るヒ－トサ－モ式水位計１０によれば、口径の小さい配管に挿入し、内部の水位及び温度を同時に計測できる。すなわち、各実施形態で記載された構成を備えることにより、筒状体１６は、ヒータ１５の熱エネルギーが第２温度センサ１２に伝わることを防ぐ。これにより、第２温度センサ１２およびヒータ１５の距離を近づけた場合でも、ヒータ１５が放出した熱エネルギーの影響を受けずに、第２温度センサ１２が液相３１または気相３２の温度を正確に検出できる。つまり、ヒートサーモ式水位計１０のＸ―Ｙ水平断面における断面積を小さくできるので、ヒートサーモ式水位計１０を口径の小さい配管に挿入し、内部の水位及び水温を同時に計測できる。 The heat thermostatic water level gauge 10 according to each embodiment can be inserted into a small-diameter pipe and measure the internal water level and temperature simultaneously. That is, by having the configuration described in each embodiment, the cylindrical body 16 prevents the thermal energy of the heater 15 from being transmitted to the second temperature sensor 12. As a result, even when the second temperature sensor 12 and heater 15 are brought close to each other, the second temperature sensor 12 can accurately detect the temperature of the liquid phase 31 or gas phase 32 without being affected by the thermal energy emitted by the heater 15. In other words, because the cross-sectional area of the heat thermostatic water level gauge 10 in the X-Y horizontal cross section can be reduced, the heat thermostatic water level gauge 10 can be inserted into a small-diameter pipe and measure the internal water level and temperature simultaneously.
以上述べた少なくともひとつの実施形態のヒ－トサ－モ式水位計によれば、筒状体の内側に第１温度センサ及びヒータが配置し、その外周面に第２温度センサを配置することにより、信頼性の高い温度計も兼ねる小型のヒ－トサ－モ式水位計が提供される。 In at least one embodiment of the heat-thermo water level gauge described above, a first temperature sensor and heater are placed inside the cylindrical body, and a second temperature sensor is placed on its outer surface, providing a compact heat-thermo water level gauge that also functions as a highly reliable thermometer.
本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更、組み合わせを行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。 While several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments may be embodied in a variety of other forms, and various omissions, substitutions, modifications, and combinations may be made without departing from the spirit of the invention. These embodiments and their variations are within the scope of the invention and its equivalents as defined in the claims, as well as the scope and spirit of the invention.
１０（１０Ａ，１０Ｂ，１０Ｃ）…ヒートサーモ式水位計、１１…第１温度センサ、１２…第２温度センサ、１５…ヒータ、１６（１６Ａ，１６Ｂ，１６Ｃ）…筒状体、１７…水位、２０…制御部、２１…第１受信部、２２…第２受信部、２５…通電部、２６…水位判定部、２７…温度判定部、３０…容体、３１…液相、３２…気相、３５…中空構造、３６…インレット、３７…アウトレット、３８…ガス媒体。 10 (10A, 10B, 10C)...Heat thermostatic water level gauge, 11...First temperature sensor, 12...Second temperature sensor, 15...Heater, 16 (16A, 16B, 16C)...Cylindrical body, 17...Water level, 20...Control unit, 21...First receiving unit, 22...Second receiving unit, 25...Electrification unit, 26...Water level determination unit, 27...Temperature determination unit, 30...Volume, 31...Liquid phase, 32...Gas phase, 35...Hollow structure, 36...Inlet, 37...Outlet, 38...Gaseous medium.
Claims (5)
前記第１温度センサの周囲に熱エネルギーを放出するヒータと、
外側と同じ水位を保つ内側に前記第１温度センサ及び前記ヒータが配置される筒状体と、
前記筒状体の外周面に配置される第２温度センサと、を備えるヒ－トサ－モ式水位計。 a plurality of first temperature sensors arranged at intervals in a water depth direction;
a heater that emits thermal energy around the first temperature sensor;
a cylindrical body in which the first temperature sensor and the heater are arranged and whose inside maintains the same water level as the outside;
A heat-thermo type water level gauge comprising: a second temperature sensor arranged on the outer peripheral surface of the cylindrical body.
前記筒状体は、前記外側と前記内側を隔てる隔壁が中空構造を持つヒ－トサ－モ式水位計。 The heat-thermo type water level meter according to claim 1,
The cylindrical body is a heat-thermo type water level gauge in which the partition wall separating the outside and the inside has a hollow structure.
前記隔壁の前記中空構造は減圧密閉されるか又は媒体を循環されるヒ－トサ－モ式水位計。 The heat-thermo type water level meter according to claim 2,
The hollow structure of the partition is a heat-thermo type water level gauge in which the hollow structure is sealed under reduced pressure or in which a medium is circulated.
前記筒状体の前記水深方向に前記第２温度センサが複数配置されているヒ－トサ－モ式水位計。 The heat-thermo type water level meter according to any one of claims 1 to 3,
A heat thermostatic water level gauge in which a plurality of second temperature sensors are arranged in the water depth direction of the cylindrical body.
前記ヒータに電流を流して前記熱エネルギーを放出させる通電部と、
複数の前記第１温度センサから温度信号を受信する第１受信部と、
前記熱エネルギーを放出後の複数の前記第１温度センサの温度信号の変化量に基づいて水位を判定する水位判定部と、
複数の前記第２温度センサから温度信号を受信する第２受信部と、
前記ヒータに前記熱エネルギーが放出されているか否かにかかわらず、受信した前記第２温度センサの温度信号に基づいて、前記筒状体の前記外側の水又は気体の温度を判定する温度判定部と、を備えるヒ－トサ－モ式水位計。 The heat-thermo type water level meter according to any one of claims 1 to 3,
an electric current supply unit that supplies current to the heater to cause the heater to emit the thermal energy;
a first receiving unit that receives temperature signals from the plurality of first temperature sensors;
a water level determination unit that determines the water level based on the amount of change in the temperature signals of the plurality of first temperature sensors after the thermal energy is released;
a second receiving unit that receives temperature signals from the plurality of second temperature sensors;
A heat thermostatic water level meter comprising: a temperature determination unit that determines the temperature of the water or gas outside the cylindrical body based on the temperature signal received from the second temperature sensor, regardless of whether the thermal energy is being released to the heater.
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