JPH055641A - Volumetric flowmeter - Google Patents

Volumetric flowmeter

Info

Publication number
JPH055641A
JPH055641A JP15865891A JP15865891A JPH055641A JP H055641 A JPH055641 A JP H055641A JP 15865891 A JP15865891 A JP 15865891A JP 15865891 A JP15865891 A JP 15865891A JP H055641 A JPH055641 A JP H055641A
Authority
JP
Japan
Prior art keywords
light
optical
casing
flow rate
optical fiber
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
Application number
JP15865891A
Other languages
Japanese (ja)
Inventor
Tokuyuki Achinami
徳 幸 阿知波
Masanobu Yamaguchi
口 政 信 山
Toichi Watanabe
辺 東 一 渡
Takatoshi Okuda
田 高 稔 奥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trinity Industrial Corp
Original Assignee
Trinity Industrial Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Trinity Industrial Corp filed Critical Trinity Industrial Corp
Priority to JP15865891A priority Critical patent/JPH055641A/en
Publication of JPH055641A publication Critical patent/JPH055641A/en
Pending legal-status Critical Current

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  • Measuring Volume Flow (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE:To obtain a volumetric flowmeter which can measure the flow rate of a fluid in a state where the flowmeter is not brought into contact with a mobile section that makes rotation or reciprocating motions in a casing set in the flow passage of the fluid and safely detect the flow rate even in a high- voltage zone. CONSTITUTION:The whole body or part of a mobile section 5 is formed of a light transmissive body 8 which passes light from one wall side to the other wall side of a casing 4 in which the mobile section 5 is incorporated. A light transmitting system EO and light receiving system OE which transmits and receives light through the transmissive body 8 are provided at locations which the transmissive body 8 intermittently passes through.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ケーシング内の空間部
に流体を充満させては送り出す作動を連続的に行って流
量を検出する容積式流量計に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positive displacement flow meter for detecting a flow rate by continuously performing an operation of filling a space in a casing with a fluid and sending the fluid.

【0002】[0002]

【従来の技術】容積式流量計は、流体の流路に介装され
るケーシング内に設けた可動部が回転又は往復動してケ
ーシング内の空間部に充満する流体を連続的に送り出
し、その送り出し回数を計数して流量を求めるようにな
っており、可動部の構造の違いよってオーバル歯車式、
ルーツ式、フローティングロータ式、ロータリーピスト
ン式、スライドベーン式などの各種がある。
2. Description of the Related Art In a positive displacement type flow meter, a movable part provided in a casing interposed in a fluid passage rotates or reciprocates to continuously send out a fluid filling a space in the casing. It is designed to calculate the flow rate by counting the number of feeds, and depending on the difference in the structure of the movable part, the oval gear type,
There are various types such as roots type, floating rotor type, rotary piston type and slide vane type.

【0003】また、計量方法には、可動部を回転自在に
支持する回転シャフトの軸端や、可動部の往復運動を回
転運動に変換する回転クランクシャフトの軸端に、これ
らシャフトの回転数を計数する計数部を設けたり、ある
いは、その軸端や回転する可動部に磁性体を取り付け、
当該磁性体の回転により磁束密度が変化して誘導起電圧
を発生するピックアップコイルで得られた電気パルス信
号を計数部に伝送する方法が知られている。
Further, in the measuring method, the rotational speeds of these shafts are set at the shaft end of a rotary shaft that rotatably supports the movable part and the shaft end of a rotary crankshaft that converts the reciprocating motion of the movable part into rotary motion. Provide a counting unit to count, or attach a magnetic body to its shaft end or rotating movable part,
A method is known in which an electric pulse signal obtained by a pickup coil that generates an induced electromotive voltage by changing magnetic flux density due to rotation of the magnetic body is transmitted to a counting unit.

【0004】[0004]

【発明が解決しようとする課題】しかし、これらの流量
計は、高電圧ゾーンで安全に使用することができず、例
えば80〜120KVもの高電圧が印加された静電塗装
機の間近で塗料の流量を検出する場合は、その塗装機に
印加した高電圧が流量計に直接リークして、流量計の電
気系統が破壊される危険がある。また、静電塗装機に水
系塗料やメタリック塗料等の導電性塗料を供給する塗料
配管に介装された流量計は、静電塗装機から遠く離れて
いても、その塗装機に印加した高電圧が塗料配管内の導
電性塗料を通じてリークするおそれがある。そこで本発
明は、高電圧ゾーンでも安全に使用可能な容積式流量計
を提供することを主たる技術的課題としている。
However, these flowmeters cannot be used safely in the high voltage zone and, for example, when the paint is applied in the vicinity of an electrostatic coating machine to which a high voltage of 80 to 120 KV is applied. When detecting the flow rate, there is a risk that the high voltage applied to the coating machine directly leaks to the flow meter and the electrical system of the flow meter is destroyed. In addition, the flowmeter installed in the paint pipe that supplies conductive paint such as water-based paint or metallic paint to the electrostatic coating machine is high voltage applied to the coating machine even if it is far from the electrostatic coating machine. May leak through the conductive paint in the paint pipe. Therefore, the main object of the present invention is to provide a positive displacement flow meter that can be safely used even in a high voltage zone.

【0005】[0005]

【課題を解決するための手段】この課題を解決するため
に、本発明による容積式流量計は、流体の流路に介装さ
れるケーシング内で回転又は往復動してそのケーシング
内の空間部に充満する流体を連続的に送り出す可動部の
全体又はその一部が、当該可動部を挟んで対向する前記
ケーシングの片壁側から他壁側へ光を透過させる透光体
で形成され、当該透光体が断続的に通過又は到来する位
置でその透光体を通じて光を送受する光送信系と光受信
系が設けられていることを特徴とする。
In order to solve this problem, a positive displacement type flow meter according to the present invention rotates or reciprocates in a casing interposed in a fluid flow path to cause a space in the casing. The whole or a part of the movable portion that continuously sends out the fluid filled in the casing is formed of a light-transmitting body that transmits light from one wall side to the other wall side of the casing that faces the casing with the movable portion interposed therebetween. It is characterized in that an optical transmission system and an optical reception system for transmitting and receiving light through the transparent body are provided at positions where the transparent body intermittently passes or arrives.

【0006】[0006]

【作用】本発明によれば、ケーシング内で可動部が回転
又は往復動すると、その可動部の全体又は一部を成す透
光体が、当該透光体を通じて光を送受する光送信系と光
受信系との間を流体の流量に比例した速度で断続的に通
過又は到来して、光送信系と光受信系との間では、少な
くとも透光体が通過又は到来した時に必ず光の送受が行
われる。
According to the present invention, when the movable part rotates or reciprocates in the casing, the light-transmitting body forming the whole or a part of the movable part transmits and receives light through the light-transmitting body and the light transmitting system. Light is transmitted or received intermittently at a speed proportional to the flow rate of the fluid with the receiving system, and at least when the translucent body passes or arrives at least between the optical transmitting system and the optical receiving system. Done.

【0007】例えば、顔料塗料等の光を透過しない流体
によって可動部が回転又は往復動する場合は、その可動
部の全体又は一部に形成された透光体が通過又は到来し
た時だけ光送信系と光受信系との間で光が送受される。
また、クリアー塗料や水等の光を透過する流体によって
可動部が回転又は往復動する場合は、その可動部の一部
に形成された透光体が通過又は到来した時と、その可動
部の透光体以外の部分が通過又は到来しない時に限っ
て、光送信系と光受信系との間で光が送受される。これ
により、光送信系と光受信系との間で送受する光が可動
部の回転速度や往復速度に応じた所定のタイミングで断
続されて、光受信系からは流体の流量に比例した光パル
スが取り出される。
For example, when the movable portion is rotated or reciprocally moved by a fluid that does not transmit light, such as a pigment paint, optical transmission is performed only when a light-transmitting body formed on all or part of the movable portion passes or arrives. Light is transmitted and received between the system and the light receiving system.
In addition, when the movable portion is rotated or reciprocated by a fluid that transmits light, such as clear paint or water, when the translucent body formed in a part of the movable portion passes or arrives, Light is transmitted and received between the optical transmission system and the optical reception system only when a portion other than the translucent body does not pass or arrive. As a result, light transmitted and received between the optical transmission system and the optical reception system is interrupted at a predetermined timing according to the rotation speed and reciprocating speed of the movable part, and the optical pulse is proportional to the flow rate of the fluid from the optical reception system. Is taken out.

【0008】したがって、その光受信系で取り出した光
パルス列の周期あるいは周波数を光/電気変換素子等を
有した回転検出器で計測すれば、ケーシング内で流体の
流量に応じて回転又は往復動する可動部の回転速度・往
復速度をケーシングの外部から非接触で検出することが
できる。また、光送信系と光受信系は、電気/光変換素
子と光/電気変換素子で直接的に光を送受してもよい
が、その間に送光用光ファイバと受光用光ファイバを介
して光を送受すれば、流量計を高電圧ゾーン等に設けて
も電気/光変換素子や光/電気変換素子等を有した電気
系統に高電圧がリークするおそれがないから、静電塗装
機に供給される塗料の流量を検出する塗料流量計として
最適であり、また、ガソリン等の可燃性物質の流量を検
出する防爆流量計としてもそのまま使用することができ
る。
Therefore, if the period or frequency of the optical pulse train extracted by the optical receiving system is measured by a rotation detector having an optical / electrical conversion element or the like, it rotates or reciprocates in the casing according to the flow rate of the fluid. The rotation speed and reciprocating speed of the movable part can be detected from the outside of the casing without contact. Further, the optical transmission system and the optical reception system may directly transmit and receive light by the electric / optical conversion element and the optical / electrical conversion element, but in the meantime, through the optical fiber for light transmission and the optical fiber for light reception. If light is transmitted and received, even if a flow meter is installed in a high voltage zone or the like, there is no risk of high voltage leaking to the electrical system that has an electrical / optical conversion element or an optical / electrical conversion element. It is most suitable as a paint flow meter for detecting the flow rate of the supplied paint, and can also be used as it is as an explosion-proof flow meter for detecting the flow rate of combustible substances such as gasoline.

【0009】[0009]

【実施例】以下、本発明の実施例を図面によって具体的
に説明する。図1は本発明による容積式流量計の第一実
施例を示す斜視図、図2はその部分断面図、図3はその
使用状態を示すフローシート図、図4は本発明の第二実
施例を示す要部の斜視図、図5は本発明の第三実施例を
示す要部の斜視図、図6はその使用状態を示すフローシ
ート図、図7は本発明の第四実施例を示す平面図、図8
は本発明の第五実施例を示す平面図、図9はその斜視図
である。
Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of a positive displacement flow meter according to the present invention, FIG. 2 is a partial cross-sectional view thereof, FIG. 3 is a flow sheet diagram showing its usage, and FIG. 4 is a second embodiment of the present invention. FIG. 5 is a perspective view of a main part showing a third embodiment of the present invention, FIG. 6 is a flow sheet diagram showing its use state, and FIG. 7 is a fourth embodiment of the present invention. Plan view, FIG.
Is a plan view showing a fifth embodiment of the present invention, and FIG. 9 is a perspective view thereof.

【0010】図1乃至図3に示す流量計1は、高電圧が
印加された静電塗装機2に塗料を供給する塗料配管3の
流路に介装されるケーシング4内に、塗料の流量に応じ
た速度で回転する上下一対の可動部5,6が設けられて
いる。各可動部5,6は、合同な楕円形を成すセラミッ
クス製又は金属製のオーバル歯車で形成され、常時その
歯車同士が互いに90°偏移して歯合した状態を保ちな
がら、ケーシング4内を流通する塗料の圧力によって回
転せられる回転子となっている。
A flow meter 1 shown in FIGS. 1 to 3 has a flow rate of paint in a casing 4 which is interposed in a flow path of a paint pipe 3 for supplying paint to an electrostatic coating machine 2 to which a high voltage is applied. There is provided a pair of upper and lower movable parts 5 and 6 which rotate at a speed according to the above. Each of the movable parts 5 and 6 is formed of a congruent elliptical oval gear made of ceramics or metal, and the gears are always deviated by 90 ° from each other, and the inside of the casing 4 is kept in mesh with each other. It is a rotor that is rotated by the pressure of the circulating paint.

【0011】次に、一方の可動部5には、その回転の中
心となる部分から見て楕円の長径方向に偏移した所に、
一方の側面から他方の側面に貫通する透孔7が貫設され
て、その透孔7内に可動部5の厚みに相当する長さのガ
ラスロッドや光ファイバ等を差し込んで埋設した透光体
8が形成されている。
Next, on one of the movable parts 5, a part deviated in the major axis direction of the ellipse when viewed from the center of rotation thereof,
A transparent body having a through hole 7 penetrating from one side surface to the other side surface, and a glass rod or optical fiber having a length corresponding to the thickness of the movable portion 5 is inserted and embedded in the through hole 7. 8 is formed.

【0012】そして、可動部5を挟んで対向するケーシ
ング4の左右側壁11,12には、可動部5の回転によ
って透光体8が断続的に通過する位置でその透光体8を
通じて光を送受する光送信系EOの送光用光ファイバ9
の端末と光受信系OEの受光用光ファイバ10の端末
が、ケーシング4内の空間を介して互いに対峙するよう
に設けられている。なお、送光用光ファイバ9と受光用
光ファイバ10の各端末は、夫々ケーシング4の側壁1
1,12に固定され、当該各側壁11,12には、図2
に示すように、各光ファイバ9,10の端末を固定する
部分がガラスや強化プラスチックス等で成る透明体13
で形成されている。
The left and right side walls 11 and 12 of the casing 4 facing each other with the movable portion 5 interposed therebetween allow light to pass through the transparent body 8 at positions where the transparent body 8 intermittently passes by the rotation of the movable portion 5. Optical fiber 9 for transmitting and receiving optical transmission system EO
And the end of the light receiving optical fiber 10 of the optical receiving system OE are provided so as to face each other via the space inside the casing 4. The terminals of the optical fiber 9 for light transmission and the optical fiber 10 for light reception are respectively connected to the side wall 1 of the casing 4.
1, 12 and each of the side walls 11 and 12 has a structure shown in FIG.
As shown in FIG. 2, the transparent body 13 in which the end of each optical fiber 9 and 10 is fixed is made of glass or reinforced plastics.
Is formed by.

【0013】また、光送信系EOと光受信系OEは、夫
々送光用光ファイバ9と受光用光ファイバ10の延長端
に、電気/光変換素子で成る発光部14と光/電気変換
素子で成る受光部15が接続され、当該受光部15側に
は、周期的な電圧信号をパルス列に変換する信号処理部
16と、その信号処理部16から出力される電気パルス
信号に基づいて可動部5の回転速度を求めると同時に、
その回転速度と塗料流量設定値に対応する回転速度との
差値を求めて、その差値に応じたフィードバック制御信
号を出力する流量制御装置17が接続され、当該流量制
御装置17から出力されるフィードバック制御信号によ
り塗料配管3に介装された流量調節バルブ18を開閉制
御して静電塗装機2に供給される塗料の流量を自動的に
調節するようになっている。
Further, the optical transmission system EO and the optical reception system OE are provided at the extension ends of the optical fiber 9 for light transmission and the optical fiber 10 for light reception, respectively, and a light emitting section 14 and an optical / electrical conversion element which are electrical / optical conversion elements. Is connected to the light receiving unit 15 side, and on the side of the light receiving unit 15 is a signal processing unit 16 that converts a periodic voltage signal into a pulse train, and a movable unit based on the electric pulse signal output from the signal processing unit 16. At the same time as determining the rotation speed of 5,
A flow rate control device 17 that obtains a difference value between the rotation speed and the rotation speed corresponding to the paint flow rate set value and outputs a feedback control signal according to the difference value is connected and is output from the flow rate control device 17. The feedback control signal is used to open / close the flow rate adjusting valve 18 provided in the paint pipe 3 to automatically adjust the flow rate of the paint supplied to the electrostatic coating machine 2.

【0014】しかして、塗料配管3の管内を塗料が流れ
ると、その流れによってケーシング4内の可動部5,6
が塗料の流量に応じた回転速度で同期的に回転する。こ
の際、塗料が不透明な顔料塗料である場合は、光送信系
EOの送光用光ファイバ9と光受信系OEの受光用光フ
ァイバ10との間で送受する光が、ケーシング4内に充
満する顔料塗料と、ケーシング4内で回転する可動部5
とによって遮られ、唯一、可動部5の一部を成す透光体
8が両光ファイバ9,10の端末間を通過する時だけ、
その端末間の光路が透光体8を通じて導通する。
When the paint flows in the paint pipe 3, however, the flow causes the movable parts 5 and 6 in the casing 4 to move.
Rotate synchronously at a rotation speed according to the flow rate of the paint. At this time, when the paint is an opaque pigment paint, the casing 4 is filled with the light transmitted and received between the light transmitting optical fiber 9 of the light transmitting system EO and the light receiving optical fiber 10 of the light receiving system OE. Pigment coating and movable part 5 that rotates in the casing 4
Only when the light-transmitting body 8 forming a part of the movable part 5 passes between the ends of both the optical fibers 9 and 10 and is blocked by
The optical path between the terminals is conducted through the light transmitting body 8.

【0015】これにより、光送信系EOと光受信系OE
との間で送受する光が、可動部5の回転に対応して断続
されることとなり、その断続光が光受信系OEの受光用
光ファイバ10を通じて受光部15に伝送され、当該受
光部15で光/電気変換されて信号処理部16で周期的
な電気パルス信号に変換される。そして、流量制御装置
17が、信号処理部16から出力されるパルス列の周期
あるいは周波数を計測して可動部5の回転速度を求め、
次に、その回転速度と塗料流量設定値に対応する回転速
度との差値を求めて、その差値に応じたフィードバック
制御信号を塗料配管3に介装された流量調節バルブ18
に出力し、当該バルブ18によって塗料配管3の管内を
流れる塗料の流量が適正に調節される。
As a result, the optical transmission system EO and the optical reception system OE
The light transmitted and received between the light receiving section 15 and the light receiving section 15 is interrupted in response to the rotation of the movable section 5, and the intermittent light is transmitted to the light receiving section 15 through the light receiving optical fiber 10 of the light receiving system OE, and the light receiving section 15 concerned. The signal processing unit 16 converts the light / electricity into a periodical electric pulse signal. Then, the flow rate control device 17 measures the cycle or frequency of the pulse train output from the signal processing unit 16 to obtain the rotation speed of the movable unit 5,
Next, a difference value between the rotation speed and the rotation speed corresponding to the paint flow rate set value is obtained, and a feedback control signal corresponding to the difference value is provided to the flow rate control valve 18 provided in the paint pipe 3.
And the flow rate of the paint flowing in the paint pipe 3 is properly adjusted by the valve 18.

【0016】このように、ケーシング4内に設けた可動
部5の回転を送光用光ファイバ9と受光用光ファイバ1
0によって光学的にセンシングすれば、高電圧が印加さ
れる静電塗装機2の間近に流量計1を設けても、その高
電圧が信号処理部16や流量制御装置17等にリークし
てこれらが破壊される危険はない。
As described above, the rotation of the movable portion 5 provided in the casing 4 is controlled by the optical fiber 9 for transmitting light and the optical fiber 1 for receiving light.
If optically sensed by 0, even if the flow meter 1 is installed in the vicinity of the electrostatic coating machine 2 to which a high voltage is applied, the high voltage leaks to the signal processing unit 16 and the flow control device 17, etc. There is no danger of being destroyed.

【0017】なお、顔料塗料等のように不透明な流体の
流量を検出する場合は、可動部5を透明なプラスチック
等で成形して、その可動部5全体を透光体にし、楕円の
長径方向に延びる可動部5の両端が送光用光ファイバ9
と受光用光ファイバ10の端末間を通過する時に、その
端末間の光が導通されるようにしてもよい。
When detecting the flow rate of an opaque fluid such as pigment paint, the movable part 5 is formed of transparent plastic and the entire movable part 5 is made into a light-transmissive body. Both ends of the movable part 5 extending to the
When passing between the terminals of the light receiving optical fiber 10 and the terminals, the light between the terminals may be conducted.

【0018】また、図4に示すように、送光用光ファイ
バ9と受光用光ファイバ10の両端末を可動部5が常時
介在する位置で互いに対峙させるように設けると共に、
その位置に透孔7を貫設して透光体8を埋設すれば、顔
料塗料等の不透明な流体の流量を検出する時と全く同じ
センシング方法によってクリアー塗料や水等の透明な流
体の流量も検出することができる。更に、図4のよう
に、複数の透光体8を所定のピッチで環状に配列するよ
うに形成すれば、可動部5の回転速度の分解能が高まっ
て、流量の検出精度が著しく高まり、微少な流量変化も
確実に検出することができる。
Further, as shown in FIG. 4, both ends of the light transmitting optical fiber 9 and the light receiving optical fiber 10 are provided so as to face each other at a position where the movable portion 5 is always interposed.
By embedding the translucent body 8 by penetrating the through hole 7 at that position, the flow rate of the transparent fluid such as clear paint or water can be obtained by the same sensing method as when detecting the flow rate of the opaque fluid such as pigment paint. Can also be detected. Further, as shown in FIG. 4, if a plurality of translucent bodies 8 are formed in an annular arrangement at a predetermined pitch, the resolution of the rotational speed of the movable part 5 is increased, the detection accuracy of the flow rate is significantly increased, and it is very small. It is possible to reliably detect even a large flow rate change.

【0019】なお、可動部5に埋設する透光体8の数が
多ければ、その透光体8を埋設するために可動部5に貫
設する透孔7の数も多くなるから、可動部5の機械的強
度が低下して耐久性が損なわれるおそれがある。これを
防止するには、図5及び図6に示すように、透光体8の
数を減らして、その代わりに送光用光ファイバ9と受光
用光ファイバ10の本数を増やし、光送信系EOと光受
信系OEが、透光体8の移動方向に沿って複数箇所で光
を送受するようにすればよい。つまり、透光体8の移動
方向に沿って一定の間隔で各一対の送光用光ファイバ9
と受光用光ファイバ10を複数組設け、各送光用光ファ
イバ9,9・・・の延長端を分光器19を介して発光部
14に一括接続し、各受光用光ファイバ10,10・・
・の延長端を集光器20を介して受光部15に一括接続
すればよい。
If the number of light-transmitting bodies 8 embedded in the movable portion 5 is large, the number of through-holes 7 penetrating the movable portion 5 for burying the light-transmitting bodies 8 is also large. There is a risk that the mechanical strength of No. 5 will decrease and the durability will be impaired. In order to prevent this, as shown in FIGS. 5 and 6, the number of light-transmitting bodies 8 is reduced, and instead, the number of light-transmitting optical fibers 9 and light-receiving optical fibers 10 is increased to increase the optical transmission system. It is sufficient that the EO and the optical receiving system OE transmit and receive light at a plurality of locations along the moving direction of the translucent body 8. That is, each pair of optical fibers 9 for light transmission is provided at regular intervals along the moving direction of the translucent body 8.
And a plurality of light receiving optical fibers 10 are provided, and the extended ends of the respective light transmitting optical fibers 9, 9 ... Are collectively connected to the light emitting unit 14 via the spectroscope 19, and the respective light receiving optical fibers 10, 10 ...・
The extension ends of the above may be collectively connected to the light receiving unit 15 via the condenser 20.

【0020】なお、上記実施例では、本発明をオーバル
歯車式流量計に適用した場合について説明したが、本発
明はこれに限らず、ケーシング内で2個のルーツが回転
するルーツ式流量計や、ロータが回転するフローティン
グロータ式、スライドベーン式、あるいはピストンが往
復動するロータリーピストン式などにも適用できる。例
えば、図7に示すロータリーピストン式の流量計21に
適用する場合は、ケーシング22に設けたシリンダ23
内で流体の流量に応じた速度で往復動して回転クランク
シャフト24を回転させるピストン25の全体又はその
一部が透光体26によって形成される。そして、可動部
であるピストン25を挟んで両側から対向するケーシン
グ22の側壁27,28に、ピストン25の往復動によ
って透光体26が断続的に到来する位置でその透光体2
6を通じて光を送受する光送信系EOの送光用光ファイ
バ9と光受信系OEの受光用光ファイバ10の端末同士
が、シリンダ23内の空間を介して互いに対峙するよう
に設けられている。
In the above embodiment, the case where the present invention is applied to the oval gear type flow meter has been described. However, the present invention is not limited to this, and a roots type flow meter in which two roots rotate in a casing, It is also applicable to a floating rotor type in which a rotor rotates, a slide vane type, or a rotary piston type in which a piston reciprocates. For example, when applied to the rotary piston type flow meter 21 shown in FIG. 7, the cylinder 23 provided in the casing 22 is used.
The entire or part of the piston 25 that reciprocates at a speed corresponding to the flow rate of the fluid to rotate the rotary crankshaft 24 is formed by the light transmitting body 26. Then, at the position where the translucent body 26 intermittently arrives at the side walls 27 and 28 of the casing 22 which are opposed from both sides with the piston 25 which is the movable part interposed therebetween by the reciprocating movement of the piston 25.
The optical transmission optical fiber 9 of the optical transmission system EO and the optical reception optical fiber 10 of the optical reception system OE are provided so as to face each other via the space in the cylinder 23. ..

【0021】また、図8及び図9に示すスライドベーン
式流量計30に適用する場合は、ケーシング31内を流
通する流体の圧力を受けてロータ32に回転力を与える
各ベーン33又はそのうちの一つが透光体34で形成さ
れ、当該透光体34が断続的に通過する位置でその透光
体34を通じて光を送受する送光用光ファイバ9と受光
用光ファイバ10が、透光体34の左右両端を挟んで対
向するケーシング31の左右側壁35,36に設けられ
ている。
When applied to the slide vane type flowmeter 30 shown in FIGS. 8 and 9, each vane 33 or one of the vanes 33 which receives the pressure of the fluid flowing in the casing 31 and gives the rotor 32 a rotational force. Is formed of a light-transmitting body 34, and the light-transmitting optical fiber 9 and the light-receiving optical fiber 10 that transmit and receive light through the light-transmitting body 34 at positions where the light-transmitting body 34 passes intermittently. Are provided on the left and right side walls 35, 36 of the casing 31 that face each other with both left and right ends sandwiched therebetween.

【0022】なお、上記の各流量計は、光送信系EOの
発光部14と光受信系OEの受光部15が、光ファイバ
9及び10を介して光を送受するようになっているが、
高電圧ゾーンで使用しない流量計であれば、発光部14
を成す電気/光変換素子と受光部15を成す光/電気変
換素子をケーシングに取り付けて、両者間で直接光を送
受するようにしてもよい。
In each of the above flowmeters, the light emitting section 14 of the optical transmitting system EO and the light receiving section 15 of the optical receiving system OE transmit and receive light via the optical fibers 9 and 10.
If the flowmeter is not used in the high voltage zone, the light emitting unit 14
It is also possible to attach the electric / optical conversion element forming the above and the light / electric conversion element forming the light receiving portion 15 to the casing so that light is directly transmitted and received between the two.

【0023】[0023]

【発明の効果】以上述べたように、本発明による容積式
流量計は、流体が流通するケーシング内で回転又は往復
動する可動部の全体又は一部が透光体で形成され、当該
透光体が断続的に通過又は到来する位置でその透光体を
通じて光を送受する光送信系と光受信系が設けられてい
るから、流体の流量に応じた可動部の回転速度や往復速
度をその速度に比例した光パルス列に変換してケーシン
グの外部に取り出すことができる。したがって、その光
パルス列の周期あるいは周波数を計測することにより、
ケーシング内を流通する流体の流量を可動部に非接触で
検出することができ、特に顔料塗料等の不透明な流体で
あってもその流量を光学的に検出できるという優れた効
果がある。また、光送信系と光受信系との間で送受する
光を送光用光ファイバと受光用光ファイバで伝送すれ
ば、流量計を高電圧ゾーンに設けてもその電気系統が破
壊されるおそれがないから、高電圧が印加された静電塗
装機に供給される塗料の流量をその塗装機の間近で検出
することができ、更に、ガソリン等の可燃性物質の流量
を引火爆発の危険なく安全に計量する防爆流量計として
も使用できるという大変優れた効果がある。
As described above, in the positive displacement type flow meter according to the present invention, all or a part of the movable portion that rotates or reciprocates in the casing in which the fluid flows is formed of a light transmitting body, and the light transmitting body is used. Since an optical transmission system and an optical reception system for transmitting and receiving light through the translucent body are provided at the position where the body intermittently passes or arrives, the rotation speed and reciprocating speed of the movable part according to the flow rate of the fluid It can be converted into an optical pulse train proportional to the speed and taken out of the casing. Therefore, by measuring the period or frequency of the optical pulse train,
There is an excellent effect that the flow rate of the fluid flowing in the casing can be detected in a non-contact manner with the movable portion, and even if the fluid is an opaque fluid such as pigment paint, the flow rate can be optically detected. Moreover, if the light transmitted and received between the optical transmission system and the optical reception system is transmitted by the optical fiber for light transmission and the optical fiber for light reception, the electric system may be destroyed even if the flow meter is installed in the high voltage zone. Therefore, the flow rate of the paint supplied to the electrostatic coating machine to which a high voltage is applied can be detected in the vicinity of the coating machine, and the flow rate of combustible substances such as gasoline can be detected without danger of ignition and explosion. It has an excellent effect that it can be used as an explosion-proof flowmeter for safe measurement.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明による容積式流量計の第一実施例を示す
斜視図。
FIG. 1 is a perspective view showing a first embodiment of a positive displacement flow meter according to the present invention.

【図2】その流量計の部分断面図。FIG. 2 is a partial cross-sectional view of the flow meter.

【図3】その流量計の使用状態を示すフローシート図。FIG. 3 is a flow sheet diagram showing a usage state of the flow meter.

【図4】本発明の第二実施例を示す要部の斜視図。FIG. 4 is a perspective view of a main part showing a second embodiment of the present invention.

【図5】本発明の第三実施例を示す要部の斜視図。FIG. 5 is a perspective view of a main part showing a third embodiment of the present invention.

【図6】その使用状態を示すフローシート図。FIG. 6 is a flow sheet diagram showing the usage state.

【図7】本発明の第四実施例を示す平面図。FIG. 7 is a plan view showing a fourth embodiment of the present invention.

【図8】本発明の第五実施例を示す平面図。FIG. 8 is a plan view showing a fifth embodiment of the present invention.

【図9】その斜視図。FIG. 9 is a perspective view thereof.

【符号の説明】[Explanation of symbols]

1・・・オーバル歯車式流量計 4・・・ケーシング 5・・・可動部 7・・・透孔 8・・・透光体 EO・・・光送信系 OE・・・光受信系 9・・・送光用光ファイバ 10・・・受光用光ファイバ 21・・・ロータリーピストン式流量計 22・・・ケーシング 25・・・ピストン(可動部) 26・・・透光体 30・・・スライドベーン式流量計 31・・・ケーシング 33・・・ベーン(可動部) 34・・・透光体 1 ... Oval gear type flow meter 4 ... Casing 5 ... Movable part 7 ... Through hole 8 ... Translucent body EO ... Optical transmission system OE ... Optical reception system 9 ... -Optical fiber for light transmission 10 ... Optical fiber for light reception 21 ... Rotary piston type flowmeter 22 ... Casing 25 ... Piston (movable part) 26 ... Translucent body 30 ... Slide vane Type flow meter 31 ... Casing 33 ... Vane (movable part) 34 ... Translucent body

───────────────────────────────────────────────────── フロントページの続き (72)発明者 奥 田 高 稔 愛知県豊田市柿本町一丁目9番地 トリニ テイ工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takatoshi Okuda 1-9 Kakimoto-cho, Toyota-shi, Aichi Trinity Industry Co., Ltd.

Claims (1)

【特許請求の範囲】 【請求項1】 流体の流路に介装されるケーシング
(4,22,31)内で回転又は往復動してそのケーシング
内の空間部に充満する流体を連続的に送り出す可動部
(5,25,33)の全体又はその一部が、当該可動部を挟
んで対向する前記ケーシングの片壁側から他壁側へ光を
透過させる透光体(8,26,34)で形成され、当該透光
体が断続的に通過又は到来する位置でその透光体を通じ
て光を送受する光送信系(EO)と光受信系(OE)が設け
られていることを特徴とする容積式流量計。 【請求項2】 前記光送信系(EO)と光受信系(OE)
が、送光用光ファイバ(9)と受光用光ファイバ(10)
の端末間で光を送受する請求項1記載の容積式流量計。 【請求項3】 前記透光体(8,26,34)が、前記可動
部(5,25,33)を貫通する透孔(7)内に埋設された
光ファイバ又はガラスロッドである請求項1記載の容積
式流量計。 【請求項4】 前記光送信系(EO)と光受信系(OE)
が、前記透光体(8,26,34)の移動方向に沿って複数
箇所で光を送受する請求項1記載の容積式流量計。
Claim: What is claimed is: 1. A fluid that continuously rotates or reciprocates in a casing (4, 22, 31) interposed in a fluid flow path to fill a space in the casing continuously. The whole or a part of the movable portion (5, 25, 33) that is sent out transmits the light from one wall side of the casing that faces the other movable portion to the other wall side (8, 26, 34). ), And an optical transmission system (EO) and an optical reception system (OE) for transmitting and receiving light through the transparent body at a position where the transparent body passes or arrives intermittently. Positive flow meter. 2. The optical transmission system (EO) and the optical reception system (OE)
However, the optical fiber for transmitting light (9) and the optical fiber for receiving light (10)
The positive displacement flowmeter according to claim 1, wherein light is transmitted and received between the terminals. 3. The transparent body (8, 26, 34) is an optical fiber or a glass rod embedded in a transparent hole (7) penetrating the movable part (5, 25, 33). 1. The positive displacement flowmeter according to 1. 4. The optical transmission system (EO) and the optical reception system (OE)
The positive displacement flowmeter according to claim 1, wherein light is transmitted and received at a plurality of points along the moving direction of the light transmitting body (8, 26, 34).
JP15865891A 1991-06-28 1991-06-28 Volumetric flowmeter Pending JPH055641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15865891A JPH055641A (en) 1991-06-28 1991-06-28 Volumetric flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15865891A JPH055641A (en) 1991-06-28 1991-06-28 Volumetric flowmeter

Publications (1)

Publication Number Publication Date
JPH055641A true JPH055641A (en) 1993-01-14

Family

ID=15676527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15865891A Pending JPH055641A (en) 1991-06-28 1991-06-28 Volumetric flowmeter

Country Status (1)

Country Link
JP (1) JPH055641A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57146115A (en) * 1981-03-04 1982-09-09 Oval Eng Co Ltd Discharge transmitter
JPS5847130B2 (en) * 1981-02-18 1983-10-20 泰東製鋼株式会社 trawl net

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847130B2 (en) * 1981-02-18 1983-10-20 泰東製鋼株式会社 trawl net
JPS57146115A (en) * 1981-03-04 1982-09-09 Oval Eng Co Ltd Discharge transmitter

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