JPH0339243B2 - - Google Patents
Info
- Publication number
- JPH0339243B2 JPH0339243B2 JP57037931A JP3793182A JPH0339243B2 JP H0339243 B2 JPH0339243 B2 JP H0339243B2 JP 57037931 A JP57037931 A JP 57037931A JP 3793182 A JP3793182 A JP 3793182A JP H0339243 B2 JPH0339243 B2 JP H0339243B2
- Authority
- JP
- Japan
- Prior art keywords
- pair
- detector
- measurement tube
- core
- auxiliary
- 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
- 230000005284 excitation Effects 0.000 claims description 20
- 238000005259 measurement Methods 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 5
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、電磁流量計検出器に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electromagnetic flowmeter detector.
従来形の電磁流量計検出器を第１図に示す。１
対の電極２を有する非磁性金属で作られた測定管
１の内壁には絶縁物のライニング３が施されてい
る。４はコアを兼用した磁性金属でできた外筒
で、この内側に励磁コイル５が取り付けられてい
る。６は配管へ接続するためのフランジである。
A conventional electromagnetic flowmeter detector is shown in Figure 1. 1
The inner wall of a measuring tube 1 made of non-magnetic metal and having a pair of electrodes 2 is provided with an insulating lining 3. Reference numeral 4 denotes an outer cylinder made of magnetic metal that also serves as a core, and an excitation coil 5 is attached inside this outer cylinder. 6 is a flange for connecting to piping.
励磁コイルは一般に電磁流量計検出器の口径に
関係なく巻回数や線径がほぼ同じであるため、口
径が小さくなる程口径に対し励磁コイルの占める
割合が大きくなる。（故に第１図に示すコイル幅
Ｓと口径Ｄとの比、Ｓ／Ｄが大きくなる。）一方、
性能上から有効磁界発生部W0は口径Ｄに対し、
概略0.6〜1D位必要である。 Generally, the number of turns and wire diameter of the excitation coil are approximately the same regardless of the diameter of the electromagnetic flowmeter detector, so the smaller the diameter, the larger the ratio of the excitation coil to the diameter becomes. (Therefore, the ratio of the coil width S to the diameter D shown in FIG. 1, S/D, increases.) On the other hand,
From the viewpoint of performance, the effective magnetic field generating part W 0 is relative to the diameter D,
Approximately 0.6 to 1D is required.
したがつて、従来形では検出器の全長（面間）
L0は、大口径のものでは約1Dが可能であつたが、
口径が小さくなる程口径に対する割合が大きくな
り、口径300mm位では2D位が一般的であつた。電
磁流量計検出器は全長（面間）が短くなればなる
程取扱いが容易となると同時に消費電力が少なく
なる性質があるので、中小口径のものでも全長
（面間）を大口径並の1D位に短かくすることが望
まれていた。 Therefore, in the conventional type, the total length of the detector (between surfaces)
L 0 could be approximately 1D with large diameter ones, but
The smaller the caliber, the larger the ratio to the caliber, and around 300mm in diameter, 2D was common. Electromagnetic flowmeter detectors have the property that the shorter the overall length (between surfaces), the easier they are to handle and the lower the power consumption. It was hoped that it would be made shorter.
本発明は、中小口径の場合でも検出器の全長
（面間）を1D位にすることが可能な電磁流量計検
出器を提供することを目的とする。
An object of the present invention is to provide an electromagnetic flowmeter detector that allows the total length (distance between surfaces) of the detector to be approximately 1D even in the case of a small to medium diameter.
本発明は、１対の電極を有し口径が絶縁物によ
りライニングされた非磁性体製の測定管の外側
に、測定管の外径に合わせた内径を有する円筒面
状の磁性体製の補助コアを前記１対の電極を結ぶ
直線および測定管の軸線を含む平面に面対称の位
置をとつて配置し、この補助コアの外側に沿つて
１対の鞍状の励磁コイルを配置するようにして所
期の目的を達成したものである。
The present invention provides an auxiliary material having a cylindrical surface and an inner diameter matching the outer diameter of the measuring tube, which is placed on the outside of a measuring tube made of a non-magnetic material and having a pair of electrodes and whose diameter is lined with an insulating material. The core is arranged in a plane symmetrical position with respect to a plane including the straight line connecting the pair of electrodes and the axis of the measuring tube, and a pair of saddle-shaped excitation coils are arranged along the outside of this auxiliary core. The intended purpose was achieved.
本発明の一実施例を第２図ａ，ｂを参照して説
明する。両図において、１は測定管、２は電極、
３はライニング、４はコア兼用外筒、５は励磁コ
イル、６はフランジでこれらは第１図のものと同
様である。１１は補助コアで、測定管１の外径に
合わせた内径を有する円筒面状の形状に例えば珪
素鋼板などの磁性体で作られている。そして、こ
の補助コア１１は、１対の電極２を結ぶ直線およ
び測定管１の軸線を含む平面に面対称の位置をと
つて測定管１の外側に１対が配置されている。こ
の補助コア１１の外側に沿つて１対の鞍状の励磁
コイル５が配置されている。
An embodiment of the present invention will be described with reference to FIGS. 2a and 2b. In both figures, 1 is the measurement tube, 2 is the electrode,
3 is a lining, 4 is an outer cylinder which also serves as a core, 5 is an excitation coil, and 6 is a flange, which are the same as those shown in FIG. Reference numeral 11 denotes an auxiliary core, which has a cylindrical shape with an inner diameter matching the outer diameter of the measuring tube 1 and is made of a magnetic material such as a silicon steel plate. A pair of these auxiliary cores 11 are arranged outside the measuring tube 1 so as to be symmetrical with respect to a plane including the straight line connecting the pair of electrodes 2 and the axis of the measuring tube 1 . A pair of saddle-shaped excitation coils 5 are arranged along the outside of this auxiliary core 11 .
このように構成された本発明一実施例の電磁流
量計検出器では、補助コア１１を配置したことに
より、第１図の従来形の検出器において有効磁界
発生部W0が励磁コイル５の内側差し渡し寸法で
あつたものが、有効磁界発生部は補助コア１１の
幅（測定管の長手方向に測つた寸法）W1で定ま
り、励磁コイル５の大きさ（側定管の長手方向に
測つた寸法）は補助コア１１の幅W1より内側に
おさまる大きさで充分従来と同じ目的を達成する
ことができる。これにより励磁コイル５が小さく
なり、検出器の全長（面間）L1は従来形にくら
べて約１／２小さくできる。さらに励磁コイル５
が小さくなつたことによりコイルの直流抵抗が減
少した。 In the electromagnetic flowmeter detector of the embodiment of the present invention configured as described above, by arranging the auxiliary core 11, the effective magnetic field generating part W 0 is located inside the excitation coil 5 compared to the conventional detector shown in FIG. The effective magnetic field generating part is determined by the width of the auxiliary core 11 (measured in the longitudinal direction of the measuring tube), and the size of the excitation coil 5 (measured in the longitudinal direction of the side tube ) . The same purpose as the conventional one can be achieved by having the size (size) that fits inside the width W1 of the auxiliary core 11. As a result, the excitation coil 5 becomes smaller, and the overall length (between surfaces) L1 of the detector can be reduced by about 1/2 compared to the conventional type. Furthermore, excitation coil 5
The direct current resistance of the coil decreased as the
さらに、従来形ではコア４は励磁コイル５の外
側にあつたため、コアを兼用している外筒４の内
径がいわゆる磁極間間隙であつた。ところが、本
発明による検出器では補助コア１１を置いたこと
により、図からも明らかなように測定管１の外径
が磁極間間隙となり、磁極間間隙を小さくするこ
とができる。 Furthermore, in the conventional type, since the core 4 was located outside the excitation coil 5, the inner diameter of the outer cylinder 4, which also served as the core, was the so-called gap between magnetic poles. However, in the detector according to the present invention, by providing the auxiliary core 11, the outer diameter of the measuring tube 1 becomes the gap between the magnetic poles, as is clear from the figure, and the gap between the magnetic poles can be reduced.
励磁コイル５の直流抵抗が減少したことと、磁
極間間隙が縮少したこととの２つの作用効果によ
り電磁流量計検出器の消費電力を約20％少なくす
ることが達成された。 The power consumption of the electromagnetic flowmeter detector was reduced by about 20% due to two effects: the DC resistance of the excitation coil 5 was reduced and the gap between the magnetic poles was reduced.
なお、補助コア１１は第２図ａ，ｂの実施例の
ものに限らず、本発明の変形例である第３図に示
すように、励磁コイル５のコイルで囲まれた内側
空間にも補助コア１２を置くようにしてもよい
し、補助コア１１と１２とを１体で作つてもよ
い。 The auxiliary core 11 is not limited to the embodiment shown in FIGS. 2a and 2b, but can also be used in the inner space surrounded by the excitation coil 5, as shown in FIG. 3, which is a modification of the present invention. The core 12 may be placed or the auxiliary cores 11 and 12 may be made as one unit.
また、補助コアは珪素鋼板でもよいが、鋼や純
鉄、あるいはダクタイル鋳鉄などで作つてもよ
い。 Further, the auxiliary core may be made of a silicon steel plate, but may also be made of steel, pure iron, ductile cast iron, or the like.
またさらに、外筒４がコアを兼用した例につい
て述べたが、外筒の内側と励磁コイルの外側との
間に珪素鋼板などで作られたコアを有する場合に
も全く同様に実施することができる。 Further, although the example in which the outer cylinder 4 also serves as the core has been described, the same implementation can be performed in the case where a core made of a silicon steel plate or the like is provided between the inside of the outer cylinder and the outside of the excitation coil. can.
本発明によれば、測定管の外側に沿わせて磁性
体の補助コアを置き、この補助コアの外側に沿わ
せて励磁コイルを置く構造にしたことにより下記
の効果が得られる。
According to the present invention, the following effects can be obtained by arranging an auxiliary core made of a magnetic material along the outside of the measurement tube and arranging the excitation coil along the outside of the auxiliary core.
〔1〕 磁極間間隙が小さくなり、励磁コイルの大
きさ（測定管の長手方向に測つた寸法）は補助
コアの幅（測定管の長手方向に測つた寸法）よ
り小さくても充分な磁界を得ることができ、従
来形の検出器と同じ磁界を得るには補助コアの
幅W1は第１図のW0より小さくできる。したが
つて、検出器の全長（面間）L1は従来形のほ
ぼ１／２にでき、口径比でいえばL1≒1Dが中
小口径の場合でも可能になる。[1] The gap between the magnetic poles becomes smaller, and even if the size of the excitation coil (measured in the longitudinal direction of the measuring tube) is smaller than the width of the auxiliary core (dimension measured in the longitudinal direction of the measuring tube), a sufficient magnetic field can be generated. To obtain the same magnetic field as the conventional detector, the width W 1 of the auxiliary core can be smaller than W 0 in FIG. Therefore, the total length (between surfaces) L 1 of the detector can be reduced to approximately 1/2 of that of the conventional type, and in terms of aperture ratio, L 1 ≒ 1D is possible even when the aperture is small or medium.
〔2〕 励磁コイルを小さくできることによるコイ
ルの直流抵抗の減少と磁極間間隙縮少とにより
検出器の消費電力が約20％削減される。[2] By making the excitation coil smaller, the DC resistance of the coil is reduced and the gap between the magnetic poles is reduced, reducing the power consumption of the detector by approximately 20%.
〔3〕 検出器の全長（面間）の短縮により検出器
が小形軽量化され、据付、保守等の取扱いが容
易になる。[3] By shortening the overall length (between surfaces) of the detector, the detector becomes smaller and lighter, making installation, maintenance, and other handling easier.
〔4〕 小形化された分価格が低減される。[4] The price is reduced due to the smaller size.
第１図は従来形の電磁流量計検出器の縦断面
図、第２図ａ，ｂは本発明一実施例の電磁流量計
検出器を示すもので、第２図ａは縦断面図、第２
図ｂは横断面図、第３図は本発明一変形例の電磁
流量計検出器の要部縦断面図である。
１……測定管、２……電極、３……ライニン
グ、４……コア兼用外筒、５……励磁コイル、６
……フランジ、１１，１２……補助コア。
Fig. 1 is a vertical sectional view of a conventional electromagnetic flowmeter detector, and Figs. 2a and b show an electromagnetic flowmeter detector according to an embodiment of the present invention. 2
FIG. b is a cross-sectional view, and FIG. 3 is a vertical cross-sectional view of a main part of an electromagnetic flowmeter detector according to a modified example of the present invention. 1... Measuring tube, 2... Electrode, 3... Lining, 4... Outer tube that also serves as core, 5... Excitation coil, 6
...Flange, 11, 12...Auxiliary core.
Claims (1)
ングされ流体を通ずる非磁性体製の測定管と、こ
の測定管の外径に合わせた内径を有する円筒面状
をなし前記１対の電極を結ぶ直線および測定管の
軸線を含む平面に面対称に測定管の外側に配置さ
れた１対の磁性体製の補助コアと、この補助コア
の外側に沿つて配置された１対の鞍状の励磁コイ
ルとを具備してなる電磁流量計検出器。 ２ 検出器の全長を口径とほぼ同じ長さとしたこ
とを特徴とする特許請求の範囲第１項記載の電磁
流量計検出器。 ３ 補助コアを珪素鋼板、鋼、純鉄、ダクタイル
鋳鉄等の磁性金属で作つたことを特徴とする特許
請求の範囲第１項記載の電磁流量計検出器。 ４ 補助コアをコイルで囲まれた励磁コイルの内
側空間にも配置したことを特徴とする特許請求の
範囲第１項記載の電磁流量計検出器。[Scope of Claims] 1. A measurement tube made of a non-magnetic material that has a pair of electrodes and whose inner wall is lined with an insulating material and allows fluid to pass therethrough, and a cylindrical surface having an inner diameter that matches the outer diameter of the measurement tube. a pair of auxiliary cores made of magnetic material arranged outside the measurement tube in plane symmetry with respect to a plane including the straight line connecting the pair of electrodes and the axis of the measurement tube; An electromagnetic flow meter detector comprising a pair of saddle-shaped excitation coils. 2. The electromagnetic flowmeter detector according to claim 1, characterized in that the entire length of the detector is approximately the same as the aperture. 3. The electromagnetic flowmeter detector according to claim 1, wherein the auxiliary core is made of a magnetic metal such as a silicon steel plate, steel, pure iron, or ductile cast iron. 4. The electromagnetic flow meter detector according to claim 1, characterized in that the auxiliary core is also arranged in the inner space of the excitation coil surrounded by the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3793182A JPS58155315A (en) | 1982-03-12 | 1982-03-12 | Detector for electromagnetic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3793182A JPS58155315A (en) | 1982-03-12 | 1982-03-12 | Detector for electromagnetic flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58155315A JPS58155315A (en) | 1983-09-16 |
| JPH0339243B2 true JPH0339243B2 (en) | 1991-06-13 |
Family
ID=12511294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3793182A Granted JPS58155315A (en) | 1982-03-12 | 1982-03-12 | Detector for electromagnetic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58155315A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10252041B4 (en) * | 2002-11-06 | 2005-02-17 | Siemens Flow Instruments A/S | Magnetically inductive flowmeter |
| JP2015105929A (en) * | 2013-12-02 | 2015-06-08 | 株式会社東芝 | Electromagnetic flow meter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745532Y2 (en) * | 1975-05-20 | 1982-10-07 |
-
1982
- 1982-03-12 JP JP3793182A patent/JPS58155315A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58155315A (en) | 1983-09-16 |
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