JPS60210724A - Measurement of liquid level height - Google Patents
Measurement of liquid level heightInfo
- Publication number
- JPS60210724A JPS60210724A JP6667084A JP6667084A JPS60210724A JP S60210724 A JPS60210724 A JP S60210724A JP 6667084 A JP6667084 A JP 6667084A JP 6667084 A JP6667084 A JP 6667084A JP S60210724 A JPS60210724 A JP S60210724A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- liquid
- liquid level
- transmission pipe
- air transmission
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
- G01F23/16—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid
- G01F23/165—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid of bubbler type
Abstract
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は液面の高さを測定する方法に関する。[Detailed description of the invention] <Industrial application field> The present invention relates to a method for measuring the height of a liquid level.
〈従来技術〉
従来、容器内の液面の高さを測定する方法としては、超
音波、電極式あるいは静電容量式のレベル計にＬる方法
か又は容器に設けた覗き窓から目視する方法上棟るのが
一般的である。しかし、前者の方法は、装置の価格が高
くまた信頼性に欠けるという不都合があり、また後者の
方法は覗き窓として金属を用いれず、このため強度上の
問題があシ、又電気的な値として液面の高さを出力する
ことができない不都合があった。しかも、これらの方法
では、各容器ごとにレベル計あるいは覗き窓を設ける必
要があるので、複数の容器の液面を測定する場合には、
上記不都合は更に顕著となる。<Prior art> Conventionally, methods for measuring the height of the liquid level in a container include using an ultrasonic, electrode-type, or capacitance-type level meter, or visually observing it through a viewing port provided in the container. It is common to build a new building. However, the former method has disadvantages in that the equipment is expensive and lacks reliability, and the latter method does not use metal as the viewing window, which causes problems with strength and electrical values. There was an inconvenience that it was not possible to output the height of the liquid level. Moreover, these methods require a level meter or viewing window to be installed in each container, so when measuring the liquid level in multiple containers,
The above-mentioned disadvantage becomes even more remarkable.
〈発明の目的〉
本発明は上記従来技術の不都合に鑑み、信頼性が高く、
かつ液面の高さを電気的な値として出力し得、しかも低
コストにて笑施することができる液面高さ測定方法を提
供することを目的とする。<Object of the invention> In view of the disadvantages of the above-mentioned prior art, the present invention has high reliability,
Another object of the present invention is to provide a liquid level height measuring method that can output the liquid level height as an electrical value and can be performed at low cost.
〈発明の構成〉
上記目的全達成する本発明の構成は液中に差し込まれた
送気管の上端からガスを圧送して該送気管中の液を全て
追い出した時の該送気管内の圧力をめ、この圧力の値及
び液の比重に基づいて送気管の下畔カら液面までの高さ
を算出することを特徴とする特
〈実施例〉
以下、本発明の笑施例番図面を参照して詳細に説明する
。<Structure of the Invention> The structure of the present invention which achieves all of the above objects is to forcefully feed gas from the upper end of the air pipe inserted into the liquid, and to control the pressure inside the air pipe when all the liquid in the air pipe is expelled. Embodiment Hereinafter, the drawings of an embodiment of the present invention will be described. This will be explained in detail with reference to the following.
実施例１
本実施例は、液を貯留する容器が加圧されていない場合
又は加圧されていてもその圧力が予め判明している場合
に爵適に実施できるものである。即ち、本実施例を行う
具体的装置を第１図に示す工うに、密閉容器１には液２
が貯留されると共に液２には密閉容器１を貫通する送気
管３が差し込まれる一方、送気管３の上端には圧力計５
が取り付けられ、また送気管３には開閉弁７を介してガ
ス供給源（図示省略ンが連通し、更に密閉容器１の上部
には大気に連通ずる管を開閉する開閉弁６が設けられて
いる。この工うな装置を用い液面を測定するには次の様
に行う。まず、開閉弁７を開いて送気管３内に加圧され
たガス４を圧送し、送気管３内の圧力を従々に高めて送
気管３内の液２を追い出し、言い替れば送気管３内の液
面全下降させる。そして、送気管３内の液面が送気管３
の下端まで達してまさに送気管３の下端からバブリング
が起きる時（以下、平衡時という）、開閉弁７ｔ−閉じ
てガス４の圧送を止め、圧力計５に↓シ送気管３内の圧
力を測定する。尚、平衡時に開閉弁７を閉じずに第１図
に示す工うに送気管３の下端からバブリングを起こさせ
ても良いが、平衡時に比べ送気管３内の圧力が上昇しな
い工うに注意して圧力計５にニジ圧力を測定し々ければ
ならないし、また送気管３内の圧損が無視できる場合に
限られる。いずれにしても、送気管３の液２を全て追い
出した時の圧力Ｐｐ’を測定し、この圧力Ｐ、と液２の
比重ｎに基づいて送気管３の下端から液面までの高さＨ
’を下式（１）に従って算出する。但し、埒は容器１内
に存在する〃ス１０の圧力である。Example 1 This example can be suitably implemented when the container storing the liquid is not pressurized or when the pressure is known in advance even if it is pressurized. That is, the specific apparatus for carrying out this embodiment is shown in FIG.
is stored, and an air pipe 3 that passes through the airtight container 1 is inserted into the liquid 2, while a pressure gauge 5 is installed at the upper end of the air pipe 3.
A gas supply source (not shown) is connected to the air supply pipe 3 via an on-off valve 7, and an on-off valve 6 is provided at the top of the closed container 1 to open and close the pipe communicating with the atmosphere. To measure the liquid level using this device, proceed as follows: First, open the on-off valve 7 to forcefully feed the pressurized gas 4 into the air pipe 3 to reduce the pressure inside the air pipe 3. gradually increases to expel the liquid 2 in the air pipe 3, in other words, the liquid level in the air pipe 3 is completely lowered.
When it reaches the lower end and bubbling occurs from the lower end of the air pipe 3 (hereinafter referred to as equilibrium), the on-off valve 7t is closed to stop the pressure feeding of the gas 4, and the pressure inside the air pipe 3 is indicated by the pressure gauge 5. Measure. Note that during equilibrium, bubbling may be caused from the lower end of the air pipe 3 as shown in Fig. 1 without closing the on-off valve 7, but care must be taken to ensure that the pressure inside the air pipe 3 does not rise compared to when it is at equilibrium. It is necessary to constantly measure the pressure with the pressure gauge 5, and it is limited to cases where the pressure loss in the air supply pipe 3 can be ignored. In any case, the pressure Pp' when all the liquid 2 in the air pipe 3 is expelled is measured, and the height H from the lower end of the air pipe 3 to the liquid level is determined based on this pressure P and the specific gravity n of the liquid 2.
' is calculated according to the following formula (1). However, pressure is the pressure of the gas 10 existing in the container 1.
Ｈ＝ （ＰＰ−Ｐ、 ）／ｎ ＝・（１）（１）式及び
Ｐ７ ＋ ｎ ｔ”予めコンピュータ等に記憶させてお
き、このコンピュータに圧力計５からの圧力ＰＰヲ入力
すれば、−コンピュータから直ちに高さＨの値をデジタ
ルあるいはアナ四グにニジ出力することができる。更に
、密閉容器１の床面から送気管３の下端までの高さｈｖ
上記゛高さＨに加えて、密閉容器１の床面から液面まで
の高さを算出する工うにしても良い。また、開閉弁６１
１−開いて容器１内に存在するガス１０の圧力を大気圧
又は大気圧に近い値とすることができれば、予めガス１
０の圧力均が不明であっても、液面の高さを算出するこ
とができる。H= (PP-P, )/n =・(1) (1) formula and P7 + n t" If you store it in a computer etc. in advance and input the pressure PP from the pressure gauge 5 into this computer, - The computer can immediately output the height H value digitally or analogously.Furthermore, the height hv from the floor of the closed container 1 to the lower end of the air pipe 3 can be output directly from the computer.
In addition to the above height H, the height from the floor of the closed container 1 to the liquid level may be calculated. In addition, the on-off valve 61
1-If the pressure of the gas 10 present in the open container 1 can be brought to atmospheric pressure or a value close to atmospheric pressure, the gas 10 can be
Even if the pressure average at 0 is unknown, the height of the liquid level can be calculated.
実施例２
第２図に示す装置は密閉容器１内に存在するガス１０の
圧力を測定する圧力計８を設けたもので、その他は第１
図に示す装置と同様である。Embodiment 2 The apparatus shown in FIG.
The device is similar to the one shown in the figure.
この装置に工れば、ガス１０の圧力ＰＴｔ−圧力計８に
工＃）実際に測定しながら、上式（１）に従って上述し
た工うに液面の高さを算出することができ、密閉容器ｌ
内のガス１０の圧力が不明で、しかも、開閉弁６を開く
ことが不都合な場合に有益である。If this device is installed, it is possible to calculate the height of the liquid level according to the above formula (1) while actually measuring the pressure PTt of gas 10 - pressure gauge 8; l
This is useful in cases where the pressure of the gas 10 inside is unknown and it is inconvenient to open the on-off valve 6.
実施例３
第３図に示す本装置は第１図の圧力計５に代えて、送気
管３内の圧力へと容器１内のガスの圧力〜との差圧全測
定する差圧計９ｖｉｌ−設けたもので、その他の構成は
第１図に示す装置と同様である。この装置に工れば、差
圧（ＰＰ−Ｐ、）を実際に測定しながら上式（１）に従
って上述した工うに液面の高さを算出することができ、
実施例２と同様密閉容器１内のガスの圧力が不明で、し
かも開閉弁６ｔ？開くことが不都合な場合に有益である
。Embodiment 3 The present device shown in FIG. 3 is equipped with a differential pressure gauge 9vil for measuring the total pressure difference between the pressure in the air supply pipe 3 and the pressure of the gas in the container 1, in place of the pressure gauge 5 in FIG. The other configurations are the same as the device shown in FIG. If this device is installed, the height of the liquid level can be calculated according to the above formula (1) while actually measuring the differential pressure (PP-P,).
As in Example 2, the pressure of the gas inside the closed container 1 is unknown, and the on-off valve is 6t? Useful when opening is inconvenient.
実施例４
第４図に示す本装置は、ＶＡＤ法に工り光フアイバ用母
材を製造する反応装置へ原料ガスを送給する原料タンク
へ原料液を補給するサービスタンク１１を示すものであ
ｐ１本発明を実施できる工う圧力計１５及び開閉弁等を
設けたものである。即ち、サービスタンク１１には原料
液１２が貯留されると共に該原料液１２には送気管とし
て配管１３がサービスタンク１１を貫通して差し込まれ
、更に該配管１３には開閉弁１７，１８．１９が介装さ
れ、配管１３の上端はガス供給源（図示省略）が連結さ
れている。Embodiment 4 The present apparatus shown in FIG. 4 shows a service tank 11 for replenishing raw material liquid to a raw material tank that supplies raw material gas to a reaction apparatus for producing a base material for optical fiber using the VAD method. p1 A pressure gauge 15, an on-off valve, etc., which can be used to carry out the present invention, are provided. That is, a raw material liquid 12 is stored in the service tank 11, and a pipe 13 as an air supply pipe is inserted into the raw material liquid 12 by penetrating the service tank 11, and furthermore, the pipe 13 has on-off valves 17, 18, 19. is interposed, and the upper end of the pipe 13 is connected to a gas supply source (not shown).
配管１３に対し、開閉弁１９．１７の間には圧力計が連
通され、また開閉弁１７．１８の間には原料タンク（図
示省略）につながる配管が開閉弁２０を介し連結してい
る。ｉた、チービスタンク１１の上部には圧送用のガス
供給源につながる管路が開閉弁２３′に介して連通して
おｐ、また大気に連通ずる管路が開閉弁１６を介し連通
している。従って、サービスタンク１１から原料タンク
へ原料液を補給するには、第５図に示す工うに（第５図
〜第７図において、黒ぬりの開閉弁は閉全示し、白ぬき
の開閉弁は開會示している。）開閉弁２３ｔ−開いて、
圧送用のガス２２をサービスタンク１１に供給し、サー
ビスタンク１１内のガス２１の圧力を高め、配管１３の
下端力）ら開閉弁１８．２０を通って原料＼
液を原料タンクに送ｐ、送シ終えたら配管中の残液を原
料タンクに送るため、第６図に示す工うに開閉弁１８ｔ
−閉じて加圧されたガス１４を配管１３゛中に導く。そ
して、サービスタンク１１の液面の高さＨを測定するに
は、第７図に示す工うに、開閉弁２０を閉とすると共に
開閉弁１６、−７．１８．１９を開とし、加圧されたガ
ス１４を配管１３中に圧送してバブリングさせ、この時
の配管１３内の圧力を圧力計１５に↓シ測定し、この測
定した圧力等に基づき前述した（１）式に１シ液面の高
さＨｔ−算出する。なお、以上述べた実施例において使
用されるガス４゜１４としては空気が一般に用いられる
が、液２゜１２が大気中の水分又は酸素と反応するもの
であるときは、露点の低い不活性ガスを用いると良い。A pressure gauge is connected to the piping 13 between the on-off valves 19.17, and a piping connected to a raw material tank (not shown) is connected between the on-off valves 17.18 via an on-off valve 20. Additionally, at the top of the Chibis tank 11, a pipe line that connects to a gas supply source for pressure feeding is communicated via an on-off valve 23', and a pipe line that communicates with the atmosphere is communicated via an on-off valve 16. . Therefore, in order to replenish raw material liquid from the service tank 11 to the raw material tank, it is necessary to carry out the procedure shown in Fig. 5 (in Figs. ) On-off valve 23t - open,
Gas 22 for pressure feeding is supplied to the service tank 11, the pressure of the gas 21 in the service tank 11 is increased, and the raw material\liquid is sent to the raw material tank from the lower end of the pipe 13 through the on-off valve 18.20. After the transfer is completed, in order to send the remaining liquid in the piping to the raw material tank, the on-off valve 18t shown in Figure 6 is installed.
- conducting the closed and pressurized gas 14 into the pipe 13'; To measure the height H of the liquid level in the service tank 11, as shown in FIG. The gas 14 is force-fed into the pipe 13 and bubbled, and the pressure inside the pipe 13 at this time is measured by the pressure gauge 15. Based on the measured pressure, etc., the above-mentioned formula (1) is calculated. Calculate the height Ht of the surface. Note that air is generally used as the gas 4゜14 used in the above embodiments, but when the liquid 2゜12 reacts with moisture or oxygen in the atmosphere, an inert gas with a low dew point may be used. It is better to use
〈発明の効果〉
以上、実施例に基づいて具体的に説明したように、本発
明は圧力針等の機器を用いて実施することができ、これ
らとコンビ二一タとを連結して液面の高さを電気的なア
ナログ信号やディジタル信号として出力することができ
る。しかも、測定する容器が複数ある場合でも、送気管
を複数に分岐して各容器に接続すれば、圧力計は１個で
も良く、このことは本発明ｔ−笑施する装置が簡単とな
シ低コストとなることを意味する。<Effects of the Invention> As described above in detail based on the examples, the present invention can be implemented using devices such as pressure needles, and these can be connected to a combinator to adjust the liquid level. The height can be output as an electrical analog signal or digital signal. Moreover, even if there are multiple containers to be measured, if the air supply pipe is branched into multiple units and connected to each container, only one pressure gauge is required, which means that the device implemented in the present invention can be easily constructed. This means lower costs.
第１図〜第７図は本発明に係シ、第１図、第２図、第３
図、第４図は各々本発明を冥施す゛る具体的な装置の概
略構成図、第５図、第６図。
第７図は各々第４図に示す装置の作用を説明する説明図
である。
２は液、
３は送気管、
４．１４は加圧されたガス、
５．８．１５は圧力計、
６．７，１６，１７，１８，１９，２０．２３は開閉弁
、
９は差圧針、
１１はサービスタンク、
１２は原料液、
１３は配管である。
特許出願人
住友電気工業株式会社
代 理 人
弁理士 光 石 士 部（他１名）1 to 7 are related to the present invention, and FIG. 1, FIG. 2, and FIG.
Figures 4 and 4 are schematic configuration diagrams of specific devices implementing the present invention, Figures 5 and 6, respectively. FIG. 7 is an explanatory diagram illustrating the operation of the apparatus shown in FIG. 4, respectively. 2 is liquid, 3 is air pipe, 4.14 is pressurized gas, 5.8.15 is pressure gauge, 6.7, 16, 17, 18, 19, 20.23 is on-off valve, 9 is differential 11 is a service tank, 12 is a raw material liquid, and 13 is a pipe. Patent applicant Sumitomo Electric Industries Co., Ltd. Representative Patent attorney Shibu Mitsuishi (and 1 other person)
Claims (1)
送気管中の液を全て追い出した時の骸送気管内の圧力を
め、この圧力の値及び液の比重に基づいて送気管の下端
から液面までの高さを算出するとと全特徴とする液面高
さ測定方法。Calculate the pressure inside the bulk air pipe when all the liquid in the air pipe is expelled by force-feeding gas from the upper end of the air pipe inserted into the liquid, and adjust the air pipe based on this pressure value and the specific gravity of the liquid. A method for measuring liquid level that is characterized by calculating the height from the bottom of the liquid to the liquid level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6667084A JPS60210724A (en) | 1984-04-05 | 1984-04-05 | Measurement of liquid level height |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6667084A JPS60210724A (en) | 1984-04-05 | 1984-04-05 | Measurement of liquid level height |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60210724A true JPS60210724A (en) | 1985-10-23 |
Family
ID=13322569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6667084A Pending JPS60210724A (en) | 1984-04-05 | 1984-04-05 | Measurement of liquid level height |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60210724A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990013796A1 (en) * | 1989-05-03 | 1990-11-15 | Robert Bosch Gmbh | Container for liquids, with a hydrostatic liquid-level measurement device |
| US5052222A (en) * | 1990-11-05 | 1991-10-01 | Teledyne Exploration | Multiple-unit water depth sensor system |
| US5261276A (en) * | 1992-05-04 | 1993-11-16 | Henry Gifford | Fuel oil monitor system and method |
| US5347863A (en) * | 1993-07-02 | 1994-09-20 | Richard Clarence N | Asphalt oil tank monitor |
| US6510736B1 (en) | 2000-10-24 | 2003-01-28 | William J. Van Ee | Liquid depth sensing system |
| CN110303138A (en) * | 2019-08-16 | 2019-10-08 | 张培军 | Dual chamber, three Room holding furnace vapour-pressure types survey liquid level mechanism and method |
-
1984
- 1984-04-05 JP JP6667084A patent/JPS60210724A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990013796A1 (en) * | 1989-05-03 | 1990-11-15 | Robert Bosch Gmbh | Container for liquids, with a hydrostatic liquid-level measurement device |
| US5052222A (en) * | 1990-11-05 | 1991-10-01 | Teledyne Exploration | Multiple-unit water depth sensor system |
| US5261276A (en) * | 1992-05-04 | 1993-11-16 | Henry Gifford | Fuel oil monitor system and method |
| US5347863A (en) * | 1993-07-02 | 1994-09-20 | Richard Clarence N | Asphalt oil tank monitor |
| US6510736B1 (en) | 2000-10-24 | 2003-01-28 | William J. Van Ee | Liquid depth sensing system |
| CN110303138A (en) * | 2019-08-16 | 2019-10-08 | 张培军 | Dual chamber, three Room holding furnace vapour-pressure types survey liquid level mechanism and method |
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