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JP4048199B2 - Average bidirectional flow tube - Google Patents
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JP4048199B2 - Average bidirectional flow tube - Google Patents

Average bidirectional flow tube Download PDF

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JP4048199B2
JP4048199B2 JP2004369585A JP2004369585A JP4048199B2 JP 4048199 B2 JP4048199 B2 JP 4048199B2 JP 2004369585 A JP2004369585 A JP 2004369585A JP 2004369585 A JP2004369585 A JP 2004369585A JP 4048199 B2 JP4048199 B2 JP 4048199B2
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tube
average
pipe
bidirectional flow
pressure
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JP2005300520A (en
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炳祚 尹
慶鎬 姜
東鎭 漁
源弼 白
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韓國原子力研究所
韓國水力原子力株式會▲社▼
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K97/00—Accessories for angling
    • A01K97/10—Supports for rods
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S269/00—Work holders
    • Y10S269/907—Work holder for fishing flies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S81/00—Tools
    • Y10S81/01—Tool-support adjuncts

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  • Environmental Sciences (AREA)
  • Measuring Volume Flow (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)

Description

本発明は流体システムにおいて流体の流量を計測する流量計に関するものであって、より詳しくは、垂直配管内で単相及び二相流動が発生する場合ばかりでなく、水平配管内で成層流流動が発生する場合にも二相流動流体の質量流量を測定することができる流量計に関するものである。   The present invention relates to a flow meter for measuring the flow rate of a fluid in a fluid system, and more particularly, not only when single-phase and two-phase flow occurs in a vertical pipe, but also stratified flow in a horizontal pipe. The present invention relates to a flow meter that can measure the mass flow rate of a two-phase fluid even when it occurs.

図１は従来技術によるピトーチューブ(Pitot tube)10が設けられた配管1の側面断面であって、ピトーチューブ10は二重管(図示せず)からなる。図１に示されたとおり、従来技術によるピトーチューブ10では二重管それぞれに総圧孔11と静圧孔13が形成されている。この総圧孔11が流体の流れに対向するようにピトーチューブ10が設けられている。   FIG. 1 is a side sectional view of a pipe 1 provided with a pitot tube 10 according to the prior art. The pitot tube 10 is a double pipe (not shown). As shown in FIG. 1, the Pitot tube 10 according to the prior art has a total pressure hole 11 and a static pressure hole 13 formed in each double tube. The Pitot tube 10 is provided so that the total pressure hole 11 faces the fluid flow.

総圧孔11に作用する総圧(Stagnation Pressure)はパイプ内を流れる流体の流れによる動圧(Dynamic Pressure)と静圧(Static Pressure)の和であり、静圧孔13には静圧だけが作用する。従って、総圧孔11と静圧孔13が形成された管から延長される圧力計連結管15に連結された圧力計(図示せず)によって図１に示されたとおり、総圧孔11に作用する圧力と静圧孔13に作用する圧力差(△P)を測定し、測定された圧力差によって流体速度を算出することができる。   The total pressure (Stagnation Pressure) acting on the total pressure hole 11 is the sum of the dynamic pressure due to the flow of fluid flowing in the pipe and the static pressure, and only the static pressure is present in the static pressure hole 13. Works. Accordingly, as shown in FIG. 1 by a pressure gauge (not shown) connected to a pressure gauge connecting pipe 15 extending from the pipe in which the total pressure holes 11 and the static pressure holes 13 are formed, The pressure difference (ΔP) acting on the pressure acting on the static pressure hole 13 is measured, and the fluid velocity can be calculated from the measured pressure difference.

上記ピトーチューブ10によって測定される流体速度はピトーチューブ10が位置した点からの速度であり、配管1全体を流れる平均速度ではないので、配管1内で平均速度を得るためには、ピトーチューブ10の挿入深度を変更しながら多くの所における速度を多数回測定して、それを平均しなければならない。   The fluid velocity measured by the Pitot tube 10 is the velocity from the point where the Pitot tube 10 is located, and is not the average velocity that flows through the entire piping 1. Therefore, in order to obtain the average velocity in the piping 1, the Pitot tube 10 The speed at many places must be measured a number of times while changing the insertion depth, and averaged.

図２は従来技術による平均ピトーチューブ20を示した側面断面図であり、図３は従来技術による平均ピトーチューブ20の正面断面図であって、平均ピトーチューブ20も二重管(図示せず)から構成されている。同一構成に対しては図１と同じ図面符号を使用する。   2 is a side sectional view showing an average pitot tube 20 according to the prior art, and FIG. 3 is a front sectional view of the average pitot tube 20 according to the prior art, and the average pitot tube 20 is also a double tube (not shown). It is composed of The same reference numerals as those in FIG. 1 are used for the same components.

図２及び図３に示したとおり、従来技術による平均ピトーチューブ20では二重管それぞれに多数個の総圧孔21と多数個の静圧孔23が形成されており、二重管はそれぞれ圧力計(図示せず)に連結される圧力計連結管25に延設される。配管1内に流れる流体速度測定原理はピトーチューブ10の流体速度測定原理と同一である。   As shown in FIG. 2 and FIG. 3, in the average pitot tube 20 according to the prior art, a large number of total pressure holes 21 and a large number of static pressure holes 23 are formed in each double pipe. A pressure gauge connecting pipe 25 is connected to a gauge (not shown). The principle of measuring the velocity of the fluid flowing in the pipe 1 is the same as the principle of measuring the velocity of the fluid of the Pitot tube 10.

平均ピトーチューブ20は、ピトーチューブ10を使用して繰り返して測定する作業手続きが面倒であり多くの時間が所要されるので、このような作業を簡素化するためのものである。すなわち、二重管の多数個の総圧孔21の形成位置でそれぞれ総圧を測定し、多数個の静圧孔23の形成位置でそれぞれ静圧を測定して配管1内の多数の位置でそれぞれ総圧及び静圧を測定して平均流速を算出することができる。   The average pitot tube 20 is intended to simplify such work because the work procedure for repeated measurement using the pitot tube 10 is troublesome and requires a lot of time. That is, the total pressure is measured at the positions where the multiple total pressure holes 21 of the double pipe are formed, and the static pressure is measured at the positions where the multiple static pressure holes 23 are formed. The average flow velocity can be calculated by measuring the total pressure and static pressure, respectively.

図４及び図５は局所両方向流動チューブ30を示したもので、図４及び図５に示したとおり、局所両方向流動チューブ30は円筒形チューブ31と、隔板33及び圧力計連結管35から構成されている。図４及び図５では同一構成に対して図１及び図２と同一な図面符号で表記する。   4 and 5 show a local bidirectional flow tube 30. As shown in FIGS. 4 and 5, the local bidirectional flow tube 30 is composed of a cylindrical tube 31, a diaphragm 33 and a pressure gauge connecting pipe 35. Has been. 4 and 5, the same components are denoted by the same reference numerals as those in FIGS. 1 and 2.

局所両方向流動チューブ30の流体速度測定原理は図１に示されたピトーチューブ10及び図２に示された平均ピトーチューブ20と類似し、前方流れ(Forward Flow)流体に対して図４に示されたとおり、局所両方向流動チューブ30が設けられる場合、'Ａ'部にはパイプ内を流れる流体流れによる動圧と静圧の和である総圧が作用し、'Ｂ'部には該'Ｂ'部に生じる速度による吸入効果によって静圧より多少低い圧力である背圧(Back Pressure)が作用する。上記'Ａ'部及び'Ｂ'部に作用する圧力は圧力計連結管35を通じて圧力計へ伝達され、'Ａ'部と'Ｂ'部の差圧を計測して任意の流動条件で流体の平均速度を算出する。   The fluid velocity measurement principle of the local bidirectional flow tube 30 is similar to the pitot tube 10 shown in FIG. 1 and the average pitot tube 20 shown in FIG. 2, and is shown in FIG. 4 for a forward flow fluid. As described above, when the local bidirectional flow tube 30 is provided, the total pressure that is the sum of the dynamic pressure and the static pressure due to the fluid flow flowing in the pipe acts on the 'A' portion, and the 'B' portion has the 'B' 'Back pressure, which is slightly lower than static pressure, acts due to the inhalation effect due to the speed generated in the part. The pressure acting on the parts 'A' and 'B' is transmitted to the pressure gauge through the pressure gauge connecting pipe 35, and the pressure difference between the parts 'A' and 'B' is measured to allow the fluid to flow under an arbitrary flow condition. Calculate the average speed.

しかし、上記のような平均ピトーチューブ20を使用する場合には配管1内に二相流動が発生する場合、例えば、配管1下部分には液体が流れ、上部分には気体が流れる場合に総圧孔21等の間に圧力差異が発生して平均ピトーチューブ20の圧力配管に満たされている水が流路へ抜けて出る恐れがあり、また配管内で急激な減圧が生ずる場合に、圧力計連結管25に作用する圧力に急激な減圧が生じ、圧力計連結管25に相変化が発生し得るので、これを防止するために別途の冷却装置が必要な問題点がある。また上記のような局所両方向流動チューブ30を使用する場合には、配管1内平均流体速度を測定するのに限界があり、配管1内に二相流動が交互に発生するとか配管1内の急激な減圧によって流体が相変化を受ける場合、そして水平配管から二相流流動発生によって成層流流動が発生する場合、平均流量を測定するために局所両方向流動チューブ30を移送させて計測しなければならないという問題点がある。   However, when the average pitot tube 20 as described above is used, when two-phase flow occurs in the pipe 1, for example, when the liquid flows in the lower part of the pipe 1 and the gas flows in the upper part, the total If there is a pressure difference between the pressure holes 21 etc., there is a risk that the water filled in the pressure piping of the average pitot tube 20 may flow out into the flow path, and if sudden pressure reduction occurs in the piping, The pressure acting on the gauge connecting pipe 25 is suddenly reduced, and a phase change can occur in the pressure gauge connecting pipe 25. Therefore, there is a problem that a separate cooling device is required to prevent this. In addition, when using the above-mentioned local bidirectional flow tube 30, there is a limit in measuring the average fluid velocity in the pipe 1, and two-phase flow is alternately generated in the pipe 1, or the pipe 1 If the fluid undergoes a phase change due to slow pressure reduction, and if stratified flow occurs due to two-phase flow generation from a horizontal pipe, the local bidirectional flow tube 30 must be transferred to measure the average flow rate. There is a problem.

本発明は上記のような問題点を解決するためのものであって、パイプ内単相流動及び二相流動等多様な流動条件において流体の平均速度を測定することができ、特に背圧の減少効果を利用した低速流動の計測性を向上させ、パイプ内に成層流流動が発生する場合にも、別途の冷却装置なしに流体の速度を測定することができる流量計を提供しようとすることに本発明の目的がある。   The present invention is intended to solve the above-described problems, and can measure the average velocity of fluid under various flow conditions such as single-phase flow and two-phase flow in a pipe, and particularly reduce the back pressure. To improve the measurable performance of low-speed flow using the effect, and to provide a flow meter that can measure the velocity of the fluid without a separate cooling device even when stratified flow occurs in the pipe There is an object of the present invention.

本発明は上記のような目的を達成するために考案されたものであって、チューブとチューブ内に設けられる隔板と、隔板前後に上記チューブの上板または下板に設けられる圧力計連結管を備える平均両方向流動チューブを提供する。 The present invention has been devised to achieve the above-described object, and includes a tube, a partition plate provided in the tube, and a pressure gauge connection provided on the upper plate or the lower plate of the tube before and after the partition plate. An average bidirectional flow tube with a tube is provided.

流量測定時、本発明に基づく平均両方向流動チューブを使用する場合にはパイプ内に二相流動等、多様な流動が発生する場合にもパイプ内流体の平均速度を測定することができ、圧力計連結管に沸騰発生を防止する冷却装置を必要としなくなる。   When using the average bidirectional flow tube according to the present invention when measuring the flow rate, the average velocity of the fluid in the pipe can be measured even when various flows such as two-phase flow occur in the pipe. The connecting pipe does not need a cooling device for preventing the occurrence of boiling.

以下、図面を参照して本発明に基づく望ましい実施形態を詳しく説明する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

図６は本発明に基づく平均両方向流動チューブ[AVERAGE BIDIRECTIONAL FLOW TUBE]100を示したものであり、図７は本発明に基づく平均両方向流動チューブ100が設けられた配管1の側面断面図であり、図８は図７の'Ｂ−Ｂ'線断面を示したものであり、図９は図６の'Ｃ−Ｃ'線断面を示したものである。同一な構成に対しては、図１及び図２と同一な図面符号で表記する。   FIG. 6 shows an average bidirectional flow tube [AVERAGE BIDIRECTIONAL FLOW TUBE] 100 according to the present invention, and FIG. 7 is a side sectional view of the pipe 1 provided with the average bidirectional flow tube 100 according to the present invention. 8 shows a cross section taken along the line 'BB' of FIG. 7, and FIG. 9 shows a cross section taken along the line 'CC' of FIG. The same components are denoted by the same reference numerals as those in FIGS.

図６に示されたように、本発明に基づく平均両方向流動チューブ100は二つの側板と上板及び下板からなるチューブ101（ここでは略長方形のチューブ状）と、上記チューブ101をなす側板に垂直に設けられてチューブの前後端を隔離する隔板103と、上記隔板103前後に設けられる二つの圧力計連結管105、105(b)を含んで構成される（なお、図６では上側の圧力計連結管105(b)を省略してある）。図７及び図８に示されたように、上記チューブ101をなす上板及び下板は上記平均両方向流動チューブ100が設けられる上記配管1内面と接するように曲率を有している。 As shown in FIG. 6, the average bidirectional flow tube 100 according to the present invention includes a tube 101 (here, a substantially rectangular tube shape) composed of two side plates, an upper plate and a lower plate, and a side plate forming the tube 101. A partition plate 103 that is provided vertically and separates the front and rear ends of the tube, and two pressure gauge connecting pipes 105 and 105 (b) provided before and after the partition plate 103 are configured (in FIG. 6, the upper side) The pressure gauge connecting pipe 105 (b) is omitted). As shown in FIGS. 7 and 8, the upper plate and the lower plate forming the tube 101 have a curvature so as to be in contact with the inner surface of the pipe 1 on which the average bidirectional flow tube 100 is provided.

また、上記圧力計連結管105、105(b)は配管1内に流れる単相流動或いは二相流動流体と連通されるように設ける。なお、本実施形態では、隔板103前後において、チューブ101の上下に２つの圧力計連結管105、105(b)を設け、計４つの圧力計連結管105、105(b)を設けた例を開示している。もっとも、圧力計連結管105(b)を省略し、隔板103前後においてチューブ101の下にひとつの圧力計連結管105を設け、計２つの圧力計連結管105を設けた構成であってもよい。要するに、少なくとも計二つの圧力計連結管が隔板103前後に設けられていればよい。   The pressure gauge connecting pipes 105 and 105 (b) are provided so as to communicate with a single-phase flow or a two-phase flow fluid flowing in the pipe 1. In this embodiment, two pressure gauge connecting pipes 105 and 105 (b) are provided above and below the tube 101 before and after the partition plate 103, and a total of four pressure gauge connecting pipes 105 and 105 (b) are provided. Is disclosed. Of course, the pressure gauge connecting pipe 105 (b) is omitted, one pressure gauge connecting pipe 105 is provided below the tube 101 before and after the partition plate 103, and a total of two pressure gauge connecting pipes 105 are provided. Good. In short, it is sufficient that at least two pressure gauge connecting pipes are provided in front of and behind the partition plate 103.

また、望ましくは、上記平均両方向流動チューブ100をなす上記側板は互いに平行して設けられ、隔板103は上記側板に垂直に設けられ、上記上板及び下板は上記側板上部及び下部に配管1の内径部で接するように設けられている。上記上板及び下板の外面はパイプ内面に接するようにパイプ内面の曲率半径と同じ曲率半径を有する。なお、チューブ100の上下高さ寸法は、上板及び下板の外面をパイプ内面に接触させることができるように、配管1の上下内寸法に応じた値に設定されている。   Preferably, the side plates forming the average bidirectional flow tube 100 are provided in parallel with each other, the partition plate 103 is provided perpendicular to the side plate, and the upper plate and the lower plate are piped on the upper and lower sides of the side plate. It is provided so that it may contact | connect in the internal diameter part. The outer surfaces of the upper and lower plates have the same radius of curvature as that of the inner surface of the pipe so as to contact the inner surface of the pipe. The vertical height dimension of the tube 100 is set to a value corresponding to the vertical inner dimension of the pipe 1 so that the outer surfaces of the upper plate and the lower plate can be brought into contact with the inner surface of the pipe.

上記隔板103は上記側板の間に側板に垂直に設けられて上記チューブ101内に流れる流動を遮断する。上記隔板103を間において、その前後それぞれに二つの圧力計連結管105，105(b)が設けてあり、これらの圧力計連結管105，105(b)が上記隔板103の前後における圧力測定に使用される圧力計(図示せず)に連結される。   The partition plate 103 is provided perpendicularly to the side plate between the side plates, and blocks the flow flowing into the tube 101. Two pressure gauge connecting pipes 105 and 105 (b) are provided before and after the partition plate 103, respectively. These pressure gauge connecting pipes 105 and 105 (b) It is connected to a pressure gauge (not shown) used for measurement.

図９は本発明に基づく平均両方向流動チューブ100の平面断面形状を示したものである。図９に示したように、本発明に基づく平均両方向流動チューブ100をなす側板及び隔板103は薄い板で構成されることが望ましいが、これに限定するのではなく、図１０に示されるように、側板の断面形状を略円弧状に形成し、チューブ101全体の断面形状を略楕円または略円形に形成することが可能である。また、図１１に示されるように、側板の断面形状を略三角形に形成し、チューブ101全体の断面形状を略ダイヤモンド形（略ひし形）に形成することも可能である。   FIG. 9 shows a planar cross-sectional shape of an average bidirectional flow tube 100 according to the present invention. As shown in FIG. 9, the side plate and the partition plate 103 forming the average bidirectional flow tube 100 according to the present invention are preferably formed of a thin plate, but the present invention is not limited to this, and as shown in FIG. 10. In addition, the cross-sectional shape of the side plate can be formed in a substantially arc shape, and the cross-sectional shape of the entire tube 101 can be formed in a substantially elliptical shape or a substantially circular shape. Further, as shown in FIG. 11, it is also possible to form the cross-sectional shape of the side plate into a substantially triangular shape, and to form the cross-sectional shape of the entire tube 101 into a substantially diamond shape (substantially diamond shape).

この平均両方向流動チューブ100の動作をよくみると、図７のように、本発明に基づく平均両方向流動チューブ100が設けられた配管1内に左側から右側に流体の流動(Forward Flow)がある場合、隔板103の左側には流体流動による動圧と静圧の和である総圧が作用し、隔板103右側には流体速度による吸入効果により静圧より多少低い圧力である背圧が作用するようになる。そして、上記総圧及び背圧がそれぞれ圧力計連結管105、105(b)に連結された圧力計(図示せず)により計測されることにより総圧と背圧の差圧が算出されるか、圧力計連結管105、105(b)に差圧計(図示せず)を連結して該差圧が算出されることができる。   When the operation of the average bidirectional flow tube 100 is examined closely, as shown in FIG. 7, there is a fluid flow (Forward Flow) from the left side to the right side in the pipe 1 provided with the average bidirectional flow tube 100 according to the present invention. The total pressure, which is the sum of dynamic pressure and static pressure due to fluid flow, acts on the left side of the diaphragm 103, and the back pressure, which is slightly lower than the static pressure, acts on the right side of the diaphragm 103 due to the suction effect of the fluid velocity. To come. Then, whether the total pressure and the back pressure are calculated by a pressure gauge (not shown) connected to the pressure gauge connecting pipes 105 and 105 (b), respectively, to calculate the differential pressure between the total pressure and the back pressure. The differential pressure can be calculated by connecting a differential pressure gauge (not shown) to the pressure gauge connecting pipes 105 and 105 (b).

上記記載した本発明に基づく平均両方向流動チューブ100を使用してパイプ内を流れる流体の流動速度を測定する場合には、次のような効果がある。   When the flow rate of the fluid flowing in the pipe is measured using the average bidirectional flow tube 100 according to the present invention described above, the following effects are obtained.

静圧より低くなった背圧減少効果によって低速の流動が形成される流動条件で配管1内の平均流速測定が容易であり、配管1下部には液体が流れ、上部には気体が流れる等、配管1内に二相流動が発生する場合にも配管1内の流体の平均速度を測定することができ、また、配管内で急激な減圧が行なわれ、圧力計連結管105，105(b)に作用する圧力に急激な減圧が行なわれる場合にも、別途の冷却装置が必要でない。さらに、配管1内に二相流動が交互に発生するかパイプ内急激な減圧によって流体が相変化を受ける場合、さらに、水平配管で二相流流動発生によって成層流流動が発生する場合にも、平均両方向流動チューブ100を移送させる必要がなく、パイプ内を流れる流体の流れが変わる場合にも、流体の平均流動速度を測定することができる効果がある。   It is easy to measure the average flow velocity in the pipe 1 under the flow conditions in which low-speed flow is formed by the back pressure reduction effect that is lower than the static pressure, liquid flows in the lower part of the pipe 1, gas flows in the upper part, etc. Even when two-phase flow occurs in the pipe 1, the average speed of the fluid in the pipe 1 can be measured, and a sudden pressure reduction is performed in the pipe, so that the pressure gauge connecting pipes 105 and 105 (b) Even when a sudden pressure reduction is performed on the pressure acting on the chiller, a separate cooling device is not necessary. Furthermore, when two-phase flow alternately occurs in the pipe 1 or when the fluid undergoes a phase change due to sudden pressure reduction in the pipe, and further when a stratified flow occurs due to the two-phase flow generation in the horizontal pipe, Even when the average bidirectional flow tube 100 does not need to be transferred and the flow of the fluid flowing through the pipe changes, the average flow velocity of the fluid can be measured.

従来技術に基づくパイプに設けられたピトーチューブを示した側面断面図である。It is side surface sectional drawing which showed the pitot tube provided in the pipe based on a prior art. 従来技術に基づくパイプに設けられた平均ピトーチューブを示した側面断面図である。It is side surface sectional drawing which showed the average pitot tube provided in the pipe based on a prior art. 従来技術に基づくパイプに設けられた平均ピトーチューブを示した正面断面図である。It is front sectional drawing which showed the average pitot tube provided in the pipe based on a prior art. 従来技術に基づくパイプに設けられた局所両方向流動チューブを示した斜視図である。It is the perspective view which showed the local bidirectional flow tube provided in the pipe based on a prior art. 従来技術に基づくパイプに設けられた局所両方向流動チューブを示した側面断面図である。It is side surface sectional drawing which showed the local bidirectional flow tube provided in the pipe based on a prior art. 本発明に基づく平均両方向流動チューブを示した斜視図である。1 is a perspective view showing an average bidirectional flow tube according to the present invention. FIG. 本発明に基づくパイプに設けられた平均両方向流動チューブを示した側面断面図である。It is side surface sectional drawing which showed the average bidirectional flow tube provided in the pipe based on this invention. 図７の'Ｂ−Ｂ'線断面図である。FIG. 8 is a cross-sectional view taken along the line “BB” in FIG. 7. 図６の'Ｃ−Ｃ'線平面断面図である。FIG. 7 is a plan cross-sectional view taken along the line “CC” in FIG. 6. 図９に対応するものであって平均両方向流動チューブの望ましい他の実施例を示した図である。FIG. 10 is a view corresponding to FIG. 9 and showing another preferred embodiment of an average bidirectional flow tube. 図９に対応するものであって平均両方向流動チューブの望ましいさらに他の実施例を示した図である。FIG. 10 is a view corresponding to FIG. 9 and showing still another preferred embodiment of an average bidirectional flow tube.

符号の説明Explanation of symbols

1 配管
100 平均両方向流動チューブ
101 チューブ
103 隔板
105 圧力計連結管 1 Piping
100 average bidirectional flow tube
101 tubes
103 diaphragm
105 Pressure gauge connecting pipe

Claims (4)

二つの側板と上板及び下板からなるチューブと、
上記チューブをなす側板に垂直に設けられ、チューブの前後端を隔離する隔板と、
上記隔板前後に上記チューブの上板または下板に設けられる一組の圧力計連結管を含んで構成される平均両方向流動チューブであって、
上記チューブをなす上板及び下板は上記平均両方向流動チューブが設けられる配管内面と接するように曲率を有し、上記一組の圧力計連結管は配管内に流れる流体と連通されるように設けられることを特徴とする単相及び二相流動流量計測用の平均両方向流動チューブ。 A tube composed of two side plates and an upper plate and a lower plate;
A partition plate provided perpendicular to the side plate forming the tube and separating the front and rear ends of the tube;
An average both flow tubes configured to include a set pressure gauge connection tube provided in the upper plate or lower plate of the tube back and forth above the diaphragm,
The upper plate and the lower plate forming the tube have a curvature so as to contact the inner surface of the pipe on which the average bidirectional flow tube is provided, and the pair of pressure gauge connecting pipes are provided so as to communicate with the fluid flowing in the pipe. An average bidirectional flow tube for single-phase and two-phase flow measurement. 請求項１記載の平均両方向流動チューブであって、
上記チューブをなす側板は、断面形状が略三角形であって、上記チューブ断面形状が略ダイヤモンド形からなることを特徴とする平均両方向流動チューブ。 An average bidirectional flow tube according to claim 1,
An average bidirectional flow tube characterized in that the side plate forming the tube has a substantially triangular cross-sectional shape, and the tube cross-sectional shape is substantially diamond-shaped. 請求項１記載の平均両方向流動チューブであって、
上記チューブをなす側板の断面形状が略円弧形であって、上記チューブ断面形状が略楕円または略円形からなることを特徴とする平均両方向流動チューブ。 An average bidirectional flow tube according to claim 1,
An average bidirectional flow tube characterized in that the cross-sectional shape of the side plate forming the tube is substantially arc-shaped, and the tube cross-sectional shape is substantially elliptical or substantially circular. 請求項１記載の平均両方向流動チューブであって、  An average bidirectional flow tube according to claim 1,
上記一組の圧力計連結管に対向して上記上板または下板に設置される他の一組の圧力計連結管をさらに含んでなることを特徴とする平均両方向流動チューブ。  An average bidirectional flow tube, further comprising another set of pressure gauge connection pipes installed on the upper plate or the lower plate facing the set of pressure gauge connection pipes.
JP2004369585A 2004-04-06 2004-12-21 Average bidirectional flow tube Expired - Fee Related JP4048199B2 (en)

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