JPH10185635A - Flow rate measuring system - Google Patents
Flow rate measuring systemInfo
- Publication number
- JPH10185635A JPH10185635A JP8347071A JP34707196A JPH10185635A JP H10185635 A JPH10185635 A JP H10185635A JP 8347071 A JP8347071 A JP 8347071A JP 34707196 A JP34707196 A JP 34707196A JP H10185635 A JPH10185635 A JP H10185635A
- Authority
- JP
- Japan
- Prior art keywords
- water
- tank
- flow rate
- channel
- tunnel
- 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.)
- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 230000001133 acceleration Effects 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 5
- 238000007726 management method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Flow Control (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は流量計測システムに
関し、特に農業用水管理の閉水路の流量計測システムに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow rate measuring system, and more particularly to a closed flow rate measuring system for agricultural water management.
【０００２】[0002]
【従来の技術】今日、農業用水はダムや大規模の河川を
水源として、「水路」により最終需要家まで供給されて
いる。従って、水源から末端の需要家までは、長距離且
つ広範囲になる。そのため、広範囲に用水を供給するに
は、ダムをはじめとして、揚水機場（ポンプ場）、排水
機場、加圧ポンプ場、ファームポンド（水槽）などが必
要となるほか、水路の途中には水の分岐用に分岐バルブ
等が設けられている。2. Description of the Related Art Today, agricultural water is supplied to end users through "waterways" using dams and large-scale rivers as water sources. Therefore, the distance from the water source to the end customer is long and wide. Therefore, in order to supply water over a wide area, a pumping station (pumping station), a drainage station, a pressurized pumping station, a farm pond (water tank), etc. are required, as well as a dam. A branch valve or the like is provided for branching.
【０００３】各施設には水位計、流量計（超音波式、電
磁式等）等が設置され、水の過不足がないかどうかを管
理している。また、ポンプ等の設備の状態も適切に管理
する必要がある。広域（範囲）に散在したこれらの施設
のデータを１カ所（中央管理所）に集めて、少数の人員
で管理するためのシステムが「農業用水管理システム」
であり、次のような装置から構成される。１）センサ
（流量計、水位計等）、２）テレメータ、テレコントロ
ール装置（遠方の施設と公衆回線を使用してのデータの
交換・伝送を行う）、３）操作卓、監視盤（中央管理所
で施設の監視・制御を行う）、４）データ処理装置（収
集したデータの表示・蓄積・記録を行う）。[0003] Each facility is provided with a water level meter, a flow meter (ultrasonic type, electromagnetic type, etc.), and manages whether there is no excess or deficiency of water. In addition, it is necessary to appropriately manage the state of equipment such as a pump. "Agricultural water management system" is a system for collecting data of these facilities scattered over a wide area (range) in one place (central management office) and managing it with a small number of people.
And comprises the following device. 1) Sensors (flow meters, water level meters, etc.) 2) Telemeters, telecontrol devices (exchange and transmission of data using distant facilities and public lines) 3) Operator consoles, monitoring panels (central control) 4) Data processing device (displays, accumulates, and records collected data).
【０００４】特開昭５９−２１６０００号公報には、下
水処理場等における流量計の数を減らす方法が提案され
ている。下水処理場等においては、汚水等をいったんい
くつかのポンプ井にため、これらのポンプ井毎に設置さ
れたポンプで、さらに高いところにある吐出槽に送水
し、そこで一時蓄えた後、落差を利用してパイプライン
により他所に送水する。この際、ポンプ井の各ポンプ毎
の揚水流量を計測する必要がある。しかし、流量計は高
価であるので、ポンプの台数だけ流量計を設けるのは経
済的でない。Japanese Patent Laid-Open Publication No. Sho 59-216000 proposes a method for reducing the number of flow meters in a sewage treatment plant or the like. In a sewage treatment plant, etc., once the wastewater is stored in several pump wells, pumps installed for each of these pump wells send water to a discharge tank at a higher place, where they are temporarily stored. It is used to send water to other places by pipeline. At this time, it is necessary to measure the pumping flow rate of each pump in the pump well. However, since the flow meters are expensive, it is not economical to provide the flow meters as many as the number of pumps.
【０００５】従って、特開昭５９−２１６０００号公報
に記載された提案には、各ポンプ井の水位と、吐出槽の
水位の差（水位差；ポンプの揚程）から、ポンプの特性
を基にポンプの出力を逆算して、ポンプの出力を制御す
ることにより、ポンプ毎に流量計を設けることなく、シ
ステムを維持する方法が示されている。[0005] Therefore, the proposal described in Japanese Patent Application Laid-Open No. 59-216000 is based on the characteristics of the pump based on the difference between the water level of each pump well and the water level of the discharge tank (water level difference; pump head). A method is shown for maintaining the system by back-calculating the pump output and controlling the pump output without having to provide a flow meter for each pump.
【０００６】[0006]
【発明が解決しようとする課題】特開昭５９−２１６０
００号公報に記載された提案は、いくつかのポンプ井か
らポンプで吐水槽まで揚水するシステムにおける、ポン
プ毎の流量計をなくすことについての提案であって、農
業用水路のように、圧力をかけず（ポンプ等を使用せず
に）に、水位差だけで自然流下させて送水するシステム
には適用できない。Problems to be Solved by the Invention JP-A-59-2160
The proposal described in Japanese Patent Publication No. 00 is a proposal for eliminating a flow meter for each pump in a system for pumping water from several pump wells to a water discharge tank. This method cannot be applied to a system in which water flows naturally (without using a pump or the like) and water flows only due to a difference in water level.
【０００７】農業用水路の場合、従来は水路に流量計を
設けて、流量計測を行っていた。農業用水路は、上下水
道等に比較して流量が多く、水路の径が大きい。従っ
て、設置する流量計は大口径のものとなり、きわめて高
価なものとなる。流量計の価格は、口径に対して指数関
数的に増大する。また、特殊なものになるため、納期が
かかる。さらに、無圧閉水路（トンネル）に流量計を設
ける場合は、導水口を設ける必要があり、どうしてもメ
ンテナンスしにくいことにもなる。また、充分な直管長
が必要で、メンテナンス用にピット（マンホール）が必
要になるなど、設置上の問題も多い。In the case of an agricultural waterway, a flowmeter is conventionally provided in the waterway to measure the flow rate. Agricultural irrigation canals have a larger flow rate than water and sewage systems, and have a larger diameter. Therefore, the installed flow meter has a large diameter and is extremely expensive. The price of a flow meter increases exponentially with caliber. In addition, because it is special, it takes delivery time. Further, when a flow meter is provided in a non-pressure closed water channel (tunnel), it is necessary to provide a water introduction port, which makes maintenance difficult. In addition, there are many installation problems, such as a sufficient straight pipe length and a pit (manhole) for maintenance.
【０００８】高い測定精度（例えば１％の誤差）が要求
されるされる場合は、流量計の使用が不可欠であるが、
農業用水のように例えば１０〜１５％の誤差で充分な場
合には、高価な流量計を使用するのは不経済である。When high measurement accuracy (for example, 1% error) is required, the use of a flow meter is indispensable.
If an error of, for example, 10-15% is sufficient, such as for agricultural water, it is uneconomical to use expensive flow meters.
【０００９】本発明の目的は、農業用水路において流量
計を使用せずに、閉水路（パイプライン等の水が充満し
ている管路）の流量を、計測する流量計測システムを提
供することである。An object of the present invention is to provide a flow rate measuring system for measuring a flow rate in a closed waterway (a pipeline filled with water such as a pipeline) without using a flowmeter in an agricultural waterway. is there.
【００１０】[0010]
【課題を解決するための手段】本発明による配水槽の出
水槽から送水路トンネルを介して受水槽へ自然流下で配
水する用水路において、前記出水槽と前記受水槽とに水
位を計測する水位計を設けた前記送水路トンネルの流量
計測システムは、前記出水槽と前記受水槽の水位差と、
前記送水路トンネルの寸度から前記送水路トンネルの流
量を演算によって計測することを特徴とする。SUMMARY OF THE INVENTION A water level gauge for measuring the water level in the water discharge tank and the water receiving tank in a water channel that naturally distributes water from the water discharging tank of the water distribution tank to the water receiving tank via the water channel tunnel according to the present invention. The flow rate measuring system of the water channel tunnel provided with the water level difference between the water tank and the receiving tank,
It is characterized in that the flow rate of the waterway tunnel is calculated by calculation from the dimensions of the waterway tunnel.
【００１１】また、前記送水路トンネルの流量を演算す
る際に、前記出水槽と前記受水槽との水位差をΔＨ、前
記送水路トンネルの断面積をＡ、係数をＫ、重力加速度
をｇとしたとき、前記送水路トンネルに流れる水の流量
Ｑを、Ｑ＝ＡＫ√（２ｇΔＨ）なる演算式により演算し
て計測することを特徴とする。When calculating the flow rate of the water channel tunnel, the difference between the water level between the water discharge tank and the water receiving tank is ΔH, the sectional area of the water channel tunnel is A, the coefficient is K, and the gravitational acceleration is g. Then, the flow rate Q of the water flowing in the water channel tunnel is calculated and calculated by an arithmetic expression of Q = AK√ (2gΔH).
【００１２】本発明の作用は次の通りである。閉水路の
流量を、水路前段の配水槽の出口槽と水路後段の受水槽
とに水位計を設け、この両水位の水位差から演算により
求める。The operation of the present invention is as follows. The flow rate of the closed water channel is determined by calculating the water level difference between the two water levels by providing a water level gauge in the outlet tank of the water distribution tank in the front stage of the water channel and the water receiving tank in the rear stage of the water channel.
【００１３】[0013]
【発明の実施の形態】以下に、本発明の実施例について
図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】図１は本発明によるの実施例の構成を示す
断面図である。図１において、本発明による閉水路の流
量計測システムが適用される農業用水路は、農業用水の
供給元である配水槽１、配水槽１が空になるのを防ぐた
めの出口槽２、閉水路の配管水路である送水路トンネル
４、配水先の受水槽３、出水槽２及び受水槽３の水位を
計測する水位計５及び６で構成される。FIG. 1 is a sectional view showing the structure of an embodiment according to the present invention. In FIG. 1, an agricultural waterway to which the closed-channel flow rate measuring system according to the present invention is applied includes a water distribution tank 1 that is a supply source of agricultural water, an outlet tank 2 for preventing the water distribution tank 1 from being empty, a closed waterway. And a water level gauge 5 and 6 for measuring the water level in the water receiving tank 3, the water receiving tank 2, and the water receiving tank 3 which are distribution destinations.
【００１５】本発明の実施例の動作は、例えば河川から
取水された配水すべき水は、配水槽１に蓄えられ、この
配水槽１が空になるのを防ぐための隔壁１−１を越え
て、給水される出口槽２から送水路トンネル４を介し
て、農業用水の需要先にある受水槽３へと配水される。The operation of the embodiment of the present invention is as follows. For example, water to be distributed from a river is stored in a distribution tank 1 and passes over a partition 1-1 for preventing the distribution tank 1 from being emptied. Then, water is supplied from the outlet tank 2 to which water is supplied to the water receiving tank 3 located at the destination of the agricultural water via the water channel tunnel 4.
【００１６】今、出水槽２と受水槽３との水位差（水位
計５及び６によって測定された）をΔＨ、送水路トンネ
ル４の断面積をＡ、係数をＫ（例えばＫ＝０．７４６７
７）、重力加速度をｇとすると、送水路トンネル４に流
れる水の流量Ｑは、Ｑ＝ＡＫ√（２ｇΔＨ）で与えられ
る。この式はマニング式と呼ばれ、無圧閉水路の流量を
求めることができる。Now, the difference between the water level between the water tank 2 and the water receiving tank 3 (measured by the water level gauges 5 and 6) is ΔH, the sectional area of the waterway tunnel 4 is A, and the coefficient is K (for example, K = 0.7467).
7) Assuming that the gravitational acceleration is g, the flow rate Q of the water flowing through the water channel tunnel 4 is given by Q = AK√ (2gΔH). This formula is called a Manning formula, and can determine the flow rate of the non-pressure closed channel.
【００１７】このマニング式により、流量計を使用せず
に、送水路トンネル４の流量を算出（計測）できる。According to this Manning formula, the flow rate of the water channel 4 can be calculated (measured) without using a flow meter.
【００１８】[0018]
【発明の効果】以上説明したように本発明は、流量計を
使用せずに、農業用水の送水路トンネルの流量を算出
（計測）できる効果がある。As described above, the present invention has the effect of calculating (measuring) the flow rate of the agricultural water supply channel tunnel without using a flow meter.
【図１】本発明の実施例の断面図である。FIG. 1 is a sectional view of an embodiment of the present invention.
１ 配水槽 １−１ 隔壁 ２ 出水槽 ３ 受水槽 ４ 送水路トンネル ５，６ 水位計 DESCRIPTION OF SYMBOLS 1 Distribution tank 1-1 Partition wall 2 Outflow tank 3 Receiving tank 4 Water tunnel Tunnel 5, 6 Water level gauge
Claims (2)
して受水槽へ自然流下で配水する用水路において、前記
出水槽と前記受水槽とに水位を計測する水位計を設けた
前記送水路トンネルの流量計測システムであって、前記
出水槽と前記受水槽の水位差と、前記送水路トンネルの
寸度から前記送水路トンネルの流量を演算によって計測
することを特徴とする流量計測システム。1. A water channel for distributing water under a natural flow from a water discharge tank of a water distribution tank to a water receiving tank via a water channel tunnel, wherein the water channel tunnel provided with a water level meter for measuring the water level in the water tank and the water receiving tank. The flow rate measuring system according to any one of claims 1 to 3, wherein a flow rate of the water channel is calculated from a water level difference between the water tank and the water receiving tank and a dimension of the water channel.
に、前記出水槽と前記受水槽との水位差をΔＨ、前記送
水路トンネルの断面積をＡ、係数をＫ、重力加速度をｇ
としたとき、前記送水路トンネルに流れる水の流量Ｑ
を、Ｑ＝ＡＫ√（２ｇΔＨ）なる演算式により演算して
計測することを特徴とする請求項１記載の流量計測シス
テム。2. When calculating the flow rate of the waterway tunnel, the difference in water level between the water discharge tank and the water receiving tank is ΔH, the sectional area of the waterway tunnel is A, the coefficient is K, and the gravitational acceleration is g.
, The flow rate Q of the water flowing through the waterway tunnel
The flow rate measurement system according to claim 1, wherein is calculated by an arithmetic expression of Q = AK√ (2gΔH).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8347071A JPH10185635A (en) | 1996-12-26 | 1996-12-26 | Flow rate measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8347071A JPH10185635A (en) | 1996-12-26 | 1996-12-26 | Flow rate measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10185635A true JPH10185635A (en) | 1998-07-14 |
Family
ID=18387725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8347071A Withdrawn JPH10185635A (en) | 1996-12-26 | 1996-12-26 | Flow rate measuring system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10185635A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003035575A (en) * | 2001-07-19 | 2003-02-07 | Dmw Corp | Pump flow measurement method and pump flow measurement device |
| WO2008095234A1 (en) * | 2007-02-06 | 2008-08-14 | Samaran International Pty Ltd | Flow sensor |
| CN105892506A (en) * | 2016-05-13 | 2016-08-24 | 河海大学 | Laboratorial adjustable upstream and downstream water level difference fixing system |
| CN108827591A (en) * | 2018-04-02 | 2018-11-16 | 北京大学 | A kind of gravity type circulating water tunnel for the measurement of underwater complex surface drag reduction |
-
1996
- 1996-12-26 JP JP8347071A patent/JPH10185635A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003035575A (en) * | 2001-07-19 | 2003-02-07 | Dmw Corp | Pump flow measurement method and pump flow measurement device |
| WO2008095234A1 (en) * | 2007-02-06 | 2008-08-14 | Samaran International Pty Ltd | Flow sensor |
| CN105892506A (en) * | 2016-05-13 | 2016-08-24 | 河海大学 | Laboratorial adjustable upstream and downstream water level difference fixing system |
| CN108827591A (en) * | 2018-04-02 | 2018-11-16 | 北京大学 | A kind of gravity type circulating water tunnel for the measurement of underwater complex surface drag reduction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20040302 |