JP3322550B2 - Flow measurement device using duct reinforcement - Google Patents
Flow measurement device using duct reinforcementInfo
- Publication number
- JP3322550B2 JP3322550B2 JP03047096A JP3047096A JP3322550B2 JP 3322550 B2 JP3322550 B2 JP 3322550B2 JP 03047096 A JP03047096 A JP 03047096A JP 3047096 A JP3047096 A JP 3047096A JP 3322550 B2 JP3322550 B2 JP 3322550B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pipe
- smoke exhaust
- flow rate
- exhaust duct
- 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 - Fee Related
Links
Landscapes
- Measuring Volume Flow (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は発電用ボイラーの排
煙ダクト等の流量を測定するためのダクト補強を利用し
た流量計測装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow rate measuring apparatus utilizing duct reinforcement for measuring a flow rate of a smoke exhaust duct or the like of a boiler for power generation.
【0002】[0002]
【従来の技術】発電用ボイラーの排煙ダクト等の直管部
のガス流量を計測する手段として、リバース型ピトー管
等の流速計を外部から排煙ダクトに挿入し、トラバース
をしながら流速計測を行う方法がある。一例として図7
に発電用ボイラーの排煙ダクトの概略図を示し、図8に
図7におけるD−D断面である発電用ボイラーの排煙ダ
クトの断面図を示す。2. Description of the Related Art As a means for measuring a gas flow rate in a straight pipe portion such as a smoke exhaust duct of a power generation boiler, a flow meter such as a reverse type pitot tube is inserted into the smoke exhaust duct from the outside, and the flow rate is measured while traversing. There is a way to do it. FIG. 7 as an example
8 shows a schematic view of a smoke exhaust duct of the power generation boiler, and FIG. 8 shows a cross-sectional view of the smoke exhaust duct of the power generation boiler, which is a DD section in FIG.
【0003】図7,図8において、発電用ボイラーの排
煙ダクト直管部01には、ダクトを補強するための支持
パイプ02がガスの流れ方向03に複数列配置してあ
る。図中04は流速計測穴で、この流速計測穴04から
図9のリバース型ピトー管06を挿入して、図8に示す
ような任意の計測点05を上下、左右にトラバースしな
がら測定を行い、流量を求める。In FIGS. 7 and 8, a plurality of support pipes 02 for reinforcing a duct are arranged in a straight line in a flue gas exhaust duct 01 of a boiler for power generation in a gas flow direction 03. In the figure, reference numeral 04 denotes a flow velocity measurement hole, and the reverse type pitot tube 06 of FIG. 9 is inserted from the flow velocity measurement hole 04 to perform measurement while traversing an arbitrary measurement point 05 as shown in FIG. , And determine the flow rate.
【0004】図9は上記に説明のリバース型ピトー管0
6の原理を示す図で、(a)は側面図、(b)は、その
E−E断面図である。この図において、リバース型ピト
ー管06は流れ03に正対させた圧力孔07を有し、圧
力PT を取出す管と、180°逆方向の圧力孔08を有
し、圧力PS を取出す管からなり、これら管から圧力P
T とPS を取出す。FIG. 9 shows the reverse type pitot tube 0 described above.
6 (a) is a side view, and FIG. 6 (b) is an EE cross-sectional view thereof. In this figure, the reverse-type pitot tube 06 has a pressure bore 07 which directly facing the flow 03 has a pipe for taking out the pressure P T, the pressure hole 08 of the 180 ° opposite direction, taking the pressure P S tube And the pressure P
Take out the T and P S.
【0005】圧力PT と圧力PS の差は真の動圧の約2
倍であることから圧力PT と圧力P S の差を計測するこ
とで、真の動圧がわかり、流速が求められる。なお、圧
力P T と圧力PS の差はみかけの動圧であり、予め風洞
等で標準ピトー管(プラントル型)と比較し、検定す
る。[0005] Pressure PTAnd pressure PSIs about 2 of the true dynamic pressure
Pressure PTAnd pressure P SMeasuring the difference between
Thus, the true dynamic pressure is known, and the flow velocity is obtained. The pressure
Force P TAnd pressure PSThe difference is the apparent dynamic pressure,
Compare with standard Pitot tube (Prandtl type) in
You.
【0006】[0006]
【発明が解決しようとする課題】従来の図7に示すよう
な発電用ボイラーの排煙ダクト等の流量計測は支持パイ
プ02の影響で乱れが生じ、流れが十分整流されない位
置で計測を行うため、計測誤差を招いていた。The conventional flow rate measurement of a smoke exhaust duct or the like of a boiler for power generation as shown in FIG. 7 is performed at a position where flow is not sufficiently rectified due to disturbance caused by the support pipe 02. , Causing measurement errors.
【0007】又、図8に示すように流速計測穴04が1
断面当たり数ヶ所(図8では3ヶ所)有り、夫々の流速
計測穴04から任意の計測点05(図8では9点)をト
ラバースしながら流速計測を行うため大変時間を要して
いた。[0007] As shown in FIG.
There are several places (three places in FIG. 8) per cross section, and it takes a very long time to measure the flow velocity while traversing an arbitrary measurement point 05 (9 points in FIG. 8) from each flow velocity measurement hole 04.
【0008】[0008]
【課題を解決するための手段】本発明はこのような課題
を解決するために次の(1),(2)の手段を提供す
る。The present invention provides the following means (1) and (2) in order to solve such problems.
【0009】(1)発電用ボイラーの排煙ダクトの中で
リバース型ピトー管を用いて同排煙ダクト内の圧力を測
定し、同圧力より流量を求める流量計測装置であって、
前記リバース型ピトー管は、前記排煙ダクト内の補強用
支持パイプの所定の位置に、ガス流れに向く前流側圧力
孔及びそれと反対向きの後流側圧力孔を穿設すると共
に、同支持パイプ内に前記両圧力孔とそれぞれ接続する
前流側圧力取出管及び後流側圧力取出管を設けて同支持
パイプと併用したことを特徴とするダクト補強を利用し
た流量計測装置。(1) A flow rate measuring device for measuring a pressure in a smoke exhaust duct of a power generation boiler using a reverse type pitot tube in the smoke exhaust duct and obtaining a flow rate from the pressure.
The reverse-type pitot tube is provided with a front-side pressure hole facing the gas flow and a downstream-side pressure hole facing the gas flow hole at a predetermined position of the reinforcing support pipe in the smoke exhaust duct. A flow measurement device using duct reinforcement, wherein a pre-stream pressure outlet pipe and a wake side pressure outlet pipe connected to the two pressure holes are provided in a pipe and used together with the supporting pipe.
【0010】(2)上記(1)において、前記前流側圧
力孔及び後流側圧力孔は、それぞれ複数個からなり、前
記支持パイプの中心に向って所定の角度で等分となるよ
うに配置して穿設され、同数からなる前流側圧力取出管
及び後流側圧力取出管にそれぞれ接続されていることを
特徴とするダクト補強を利用した流量計測装置。(2) In the above (1), each of the upstream pressure holes and the downstream pressure holes includes a plurality of pressure holes, and the pressure holes are equally divided at a predetermined angle toward the center of the support pipe. A flow rate measuring device utilizing duct reinforcement characterized by being arranged and drilled and connected to the same number of upstream and downstream pressure discharge pipes.
【0011】本発明はこのような手段により、その
(1)の手段においては、発電用ボイラーの排煙ダクト
等の補強用の支持パイプをリバース型ピトー管と併用し
ているので、計測点での支持パイプの影響が軽減され
る。即ち、従来の計測は、リバース型ピトー管を排煙ダ
クトに挿入し、前・後支持パイプの中間をトラバースし
て計測していたが、本発明では、計測点が従来より後方
となるため、計測点前流側のパイプの影響が軽減され
る。そのため、充分に整流された流れを計測し、計測誤
差をなくし、正確な流量の計測ができる。又、支持パイ
プの任意の箇所に圧力孔を設けることができ、それらの
圧力を平均化することで、一度に一断面の計測ができて
計測時間の短縮及び精度向上となる。According to the present invention, in the means (1), a support pipe for reinforcing a smoke exhaust duct or the like of a power generation boiler is used in combination with a reverse type pitot tube. The effect of the supporting pipe is reduced. That is, in the conventional measurement, the reverse type pitot tube was inserted into the smoke exhaust duct, and the measurement was performed by traversing the middle of the front and rear support pipes. The effect of the pipe upstream of the measurement point is reduced. Therefore, a sufficiently rectified flow is measured, a measurement error is eliminated, and an accurate flow rate can be measured. In addition, pressure holes can be provided at any positions of the support pipe, and by averaging those pressures, one section can be measured at a time, thereby reducing measurement time and improving accuracy.
【0012】(2)の手段においては、1つの計測位置
で一定の角度で配置した複数の圧力孔が設けられている
ので、設置当初に夫々の角度位置での前流側と後流側の
圧力計測を行い、計測した中で最大を示した圧力孔をそ
の位置での流量計測用として使用することができるので
より高精度の流量計測が可能となる。In the means (2), since a plurality of pressure holes arranged at a fixed angle at one measurement position are provided, at the beginning of the installation, the upstream and downstream sides at each angular position are provided. Since pressure measurement is performed and the pressure hole showing the maximum value among the measured values can be used for measuring the flow rate at that position, more accurate flow rate measurement is possible.
【0013】[0013]
【発明の実施の形態】以下、本発明の実施の形態につい
て、図面に基づいて具体的に説明する。図1は本発明の
実施の一形態に係るダクト補強を利用した流量計測装置
を適用した発電用ボイラーの排煙ダクトの概略構成図、
図2はそのA−A矢視図であり、流れ方向3から見た排
煙ダクト内の支持パイプ2の概略を示し、図3はB−B
矢視図で、後流から見た排煙ダクト内の支持パイプ2の
概略図である。図4は支持パイプ2の詳細を示し、
(a)は側面図、(b)はそのC−C断面図である。Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a smoke exhaust duct of a boiler for power generation to which a flow rate measuring device using duct reinforcement according to an embodiment of the present invention is applied,
FIG. 2 is a view taken in the direction of arrows AA, and schematically shows the support pipe 2 in the smoke exhaust duct viewed from the flow direction 3, and FIG.
FIG. 4 is a schematic view of the support pipe 2 in the smoke exhaust duct as viewed from the downstream side in the arrow view. FIG. 4 shows the details of the support pipe 2,
(A) is a side view, (b) is the CC sectional view.
【0014】図1において、1は排煙ダクト直管部、2
はその補強用の支持パイプ、3は流れ方向である。14
は圧力の測定値を入力し、差圧を検出するデジタルマノ
メータ、15はA/D変換器、16は演算処理器、17
は指示計である。In FIG. 1, reference numeral 1 denotes a smoke exhaust duct straight pipe portion;
Is a support pipe for reinforcement, and 3 is a flow direction. 14
Is a digital manometer that inputs a measured value of pressure and detects a differential pressure, 15 is an A / D converter, 16 is an arithmetic processor, 17
Is an indicator.
【0015】支持パイプ2は図2、図3にも示すよう
に、排煙ダクト直管部1の4隅及び中央部の縦横にそれ
ぞれ設けられ、ダクトを補強するもので、図1に示すよ
うに流れ方向3に複数列配置されており、図2に示すよ
うに、支持パイプ2には4A〜12Aの12点の流れ方
向の計測位置があり、図3に示すように、その反対側に
も4B〜12Bの12点の流れと対向する側の計測位置
が設けられている。As shown in FIGS. 2 and 3, the support pipes 2 are provided at the four corners and at the center and at the center of the smoke exhaust duct straight pipe section 1 to reinforce the duct, as shown in FIG. 2, the support pipe 2 has 12 measurement positions in the flow direction of 4A to 12A as shown in FIG. 2, and as shown in FIG. Also, the measurement positions on the side facing the 12 flows of 4B to 12B are provided.
【0016】図4において排煙ダクト直管部1に補強材
として使用されている支持パイプ2は内部に数本の圧力
取出管13を内蔵している。各々の圧力取出管13の先
端は、流れ方向3に対して前流側にあるA側と後流側に
あるB側に穿設された圧力孔4A1,4A2,4A3,
4A4,4A5および4B1,4B2,4B3,4B
4,4B5に接続されている。In FIG. 4, the support pipe 2 used as a reinforcing material in the straight pipe portion 1 of the smoke exhaust duct has several pressure extraction pipes 13 built therein. The distal end of each pressure extraction pipe 13 has a pressure hole 4A1, 4A2, 4A3 formed on the A side on the upstream side and the B side on the downstream side with respect to the flow direction 3.
4A4, 4A5 and 4B1, 4B2, 4B3, 4B
4, 4B5.
【0017】A側およびB側の圧力孔は、(b)に示す
ように夫々支持パイプ2中心に向って、円周上に10°
間隔で、0°を基準に+10°,+20°,−10°,
−20°、合計5ヶ所穿設されている。ダクト断面内で
の圧力計測位置はA側は図2に示す4A〜12A迄の1
2点、B側は図3に示す4B〜12B迄の12点での各
計測位置において、0°を基準に−20°〜+20°迄
10°毎に5ヶ所圧力孔がダクトに穿設され、圧力取出
管13に接続されている。The pressure holes on the A side and the B side respectively extend 10 ° on the circumference toward the center of the support pipe 2 as shown in FIG.
At intervals, + 10 °, + 20 °, -10 °, 0 °
A total of 5 holes are drilled at -20 °. The pressure measurement position within the cross section of the duct is as follows.
At two measurement points on the B side and 12 measurement points from 4B to 12B shown in FIG. 3, five pressure holes are formed in the duct every 10 ° from -20 ° to + 20 ° with reference to 0 °. , Are connected to a pressure extraction pipe 13.
【0018】このように各計測位置に設けられた圧力取
出管13により夫々の角度に応じたA側とB側の圧力差
を見掛動圧として計測し、設置当初に角度が異なる5方
向の圧力差を計測した中で、最大を示した計測孔を流量
計測用として使用する。As described above, the pressure difference between the A side and the B side corresponding to each angle is measured as apparent dynamic pressure by the pressure extraction pipes 13 provided at the respective measurement positions, and the pressure difference is initially measured in five directions at different angles. Among the pressure differences measured, the measurement hole showing the maximum is used for flow rate measurement.
【0019】図5,図6は計測値の一例で、横軸(θde
g )はリバース型ピトー管の円周廻りの角度(又はヨ−
角)で、本図では±20°迄の範囲であり、縦軸(pd’
/pd)は標準ピトー管とリバース型の動圧比(又はピトー
管係数)を示している。FIGS. 5 and 6 show examples of the measured values, and the horizontal axis (θde
g) is the angle (or yaw) around the circumference of the reverse pitot tube.
In this figure, the range is up to ± 20 °, and the vertical axis (pd '
/ pd) indicates the dynamic pressure ratio (or Pitot tube coefficient) between the standard pitot tube and the reverse type.
【0020】図5における最大点(本図では+10°)
の位置を今後の流量計測孔として使用することになり、
又、図6に示すように、最大点から±5°の位置でも動
圧比の差はほとんど認められず、誤差として無視出来る
ことがわかる。Maximum point in FIG. 5 (+ 10 ° in this figure)
Will be used as a flow rate measurement hole in the future,
Further, as shown in FIG. 6, even at a position ± 5 ° from the maximum point, a difference in the dynamic pressure ratio is hardly recognized, and it can be seen that the difference can be ignored as an error.
【0021】上記のように各計測位置において、流量計
測孔が決定され、その位置でA側(前流側)、B側(後
流側)の圧力が測定されるが、測定値はA側の圧力PT
については計測位置4A〜12A迄の12点の平均圧力
を取出し、同様にB側の圧力PS についても、計測位置
4B〜12B迄の12点の平均圧力として取出し夫々、
図1に示す演算システム20のデジタルマノメータ14
で圧力差を検出し、A/D変換器15を介して演算処理
器16で流量に演算して指示計17で流量として表示す
ることが出来る。As described above, the flow rate measurement holes are determined at the respective measurement positions, and the pressures on the A side (the upstream side) and the B side (the downstream side) are measured at the positions. Pressure P T
Taken out an average pressure of 12 points up measurement position 4A~12A for similarly for even pressure P S of the B side is taken out as each of the average pressure of 12 points up measurement position 4B~12B,
Digital manometer 14 of arithmetic system 20 shown in FIG.
To detect the pressure difference, calculate the flow rate by the arithmetic processing unit 16 via the A / D converter 15, and display it as the flow rate on the indicator 17.
【0022】以上、説明の実施の形態によれば、発電用
ボイラーの排煙ダクト直管部1の補強用の支持パイプ2
に圧力孔4A1〜4A5及び4B1〜4B5を穿孔し、
圧力取出管13を設けて支持パイプ2とリバース型ピト
ー管とを併用することで、従来のように前・後支持パイ
プの中間をトラバースする方法よりは計測点が後方とな
るため、計測点前流側のパイプの影響が軽減される。According to the embodiment described above, the supporting pipe 2 for reinforcing the straight pipe portion 1 of the smoke exhaust duct of the boiler for power generation is described.
Drill the pressure holes 4A1 to 4A5 and 4B1 to 4B5
By providing the pressure extraction pipe 13 and using the support pipe 2 and the reverse type pitot pipe together, the measurement point is located rearward as compared with the conventional method of traversing the middle between the front and rear support pipes. The effect of the downstream pipe is reduced.
【0023】又、支持パイプ2の任意の箇所に圧力孔を
設け、それらの圧力を平均化することで、一度に一つの
断面の計測ができ、計測時間の短縮及び精度向上とな
る。Further, by providing pressure holes at arbitrary positions of the support pipe 2 and averaging the pressures, it is possible to measure one section at a time, thereby reducing measurement time and improving accuracy.
【0024】[0024]
【発明の効果】以上、具体的に説明したように、本発明
は、発電用ボイラーの排煙ダクトの支持パイプにリバー
ス型ピトー管を併用するようにし、更に、支持パイプに
は複数の圧力孔を所定の角度で等分に配置し、それぞれ
複数本の圧力取出管と接続する構成も提供するので、次
のような効果を奏する。As described above, according to the present invention, a reverse type pitot tube is used in combination with a support pipe for a smoke exhaust duct of a power generation boiler, and a plurality of pressure holes are provided in the support pipe. Are equally arranged at a predetermined angle and connected to a plurality of pressure extraction pipes, respectively, so that the following effects can be obtained.
【0025】(1)支持パイプをリバース型ピトー管と
して併用することで従来型より計測点が後方に位置する
ことになり、前流側のパイプの影響が低減されて十分整
流された流れを計測し計測誤差を無くすことができる。(1) By using the supporting pipe as a reverse type pitot tube, the measuring point is located behind the conventional type, and the effect of the pipe on the upstream side is reduced, and a sufficiently rectified flow is measured. Measurement error can be eliminated.
【0026】(2)又、支持パイプの任意の箇所に圧力
孔を設けることができるので、一度に一断面全域の流速
計測ができ大幅な時間誤差が可能となる。(2) In addition, since a pressure hole can be provided at an arbitrary position of the support pipe, the flow velocity can be measured over the entire cross section at a time, and a large time error can be obtained.
【0027】(3)又、支持パイプには複数の圧力孔と
圧力取出管を設け、その中で計測値が最大を示す圧力孔
を計測用として用いることができるので、流れ方向が異
なった場合でも、精度が良い計測ができる。(3) The support pipe is provided with a plurality of pressure holes and a pressure extraction pipe, and the pressure hole having the maximum measured value can be used for measurement. However, accurate measurements can be made.
【0028】(4)更に、年に1回程度の流量確認では
なく常置型に付き、常時流量の確認ができ、信頼性向上
にもなる。(4) Further, the flow rate can be checked at all times, and the flow rate can be checked at all times, and the reliability can be improved.
【図1】本発明の実施の一形態に係るダクト補強を利用
した流量計測装置を適用した構成図で、発電用ボイラー
の排煙ダクトと計測システムを示す。FIG. 1 is a configuration diagram to which a flow rate measuring device utilizing duct reinforcement according to an embodiment of the present invention is applied, showing a smoke exhaust duct of a boiler for power generation and a measuring system.
【図2】図1におけるA−A矢視図である。FIG. 2 is a view taken in the direction of arrows AA in FIG.
【図3】図1におけるB−B矢視図である。FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;
【図4】本発明の実施の一形態に係る流量計測装置にお
ける支持パイプ、圧力取出管及び圧力孔を示す図で、
(a)は支持パイプの側面図、(b)はそのC−C断面
図である。FIG. 4 is a view showing a support pipe, a pressure extraction pipe, and a pressure hole in the flow rate measurement device according to the embodiment of the present invention;
(A) is a side view of a support pipe, (b) is CC sectional drawing.
【図5】リバース型ピトー管のピトー管係数とヨ−角の
関係を示す図で、最大点10°場合を示す。FIG. 5 is a diagram showing a relationship between a pitot tube coefficient and a yaw angle of a reverse type pitot tube, showing a case where a maximum point is 10 °.
【図6】リバース型ピトー管のピトー管係数とヨ−角の
関係を示す図で、最大点と誤差範囲を示す。FIG. 6 is a diagram showing a relationship between a pitot tube coefficient and a yaw angle of a reverse type pitot tube, showing a maximum point and an error range.
【図7】従来の発電用ボイラーの排煙ダクトと計測孔を
示す概略配置図である。FIG. 7 is a schematic layout diagram showing a smoke exhaust duct and a measurement hole of a conventional power generation boiler.
【図8】図7におけるD−D断面図である。8 is a sectional view taken along the line DD in FIG. 7;
【図9】従来のリバース型ピトー管を示し、(a)は側
面図、(b)はそのE−E断面図である。9A and 9B show a conventional reverse-type pitot tube, FIG. 9A is a side view, and FIG.
1 排煙ダクト直管部 2 支持パイプ 3 流れ方向 4A1〜4A5 圧力孔 4B1〜4B5 圧力孔 4A〜12A A側(前流側)計測位置 4B〜12B B側(後流側)計測位置 13 圧力取出管 14 デジタルマノメータ 15 A/D変換器 16 演算処理器 17 指示器 20 演算システム DESCRIPTION OF SYMBOLS 1 Smoke exhaust duct straight pipe part 2 Support pipe 3 Flow direction 4A1-4A5 Pressure hole 4B1-4B5 Pressure hole 4A-12A A side (front side) measurement position 4B-12B B side (back side) measurement position 13 Pressure extraction Tube 14 Digital manometer 15 A / D converter 16 Arithmetic processor 17 Indicator 20 Arithmetic system
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−147026(JP,A) 特開 昭50−144466(JP,A) 特開 昭63−246618(JP,A) 実開 昭62−155372(JP,U) (58)調査した分野(Int.Cl.7,DB名) G01F 1/00 - 9/02 G01P 5/16 - 5/165 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-147026 (JP, A) JP-A-50-144466 (JP, A) JP-A-63-246618 (JP, A) 155372 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) G01F 1/00-9/02 G01P 5/16-5/165
Claims (2)
ース型ピトー管を用いて同排煙ダクト内の圧力を測定
し、同圧力より流量を求める流量計測装置であって、前
記リバース型ピトー管は、前記排煙ダクト内の補強用支
持パイプの所定の位置に、ガス流れに向く前流側圧力孔
及びそれと反対向きの後流側圧力孔を穿設すると共に、
同支持パイプ内に前記両圧力孔とそれぞれ接続する前流
側圧力取出管及び後流側圧力取出管を設けて同支持パイ
プと併用したことを特徴とするダクト補強を利用した流
量計測装置。1. A flow measuring device for measuring a pressure in a smoke exhaust duct of a power generation boiler using a reverse type pitot tube in the smoke exhaust duct and obtaining a flow rate from the pressure, wherein the reverse type pitot is provided. The pipe is provided with a upstream pressure hole facing the gas flow and a downstream pressure hole facing the gas flow hole at a predetermined position of the reinforcing support pipe in the smoke exhaust duct,
A flow measurement device using duct reinforcement, wherein a pre-stream pressure outlet pipe and a downstream pressure outlet pipe connected to the pressure holes are provided in the support pipe and used together with the support pipe.
それぞれ複数個からなり、前記支持パイプの中心に向っ
て所定の角度で等分となるように配置して穿設され、同
数からなる前流側圧力取出管及び後流側圧力取出管にそ
れぞれ接続されていることを特徴とする請求項1記載の
ダクト補強を利用した流量計測装置。2. The upstream pressure hole and the downstream pressure hole,
It is composed of a plurality of pipes, each of which is disposed so as to be equally divided at a predetermined angle toward the center of the support pipe, and is connected to the same number of upstream and downstream pressure discharge pipes. The flow rate measuring device utilizing duct reinforcement according to claim 1, wherein the flow rate measuring device is used.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03047096A JP3322550B2 (en) | 1996-02-19 | 1996-02-19 | Flow measurement device using duct reinforcement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03047096A JP3322550B2 (en) | 1996-02-19 | 1996-02-19 | Flow measurement device using duct reinforcement |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09222346A JPH09222346A (en) | 1997-08-26 |
JP3322550B2 true JP3322550B2 (en) | 2002-09-09 |
Family
ID=12304765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP03047096A Expired - Fee Related JP3322550B2 (en) | 1996-02-19 | 1996-02-19 | Flow measurement device using duct reinforcement |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3322550B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1333237C (en) * | 2004-08-20 | 2007-08-22 | 温汉璋 | Uniform speed flow sensor having flow signal amplifying function |
JP5921361B2 (en) * | 2012-06-25 | 2016-05-24 | 株式会社日立製作所 | Air volume measuring device for air conditioning system |
CN102854338B (en) * | 2012-08-31 | 2014-04-02 | 黑龙江省电力科学研究院 | Method for selecting smoke gas average flow rate measure point of desulfurized flue gas online monitoring system of coal-fired power plant |
CN104459197B (en) * | 2014-12-15 | 2018-08-24 | 中煤科工集团重庆研究院有限公司 | Method and system for reducing lower limit of field pipeline gas flow velocity measurement |
CN106197566B (en) * | 2016-06-29 | 2019-07-26 | 山东大学 | A kind of coal-burning power plant's complexity flue gas flow monitoring method and system |
-
1996
- 1996-02-19 JP JP03047096A patent/JP3322550B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH09222346A (en) | 1997-08-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3234894B2 (en) | Method and apparatus for measuring unsteady flow velocity | |
US4961344A (en) | Multiple tube flowmeter | |
JP3282773B2 (en) | Thermal flow meter | |
JP3322550B2 (en) | Flow measurement device using duct reinforcement | |
EP0137623B1 (en) | A flowmeter | |
JP3119782B2 (en) | Flowmeter | |
CN112945326A (en) | Gas flow measuring device and method | |
JP2869054B1 (en) | Insertion type vortex flowmeter and method for determining its probe line length | |
JP3144986B2 (en) | Flowmeter | |
JPH11211525A (en) | Flowmeter utilizing flow sensor | |
JP4015751B2 (en) | Differential pressure type flow meter | |
JPH11118547A (en) | Air capacity measuring apparatus | |
KR100500532B1 (en) | Pitot cone assembly for flow measurement | |
JP3375939B2 (en) | Pitot tube flow meter | |
JP3383572B2 (en) | Flowmeter | |
JP2000002567A (en) | Composite type mass flow meter | |
JP3192912B2 (en) | Flowmeter | |
JP3398251B2 (en) | Flowmeter | |
JPS6338087B2 (en) | ||
JP3252187B2 (en) | Flowmeter | |
JPH03108613A (en) | Measuring method of average flow velocity within conduit | |
JPH07892Y2 (en) | Turbine flow measurement device | |
JPH08145743A (en) | Turbine flowmeter | |
JPH01272922A (en) | Vortex flowmeter | |
JP3565374B2 (en) | Current meter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020528 |
|
LAPS | Cancellation because of no payment of annual fees |