JPH0612276B2 - Electromagnetic flowmeter and manufacturing method thereof - Google Patents
Electromagnetic flowmeter and manufacturing method thereofInfo
- Publication number
- JPH0612276B2 JPH0612276B2 JP8306288A JP8306288A JPH0612276B2 JP H0612276 B2 JPH0612276 B2 JP H0612276B2 JP 8306288 A JP8306288 A JP 8306288A JP 8306288 A JP8306288 A JP 8306288A JP H0612276 B2 JPH0612276 B2 JP H0612276B2
- Authority
- JP
- Japan
- Prior art keywords
- measuring tube
- outer peripheral
- peripheral surface
- exciting coil
- coil
- 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
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は電磁流量計およびその製造方法に関する。The present invention relates to an electromagnetic flow meter and a method for manufacturing the same.
電磁流量計はフアラデイの電磁誘導現象を利用して測定
管内を流れる導電性流体の流量を電気的に測定するもの
で、一般に第６図および第７図に示す如く構成されてい
る。すなわち、１は両端に接続配管用フランジ１a，１b
が一体に設けられ内周面全体に例えばテフロン，ネオプ
レン（いずれも商標名）等からなる絶縁ライニング２が
施された測定管で、この測定管１の外周面には管内の被
測定流体の流れ方向と直交する方向の磁界を発生させる
一対の励磁コイル３A，３Bが上下方向に対向して配設さ
れている。これらの励磁コイル３A，３Bはそれぞれ鞍形
に形成され、複数個例えば４つのバンド４と止めねじ５
によつて測定管１の外周面にボス１０を介して固定され
ている。ボス１１は測定管１の外周面に溶接固定され、
止めねじ５がねじ込まれるねじ孔を有している。前記バ
ンド４は金属板によつて略 形に折曲形成されて励磁コイル３A，３Bをまたぎ、その
表裏面全体が絶縁部材（図示せず）によつて被覆され、
さらに下面には絶縁紙９が介在されている。The electromagnetic flow meter electrically measures the flow rate of the conductive fluid flowing in the measuring tube by utilizing Faraday's electromagnetic induction phenomenon, and is generally constructed as shown in FIGS. 6 and 7. That is, 1 is a connecting pipe flange 1a, 1b at both ends.
Is integrally provided with an insulating lining 2 made of, for example, Teflon or neoprene (both are trade names) on the entire inner peripheral surface, and the flow of the fluid to be measured in the outer peripheral surface of the measuring tube 1 is measured. A pair of exciting coils 3A and 3B for generating a magnetic field in a direction orthogonal to the direction are arranged so as to face each other in the vertical direction. These exciting coils 3A and 3B are each formed in a saddle shape, and a plurality of, for example, four bands 4 and set screws 5 are provided.
Is fixed to the outer peripheral surface of the measuring tube 1 via the boss 10. The boss 11 is welded and fixed to the outer peripheral surface of the measuring pipe 1,
It has a screw hole into which the set screw 5 is screwed. The band 4 is generally made of a metal plate. Is formed into a bent shape, straddles the exciting coils 3A and 3B, and the entire front and back surfaces thereof are covered with an insulating member (not shown),
Further, an insulating paper 9 is interposed on the lower surface.
また、測定管１の管壁で長手方向中央部には前記被測定
流体の流れ方向と前記励磁コイル３Ａ，３Ｂによる磁界
の方向の双方に対して直交する一対の電極挿通孔（図示
せず）が左右に対向するよう貫通形成されており、これ
らの挿通孔に電極６A，６Bがそれぞれ取付けられ、その
内端面が測定管１内に臨んで接液面を形成している。両
電極６A，６B間に発生する電圧Ｅは、励磁コイル３A，
３Bによる管内の磁束密度（Ｂ）と、被測定流体の平均
流速（Ｖ）と、電極間距離(d)の積で表わされるため、
電圧Ｅを検知することで被測定流体の平均流速を測定す
ることができる。A pair of electrode insertion holes (not shown) are formed at the center of the tube wall of the measuring tube 1 in the longitudinal direction at right angles to both the flow direction of the fluid to be measured and the magnetic field direction of the exciting coils 3A and 3B. Are formed so as to face each other on the left and right, and electrodes 6A and 6B are attached to these insertion holes, respectively, and their inner end surfaces face the inside of the measuring tube 1 to form a liquid contact surface. The voltage E generated between the electrodes 6A and 6B is the exciting coil 3A,
3B is the product of the magnetic flux density (B) in the tube, the average flow velocity (V) of the fluid to be measured, and the inter-electrode distance (d).
By detecting the voltage E, the average flow velocity of the fluid to be measured can be measured.
７は円筒状に形成され励磁コイル３A，３Bの一部（もし
くは全体）を被うコアで、このコア７は測定管１の外周
面に止めねじ等の締結手段（図示せず）によつて固定さ
れている。８は励磁コイル３A，３B，電極６A，６Bおよ
びコア７を保護するケースである。A core 7 is formed in a cylindrical shape and covers a part (or the whole) of the exciting coils 3A and 3B. The core 7 is attached to the outer peripheral surface of the measuring tube 1 by fastening means (not shown) such as a set screw. It is fixed. Reference numeral 8 is a case for protecting the exciting coils 3A, 3B, the electrodes 6A, 6B and the core 7.
しかしながら、このような従来の電磁流量計において
は、複数個のバンド４と、これを固定するための止めね
じ５およびコア７を固定するための止めねじ等を必要と
するため、部品点数が多く、組付け時の作業性が著しく
悪いという問題点があつた。また、測定管１の曲率と励
磁コイル３Ａ，３Ｂの曲率が合つていないと、バンド４
で励磁コイル３A，３Bを押えても、バンド４による被押
圧部以外の部分が測定管１の外周面から浮いている場合
があり、励磁コイルを薄く作りたい要求に対して問題と
なつていた。また、励磁コイル３Ａ，３Ｂは測定管１の
外周面に沿うよう彎曲形成されているため、そのスプリ
ングバツクにより測定管１から浮き上り易く、このスプ
リングバツクの発生を完全に防止するため前記バンド４
の数を増加することも考えられるが、そうすると一層組
付け時の作業工数が増加する。However, such a conventional electromagnetic flowmeter requires a plurality of bands 4, a set screw 5 for fixing the bands 4, a set screw for fixing the core 7, and the like, and thus has a large number of parts. However, there was a problem that the workability during assembly was extremely poor. If the curvature of the measuring tube 1 does not match the curvature of the exciting coils 3A and 3B, the band 4
Even if the exciting coils 3A and 3B are pressed by, the part other than the pressed part by the band 4 may float from the outer peripheral surface of the measuring tube 1, which is a problem for the request to make the exciting coil thin. . Further, since the exciting coils 3A and 3B are curved so as to extend along the outer peripheral surface of the measuring tube 1, they are easily lifted up from the measuring tube 1 by the spring back thereof, and the band 4 is completely prevented in order to prevent the occurrence of the spring back.
It is also possible to increase the number of parts, but if this is done, the work man-hours during assembly will increase.
したがつて、本発明では上述したような問題点を解決
し、簡単な構造で励磁コイルを測定管の外壁に確実に固
定でき、部品点数および作業工数を節約し得る電磁流量
計およびその製造方法を提供することを目的とするもの
である。Therefore, in the present invention, the above-mentioned problems are solved, the exciting coil can be reliably fixed to the outer wall of the measuring tube with a simple structure, and the electromagnetic flowmeter and the manufacturing method thereof, which can save the number of parts and the number of working steps. It is intended to provide.
本発明に係る電磁流量計は上記目的を達成するために、
測定管と、この測定管の外周面に沿うよう彎曲形成され
該外周面に対向配置された一対の励磁コイルと、各励磁
コイルと前記測定管との間にそれぞれ介在された非磁性
体からなる一対のベースプレートと、前記各励磁コイル
の少なくとも一部表面を被い前記ベースプレートと共に
前記測定管の外周面に固定される一対の磁性体プレート
とを備え、前記励磁コイルと、当該コイルに対応する前
記ベースプレートおよび磁性体プレートの三者を絶縁被
膜材料によつてその表面全体を被い一体的に結合したも
のである。In order to achieve the above object, the electromagnetic flow meter according to the present invention,
It consists of a measuring tube, a pair of exciting coils curvedly formed along the outer peripheral surface of the measuring tube and arranged to face the outer peripheral surface, and a non-magnetic body interposed between each exciting coil and the measuring tube. A pair of base plates, and a pair of magnetic plates that cover at least a part of the surface of each exciting coil and are fixed to the outer peripheral surface of the measuring tube together with the base plate, the exciting coil, and the corresponding one of the coils. The base plate and the magnetic plate are covered with an insulating coating material over the entire surface thereof and integrally bonded.
また、本発明に係る電磁流量計の製造方法は、それぞれ
平板状に形成された磁性体プレート，励磁コイルおよび
ベースプレートをこの順序で雌型金型上に積層配置し、
次にこれら三部材を雄型金型により前記雌型金型の凹陥
部内に圧入して測定管の外周面に沿うよう彎曲形成し、
次いで前記三部材を雌型金型から取り出して溶融状態の
絶縁被膜材料中に浸漬し、しかる後前記絶縁被膜材料を
乾燥固化して前記三部材を一体化し、前記測定管の外周
面に固定するようにした。Further, in the method for manufacturing an electromagnetic flowmeter according to the present invention, a magnetic plate, an exciting coil, and a base plate, each formed in a flat plate shape, are laminated and arranged in this order on a female mold.
Next, these three members are press-fitted into the concave portion of the female die by a male die to form a curve along the outer peripheral surface of the measuring tube,
Next, the three members are taken out of the female mold and immersed in a molten insulating coating material, and then the insulating coating material is dried and solidified to integrate the three members and fixed to the outer peripheral surface of the measuring tube. I did it.
本発明による電磁流量計において、ベースプレートと磁
性体プレートは励磁コイルを挾持し、そのスプリングバ
ツクを防止する。In the electromagnetic flowmeter according to the present invention, the base plate and the magnetic plate hold the exciting coil to prevent the spring back thereof.
また、本発明による電磁流量計の製造方法は、ベースプ
レート，励磁コイルおよび磁性体プレートの三部材が絶
縁被膜材料によつて被覆されて一体的に結合されている
ので、測定管の外周面に同時に取付けられることとな
る。Further, in the method for manufacturing the electromagnetic flowmeter according to the present invention, since the three members of the base plate, the exciting coil and the magnetic plate are covered with the insulating coating material and integrally connected, the outer peripheral surface of the measuring tube is simultaneously connected. Will be installed.
以下、本発明の図面に示す実施例に基づいて詳細に説明
する。Hereinafter, a detailed description will be given based on an embodiment shown in the drawings of the present invention.
第１図は本発明に係る電磁流量計の一実施例を示す斜視
図、第２図は要部平面図、第３図は断面図である。な
お、図中第６図および第７図と同一構成部品，部分に対
しては同一符号を以つて示し、その説明を省略する。こ
れらの図において、本実施例は励磁コイル３Ａと、ベー
スプレート２０と磁性体プレート２１とを、絶縁被膜材
料２２によつて固めてコイルユニツト２３とし、このコ
イルユニツト２３を測定管１の外周面に複数個の締結手
段２４によつて固定したものである。FIG. 1 is a perspective view showing an embodiment of an electromagnetic flowmeter according to the present invention, FIG. 2 is a plan view of relevant parts, and FIG. 3 is a sectional view. The same components and parts as those in FIGS. 6 and 7 are designated by the same reference numerals, and the description thereof will be omitted. In these drawings, in this embodiment, the exciting coil 3A, the base plate 20 and the magnetic plate 21 are fixed by an insulating coating material 22 to form a coil unit 23, and this coil unit 23 is provided on the outer peripheral surface of the measuring tube 1. It is fixed by a plurality of fastening means 24.
前記ベースプレート２０はステンレス鋼等の非磁性体か
らなり、測定管１の外周面に密接するよう該外周面と略
同一の半径で彎曲形成され、その上に励磁コイル３Ａが
載置されている。前記励磁コイル３Ａは方形または矩形
に巻回されて前記ベースプレート２０の表面に密接する
よう円弧状に彎曲形成されることにより鞍形を呈してい
る。The base plate 20 is made of a non-magnetic material such as stainless steel, is curved with a radius substantially the same as the outer peripheral surface of the measuring tube 1 so as to be in close contact with the outer peripheral surface, and the exciting coil 3A is mounted thereon. The exciting coil 3A has a saddle shape by being wound in a rectangular shape or a rectangular shape and curved in an arc shape so as to be in close contact with the surface of the base plate 20.
前記磁性体プレート２１は軟鉄等によつて形成されるこ
とにより前記励磁コイル３Ａのアウタコアを構成するも
ので、前記ベースプレート２０の表面と略同一の半径で
円弧状に彎曲形成された中央彎曲基部21Ａと、この中央
彎曲基部21Ａの周方向両端部にそれぞれ一体に延設され
た略鉤形（Ｌ字形）のコイル固定部21Ｂ，21Ｃとで構成
されている。前記中央彎曲基部21Ａは励磁コイル３Ａの
中央開放部２５内に挿入されて前記ベースプレート２０
の表面に密接される。前記おコイル固定部21Ｂ，21Ｃ
は、前記励磁コイル３Ａの軸線方向に延在する直線部２
７の表面を被うもので、望ましくは該直接部２７を弾性
的に押圧するよう内側方向の偏奇習性を有している。The magnetic plate 21 constitutes the outer core of the exciting coil 3A by being formed of soft iron or the like, and has a central curved base portion 21A curved in an arc shape with a radius substantially the same as the surface of the base plate 20. And a substantially hook-shaped (L-shaped) coil fixing portion 21B, 21C integrally extending at both ends in the circumferential direction of the central curved base portion 21A. The central curved base portion 21A is inserted into the central open portion 25 of the exciting coil 3A so that the base plate 20
To be closely attached to the surface of. The coil fixing parts 21B, 21C
Is a linear portion 2 extending in the axial direction of the exciting coil 3A.
7, which has an inward eccentricity so as to elastically press the direct portion 27.
前記締結手段２４は、測定管１の外周面に突設され前記
ベースプレート２０および磁性体プレート２１に設けら
れた挿通孔（図示せず）に挿通される複数個、例えば４
個のスタツドボルト２８と、このスタツドボルト２８の
先端に螺合され前記ベースプレート２０および磁性体プ
レート２１を測定管１に共締め固定するナツト２９とで
構成されている。さらに前記ベースプレート２０の周方
向両端部は、上記と同様な締結手段３０（スタツドボル
ト30Ａとナツト30Ｂ）によつて前記測定管１に固定され
ている。A plurality of fastening means 24 are provided on the outer peripheral surface of the measuring tube 1 and are inserted into through holes (not shown) provided in the base plate 20 and the magnetic plate 21, for example, 4
It is composed of individual stud bolts 28, and nuts 29 screwed onto the tips of the stud bolts 28 to fix the base plate 20 and the magnetic plate 21 to the measuring tube 1 together. Further, both end portions in the circumferential direction of the base plate 20 are fixed to the measuring tube 1 by the fastening means 30 (stud bolts 30A and nuts 30B) similar to the above.
前記励磁コイル３Ａ，ベースプレート２０および磁性体
プレート２１の三部材を一体的に固める絶縁被膜材料２
２としては、例えば熱可塑性樹脂等が用いられ、本実施
例の場合ワニスが使用され、前記部材の表面全体を被
い、励磁コイル３Ａがばらばらになるのを防止すると共
に同コイル３Ａ，ベースプレート２０および磁性体プレ
ート２１のスプリングバツクを防止している。なお、第
１図および第３図においては絶縁被膜材料２２の図示を
省略している。Insulating film material 2 for integrally solidifying the three members of the exciting coil 3A, the base plate 20 and the magnetic plate 21
For example, a thermoplastic resin or the like is used as 2, and a varnish is used in the present embodiment to cover the entire surface of the member to prevent the exciting coil 3A from becoming disjointed and the coil 3A and the base plate 20. Also, the spring back of the magnetic plate 21 is prevented. The insulating coating material 22 is not shown in FIGS. 1 and 3.
前記コイルユニツト２３の製作に際しては、第４図に示
すように平板状に形成した磁性体プレート２１上に同じ
く平板状に巻回形成した励磁コイル３Ａを載せ、さらに
その上に平板状のベースプレート２０を載せ、これら三
部材を雌型金型３１上に設置して雄型金型３２により雌
型金型３１の凹陥部３３内に圧入して所定形状に同時に
彎曲し、しかる後これら三部材を凹陥部３３から取り出
してワニス液槽内に浸漬し、その後加熱炉に入れて所定
時間（１４〜１５時間）、一定温度（約150℃）で加熱
し、ワニスを固化させればよい。そして、このようにし
て製作されたコイルユニツト０２３を測定管１の外周面
に密接し、前記締結手段２４，３０によつて固定するこ
とによりコイルユニツト２３の取付けを完了する。When manufacturing the coil unit 23, as shown in FIG. 4, an exciting coil 3A, which is also wound in a flat plate shape, is placed on a magnetic plate 21 formed in a flat plate shape, and the flat plate-shaped base plate 20 is further placed thereon. , These three members are placed on the female mold 31, and the male mold 32 press-fits them into the concave portion 33 of the female mold 31 to simultaneously bend them into a predetermined shape. The varnish may be solidified by taking it out of the recess 33 and immersing it in a varnish bath, and then putting it in a heating furnace and heating it at a constant temperature (about 150 ° C.) for a predetermined time (14 to 15 hours). Then, the coil unit 023 manufactured in this manner is brought into close contact with the outer peripheral surface of the measuring tube 1 and fixed by the fastening means 24, 30 to complete the attachment of the coil unit 23.
前記測定管１の外周面に前記励磁コイル３Ａと対向する
ように配設されるもう一方の励磁コイル３Ｂについて
は、前記コイル３Ａと全く同様に製作されるため、その
説明を省略する。The other exciting coil 3B, which is arranged on the outer peripheral surface of the measuring tube 1 so as to face the exciting coil 3A, is manufactured in exactly the same manner as the coil 3A, and therefore its explanation is omitted.
かくしてこのような構成からなる電磁流量計によれば、
ベースプレート２０と磁性体プレート21とで励磁コイル
３Ａを挾持し、また磁性体プレート２１は前記コイル３
Ａのコアを兼用するので、部品点数を減少させ、しかも
前記三部材３Ａ，２０，２１はワニス等の絶縁被膜材料
２２によつて一体的に結合されているため、組付け工数
を節約し、組立作業性の向上並びにコスト低減を可能に
する。また、コイルユニツト２３は絶縁被膜材料２２に
よつて固められていることから、形状保持力が大で、そ
のスプリングバツクを防止し、測定管１の外周面から浮
き上ることが少なく、コイルの収納スペースを小さくす
る。Thus, according to the electromagnetic flowmeter having such a configuration,
The base plate 20 and the magnetic plate 21 sandwich the exciting coil 3A, and the magnetic plate 21 is the coil 3
Since it also serves as the core of A, the number of parts is reduced, and since the three members 3A, 20 and 21 are integrally joined by the insulating coating material 22 such as varnish, the number of assembling steps can be saved. Enables improvement of assembly workability and cost reduction. Further, since the coil unit 23 is hardened by the insulating coating material 22, the shape retaining force is large, the spring back is prevented, and the coil unit 23 does not float up from the outer peripheral surface of the measuring tube 1 so that the coil can be stored. Reduce the space.
第５図(a)，(b)は本発明の他の実施例を示す平面図およ
び断面図である。本実施例において磁性体プレート２１
は励磁コイル３Ａの表面全体を被うに十分な大きさを有
して、該表面との略同一の曲率で彎曲形成され、その周
方向両端部が励磁コイル３Ａの直線部２７の外側面に沿
つて折曲され、ベースプレート２０の周方向両端部表面
上に締結手段２４によつて固定されている。その他の構
成は上記実施例と同様である。5 (a) and 5 (b) are a plan view and a sectional view showing another embodiment of the present invention. In the present embodiment, the magnetic plate 21
Has a size large enough to cover the entire surface of the exciting coil 3A, and is curved with substantially the same curvature as the surface, and both ends in the circumferential direction are along the outer surface of the linear portion 27 of the exciting coil 3A. And is fixed by fastening means 24 on the circumferential end surfaces of the base plate 20. Other configurations are the same as those in the above embodiment.
このような構成においては磁性体プレート２１によりコ
イルユニツト２３の剛性が増大するため、一層形状保持
力が大で、励磁コイル３Ａのスプリングバツクをより確
実に防止し得るものである。In such a structure, the rigidity of the coil unit 23 is increased by the magnetic plate 21, so that the shape holding force is further increased and the spring back of the exciting coil 3A can be more reliably prevented.
なお、上記実施例はいずれも締結手段２４，３０によつ
てコイルユニツト２３を固定したが、これに限らず接着
剤を併用してもよいことは勿論である。In each of the above embodiments, the coil unit 23 is fixed by the fastening means 24 and 30, but the invention is not limited to this, and an adhesive may be used together.
以上説明したように本発明に係る電磁流量計によれば、
測定管の外周面に適合するよう彎曲形成された励磁コイ
ル，ベースプレートおよび磁性体プレートを絶縁被膜材
料によつて一体的に固めてユニツト化し、このユニツト
を測定管の外周面に固定するように構成したので、構造
が簡単で部品点数が少なく、そのため組立作業が容易か
つ迅速に行なえ、作業性を向上させる。また、コイルユ
ニツトは形状保持力が大で、励磁コイルのスプリングバ
ツクを防止し、コイルの収納スペースを小さくし得る。As described above, according to the electromagnetic flowmeter of the present invention,
The excitation coil, base plate and magnetic plate that are curved to fit the outer surface of the measuring tube are integrally fixed with an insulating coating material into a unit, and this unit is fixed to the outer surface of the measuring tube. Therefore, the structure is simple and the number of parts is small. Therefore, the assembling work can be performed easily and quickly, and the workability is improved. In addition, the coil unit has a large shape-retaining force, can prevent the spring back of the exciting coil, and can reduce the coil storage space.
また、本発明に係る製造方法においては、ベースプレー
ト，励磁コイルおよび磁性体プレートを積層配置し、こ
れら三者社を雄型金型と雌型金型により測定管の外周面
に沿うよう同時に彎曲形成するようにしているので、作
業の工程数を節約できる。Further, in the manufacturing method according to the present invention, the base plate, the exciting coil, and the magnetic plate are arranged in a laminated manner, and these three companies are simultaneously bent by a male die and a female die along the outer peripheral surface of the measuring tube. Therefore, the number of work steps can be saved.
第１図は本発明に係る電磁流量計の一実施例を示す外観
斜視図、第２図は要部平面図、第３図は断面図、第４図
はコイルユニツトの製造方法を説明するための図、第５
図(a)，(b)は本発明の他の実施例を示す要部平面図、断
面図、第６図および第７図は従来の電磁流量計を示す断
面図および斜視図である。 １……測定管、２……ライニング、３A，３B……励磁コ
イル、４……バンド、６A，６B……電極、７……コア、
８……ケース、２０……ベースプレート、２１……磁性
体プレート、２２……絶縁被膜材料、２３……コイルユ
ニツト、２４，３０……締結手段、３１……雌型金型、
３２……雄型金型。FIG. 1 is an external perspective view showing an embodiment of an electromagnetic flowmeter according to the present invention, FIG. 2 is a plan view of an essential part, FIG. 3 is a sectional view, and FIG. 4 is for explaining a manufacturing method of a coil unit. Figure, No. 5
FIGS. (A) and (b) are a plan view, a sectional view, and FIGS. 6 and 7 of a main part of another embodiment of the present invention, which are a sectional view and a perspective view showing a conventional electromagnetic flowmeter. 1 ... Measuring tube, 2 ... Lining, 3A, 3B ... Exciting coil, 4 ... Band, 6A, 6B ... Electrode, 7 ... Core,
8 ... Case, 20 ... Base plate, 21 ... Magnetic plate, 22 ... Insulating film material, 23 ... Coil unit, 24, 30 ... Fastening means, 31 ... Female mold,
32 ... Male mold.
Claims (2)
彎曲形成され該外周面に対向配置された一対の励磁コイ
ルと、各励磁コイルと前記測定管との間にそれぞれ介在
された非磁性体からなる一対のベースプレートと、前記
各励磁コイルの少なくとも一部表面を被い前記ベースプ
レートと共に前記測定管の外周面に固定される一対の磁
性体プレートとを備え、前記励磁コイルと、当該コイル
に対応する前記ベースプレートおよび磁性体プレートの
三者を絶縁被膜材料によつてその表面全体を被い一体的
に結合したことを特徴とする電磁流量計。1. A measuring tube, a pair of exciting coils curvedly formed along the outer peripheral surface of the measuring tube and arranged to face the outer peripheral surface, and interposed between each exciting coil and the measuring tube. A pair of base plates made of a non-magnetic material, and a pair of magnetic plates that cover at least a part of the surface of each exciting coil and are fixed to the outer peripheral surface of the measuring tube together with the base plate, the exciting coil, and An electromagnetic flow meter characterized in that the base plate and the magnetic plate corresponding to the coil are integrally covered with an insulating coating material over the entire surface thereof.
ト，励磁コイルおよびベースプレートを、この順序で雌
型金型上に積層配置し、次にこれら三部材を雄型金型に
より前記雌型金型の凹陥部内に圧入して測定管の外周面
に沿うよう彎曲形成し、次いで前記三部材を雌型金型か
ら取り出して溶融状態の絶縁被膜材料中に浸漬し、しか
る後前記絶縁被膜材料を乾燥固化して前記三部材を一体
化し、前記測定管の外周面に固定するようにしたことを
特徴とする電磁流量計の製造方法。2. A magnetic plate, an exciting coil, and a base plate, each of which is formed in a flat plate shape, are laminated on a female mold in this order, and then these three members are laminated by a male mold to the female mold. It is press-fitted into the concave portion of the mold to form a curve along the outer peripheral surface of the measuring tube, then the three members are taken out of the female mold and immersed in a molten insulating coating material, and then the insulating coating material is removed. A method for manufacturing an electromagnetic flowmeter, characterized in that it is dried and solidified to integrate the three members and fixed to the outer peripheral surface of the measuring tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8306288A JPH0612276B2 (en) | 1988-04-06 | 1988-04-06 | Electromagnetic flowmeter and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8306288A JPH0612276B2 (en) | 1988-04-06 | 1988-04-06 | Electromagnetic flowmeter and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01257220A JPH01257220A (en) | 1989-10-13 |
| JPH0612276B2 true JPH0612276B2 (en) | 1994-02-16 |
Family
ID=13791701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8306288A Expired - Lifetime JPH0612276B2 (en) | 1988-04-06 | 1988-04-06 | Electromagnetic flowmeter and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612276B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5344234B2 (en) * | 2008-06-26 | 2013-11-20 | 横河電機株式会社 | Electromagnetic flow meter |
| JP6413681B2 (en) * | 2014-11-17 | 2018-10-31 | 横河電機株式会社 | Electromagnetic flow meter |
-
1988
- 1988-04-06 JP JP8306288A patent/JPH0612276B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01257220A (en) | 1989-10-13 |
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