JPS5970917A - Method and apparatus for measuring liquid depth in tank - Google Patents

Abstract

PURPOSE:To attain working safety, by a method wherein nitrogen is sent into a box body provided with an orifice to make the pressure in the box body higher than the gas pressure in a tank and, in this state, a measure tape is suspended through the orifice. CONSTITUTION:A box body 1 is placed, connected and secured to the measure orifice 28 of a tank 27 and nitrogen is sent into the box body 1 from a nitrogen introducing port 13 to ascertain that oxygen concn. reaches 5% or less. Subsesequently, a nitrogen exhaust port 26 is closed and the pressure in the box body 1 is made higher than that in the tank 27 by sending nitrogen into said box body 1. In this state, the valve 32 of the measure orifice 28 of the tank 27 is opened and, succeedingly, the lid frame 17 of a measure tape storing part 2 to confirm that the gas flowed out into the air is safe. A measure tape 22 stored in the measure tape storing part 2 is held by the hand and brought down into the tank 27. When the wt. 24 provided to the leading end of the tape is contacted with the bottom surface of the tank 27, the measure tape 22 is drawn up and the graduation of a position changed upon contact with a liquid is read to measure the depth.

Description

【発明の詳細な説明】 この発明はタンクに貯蔵せる液体の量を計測する方法及
びその装置に関し、詳しくは人体に危険なガス、公害或
いは爆発等の惧れあるガスを発生する液体を貯蔵せる夕
／りに使用する計測方法及び装置に関する。[Detailed Description of the Invention] The present invention relates to a method and device for measuring the amount of liquid stored in a tank, and more specifically, to a method and device for measuring the amount of liquid stored in a tank, and more specifically, for storing liquids that generate gases that are dangerous to the human body, that pose a risk of pollution, or of explosion. This invention relates to a measuring method and device used in the evening/afternoon.

一般にタンク内に貯蔵された液体の量を計測するには、
タンク内面積に液面からタンク底面までの深さを乗じる
ことによって容量を求める方法が採用されている。そし
て、タンク内に貯蔵された液体の深さは、錘の付いた検
尺テ゛−ブをタンク内に垂らし、液体に触れて漏れたテ
ープの目盛を読み取るか、或いは検尺テープに薬液を塗
布し、その薬液が液体に触れることによって変色した最
上位置の目盛を読み取ることによシ計測する方法がとら
れておシ、この方法が、最も正確とされている。Generally, to measure the amount of liquid stored in a tank,
The method used is to calculate the capacity by multiplying the internal area of the tank by the depth from the liquid level to the bottom of the tank. The depth of the liquid stored in the tank can be determined by dropping a measuring tape with a weight into the tank, touching the liquid and reading the scale on the leaking tape, or by applying a chemical solution to the measuring tape. However, the measurement is performed by reading the scale at the top position, which changes color when the chemical solution comes into contact with the liquid, and this method is considered to be the most accurate.

ところが、上記した方法はタンク内の圧力が大気圧と同
じか或いは大気圧以下である場合は何等問題ないが、タ
ンク内の圧力が大気圧以上となった場合は検尺孔よ乃タ
ンク内のガスが吹き出して人体に対する危険、公害、爆
発等の生態が発生するため、検尺テープを使用しての深
さ測定は不可能となっている。However, there is no problem with the above method if the pressure inside the tank is the same as atmospheric pressure or below atmospheric pressure, but if the pressure inside the tank exceeds atmospheric pressure, the measurement hole inside the tank Depth measurement using a measuring tape is no longer possible because the gas blows out and poses danger to humans, pollution, and explosions.

そこで、不発８ｔｌ　ｉＪ：上述の如き事情に鑑みてな
されたもので、タンクに設けられた検尺孔の上部にオリ
アイスを介して連通ずる気密性の圧力室を設け、その圧
力室内の圧力をタンク内のガス圧力よシも高くしてガス
の吹き出しを防ぎ、その状態下でメリフィスを通して検
尺孔よシタンク内部に検尺テープを下ろし、計測するよ
うにし、それによシ安全に計測作業を行なうことが出来
るようにした計測方法及びその装置を提供するものであ
る。Therefore, the unexploded 8tl iJ was created in view of the above-mentioned circumstances, and an airtight pressure chamber was installed above the measuring hole provided in the tank and communicated with it via an oriice, and the pressure inside the pressure chamber was transferred to the tank. Increase the gas pressure inside the tank to prevent gas from blowing out, and under that condition, lower the measuring tape through the merifice into the measuring hole and inside the tank to take measurements, thereby safely performing measurement work. The purpose of the present invention is to provide a measurement method and device that enable the measurement.

本発明に係る方法及び装置で使用される箱体内の圧力を
高める気体としては窒素を用い、しかもその窒素は少量
で高い圧力を得られるように箱体内部をオリフィスを設
けた仕切板で縦方向に複数の室に区画し、ラビリンス効
果を効率良く利用している。Nitrogen is used as the gas to increase the pressure inside the box used in the method and apparatus of the present invention, and in order to obtain high pressure with a small amount of nitrogen, the inside of the box is partitioned vertically with a partition plate provided with an orifice. It is divided into multiple chambers to efficiently utilize the labyrinth effect.

又、箱体内部の圧力は同じ量の蟹素を使用した場合、箱
体内部に区画された室数の多い方が高い圧力を得ること
が出来る。従って、計測しようとするタンクのガス圧が
高い場合は、箱体内の仕切板数を増やして室数を増加す
ることによシ対処し得るものである。Further, when using the same amount of crab meat, the pressure inside the box can be higher if the number of compartments inside the box is larger. Therefore, if the gas pressure in the tank to be measured is high, this can be handled by increasing the number of partition plates in the box to increase the number of chambers.

以下、本発明の一実施例を図面に基づいて説明すると、
（１）は箱体、（２）は検尺テープ保管部、（３）は錘
格納部である。Hereinafter, one embodiment of the present invention will be described based on the drawings.
(1) is a box body, (2) is a measuring tape storage area, and (3) is a weight storage area.

箱体（すは金属板によって有底筒状に形成されその上端
部外側にドーナツ状を呈した取付板（４）が嵌合固着さ
れると共に、箱体の上面開口部は天板（５）を前記取付
板（４）にボルト止め（６）シて閉鎖されている。The box body is formed into a cylindrical shape with a bottom by a metal plate, and a donut-shaped mounting plate (4) is fitted and fixed on the outside of the upper end thereof, and the top opening of the box body is connected to a top plate (5). is closed by bolting (6) to the mounting plate (4).

又、箱体（り内部は緊密に嵌合する間隔保持筒（７）と
仕切板（８）とによって縦方向に３つの室（９）。Also, the inside of the box has three chambers (9) in the vertical direction by a spacer cylinder (7) and a partition plate (8) that fit tightly together.

（９’）　、　（９７’に区画形成されると共に、箱体
（１）の底板（１５，天板（５）及び仕切板（８）には
夫々通孔αＱが同一線上に位置して開設され、それら各
通孔００の一側面にオリフィス（１１を開穿したオリイ
フス板（１１）がネジ止め固定されている。(9') and (97'), and the bottom plate (15), top plate (5), and partition plate (8) of the box body (1) have through holes αQ located on the same line. An orifice plate (11) in which an orifice (11) is bored is fixed to one side of each of the through holes 00 with screws.

連通ずる窒素導入口０３が設けられ、窒素供給用切板（
８）には夫々取手ＯＱ、＜１・が固着され、本案装置の
組立時における保持筒（７）、仕切板（８）の取り扱い
を簡便に行なうことが出来るようになってトな面の接合
で積み重ねてもよいが、仕切板（８）に形成せるオリフ
ィス（６）を同じ向きにして配置することは非常に困難
なことである。。A communicating nitrogen inlet 03 is provided, and a nitrogen supply cutting plate (
8) are fixed with handles OQ and <1, respectively, making it possible to easily handle the holding cylinder (7) and partition plate (8) when assembling the proposed device. However, it is very difficult to arrange the orifices (6) formed in the partition plate (8) in the same direction. .

そのため、間隔保持筒（７）の上下面及び仕切板（８）
には図示せるような凹部−，凸部０ηを形成しこれらを
噛み合わせて接合することにより仕切板（８）の位１１
決めを而単に行なうことが出来るものである。Therefore, the upper and lower surfaces of the spacing cylinder (7) and the partition plate (8)
By forming a concave part and a convex part 0η as shown in the figure, and joining these by meshing, the partition plate (8) is formed at position 11.
Decisions can be made easily.

検尺テープ保管部（２）は、箱体（１）の上端周縁に固
θ７１はその一側を取伺板（４）に対し軸受０呻と軸（
至）とで回動可能に取＋ＩＩＩ′ｊられると共に、不使
用時は気密性を維持すべくパツキン（ホ）を介在し、ボ
ルト・ナラ）Ｈで緊密に締着されている。The measuring tape storage part (2) is fixed to the upper edge of the box body (1).
It is rotatably mounted between (to) and +III'j, and is tightly fastened with bolts and nuts (h) with a gasket (h) interposed to maintain airtightness when not in use.

又、検尺テープ保管部（２）内の天板（５）上面には検
尺テープ器（イ）を係止保持する受は枠（ホ）が取付け
られている。Further, a frame (E) is attached to the upper surface of the top plate (5) in the measuring tape storage section (2) for retaining the measuring tape device (A).

錘格納部（３）は検尺テープ器に）の検尺テープ（イ）
′先端に連結された錘（ハ）の外径よりも大径の筒によ
って形成され、その筒の上端は箱体（１）の底板（１５
下面に固着されると共に、筒の下端外周には接続フラン
ジに）が固着されている。The weight storage part (3) is the measuring tape (a) of the measuring tape device)
'It is formed by a cylinder with a larger diameter than the outer diameter of the weight (C) connected to the tip, and the upper end of the cylinder is connected to the bottom plate (15) of the box body (1).
It is fixed to the lower surface, and a connecting flange) is fixed to the outer periphery of the lower end of the cylinder.

又、錘格納部（３）の周壁には窒素排出口（ハ）が設け
られている。Further, a nitrogen outlet (c) is provided on the peripheral wall of the weight storage portion (3).

前記した通孔θ１とオリフィスａ埠との関係は第６図乃
至第８図に示す如く、通孔ａ１は検尺テープげの厚さに
対しかな殴大きめの孔に形成されると共に、幅方向の両
側には検尺テープ■カ両側が嵌合し案内される案内部（
Ｊ１′が連設され、オリフィスＦｇ０１）に開設せるオ
リフィス（ロ）は通孔α０を絞るべく案内部θｑよシ稍
々大きい平面矩形状に開穿されている〇 又、オリフィス板θカは絞シ効果を高めるべくその板厚
を薄くしている。The relationship between the above-described through hole θ1 and the orifice a is as shown in FIGS. There is a measuring tape on both sides of the
J1' is connected to the orifice Fg01), and the orifice (b) opened in the orifice Fg01) is opened in a planar rectangular shape that is slightly larger than the guide part θq in order to narrow the through hole α0. The thickness of the plate is made thinner to enhance the effect.

図中、に）はタンク、例は検尺孔である。In the figure, ( ) is a tank, and the example is a measuring hole.

次に、上記した装置の使用について説明する。Next, the use of the above-described device will be explained.

■　タンク■の検尺孔に）に本装置を載置し、錘格納部
（３）下端に設けた接続７ランジ員を検尺孔に）の７ラ
ンジにボルト・ナツトによって接続固定する。■ Place this device in the measuring hole of the tank ■), and connect and fix the connection 7 lunge member provided at the lower end of the weight storage part (3) to the measuring hole) with bolts and nuts.

■　箱体（すに取付けられた窒素導入口（２）に窒素供
給用の管０４を接続して、窒素を送シ込み窒素排出口（
ハ）で酸素の濃度を測定し、酸素濃度が５％以下になっ
ていることを確認する０これは火災の発生を防止するた
めに行なう（■　酸素濃度が５％以下になったことを確
認した後、窒素排出口（ハ）を閉じ、窒素導入口（２）
よシ箱体（１）内に窒素を送シ窒素導入口０３に取付け
である圧力計（図示セズ）にて箱体（１）内の圧力をタ
ンク（ロ）内の圧力よシも高くする。■ Connect the nitrogen supply pipe 04 to the nitrogen inlet (2) attached to the box body (seat) to supply nitrogen and discharge the nitrogen to the nitrogen outlet (2).
c) Measure the oxygen concentration and confirm that the oxygen concentration is below 5%.0 This is done to prevent the occurrence of a fire (■ Confirm that the oxygen concentration is below 5%) After that, close the nitrogen outlet (c) and close the nitrogen inlet (2).
Send nitrogen into the box (1) and increase the pressure inside the box (1) to the same level as the pressure inside the tank (B) using the pressure gauge (shown in the figure) attached to the nitrogen inlet 03. .

■　タンク（イ）の検尺孔（ハ）のバルブ０′４を開く
。■ Open valve 0'4 of the measuring hole (c) of the tank (a).

■　検尺テープ保管部（２）の張枠ａ′／）を開け、天
板（５）に形成せるオリフィスθａから大気中に流出す
るガスを検査し、タンク内で発生したガスの含有量を調
べ、大気中に流出せるガスが安全であることを確認する
。■ Open the tension frame a'/) of the measuring tape storage section (2), inspect the gas flowing into the atmosphere from the orifice θa formed in the top plate (5), and check the content of gas generated in the tank. to ensure that the gas is safe to release into the atmosphere.

■　検尺テープ保管部（２）内に格納しである検尺テー
プ器に）を手に持ちて検尺テープ（イ）′をタンクに）
内に下ろす。■ Hold the measuring tape (stored in the measuring tape storage section (2)) in your hand and place the measuring tape (A)' into the tank).
Lower it inside.

■　テープ先端の錘Ｑ４がタンク（社）底面に接したと
ころで検尺テープ器（２）のハンドルに）を操作して検
尺テープげを引き上げ、液体に触れて変化した位置の目
盛を読んで深さを測定する。■ When the weight Q4 at the tip of the tape touches the bottom of the tank, use the handle of the measuring tape device (2) to pull up the measuring tape and read the scale at the position that changes when it touches the liquid. Measure depth.

上述した操作において、箱体（１）内への窒素の流入量
はタンク（ロ）内圧力と箱体（１）内の圧力の差を検知
して作動する差圧計によって流入ｈＪを調整する。In the above-described operation, the amount of nitrogen flowing into the box (1) is adjusted by a differential pressure gauge that operates by detecting the difference between the pressure inside the tank (b) and the pressure inside the box (1).

又、上述した本装置は検尺テープげを巻き上げて錘（ハ
）を錘格納部（３）内に格納し得るため、計測時にタン
クに）の検尺孔に）上に取付けて使用してもよいが、本
装置はタンクに）の検尺孔に）に据え付は固定したまま
とするも勿論可能である。In addition, since this device described above can store the weight (C) in the weight storage part (3) by winding up the measuring tape, it can be used by attaching it to the measuring hole (in the tank) during measurement. However, it is of course also possible to leave the device fixed in the measuring hole in the tank.

本発明に係る深さ計測方法は以上詳記したように、タン
クの検尺孔上部にオリフィスを設けた箱体を取付け、そ
の箱体に窒素を送シ込みて箱体内の圧力をタンク内のガ
ス圧よシも高くしその状態下で箱体のオリフィスを通し
て検尺孔からタンク内に検尺テープを垂下し、液の深さ
を計測するようにしたものであるから、タンク内のガス
が吹き出るのを確実に防止でき、従って検尺テープを使
用しての計測を安全に行なうことが出来る。As described in detail above, the depth measurement method according to the present invention involves attaching a box with an orifice above the measuring hole of the tank, and pumping nitrogen into the box to adjust the pressure inside the tank. The gas pressure is high, and under these conditions, a measuring tape is hung into the tank from the measuring hole through the orifice of the box body, and the depth of the liquid is measured, so the gas inside the tank is Blowing out can be reliably prevented, and therefore measurements using measuring tape can be carried out safely.

しかも、箱体内に送シ込む気体は窒素であシ大気中に吹
き出るガスは減圧された窒素ガスのみであるため、人体
、公害及び燥発等に対する危検は全くなく、安心して計
測作業を行なうことが出来る。Furthermore, the gas pumped into the box is nitrogen, and the only gas that blows out into the atmosphere is depressurized nitrogen gas, so there is no danger of human health, pollution, or dryness, and measurement work can be carried out with peace of mind. I can do it.

又、本装置は気密性を備えた箱体内をオリフィスを設け
た仕切板で上下方向複数の室に区画１〜、且箱体の上部
に検尺テープ保管部を、又下部に錘格納部を取付け、更
に箱体周壁に窒素導入口を、錘格納部周壁に窒素排出口
を設けたものであるから、簡単な構造で容易に所望の圧
力を得ることが出来る。In addition, this device has an airtight box inside which is divided into multiple chambers in the vertical direction by partition plates with orifices.In addition, the box has a measuring tape storage section at the top and a weight storage section at the bottom. In addition, since a nitrogen inlet is provided on the peripheral wall of the box body and a nitrogen outlet is provided on the peripheral wall of the weight storage portion, the desired pressure can be easily obtained with a simple structure.

しかも、箱体の内部はオリアイスを備えた仕切板によっ
て複数の室に区画自在としたため、タンク内のガス圧が
高い場合は仕切板を増やして室数を多くすれば少ない窒
素の供給で箱体内の圧力を高くすることが出来、？ｔｌ
測しようとするタンクに充分に対応することが出来る。In addition, the inside of the box can be divided into multiple chambers using partition plates equipped with oriice, so if the gas pressure inside the tank is high, increasing the number of chambers by increasing the partition plates will allow the inside of the box to be filled with less nitrogen. Can the pressure be increased? tl
It can fully correspond to the tank to be measured.

又、箱体の上部に検尺テープ保管部を、下部に錘格納部
を設けたものであるから、検尺テープ器を保管部に収納
セットできると共に、検尺テープの先端に連結ぜる錘は
格納部に格納保持できる。In addition, since the box has a measuring tape storage section at the top and a weight storage section at the bottom, the measuring tape device can be stored and set in the storage section, and the measuring tape device can be stored and set in the storage section. can be stored and maintained in the storage section.

従って、圧力室を構成する箱体と検尺テープ益金一体化
して持ち運ぶことが出来ると共に、定期的に計測をする
ようなタンクの場合は該タンクの検尺孔上部に据え付は
固定することも可能で、この場合計測時以外は検尺テー
プ保管部は蓋枠によって密閉状態となるため検尺テープ
器が風・雨等に晒されるといった心配は全くなく安心し
て使用できる。Therefore, the box that makes up the pressure chamber and the measuring tape can be carried as one unit, and in the case of a tank where measurements are taken regularly, it can be fixed above the measuring hole of the tank. In this case, the measuring tape storage section is sealed by the lid frame except during measurement, so there is no worry that the measuring tape device will be exposed to wind, rain, etc., and it can be used with peace of mind.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明計測装置の一実施例を示し、第１図はタン
クに取付けた状態の一部切欠正面図第２図は本装置の縦
断正面図、第３図は同平面図、第４図は箱体の上部に取
付けられる天板の断面図、第５図は同平面図、第６図は
仕切板に設けられたオリフィス部分の拡大平面図、第７
図は第６図の（７）　−（７）線に沿える断面図、第８
図は第６図の（８）　−（８）線に沿える断面図、第９
図は間隔保持筒のｔｉｌｔ面図、第１０図は同平面図、
第１１図は仕切板の断面図、第１２図は同平面図である
。 図中、（１）二箱体　　　　（２）：検尺テープ保管器
（３）：錘格納部　　　（８）：仕切板（ロ）；オリフ
ィス　　（６）−窒素導入口ば：検尺テープ　　（ハ）
：　錘 （ハ）：窒素排出口　　＠：タンク 特許出願人　　　財団法人　新日本検定協会第１図 第１０図 第９図 狛 第１２図 ４１’ｊｌ１図 ８５−The drawings show an embodiment of the measuring device of the present invention, and FIG. 1 is a partially cutaway front view of the measuring device installed in a tank. FIG. 2 is a longitudinal sectional front view of the device, FIG. 3 is a plan view of the same, and FIG. 4 5 is a cross-sectional view of the top plate attached to the top of the box, FIG. 6 is an enlarged plan view of the orifice provided in the partition plate, and FIG.
The figure is a cross-sectional view taken along line (7)-(7) in Figure 6.
The figure is a cross-sectional view taken along line (8)-(8) in Figure 6.
The figure is a tilt view of the spacing cylinder, FIG. 10 is a plan view of the same,
FIG. 11 is a sectional view of the partition plate, and FIG. 12 is a plan view thereof. In the figure, (1) Two boxes (2): Measuring tape storage (3): Weight storage (8): Partition plate (B); Orifice (6) - Nitrogen inlet: Measuring tape (H) )
: Weight (c): Nitrogen outlet @: Tank Patent applicant New Japan Certification Association Figure 1 Figure 10 Figure 9 Koma Figure 12 Figure 41'jl1 Figure 85-

Claims (2)

【特許請求の範囲】[Claims] （１）　　タンクに設けられた検尺孔に、オリアイスを
設けた箱体を取付け、その箱体に窒素を送シ込みて該箱
体内の圧力をタンク内のガス圧よシも高くシ、その状態
下で箱体のオリイ７スを通して検尺孔からタンク内に検
尺テープを垂下し、以下常法によシ計測することを特徴
とするタンク内の液深さ計測方法。(1) Attach a box equipped with Oriice to the measuring hole provided in the tank, and pump nitrogen into the box to raise the pressure inside the box to a level higher than the gas pressure inside the tank. A method for measuring the depth of liquid in a tank, which is characterized in that a measuring tape is hung into the tank from a measuring hole through seven orifices of a box body under normal conditions, and the measurement is carried out in the following conventional manner. （２）気密性を備えた箱体の上部に密閉可能な検尺テー
プ保管部を形成し、箱体の下側には円筒状の錘帖納部を
連設し、且箱体の周壁に窒素導入口を設ける一方錘格納
部局壁には窒素排出口を設け、更に箱体の上下面には検
尺テープが挿通されるオリフィスｔ−ｒＪ１１設すると
共に箱体内はタンク内のガス圧に応じオリフィスを備え
た仕切板で上下方向複数の室に区画自在としたことを特
徴とする計測装置。(2) A sealable measurement tape storage area is formed on the top of the airtight box, a cylindrical weight storage area is provided on the bottom of the box, and While a nitrogen inlet is provided, a nitrogen outlet is provided on the wall of the weight storage section, and an orifice trJ11 through which a measuring tape is inserted is provided on the upper and lower surfaces of the box, and the interior of the box is adjusted to the gas pressure in the tank. A measuring device characterized in that it can be freely partitioned into multiple chambers in the vertical direction using a partition plate with an orifice.