JPS633246B2 - - Google Patents
Info
- Publication number
- JPS633246B2 JPS633246B2 JP14990582A JP14990582A JPS633246B2 JP S633246 B2 JPS633246 B2 JP S633246B2 JP 14990582 A JP14990582 A JP 14990582A JP 14990582 A JP14990582 A JP 14990582A JP S633246 B2 JPS633246 B2 JP S633246B2
- Authority
- JP
- Japan
- Prior art keywords
- band piece
- flow path
- band
- downstream
- housing
- 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
- G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
-
- 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
- G01F1/54—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 means of chains, flexible bands or wires introduced into and moved by, the flow
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Description
【発明の詳細な説明】
本発明は本発明者等が昭和57年特許願第112525
号（特開昭59−5917号公報）により開示したバン
ド型流量計に関する。[Detailed Description of the Invention] The present invention was made by the present inventors in patent application No. 112525 filed in 1982.
The present invention relates to a band-type flowmeter disclosed in No. (Japanese Unexamined Patent Publication No. 59-5917).
このバンド型流量計は内部に断面矩形状の流路
を有する筐体内に可撓性のあるバンド片を屈曲さ
せて設け、これが上記流路内を通過する流体によ
つて波状に振動するよう構成し、上記バンド片の
振動数を検出して流体の流量を知るものである
が、この流量計には上記バンド片の下流側固定部
が流体の通過に伴うバンド片の波状の振動によつ
て疲労破壊を起すという問題点があつた。 This band-type flowmeter has a flexible band piece bent inside a housing that has a flow path with a rectangular cross section, and is configured to vibrate in a wave-like manner due to the fluid passing through the flow path. The flow rate of the fluid is determined by detecting the frequency of the band piece, but in this flow meter, the downstream fixed part of the band piece detects the vibration frequency of the band piece due to the wave-like vibration of the band piece as the fluid passes through. There was a problem that fatigue failure occurred.
本発明は叙上の観点に立つてなされたものであ
り、バンド片が疲労破壊を起すことがなく、長期
にわたり使用できるバンド型流量計を提供するこ
とを目的とする。 The present invention has been made based on the above-mentioned viewpoints, and an object of the present invention is to provide a band-type flowmeter that can be used for a long period of time without causing fatigue failure of the band pieces.
而して、本発明の要旨とするところはバンド片
の下流側固定部を挾んで筐体内壁に膨出部を設
け、これによりバンド片の下流端部分の振動領域
を限定し、その疲労破壊を防止することにある。 Therefore, the gist of the present invention is to provide a bulge on the inner wall of the casing, sandwiching the downstream fixing part of the band piece, thereby limiting the vibration area of the downstream end of the band piece, thereby preventing fatigue failure thereof. The goal is to prevent
以下図面にもとづいて本発明の構成の詳細を説
明する。 The details of the configuration of the present invention will be explained below based on the drawings.
第１図は本発明にかかるバンド型流量計の一実
施例を示す一部破断斜視図、第２図は膨出部の作
用説明図である。 FIG. 1 is a partially cutaway perspective view showing an embodiment of a band type flowmeter according to the present invention, and FIG. 2 is an explanatory view of the function of the bulging portion.
第１図中、１はその内部に軸直角断面が矩形の
流路を有する中空の筐体、１ａは筐体１の流入
口、１ｂは筐体１の流出口、１ｃ〜１ｆは筐体１
の内壁、２は筐体１内に波状に屈曲した状態で収
納されたバンド片、２ａはバンド片２の上流側の
端辺を取り付けた固定軸、２ｂはバンド片２の下
流側の端辺を取り付けた固定軸、２ｃ，２ｄはバ
ンド片２の長手方向の端辺、３は上記バンド片の
振動を検知するため筐体１の側壁上に取り付けた
検出器、４ａ，４ｂは筐体１の内壁の下流側固定
軸２ｂ付近のバンド片と対向する部分に設けた膨
出部である。 In FIG. 1, 1 is a hollow casing having a flow path with a rectangular cross section perpendicular to the axis, 1a is an inlet of the casing 1, 1b is an outlet of the casing 1, and 1c to 1f are the casing 1.
2 is a band piece stored in the housing 1 in a wave-like bent state, 2a is a fixed shaft to which the upstream end of the band piece 2 is attached, 2b is a downstream end of the band piece 2 2c and 2d are the longitudinal ends of the band piece 2; 3 is a detector attached to the side wall of the housing 1 to detect the vibration of the band piece; 4a and 4b are the housing 1 This is a bulge provided at a portion of the inner wall of the band near the downstream fixed shaft 2b facing the band piece.
固定軸２ａ，２ｂの両端は筐体１の内壁１ｃ及
び１ｄに取り付けられている。ここで固定軸２ａ
及び２ｂの端部を取り付ける場合に必ずしも筐体
内壁へ固着せず、例えば固定軸２ａ，２ｂの端部
を回動自在に筐体内壁へ軸支してもよく、バンド
片２の上流側及び下流側端辺の位置が筐体１に対
して変動しないような取り付け方であればよい。
但し、場合によつては両端を弾性的に支承した
り、微小距離移動可能に支持してもよい。 Both ends of the fixed shafts 2a and 2b are attached to the inner walls 1c and 1d of the housing 1. Here, the fixed shaft 2a
When attaching the ends of the fixed shafts 2a and 2b, they are not necessarily fixed to the inner wall of the housing. For example, the ends of the fixed shafts 2a and 2b may be rotatably supported on the inner wall of the housing. Any mounting method may be used as long as the position of the downstream end side does not change with respect to the housing 1.
However, depending on the case, both ends may be supported elastically or supported so as to be movable over a minute distance.
バンド片２の軸方向の長さはバンド片２の両面
がその波の頂点部において筐体１の内壁１ｅ及び
１ｆと接触するよう固定軸２ａと固定軸２ｂとの
距離よりも長く設定されている。またバンド片２
の長手方向の両端辺２ｃ及び２ｄは筐体１の内壁
１ｃ及び１ｄに接触している。 The length of the band piece 2 in the axial direction is set to be longer than the distance between the fixed shaft 2a and the fixed shaft 2b so that both sides of the band piece 2 come into contact with the inner walls 1e and 1f of the housing 1 at the peaks of the waves. There is. Also band piece 2
Both longitudinal end sides 2c and 2d of are in contact with the inner walls 1c and 1d of the housing 1.
膨出部４ａ，４ｂは筐体１の内壁に固定されて
おり、その取り付け位置は固定軸２ｂと固定軸２
ｂ付近のバンド片２との間に設定されている。 The bulges 4a and 4b are fixed to the inner wall of the housing 1, and their mounting positions are between the fixed shaft 2b and the fixed shaft 2.
It is set between the band piece 2 near b.
膨出部の頂上部の高さは各々筐体１の固定軸と
平行な内壁１ｅ，１ｆ間の距離の15〜40％、さら
に望ましくは20〜30％に設定し、且つ、その上流
側斜面はバンド片２を略正弦波状に振動せしめ得
る位置及び傾斜に設定するものである。 The height of the top of the bulge is set to 15 to 40%, more preferably 20 to 30%, of the distance between the inner walls 1e and 1f parallel to the fixed axis of the housing 1, and the height of the upstream slope The band piece 2 is set at a position and at an inclination that allows the band piece 2 to vibrate in a substantially sinusoidal manner.
頂上部の高さが15％以下となるとバンド片２の
振動を完全に規制できなくなり、また40％以上で
あると圧力損失が過大となりかえつて不都合を生
じてしまう。 If the height of the top portion is less than 15%, the vibrations of the band piece 2 cannot be completely controlled, and if it is more than 40%, the pressure loss becomes excessive and causes problems.
また上流側斜面はバンド片２が第２図に示す静
止位置２′にあるときこれに軽く接触するよう構
成することが推奨される。上流側斜面が第２図に
示す静止位置２′にあるときのバンド片よりも上
流側にあるとバンド片２の正弦波状の振動を妨
げ、また下流側にあるとバンド片２の振動を規制
する効果が薄れるからである。 It is also recommended that the upstream slope be configured so that it lightly contacts the band piece 2 when it is in the rest position 2' shown in FIG. If the upstream slope is located upstream of the band piece 2 at the rest position 2' shown in FIG. 2, it will prevent the sinusoidal vibration of the band piece 2, and if it is downstream, it will restrict the vibration of the band piece 2. This is because the effect of
次に第２図について説明する。 Next, FIG. 2 will be explained.
第２図中１ａ，１ｂ，１ｅ，１ｆ，２ａ，２
ｂ，４ａ，４ｂは第１図に示すものと同一の要素
を示すものである。 1a, 1b, 1e, 1f, 2a, 2 in Figure 2
b, 4a and 4b indicate the same elements as shown in FIG.
流入口１ａから流体が導入されると、バンド片
２は波状に振動するが、バンド片２が振動する際
に形成される波形は上流側と下流側とでは必ずし
も同一ではない。 When fluid is introduced from the inlet 1a, the band piece 2 vibrates in a wave-like manner, but the waveforms formed when the band piece 2 vibrates are not necessarily the same on the upstream and downstream sides.
即ち、流量が０であるときは曲線２′で示す如
く、上流側の波長λ1′と下流側の波形λ2′とは略等
しいが、流れが生じると曲線２″で示す如く、下
流側の波長λ2″は上流側の波長λ1″より短くなり、
バンド片２の固定軸２ｂ付近の部分は流れによつ
て下流側に押し流され、その波形は流体の導入前
の波形に比べて下流側にふくらむ傾向があり、さ
らには曲線２として示す如く固定軸２ｂより下
流に吹き流されることもある。 That is, when the flow rate is 0, the wavelength λ 1 ' on the upstream side and the waveform λ 2 ' on the downstream side are approximately equal, as shown by curve 2'', but when a flow occurs, the wavelength λ 1 ' on the downstream side is approximately equal, as shown by curve 2''. The wavelength λ 2 ″ of is shorter than the wavelength λ 1 ″ of the upstream side,
The part of the band piece 2 near the fixed shaft 2b is swept downstream by the flow, and its waveform tends to swell downstream compared to the waveform before the introduction of the fluid, and as shown by curve 2, the fixed shaft It may also be blown downstream from 2b.
そのためバンド片の下流側固定部は上記膨出部
４ａ，４ｂが設けられていないと広角度にわたり
屈曲せしめられるのでバンド片２の振動により短
時間内で疲労を生じ、遂には破壊されて仕舞う。 For this reason, if the bulging portions 4a and 4b were not provided, the downstream fixing portion of the band piece would be bent over a wide angle, causing fatigue within a short period of time due to the vibration of the band piece 2, and would eventually break.
下流側固定軸２ｂを筐体内壁１ｃ，１ｄに固着
せず、回動自在に軸支することによつて幾分はこ
れを緩和することも可能であるが、パイプライン
中で休むことなく使用される場合、遅かれ早かれ
このような切断事故を免れるものではない。 This can be alleviated somewhat by supporting the downstream fixed shaft 2b rotatably without fixing it to the inner walls 1c and 1d of the housing, but it is also possible to use it without resting in the pipeline. If this happens, sooner or later such a cutting accident will occur.
膨出部４ａ，４ｂはかかる問題点に対処するた
めに設けたものであり、固定軸２ｂ付近のバンド
片の振動範囲を限定し、広角度にわたる屈曲を抑
え、その波形を一定に保つ作用があるので下流側
バンド片固定部の疲労破壊を防止することができ
る。 The bulges 4a and 4b are provided to solve this problem, and have the effect of limiting the vibration range of the band piece near the fixed shaft 2b, suppressing bending over a wide angle, and keeping the waveform constant. Therefore, fatigue failure of the downstream band piece fixing portion can be prevented.
本発明は叙上の如く構成されるから、本発明に
よるときは、簡単な構成でありながらバンド片の
疲労破壊が防止され、長時間の使用に耐え得る優
れたバンド型流量計を提供し得るものである。 Since the present invention is constructed as described above, it is possible to provide an excellent band-type flowmeter that has a simple construction but prevents fatigue failure of the band pieces and can withstand long-term use. It is something.
尚、本発明の構成は叙上の実施例に限定される
ものではなく、特に膨出部の形状についていえば
上記実施例では上流側がなだらかな斜面をなす丘
状のものを示したが、これは三角形状、半円状、
正弦波状等々とすることができ、膨出部の高さ、
長さ、取り付け位置等も本発明の目的の範囲内で
自由に設計変更できるものであり、本発明はそれ
らの一切を包摂するものである。 Note that the configuration of the present invention is not limited to the above-mentioned embodiments, and in particular, with regard to the shape of the bulge, in the above-mentioned embodiments, a hill-like shape with a gentle slope on the upstream side was shown. is triangular, semicircular,
It can be sinusoidal, etc., the height of the bulge,
The length, mounting position, etc. can be freely changed within the scope of the purpose of the present invention, and the present invention encompasses all of them.
第１図は本発明にかかる流量計の一実施例を示
す一部破断斜視図、第２図は膨出部の作用説明図
である。
１……筐体、２……バンド片、２ａ，２ｂ……
固定軸、３……検出器、４ａ，４ｂ……膨出部。
FIG. 1 is a partially cutaway perspective view showing an embodiment of a flowmeter according to the present invention, and FIG. 2 is an explanatory diagram of the function of a bulging portion. 1... Housing, 2... Band piece, 2a, 2b...
Fixed shaft, 3...detector, 4a, 4b...bulge.
Claims (1)
いて上流側と下流側の両端辺を固定されその長さ
が流路中心線に沿つて測つた上記両固定位置間の
距離よりも長く上記流路内に屈曲させて設けられ
上記流路内を通過する流体によつて波状に振動せ
しめられる帯状の薄く且つ柔軟なバンド片と、上
記バンド片の振動数を検出する検出器とから構成
される流量計に於て、バンド片の固定軸と平行な
筐体壁の下流側バンド片固定部と対向する部分に
バンド片の振幅を限定する膨出部を設けたことを
特徴とするバンド型流量計。1 A casing with a flow path inside, and a case in which both the upstream and downstream end sides of the flow path are fixed, and the length thereof is longer than the distance between the two fixed positions as measured along the center line of the flow path. Consisting of a thin and flexible band piece that is bent in the flow path and vibrates in a wave-like manner by the fluid passing through the flow path, and a detector that detects the frequency of the band piece. A flowmeter according to the present invention, characterized in that a bulge portion for limiting the amplitude of the band piece is provided in a part of the housing wall parallel to the fixing axis of the band piece, facing the downstream side band piece fixing part. type flow meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14990582A JPS5940118A (en) | 1982-08-31 | 1982-08-31 | Band type flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14990582A JPS5940118A (en) | 1982-08-31 | 1982-08-31 | Band type flow meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5940118A JPS5940118A (en) | 1984-03-05 |
| JPS633246B2 true JPS633246B2 (en) | 1988-01-22 |
Family
ID=15485158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14990582A Granted JPS5940118A (en) | 1982-08-31 | 1982-08-31 | Band type flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5940118A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0266878U (en) * | 1988-11-01 | 1990-05-21 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE35114E (en) * | 1988-06-10 | 1995-12-12 | Measurement Technology International | Fluid flow meter |
| USRE36658E (en) * | 1988-06-29 | 2000-04-18 | Measurement Technology International | Fluid flow meter |
| JP2860126B2 (en) * | 1989-12-26 | 1999-02-24 | メージャーメント・テクノロジー・インターナショナル | Fluid flow meter |
| US5390542A (en) * | 1993-12-21 | 1995-02-21 | Measurement Technology International | Membrane for a fluid flow meter |
-
1982
- 1982-08-31 JP JP14990582A patent/JPS5940118A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0266878U (en) * | 1988-11-01 | 1990-05-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5940118A (en) | 1984-03-05 |
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