JPH09222346A - Flow rate measuring device utilizing duct reinforcement - Google Patents
Flow rate measuring device utilizing duct reinforcementInfo
- Publication number
- JPH09222346A JPH09222346A JP3047096A JP3047096A JPH09222346A JP H09222346 A JPH09222346 A JP H09222346A JP 3047096 A JP3047096 A JP 3047096A JP 3047096 A JP3047096 A JP 3047096A JP H09222346 A JPH09222346 A JP H09222346A
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- Prior art keywords
- flow rate
- pressure
- pipe
- flow
- support pipe
- 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.)
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Abstract
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 device using duct reinforcement for measuring the flow rate of a smoke exhaust duct of a power generation boiler.
【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 the gas flow rate of a straight pipe part such as a smoke exhaust duct of a power generation boiler, a velocity meter such as a reverse type pitot tube is externally inserted into the smoke exhaust duct to measure the flow velocity while traversing. There is a way to do. As an example, FIG.
FIG. 8 shows a schematic view of the 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 cross section in FIG. 7.
【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, in the smoke exhaust duct straight pipe portion 01 of the power generation boiler, support pipes 02 for reinforcing the duct are arranged in a plurality of rows in the gas flow direction 03. Reference numeral 04 in the drawing denotes a flow velocity measuring hole, and the reverse type Pitot tube 06 of FIG. 9 is inserted from the flow velocity measuring hole 04 to perform measurement while traversing an arbitrary measurement point 05 as shown in FIG. 8 vertically and horizontally. , Calculate 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.
6A and 6B are diagrams showing the principle of No. 6, FIG. 6A is a side view, and FIG. In this figure, a reverse type Pitot tube 06 has a pressure hole 07 facing the flow 03, a pipe for taking out the pressure P T , and a pressure hole 08 for 180 ° opposite direction, and a pipe for taking out the pressure P S. And pressure P from these tubes
Take out 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。Pressure PTAnd pressure PSDifference is about 2 of true dynamic pressure
Since it is double, the pressure PTAnd pressure P SThe difference between
With, the true dynamic pressure is known and the flow velocity is obtained. The pressure
Power P TAnd pressure PSDifference is the apparent dynamic pressure,
Compare with a standard Pitot tube (Prandtl type) with
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 the smoke exhaust duct of the power generation boiler as shown in FIG. 7 is disturbed by the influence of the support pipe 02, and the flow is measured at a position where the flow is not sufficiently rectified. , Which caused measurement error.
【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。Further, as shown in FIG.
There are several locations (three locations in FIG. 8) per cross section, and it took a very long time to perform the velocity measurement while traversing arbitrary measurement points 05 (9 points in FIG. 8) from the respective velocity measurement holes 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 which measures the pressure in a smoke exhaust duct of a power generation boiler by using a reverse type Pitot tube to measure the pressure in the smoke exhaust duct and obtains the flow rate from the pressure.
The reverse type Pitot tube has a front flow side pressure hole facing the gas flow and a back flow side pressure hole opposite thereto at a predetermined position of the reinforcing support pipe in the smoke exhaust duct, and supports the same. A flow measuring device utilizing duct reinforcement, characterized in that a front flow side pressure take-out pipe and a back flow side pressure take-out pipe which are respectively connected to the pressure holes are provided in the pipe and used together with the support 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 front flow side pressure hole and the back flow side pressure hole is composed of a plurality of 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, wherein the flow measuring device is arranged and drilled, and is connected to the front flow side pressure extraction pipe and the back flow side pressure extraction pipe which are equal in number.
【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, since the supporting pipe for reinforcement such as the smoke exhaust duct of the power generation boiler is used together with the reverse type Pitot tube in the means (1), the measuring point is measured. The influence of the support pipe is reduced. That is, in the conventional measurement, the reverse type Pitot tube was inserted into the smoke exhaust duct, and the middle of the front and rear support pipes was traversed for measurement, but in the present invention, since the measurement point is rearward compared to the conventional, The influence of the pipe on the upstream side of the measurement point is reduced. Therefore, it is possible to measure a sufficiently rectified flow, eliminate a measurement error, and accurately measure the flow rate. Further, pressure holes can be provided at arbitrary positions of the support pipe, and by averaging the pressures, one cross section can be measured at one time, and the measurement time can be shortened and the accuracy can be improved.
【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, the front flow side and the back flow side at each angular position at the beginning of installation. Since the pressure measurement is performed and the pressure hole showing the maximum of the measured pressures can be used for measuring the flow rate at that position, the flow rate can be measured with higher accuracy.
【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。BEST MODE FOR CARRYING OUT THE INVENTION 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 power generation boiler 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 along the line AA, showing an outline of the support pipe 2 in the smoke exhaust duct viewed from the flow direction 3, and FIG.
FIG. 3 is a schematic view of the support pipe 2 in the smoke exhaust duct as seen from the wake in an arrow view. FIG. 4 shows the details of the support pipe 2,
(A) is a side view and (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 is a smoke exhaust duct straight pipe portion, 2
Is a supporting pipe for its reinforcement, and 3 is a flow direction. 14
Is a digital manometer for inputting a pressure measurement value and detecting 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 four corners of the straight pipe portion 1 of the smoke exhaust duct and in the vertical and horizontal directions of the central portion thereof to reinforce the duct. Are arranged in a plurality of rows in the flow direction 3, and as shown in FIG. 2, the support pipe 2 has 12 measurement positions in the flow direction of 4A to 12A, and as shown in FIG. Also, measurement positions on the side facing the 12-point flow 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 member in the straight pipe portion 1 of the smoke exhaust duct has several pressure extraction pipes 13 built therein. The tip of each pressure extraction pipe 13 has pressure holes 4A1, 4A2, 4A3 formed on the A side on the front side and the B side on the back 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 are respectively 10 ° on the circumference toward the center of the support pipe 2 as shown in (b).
At intervals, 0 ° as a reference, + 10 °, + 20 °, -10 °,
It is drilled at -20 °, 5 places in total. The pressure measurement position within the duct cross section is 1 from 4A to 12A shown in FIG.
At 2 points and B side, at each of 12 measurement points 4B to 12B shown in FIG. 3, 5 pressure holes are drilled in the duct every 10 ° from -20 ° to + 20 ° based on 0 °. , Is connected to the 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 take-off pipes 13 provided at the respective measurement positions measure the difference in pressure between the A side and the B side according to the respective angles as an apparent dynamic pressure, and at the initial stage of installation, the angles are different in five directions. Among the pressure differences measured, the maximum measurement hole 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。5 and 6 show examples of measured values, in which the horizontal axis (θde
g) is the angle (or yaw) around the circumference of the reverse type pitot tube.
This is the range up to ± 20 ° in this figure, and the vertical axis (pd '
/ pd) shows 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)
Position will be used as a future flow rate measurement hole,
Further, as shown in FIG. 6, there is almost no difference in the dynamic pressure ratio even at the position of ± 5 ° from the maximum point, and it can be seen that it 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 measuring hole is determined at each measuring position, and the pressures on the A side (front side) and the B side (rear side) are measured at that position, but the measured value is on the A side. Pressure P T
For, the average pressure of 12 points from the measuring positions 4A to 12A is taken out, and similarly, for the pressure P S on the B side, the average pressure of 12 points from the measuring positions 4B to 12B is taken out.
Digital manometer 14 of arithmetic system 20 shown in FIG.
It is possible to detect the pressure difference with, calculate the flow rate with the arithmetic processor 16 through the A / D converter 15, and display it as the flow rate with 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 support pipe 2 for reinforcing the straight pipe portion 1 of the smoke exhaust duct of the power generation boiler.
To form pressure holes 4A1 to 4A5 and 4B1 to 4B5,
Since the pressure extraction pipe 13 is provided and the support pipe 2 and the reverse type Pitot pipe are used together, the measurement point becomes rearward as compared with the conventional method of traversing the middle of the front and rear support pipes. The influence of the pipe on the flow side 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 a pressure hole at an arbitrary position of the support pipe 2 and averaging the pressures, one cross section can be measured at a time, and the measurement time can be shortened and the accuracy can be improved.
【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 in detail, according to the present invention, a reverse type pitot tube is used together with a support pipe of a smoke exhaust duct of a power generation boiler, and a plurality of pressure holes are provided in the support pipe. Is also provided at equal angles and is 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) Since the support pipe is also used as a reverse type Pitot tube, the measuring point is located rearward compared to the conventional type, and the influence of the pipe on the upstream side is reduced to measure a sufficiently rectified flow. Therefore, 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) Further, since the pressure hole can be provided at an arbitrary position of the support pipe, the flow velocity over the entire cross section can be measured at one time, and a large time error is possible.
【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) Further, the support pipe is provided with a plurality of pressure holes and pressure take-out pipes, and the pressure hole having the maximum measured value can be used for measurement, so that when the flow direction is different. However, accurate measurement can be performed.
【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) Furthermore, instead of confirming the flow rate about once a year, it is possible to check the flow rate at all times by attaching it to a stationary type, which also improves reliability.
【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 using duct reinforcement according to an embodiment of the present invention is applied, showing a smoke exhaust duct of a power generation boiler and a measurement 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 diagram showing a support pipe, a pressure extraction pipe, and a pressure hole in the flow rate measuring device according to the embodiment of the present invention.
(A) is a side view of a support pipe, (b) is the CC sectional view.
【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 of a maximum point of 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, in which FIG. 9A is a side view and FIG. 9B is a sectional view taken along line EE thereof.
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 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
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 rate measuring device for measuring a pressure in a smoke exhaust duct of a power generation boiler by using a reverse type Pitot tube in the smoke exhaust duct to obtain a flow rate from the pressure, the reverse type Pitot tube. The pipe has a front flow side pressure hole facing the gas flow and a back flow side pressure hole opposite thereto at a predetermined position of the reinforcing support pipe in the smoke exhaust duct, and
A flow rate measuring device utilizing duct reinforcement, characterized in that a front flow side pressure extraction pipe and a back flow side pressure extraction pipe, which are respectively connected to the pressure holes, are provided in the support pipe and are 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 front flow side pressure hole and the back flow side pressure hole,
A plurality of pipes, each of which is arranged at a predetermined angle and equally divided toward the center of the support pipe, and is connected to the front flow side pressure extraction pipe and the back flow side pressure extraction pipe of the same number. The flow rate measuring device using the duct reinforcement according to claim 1.
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 true JPH09222346A (en) | 1997-08-26 |
| JP3322550B2 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) |
Cited By (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 |
| CN102854338A (en) * | 2012-08-31 | 2013-01-02 | 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 |
| JP2014005996A (en) * | 2012-06-25 | 2014-01-16 | Hitachi Ltd | Air flow measuring device for air conditioning system |
| CN104459197A (en) * | 2014-12-15 | 2015-03-25 | 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 |
| CN106197566A (en) * | 2016-06-29 | 2016-12-07 | 山东能工低碳科技有限公司 | 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
Cited By (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 |
| JP2014005996A (en) * | 2012-06-25 | 2014-01-16 | Hitachi Ltd | Air flow measuring device for air conditioning system |
| CN102854338A (en) * | 2012-08-31 | 2013-01-02 | 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 |
| CN104459197A (en) * | 2014-12-15 | 2015-03-25 | 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 |
| CN106197566A (en) * | 2016-06-29 | 2016-12-07 | 山东能工低碳科技有限公司 | A kind of coal-burning power plant's complexity flue gas flow monitoring method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3322550B2 (en) | 2002-09-09 |
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