JPH047819B2 - - Google Patents
Info
- Publication number
- JPH047819B2 JPH047819B2 JP18970884A JP18970884A JPH047819B2 JP H047819 B2 JPH047819 B2 JP H047819B2 JP 18970884 A JP18970884 A JP 18970884A JP 18970884 A JP18970884 A JP 18970884A JP H047819 B2 JPH047819 B2 JP H047819B2
- Authority
- JP
- Japan
- Prior art keywords
- flow path
- adapter
- measured
- measuring tube
- flowmeter
- 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
Links
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】
〔産業上の利用分野〕
本発明は、微小口径流路を有する測定管を備え
た微小電磁流量計に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a microelectromagnetic flowmeter equipped with a measuring tube having a micro-diameter flow path.
従来、この種の微小電磁流量計は第６図に示す
ように構成されており、これを同図に基づいて説
明すると、１は口径が例えば2.5mmの流路２を有
する電磁流量計用の測定管で、軸線方向中央部に
電極取付用孔３が設けられており、両開口端面
４、流路壁２ａおよび電極取付用孔壁３ａ上には
テフロン等の絶縁ライニング５が設けられてい
る。
Conventionally, this type of micro-electromagnetic flowmeter has been constructed as shown in Fig. 6, and this will be explained based on the figure. The measuring tube is provided with an electrode mounting hole 3 in the central part in the axial direction, and an insulating lining 5 made of Teflon or the like is provided on both open end faces 4, the channel wall 2a, and the electrode mounting hole wall 3a. .
ところが、従来の微小電磁流量計においては、
測定管１の流路２が微小口径であるため、流路壁
２ａの全体に絶縁ライニング５を設ける作業をお
よびメンテナンスを煩雑にしていた。
However, in conventional microelectromagnetic flowmeters,
Since the flow path 2 of the measurement tube 1 has a minute diameter, the work of providing the insulating lining 5 over the entire flow path wall 2a and maintenance are complicated.
本発明にこのような事情に鑑みなされたもの
で、ライニング加工作業およびメンテナンスを容
易に行うことができる微小電磁流量計を提供する
ものである。 The present invention has been developed in view of these circumstances, and it is an object of the present invention to provide a microelectromagnetic flowmeter that allows easy lining processing and maintenance.
本発明に係る微小電磁流量計は、測定管の中央
内部に設けた被測定流体流路の両端に中央内部の
口径より大きい口径をもつ開口部を設け、これら
両開口部に被測定流体流路に連通する流路をもつ
アダプタを装着したものである。
The microelectromagnetic flowmeter according to the present invention has openings having a diameter larger than the diameter of the inside of the center at both ends of a fluid flow path to be measured provided inside the center of a measuring tube, and the fluid flow path to be measured is provided in both openings. It is equipped with an adapter that has a flow path that communicates with the
本発明においては、測定管の開口部スペースが
広くなる。
In the present invention, the opening space of the measuring tube is increased.
第１図は本発明に係る微小電磁流量計を示す部
分断面図、第２は同じく微小電磁流量計の測定管
を示す断面図である。同図において、符号１１で
示すものは電磁流量計用の測定管で、中央内部１
２に絶縁ライニング１３で形成された路壁面を有
する被測定流体流路１４が設けられている。この
流路１４の両端には前記中央内部１２の口径より
大きい口径をもつ開口部１５が設けられており、
この開口部１５と前記中央内部１２間には段部１
６が設けられている。また、測定管１１の中央部
には被測定流体流路１４内に開放する２つの電極
取付孔１７が設けられている。なお、被測定流体
流路１４は軸線方向の片側長さL1・L2，口径Ｄ
とすると、L1＝L2≧1.5Dの関係が成立するよう
に設計されることが望ましい。また、絶縁ライニ
ング１３は前記被測定流体流路１４の路壁面のみ
ならず前記電極取付孔１７の孔壁面と開口周縁お
よび前記段部１６にも樹脂モールド加工により設
けられている。１８は筒状のアダプタで、前記被
測定流体流路１４に連通する流路１９ａおよび一
端にフランジ１９ｂを有しテフロン、銅等の軟質
材料で形成された配管１９を挿通し前記開口部１
５に螺合されている。このアダプタ１８により配
管１９のフランジ１９ｂが前記段部１６上の絶縁
ライニング１３に圧接されている。２０は前記被
測定流体流路１４と同一軸線上に位置するアース
リングで、前記配管１９のフランジ１９ｂと前記
段部１６上の絶縁ライニング１３間に介装されて
いる。２１はフランジ２１ａを有する一対の電極
で、前記電極取付孔１４内に励磁コイル（図示せ
ず）で形成される磁界を介して互いに対向するよ
うに設けられている。また、２２は前記配管１９
が挿通するワツシヤで、配管１９のフランジ１９
ｂと前記アダプタ１８間に介装されている。
FIG. 1 is a partial sectional view showing a microelectromagnetic flowmeter according to the present invention, and FIG. 2 is a sectional view showing a measuring tube of the same micromagnetic flowmeter. In the same figure, the reference numeral 11 is a measurement tube for an electromagnetic flowmeter, and the center inner 1
A measured fluid flow path 14 having a path wall surface formed of an insulating lining 13 is provided at 2 . Openings 15 having a diameter larger than the diameter of the central interior 12 are provided at both ends of the flow path 14,
There is a step 1 between this opening 15 and the central interior 12.
6 is provided. Further, two electrode mounting holes 17 are provided in the center of the measurement tube 11 and open into the fluid flow path 14 to be measured. Note that the fluid flow path 14 to be measured has one side length L 1 and L 2 in the axial direction, and a diameter D.
Then, it is desirable to design so that the relationship L 1 =L 2 ≧1.5D holds. Further, the insulating lining 13 is provided not only on the wall surface of the fluid flow path 14 to be measured but also on the hole wall surface and opening periphery of the electrode mounting hole 17 and the step portion 16 by resin molding. Reference numeral 18 denotes a cylindrical adapter, which has a flow path 19a communicating with the fluid flow path 14 to be measured and a flange 19b at one end, and is inserted through the pipe 19 formed of a soft material such as Teflon or copper to the opening 1.
5 is screwed together. The adapter 18 presses the flange 19b of the pipe 19 against the insulating lining 13 on the stepped portion 16. Reference numeral 20 denotes an earth ring located on the same axis as the fluid flow path 14 to be measured, and is interposed between the flange 19b of the pipe 19 and the insulating lining 13 on the step portion 16. Reference numeral 21 denotes a pair of electrodes having flanges 21a, which are provided in the electrode mounting hole 14 so as to face each other via a magnetic field formed by an excitation coil (not shown). In addition, 22 is the pipe 19
is inserted into the flange 19 of the pipe 19.
b and the adapter 18.
このように構成された微小電磁流量計において
は、測定管１１にはその口径が中央内部１２の口
径より大きい開口部１５が形成されているため、
測定管１１の開口部スペースが広くなる。また、
アダプタ１８を開口部１５に螺合することにより
接続用の配管１９を測定管１１に直接接続するこ
とができる。さらに、アースリング２０の取付け
は、配管１９のフランジ１９ｂと段部１６上の絶
縁ライニング１３間にアースリング２０を介在さ
せるだけでよく、その取付作業を簡単に行うこと
ができる。 In the microelectromagnetic flowmeter configured in this way, the measurement tube 11 is formed with an opening 15 whose diameter is larger than that of the central interior 12.
The opening space of the measuring tube 11 becomes wider. Also,
By screwing the adapter 18 into the opening 15, the connecting pipe 19 can be directly connected to the measuring pipe 11. Furthermore, the attachment of the earthing ring 20 can be carried out simply by interposing the earthing ring 20 between the flange 19b of the pipe 19 and the insulating lining 13 on the stepped portion 16.
なお、本実施例においては、アダプタ１８を測
定管１１の開口内部１５に螺合により装着する例
を示したが、本発明はこれに限定されず、第３図
に示すようにテフロン製のアダプタ２３をスペー
サとして用い、これを測定管１１と共に接続用配
管２４のフランジ２４ａに挿通された通しボルト
２５の挾圧保持により接続用配管２４間に装着す
るものであつても実施例と同様の効果を奏する。
この場合、アースリング２０は爪部２０ａが測定
管１１と接触する構造であるが、第４図に示すよ
うにアースリング２６をアダプタ２７の押圧によ
り変形させ、この変形部分を測定管１１の段部１
６に接触させる構造でもよい。 In this embodiment, an example is shown in which the adapter 18 is screwed into the opening 15 of the measuring tube 11, but the present invention is not limited to this, and as shown in FIG. Even if 23 is used as a spacer and this is installed between the connecting pipes 24 by holding the pressure of the through bolt 25 inserted into the flange 24a of the connecting pipe 24 together with the measuring pipe 11, the same effect as in the embodiment can be obtained. play.
In this case, the earth ring 20 has a structure in which the claw portion 20a contacts the measuring tube 11, but as shown in FIG. Part 1
6 may be used.
また、実施例においては、絶縁ライニング１３
を樹脂モールド加工により所定の部位に設ける例
を示したが、本発明は樹脂コーテイング加工を用
いても勿論よい。この場合、絶縁ライニング１３
は第５図に破線で示す部位に設けられる。 Further, in the embodiment, the insulating lining 13
Although an example has been shown in which a resin molding process is used to provide a predetermined portion, the present invention may also use a resin coating process. In this case, the insulating lining 13
is provided at the location indicated by the broken line in FIG.
以上説明したように本発明によれば、測定管の
中央内部に被測定流体流路を設けると共に、この
流路の両端に中央内部の口径より大きい口径をも
つ開口部を設けたので、開口部スペースが広くな
り、精度の高いライニング加工作業およびメンテ
ナンスを容易に行うことができる。
As explained above, according to the present invention, a flow path for the fluid to be measured is provided inside the center of the measuring tube, and openings having a diameter larger than the inside diameter of the center are provided at both ends of the flow path. The space is larger, and highly accurate lining processing and maintenance can be performed easily.
第１図は本発明に係る微小電磁流量計を示す部
分断面図、第２図は同じく微小電磁流量計の測定
管を示す断面図、第３図は微小電磁流量計の他の
実施例を示す断面図、第４図はアースリングの他
の取付構造を示す断面図、第５図は他のライニン
グ加工を説明するための断面図、第６図は従来の
微小電磁流量計を示す断面図である。
１１……測定管、１２……中央内部、１３……
絶縁ライニング、１４……被測定流体流路、１５
……開口部、１８……アダプタ、１９……配管、
１９ａ……流路。
Fig. 1 is a partial sectional view showing a micro electromagnetic flowmeter according to the present invention, Fig. 2 is a sectional view showing a measurement tube of the micro electromagnetic flowmeter, and Fig. 3 shows another embodiment of the micro electromagnetic flowmeter. 4 is a sectional view showing another mounting structure for the earth ring, FIG. 5 is a sectional view for explaining other lining processing, and FIG. 6 is a sectional view showing a conventional microelectromagnetic flowmeter. be. 11...Measuring tube, 12...Central interior, 13...
Insulating lining, 14... Fluid flow path to be measured, 15
...opening, 18...adapter, 19...piping,
19a...Flow path.
Claims (1)
を有する被測定流体流路を設けると共に、この流
路の両端に前記中央内部の口径より大きい口径を
もつ開口部を設け、これら両開口部に前記被測定
流体流路に連通する流路をもつアダプタを装着し
たことを特徴とする微小電磁流量計。 ２ アダプタが螺合により装着されている特許請
求の範囲第１項記載の微小電磁流量計。 ３ アダプタが測定管と共に接続用配管間に挾圧
保持により装着されている特許請求の範囲第１項
記載の微小電磁流量計。[Scope of Claims] 1. A measuring tube for an electromagnetic flowmeter is provided with a flow path for the fluid to be measured having an insulated wall surface in the center thereof, and openings having a diameter larger than the diameter of the inside of the center are provided at both ends of the flow path. 1. A microelectromagnetic flowmeter characterized in that an adapter having a flow path communicating with the fluid flow path to be measured is attached to both of these openings. 2. The microelectromagnetic flowmeter according to claim 1, wherein the adapter is attached by screwing. 3. The micro-electromagnetic flowmeter according to claim 1, wherein the adapter is attached together with the measuring tube between the connecting pipes by holding a clamping pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18970884A JPS6168516A (en) | 1984-09-12 | 1984-09-12 | Fine electromagnetic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18970884A JPS6168516A (en) | 1984-09-12 | 1984-09-12 | Fine electromagnetic flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6168516A JPS6168516A (en) | 1986-04-08 |
| JPH047819B2 true JPH047819B2 (en) | 1992-02-13 |
Family
ID=16245861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18970884A Granted JPS6168516A (en) | 1984-09-12 | 1984-09-12 | Fine electromagnetic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6168516A (en) |
-
1984
- 1984-09-12 JP JP18970884A patent/JPS6168516A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6168516A (en) | 1986-04-08 |
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