JPH0339692Y2 - - Google Patents
Info
- Publication number
- JPH0339692Y2 JPH0339692Y2 JP1985154710U JP15471085U JPH0339692Y2 JP H0339692 Y2 JPH0339692 Y2 JP H0339692Y2 JP 1985154710 U JP1985154710 U JP 1985154710U JP 15471085 U JP15471085 U JP 15471085U JP H0339692 Y2 JPH0339692 Y2 JP H0339692Y2
- Authority
- JP
- Japan
- Prior art keywords
- curved
- flow tube
- pipe part
- tube
- coriolis force
- 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
- 238000005192 partition Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000000638 solvent extraction Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 7
- 230000000452 restraining effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 206010016256 fatigue Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、コリオリ力式質量流量計の構造の改
良に関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in the structure of a Coriolis force mass flowmeter.
従来技術
流管を流れる流体流に対して、振動を与える
と、流体流の流れの向きと、流管の振動軸とに対
して直角方向にコリオリの力が発生し、このコリ
オリの力が振動周波数と流体の質量流量に比例す
ることが知られており、特開昭54−52570号公報、
及び特開昭59−92314号公報には、この原理に基
づいた質量流量計が開示されている。この従来例
は支持部材に対して、直交する第２軸を対象軸と
する湾曲管を支持部材における固着点を結んだ第
１軸まわりに、固有振動数で駆動することにより
生ずる第２軸まわりのコリオリの力に比例した捩
り振動の捩りトルクの大きさを測定して質量流量
を求めるものである。後者（特開昭59−92314号
公報）は支持部材を流管に置き替えて仕切り板で
仕切り、湾曲管面を平行関係において対向して反
対位相で駆動するものであり、湾曲管の各々流入
例、流出例の流管から等距離にある近傍で支持板
で固着されている。Prior Art When vibration is applied to a fluid flow flowing through a flow tube, Coriolis force is generated in a direction perpendicular to the direction of the fluid flow and the vibration axis of the flow tube, and this Coriolis force causes vibration. It is known that the frequency is proportional to the mass flow rate of the fluid.
and Japanese Unexamined Patent Publication No. 59-92314 disclose a mass flowmeter based on this principle. In this conventional example, a curved tube whose symmetrical axis is a second axis perpendicular to the support member is driven around a first axis connecting fixed points on the support member at a natural frequency. The mass flow rate is determined by measuring the magnitude of the torsional torque of torsional vibration that is proportional to the Coriolis force. The latter (Japanese Unexamined Patent Publication No. 59-92314) replaces the support member with a flow tube, partitions it with a partition plate, and drives the curved tube surfaces in parallel with each other in opposite phases. For example, it is fixed with a support plate in the vicinity of the same distance from the flow pipe of the outflow example.
解決しようとする問題点
上述の従来例においては、湾曲管を各々支持部
材または流管に溶接により固着している。後者の
例では支持板との固着も同様に溶着している。湾
曲管は検出感度を高めるため、薄肉管を用いてい
るため熱容量が小さく、溶接金属は湾曲管母材と
溶融し、特殊な熱処理状態となり、その組織は母
材と異なり溶接われ、ぜい性化等をもたらし易
く、これを防ぐための熱処理は工数のかかるもの
で、満足な熱処理は困難である。これらの溶接部
分は固有振動数で駆動される場合の応力が集中す
る部分でもあるため疲労破断をおこし易いという
問題点があつた。Problems to be Solved In the conventional example described above, each curved tube is fixed to a support member or a flow tube by welding. In the latter example, the support plate is similarly welded. In order to increase detection sensitivity, curved pipes use thin-walled pipes, so their heat capacity is small, and the weld metal melts with the base material of the curved pipe, resulting in a special heat treatment state. Heat treatment to prevent this is labor-intensive and difficult to perform satisfactorily. Since these welded parts are also parts where stress is concentrated when driven at the natural frequency, there is a problem in that they are susceptible to fatigue fracture.
問題解決のための手段
本考案は上述の問題点を解説するためになされ
たもので、上述の固着部分を管継手とか低温接着
等の非溶着手段で行うものである。Means for Solving the Problem The present invention was made to solve the above-mentioned problem, and the above-mentioned fixing portion is performed by a non-welding means such as a pipe joint or low-temperature bonding.
実施例
第１図は、本考案によるコリオリ力式流量計の
一実施例を説明するための斜視図で、図中、１は
流管、２及び３は該流管１を図示しない被測定流
体管路に接続するためのフランジ、４及び５は管
路１内に設けられた仕切板、６〜９は管路１の管
壁に設けられたボス、１０，１１は湾曲管、１２
は支持板（振動固定板）、１３，１４はセンサ板
部材で、周知のように、フランジ２から流管１内
に導入された被測定流体は、該流管１内の仕切板
４で仕切られて湾曲管１０，１１に導かれ、該湾
曲管１０，１１を通して再度流管１に導かれ、該
流管１内において仕切板５によつて仕切板４方向
への流れが阻止され、フランジ３を通して図示し
ない被測定流体管路に流出される。而して、コリ
オリ力式流量計は、前述のようにして湾曲管内を
流体が流れる時に該湾曲管に働くコリオリの力を
検出して被測定流体の質量流量を計測するもので
あり、実際には湾曲管に働く捩りトルクを検出し
ている。換言すれば、湾曲管１１において、支持
板における固着点P1とP2を結んだ第１の軸Ｐに
直交する第２軸Ｑに対して軸対称に該湾曲管１１
を配設し、該湾曲管の流入口及び流出口に働くコ
リオリの力の偶力によつて該湾曲管が第２軸Ｑの
まわりに旋回する旋回角度をセンサ板部材１３，
１４上のセンサによつて検出して計測するもので
ある。而して、上述のごときコリオリ力式流量計
において、従来は、湾曲管１０，１１を溶接等に
よつて支持板に固着していたが、前述のように湾
曲管としては検出感度を高めるため薄肉管を用い
ており、そのため、熱容量が小さく、満足な熱処
理を行うことが難しかつた。しかし、溶接部分は
固有振動数で駆動される場合に応力が集中する部
分でもあるため疲労破断をおこし易かつた。本考
案は、上述のごとき従来技術の欠点を解消するた
めになされたもので、前記湾曲管に溶接等を施す
ことなく、該湾曲管を流管及び支持板に固着でき
るようにしたものである。Embodiment FIG. 1 is a perspective view for explaining an embodiment of a Coriolis force type flowmeter according to the present invention. Flanges for connecting to the pipe line, 4 and 5 are partition plates provided in the pipe line 1, 6 to 9 are bosses provided on the pipe wall of the pipe line 1, 10 and 11 are curved pipes, 12
1 is a support plate (vibration fixing plate), 13 and 14 are sensor plate members, and as is well known, the fluid to be measured introduced into the flow tube 1 from the flange 2 is partitioned by the partition plate 4 in the flow tube 1. is guided to the curved tubes 10 and 11, and then guided to the flow tube 1 again through the curved tubes 10 and 11. Within the flow tube 1, the flow in the direction of the partition plate 4 is blocked by the partition plate 5, and the flange 3 and flows out into a measured fluid conduit (not shown). The Coriolis force flowmeter measures the mass flow rate of the fluid to be measured by detecting the Coriolis force acting on the curved pipe when the fluid flows through the curved pipe as described above. detects the torsional torque acting on the curved pipe. In other words , in the curved tube 11, the curved tube 11
The sensor plate member 13 detects the turning angle at which the curved tube turns around the second axis Q due to the Coriolis force couple acting on the inlet and outlet of the curved tube.
It is detected and measured by the sensor on 14. In the Coriolis force flowmeter as described above, the curved tubes 10 and 11 were conventionally fixed to the support plate by welding or the like, but as mentioned above, the curved tubes were fixed to the support plate in order to increase the detection sensitivity. Since a thin-walled tube is used, its heat capacity is small, making it difficult to perform satisfactory heat treatment. However, since the welded part is also a part where stress is concentrated when driven at the natural frequency, fatigue fracture is likely to occur. The present invention has been made to solve the above-mentioned drawbacks of the prior art, and allows the curved tube to be fixed to the flow tube and the support plate without welding or the like to the curved tube. .
第２図は、本考案の一実施例を説明するための
要部（第１図のＡ部）拡大断面図で、図中、１は
流管、６はボス、１０湾曲曲管、１２は支持板
で、これらは第１図に示したものと同一物を示し
ており、ボス６は流管１に溶接されている。第２
図において、A1は湾曲管を流管に固着する場合
の構造、A2は湾曲管を支持板に固着する場合の
構造を示し、２０はボス６に螺着し湾曲管１０の
拡大部１０′を抑える抑え部材、２１はＯリング
パツキン、２２は支持板１２に固着された湾曲管
１０の支持部材、２３は固定ナツト、２４は袋ナ
ツト、２５はねじのゆるみ止め部材で本実施例で
は喰込み形スプリングワツシヤーを示し、抑え部
材２０，固定ナツト２３、袋ナツト２４に使用す
る。２６は湾曲管１０の固定リングで、該固定リ
ングは湾曲管１０の振動の支点となるもので図示
の形状にこだわらない。本実施例においては、袋
ナツト２４、固定リング２６、スプリングワツシ
ヤー２５、固定部材２２、固定ナツト２３を湾曲
管１０に挿入し、固定部材２２を固定板１２にス
プリングワツシヤー２５を介して固定ナツト２３
で固定する。次に湾曲管１０に抑え部材２０およ
びＯリング２１を挿入し、然る後湾曲管の端部を
１０′のように拡大し、ボス６の内部に湾曲管拡
大部１０′を挿入し抑え部材２０によつてＯリン
グ２１を介して湾曲管１０を抑え固定する。湾曲
管端部に拡大部１０′を設けることはボス６部か
らの湾曲管の離脱防止効果がある。この時、抑え
部材２０のゆるみ止めにスプリングワツシヤー２
５を用いる。以上のように、湾曲管１０を流管１
に固着された後、固定リング２６を固定部材２２
の座にはめ込み、袋ナツト２４で締め付けて湾曲
管を固定する。湾曲管１１についても上述のよう
に組立てられる。 FIG. 2 is an enlarged sectional view of the main part (part A in FIG. 1) for explaining one embodiment of the present invention, in which 1 is a flow tube, 6 is a boss, 10 is a curved tube, and 12 is a The support plates are identical to those shown in FIG. 1, the bosses 6 being welded to the flow tube 1. Second
In the figure, A 1 shows the structure for fixing the curved tube to the flow tube, A 2 shows the structure for fixing the curved tube to the support plate, and 20 shows the enlarged part 10 of the curved tube 10 screwed onto the boss 6. 21 is an O-ring gasket, 22 is a support member for the curved tube 10 fixed to the support plate 12, 23 is a fixing nut, 24 is a cap nut, and 25 is a screw locking member in this embodiment. A biting type spring washer is shown and is used for the restraining member 20, fixing nut 23, and cap nut 24. Reference numeral 26 denotes a fixing ring for the curved tube 10, and the fixing ring serves as a fulcrum for the vibration of the curved tube 10, and is not limited to the illustrated shape. In this embodiment, a cap nut 24, a fixing ring 26, a spring washer 25, a fixing member 22, and a fixing nut 23 are inserted into the curved pipe 10, and the fixing member 22 is fixed to the fixing plate 12 via the spring washer 25. Natsu 23
Fix it with. Next, insert the restraining member 20 and O-ring 21 into the curved pipe 10, and then enlarge the end of the curved pipe as shown in 10', insert the curved pipe enlarged part 10' into the inside of the boss 6, and insert the restraining member 20 into the bent pipe 10. 20 holds and fixes the curved tube 10 via an O-ring 21. Providing the enlarged portion 10' at the end of the curved tube has the effect of preventing the curved tube from separating from the boss 6 portion. At this time, a spring washer 2 is used to prevent the restraining member 20 from loosening.
5 is used. As described above, the curved tube 10 is connected to the flow tube 1
After being fixed to the fixing member 22, the fixing ring 26 is fixed to the fixing member 22.
Fit the curved pipe into the seat and tighten with the cap nut 24 to fix the curved pipe. The curved pipe 11 is also assembled as described above.
第３図は、湾曲管と流管との接続に市販の喰込
み継手を使用した実施例で、２７は市販の喰込継
手、２７ａは継手本体、２７ｂは袋ナツト、２７
ｃはスリーブで、その他は第１図と同一番号が付
してある。このようにするとA1部に市販品が使
えるのでコストダウン、メンテナンスの容易化が
期待出来る。 Fig. 3 shows an example in which a commercially available bite-in joint is used to connect the curved pipe and the flow tube, 27 is a commercially available bite-in joint, 27a is the joint body, 27b is a cap nut, 27
c is a sleeve, and the other parts are given the same numbers as in FIG. In this way, a commercially available product can be used for the A1 part, which can reduce costs and ease maintenance.
効 果
以上の説明から明らかなように、本考案による
と、湾曲管に溶接処理を施すことなく該湾曲管を
支持部及び流管に固着することができるので、湾
曲管が疲労破断する恐れがなく、また、湾曲管の
交換等が容易となり、メインテナンスが非常に楽
になる等の利点がある。Effects As is clear from the above explanation, according to the present invention, the curved tube can be fixed to the support part and the flow tube without welding the curved tube, so there is no risk of fatigue rupture of the curved tube. In addition, there are advantages such as easy replacement of the curved pipe, and very easy maintenance.
第１図は、本考案が適用されたコリオリ力式流
量計の一実施例を説明するための斜視図、第２図
及び第３図は、それぞれ第１図のＡ部の変形実施
例を示す断面図である。
１……流管、２，３……フランジ、４，５……
仕切板、６〜９……ボス、１０，１１……湾曲
管、１０′……拡大部、１２……支持板、１３，
１４……発振子板、２０……抑え部材、２１……
Ｏリング、２２……固定部材、２４……袋ナツ
ト、２５……スプリングワツシヤー、２６……固
定リング、２７……喰込み継手。
FIG. 1 is a perspective view for explaining an embodiment of a Coriolis force flowmeter to which the present invention is applied, and FIGS. 2 and 3 each show a modified embodiment of part A in FIG. 1. FIG. 1... Flow tube, 2, 3... Flange, 4, 5...
Partition plate, 6-9... Boss, 10, 11... Curved pipe, 10'... Enlarged part, 12... Support plate, 13,
14... Oscillator plate, 20... Suppressing member, 21...
O-ring, 22...fixing member, 24...cap nut, 25...spring washer, 26...fixing ring, 27...bite joint.
Claims (1)
壁に前記仕切板を挟んで開口し、流管軸に垂直
な第２軸に軸対称で同形等寸の平行して配設さ
れる湾曲管と、前記開口部近傍で平行した前記
湾曲管を固着する支持板とからなり、前記平行
な湾曲管を支持点上の第１軸まわりに反対位相
で交番駆動し、該駆動により前記湾曲管の第２
軸まわりに生ずる湾曲管のコリオリの力による
変位から質量流量を求める流量計において、前
記湾曲管を流管壁および支持板に対する固着を
非溶着手段で行うことを特徴とするコリオリ力
式流量計。 (2) 前記湾曲管の下端部が前記流管内において拡
大されて該流管壁に管継手にて固着されている
ことを特徴とする実用新案登録請求の範囲第(1)
項に記載のコリオリ力式流量計。 (3) 前記湾曲管をＵ字管部と該Ｕ字管部開口に接
続する直管部とで構成し、該Ｕ字管部と直管部
との接続を管継手により行ない、前記直管部開
口を喰込み継手により流管壁に固着したことを
特徴とする実用新案登録請求の範囲第(1)項に記
載のコリオリ力式流量計。[Claims for Utility Model Registration] (1) A flow tube having a partition plate for partitioning the flow, and an opening in the flow tube wall with the partition plate interposed therebetween, and having the same shape and being axially symmetrical about a second axis perpendicular to the flow tube axis. Consisting of curved tubes of equal size arranged in parallel, and a support plate that fixes the parallel curved tubes near the opening, the parallel curved tubes are arranged in opposite phases around a first axis on the support point. and the second curved pipe is alternately driven by the
1. A Coriolis force flowmeter that determines mass flow rate from displacement of a curved tube around an axis due to Coriolis force, characterized in that the curved tube is fixed to a flow tube wall and a support plate by non-welding means. (2) Utility model registration claim No. (1) characterized in that the lower end of the curved tube is expanded within the flow tube and fixed to the flow tube wall with a pipe joint.
The Coriolis force flowmeter described in . (3) The curved pipe is composed of a U-shaped pipe part and a straight pipe part connected to the opening of the U-shaped pipe part, and the U-shaped pipe part and the straight pipe part are connected by a pipe joint, and the straight pipe part is connected to the opening of the U-shaped pipe part. 2. The Coriolis force type flowmeter according to claim (1) of the utility model registration, characterized in that the opening is fixed to the flow tube wall by a biting joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985154710U JPH0339692Y2 (en) | 1985-10-09 | 1985-10-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985154710U JPH0339692Y2 (en) | 1985-10-09 | 1985-10-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6262922U JPS6262922U (en) | 1987-04-18 |
| JPH0339692Y2 true JPH0339692Y2 (en) | 1991-08-21 |
Family
ID=31074753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985154710U Expired JPH0339692Y2 (en) | 1985-10-09 | 1985-10-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0339692Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0769204B2 (en) * | 1987-04-20 | 1995-07-26 | トキコ株式会社 | Vibration measuring device |
| US7127815B2 (en) * | 2001-11-26 | 2006-10-31 | Emerson Electric Co. | Method of manufacturing a Coriolis flowmeter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58178217A (en) * | 1982-04-13 | 1983-10-19 | Yokogawa Hokushin Electric Corp | Mass flowmeter |
-
1985
- 1985-10-09 JP JP1985154710U patent/JPH0339692Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58178217A (en) * | 1982-04-13 | 1983-10-19 | Yokogawa Hokushin Electric Corp | Mass flowmeter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6262922U (en) | 1987-04-18 |
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