JPS5961716A - Weir type flow rate measuring apparatus - Google Patents
Weir type flow rate measuring apparatusInfo
- Publication number
- JPS5961716A JPS5961716A JP57170833A JP17083382A JPS5961716A JP S5961716 A JPS5961716 A JP S5961716A JP 57170833 A JP57170833 A JP 57170833A JP 17083382 A JP17083382 A JP 17083382A JP S5961716 A JPS5961716 A JP S5961716A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- notches
- weir
- flow
- cover
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/002—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow wherein the flow is in an open channel
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は水路に」１すを設け、越流する水割の大きさを
測定することによシ′Ｏｆｆ、喰測定を行う堰式流１１
１測定装置に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention provides a weir-type flow 11 that measures the flow rate by installing a weir in a waterway and measuring the size of overflowing water.
1. Regarding a measuring device.
ｐ１↓１図に従来用いられている堰式流量測定装置の代
表的な構成を示す。Figure p1↓1 shows a typical configuration of a conventionally used weir type flow rate measuring device.
第１図において、水が矢印方向に流れる水路１の途中に
設けられた堰２の切欠き部２ａ′ｆｃ越流する水位を水
位計３で測定し演３７器４で流量に対応した信号に演算
し、指示計５でその数値を読みとるというものである。In Fig. 1, the water level overflowing the notch 2a'fc of the weir 2, which is provided in the middle of the waterway 1 where water flows in the direction of the arrow, is measured by the water level gauge 3, and the signal corresponding to the flow rate is generated by the controller 4. The calculation is performed and the numerical value is read using the indicator 5.
かかる堰式流情、装置の測定積度について考察してみる
と次のようになる。If we consider the weir type flow and the measurement capacity of the device, we will see the following.
通常、測定誤差は定格値（最大目盛）に対する決められ
た割合で許容されている。例えば、許容誤差が５％、測
定範囲が０〜１００ ＋ｎ３／ ｈの流電測定装置につ
いて検討してみると下表のようになる。Normally, measurement errors are allowed at a predetermined percentage of the rated value (maximum scale). For example, if we consider a current measuring device with a tolerance of 5% and a measurement range of 0 to 100 +n3/h, the results will be as shown in the table below.
この表から明らかなように測定量が小さくなればなるほ
ど、相対誤差は大きくなる。As is clear from this table, the smaller the measured quantity, the larger the relative error.
ところで、浄水場、下水処理場などにおいては人口増加
などの要因によ′つて流入水面が次第に増大する。その
だめ、測定流量も徐々に増えて行く。Incidentally, at water treatment plants, sewage treatment plants, etc., the surface of inflow water gradually increases due to factors such as population increase. Unfortunately, the measured flow rate also increases gradually.
その比は１対４から１対１６程度である。この場合、ｉ
’ｊｌ：’、Ｍｉ測定装置１自１を晟終時点に於ける流
量に合わせて製作ずれＰＪ： 、ｒｌｆ 、”；”Ｈ’
＋の少ない時期に測定誤差が非′７ｉに大きくなる。The ratio is about 1:4 to 1:16. In this case, i
'jl:', manufacturing deviation PJ:, rlf, ``;''H' for Mi measurement device 1 to 1 according to the flow rate at the end of the night.
The measurement error becomes larger than non-'7i when there is less +.
このこと全解決するには流−ｂ：の増加に合わせて装置
〜、水路、堰、７寅ｑ器等を取外えることが考えらノす
る。しかし、その手数と’ｉ’＋” ）ＴＪ ｉｌ膨大
なものとなり、また、装ｆ＋’１′を１＆替える都度、
設備の稼動を長時１１旧て渡って停止トさせなけれｌｌ
ｌ：ならないという欠点を有する。In order to completely solve this problem, it would be considered to remove the equipment, water channels, weirs, 7 q equipment, etc. in accordance with the increase in flow -b:. However, the number of steps and 'i'+'') TJ il becomes enormous, and each time f+'1' is changed to 1&,
The operation of equipment must be stopped for an extended period of time.
l: It has the disadvantage that it does not.
し発明の目的〕
木つＣ；明の目的ｔま前−’＝ｚｆｌｙ迎従来技術の欠
点をなくし、小流：、４時から大流ｌ一時にわたって経
済的に、しかも精度良＜１ＩＩ１１定できる１１す式流
量測箱゛４−旧１１゛全提供するにある。Objective of the Invention: To eliminate the shortcomings of the prior art, it is possible to economically and accurately determine <1II11 from a small stream to a large stream at one o'clock. All 11 type flow measuring boxes (4-former 11) are provided.
〔発明の１１１°も要〕
本発明の１１”４１’徴とするところは堰の上側に複数
個の切欠き部を設けると共に、これら切欠き部にそれぞ
れ水の通流を阻止するカバーを取外し自在に取付け、流
量増加に従いカバーを取外し水の通流する切欠き部の数
を増加させるようにしたことにある。[111° of the invention is also required] Feature 11''41' of the present invention is that a plurality of notches are provided on the upper side of the weir, and a cover for blocking the flow of water is removed from each of these notches. It can be attached freely, and as the flow rate increases, the cover can be removed to increase the number of notches through which water flows.
第２図に本発明の一実施例を示す。 FIG. 2 shows an embodiment of the present invention.
第２図において第１図と異なるところは堰２に複数個の
切欠き部２ａを設け、各切欠き部２ａにそれぞれ水の越
流を阻止するカバー６を設けたことである。第２図は３
個の切欠き部２ａを設け、２個の切欠き部２ａにカバー
６を取付けだ状態を示している。なお、切欠き部２ａの
面積は第１図に比べ小さくなっている。The difference between FIG. 2 and FIG. 1 is that the weir 2 is provided with a plurality of notches 2a, and each of the notches 2a is provided with a cover 6 for preventing water from overflowing. Figure 2 is 3
The figure shows a state in which two notches 2a are provided and the cover 6 is attached to the two notches 2a. Note that the area of the notch 2a is smaller than that in FIG.
この措成において水位計３で測定された水位■］が演算
器４に入力される。演算器４ ＆二ｌ：次式に従い流量
Ｑ（ｍＲ／祿）を求める。In this process, the water level [■] measured by the water level meter 3 is input to the calculator 4. Calculator 4 & 2: Calculate the flow rate Q (mR/Y) according to the following formula.
Ｑ −Ｋ ｂ ｂ ’／” ・・・
・・・・・・（１）ｂ：切欠き部２ａの幅（Ｉｎ）
ｈ：越流水頭（ｍ）
Ｉ（：流１を係数
なお、越流水頭１１−水路ｌの底面から切欠き部２ａの
下端までの距ｈ１＃をｔとするとＴＩ−ｔで求められる
。Q −K b b '/”...
・・・・・・(1)b: Width of notch 2a (In) h: Overflow head (m) I Letting t be the distance h1# to the lower end of 2a, it is determined by TI-t.
とのようにし、で演遭器４で求められたｆＪｔＣ漬Ｑが
流量指示用５に指示される。Then, the fJtC-Q obtained by the detector 4 is instructed to the flow rate indicator 5.
さて、測定流：ｉ；が増加したならば１個の切欠き部２
のカバー６を取外して２個の切欠き部２ａから越流する
ようにする。越流する切欠き部２ａを２個にしても濱（
９器４け越流水頭１１から流；４Ｑを求めているので１
ｆｒＡＩの一〕欠き部２ａからＪＩＱ ｉｙ’ｃ Ｌ
でいるときと同じ演算測定流嘔を求めている。したがっ
て、この場合には指示計５の指示値を２倍にすれは実際
の流Ｍ、を測定できる。ただし、越流する切欠き部２ａ
が１個のときにおける指示用５の目盛を２１八にすれば
指示Ｈ１の指示値が実際の（、Ｈ（、＠となる。Now, if the measured flow: i; increases, one notch 2
The cover 6 is removed to allow the flow to overflow from the two notches 2a. Even if the number of notches 2a for overflowing water is two, the beach (
Flow from 9 vessels 4 overflow head 11; Since we are looking for 4Q, 1
frAI] JIQ iy'c L from the notch 2a
I am looking for the same calculation and measurement as when I was in the hospital. Therefore, in this case, the actual flow M can be measured by doubling the indicated value of the indicator 5. However, the notch 2a where the flow overflows
If the scale of the indicator 5 is set to 218 when is one, the indicated value of the indicator H1 becomes the actual (, H(, @).
μ上のようにして流−μ測定するのであるが、測定流量
が増えるに従って１個ずつ、あるいは複数個ずつカバー
６を取外して行くと、切欠き部２ａが］、 １＋１１の
場合に比べ切欠き数をｎとするとｎ培まで測定できる。The flow rate - μ is measured as shown above, but as the measured flow rate increases, the covers 6 are removed one by one or several at a time. If the number is n, it is possible to measure up to n cultures.
また、切欠き部２ａの１個当りの測定範囲は小さいので
小水６１時にも精度よく測定することができる。Furthermore, since the measurement range of each notch 2a is small, it is possible to accurately measure even when the water is small.
第３図は本発明の他の実施例を示し、切欠き部を三角に
したものである。FIG. 3 shows another embodiment of the present invention, in which the notch is triangular.
第３図において第２図と異なるのは堰２に三角の切欠き
部２ｂ’に設けたことである。なお、この場合、流量Ｑ
は次式で求められる。What differs from FIG. 2 in FIG. 3 is that the weir 2 is provided with a triangular notch 2b'. In this case, the flow rate Q
is calculated using the following formula.
Ｑ＝Ｋｈ’汐 ・・・・・・・・・
（２）第３図の実施例においても第２図と同様にして流
袖測定できるのは明らかであろう。Q=Kh'shio ・・・・・・・・・
(2) It is obvious that the flow sleeve measurement can be performed in the embodiment shown in FIG. 3 in the same manner as in FIG. 2.
以上説明したように本発明は小流量時にも１８度良く測
定することができ、また、測定範囲を変更するためのカ
バーは単に流れをせきとめるものであればよく、安価に
できる。また、測定範囲の変更はカバーを取外すだけで
よく、極めて簡昨に短時間で行える。As explained above, the present invention can measure accurately 18 degrees even when the flow rate is small, and the cover for changing the measurement range can be used as long as it simply blocks the flow, making it possible to reduce the cost. Additionally, changing the measurement range can be done simply by removing the cover, making it extremely easy and quick.
なお、上述の実施例は四角あるいは三角の切欠き部を３
個設けているが、種々の条件によって、、Ｉ＋′１与な
った形状、個数にすることもできるのは勿論である。Note that the above embodiment has three square or triangular notches.
However, depending on various conditions, it is of course possible to have a shape and number of I+'1.
第１図は従来のノ旧式流量測定装置の一例を示す構成図
、第２図は本発明の一実施例を示す構成図、第３図ｄ本
発明の他の実施例を示す要部構成図である。
１・・・水路、２・・・堰、２ａ、２ｂ・・・切欠き部
、３・・・水位側、４・・・演算器、５・・・流−ｔａ
−指示計、６・・・カバー）
ツ＼
１ ／ 図
作２ 図
（ａ） （ｂ）
Ｑ〜５
￥ ３ 図Fig. 1 is a block diagram showing an example of a conventional old-style flow rate measuring device, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 d is a block diagram showing main parts of another embodiment of the present invention. It is. DESCRIPTION OF SYMBOLS 1... Channel, 2... Weir, 2a, 2b... Notch part, 3... Water level side, 4... Arithmetic unit, 5... Flow-ta
-Indicator, 6...Cover) ＼ 1 / Diagram 2 Diagram (a) (b)
Q~5 ￥ 3 Figure
Claims (1)
置１ｆｆ１．において、堰の上側に複数個のり欠き部を
設けると共にこれら切欠き部にそれぞれ水の通流を阻止
するカバーを取外し自在に取付け、前記水路の流量増加
に従い前記カバーを取外し水の通流する切欠き部を増加
させるようにしたことを特徴とする堰式流、１１１−測
定装置べ、。1. Weir-type flow that measures the flow rate by installing a weir in the waterway - Measuring device 1ff1. In this method, a plurality of notches are provided on the upper side of the weir, and a cover for blocking water flow is removably attached to each of these notches, and as the flow rate of the waterway increases, the cover is removed and a cutout for water to flow is provided. 111-Measuring device for weir type flow characterized by increasing the number of notches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57170833A JPS5961716A (en) | 1982-10-01 | 1982-10-01 | Weir type flow rate measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57170833A JPS5961716A (en) | 1982-10-01 | 1982-10-01 | Weir type flow rate measuring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5961716A true JPS5961716A (en) | 1984-04-09 |
| JPH0359366B2 JPH0359366B2 (en) | 1991-09-10 |
Family
ID=15912173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57170833A Granted JPS5961716A (en) | 1982-10-01 | 1982-10-01 | Weir type flow rate measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5961716A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63200727U (en) * | 1987-06-15 | 1988-12-23 | ||
| IT201900014127A1 (en) * | 2019-08-06 | 2021-02-06 | Carlo Marelli | EQUIPMENT FOR CONTINUOUS REMOTE MEASUREMENT OF THE FLOW OF WATER ON BODY MOUNTING PORTS FOR IRRIGATION |
| WO2022210282A1 (en) * | 2021-04-01 | 2022-10-06 | ジャパン マリンユナイテッド株式会社 | Lubricant flow sensor and ship comprising same |
-
1982
- 1982-10-01 JP JP57170833A patent/JPS5961716A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63200727U (en) * | 1987-06-15 | 1988-12-23 | ||
| JPH0619052Y2 (en) * | 1987-06-15 | 1994-05-18 | 株式会社テイエルブイ | Liquid flow meter |
| IT201900014127A1 (en) * | 2019-08-06 | 2021-02-06 | Carlo Marelli | EQUIPMENT FOR CONTINUOUS REMOTE MEASUREMENT OF THE FLOW OF WATER ON BODY MOUNTING PORTS FOR IRRIGATION |
| WO2021024174A1 (en) * | 2019-08-06 | 2021-02-11 | Carlo Marelli | Apparatus for the continuous remote measuring of the flowrate of water in bulkhead-holder openings for irrigation |
| WO2022210282A1 (en) * | 2021-04-01 | 2022-10-06 | ジャパン マリンユナイテッド株式会社 | Lubricant flow sensor and ship comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0359366B2 (en) | 1991-09-10 |
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