JPH0628653U - Liquid level indicator - Google Patents
Liquid level indicatorInfo
- Publication number
- JPH0628653U JPH0628653U JP6167192U JP6167192U JPH0628653U JP H0628653 U JPH0628653 U JP H0628653U JP 6167192 U JP6167192 U JP 6167192U JP 6167192 U JP6167192 U JP 6167192U JP H0628653 U JPH0628653 U JP H0628653U
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- JP
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- Prior art keywords
- pipe
- liquid level
- liquid
- pressure
- gauge
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Abstract
(57)【要約】
【目的】 各種貯留槽に収容した液体の液面位置を測定
する液面計として、構造的に簡素で作動の信頼性に優
れ、且つ安価で既存の貯留槽にも容易に適用できるもの
を提供する。
【構成】 貯留槽（７）内に縦に配置させる下端開放型
の圧力発生パイプ（１）と、該パイプ（１）内の気圧を
測定する圧力計（５）と、該パイプ（１）内に気体を導
入する給気管（2c）とを具備してなる液面計。
(57) [Summary] [Purpose] As a liquid level gauge that measures the liquid level position of the liquid stored in various storage tanks, it is structurally simple, has excellent operational reliability, and is inexpensive and easy to use in existing storage tanks. Provide what is applicable to. [Structure] A lower end open type pressure generating pipe (1) vertically arranged in a storage tank (7), a pressure gauge (5) for measuring the atmospheric pressure in the pipe (1), and the inside of the pipe (1) A liquid level gauge comprising an air supply pipe (2c) for introducing gas into the.
Description
【０００１】[0001]
この考案は、液体用のタンクやコンテナー等の貯留槽における液面位置を計測 する液面計、とくに貯留槽内の液面位置から残存液量の検知に有用であるような 液面計に関する。 The present invention relates to a liquid level gauge that measures the liquid level position in a storage tank such as a liquid tank or container, and particularly to a liquid level gauge that is useful for detecting the amount of residual liquid from the liquid level position in the storage tank.
【０００２】[0002]
従来、貯留槽に収容した液体の液面位置を知る手段として、槽外に取り付けた 内部と連通するガラス管にて液面位置を目視する連通管方式、槽の側壁面に設け た覗き窓にて液面位置を目視する覗き窓方式、フロート式レベル計、静電容量計 、超音波計等を利用する方式、ロードセルを用いた重量測定方式等が採用されて いる。 Conventionally, as a means to know the liquid level position of the liquid stored in the storage tank, there is a communication pipe system that visually checks the liquid level position with a glass tube that is connected to the inside installed outside the tank, and a viewing window provided on the side wall surface of the tank. A sight window method for visually observing the liquid surface position, a float type level meter, a method using a capacitance meter, an ultrasonic meter, etc., a weight measuring method using a load cell, etc. are adopted.
【０００３】 しかるに、上記の連通管方式では、槽外に突出したガラス管が外部の作業や通 行を妨げる障害物になると共に、ガラス管が破損し易く、且つガラス管内面に汚 れが付着蓄積して視認性が悪くなるという問題がある。また覗き窓方式では、覗 き窓を設けるために貯留槽の強度が低下すると共に、窓取り付け部分からの液漏 れを生じ易いという欠点がある。更に、フロート式レベル計では、浮遊物や晶析 物による抵抗を受けたり、これらがフロート表面に付着することにより、フロー トの動作が安定せず不作動に陥る危険もあり、信頼性に乏しく、また設備的に高 く付くという難点があった。However, in the above communication tube system, the glass tube protruding outside the tank becomes an obstacle that obstructs external work and passage, the glass tube is easily damaged, and dirt adheres to the inner surface of the glass tube. There is a problem that it accumulates and the visibility deteriorates. In addition, the peep window method has the drawback that the strength of the storage tank is reduced due to the provision of the peep window and that liquid leakage from the window attachment portion is likely to occur. Furthermore, the float level meter is unreliable because there is a risk that the float operation may become unstable and become inoperable due to the resistance of floating substances and crystallized substances and the adhesion of these to the surface of the float. Also, there was a drawback that it was expensive in terms of equipment.
【０００４】 一方、静電容量計や超音波計を用いる方式では、計器が非常に高価であるため 、比較的小容量の貯留槽には経済的に適用しにくく、また作動機構部に電気を使 用するために設置場所の制約を受けるという問題があり、特に後者の超音波計で は発振部が破損し易い欠点もある。更にロードセルによる重量測定方式では、ロ ードセルが高価であり、特に１．０００ｋｇ以上になると非常に高く付くために 採用困難である。On the other hand, in the method using a capacitance meter or an ultrasonic meter, since the instrument is very expensive, it is difficult to apply economically to a storage tank having a relatively small capacity, and electricity is applied to the operating mechanism section. Since it is used, there is a problem that the installation location is restricted. Especially, in the latter ultrasonic meter, there is a drawback that the oscillation part is easily damaged. Furthermore, in the weight measurement method using a load cell, the load cell is expensive, and particularly when the load cell is 1.000 kg or more, it is very expensive and difficult to employ.
【０００５】 この考案は、上述の事情に鑑み、構造的に簡素で作動の信頼性に優れ、且つ安 価で既存の貯留槽にも容易に適用できる液面計を提供することを目的とする。The present invention has been made in view of the above circumstances, and an object thereof is to provide a liquid level gauge that is structurally simple, has excellent operation reliability, and is inexpensive and can be easily applied to an existing storage tank. .
【０００６】[0006]
上記目的を達成するために、この考案の請求項１に係る液面計は、貯留槽内に 縦に配置させる下端開放型の圧力発生パイプと、該パイプ内の気圧を測定する圧 力計と、該パイプ内に気体を導入する給気管とを具備してなる構成を採用したも のである。 In order to achieve the above object, a liquid level gauge according to claim 1 of the present invention comprises a lower end open type pressure generating pipe vertically arranged in a storage tank, and a pressure gauge for measuring atmospheric pressure in the pipe. A configuration including an air supply pipe for introducing gas into the pipe is adopted.
【０００７】 同様に請求項２に係る液面計は、上記請求項１における圧力発生パイプと圧力 計を結ぶ通気管路に給気管が流路切換弁を介して接続されてなる構成を採用した ものである。Similarly, the liquid level gauge according to claim 2 employs a configuration in which an air supply pipe is connected to a ventilation pipe connecting the pressure generating pipe and the pressure gauge according to claim 1 through a flow path switching valve. It is a thing.
【０００８】 更に請求項３に係る液面計は、上記請求項１又は２における圧力発生パイプ内 に温度センサーが設けられてなる構成を採用したものである。Further, the liquid level gauge according to claim 3 employs a structure in which a temperature sensor is provided in the pressure generating pipe according to claim 1 or 2.
【０００９】[0009]
下端を開放したパイプを気体が充満した状態で液中に垂直に突き入れた場合、 液体のパイプ下端を基準とした位置水頭分だけパイプ内の気体が圧縮され、この 状態で液面位置が変動すれば、この変動に比例してパイプ内の気圧が変化する。 この考案の液面計は、この原理を利用し、下端開放状態で貯留槽内に垂直配置さ せた圧力発生パイプ内の気圧を測定し、この測定値より液面位置を算出するもの である。 When a pipe with an open lower end is pushed vertically into the liquid while it is filled with gas, the gas in the pipe is compressed by the position head of the liquid, and the liquid surface position fluctuates in this condition. Then, the air pressure in the pipe changes in proportion to this fluctuation. Utilizing this principle, the liquid level gauge of the present invention measures the atmospheric pressure in the pressure generating pipe vertically arranged in the storage tank with the lower end open, and calculates the liquid level position from this measured value. .
【００１０】 圧力発生パイプは開放した下端が貯留槽の底部近傍に達するように垂直に設置 するが、貯留槽が空の状態では該パイプ内の圧力は槽内の気圧と同一（通常は１ 気圧）となり、この気圧において圧力計は液面高さを零とする指示値つまり零点 を示すように設定される。しかして、槽内に液体を導入し、その液面高さが開放 したパイプ下端を越えると、その水頭圧によりパイプ内の気圧が上昇し、これが 圧力計にて測定され、液面高さに換算して指示される。なお、圧力変化は液体の 比重によって異なるため、液体の比重に応じて予め圧力値と液面高さとの関係を 求めておく。液面位置は、圧力計自体の表示銘板に液面高さの目盛りを設けて直 接指示するようにしてもよいし、圧力計からの検知信号により演算装置を介して 算出した値を専用の表示器で表示するものとしてもよい。また、貯留槽の形状・ 寸法が既知であれば当然に該液面位置より液量を算出できるから、この液量につ いても同様に表示することが可能である。The pressure generating pipe is installed vertically so that the open lower end reaches the vicinity of the bottom of the storage tank. ), The pressure gauge is set to indicate the zero point, which is the indicated value for zero liquid level at this atmospheric pressure. Then, when the liquid is introduced into the tank and the liquid level rises above the open lower end of the pipe, the pressure in the pipe rises due to the head pressure, which is measured by a pressure gauge and measured at the liquid level. Converted and instructed. Since the pressure change varies depending on the specific gravity of the liquid, the relationship between the pressure value and the liquid surface height is calculated in advance according to the specific gravity of the liquid. The position of the liquid level may be directly indicated by providing a scale of the liquid level on the display nameplate of the pressure gauge itself, or a value calculated via the arithmetic unit by the detection signal from the pressure gauge may be used for exclusive use. It may be displayed on a display. Further, if the shape and dimensions of the storage tank are known, the liquid amount can be calculated from the liquid surface position, so that the liquid amount can be similarly displayed.
【００１１】 ところで、液面計を既存の貯留槽に装備する際、一般的には圧力発生パイプを 槽内に取り付け、その上端部と槽外の圧力計とをチューブ等で接続することにな るが、槽内にパイプの下端位置を越える液体が存在している場合、取り付けた時 点でパイプ内に液体が侵入し、その液面が槽内と同一高さになる。従って、圧力 発生パイプと圧力計のみより構成される液面計では、両者を接続した際に取り付 け時の液面高さが零と認識されるという不都合を生じるから、パイプと圧力計を 予め密封接続した状態で取り付けるか、もしくは液体を抜き出して槽内を空にし た上で取り付ける必要があるが、前者の方法は実際の作業上では極めて困難であ り、また後者の方法でも液体の移し替え操作に多大な手間を要すると共に、液体 の種類によっては変質や汚染を避けるために抜き出し分の廃棄を余儀なくされる こともある。By the way, when a liquid level gauge is installed in an existing storage tank, it is generally necessary to attach a pressure generating pipe inside the tank and connect the upper end of the pressure generating pipe and the pressure gauge outside the tank with a tube or the like. However, if there is liquid that exceeds the lower end position of the pipe in the tank, the liquid will enter the pipe at the time of attachment and the liquid level will be at the same level as in the tank. Therefore, with a liquid level gauge consisting only of a pressure generating pipe and a pressure gauge, there is the inconvenience that the liquid level height at the time of mounting will be recognized as zero when both are connected. Although it is necessary to install the device in a sealed connection in advance or to evacuate the liquid inside the tank to install it, the former method is extremely difficult in actual work, and the latter method also requires liquid The transfer operation requires a great deal of work, and depending on the type of liquid, it may be necessary to discard the withdrawn portion in order to avoid alteration or contamination.
【００１２】 しかるに、この考案の液面計では、貯留槽内に液体が存在する状態で圧力発生 パイプを取り付けた際、同様にパイプ内に液体が侵入して槽内と同じ液面高さと なるが、次いで圧力計及び給気管を接続したのち、給気管よりパイプ内に気体を 導入して該パイプ内の液体を追い出すことができる。従って圧力計との管路を閉 止した状態でパイプ内の液体を追い出したのち、給気管からの気体の導入を停止 し、圧力計との管路を開放すれば、槽内の液面高さに対応する圧力値が検出され ることになる。この圧力値は槽内が空である液面高さ零の場合を基準とした値と なる。However, in the liquid level gauge of the present invention, when the pressure generating pipe is attached in the state where the liquid is present in the storage tank, the liquid similarly enters the pipe and the liquid level becomes the same as that in the tank. However, after connecting the pressure gauge and the air supply pipe, gas can be introduced into the pipe from the air supply pipe to expel the liquid in the pipe. Therefore, if the liquid in the pipe is expelled while the pipe with the pressure gauge is closed, the introduction of gas from the air supply pipe is stopped and the pipe with the pressure gauge is opened, the liquid level in the tank rises. The pressure value corresponding to that will be detected. This pressure value is based on the case where the tank is empty and the liquid level is zero.
【００１３】 給気管は圧力発生パイプに直接接続してもよいが、該パイプと圧力計を結ぶ通 気管路に流路切換弁を介して接続すれば、上記の取り付け初期における通気切換 えの操作が容易になると共に、給気管路と上記通気管路とに個別に開閉弁を設け る必要がなく、液面計の全体構成が簡素になる。また圧力発生パイプ内に温度セ ンサーを設けることにより、槽内の温度計側や温度制御のための検温部を液面計 に一体化できる。The air supply pipe may be directly connected to the pressure generating pipe, but if the air supply pipe is connected to the air passage connecting the pipe and the pressure gauge via the flow path switching valve, the ventilation switching operation at the initial stage of the installation described above. In addition, it is not necessary to separately provide an opening / closing valve for the air supply line and the ventilation line, and the overall structure of the liquid level gauge is simplified. In addition, by providing a temperature sensor in the pressure generation pipe, the thermometer side in the tank and the temperature detection part for temperature control can be integrated with the liquid level gauge.
【００１４】[0014]
図１はこの考案に係る液面計の一実施例を示す。図において、（１）は圧力発 生パイプであり、下端が開放すると共に、上端には通気チューブ（2a）を接続し た封止キャップ（1a）が嵌着され、外周面には液面レベルを示す目盛り（３）が 設けられている。そして、通気チューブ（2a）の他端には三方コック（４）を介 して、圧力計（５）に連絡する測定チューブ（2b）と、エアポンプ（６）に連絡 する給気チューブ（2c）とが分岐状に接続されており、該三方コック（４）の切 換操作により両チューブ（2b）（2c）の一方がパイプ（１）内と連通するように なっている。 FIG. 1 shows an embodiment of a liquid level gauge according to the present invention. In the figure, (1) is a pressure generating pipe, the lower end is open, the sealing cap (1a) connected to the ventilation tube (2a) is fitted on the upper end, and the liquid level on the outer peripheral surface. Is provided with a scale (3). Then, at the other end of the ventilation tube (2a), a measurement tube (2b) communicating with the pressure gauge (5) and an air supply tube (2c) communicating with the air pump (6) via the three-way cock (4). Are connected in a branched manner, and one of both tubes (2b) (2c) communicates with the inside of the pipe (1) by switching the three-way cock (4).
【００１５】 図２は上記の液面計をタンク（７）に取り付けた状態を示す。タンク（７）は 、略円筒形で基枠（８）に支持されており、天井部に蓋付き投入口（7a）を備え ると共に、底部に導出口（7b）を有している。そして、圧力測定パイプ（１）は 、開放した下端が該タンク（７）内の底部に近接して、且つ封止した上端部が該 タンク（７）の上方外部に突出するように、垂直状態に設置されている。また、 圧力計（５）はタンク（７）の外部側面に、エアポンプ（６）は基枠（８）の上 面に、それぞれ取り付けられている。この液面計の取り付けにおいては、圧力発 生パイプ（１）と圧力計（５）及びエアポンプ（６）を分離した状態で個別に所 要部位に固定した上で、格チューブ（2a）〜（2c）及び三方コック（４）を接続 するが、タンク（７）内に液体が残存していても差し支えない。FIG. 2 shows a state in which the above liquid level gauge is attached to the tank (7). The tank (7) has a substantially cylindrical shape and is supported by the base frame (8). The tank (7) has a lid-equipped inlet (7a) and a bottom provided with an outlet (7b). The pressure measuring pipe (1) is in a vertical state such that the open lower end is close to the bottom in the tank (7) and the sealed upper end is projected above and outside the tank (7). It is installed in. The pressure gauge (5) is attached to the outer side surface of the tank (7), and the air pump (6) is attached to the upper surface of the base frame (8). When installing the liquid level gauge, fix the pressure generating pipe (1), the pressure gauge (5) and the air pump (6) individually in the separated state, and then attach the level tubes (2a) to (). 2c) and the three-way cock (4) are connected, but there is no problem even if liquid remains in the tank (7).
【００１６】 すなわち、タンク（７）内に液体が残存する場合、圧力発生パイプ（１）を上 端が開放した状態で取り付けると、図３に示すように該パイプ（１）の内部に液 体（９）が入り込んでパイプ外と同じ液面高さとなるが、各構成部材を接続後に 三方コック（４）の操作により給気チューブ（2c）をパイプ（１）内と連通させ 、図４に示すようなエアポンプ（６）より空気を送り込むことによってパイプ（ １）内の液体（９）を追い出すことができる。かくしてパイプ（１）内から完全 に液体（９）を追い出したのち、三方コック（４）の操作により給気チューブ（ 2c）を遮断して測定チューブ（2b）をパイプ（１）内と連通させることにより、 該パイプ（１）内の気圧が圧力計（５）によって測定される。このとき、パイプ （１）内の空気には該パイプ（１）の下端位置からタンク内の液面まで液体（９ ）の位置水頭（ｈ）（図４参照）の圧力が加わっているから、測定される圧力値 はタンク（７）が空である場合の圧力（１気圧）を基準の零点とした値となる。 従って、取付時のタンク（７）内に液体（９）が残存することによって圧力基準 地に狂いを生じるという問題は解消される。That is, when the liquid remains in the tank (7), if the pressure generating pipe (1) is attached with the upper end opened, the liquid inside the pipe (1) as shown in FIG. Although (9) enters and the liquid level is the same as the outside of the pipe, after connecting each component, the air supply tube (2c) is made to communicate with the inside of the pipe (1) by operating the three-way cock (4). The liquid (9) in the pipe (1) can be expelled by sending air from the air pump (6) as shown. Thus, the liquid (9) is completely expelled from the inside of the pipe (1), and then the air supply tube (2c) is shut off by operating the three-way cock (4) so that the measuring tube (2b) communicates with the inside of the pipe (1). Thereby, the atmospheric pressure in the pipe (1) is measured by the pressure gauge (5). At this time, the pressure in the head (h) of the liquid (9) (see FIG. 4) is applied to the air in the pipe (1) from the lower end position of the pipe (1) to the liquid level in the tank. The measured pressure value is a value with the pressure (1 atm) when the tank (7) is empty as a reference zero point. Therefore, the problem that the pressure reference area is deviated due to the liquid (9) remaining in the tank (7) at the time of mounting is solved.
【００１７】 しかして、圧力計（５）によって測定される圧力値はパイプ（１）の下端位置 を基準（高さ零）とした液面高さに比例して変動するから、液体（９）の比重に 基づいて該圧力値から液面位置を簡単に算出できる。この液面位置は、圧力計（ ５）の表示銘板に液面高さの目盛りを設けて、直接に読み取るように構成できる 。また、タンク（７）で取り扱う液体（９）の種類が多い場合は、圧力計（５） の測定値を電気信号に変換し、適当な演算装置により液面高さに換算して自動的 にデジタル表示させることが可能である。更にタンク（７）の形状・寸法と検出 した液面位置より液量を算出でき、この液量についても同様に表示可能である。 その他、圧力計（５）として電気接点付き液体投入用ポンプのオン・オフ制御等 の自動化を行うように構成できる。Since the pressure value measured by the pressure gauge (5) fluctuates in proportion to the liquid level height with the lower end position of the pipe (1) as a reference (zero height), the liquid (9) The liquid surface position can be easily calculated from the pressure value based on the specific gravity of This liquid level position can be configured to be directly read by providing a scale for the liquid level on the display nameplate of the pressure gauge (5). When there are many kinds of liquid (9) handled in the tank (7), the measured value of the pressure gauge (5) is converted into an electric signal, which is automatically converted into the liquid level by an appropriate arithmetic device. It can be displayed digitally. Further, the liquid amount can be calculated from the shape and size of the tank (7) and the detected liquid surface position, and this liquid amount can be similarly displayed. In addition, the pressure gauge (5) can be configured to automate the on / off control of the liquid charging pump with electric contacts.
【００１８】 なお、上記実施例の構成では、圧力発生パイプ（１）に液面レベルを示す目盛 り（３）を設けているため、万一測定機構等に故障を生じた場合でも、該パイプ （１）をタンク（７）から抜出し、目視にて濡れの最高位の目盛り（３）を読む ことにより液面位置を知ることができる。In the configuration of the above embodiment, since the pressure generating pipe (1) is provided with the scale (3) indicating the liquid surface level, even if a failure occurs in the measuring mechanism or the like, the pipe is not affected. The liquid level can be known by pulling out (1) from the tank (7) and visually reading the scale (3) at the highest level of wetting.
【００１９】 また図５に示すように、上記液面計の圧力発生パイプ（１）内に、温度表示器 や温度調節装置に接続する温度センサー（10）を挿入することにより、上記液面 計を本来の液面位置の測定と液温測定に兼用できる。Further, as shown in FIG. 5, by inserting a temperature sensor (10) connected to a temperature indicator or a temperature adjusting device into the pressure generation pipe (1) of the liquid level gauge, the liquid level gauge Can be used for both the original liquid surface position measurement and the liquid temperature measurement.
【００２０】 この考案の液面形で測定対象とする液体は、常温での揮発性の低い液体であれ ばよく、例えば、醤油やだしの如き調味液類、糖液、ジュースの如き飲料類、ク リーム類、液卵、液状油脂類等の食品関係の液体、ラテックス、液状界面活性剤 、水性塗料等の化学関係の液剤の他、液状の医薬品や化粧品等も挙げられる。し かして、食品関係の液剤では接液部をサニタリー仕様する必要があるため、圧力 発生パイプ（１）には、ステンレス鋼やフッ素系樹脂のコーティングを施した金 属材料、フッ素系樹脂等を用いることが望ましい。また酸化を嫌う液体について は、タンク等の貯留槽内の雰囲気ならびに圧力発生パイプに導入する気体として 、上記実施例の空気に代えて窒素ガス等の不活性ガスが使用される。The liquid to be measured in the liquid surface type of the present invention may be a liquid having low volatility at room temperature, for example, seasoning liquids such as soy sauce and soup, beverages such as sugar liquid and juice, Examples include food-related liquids such as creams, liquid eggs, and liquid oils and fats, liquids related to chemicals such as latex, liquid surfactants, and water-based paints, as well as liquid pharmaceuticals and cosmetics. However, for liquids related to food products, it is necessary to sanitize the wetted parts. Therefore, the pressure generating pipe (1) is made of stainless steel or metal material coated with fluorine resin, fluorine resin, etc. Is preferred. For liquids that are not susceptible to oxidation, an inert gas such as nitrogen gas is used as the gas introduced into the atmosphere in the storage tank such as the tank and the pressure generating pipe, instead of the air in the above embodiment.
【００２１】 上記実施例では圧力発生パイプ（１）に対する給気チューブ（2c）と測定チュ ーブ（2b）の流路切換えに三方コックを用いているが、他の種々の流路切換弁を 使用できる。また、給気チューブ（2c）の如き給気管は、圧力計（５）に連絡す る管路とは分離して、開閉弁を介して圧力発生パイプ（１）に直接に接続する構 成としてもよい。ただし、この分離した管路とする場合、圧力発生パイプに対す る通気の切換えを行うために圧力計測の管路にも開閉弁を設ける必要がある。さ らに、この考案の液面計は、例示したようにタンクに限らず、液体用コンテナそ の他の種々の貯留槽の液面位置測定に利用できる。In the above-mentioned embodiment, the three-way cock is used for switching the flow passage between the air supply tube (2c) and the measurement tube (2b) for the pressure generating pipe (1), but various other flow passage switching valves may be used. Can be used. In addition, the air supply pipe such as the air supply tube (2c) is separated from the line connecting to the pressure gauge (5) and directly connected to the pressure generation pipe (1) through an on-off valve. Good. However, if this separate pipeline is used, it is necessary to provide an on-off valve also in the pressure measurement pipeline in order to switch the ventilation for the pressure generation pipe. Further, the liquid level gauge of the present invention is not limited to the tank as illustrated, but can be used for measuring the liquid level position of various storage tanks such as a liquid container.
【００２２】 請求項１の考案によれば、各種貯留槽に収容した液体の液面位置に測定する液 面計として、装置構成が極めて簡素で安価に製作でき、故障を生じにくく作動安 定性に優れると共に測定値の信頼性が高く、しかも既存の貯留槽にも取り付け可 能である上、その取り付けに際して貯留槽内に液体が残存する場合でも、該液体 を抜出する必要がなく高い測定精度を確保でき、また電気を使用しないために設 置場所の制約を受けないという、非常に実用性に優れるものが提供される。According to the invention of claim 1, as a liquid level gauge for measuring the liquid level position of the liquid stored in various storage tanks, the device configuration is extremely simple and can be manufactured at low cost, and it is hard to cause a failure and has stable operation. It is excellent and has high reliability of measured values, and it can be attached to existing storage tanks, and even if liquid remains in the storage tank at the time of installation, there is no need to extract the liquid and high measurement accuracy. It is possible to secure the electric power consumption, and because it does not use electricity, there is no restriction on the place of installation, which is very practical.
【００２３】 請求項２の考案によれば、上記液面計として、特に液体が残存する貯留槽への 取り付けにおいて、取り付け後に必要な圧力発生パイプに対する通気の切換え操 作が容易であると共に、全体としての通気管路構成が簡素であり取付作業性に優 れるものが提供される。According to the second aspect of the present invention, as the liquid level gauge, particularly when the liquid level gauge is installed in a storage tank in which liquid remains, it is easy to perform ventilation switching operation for the pressure generating pipe required after installation, and As a result, the structure of the ventilation pipe is simple and the installation workability is excellent.
【００２４】 請求項３の考案によれば、上記液面計の圧力発生パイプを利用して液温を測定 することが可能であり、液温の管理や調節を行う貯留槽において液面計と別個に 温度センサーの取り付けを行う必要がなく、施工容易となる。According to the invention of claim 3, it is possible to measure the liquid temperature by using the pressure generating pipe of the liquid level gauge, and the liquid level gauge is used in the storage tank for managing and adjusting the liquid temperature. There is no need to install a temperature sensor separately, which facilitates construction.
【図１】この考案に係る第一実施例の液面計の正面図で
ある。FIG. 1 is a front view of a liquid level gauge of a first embodiment according to the present invention.
【図２】同液面計を取り付けたタンクの一部破断正面図
である。FIG. 2 is a partially cutaway front view of a tank equipped with the liquid level gauge.
【図３】同液面計のタンクへの取り付け手順を示す概略
縦断面図である。FIG. 3 is a schematic vertical sectional view showing a procedure for attaching the liquid level gauge to a tank.
【図４】同取り付け後の操作を示す概略縦断面図であ
る。FIG. 4 is a schematic vertical sectional view showing an operation after the attachment.
【図５】第二実施例の液面計における圧力発生パイプの
縦断面図である。FIG. 5 is a vertical cross-sectional view of a pressure generation pipe in the liquid level gauge of the second embodiment.
１…圧力発生パイプ ２ａ…通気チューブ ２ｂ…測定チューブ（圧力計測の管路） ２ｃ…給気チューブ（給気管） ４…三方コック（流路切換弁） ５…圧力計 ６…エアポンプ ７…タンク（貯留槽） ９…液体 １０…温度センサー 1 ... Pressure generating pipe 2a ... Ventilation tube 2b ... Measuring tube (pressure measurement conduit) 2c ... Air supply tube (air supply pipe) 4 ... Three-way cock (flow path switching valve) 5 ... Pressure gauge 6 ... Air pump 7 ... Tank ( Storage tank) 9 ... Liquid 10 ... Temperature sensor
Claims (3)
圧力発生パイプと、該パイプ内の気圧を測定する圧力計
と、該パイプ内に気体を導入する給気管とを具備してな
る液面計。1. A pressure generating pipe having an open lower end which is vertically arranged in a storage tank, a pressure gauge for measuring an atmospheric pressure in the pipe, and an air supply pipe for introducing gas into the pipe. Liquid level indicator.
に給気管が流路切換弁を介して接続されてなる請求項１
記載の液面計。2. An air supply pipe is connected to a ventilation pipe connecting the pressure generating pipe and the pressure gauge via a flow path switching valve.
Liquid level gauge described.
られてなる請求項１又は２記載の液面計。考案の詳細な
説明3. The liquid level gauge according to claim 1, wherein a temperature sensor is provided in the pressure generating pipe. Detailed explanation of the device
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6167192U JPH0628653U (en) | 1992-09-01 | 1992-09-01 | Liquid level indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6167192U JPH0628653U (en) | 1992-09-01 | 1992-09-01 | Liquid level indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0628653U true JPH0628653U (en) | 1994-04-15 |
Family
ID=13177939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6167192U Pending JPH0628653U (en) | 1992-09-01 | 1992-09-01 | Liquid level indicator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0628653U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013125008A (en) * | 2011-12-16 | 2013-06-24 | Yazaki Corp | Diaphragm body, differential pressure measurement unit, liquid amount estimation device, and liquid amount estimation system |
| CN108645609A (en) * | 2018-06-12 | 2018-10-12 | 滨州渤海活塞有限公司 | Piston circlip assembling detection device and its detection method |
-
1992
- 1992-09-01 JP JP6167192U patent/JPH0628653U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013125008A (en) * | 2011-12-16 | 2013-06-24 | Yazaki Corp | Diaphragm body, differential pressure measurement unit, liquid amount estimation device, and liquid amount estimation system |
| CN108645609A (en) * | 2018-06-12 | 2018-10-12 | 滨州渤海活塞有限公司 | Piston circlip assembling detection device and its detection method |
| CN108645609B (en) * | 2018-06-12 | 2023-07-11 | 滨州渤海活塞有限公司 | Piston clamp spring assembly detection device and detection method thereof |
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