JPH01301118A - Orifice flowmeter - Google Patents
Orifice flowmeterInfo
- Publication number
- JPH01301118A JPH01301118A JP13305588A JP13305588A JPH01301118A JP H01301118 A JPH01301118 A JP H01301118A JP 13305588 A JP13305588 A JP 13305588A JP 13305588 A JP13305588 A JP 13305588A JP H01301118 A JPH01301118 A JP H01301118A
- Authority
- JP
- Japan
- Prior art keywords
- conduit
- fluid
- measured
- orifice plate
- orifice
- 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
Links
- 239000012530 fluid Substances 0.000 claims abstract description 23
- 238000003466 welding Methods 0.000 claims abstract description 10
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は例えば真空断熱空間に装備され極低温流体等
の流量を計測するオリフィス流量計に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an orifice flowmeter that is installed in, for example, a vacuum insulation space and measures the flow rate of a cryogenic fluid or the like.
第２図は例えば発明協会公開技報で分枝番号８６−１６
１６１号に示された従来のオリフィス流量計を示す断面
図であり、図において、（１）および（２）は被測定流
体の上流側流路および下流側流路をなす管路Ｉと管路ｎ
、（８）は管路１と管路■（２）の間。Figure 2 is an example of branch number 86-16 in the Technical Report published by Japan Institute of Invention and Innovation.
161 is a cross-sectional view showing a conventional orifice flowmeter shown in No. 161, in which (1) and (2) are a pipe line I and a pipe line forming an upstream flow path and a downstream flow path of the fluid to be measured. n
, (8) is between pipe 1 and pipe ■(2).
で、かつ管路Ｉ側（１）の端部に設けられ管路■（２）
と相対する側に嵌合面（３ａ）を有した上流側のフラン
ジ、（４）は管路■（１）と管路■（２）の間で、かつ
管路■（２）側の端部に設けられ管路１（１）と相対す
る側に嵌合面（４ａ）を有した下流側のフランジ、（５
）はフランジ（８）と（４）間に設置され当接する面に
フランジ（８）および（４）の嵌合面（３ａ）および（
伍）にそれぞれ嵌合する嵌合面（５ａ）および（５ｂ）
を有したオリフィス板、（６ａ）および（６ｂ）はオリ
フィス板（６）に近い位置の管路Ｉ（１）および管路■
（２）の管内とそれぞれ連通して配設されたポートで、
それぞれの管内における被測定流体の圧力取出口をなし
ている。（７ａ）および（７ｂ）はフランジ（８）と（
４）でオリフィス（５）をはさんで装備したのちに各当
接部外周を封止する溶接部で真空雰囲気での被測定流体
の漏洩に対処している、このように構成されたオリフィ
ス流量計は、例えば極低温流体の流量計測用として真空
断熱空間内に設置され被測定流体が上流側の管路（１）
からオリフィス板（６）を通って下流側の管路（２）へ
流れ、流体はオリフィス穴を通る際に流量の自乗に比例
する圧力損失を発生する。この圧力損失、即ちオリフィ
ス板（５）通過前後の差圧をボー） （６ａ）および（
６ｂ）で取出し差圧変換器（図示せず）に導き差圧計測
がされこれにより流量を検知している。and is installed at the end of the pipe I side (1) and the pipe ■ (2)
The upstream flange (4) has a fitting surface (3a) on the side opposite to the flange (4) between the conduit ■(1) and the conduit ■(2), and the end on the conduit ■(2) side. a downstream flange (5) having a fitting surface (4a) on the side facing the pipe line 1 (1);
) is installed between flanges (8) and (4), and the fitting surfaces (3a) and (
5) Fitting surfaces (5a) and (5b) that fit respectively
The orifice plates (6a) and (6b) are located close to the orifice plate (6) and the conduit I (1) and the conduit ■
(2) Ports arranged to communicate with the inside of the pipe,
It serves as a pressure outlet for the fluid to be measured in each pipe. (7a) and (7b) are flange (8) and (
4) The orifice (5) is installed between the orifices (5) and then the welded part seals the outer periphery of each contact part to prevent leakage of the fluid to be measured in a vacuum atmosphere. The meter is installed in a vacuum insulation space for measuring the flow rate of cryogenic fluid, for example, and the fluid to be measured is connected to the upstream pipe line (1).
The fluid flows from the orifice plate (6) to the downstream conduit (2), and as the fluid passes through the orifice hole, it generates a pressure loss proportional to the square of the flow rate. This pressure loss, that is, the differential pressure before and after passing through the orifice plate (5) is calculated by (6a) and (
6b), the fluid is taken out and guided to a differential pressure converter (not shown) to measure the differential pressure, thereby detecting the flow rate.
従来のオリフィス流量計は以上のように構成されている
ので、溶接の際オリフィス板に溶接による熱歪が発生し
被測定流体の流量計測に誤差を生じる課題があった。Since the conventional orifice flowmeter is configured as described above, there has been a problem that thermal distortion occurs in the orifice plate during welding due to welding, causing an error in measuring the flow rate of the fluid to be measured.
実験結果では例えば４．５に、１０気圧のヘリウムガス
の流量１０ ｇ ／ Ｓｅｃ程度を計測する場合オリフ
ィス直径は約３ ｖｍ 、オリフィス板板厚は１．５Ｍ
程度と小径で、かつ薄くなり溶接時の熱影響でオリフィ
ス板に熱歪が発生しこのため１％以上の計測誤差が確認
されている。According to experimental results, for example, when measuring a flow rate of 10 g/sec of helium gas at 10 atm, the orifice diameter is approximately 3 vm, and the orifice plate thickness is 1.5 m.
As the orifice plate becomes smaller in diameter and thinner, thermal distortion occurs in the orifice plate due to the heat effect during welding, and a measurement error of 1% or more has been confirmed.
この発明は上記のような課題を解消するためになされた
もので、溶接の際オリフィス板に熱歪影響がなく被測定
流体の流量を正確に計測できるオリフィス流量計を得る
ことを目的とする。The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide an orifice flowmeter that can accurately measure the flow rate of a fluid to be measured without causing thermal distortion effects on the orifice plate during welding.
この発明に係るオリフィス流量計は、継ぎ部を有し被測
定流体の流路を形成する管路と、この管路の継ぎ部に設
けられオリフィス板を流路内に保持するとともにその外
周部で溶接によって封止する連結保持具とで構成したも
のである、〔作用〕
この発明のオリフィス流量針における連結保持具はオリ
フィス板の熱による歪を防止する。The orifice flowmeter according to the present invention includes a conduit that has a joint and forms a flow path for a fluid to be measured, and an orifice plate that is provided at the joint of the conduit and that holds the orifice plate in the flow path. [Function] The connecting holder for the orifice flow rate needle of the present invention prevents the orifice plate from being distorted due to heat.
以下この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図はこの発明におけるオリフィス流量計の一実施例
を示す断面図である。図において、（８）および（９）
は被測定流体の上流側流路および下流側流路をなす管路
■と管路■、α０）は管路■（８）と管路■（９）の間
で、かつ管路Ｉ（８）側の端部に設けられ管路（９）と
相対する側の内側面には嵌合面（１０ａ）が、外周側は
筒形で内周がメネジ（１０ｂ）をなす突出部で形成され
た上流側フランジ、０１）は管路Ｉ（８）と管路■（９
）の間で、かつ管路■（９）側の端部に設けられ管路１
（８）と相対する側に嵌合面（ｌｌａ）が、外周面はフ
ランジ輛のメネジ（１０ｂ）と螺合するオネジ（ｌｌｂ
）で形成された下流側のフランジ、（１ｚはフランジα
＠と００間に内設され当接する面にフランジαＱおよび
αυの嵌合面（１０ａ）および（ｌｌａ）にそれぞれ嵌
合する嵌合面（１２ａ）および（１２ｂ）を有したオリ
フィス板、（１３ａ）および（１３ｋ））はオリフィス
板ｆ１２）に近い位置の管路１（８）および管路■（９
）の管内とそれぞれ連通して配設されたポートで、それ
ぞれ管内に蒔ける被測定流体の圧力取出口をなしている
。０（イ）はフランジαＯ）とｑυを螺合結合後に螺合
部ネジ終端を封止する溶接部で真空雰囲気での被測定流
体漏洩に対処している。FIG. 1 is a sectional view showing an embodiment of an orifice flowmeter according to the present invention. In the figure, (8) and (9)
is the pipe ■ and pipe ■ which form the upstream flow path and the downstream flow path of the fluid to be measured, α0) is between the pipe ■ (8) and the pipe ■ (9), and the pipe I (8) ) A fitting surface (10a) is provided on the inner surface of the side facing the pipe (9), and the outer circumferential side is formed of a cylindrical protrusion and the inner circumference is a female thread (10b). The upstream flange 01) connects pipe I (8) and pipe ■ (9).
) and at the end of the pipe (9) side.
The fitting surface (lla) is on the side opposite to (8), and the outer peripheral surface is a male screw (llb) that screws into the female screw (10b) of the flange.
), (1z is the flange α
an orifice plate (13a) having fitting surfaces (12a) and (12b) that fit into the fitting surfaces (10a) and (lla) of flanges αQ and αυ, respectively, on the abutting surfaces disposed between @ and 00; ) and (13k)) are pipe 1 (8) and pipe ■ (9) located near the orifice plate f12).
) are arranged in communication with the inside of the pipe, respectively, and serve as a pressure outlet for the fluid to be measured that can be injected into the pipe. 0(A) is a welding part that seals the threaded end of the threaded part after the flanges αO) and qυ are screwed together, and this is to prevent leakage of the fluid to be measured in a vacuum atmosphere.
以上の構成品で、フランジα０）および０υと溶接部１
４）とが連結保持具α９を構成し管路１（８）と管路■
（９）とを結合させている。With the above components, flanges α0) and 0υ and welded part 1
4) constitutes the connection holder α9, and the conduit 1 (8) and conduit ■
(9) are combined.
このように構成されたオリフィス流量計は上記説明のと
おりオリフィス板ａｚの装着およびフランジ（至）と０
υとの結合がメネジ（１０ｂ）とオネジ（ｌｌｂ）とさ
の螺合締め込みで容易になれるとともに、オリフィス板
（１力と接触することなく継ぎ部の封止処置、即ち溶接
ができる。As explained above, the orifice flowmeter configured in this way is equipped with the orifice plate az and the flange (to) and zero.
υ can be easily connected by tightening the female screw (10b) and male screw (llb), and the joint can be sealed, that is, welded, without coming into contact with the orifice plate (1).
なお、上記実施例では継ぎ部における連結保持具は連結
方法として螺合による方法を用いたが、螺合面をそれぞ
れ嵌合面として嵌合による連結をなし同様の溶接による
封止としても良い。Incidentally, in the above embodiment, the connecting holder at the joint part uses a screwing method as a connecting method, but the screwing surfaces may be respectively used as fitting surfaces to connect by fitting and sealing by similar welding.
以上のように、この発明によれば継ぎ部を有し被測定流
体の流路を形成する管路と、この管路の継ぎ部に設けら
れオリフィス板を流路内に保持するとともにその外周部
で溶接によって封止する連結保持具とで構成したので溶
接の際オリフィス板に熱歪影響がなく正確な被測定流体
の流量を計測できるオリフィス流量計を得られる効果が
ある。As described above, according to the present invention, there is provided a conduit having a joint portion and forming a flow path for a fluid to be measured, and an orifice plate provided at the joint portion of the conduit to hold the orifice plate in the flow path, and the outer periphery of the conduit. Since the connecting holder is sealed by welding, there is no effect of thermal distortion on the orifice plate during welding, and an orifice flowmeter that can accurately measure the flow rate of the fluid to be measured can be obtained.
第１図はこの発明の一実施例によるオリフィス流量計を
示す断面図、第２図は従来のオリフィス流量針を示す断
面図である。図において、（８）は管路［、（９）は管
路■、α２はオリフィス板、（１３＆）および（１３ｂ
）はボート、０．５１は連結保持具である。
なお、図中、同一符号は同一、又は相当部分を示す。FIG. 1 is a sectional view showing an orifice flow meter according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional orifice flow needle. In the figure, (8) is the pipe [, (9) is the pipe ■, α2 is the orifice plate, (13&) and (13b
) is a boat, and 0.51 is a connecting holder. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
管路の上記継ぎ部に設けられオリフィス板を上記流路内
に保持するとともにその外周部で溶接によつて封止する
連結保持具とを備え、上記被測定流体の上記オリフィス
上流側と下流側との差圧を検知して上記流体の流量計測
することを特徴としたオリフィス流量計。A conduit having a joint and forming a flow path for the fluid to be measured, and an orifice plate provided at the joint of this conduit to hold it in the flow path and sealing the outer periphery by welding. An orifice flowmeter comprising a connecting holder, and measuring the flow rate of the fluid by detecting a differential pressure between the upstream side and the downstream side of the orifice of the fluid to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13305588A JPH01301118A (en) | 1988-05-30 | 1988-05-30 | Orifice flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13305588A JPH01301118A (en) | 1988-05-30 | 1988-05-30 | Orifice flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01301118A true JPH01301118A (en) | 1989-12-05 |
Family
ID=15095768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13305588A Pending JPH01301118A (en) | 1988-05-30 | 1988-05-30 | Orifice flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01301118A (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011508216A (en) * | 2007-12-17 | 2011-03-10 | ホスピラ・インコーポレイテツド | Differential pressure flow sensor assembly for monitoring drug administration and method of use thereof |
| JP2012501215A (en) * | 2008-09-02 | 2012-01-19 | ホスピラ・インコーポレイテツド | Cassette for drug delivery flow sensor assembly and method of manufacturing the same |
| JP2012516198A (en) * | 2009-01-30 | 2012-07-19 | ホスピラ・インコーポレイテツド | Cassette for differential flow sensor assembly |
| US10022498B2 (en) | 2011-12-16 | 2018-07-17 | Icu Medical, Inc. | System for monitoring and delivering medication to a patient and method of using the same to minimize the risks associated with automated therapy |
| US10166328B2 (en) | 2013-05-29 | 2019-01-01 | Icu Medical, Inc. | Infusion system which utilizes one or more sensors and additional information to make an air determination regarding the infusion system |
| US10342917B2 (en) | 2014-02-28 | 2019-07-09 | Icu Medical, Inc. | Infusion system and method which utilizes dual wavelength optical air-in-line detection |
| US10430761B2 (en) | 2011-08-19 | 2019-10-01 | Icu Medical, Inc. | Systems and methods for a graphical interface including a graphical representation of medical data |
| US10463788B2 (en) | 2012-07-31 | 2019-11-05 | Icu Medical, Inc. | Patient care system for critical medications |
| US10578474B2 (en) | 2012-03-30 | 2020-03-03 | Icu Medical, Inc. | Air detection system and method for detecting air in a pump of an infusion system |
| US10596316B2 (en) | 2013-05-29 | 2020-03-24 | Icu Medical, Inc. | Infusion system and method of use which prevents over-saturation of an analog-to-digital converter |
| US10635784B2 (en) | 2007-12-18 | 2020-04-28 | Icu Medical, Inc. | User interface improvements for medical devices |
| US10656894B2 (en) | 2017-12-27 | 2020-05-19 | Icu Medical, Inc. | Synchronized display of screen content on networked devices |
| US10850024B2 (en) | 2015-03-02 | 2020-12-01 | Icu Medical, Inc. | Infusion system, device, and method having advanced infusion features |
| US10874793B2 (en) | 2013-05-24 | 2020-12-29 | Icu Medical, Inc. | Multi-sensor infusion system for detecting air or an occlusion in the infusion system |
| US11135360B1 (en) | 2020-12-07 | 2021-10-05 | Icu Medical, Inc. | Concurrent infusion with common line auto flush |
| US11246985B2 (en) | 2016-05-13 | 2022-02-15 | Icu Medical, Inc. | Infusion pump system and method with common line auto flush |
| US11278671B2 (en) | 2019-12-04 | 2022-03-22 | Icu Medical, Inc. | Infusion pump with safety sequence keypad |
| US11324888B2 (en) | 2016-06-10 | 2022-05-10 | Icu Medical, Inc. | Acoustic flow sensor for continuous medication flow measurements and feedback control of infusion |
| US11344668B2 (en) | 2014-12-19 | 2022-05-31 | Icu Medical, Inc. | Infusion system with concurrent TPN/insulin infusion |
| US11344673B2 (en) | 2014-05-29 | 2022-05-31 | Icu Medical, Inc. | Infusion system and pump with configurable closed loop delivery rate catch-up |
| US11883361B2 (en) | 2020-07-21 | 2024-01-30 | Icu Medical, Inc. | Fluid transfer devices and methods of use |
-
1988
- 1988-05-30 JP JP13305588A patent/JPH01301118A/en active Pending
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|---|---|---|---|---|
| JP2011508216A (en) * | 2007-12-17 | 2011-03-10 | ホスピラ・インコーポレイテツド | Differential pressure flow sensor assembly for monitoring drug administration and method of use thereof |
| US10635784B2 (en) | 2007-12-18 | 2020-04-28 | Icu Medical, Inc. | User interface improvements for medical devices |
| JP2012501215A (en) * | 2008-09-02 | 2012-01-19 | ホスピラ・インコーポレイテツド | Cassette for drug delivery flow sensor assembly and method of manufacturing the same |
| JP2012516198A (en) * | 2009-01-30 | 2012-07-19 | ホスピラ・インコーポレイテツド | Cassette for differential flow sensor assembly |
| US11004035B2 (en) | 2011-08-19 | 2021-05-11 | Icu Medical, Inc. | Systems and methods for a graphical interface including a graphical representation of medical data |
| US11972395B2 (en) | 2011-08-19 | 2024-04-30 | Icu Medical, Inc. | Systems and methods for a graphical interface including a graphical representation of medical data |
| US10430761B2 (en) | 2011-08-19 | 2019-10-01 | Icu Medical, Inc. | Systems and methods for a graphical interface including a graphical representation of medical data |
| US11599854B2 (en) | 2011-08-19 | 2023-03-07 | Icu Medical, Inc. | Systems and methods for a graphical interface including a graphical representation of medical data |
| US10022498B2 (en) | 2011-12-16 | 2018-07-17 | Icu Medical, Inc. | System for monitoring and delivering medication to a patient and method of using the same to minimize the risks associated with automated therapy |
| US11376361B2 (en) | 2011-12-16 | 2022-07-05 | Icu Medical, Inc. | System for monitoring and delivering medication to a patient and method of using the same to minimize the risks associated with automated therapy |
| US11933650B2 (en) | 2012-03-30 | 2024-03-19 | Icu Medical, Inc. | Air detection system and method for detecting air in a pump of an infusion system |
| US10578474B2 (en) | 2012-03-30 | 2020-03-03 | Icu Medical, Inc. | Air detection system and method for detecting air in a pump of an infusion system |
| US10463788B2 (en) | 2012-07-31 | 2019-11-05 | Icu Medical, Inc. | Patient care system for critical medications |
| US11623042B2 (en) | 2012-07-31 | 2023-04-11 | Icu Medical, Inc. | Patient care system for critical medications |
| US10874793B2 (en) | 2013-05-24 | 2020-12-29 | Icu Medical, Inc. | Multi-sensor infusion system for detecting air or an occlusion in the infusion system |
| US10166328B2 (en) | 2013-05-29 | 2019-01-01 | Icu Medical, Inc. | Infusion system which utilizes one or more sensors and additional information to make an air determination regarding the infusion system |
| US11596737B2 (en) | 2013-05-29 | 2023-03-07 | Icu Medical, Inc. | Infusion system and method of use which prevents over-saturation of an analog-to-digital converter |
| US10596316B2 (en) | 2013-05-29 | 2020-03-24 | Icu Medical, Inc. | Infusion system and method of use which prevents over-saturation of an analog-to-digital converter |
| US11433177B2 (en) | 2013-05-29 | 2022-09-06 | Icu Medical, Inc. | Infusion system which utilizes one or more sensors and additional information to make an air determination regarding the infusion system |
| US10342917B2 (en) | 2014-02-28 | 2019-07-09 | Icu Medical, Inc. | Infusion system and method which utilizes dual wavelength optical air-in-line detection |
| US11344673B2 (en) | 2014-05-29 | 2022-05-31 | Icu Medical, Inc. | Infusion system and pump with configurable closed loop delivery rate catch-up |
| US11344668B2 (en) | 2014-12-19 | 2022-05-31 | Icu Medical, Inc. | Infusion system with concurrent TPN/insulin infusion |
| US10850024B2 (en) | 2015-03-02 | 2020-12-01 | Icu Medical, Inc. | Infusion system, device, and method having advanced infusion features |
| US11246985B2 (en) | 2016-05-13 | 2022-02-15 | Icu Medical, Inc. | Infusion pump system and method with common line auto flush |
| US11324888B2 (en) | 2016-06-10 | 2022-05-10 | Icu Medical, Inc. | Acoustic flow sensor for continuous medication flow measurements and feedback control of infusion |
| US10656894B2 (en) | 2017-12-27 | 2020-05-19 | Icu Medical, Inc. | Synchronized display of screen content on networked devices |
| US11868161B2 (en) | 2017-12-27 | 2024-01-09 | Icu Medical, Inc. | Synchronized display of screen content on networked devices |
| US11029911B2 (en) | 2017-12-27 | 2021-06-08 | Icu Medical, Inc. | Synchronized display of screen content on networked devices |
| US11278671B2 (en) | 2019-12-04 | 2022-03-22 | Icu Medical, Inc. | Infusion pump with safety sequence keypad |
| US11883361B2 (en) | 2020-07-21 | 2024-01-30 | Icu Medical, Inc. | Fluid transfer devices and methods of use |
| US11135360B1 (en) | 2020-12-07 | 2021-10-05 | Icu Medical, Inc. | Concurrent infusion with common line auto flush |
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