JP3524970B2 - Float type liquid level gauge - Google Patents
Float type liquid level gaugeInfo
- Publication number
- JP3524970B2 JP3524970B2 JP28912694A JP28912694A JP3524970B2 JP 3524970 B2 JP3524970 B2 JP 3524970B2 JP 28912694 A JP28912694 A JP 28912694A JP 28912694 A JP28912694 A JP 28912694A JP 3524970 B2 JP3524970 B2 JP 3524970B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid level
- box
- worm
- magnet
- main body
- 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.)
- Expired - Lifetime
Links
Landscapes
- Level Indicators Using A Float (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は液体タンク内の液面位置
指示及び遠隔指示を行うフロート式液面計に関する。
【０００２】
【従来の技術】従来タンク取付部に現場指示目盛の付い
たフロートを用いた機械式液面計として、該液面計の箱
体内に減速機構と共に電気的な発信器等を取付けた構造
のものが知られている。
【０００３】
【発明が解決しようとする課題】この従来の液面計によ
れば、前記減速機構や発信器等の電気的な変換器がタン
ク内の環境にさらされているため場合によってはガス、
蒸気等の影響により、特に電気的な変換器の寿命を縮め
たり故障の原因となっていた。
【０００４】本発明はこれらの問題点を解消し、液面の
目盛表示と電気的な変換機構をタンク内環境から隔離
し、高精度な指示と調整が容易で、廉価に製作できるフ
ロート式液面計を提供することを目的とする。
【０００５】
【課題を解決するための手段】本発明は上記の目的を達
成すべく液体タンクの上部開口に連設可能な下部開口を
有する箱形本体内に、下端にフロートを結着しこれら開
口内を挿通するワイヤー、テープ等の紐状体を捲回した
巻取ドラムを軸着すると共に、前記箱形本体の側面に取
付けた該計器室箱体内に液面表示部に連なる計器機構を
設け、前記巻取ドラムに連設した主動側磁石と前記計器
機構に連設した従動側磁石とを、非磁性材からなる隔壁
を介して回転伝動磁気結合し、前記計器機構は前記円筒
形磁石又はリング状磁石を有するウォーム機構とクラッ
チ機構と補助減速機構とからなると共に前記計器室箱体
は前記ウォーム機構のウォーム軸を中心に前記箱形本体
に対して所定角度変更可能に取付けできることを特徴と
する。
【０００６】
【作用】請求項１のフロート式液面計において、下端に
フロートを結着したワイヤー等の巻取ドラムと計器機構
とを非磁性材の隔壁を介して回転伝動磁気結合したこと
により、液体タンク内部より生ずるガス、蒸気、水分等
の影響から計器機構を隔離して、該計器機構の寿命を延
ばし保全性を高めることができ、又ウォーム機構、クラ
ッチ機構、補助減速機構により、現場での液面指示を高
精度に行うことができ、更に該ウォーム機構により計器
室箱体がウォーム軸を中心に回動でき目盛面を水平、垂
直等の所定角度に取付けることができる。
【０００７】
【０００８】
【０００９】
【００１０】
【００１１】
【００１２】
【００１３】
【００１４】
【実施例】本発明による１実施例を図１により説明す
る。
【００１５】１はアルミニウム製の箱形本体を示し、該
箱形本体１はその下面が開口しており、該開口の周縁部
において液体タンク２の頂面の開口部２ｂの周縁部に螺
着されている。
【００１６】又前記本体１の側面に非磁性体の凹部１ｂ
を形成し、該凹部１ｂの頂面に軸１ａを側方に突設し、
該軸１ａに回動自在に軸支した巻取ドラム５に捲回され
ているワイヤー４は前記開口部内を垂下しその下端にワ
イヤー係止具３ａによりフロート３を係止している。
【００１７】そして該巻取ドラム５の側面に筒体５ａを
突設し、該筒体５ａ内面に、前記凹部１ｂの外面を間隙
を存して囲繞する磁気結合の主動側のフェライト製のリ
ング状二極磁石６を嵌着した。
【００１８】７は計器室箱体を示し、該計器室箱体７は
その側面において前記本体１の側面に取りつけられ、該
計器室箱体７の側面に軸受８ａにより軸支した軸８の一
端に従動側の円筒形二極磁石９を固定し、該二極磁石９
は前記凹部１ｂ内に介入すると共に該凹部１ｂの非磁性
の側壁を介して前記液体タンク２側とは隔離されて前記
リング状二極磁石６と磁気結合している。
【００１９】又前記軸８の他端にウォーム１０を固定
し、該ウォーム１０と歯合するウォームギア１１の軸１
１ａにクラッチ機構１２の入力側を連結し、該クラッチ
機構１２の出力側は補助減速機構１３を介して、遠隔個
所への液面指示を発信するための回転位置センサー１４
である１回転型のポテンショメータ又は可変抵抗器に接
続し、該回転位置センサー１４の出力軸に現場での液面
の目盛指示を示す指針１５が直結されている。
【００２０】尚１６は目盛板、１７はガラス板を示す。
【００２１】次に上記実施例の液面計の作動について説
明する。
【００２２】液体タンク２内の液面２ａ上に浮いたフロ
ート３が液面２ａの上下の移動に従って上下に移動する
と、これに伴ってワイヤー４を介して巻取ドラム５が正
方向或いは逆方向に回転し、リング状二極磁石６と円筒
形二極磁石９との磁気結合により軸８を介してウォーム
１０が回転し、該ウォーム１０の回転によりこれに噛合
するウォームギア１１が減速回転し、接続状態のクラッ
チ機構１２及び補助減速機構１３を介して回転位置セン
サー１４を回転作動させると共に、指針１５を正方向或
いは逆方向に回転させて液面２ａを指示する。
【００２３】ここで、リング状二極磁石６と円筒形二極
磁石９との間には凹部１ｂの非磁性の側壁により隔離さ
れているので、一連の計器機構は計器室箱体８内で密閉
され、液体タンク２内の有害なガス、蒸気などから完全
に保護されている。
【００２４】又図２に示すが如く磁気結合には主動側の
初期回転に対して、従動側は１．５°遅れてから追動す
るという基本的に±１．５°程度の磁気ヒステリシスに
よる誤差を生じてもウォーム１０とウォームギア１１と
のウォームギア機構及び補助減速機構１３により、回転
位置センサー１４及び指針１５に対して前記誤差が許容
範囲内に縮小される。
【００２５】尚、クラッチ機構は、非可逆回転機構であ
るウォーム１０とウォームギア１１のウォームギア機構
により、液面計を液体タンク２に設置した後、液体タン
ク内の実際の液体量に指針を回転させて量目合わせの調
整が簡単にできることのために介在されている。
【００２６】更に、計器室箱体７は前記ウォームの軸を
中心に箱形本体１へ取付けに際して、図３に示すが如く
目盛板を水平に設置したり、図４の如く垂直に設置する
こともできる。
【００２７】他の実施例について図５において説明す
る。
【００２８】これは回転伝動磁気結合において、主動側
磁石が９′の円筒形磁石で、従動側磁石が６′のリング
状磁石に形成されたものである。
【００２９】
【発明の効果】このように本発明によると、下端にフロ
ートを結着したワイヤー等の巻取ドラムと計器機構とを
非磁性材の隔壁を介して回転伝動磁気結合したことによ
り、液体タンク内部より生ずるガス、蒸気、水分等の影
響から計器機構を隔離して、該計器機構の寿命を延ばし
保全性を高めることができる効果を有し、又減速機構に
よって磁気ヒステリシスによる誤差を許容範囲内に縮小
し、更に非可逆回転機構であるウォームギヤ機構とクラ
ッチ機構を用いたことによって設置後の調整が簡便であ
るという効果を有する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float type liquid level gauge for indicating a liquid level in a liquid tank and for remotely indicating the liquid level. 2. Description of the Related Art Conventionally, as a mechanical level gauge using a float with a scale indicating the site on a tank mounting portion, an electric transmitter and the like are mounted together with a speed reduction mechanism inside a box of the level gauge. Structures are known. [0003] According to this conventional liquid level gauge, an electric converter such as the deceleration mechanism or the transmitter is exposed to the environment inside the tank, and in some cases, the gas level is reduced. ,
The influence of steam or the like has particularly shortened the life of the electrical converter or caused a failure. [0004] The present invention solves these problems, isolates the scale display of the liquid level and the electrical conversion mechanism from the environment in the tank, and allows a high-precision indication and adjustment to be easily performed at a low cost. The purpose is to provide an area gauge. [0005] In order to achieve the above object, the present invention provides a box-shaped main body having a lower opening which can be connected to an upper opening of a liquid tank. A wire mechanism inserted in the opening, a winding drum wound around a string-shaped body such as a tape, and a gauge mechanism connected to a liquid level display unit inside the meter chamber box attached to the side surface of the box-shaped main body. provided, and a driven magnet provided continuously to the main driving side magnet provided continuously to the winding drum the meter mechanism, and rotation transmitting magnetic coupling through the partition wall made of a nonmagnetic material, said meter mechanism is the cylindrical
A worm mechanism with a
The instrument chamber box, comprising a switch mechanism and an auxiliary deceleration mechanism.
Is the box-shaped main body around the worm shaft of the worm mechanism
It is characterized in that it can be mounted so as to be able to change a predetermined angle with respect to. In the float type liquid level meter according to the first aspect, the winding drum such as a wire having a float attached to the lower end and the instrument mechanism are rotationally and magnetically coupled via a non-magnetic material partition. , gas produced from the liquid inside the tank, the steam, from the effects of moisture and the like to isolate the meter mechanism, it is possible to improve the integrity extends the life of the regimen unit mechanism, also the worm mechanism, Kura
Switch and auxiliary deceleration mechanism to increase the liquid level indication on site
Accuracy, and the worm mechanism
The chamber box can rotate around the worm axis and the scale surface is horizontal and vertical.
Ru can be mounted at a predetermined angle straight like. An embodiment according to the present invention will be described with reference to FIG. Reference numeral 1 denotes an aluminum box-shaped main body. The box-shaped main body 1 has an opening at the lower surface, and is screwed to the periphery of the opening 2b on the top surface of the liquid tank 2 at the periphery of the opening. Have been. A concave portion 1b made of a non-magnetic material is formed on a side surface of the main body 1.
Is formed, and a shaft 1a is laterally protruded from the top surface of the concave portion 1b.
A wire 4 wound around a winding drum 5 rotatably supported on the shaft 1a hangs down in the opening and locks the float 3 at its lower end by a wire locking member 3a. A cylindrical ferrite ring 5a is protruded from the side surface of the winding drum 5, and a ferrite ring on the driving side of the magnetic coupling for surrounding the outer surface of the concave portion 1b with a gap on the inner surface of the cylindrical body 5a. A bipolar magnet 6 was fitted. Reference numeral 7 denotes an instrument room box. The instrument room box 7 is attached to the side surface of the main body 1 on one side, and one end of a shaft 8 supported on the side surface of the instrument room box 7 by a bearing 8a. , The cylindrical magnet 2 on the driven side is fixed.
Is magnetically coupled to the ring-shaped bipolar magnet 6 while being interposed in the concave portion 1b and separated from the liquid tank 2 side via a non-magnetic side wall of the concave portion 1b. A worm 10 is fixed to the other end of the shaft 8, and a shaft 1 of a worm gear 11 meshed with the worm 10.
1a is connected to the input side of a clutch mechanism 12, and the output side of the clutch mechanism 12 is connected via an auxiliary speed reduction mechanism 13 to a rotational position sensor 14 for transmitting a liquid level indication to a remote location.
Is connected to a one-rotation potentiometer or a variable resistor, and an output shaft of the rotation position sensor 14 is directly connected to a pointer 15 for indicating a liquid level scale at the site. Reference numeral 16 denotes a scale plate, and 17 denotes a glass plate. Next, the operation of the liquid level gauge of the above embodiment will be described. When the float 3 floating on the liquid surface 2a in the liquid tank 2 moves up and down according to the up and down movement of the liquid surface 2a, the winding drum 5 moves in the forward or reverse direction via the wire 4 accordingly. The worm 10 rotates via the shaft 8 by the magnetic coupling between the ring-shaped bipolar magnet 6 and the cylindrical bipolar magnet 9, and the rotation of the worm 10 causes the worm gear 11 meshing with the worm 10 to rotate at a reduced speed. The rotational position sensor 14 is rotated via the connected clutch mechanism 12 and the auxiliary deceleration mechanism 13, and the pointer 15 is rotated in the forward or reverse direction to indicate the liquid level 2a. Since the ring-shaped dipole magnet 6 and the cylindrical dipole magnet 9 are separated by the non-magnetic side wall of the concave portion 1b, a series of instrument mechanisms are arranged in the instrument room box 8. It is hermetically sealed and completely protected from harmful gases, vapors and the like in the liquid tank 2. As shown in FIG. 2, the magnetic coupling is based on a magnetic hysteresis of about. +-. 1.5.degree. Even if an error occurs, the error with respect to the rotational position sensor 14 and the pointer 15 is reduced to an allowable range by the worm gear mechanism between the worm 10 and the worm gear 11 and the auxiliary reduction mechanism 13. The clutch mechanism uses a worm gear mechanism of a worm 10 and a worm gear 11, which are irreversible rotating mechanisms, to install a liquid level gauge in the liquid tank 2 and then rotate the pointer to the actual liquid amount in the liquid tank. It is interposed for easy adjustment of the weight adjustment. Further, when mounting the instrument room box 7 on the box-shaped main body 1 around the axis of the worm, the scale plate may be installed horizontally as shown in FIG. 3 or vertically as shown in FIG. You can also. Another embodiment will be described with reference to FIG. In the rotary transmission magnetic coupling, the driving side magnet is a cylindrical magnet 9 'and the driven side magnet is a ring magnet 6'. As described above, according to the present invention, the take-up drum such as a wire having a float connected to the lower end and the instrument mechanism are rotationally magnetically coupled to each other through a non-magnetic partition wall. It has the effect of isolating the instrument mechanism from the effects of gas, vapor, moisture, etc. generated from the inside of the liquid tank, extending the life of the instrument mechanism and improving maintainability, and allowing errors due to magnetic hysteresis by the reduction mechanism. The use of a worm gear mechanism and a clutch mechanism, which are non-reciprocal rotation mechanisms, has an effect that adjustment after installation is simple.
【図面の簡単な説明】
【図１】 本発明の１実施例の断面図である。
【図２】 磁気結合の磁気ヒステリシスの誤差の説明図
である。
【図３】 液面表示部の目盛板を上方に向けて計器室箱
体を取付けた状態を示す斜視図である。
【図４】 液面表示部の目盛板を側方に向けて計器室箱
体を取付けた状態を示す斜視図である。
【図５】 磁気結合の異なる他の実施例の断面図であ
る。
【符号の説明】
１ 箱形本体
２ 液体タンク
３ フロート
４ ワイヤー
５ 巻取ドラム
６ リング状二極磁石
７ 計器室箱体
９ 円筒形二極磁石
１０、１１ ウォーム機構
１２ クラッチ機構
１３ 補助減速機構
１４ 回転位置センサー
１５、１６、１７ 液面表示部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of one embodiment of the present invention. FIG. 2 is an explanatory diagram of an error in magnetic hysteresis of magnetic coupling. FIG. 3 is a perspective view showing a state in which an instrument room box is attached with a scale plate of a liquid level display unit facing upward. FIG. 4 is a perspective view showing a state in which an instrument room box is attached with the scale plate of the liquid level display unit facing sideways. FIG. 5 is a sectional view of another embodiment having different magnetic coupling. [Description of Signs] 1 Box-shaped main body 2 Liquid tank 3 Float 4 Wire 5 Winding drum 6 Ring-shaped bipolar magnet 7 Instrument room box 9 Cylindrical bipolar magnet 10, 11 Worm mechanism 12 Clutch mechanism 13 Auxiliary deceleration mechanism 14 Rotation position sensor 15, 16, 17 Liquid level display
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01F 23/62 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) G01F 23/62
Claims (1)
開口を有する箱形本体内に、下端にフロートを結着しこ
れら開口内を挿通するワイヤー、テープ等の紐状体を捲
回した巻取ドラムを軸着すると共に、前記箱形本体の側
面に取付けた該計器室箱体内に液面表示部に連なる計器
機構を設け、前記巻取ドラムに連設した主動側磁石と前
記計器機構に連設した従動側磁石とを、非磁性材からな
る隔壁を介して回転伝動磁気結合し、前記計器機構は前
記円筒形磁石又はリング状磁石を有するウォーム機構と
クラッチ機構と補助減速機構とからなると共に前記計器
室箱体は前記ウォーム機構のウォーム軸を中心に前記箱
形本体に対して所定角度変更可能に取付けできることを
特徴とするフロート式液面計。(57) [Claim 1] A wire or a tape which has a lower end attached to a float in a box-shaped main body having a lower opening which can be connected to an upper opening of a liquid tank, and penetrates through these openings. An instrument mechanism connected to a liquid level display section is provided in the instrument chamber box attached to the side surface of the box-shaped main body. a driven-side magnet set the main drive side magnet and continuously to the meter mechanism, and rotation transmitting magnetic coupling through the partition wall made of a nonmagnetic material, the meter mechanism before
A worm mechanism having a cylindrical magnet or a ring-shaped magnet;
A meter comprising a clutch mechanism and an auxiliary speed reduction mechanism;
The chamber box is provided around the worm shaft of the worm mechanism.
A float-type liquid level gauge which can be attached to a main body so as to be able to change a predetermined angle .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28912694A JP3524970B2 (en) | 1994-10-28 | 1994-10-28 | Float type liquid level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28912694A JP3524970B2 (en) | 1994-10-28 | 1994-10-28 | Float type liquid level gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08128879A JPH08128879A (en) | 1996-05-21 |
| JP3524970B2 true JP3524970B2 (en) | 2004-05-10 |
Family
ID=17739106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28912694A Expired - Lifetime JP3524970B2 (en) | 1994-10-28 | 1994-10-28 | Float type liquid level gauge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3524970B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009537819A (en) * | 2006-05-19 | 2009-10-29 | クオリトロル コーポレーション | Calibrated fluid level monitoring gauge |
| CN110987103A (en) * | 2019-12-20 | 2020-04-10 | 三一重机有限公司 | Liquid level measuring method and device and engineering machinery |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100817148B1 (en) * | 2001-10-24 | 2008-03-27 | 주식회사 포스코 | Apparatus for detecting accumulated sludge in thickener pond |
| DE102012209905A1 (en) * | 2012-06-13 | 2013-12-19 | Krones Ag | Capper for containers |
-
1994
- 1994-10-28 JP JP28912694A patent/JP3524970B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009537819A (en) * | 2006-05-19 | 2009-10-29 | クオリトロル コーポレーション | Calibrated fluid level monitoring gauge |
| CN110987103A (en) * | 2019-12-20 | 2020-04-10 | 三一重机有限公司 | Liquid level measuring method and device and engineering machinery |
| CN110987103B (en) * | 2019-12-20 | 2021-10-29 | 三一重机有限公司 | Liquid level measuring method and device and engineering machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08128879A (en) | 1996-05-21 |
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