JP5375285B2 - Electromagnetic flow meter - Google Patents
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Abstract
Description
本発明は、電磁流量計に関するものである。
更に詳述すれば、電磁流量形の電極を覆う金属製のキャップに関するものである。
The present invention relates to an electromagnetic flow meter.
More specifically, the present invention relates to a metal cap covering an electromagnetic flow rate type electrode.
図８は、従来より一般に使用されている従来例の構成説明図で、例えば、特開２００２−１３９３５５号に示されている。
図において、１は測定管、２は測定管１に設けられたライニング体である。
FIG. 8 is a diagram illustrating a configuration of a conventional example that is generally used conventionally, and is disclosed in, for example, Japanese Patent Application Laid-Open No. 2002-139355.
In the figure, 1 is a measuring tube, and 2 is a lining body provided on the measuring tube 1.
３はライニング体２に設けられた接液電極である。
４は接液電極３の上部を覆う絶縁材の絶縁プレートである。
５は接液電極３の取り付け穴の周囲の測定管１に設けられた電極ボスである。
Reference numeral 3 denotes a wetted electrode provided on the lining body 2.
Reference numeral 4 denotes an insulating plate made of an insulating material covering the upper part of the liquid contact electrode 3.
Reference numeral 5 denotes an electrode boss provided in the measuring tube 1 around the attachment hole of the liquid contact electrode 3.
６は電極キャップで、電極ボス５と接液電極室７を構成する。
８は接液電極室７内の電極キャップ６と絶縁キャップ４との間に設けられ、接液電極３をライニング体２に押圧するばねである。
９は励磁コイルである。
An electrode cap 6 constitutes an electrode boss 5 and a liquid contact electrode chamber 7.
A spring 8 is provided between the electrode cap 6 and the insulating cap 4 in the liquid contact electrode chamber 7 and presses the liquid contact electrode 3 against the lining body 2.
Reference numeral 9 denotes an exciting coil.
このような装置においては、以下の問題点がある。
電磁流量計の電極は発生した信号起電力をピックアップする機能を有するが、電磁流量計自身のもつ励磁コイルから発生する電気ノイズによって外乱を受けてしまう。
このため電極部分を金属で覆って、電気的にシールドし、耐ノイズ性を向上させる必要がある。
このため、電極ボスに金属性のキャップが取り付けられている。
Such an apparatus has the following problems.
The electrode of the electromagnetic flow meter has a function of picking up the generated signal electromotive force, but is disturbed by electrical noise generated from the excitation coil of the electromagnetic flow meter itself.
For this reason, it is necessary to cover an electrode part with a metal and to shield electrically, and to improve noise resistance.
For this reason, a metallic cap is attached to the electrode boss.
金属キャップと電極ボスとは、シールドの機能を保つように、接触させながら取り付ける必要がある。
しかし、円筒状の電極ボスは、金属パイプや鋳物から製作されるケースが多く、直径の許容寸法差が大きく、例えば、±０．５ｍｍほどになってしまう。
金属キャップが電極ボスの直径の許容寸法差を吸収して接触することは難かしく、確実にシールド機能をはたすことは困難であった。
The metal cap and the electrode boss must be attached while being in contact with each other so as to maintain the function of the shield.
However, many cylindrical electrode bosses are manufactured from metal pipes or castings, and the allowable dimensional difference in diameter is large, for example, about ± 0.5 mm.
It has been difficult for the metal cap to absorb the allowable dimensional difference in the diameter of the electrode boss and make contact, and it has been difficult to reliably perform the shielding function.
本発明の目的は、上記の課題を解決するもので、金属キャップを円筒形状から湾曲した多角形形状の断面形状とし、側面に切欠き部を設けることによって、電極ボスの外径の変化に対しても、シールド機能を保持できるようにする電磁流量計を提供することにある。 The object of the present invention is to solve the above-mentioned problems. By changing the metal cap from a cylindrical shape to a polygonal cross-sectional shape and providing a notch on the side surface, the outer diameter of the electrode boss can be reduced. However, it is in providing the electromagnetic flowmeter which enables it to hold | maintain a shield function.
このような課題を達成するために、本発明では、請求項１の電磁流量計においては、
接液電極の取り付け穴の周囲の測定管に設けられ前記取り付け穴の中心を中心に円形をなすリング状の電極ボスと、この電極ボスに取り付けられこの電極ボスと共に前記接液電極をシールドする金属材よりなるキャップとを具備する電磁流量計において、蓋面に平行に多角形断面形状を有するキャップ本体と、このキャップ本体の側面の前記蓋面に直交する方向に設けられた１個の切欠き部とを有するキャップを具備し、前記電極ボスの外形寸法が許容寸法公差の最大状態において前記切欠き部が広がって且つ前記キャップ本体の側面の少なくとも三箇所が前記電極ボスに接して前記電極ボスに前記キャップが装着されるようにされたことを特徴とする電磁流量計。
In order to achieve such a problem, in the present invention, in the electromagnetic flow meter of claim 1,
A ring-shaped electrode boss which is provided in a measurement tube around the attachment hole of the liquid contact electrode and forms a circle around the center of the attachment hole, and a metal which is attached to the electrode boss and shields the liquid contact electrode together with the electrode boss In an electromagnetic flow meter comprising a cap made of a material, a cap body having a polygonal cross-sectional shape parallel to the lid surface, and one notch provided in a direction perpendicular to the lid surface on the side surface of the cap body The electrode boss has an outer dimension of the allowable dimensional tolerance, the notch is widened, and at least three sides of the cap body are in contact with the electrode boss. An electromagnetic flow meter characterized in that the cap is attached to the body.
本発明の請求項２の電磁流量計においては、請求項１記載の電磁流量計において、
前記キャップ本体は、三角形断面形状を有すること
を特徴とする。
In the electromagnetic flow meter according to claim 2 of the present invention, in the electromagnetic flow meter according to claim 1,
The cap body has a triangular cross-sectional shape.
本発明の請求項３の電磁流量計においては、請求項１記載の電磁流量計において、
前記キャップ本体は、Ｄ字型断面形状を有することを特徴とする。
In the electromagnetic flow meter according to claim 3 of the present invention, in the electromagnetic flow meter according to claim 1,
The cap body has a D-shaped cross-sectional shape.
本発明の請求項１によれば、次のような効果がある。
円筒形状の電極ボスの寸法許容差が大きい場合でも、キャップが確実に電極ボスと接触してシールド機能を満足することができる電磁流量計が得られる。
According to claim 1 of the present invention, there are the following effects.
Even when the dimensional tolerance of the cylindrical electrode boss is large, an electromagnetic flow meter can be obtained in which the cap can reliably contact the electrode boss and satisfy the shield function.
本発明の請求項２によれば、次のような効果がある。
キャップ本体は、三角形断面形状を有するので、少なくとも３箇所において、キャップ本体が電極ボスに接触し、シールド機能が確実に確保できる電磁流量計が得られる。
According to claim 2 of the present invention, there are the following effects.
Since the cap body has a triangular cross-sectional shape, the cap body comes into contact with the electrode boss at least at three locations, and an electromagnetic flow meter that can ensure the shielding function is obtained.
キャップ本体は、三角形断面形状を有するので、少なくとも３箇所において、キャップ本体が電極ボスに接触し、構造体として安定的な固定が確保できる電磁流量計が得られる。 Since the cap body has a triangular cross-sectional shape, the cap body comes into contact with the electrode boss at least at three locations, and an electromagnetic flow meter capable of ensuring stable fixation as a structure is obtained.
本発明の請求項３によれば、次のような効果がある。
キャップ本体は、Ｄ字型断面形状を有するので、半円形状に近く、製作し易く、安価な電磁流量計が得られる。
According to claim 3 of the present invention, there are the following effects.
Since the cap body has a D-shaped cross-sectional shape, an electromagnetic flow meter that is close to a semicircular shape, is easy to manufacture, and is inexpensive can be obtained.
以下本発明を図面を用いて詳細に説明する。
図１は本発明の一実施例の要部構成説明図、図２は図１の要部構成説明図、図３は図２の斜視説明図、図４は図１の動作説明図、図５は図１の動作説明図である。
図において、図８と同一記号の構成は同一機能を表す。
以下、図８との相違部分のみ説明する。
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory diagram of the main part configuration of one embodiment of the present invention, FIG. 2 is an explanatory diagram of the main part configuration of FIG. 1, FIG. 3 is an explanatory perspective view of FIG. FIG. 2 is an operation explanatory diagram of FIG. 1.
In the figure, the same symbols as those in FIG. 8 represent the same functions.
Only the difference from FIG. 8 will be described below.
図１，図２，図３において、キャップ２１は、蓋面２１ａに平行に多角形断面形状を有するキャップ本体２１１と、このキャップ本体２１１の側面の蓋面２１ａに直交する方向に設けられた少なくとも１個の切欠き部２１２とを有する。
この場合は、多角形断面形状は、三角形断面形状が使用されている。
なお、図２において、（ａ）は正面図、（ｂ）は平面図、（ｃ）は側面図である。
図３において、（ａ）は斜視図、（ｂ）はキャップ２１を裏返した斜視図である。
1, 2, and 3, the cap 21 includes at least a cap body 211 having a polygonal cross-sectional shape parallel to the lid surface 21 a and a direction orthogonal to the lid surface 21 a on the side surface of the cap body 211. One notch 212 is provided.
In this case, a triangular cross-sectional shape is used as the polygonal cross-sectional shape.
2A is a front view, FIG. 2B is a plan view, and FIG. 2C is a side view.
3A is a perspective view, and FIG. 3B is a perspective view in which the cap 21 is turned upside down.
以上の構成において、図４に示す如く、キャップ２１は、電極ボス５に取り付けられる。
ここで、図５（１）に示す如く、電極ボス５の寸法許容差が標準状態で、キャップ本体２１１は、電極ボス５に接触する。
図５（２）に示す如く、電極ボス５の外径許容差の最小状態でも、キャップ本体２１１は接触して電極ボス５に装着できるようにする。
In the above configuration, the cap 21 is attached to the electrode boss 5 as shown in FIG.
Here, as shown in FIG. 5A, the cap body 211 is in contact with the electrode boss 5 when the dimensional tolerance of the electrode boss 5 is in a standard state.
As shown in FIG. 5 (2), the cap body 211 can be brought into contact with the electrode boss 5 even when the outer diameter tolerance of the electrode boss 5 is minimum.
また、図５（３）に示す如く、電極ボスの外径許容差が最大となったときでも、キャップ本体２１１の側面にある湾曲曲率が変化し、さらに、切欠部２１２が広がるため、電極ボス５に馴染むように機械的に接触する。 Further, as shown in FIG. 5 (3), even when the outer diameter tolerance of the electrode boss is maximized, the curvature of curvature on the side surface of the cap body 211 changes and the notch 212 is further widened. Contact mechanically to adjust to 5.
この結果、円筒形状の電極ボス５の寸法許容差が大きい場合でも、キャップ２１が確実に電極ボス５と接触してシールド機能を満足することができる電磁流量計が得られる。
キャップ本体２１１は、三角形断面形状を有するので、少なくとも３箇所において、キャップ本体が電極ボス５に接触し、シールド機能が確実に確保できる電磁流量計が得られる。
As a result, even when the dimensional tolerance of the cylindrical electrode boss 5 is large, an electromagnetic flow meter can be obtained in which the cap 21 can reliably contact the electrode boss 5 and satisfy the shield function.
Since the cap body 211 has a triangular cross-sectional shape, the cap body comes into contact with the electrode boss 5 in at least three places, and an electromagnetic flow meter that can ensure a shielding function is obtained.
キャップ本体２１１は、三角形断面形状を有するので、少なくとも３箇所において、キャップ本体２１１が電極ボス５に接触し、構造体として安定的な固定が確保できる電磁流量計が得られる。 Since the cap main body 211 has a triangular cross-sectional shape, the cap main body 211 comes into contact with the electrode boss 5 in at least three places, and an electromagnetic flow meter that can ensure stable fixation as a structure is obtained.
図６は、本発明の他の実施例の要部構成説明図で、（ａ）は正面図、（ｂ）は平面図、（ｃ）は側面図、図７は図６の動作説明図である。
図６において、キャップ３１は、電極キャップ形状をＤ型形状としてものである。
キャップ３１は、蓋面３１ａに平行に多角形断面形状を有するキャップ本体３１１と、このキャップ本体３１１の側面の蓋面３１ａに直交する方向に設けられた少なくとも１個の切欠き部３１２とを有する。
6A and 6B are explanatory views of the main configuration of another embodiment of the present invention. FIG. 6A is a front view, FIG. 6B is a plan view, FIG. 7C is a side view, and FIG. is there.
In FIG. 6, the cap 31 has a D-shaped electrode cap shape.
The cap 31 includes a cap body 311 having a polygonal cross-sectional shape parallel to the lid surface 31a, and at least one notch 312 provided in a direction perpendicular to the lid surface 31a on the side surface of the cap body 311. .
Ｄ型形状においても、図７（１）に示す如く、電極ボス５の寸法許容差が標準状態で、キャップ本体３１１は、電極ボス５に接触する。
図７（２）に示す如く、電極ボス５の外径許容差の最小状態でも、キャップ本体３１１は接触して電極ボス５に装着できるようにする。
Even in the D shape, as shown in FIG. 7A, the cap body 311 is in contact with the electrode boss 5 when the dimensional tolerance of the electrode boss 5 is in a standard state.
As shown in FIG. 7 (2), the cap body 311 is brought into contact with the electrode boss 5 even when the outer diameter tolerance of the electrode boss 5 is minimum.
また、図７（３）に示す如く、電極ボスの外径許容差が最大となったときでも、キャップ本体３１１の側面にある湾曲曲率が変化し、さらに、切欠部３１２が広がるため、電極ボス５になじむように機械的に接触する。 Further, as shown in FIG. 7 (3), even when the outer diameter tolerance of the electrode boss is maximized, the curvature of curvature on the side surface of the cap body 311 changes, and the notch 312 expands. 5 to make mechanical contact.
この結果、キャップ本体３１１は、Ｄ字型断面形状を有するので、半円形状に近く、製作し易く、安価な電磁流量計が得られる。 As a result, since the cap body 311 has a D-shaped cross-sectional shape, an electromagnetic flowmeter that is close to a semicircular shape, is easy to manufacture, and is inexpensive can be obtained.
なお、以上の説明は、本発明の説明および例示を目的として特定の好適な実施例を示したに過ぎない。
したがって本発明は、上記実施例に限定されることなく、その本質から逸脱しない範囲で更に多くの変更、変形をも含むものである。
The above description merely shows a specific preferred embodiment for the purpose of explanation and illustration of the present invention.
Therefore, the present invention is not limited to the above-described embodiments, and includes many changes and modifications without departing from the essence thereof.
１ 測定管
２ ライニング体
３ 接液電極
４ 絶縁プレート
５ 電極ボス
６ 電極キャップ
７ 接液電極室
８ ばね
９ 励磁コイル
２１ キャップ
２１ａ 蓋面
２１１ キャップ本体
２１２ 切欠き部
３１ キャップ
３１ａ 蓋面
３１１ キャップ本体
３１２ 切欠き部
DESCRIPTION OF SYMBOLS 1 Measuring tube 2 Lining body 3 Liquid contact electrode 4 Insulation plate 5 Electrode boss 6 Electrode cap 7 Liquid contact electrode chamber 8 Spring 9 Excitation coil 21 Cap 21a Cover surface 211 Cap body 212 Notch 31 Cap 31a Cover surface 311 Cap body
312 Notch
Claims (3)
蓋面に平行に多角形断面形状を有するキャップ本体と、
このキャップ本体の側面の前記蓋面に直交する方向に設けられた１個の切欠き部と
を有するキャップ
を具備し、
前記電極ボスの外形寸法が許容寸法公差の最大状態において前記切欠き部が広がって且つ前記キャップ本体の側面の少なくとも三箇所が前記電極ボスに接して前記電極ボスに前記キャップが装着されるようにされたことを特徴とする電磁流量計。 A ring-shaped electrode boss which is provided in a measurement tube around the attachment hole of the liquid contact electrode and forms a circle around the center of the attachment hole, and a metal which is attached to the electrode boss and shields the liquid contact electrode together with the electrode boss In an electromagnetic flow meter comprising a cap made of a material,
A cap body having a polygonal cross-sectional shape parallel to the lid surface;
A cap having one notch provided in a direction perpendicular to the lid surface on the side surface of the cap body,
When the outer dimension of the electrode boss is at the maximum allowable dimensional tolerance, the notch is widened, and at least three portions of the side surface of the cap body are in contact with the electrode boss so that the cap is attached to the electrode boss. Electromagnetic flowmeter characterized by being made.
を特徴とする請求項１記載の電磁流量計。 The electromagnetic flow meter according to claim 1, wherein the cap body has a triangular cross-sectional shape.
を特徴とする請求項１記載の電磁流量計。 The electromagnetic flow meter according to claim 1, wherein the cap body has a D-shaped cross-sectional shape.
Priority Applications (1)
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|---|---|---|---|
| JP2009093088A JP5375285B2 (en) | 2009-04-07 | 2009-04-07 | Electromagnetic flow meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009093088A JP5375285B2 (en) | 2009-04-07 | 2009-04-07 | Electromagnetic flow meter |
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| JP5375285B2 true JP5375285B2 (en) | 2013-12-25 |
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| JPS55100120U (en) * | 1978-12-29 | 1980-07-12 | ||
| JPH06268393A (en) * | 1993-03-11 | 1994-09-22 | Mitsubishi Electric Corp | Shield method for circuit board |
| JP2007059571A (en) * | 2005-08-24 | 2007-03-08 | Citizen Electronics Co Ltd | Remote control sensor |
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