JP3529201B2 - Volumetric flow meter - Google Patents
Volumetric flow meterInfo
- Publication number
- JP3529201B2 JP3529201B2 JP20082995A JP20082995A JP3529201B2 JP 3529201 B2 JP3529201 B2 JP 3529201B2 JP 20082995 A JP20082995 A JP 20082995A JP 20082995 A JP20082995 A JP 20082995A JP 3529201 B2 JP3529201 B2 JP 3529201B2
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- housing
- lid
- calculator
- flange
- 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
Links
- 239000000463 material Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 description 15
- 238000006073 displacement reaction Methods 0.000 description 10
- 238000003780 insertion Methods 0.000 description 10
- 230000037431 insertion Effects 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Details Of Flowmeters (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、容積流量計に関
し、より詳細には、容積流量計における計量室と該計量
室内の非円形歯車の回転を検出演算して流量表示する密
封構造の流量演算器とをワンタッチで接合することを可
能とする容積流量計に関する。
【０００２】
【従来の技術】周知のように、容積流量計は、計量室で
回転する回転子を有し、計量室内に流入する流体の体積
に比例して回転する回転子の回転から流量を求める体積
流量計であり、流量計を取り付ける配管形状による流れ
変化影響を受けることが殆どないという特性をもってい
る。特に、一対の噛合回転する非円形歯車を有する容積
流量計は、歯車の噛合に要する摩擦トルクや、軸受部の
摩擦トルクの摩擦ロスが小さく非円形歯車は小さい圧力
差でも回転し、小流量まで流量計側が可能であることか
ら、特に、石油等の液体燃料の取引用として所定の検査
を経て合格の封印が施こされ使用に供されている。
【０００３】非円形歯車を有する容積流量計には、噛合
回転する一対の非円形歯車回転子の一方又は双方に磁石
等の発信素子を埋設した回転子を計量室内に回転自在に
収納した本体部と、前記回転子が流体の流れに応じて回
転する回転子の回転を発信素子を介して検出して流量演
算を施して流量表示および／又は流量信号を遠隔伝送す
る計数部とで構成した形式のものが多用されている。
【０００４】
【発明が解決しようとする課題】このように、構成され
た取引き用の容積流量計は、本体部と計数部とをボルト
等により接合して一体構成し、封印されるが、流量計側
範囲が小さく、例えば、最大流量が１０（ｌ／ｈ：リッ
タ／時）の灯油流量を計測する容積流量計では、封印
後、電池交換なしで長期間の耐用年数をもつことが要求
される。また、これらの小形容積流量計を本体部と計数
部と別々に構成してボルト等により接合する従来の方式
では、形状が大形になり、しかもコストが嵩み、更に使
用環境に合せて計数表示部を見やすいように姿勢を定め
るためには封印を取り外して位置調整しなければならな
い等の課題があった。
【０００５】本発明は、上記課題を解決するために、計
量室と流量演算器側とをビスやボルト等を使用すること
なくワンタッチで接合することが可能で、しかも、封印
を外すことなく自由に流量表示面を見易い向きに流量演
算器の姿勢を変更できるようにした容積流量計を提供す
ることを目的とする。
【０００６】
【課題を解決するための手段】本発明は、噛合回転する
一対の非円形歯車を有し、何れかの非円形歯車がその回
転面に磁石を埋設させてなる計量室と、該計量室の上側
に設置され、前記非円形歯車の回転に伴う前記磁石の移
動による磁気変化を検出して前記計量室に流れる流体の
流量を演算し、表示する流量演算器と、を備えた容積流
量計において、前記流量演算器は、該流量演算器を収納
する筐体と、該筐体の蓋体とによって、離脱不可に且つ
該流量演算器を回動可能に且つ表示面が該蓋体の開口か
ら目視可能に収納され、且つ前記筐体と蓋体とが封印さ
れており、前記流量演算器は、外周上に鍔部をもち、且
つ該流量演算器を前記筐体内で回動させるための回動用
突起をもち、前記筐体は、前記鍔部の下端面を載せる開
口端をもち、且つ該開口端近傍の外周上に外側に突起す
る複数の外側係止突起をもち、前記蓋体は、前記外側係
止突起と協働して前記流量演算器を回動可能な状態で固
定する複数の内側係止突起をもち、且つ、前記鍔部の上
端面を押さえることで前記筐体と協働して前記鍔部を挟
み、当該容積流量計は、前記筐体の材料を金属とし、前
記蓋体の材料を前記金属材料より剛性の小さい樹脂材料
とし、前記流量演算器を前記筐体内に収納し前記蓋体で
押圧した状態で、該蓋体のばね作用に抗して前記流量演
算器を軸まわりに回動可能とし、且つ前記ばね作用によ
り所望の位置に固定可能としたことを特徴としたもので
ある。
【０００７】
【０００８】
【０００９】
【発明の実施の形態】本発明による容積流量計の計数部
取付構造を説明するため、まず、容積流量計を構成する
各要素について説明する。構成要素は、計数部、蓋体、
筺体および流量計本体からなっている。これらの構成要
素について、以下に説明する。図１は、本発明による容
積流量計の計数部取付構造の実施の形態の一例を説明す
るための計数部で、図１（Ａ）は平面図、図１（Ｂ）は
側面図であり、図中、１は計数部（すなわち流量演算
器）、２はモールド体、３は鍔部、４は流量表示部、５
はＦ／Ｉ（周波数／電流）変換器、６は流量検出部であ
る。
【００１０】計数部１は、流量検出部６と、該流量検出
部６により検出された流量信号を演算処理する流量演算
部（図示せず）と、演算処理された流量信号を、例え
ば、積算流量として液晶表示する流量表示部４、および
Ｆ／Ｉ変換器５と、これらの電気回路を駆動する電池
（図示せず）が内蔵され、円筒状に一体にモールド加工
されモールド体２を構成する。モールド加工された計数
部１の電池寿命は７年以上で、電池交換が必要となる時
期迄が計数部１の寿命となる。流量検出部６は、円筒状
モールド体２の中心軸Ｚ−Ｚの底面２ａ近傍に埋設され
ている。モールド体２には外周側に突起する鍔部３が設
けられて、該鍔部３下面が後述する筺体に載置される。
Ｆ／Ｉ変換部５は、計数部１を回動する把持部となる部
分でもあり、流量表示部４の上部に突起している。
【００１１】図２は、図１に示した計数部を収納する蓋
部を説明するための図で、図２（Ａ）は平面図、図２
（Ｂ）は図２（Ａ）の矢視Ｂ−Ｂ線断面図であり、図
中、１０は蓋部、１１はリング状体、１２は開口部、１
３は封印鍔、１４は係止突起、１５は挿入面である。
【００１２】蓋部１０は、計数部１の流量表示部４の流
量表示が目視可能で、Ｆ／Ｉ変換部５を流量表示部４の
上方に突起させるため円形の開口部１２を有し、一方の
側端に封印穴１３ａを有する封印鍔１３が設けられた断
面Ｌ形のリング状体１１で、開口部１２の下端面には計
数部１の鍔部３を挿入できる大きさの内径をもった挿入
面１５が設けられている。挿入面１５には、内側に突起
する複数（図２では４個）の内側係止突起１４が等間隔
に設けられている。
【００１３】図３は、図１に示した計数部を収納し、流
量計本体を装着する筺体を説明するための図で、図３
（Ａ）は平面図、図３（Ｂ）は図３（Ａ）の矢視Ｂ−Ｂ
線断面図で、図中、２０は筺体、２１は円筒体、２２は
上部開口、２３は封印鍔、２４は外側係止突起、２５は
挿入面である。
【００１４】筺体２０は底部２１ａ、上部開口２２を有
する内径が略一定な有底円筒体２１で、上部開口２２近
傍の外周面は挿入面２５となっている。該挿入面２５に
は、前記内側係止突起１４と協働して計数部１を係止す
る外側係止突起２４が、前記内側突起１４と等しい数で
等間隔に設けられている。また、上端近傍の外側に封印
鍔１３と協働して封印するための封印穴２３ａを有する
封印鍔２３が設けられている。また、外側底面２１ｂに
は、次に説明する流量計本体が取り付けられる。
【００１５】図４は、図１の計数部に対応する流量計本
体で、図４（Ａ）は平面図、図４（Ｂ）は図４（Ａ）の
矢視Ｂ−Ｂ線断面図であり、図中、３０は流量計本体、
３１は本体、３２は計量室、３３は流路、３４はＯリン
グ溝、３５，３６は非円形歯車回転子、３７は固定軸、
３８，３９は磁石である。
【００１６】図４において、流量計本体３０は、本体３
１と一対の噛合回転する非円形歯車回転子（以後、回転
子と記す）３５，３６とからなっている。本体３１は、
一対の円形壁面をもつ凹状で円形中心に固定軸３７，３
７を取り付けた計量室３２と、計量室３２に連通し本体
３１を貫通する流路３３と、計数室３２の外周表面に設
けられたＯリング溝３４を有している。一対の固定軸３
７には、回転子３５，３６が回転可能に噛合して軸支さ
れ、一方の回転子、例えば、回転子３５の長軸上には軸
対称に発信素子となる磁石３８，３９が埋設されてい
る。次に、流量計本体３０に対する計数部１の取付構造
を説明する。
【００１７】図５は、本発明による容積流量計の計数部
取付構造の実施の形態の一例を説明するための部分側断
面図であり、図５および以下に示す図６において、図１
及至図４と同様の作用をする部分には、図１及至図４の
場合と同じ参照番号を付してある。
【００１８】まず、流量計本体３０を取り付けた筺体２
０内に、計数部１の鍔部３を筺体２０の外周端面２１ｃ
上に載置して計数部１を収納する。このとき、鍔部３の
下面から底面２ａまでの高さＨ1が、筺体２０の外周端
面２１ｃから底部２１ａまでの深さＨ2より僅かに大き
く（Ｈ1≧Ｈ2）してある。次に、筺体２０に載置された
計数部１に蓋部１０を挿入面２５と挿入面１５とが嵌合
するようにして覆せる。尚、計数部１の鍔部３と筐体２
０の外周端面２１ｃとの間にＯリング等の弾性体を介在
して嵌合するようにしてもよい。このとき、蓋部１０の
内側係止突起１４と、筺体２０の外側係止突起２４の円
周方向の位相はずれている。その後、蓋部１０を計数部
１が筺体２０内に押し付けられるように周方向に回動し
て、内側係止突起１４を外側係止突起２４に圧接させて
計数部１を筐体２０に取り付ける。このとき封印鍔１３
と封印鍔２３の位置が一致するようにして封印穴１３ａ
と２３ａとの間を封印する。
【００１９】以上の操作により計数部１は蓋部１０と筺
体２０との間に圧接されるが、各々が金属であるとき
は、剛性が高く、計数部１は略固定され、従って流量表
示部４の位置も定められてしまう。しかし流量計の取り
付け姿勢は、配管条件により異なり、配管条件は、使用
環境により異なるため、流量表示部４の流量表示が見に
くい場合がある。
【００２０】この不具合を取り除くためには、計数部１
が筺体２０と蓋部１０の間に圧接された状態でも計数部
１を回動自在にすることが求められる。このために、蓋
部１０の材料を筺体２０の金属材料に対して剛性の小さ
い樹脂材料にして蓋部１０を一つのばね材料として計数
部１を周方向に回動できるようにする。
【００２１】計数部１を回動したとき、計数部１の底面
２ａ近傍に設けられた流量検出部６が、回転子３５の発
信素子の磁石３８，３９の回転を誤りなく検知できなけ
ればならない。このための配置を図６により説明する。
【００２２】図６は、本発明に係る容積流量計の筺体へ
の取付構造の実施の形態を説明するための図である。前
述のように計数部１に内蔵された流量検出部６は円筒状
のモールド体２のＺ−Ｚ軸上に設けられている。鍔３の
外周はＺ−Ｚ軸を中心とした円周であり、鍔３は外筺２
０の外周端面２１ｃに同心に載置され圧接されているの
で、流量検出部６は外筺２０の外側面２１の中央、Ｘ−
Ｘ軸、Ｙ−Ｙ軸の交点０上にある。従って流量発信素子
である磁石３８，３９の回転軌跡円４０と中央位置０と
が一致するように流量計本体３１を筺体２０の外側底面
２１ｂに取り付ける。
【００２３】
【発明の効果】本発明によれば、計量室と流量演算器と
をビスやボルト等を使用することなくワンタッチで接合
することが可能で、しかも、封印を外すことなく自由に
流量表示面を見易い向きに回動して流量演算器の姿勢を
変更することが可能で、小形で安価な取引用容積流量計
を提供することができる。
【００２４】
【００２５】BACKGROUND OF THE INVENTION [0001] [Technical Field of the Invention The present invention is related to <br/> the volumetric flowmeter, and more particularly, the metering chamber in the positive displacement flowmeter and the metering
About the displacement flowmeter makes it possible to bond by detecting computes the rotation of the non-circular gear chamber and a flow rate computation unit for sealing structure for flow rate display with one touch. 2. Description of the Related Art As is well known, a positive displacement flow meter has a rotor that rotates in a measuring chamber, and measures a flow rate from the rotation of the rotor that rotates in proportion to the volume of fluid flowing into the measuring chamber. It is a volume flow meter to be sought, and has a characteristic that it is hardly affected by a flow change due to a shape of a pipe to which the flow meter is attached. In particular, a volumetric flowmeter having a pair of meshing and rotating non-circular gears has a small frictional torque required for gear meshing and a friction loss of friction torque of a bearing portion. Since it is possible to use a flow meter, it is sealed and passed for use after passing through a predetermined inspection, especially for trading of liquid fuel such as petroleum. A volumetric flowmeter having a non-circular gear includes a main body in which a rotor having a transmitting element such as a magnet embedded in one or both of a pair of non-circular gear rotors that mesh with each other is rotatably housed in a measuring chamber. And a counter for detecting the rotation of the rotor, which rotates in accordance with the flow of the fluid, through a transmitting element, performing a flow rate calculation, and displaying a flow rate and / or remotely transmitting a flow rate signal. Are often used. [0004] In the transaction volumetric flowmeter constructed as described above, the main body and the counting section are integrally formed by joining the main body and the counting section with bolts or the like, and sealed. A volumetric flowmeter that measures a kerosene flow rate with a small flowmeter-side range, for example, a maximum flow rate of 10 (l / h: liter / hour), needs to have a long service life without replacing the battery after sealing. Is done. In the conventional method in which these small volumetric flow meters are constructed separately from the main unit and the counting unit and joined with bolts, the shape becomes large, the cost increases, and the counting is performed in accordance with the usage environment. In order to determine the posture so that the display unit is easy to see, there is a problem that the seal must be removed and the position adjusted. The present invention, in order to solve the above problems, a total of
It can be joined with one touch without using the amount chamber and the flow rate computing unit side and a screw or bolt or the like, moreover, the flow Starring freely flow display surface easily viewable direction without removing the seal
An object of the present invention is to provide a positive displacement flowmeter capable of changing the attitude of a calculator . SUMMARY OF THE INVENTION [0006] The present invention provides a meshing rotation.
It has a pair of non-circular gears, one of which is
A measuring chamber with a magnet embedded in the turning surface and an upper side of the measuring chamber
And the transfer of the magnet with the rotation of the non-circular gear.
Of the fluid flowing through the measuring chamber
A flow rate calculator that calculates and displays the flow rate
In the meter, the flow rate calculator stores the flow rate calculator.
And the lid of the housing,
Whether the flow rate calculator can be rotated and the display surface is the opening of the lid
And the case and the lid are sealed.
The flow rate calculator has a flange on the outer periphery, and
For rotating the flow rate calculator in the housing.
The housing has a projection, and the housing has an opening on which a lower end surface of the flange is placed.
It has a mouth end and protrudes outward on the outer periphery near the open end.
The lid has a plurality of outer locking projections,
The flow calculator is fixed in a rotatable state in cooperation with the stop projection.
Having a plurality of inner locking projections, and
By holding down the end surface, the flange portion is interposed in cooperation with the housing.
The positive displacement flowmeter is characterized in that the casing is made of metal,
The material of the lid is a resin material having a lower rigidity than the metal material.
And the flow rate calculator is housed in the housing and the lid body
In the pressed state, the flow rate control is performed against the spring action of the lid.
The calculator is rotatable about an axis, and the
It is characterized in that it can be fixed at a desired position . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to explain a structure for mounting a counting section of a positive displacement flowmeter according to the present invention, first, each element constituting the positive displacement flowmeter will be described. The components are a counting unit, a lid,
It consists of a housing and a flow meter body. These components will be described below. FIG. 1 is a counting section for explaining an example of an embodiment of a counting section mounting structure of a volume flow meter according to the present invention. FIG. 1 (A) is a plan view, FIG. 1 (B) is a side view, In the figure, reference numeral 1 denotes a counting unit (that is,
Vessel), 2 molded body, 3 flange portion 4 flow rate display unit, 5
Is an F / I (frequency / current) converter, and 6 is a flow rate detector. The counting section 1 includes a flow rate detecting section 6, a flow rate calculating section (not shown) for calculating the flow rate signal detected by the flow rate detecting section 6, and an integrated flow rate signal, for example. A flow rate display unit 4 for displaying a liquid crystal as a flow rate, an F / I converter 5, and a battery (not shown) for driving these electric circuits are built in, and are integrally molded into a cylindrical shape to form a molded body 2. . The life of the battery of the molded counting unit 1 is 7 years or more, and the life of the counting unit 1 is the time until battery replacement is required. The flow rate detector 6 is embedded near the bottom surface 2 a of the central axis Z-Z of the cylindrical mold body 2. The molded body 2 is provided with a flange portion 3 protruding on the outer peripheral side, and the lower surface of the flange portion 3 is mounted on a housing described later.
The F / I conversion unit 5 is also a part serving as a grip unit that rotates the counting unit 1, and protrudes above the flow rate display unit 4. FIG. 2 is a view for explaining a lid for accommodating the counting section shown in FIG. 1. FIG. 2 (A) is a plan view, FIG.
2 (B) is a sectional view taken along the line BB of FIG. 2 (A), in which 10 is a lid, 11 is a ring-shaped body, 12 is an opening, 1
3 is a sealing flange, 14 is a locking projection, and 15 is an insertion surface. The lid 10 has a circular opening 12 for visually indicating the flow rate display on the flow rate display section 4 of the counting section 1 and for projecting the F / I conversion section 5 above the flow rate display section 4. A ring-shaped body 11 having an L-shaped cross section provided with a sealing flange 13 having a sealing hole 13a at one side end. The inner surface of the lower end surface of the opening 12 is large enough to allow the flange 3 of the counting unit 1 to be inserted. A provided insertion surface 15 is provided. The insertion surface 15 is provided with a plurality of (four in FIG. 2) inner locking projections 14 projecting inward at equal intervals. FIG. 3 is a view for explaining a housing in which the counting section shown in FIG. 1 is housed and the main body of the flowmeter is mounted.
3A is a plan view, and FIG. 3B is a view taken along a line BB in FIG.
In the drawing, 20 is a housing, 21 is a cylindrical body, 22 is an upper opening, 23 is a sealing flange, 24 is an outer locking projection, and 25 is an insertion surface. The housing 20 is a bottomed cylindrical body 21 having a bottom 21a and an upper opening 22 and having a substantially constant inner diameter. An outer peripheral surface near the upper opening 22 is an insertion surface 25. On the insertion surface 25, outer locking protrusions 24 for locking the counting unit 1 in cooperation with the inner locking protrusions 14 are provided at equal intervals as the number of the inner protrusions 14. Further, a sealing flange 23 having a sealing hole 23a for sealing in cooperation with the sealing flange 13 is provided outside near the upper end. Further, a flowmeter main body described below is attached to the outer bottom surface 21b. FIG. 4 is a flow meter main body corresponding to the counting section of FIG. 1, FIG. 4 (A) is a plan view, and FIG. 4 (B) is a sectional view taken along the line BB of FIG. 4 (A). In the figure, 30 is a flow meter body,
31 is a main body, 32 is a measuring chamber, 33 is a flow path, 34 is an O-ring groove, 35 and 36 are non-circular gear rotors, 37 is a fixed shaft,
38 and 39 are magnets. In FIG. 4, the main body 30 of the flow meter is
1 and a pair of non-circular gear rotors (hereinafter, referred to as rotors) 35 and 36 which mesh and rotate. The main body 31
Fixed shafts 37, 3 at the center of a circle with a concave shape having a pair of circular walls
7, a flow path 33 communicating with the measuring chamber 32 and penetrating the main body 31, and an O-ring groove 34 provided on the outer peripheral surface of the counting chamber 32. A pair of fixed shafts 3
Rotors 35 and 36 are rotatably meshed with and rotatably supported by 7, and magnets 38 and 39 serving as transmitting elements are buried axially symmetrically on one of the rotors, for example, on the long axis of the rotor 35. ing. Next, the mounting structure of the counting unit 1 to the flowmeter main body 30 will be described. FIG. 5 is a partial side sectional view for explaining an example of the embodiment of the counting section mounting structure of the positive displacement flowmeter according to the present invention. In FIG. 5 and FIG.
4 to FIG. 4 are denoted by the same reference numerals as in FIG. 1 to FIG. First, the housing 2 to which the flow meter body 30 is attached
0, the flange 3 of the counting section 1 is attached to the outer peripheral end face 21c of the housing 20.
The counting unit 1 is stored by being placed on top. In this case, the height H 1 from the lower surface of the flange portion 3 to the bottom surface 2a is, are slightly greater than the depth of H 2 to the bottom portion 21a from the outer peripheral end surface 21c of the housing 20 (H 1 ≧ H 2) . Next, the cover 10 is covered on the counting unit 1 placed on the housing 20 such that the insertion surface 25 and the insertion surface 15 are fitted. In addition, the flange 3 of the counting unit 1 and the housing 2
The outer peripheral surface 21c may be fitted with an elastic body such as an O-ring. At this time, the phases of the inner locking projection 14 of the lid 10 and the outer locking projection 24 of the housing 20 in the circumferential direction are shifted. Thereafter, the lid 10 is rotated in the circumferential direction so that the counting section 1 is pressed into the housing 20, and the inner locking projection 14 is pressed against the outer locking projection 24 to attach the counting section 1 to the housing 20. . At this time, the sealing collar 13
And the position of the sealing collar 23 are matched so that the sealing hole 13a
It sealed between the 23a. By the above operation, the counting section 1 is pressed between the lid section 10 and the housing 20. When each is made of metal, the counting section 1 has high rigidity, and the counting section 1 is substantially fixed. The position of 4 is also determined. However, the mounting posture of the flow meter varies depending on the piping conditions, and the piping conditions vary depending on the use environment. To eliminate this problem, the counting unit 1
It is required that the counting unit 1 be rotatable even when the pressure unit is pressed between the housing 20 and the lid unit 10. For this, it allows rotating the counter 1 in the circumferential direction of the material of the cover portion 10 to cover portion 10 and a small resin material stiffness as a spring material to a metal material of the casing 20. When the counting section 1 is rotated, the flow detecting section 6 provided near the bottom surface 2a of the counting section 1 must be able to detect the rotation of the magnets 38 and 39 of the transmitting element of the rotor 35 without error. . The arrangement for this will be described with reference to FIG. FIG. 6 is a view for explaining an embodiment of the mounting structure of the volume flow meter to the housing according to the present invention. As described above, the flow rate detecting section 6 built in the counting section 1 is provided on the ZZ axis of the cylindrical mold body 2. The outer periphery of the flange 3 is a circle around the ZZ axis, and the flange 3 is
0 is concentrically mounted and pressed against the outer peripheral end surface 21c of the outer casing 20.
It is on the intersection 0 of the X axis and the YY axis. Therefore, the flowmeter main body 31 is attached to the outer bottom surface 21b of the housing 20 so that the rotation locus circles 40 of the magnets 38 and 39, which are flow rate transmitting elements, coincide with the center position 0. According to the present invention, the measuring chamber, the flow rate calculator,
One-touch bonding without using screws or bolts
And without breaking the seal
Rotate the flow rate display surface in an easy-to-see direction to adjust the posture of the flow rate calculator.
It is possible to provide a small and inexpensive positive displacement volume meter which can be changed. [0024]
【図面の簡単な説明】
【図１】 本発明による容積流量計の計数部取付構造の
実施の形態の一例を説明するための計数部である。
【図２】 図１に示した計数部を収納する蓋部を説明す
るための図である。
【図３】 図１に示した計数部を収納し、流量計本体を
装着する筺体を説明するための図である。
【図４】 図１の計数部に対応する流量計本体である。
【図５】 本発明による容積流量計の計数部取付構造の
実施の形態の一例を説明するための部分側断面図であ
る。
【図６】 本発明に係る容積流量計の筺体への取付構造
の実施の形態を説明するための図である。
【符号の説明】
１…計数部、２…モールド体、３…鍔部、４…流量表示
部、５…Ｆ／Ｉ（周波数／電流）変換器、６…流量検出
部、１０…蓋部、１１…リング状体、１２…開口部、１
３…封印鍔、１４…係止突起、１５…挿入面、２０…筺
体、２１…円筒体、２２…上部開口、２３…封印鍔、２
４…外側係止突起、２５…挿入面、３０…流量計本体、
３１…本体、３２…計量室、３３…流路、３４…Ｏリン
グ溝、３５，３６…非円形歯車回転子、３７…固定軸、
３８，３９…磁石。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a counting section for explaining an example of an embodiment of a counting section mounting structure of a volume flow meter according to the present invention. FIG. 2 is a diagram for explaining a lid that stores the counting unit shown in FIG. 1; FIG. 3 is a view for explaining a housing in which the counting unit shown in FIG. 1 is housed and a flowmeter main body is mounted. FIG. 4 is a flow meter main body corresponding to the counting unit in FIG. 1; FIG. 5 is a partial side sectional view for explaining an example of an embodiment of a counting section mounting structure of a positive displacement flowmeter according to the present invention. FIG. 6 is a view for explaining an embodiment of a mounting structure of a volume flow meter to a housing according to the present invention. [Description of Signs] 1 ... Counter, 2 ... Mold, 3 ... Flange, 4 ... Flow display, 5 ... F / I (frequency / current) converter, 6 ... Flow detector, 10 ... Lid 11: ring-shaped body, 12: opening, 1
3 ... sealing flange, 14 ... locking projection, 15 ... insertion surface, 20 ... housing, 21 ... cylindrical body, 22 ... upper opening, 23 ... sealing flange, 2
4 ... outside locking projection, 25 ... insertion surface, 30 ... flow meter body,
31 ... body, 32 ... measuring chamber, 33 ... flow path, 34 ... O-ring groove, 35, 36 ... non-circular gear rotor, 37 ... fixed shaft,
38, 39 ... magnets.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01F 1/075 G01F 3/10 G01F 15/075 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) G01F 1/075 G01F 3/10 G01F 15/075
Claims (1)
何れかの非円形歯車がその回転面に磁石を埋設させてな
る計量室と、該計量室の上側に設置され、前記非円形歯
車の回転に伴う前記磁石の移動による磁気変化を検出し
て前記計量室に流れる流体の流量を演算し、表示する流
量演算器と、を備えた容積流量計において、前記流量演
算器は、該流量演算器を収納する筐体と、該筐体の蓋体
とによって、離脱不可に且つ該流量演算器を回動可能に
且つ表示面が該蓋体の開口から目視可能に収納され、且
つ前記筐体と蓋体とが封印されており、 前記流量演算器は、外周上に鍔部をもち、且つ該流量演
算器を前記筐体内で回動させるための回動用突起をも
ち、 前記筐体は、前記鍔部の下端面を載せる開口端をもち、
且つ該開口端近傍の外周上に外側に突起する複数の外側
係止突起をもち、 前記蓋体は、前記外側係止突起と協働して前記流量演算
器を回動可能な状態で固定する複数の内側係止突起をも
ち、且つ、前記鍔部の上端面を押さえることで前記筐体
と協働して前記鍔部を挟み、 当該容積流量計は、前記筐体の材料を金属とし、前記蓋
体の材料を前記金属材料より剛性の小さい樹脂材料と
し、前記流量演算器を前記筐体内に収納し前記蓋体で押
圧した状態で、該蓋体のばね作用に抗して前記流量演算
器を軸まわりに回動可能とし、且つ前記ばね作用により
所望の位置に固定可能とした ことを特徴とする容積流量
計。 (57) [Claim 1] It has a pair of non-circular gears that mesh and rotate,
Do not allow any non-circular gear to have a magnet embedded in its rotating surface.
A measuring chamber, and the non-circular teeth installed above the measuring chamber.
Detects the magnetic change due to the movement of the magnet with the rotation of the car
Calculates the flow rate of the fluid flowing through the measuring chamber and displays the calculated flow rate.
A flow calculator comprising:
The calculator has a housing for accommodating the flow rate calculator, and a lid of the housing.
, So that the flow rate calculator can be rotated and cannot be disengaged.
And a display surface is housed so as to be visible from the opening of the lid, and
The housing and the lid are sealed, and the flow rate calculator has a flange on the outer periphery, and
A rotation projection for rotating the calculator in the housing is also provided.
The housing has an open end on which the lower end surface of the flange is placed,
And a plurality of outsides projecting outward on the outer periphery near the open end.
The lid has a locking projection, and the lid body cooperates with the outer locking projection to calculate the flow rate.
It also has a plurality of inner locking projections that fix the container in a rotatable state.
And pressing the upper end surface of the flange to form the housing
The volume flow meter sandwiches the flange in cooperation with
The body material is made of a resin material having a smaller rigidity than the metal material.
Then, the flow rate calculator is housed in the housing and pushed by the lid.
In the pressurized state, the flow rate calculation is performed against the spring action of the lid.
Container can be turned around an axis, and by the above-mentioned spring action
Volume flow rate characterized by being able to be fixed at a desired position
Total.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20082995A JP3529201B2 (en) | 1995-08-07 | 1995-08-07 | Volumetric flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20082995A JP3529201B2 (en) | 1995-08-07 | 1995-08-07 | Volumetric flow meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0949747A JPH0949747A (en) | 1997-02-18 |
| JP3529201B2 true JP3529201B2 (en) | 2004-05-24 |
Family
ID=16430900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20082995A Expired - Lifetime JP3529201B2 (en) | 1995-08-07 | 1995-08-07 | Volumetric flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3529201B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011043452A1 (en) | 2009-10-10 | 2011-04-14 | 株式会社オーバル | Field equipment photoelectric sensing sensitivity adjustment |
-
1995
- 1995-08-07 JP JP20082995A patent/JP3529201B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011043452A1 (en) | 2009-10-10 | 2011-04-14 | 株式会社オーバル | Field equipment photoelectric sensing sensitivity adjustment |
| US8970124B2 (en) | 2009-10-10 | 2015-03-03 | Oval Corporation | Field equipment photoelectric sensing sensitivity adjustment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0949747A (en) | 1997-02-18 |
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