JPH0378627A - Meter tube with electronic circuit and manufacture thereof - Google Patents
Meter tube with electronic circuit and manufacture thereofInfo
- Publication number
- JPH0378627A JPH0378627A JP21534289A JP21534289A JPH0378627A JP H0378627 A JPH0378627 A JP H0378627A JP 21534289 A JP21534289 A JP 21534289A JP 21534289 A JP21534289 A JP 21534289A JP H0378627 A JPH0378627 A JP H0378627A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- electronic circuit
- coat
- insulating coat
- flame
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 239000000919 ceramic Substances 0.000 abstract description 7
- 150000002118 epoxides Chemical class 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract 2
- 239000007921 spray Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 241001576023 Chikunia Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
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に利用するに好適な流体を流すため
のメータチューブ、特にその外周に電子回路を実装した
メータチューブの改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a meter tube for flowing fluid suitable for use in an electromagnetic flowmeter, and particularly to an improvement of a meter tube having an electronic circuit mounted on its outer periphery.
純水や石油等のように導電率の低い流体を計測する安価
な電磁流量計として、流体を流すためのセラミックの管
の外側面に、電極近くに配置した能動素子を有する電気
回路を形成し、この電気回路で電極からの信号を受けて
処理すると共に、前記セラミックの管で電気回路の絶縁
基材を構成したものを出願人は先に実公平１−１９０５
４号公報で提案した。As an inexpensive electromagnetic flowmeter that measures fluids with low conductivity such as pure water and petroleum, an electric circuit with active elements placed near the electrodes is formed on the outside surface of a ceramic tube for flowing the fluid. This electric circuit receives and processes signals from the electrodes, and the ceramic tube constitutes an insulating base material for the electric circuit.
This was proposed in Publication No. 4.
この従来技術は、電極近くに能動素子を備えた電気回路
を配置して信号を処理するようにしているので、電極近
くでインピーダンス変換をすることが可能となり、電極
からみた増幅器の入力インピーダンスを大巾に高め、し
かも入力部の回路が小形にできるため、石油のような導
電度の低い流体の計測が可能になり、又ノイズが乗りに
くくなってＳ／Ｎ比が向上する効果がある。 又、管を
構成しているセラミックを回路の絶縁基材として用いる
ので、別に回路基板を要せず、小形で安価な電磁流量形
を実現できる効果があった。This conventional technology processes signals by arranging an electric circuit with active elements near the electrodes. This makes it possible to perform impedance conversion near the electrodes, which greatly increases the input impedance of the amplifier as seen from the electrodes. Since the width is increased and the input circuit can be made smaller, it is possible to measure fluids with low conductivity such as petroleum, and it is also effective in improving the S/N ratio by suppressing noise. Furthermore, since the ceramic constituting the tube is used as the insulating base material of the circuit, there is no need for a separate circuit board, which has the effect of realizing a small and inexpensive electromagnetic flow type.
前記従来技術はセラミックの管を用いているため耐衝撃
性が弱く、実用面で問題点となっていた。Since the conventional technology uses a ceramic tube, its impact resistance is weak, which is a problem in practical use.
そこで、本発明はか−る問題点を解消し、しかも従来技
術の利点を兼ね備えた、電磁流量計に用いるのに好適な
電子回路付メータチューブとその製造方法を提案するの
が目的である。SUMMARY OF THE INVENTION It is therefore an object of the present invention to propose a meter tube with an electronic circuit suitable for use in an electromagnetic flowmeter and a method for manufacturing the same, which solves these problems and also has the advantages of the prior art.
前記目的を達成するために、本発明の電子回路付メータ
チューブは、流体を流すための金属の管（１）と、管（
１）の外周に施した絶縁コート（２）と、該絶縁コート
の表面に形成した電子回路（３）と、前記管（１）の内
面に施した絶縁ライニング（６）とからなる。In order to achieve the above object, the meter tube with electronic circuit of the present invention includes a metal tube (1) for flowing fluid and a tube (1).
It consists of an insulating coat (2) applied to the outer periphery of the tube (1), an electronic circuit (3) formed on the surface of the insulating coat, and an insulating lining (6) applied to the inner surface of the tube (1).
そして本発明の電子回路付メータチューブの製造方法で
は、ＳＵＳ製の管（１）の外周に耐燃性の絶縁コート（
２）を溶射形成したあと、該絶縁コートの表面に厚膜印
刷回路を形成し、さらにその後で管（１）の内面に粉体
塗装による絶縁ライニング（６）を施すことを特徴とす
る。In the method for manufacturing a meter tube with an electronic circuit of the present invention, a flame-resistant insulating coat (
After thermal spraying 2), a thick film printed circuit is formed on the surface of the insulating coat, and then an insulating lining (6) is applied to the inner surface of the tube (1) by powder coating.
第１図乃至第３図の実施例において、ｌはＳＵＳ製の管
で、流体通路を構成する。 ２は管１の外周面にセラ
ミックを溶射して形成した耐燃性の絶縁コートでその表
面に厚膜印刷回路による電子回路３を形成している。
電子回路３は第２図に細部を示すように絶縁コート２の
表面に形成した厚膜印刷回路の配線４とその上に実装し
た能動素子や受動素子の表面実装用部品５からなるハイ
ブリッド集積回路である。 ６は管１の内面に施した
合成樹脂材料を用いた絶縁ライニングで、粉体塗装か、
別に設けた薄肉の絶縁チューブを管１内に挿入して形成
する。In the embodiment shown in FIGS. 1 to 3, l is a pipe made of SUS and constitutes a fluid passage. Reference numeral 2 denotes a flame-resistant insulating coat formed by thermally spraying ceramic on the outer peripheral surface of the tube 1, and an electronic circuit 3 made of a thick film printed circuit is formed on the surface thereof.
As shown in detail in FIG. 2, the electronic circuit 3 is a hybrid integrated circuit consisting of thick film printed circuit wiring 4 formed on the surface of the insulating coat 2 and surface mounting parts 5 such as active elements and passive elements mounted thereon. It is. 6 is an insulating lining made of synthetic resin material applied to the inner surface of tube 1, which may be powder coated or
It is formed by inserting a separately provided thin-walled insulating tube into the tube 1.
７は電磁流量計の電極、８は電極７を電子回路３の配線
４に接続するリード線である。7 is an electrode of the electromagnetic flowmeter, and 8 is a lead wire that connects the electrode 7 to the wiring 4 of the electronic circuit 3.
実施例の電子回路付メータチューブを製造するには、Ｓ
ＵＳ製の管１の外周面に先ずセラミックを溶射して耐燃
性の絶縁コート２を形成したあと、該絶縁コート２の表
面に厚膜印刷回路の配線４を形成焼成し、さらに表面実
装部品５を接着及び半田付で実装して電子回路３を形成
する。 さらにその後で管１の内面にフッ素樹脂チュー
ブを挿入或いはエポキシドフッ素樹脂を粉体塗装するこ
とにより絶縁ライニング６を施す。 最後に電極７を挿
入し、リード線８で配線４と接続し、電極７の信号を電
子回路３に入力する。To manufacture the meter tube with electronic circuit of the example, S
First, a flame-resistant insulating coat 2 is formed by thermal spraying ceramic on the outer circumferential surface of the US-made tube 1, and then a thick film printed circuit wiring 4 is formed and fired on the surface of the insulating coat 2, and then a surface mount component 5 is formed. are mounted by adhesive and soldering to form an electronic circuit 3. Thereafter, an insulating lining 6 is applied to the inner surface of the tube 1 by inserting a fluororesin tube or by powder coating with epoxide fluororesin. Finally, the electrode 7 is inserted, connected to the wiring 4 with a lead wire 8, and the signal from the electrode 7 is input to the electronic circuit 3.
絶縁コート２の材料としてはアルミナセラミック、チク
ニア、ガラス、ホーロー等を用いることができる。As the material of the insulating coat 2, alumina ceramic, chikunia, glass, enamel, etc. can be used.
〔発明の効果］
本発明では、金属の管（１）の外周に施した絶縁コート
（２）の表面に電子回路（３）を形成し、管（１）の内
面に絶縁ライニングを施したので、従来技術に比較して
管（１）の耐衝撃性が大巾に向上し、しかも従来技術の
利点はそのま＼継承できる。[Effects of the Invention] In the present invention, the electronic circuit (3) is formed on the surface of the insulating coat (2) applied to the outer periphery of the metal tube (1), and the insulating lining is applied to the inner surface of the tube (1). Compared to the prior art, the impact resistance of the tube (1) is greatly improved, and the advantages of the prior art can be inherited as is.
また、絶縁コート（２）を溶射形成したあと厚膜印刷に
よる配線（４）と表面実装部品（５）とで電子回路（３
）を形成し、さらにその後で管（１）の内面に粉体塗装
による絶縁ライニングを施するという順番で製造する方
法としたので、前工程で形成した絶縁コートや電子回路
が、後工程の加熱作業により破損する恐れがない。
（絶縁コート（２）を溶射する温度に比して印刷回路の
焼成温度が低（、印刷回路の焼成温度や半田付温度に比
し絶縁ライニングの粉体塗装温度及びチューブ挿入温度
はもっと低いため。）In addition, after thermally spraying an insulating coat (2), an electronic circuit (3) is formed by thick film printing wiring (4) and surface mount components (5).
), and then apply an insulating lining by powder coating to the inner surface of the tube (1), so that the insulating coat and electronic circuit formed in the previous process can be heated during the subsequent process. There is no risk of damage due to work.
(Compared to the temperature at which the insulation coating (2) is thermally sprayed, the firing temperature of the printed circuit is lower. Compared to the firing temperature and soldering temperature of the printed circuit, the powder coating temperature and tube insertion temperature of the insulation lining are lower.) .)
図面は本発明の実施例で、第１図は斜視図、第２図は流
れに平行な断面の一部、第３図は流れに直角な断面の一
部である。
ｌ・・・管、２・・・絶縁コート、３・・・電子回路、
６・・・絶縁ライニングThe drawings show an embodiment of the present invention; FIG. 1 is a perspective view, FIG. 2 is a part of a cross section parallel to the flow, and FIG. 3 is a part of a cross section perpendicular to the flow. l...tube, 2...insulation coat, 3...electronic circuit,
6...Insulating lining
Claims (1)
周に施した絶縁コート（２）と、該絶縁コートの表面に
形成した電子回路（３）と、前記管（１）の内面に施し
た絶縁ライニング（６）とからなる電子回路付メータチ
ューブ。 ２、ＳＵＳ製の管（１）の外周に耐燃性の絶縁コート（
２）を溶射形成したあと、該絶縁コートの表面に厚膜印
刷回路を形成し、さらにその後で管（１）の内面に粉体
塗装による絶縁ライニング（６）を施すことを特徴とす
る電子回路付メータチューブの製造方法。[Claims] 1. A metal tube (1) for flowing fluid, an insulating coat (2) applied to the outer periphery of the tube (1), and an electronic circuit (3) formed on the surface of the insulating coat. and an insulating lining (6) provided on the inner surface of the tube (1). 2. Apply a flame-resistant insulation coat (
2), a thick film printed circuit is formed on the surface of the insulating coat, and then an insulating lining (6) is applied by powder coating to the inner surface of the tube (1). Method of manufacturing a meter tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21534289A JPH0378627A (en) | 1989-08-21 | 1989-08-21 | Meter tube with electronic circuit and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21534289A JPH0378627A (en) | 1989-08-21 | 1989-08-21 | Meter tube with electronic circuit and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0378627A true JPH0378627A (en) | 1991-04-03 |
Family
ID=16670715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21534289A Pending JPH0378627A (en) | 1989-08-21 | 1989-08-21 | Meter tube with electronic circuit and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0378627A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9253961B2 (en) | 2003-07-11 | 2016-02-09 | The Clorox Company | Composite absorbent particles |
| US10071363B2 (en) | 2009-11-24 | 2018-09-11 | The Clorox Company | Non-visible activated carbon in absorbent materials |
-
1989
- 1989-08-21 JP JP21534289A patent/JPH0378627A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9253961B2 (en) | 2003-07-11 | 2016-02-09 | The Clorox Company | Composite absorbent particles |
| US10071363B2 (en) | 2009-11-24 | 2018-09-11 | The Clorox Company | Non-visible activated carbon in absorbent materials |
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