JPH0331372B2 - - Google Patents
Info
- Publication number
- JPH0331372B2 JPH0331372B2 JP58190456A JP19045683A JPH0331372B2 JP H0331372 B2 JPH0331372 B2 JP H0331372B2 JP 58190456 A JP58190456 A JP 58190456A JP 19045683 A JP19045683 A JP 19045683A JP H0331372 B2 JPH0331372 B2 JP H0331372B2
- Authority
- JP
- Japan
- Prior art keywords
- vortex
- magnetic body
- magnet
- gravity
- detector
- 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
- 230000005484 gravity Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 239000000696 magnetic material Substances 0.000 description 9
- 230000035945 sensitivity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010079 rubber tapping 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
- G01F1/05—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 mechanical effects
- G01F1/20—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 mechanical effects by detection of dynamic effects of the flow
- G01F1/32—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 mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
- G01F1/325—Means for detecting quantities used as proxy variables for swirl
- G01F1/3259—Means for detecting quantities used as proxy variables for swirl for detecting fluid pressure oscillations
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
Description
【発明の詳細な説明】
技術分野
本発明は、渦流量計に係り、特に、渦による変
動圧力により駆動される渦発生体内に配設された
磁性体の変位を磁束の変化として磁気的に検出す
る渦流量計において、上記磁性体の変位を検出す
る検出器を該磁性体の下方に取付けた場合に、該
磁性体が検出器の磁石により下方に吸収されて検
出感度が低下するのを防止するようにした渦流量
計に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a vortex flowmeter, and particularly to a method for magnetically detecting the displacement of a magnetic body disposed within a vortex generator driven by fluctuating pressure caused by a vortex as a change in magnetic flux. In a vortex flow meter that detects the displacement of the magnetic body, when the detector for detecting the displacement of the magnetic body is installed below the magnetic body, the magnetic body is prevented from being absorbed downward by the magnet of the detector and the detection sensitivity decreases. This invention relates to a vortex flow meter designed to perform.
従来技術
渦流量計の渦信号を磁気的に検出する場合、渦
発生体両側面に発生する変動差圧を渦発生体内に
導入して磁性体を上下に変位させ、この変位を磁
気的に例えばリラクタンスの変化として検出する
渦流量計は周知である。このような磁気的検出方
法においては、検出器は通常渦発生体の上方に取
付けられているが、その場合、磁性体は検出器に
内蔵されている磁石により常に上方に吸引されて
いる。そして、この吸引力が磁性体の重力を釣合
つているときが最も感度が高くなる。しかし流路
管が天井近傍にあつたり、高温液体、極低温液体
の流路に流量計が配設されている場合に磁性体を
変換するときは、ホツトタツピングによつて外部
に取り出さなければならない。従つて、このよう
な場合は、流量計取付状態においては検出器を下
方に配置した方が好都合である。しかしながら、
検出器を下方に取付けると、磁性体には検出器の
磁石による吸引力が重力に加算されるため、渦差
圧がこれらの力に打勝つまで磁性体が変位しない
ので感度流量が大きくなり、流量適用範囲が小さ
くなる。Prior Art When detecting the vortex signal of a vortex flowmeter magnetically, a fluctuating differential pressure generated on both sides of the vortex generator is introduced into the vortex generator to displace the magnetic body up and down, and this displacement is magnetically detected, for example. Vortex flowmeters that detect changes in reluctance are well known. In such magnetic detection methods, the detector is usually mounted above the vortex generator, and in that case, the magnetic body is always attracted upward by a magnet built into the detector. Sensitivity is highest when this attractive force balances the gravity of the magnetic material. However, when the flow pipe is near the ceiling or a flow meter is installed in the flow path for high-temperature liquid or cryogenic liquid, when converting the magnetic material, it is necessary to take it out to the outside by hot tapping. Therefore, in such a case, it is more convenient to place the detector at the bottom when the flowmeter is installed. however,
When the detector is mounted downward, the magnetic body will have an attractive force due to the detector's magnet added to the gravity, so the magnetic body will not be displaced until the vortex differential pressure overcomes these forces, increasing the sensitivity flow rate. Flow rate application range becomes smaller.
目 的
本発明は、上述のごとき問題点を解決するため
になされたもので、特に、磁性体の上方に、該磁
性体を吸引して重力と平衡させる磁石を配設する
ことにより、通常の場合と同様の流量感度を得る
ようにしたものである。Purpose The present invention was made in order to solve the above-mentioned problems, and in particular, by disposing a magnet above a magnetic body to attract the magnetic body and balance it with gravity, it is possible to solve the problems described above. This is to obtain the same flow sensitivity as in the case.
構 成
第１図は、本発明による渦流量計の一実施例を
説明するための断面構成図で、図中、１は流路
管、２は渦発生体、３及び４は該渦発生体２に設
けられた渦変動圧導入孔、５はこれら渦変動圧導
入孔３，４と連通して渦発生体２の軸方向に穿孔
された空室６内に摺動可能に配設された磁性体、
７は該磁性体５を重力に逆つて上方に吸引するた
めの永久磁石、８は前記磁性体５の変動を検出す
るための検出器で、該検出器８は、磁石９、継鉄
１０、該継鉄１０上に巻回されたコイル１１、及
び、出力リード線１２等より成つている。Configuration FIG. 1 is a cross-sectional configuration diagram for explaining one embodiment of a vortex flowmeter according to the present invention, in which 1 is a flow pipe, 2 is a vortex generator, and 3 and 4 are the vortex generators. A vortex variable pressure introduction hole 5 provided in 2 is slidably disposed in a cavity 6 bored in the axial direction of the vortex generator 2 in communication with these vortex variable pressure introduction holes 3 and 4. magnetic material,
7 is a permanent magnet for attracting the magnetic body 5 upward against gravity; 8 is a detector for detecting fluctuations in the magnetic body 5; the detector 8 includes a magnet 9, a yoke 10, It consists of a coil 11 wound on the yoke 10, an output lead wire 12, etc.
而して、本発明においては、検出器８を磁性体
５の下方に取り付けるようにしたので、磁性体を
変換する時の作業が非常に簡素化され、しかも、
永久磁石７によつて磁性体５を重力及び検出器側
の永久磁石９による吸引力に逆つて上方に吸引す
るようにしているので、感度流量が大きくなるよ
うなことはなく、従つて、計量適用範囲が狭くな
るようなことはない。 Therefore, in the present invention, since the detector 8 is attached below the magnetic body 5, the work when converting the magnetic body is greatly simplified, and moreover,
Since the magnetic material 5 is attracted upward by the permanent magnet 7 against the gravity and the attraction force by the permanent magnet 9 on the detector side, the sensitivity flow rate does not increase, and therefore the measurement The scope of application will not be narrowed.
第２図は、本発明の他の実施例を説明するため
の構成図、第３図は第２図のＡ部拡大図で、図
中、２０は棒状体、２１はボールバルブ、２２は
バルブハンドル、２３はパツキン、２４はねじ
部、２５はハンドルで、その他第１図と同様の作
用をする部分には、第１図の場合と同一の参照番
号が付してある。而して、この実施例において
は、渦発生体２の軸方向に空室が穿孔されるとと
もに、該空室内に、渦変動圧力により変位する磁
性体５と該磁性体５を吸引して重力と平衡させる
ための永久磁石７を一体的に有する棒状体２０が
液密に挿入、挿出可能に配設されており、磁性体
交換時、該棒状体を引き抜き、引き抜いた後にボ
ールバルブ２１を閉じるようにしたもので、これ
によつて、磁性体の交換作業を容易に行い得るよ
うにしている。 FIG. 2 is a configuration diagram for explaining another embodiment of the present invention, and FIG. 3 is an enlarged view of part A in FIG. 2, in which 20 is a rod-shaped body, 21 is a ball valve, and 22 is a valve The handle, 23 is a gasket, 24 is a threaded portion, 25 is a handle, and other parts having the same functions as in FIG. 1 are given the same reference numerals as in FIG. 1. In this embodiment, a cavity is bored in the axial direction of the vortex generating body 2, and the magnetic body 5, which is displaced by the vortex fluctuating pressure, is attracted into the cavity to generate gravity. A rod-shaped body 20, which integrally has a permanent magnet 7 for balancing the magnetic material, is disposed so that it can be inserted and removed in a liquid-tight manner.When replacing the magnetic body, the rod-shaped body 20 is pulled out, and after being pulled out, the ball valve 21 is opened. This allows the magnetic body to be replaced easily.
効 果
以上の説明から明らかなように、本発明による
と、検出器を磁性体の下方に配設し得るようにし
たので、磁性体交換時の作業が非常に楽になり、
しかも、磁性体に作用する重力の影響を効果的に
補償したので、計測精度を損うことなく、また、
計量適用範囲を狭くするようなこともない。Effects As is clear from the above explanation, according to the present invention, since the detector can be disposed below the magnetic material, the work when replacing the magnetic material is greatly facilitated.
Moreover, since it effectively compensates for the influence of gravity acting on the magnetic material, it does not impair measurement accuracy.
There is no need to narrow the scope of measurement.
第１図及び第２図は、それぞれ本発明の実施例
を説明するための断面構成図、第３図は、第２図
のＡ部拡大図である。
１……流路管、２……渦発生体、３，４……渦
変動圧導入口、５……磁性体、６……空室、７…
…磁石、８……検出器、２０……棒状体。
1 and 2 are cross-sectional configuration diagrams for explaining embodiments of the present invention, respectively, and FIG. 3 is an enlarged view of section A in FIG. 2. DESCRIPTION OF SYMBOLS 1... Channel pipe, 2... Vortex generator, 3, 4... Vortex variable pressure inlet, 5... Magnetic material, 6... Empty chamber, 7...
... Magnet, 8... Detector, 20... Rod-shaped body.
Claims (1)
体の軸方向に穿孔された空室内に摺動可能に配設
された磁性体の渦変動圧力による変位を上記磁性
体の下方に配設された検出器で流量に比例した振
動数に変換して流量を求める渦流量計において、
上記磁性体上方に該磁性体を吸引して重力平衡さ
せるため磁石を配設したことを特徴とする渦流量
計。 ２ 渦変動圧力により変位する磁性体と、この磁
性体を吸引して重力平衡する磁石とを棒状体に一
体的に配置し、該棒状体を渦発生体の軸方向に穿
孔された空室内に液密に挿入、挿出可能としたこ
とを特徴とする特許請求の範囲第１項に記載の渦
流量計。[Scope of Claims] 1. Displacement due to vortex fluctuation pressure of a magnetic body slidably disposed in a cavity bored in the axial direction of a vortex generator disposed in a flow path opposite to the flow. In a vortex flowmeter that calculates the flow rate by converting it into a frequency proportional to the flow rate using a detector placed below the magnetic body,
A vortex flowmeter characterized in that a magnet is disposed above the magnetic body to attract the magnetic body and balance the magnetic body with gravity. 2. A magnetic body that is displaced by vortex fluctuating pressure and a magnet that attracts this magnetic body and balances its gravity are integrally arranged in a rod-shaped body, and the rod-shaped body is placed in a cavity bored in the axial direction of the vortex generating body. The vortex flowmeter according to claim 1, wherein the vortex flowmeter can be inserted and removed in a liquid-tight manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58190456A JPS6082812A (en) | 1983-10-12 | 1983-10-12 | Vortex flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58190456A JPS6082812A (en) | 1983-10-12 | 1983-10-12 | Vortex flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6082812A JPS6082812A (en) | 1985-05-11 |
| JPH0331372B2 true JPH0331372B2 (en) | 1991-05-02 |
Family
ID=16258421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58190456A Granted JPS6082812A (en) | 1983-10-12 | 1983-10-12 | Vortex flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6082812A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59203846D1 (en) * | 1992-02-27 | 1995-11-02 | Flowtec Ag | Vortex flow meter. |
-
1983
- 1983-10-12 JP JP58190456A patent/JPS6082812A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6082812A (en) | 1985-05-11 |
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