JPH0227220A - Differential pressure type steam flowmeter - Google Patents
Differential pressure type steam flowmeterInfo
- Publication number
- JPH0227220A JPH0227220A JP17787588A JP17787588A JPH0227220A JP H0227220 A JPH0227220 A JP H0227220A JP 17787588 A JP17787588 A JP 17787588A JP 17787588 A JP17787588 A JP 17787588A JP H0227220 A JPH0227220 A JP H0227220A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- dryness
- primary side
- flow rate
- pressure
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 229920006395 saturated elastomer Polymers 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000013021 overheating Methods 0.000 abstract 1
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
本発明は蒸気配管中にノズル、ベンチュリ、オリフィス
等の絞り機構を設け、その上下流部の間に発生する差圧
から流量を測定する、差圧式流量測定装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a differential pressure system in which a restriction mechanism such as a nozzle, venturi, orifice is provided in a steam pipe, and the flow rate is measured from the differential pressure generated between the upstream and downstream parts. This invention relates to a flow rate measuring device.
蒸気配管を流れる蒸気の流量を測定すれば、蒸気使用機
器で消費する蒸気の量が判り、蒸気使用機器の加熱効率
を改善するデータが得られ、有益である。Measuring the flow rate of steam flowing through steam piping is useful because it determines the amount of steam consumed by steam-using equipment and provides data for improving the heating efficiency of steam-using equipment.
従来の技術
一般的な差圧式蒸気流量計を第２図を参照して説明する
。2. Description of the Related Art A common differential pressure type steam flowmeter will be explained with reference to FIG.
蒸気配管２１の途中に絞り機構２２を設ける。A throttle mechanism 22 is provided in the middle of the steam pipe 21.
絞り機構２２の一次側２３と二次側２４を、それぞれ導
圧配管２５．２６を介して流量計２７に連結する。一次
側の圧力を検出する圧力センサ２８を取り付けて信号線
３０を介して流量計２７に入力する。流量計２７で一次
側圧力と、一次側と二次側の差圧とから蒸気の流量を演
譚表示する。The primary side 23 and secondary side 24 of the throttle mechanism 22 are connected to a flow meter 27 via pressure piping 25, 26, respectively. A pressure sensor 28 is attached to detect the pressure on the primary side and inputted to the flow meter 27 via a signal line 30. A flow meter 27 displays the steam flow rate based on the primary side pressure and the differential pressure between the primary side and the secondary side.
本発明が解決しようとする問題点
蒸気配管を流れる蒸気が湿り蒸気の場合、その比重量は
湿り度（乾き度）によって変化する。従って、上記のも
のでは屹き度を考慮せず、単に一次側圧力と差圧とから
流量を演算するだけでおるので、蒸気流量の測定精度が
悪い問題があった。Problems to be Solved by the Invention When the steam flowing through the steam pipe is wet steam, its specific weight changes depending on the wetness (dryness). Therefore, in the above method, the flow rate is simply calculated from the primary side pressure and the differential pressure without considering the degree of steam flow, so there is a problem that the measurement accuracy of the steam flow rate is poor.
従って、本発明の技術的課題は、乾き度補正を行なって
正確な蒸気流量を測定できるようにすることでおる。Therefore, the technical problem of the present invention is to perform dryness correction so as to be able to accurately measure the steam flow rate.
問題点を解決するための手段
上記の技術的課題を解決するために講じた本発明の技術
的手段は、蒸気配管に絞り機構を設け、絞り機構の一次
側圧力と、絞り機構の一次側と二次側との差圧とを検出
して、流量を測定する差圧式蒸気流量計に於いて、絞り
機構の一次側の蒸気乾き度を検出する屹き度検出手段を
設け、一次側圧力と差圧と乾き度から蒸気流量を測定す
るようにした、ものである。Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problems is to provide a throttling mechanism in the steam piping, and to reduce the pressure on the primary side of the throttling mechanism and the pressure on the primary side of the throttling mechanism. In a differential pressure steam flowmeter that measures the flow rate by detecting the pressure difference between the primary side and the secondary side, a dryness detection means is provided to detect the dryness of the steam on the primary side of the throttle mechanism. It measures steam flow rate from differential pressure and dryness.
作用 上記の技術的手段の作用は下記の通りである。action The operation of the above technical means is as follows.
絞り機構の上下流部間の差圧が流量計に入力される。絞
り機構の一次側の蒸気圧力が圧力検出手段で検出されて
流量計に入力される。また、絞り機構の一次側の蒸気の
乾き度が乾き度検出手段で検出されて流量計に入力され
る。絞り機構を通じての流体の質量流量は比重量の平方
根に比例する。The differential pressure between the upstream and downstream parts of the throttle mechanism is input to the flowmeter. Steam pressure on the primary side of the throttle mechanism is detected by the pressure detection means and input to the flow meter. Further, the dryness of the steam on the primary side of the throttle mechanism is detected by the dryness detection means and inputted to the flow meter. The mass flow rate of fluid through the restriction mechanism is proportional to the square root of the specific weight.
従って、乾き飽和蒸気の流量は差圧ｂｏと比重量１／ｖ
“に比例し、
ｗ＝ｋＪΣ■−〒フへＦ
となる。Therefore, the flow rate of dry saturated steam is the differential pressure bo and the specific weight 1/v
``, w=kJΣ■−〒FheF.
湿り蒸気の比容積Ｖは乾き度をＸとすると、ｖ＝ｖｘ十
ｖ （１−ｘ）
となり、湿り蒸気の比容積の、乾き飽和蒸気のそれに対
する比は、
ｖ／ｖ”＝ｘ十ｖ （１−ｘ）／ｖ“
となる。The specific volume V of wet steam is v=vx0v (1-x), where the degree of dryness is X, and the ratio of the specific volume of wet steam to that of dry saturated steam is v/v"=x10v (1-x)/v".
ｖ”／ ｖ’は非常に大きな値で市るから、Ｖ／Ｖ＝Ｘ とすることができる。Since v”/v’ is a very large value, V/V=X It can be done.
従って、湿り蒸気の流量は、 として演算することができる。Therefore, the flow rate of wet steam is It can be calculated as
発明の効果 本発明は下記の特有の効果を生じる。Effect of the invention The present invention produces the following unique effects.
上記のように本発明では、たき度で補正して蒸気流量を
演算するので、正確な蒸気流量を測定することができる
。また、湿り蒸気中の乾き飽和蒸気の流量あるいは水の
流量を演算表示することもできる。As described above, in the present invention, since the steam flow rate is calculated by correcting the steam flow rate, it is possible to accurately measure the steam flow rate. It is also possible to calculate and display the flow rate of dry saturated steam in wet steam or the flow rate of water.
実施例
上記の技術的手段の具体例を示す実施例を説明する（第
１図参照）。Embodiment An embodiment illustrating a specific example of the above technical means will be described (see FIG. 1).
蒸気配管１の途中に絞り機構２を設ける。絞り機構２の
一次側３と二次側４を、それぞれ導圧配管５．６を介し
て流量計７に連結する。一次側３の圧力を検出する圧力
センサ８と、一次側３の蒸気の乾き度を検出する乾き度
セン１す９を取り付ける。両センサからの検出信号は、
信号線１０．１１を介して流量計７に入力される。乾き
度センサ９は、湿り蒸気をオリフィス１２を通して温度
センサ１５と圧力センサ１６を取り付けた測定容器１４
内に噴射して断熱膨張させ、過熱状態とし、温度センサ
１５と圧力センサ１６からの信号を演算器１７に入力し
、予め記憶させたモリエール線図、または飽和蒸気表、
過熱蒸気表に基づいて乾き度を測定するものでおる。A throttle mechanism 2 is provided in the middle of a steam pipe 1. The primary side 3 and secondary side 4 of the throttling mechanism 2 are each connected to a flow meter 7 via a pressure piping 5.6. A pressure sensor 8 for detecting the pressure on the primary side 3 and a dryness sensor 19 for detecting the dryness of the steam on the primary side 3 are attached. The detection signals from both sensors are
It is input to the flow meter 7 via the signal line 10.11. The dryness sensor 9 passes wet steam through an orifice 12 to a measurement container 14 equipped with a temperature sensor 15 and a pressure sensor 16.
The signals from the temperature sensor 15 and the pressure sensor 16 are input to the calculator 17, and a pre-stored Molière diagram or saturated steam table is used.
The dryness is measured based on the superheated steam table.
第１図は本発明の実施例の差圧式蒸気流量計の概略的構
成図、第２図は従来の差圧式流量計の概略的構成図でお
る。
１：蒸気配管 ２：絞り機構
３ニ一次側 ４：二次側
７：流量計 ８：圧力センサ９：乾き度セン
サFIG. 1 is a schematic diagram of a differential pressure steam flow meter according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a conventional differential pressure steam flow meter. 1: Steam piping 2: Throttle mechanism 3 primary side 4: Secondary side 7: Flow meter 8: Pressure sensor 9: Dryness sensor
Claims (1)
と、絞り機構の一次側と二次側との差圧とを検出して、
流量を測定する差圧式蒸気流量計に於いて、絞り機構の
一次側の蒸気乾き度を検出する乾き度検出手段を設け、
一次側圧力と差圧と乾き度から蒸気流量を測定するよう
にした差圧式蒸気流量計。1. Provide a throttle mechanism in the steam piping, detect the pressure on the primary side of the throttle mechanism and the differential pressure between the primary side and the secondary side of the throttle mechanism,
In a differential pressure steam flow meter that measures flow rate, a dryness detection means is provided to detect the dryness of the steam on the primary side of the throttle mechanism,
A differential pressure steam flowmeter that measures the steam flow rate from the primary pressure, differential pressure, and dryness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17787588A JPH0227220A (en) | 1988-07-15 | 1988-07-15 | Differential pressure type steam flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17787588A JPH0227220A (en) | 1988-07-15 | 1988-07-15 | Differential pressure type steam flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0227220A true JPH0227220A (en) | 1990-01-30 |
Family
ID=16038586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17787588A Pending JPH0227220A (en) | 1988-07-15 | 1988-07-15 | Differential pressure type steam flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0227220A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03265910A (en) * | 1990-03-15 | 1991-11-27 | Tlv Co Ltd | Steam pressure reducing valve with flow rate measuring function |
| JPH03265909A (en) * | 1990-03-15 | 1991-11-27 | Tlv Co Ltd | Steam pressure reducing valve containing calorimetric function |
| JP2010160054A (en) * | 2009-01-08 | 2010-07-22 | Yamatake Corp | Steam flow meter and differential pressure transmitter |
| JP2014081214A (en) * | 2012-10-12 | 2014-05-08 | Azbil Corp | Steam flow measurement system and steam flow measurement method |
-
1988
- 1988-07-15 JP JP17787588A patent/JPH0227220A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03265910A (en) * | 1990-03-15 | 1991-11-27 | Tlv Co Ltd | Steam pressure reducing valve with flow rate measuring function |
| JPH03265909A (en) * | 1990-03-15 | 1991-11-27 | Tlv Co Ltd | Steam pressure reducing valve containing calorimetric function |
| JP2010160054A (en) * | 2009-01-08 | 2010-07-22 | Yamatake Corp | Steam flow meter and differential pressure transmitter |
| JP2014081214A (en) * | 2012-10-12 | 2014-05-08 | Azbil Corp | Steam flow measurement system and steam flow measurement method |
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