JPH0361131B2 - - Google Patents
Info
- Publication number
- JPH0361131B2 JPH0361131B2 JP58012009A JP1200983A JPH0361131B2 JP H0361131 B2 JPH0361131 B2 JP H0361131B2 JP 58012009 A JP58012009 A JP 58012009A JP 1200983 A JP1200983 A JP 1200983A JP H0361131 B2 JPH0361131 B2 JP H0361131B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- measured
- flow
- flow rate
- flowmeter
- 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.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 75
- 238000010998 test method Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Description
【発明の詳細な説明】
イ 産業上の利用分野
本発明は電磁流量計や他方式（水道メータ、超
音波流量計、カルマン渦型、差圧式等）の流量計
の簡易な通水試験の方法に関するものである。[Detailed description of the invention] A. Field of industrial application The present invention provides a method for simple water flow testing of electromagnetic flowmeters and other types of flowmeters (water meters, ultrasonic flowmeters, Karman vortex type, differential pressure type, etc.). It is related to.
ロ 従来技術 従来の流量計の通水試験設備を第１図に示す。B. Conventional technology Figure 1 shows a conventional water flow test facility for flowmeters.
地面GLに水路を兼ねた水槽１を設けて通水試
験に用いる水を所定の水面WLまで貯める。次
で、水槽１内の水をポンプ２で吸出してバルブ３
を経てｎ個の被測定流量計４1〜oを通し、バルブ
５を通過させてダイバータ６に流す。ダイバータ
６は一定の計測時間、水をタンク７に切換えて計
測時間内にタンクに貯まつた水の量と被測定流量
計４1〜oの指示を比較してｎ個の被測定流量計４1
〜ｏの流量特性を知る。計測時間以外はダイバータ
６は水を水槽１に返す。バルブ３，５はｎ個の被
測定流量計４1〜oの流量を制御するのに用いると
ともに取換時にも使用する。バルブ８はタンク７
内の水を水槽に排出するのに用いる。 A water tank 1 that also serves as a waterway is provided on the ground GL, and water used for the water flow test is stored up to a predetermined water surface WL. Next, the water in tank 1 is sucked out by pump 2 and valve 3
The flow passes through n measured flowmeters 4 1 to o , passes through a valve 5, and flows into a diverter 6. The diverter 6 switches the water to the tank 7 for a certain measurement time, compares the amount of water stored in the tank within the measurement time with the indications of the flowmeters 4 to be measured 4 , and calculates the flowmeters 4 to be measured. 1
~ Know the flow rate characteristics of o. The diverter 6 returns water to the aquarium 1 at times other than the measurement time. The valves 3 and 5 are used to control the flow rates of the n measured flowmeters 41 to 4o , and are also used when replacing them. Valve 8 is tank 7
It is used to drain the water inside into the aquarium.
このような通水試験の方法においては上記のご
とく大きな設備を有しその金額は比較的小口径例
えば10mm〜200mm程度の口径の流量計を試験する
設備においても数百万円から数千万円となる欠点
がある。又、通水試験を行なうには、ｎ個の被測
定流量計４1〜oを配管取付したり、取外したりし
なければならないので入手と工数を要す欠点もあ
る。このような設備は当然固定式で移動できない
ので流量計が取付いている現地でこの方法による
通水試験を行なおうとしても不可能である。 This type of water flow testing method requires large equipment as mentioned above, and the cost is from several million yen to tens of millions of yen even for equipment that tests relatively small diameter flowmeters, for example, 10 mm to 200 mm. There is a drawback. In addition, in order to conduct a water flow test, it is necessary to install and remove the n number of flowmeters to be measured 41 to 4o on piping, which has the drawback of requiring acquisition and man-hours. Naturally, such equipment is fixed and cannot be moved, so it would be impossible to conduct a water flow test using this method at the site where the flow meter is installed.
ハ 発明の目的
本発明は前記に鑑み、通水試験設備が安価でか
つ流量計が取付いている現地へ試験設備を容易に
運んで試験できる通水試験方法を提案することを
目的とするものである。C. Purpose of the Invention In view of the above, an object of the present invention is to propose a water flow test method in which the water flow test equipment is inexpensive and can be easily transported to a site where a flow meter is installed for testing. be.
ニ 発明の構成
本発明は前記の目的を達成するために、貯水箱
９に水を貯え、該水中に被測定流量計４の通水パ
イプ４ｐを没入させると共に、一端を水道の蛇口
１０に連結したホース１１の他端に設けたノズル
１２を前記通水パイプ４ｐに対して一定の位置に
おいて、水道の蛇口１０からの水をホース１１を
通してノズル１２より被測定流量計４の通水パイ
プ４ｐに吹込み、水道に付設されている水道メー
タの流量と、被測定流量計４の表示流量を検知
し、これらの流量と、被測定流量計４と同じ種
類、口径の予め校正された別の流量計を貯水箱９
で計測した流量計数とから被測定流量計４の流量
特性を測定するようにしたことを特徴とするもの
である。D. Structure of the Invention In order to achieve the above object, the present invention stores water in a water storage box 9, immerses the water pipe 4p of the flow meter 4 to be measured in the water, and connects one end to a water faucet 10. The nozzle 12 provided at the other end of the hose 11 is placed at a certain position relative to the water pipe 4p, and water from the faucet 10 is passed through the hose 11 through the nozzle 12 to the water pipe 4p of the flow meter 4 to be measured. The flow rate of the water meter attached to the water supply and the displayed flow rate of the flow meter 4 to be measured are detected, and these flow rates and another flow rate of the same type and diameter as the flow meter 4 to be measured are calibrated in advance. Water storage box 9
This is characterized in that the flow rate characteristics of the flow meter 4 to be measured are measured from the flow rate count measured by the flow rate meter 4.
ホ 実施例 本発明の通水試験の基本を第２図に示す。Example The basics of the water flow test of the present invention are shown in FIG.
被測定流量計４が充分に入る貯水箱９を用意し
て水を第２図の水面WLまで入れる。箱９の大き
さは流量計４を入れた時に箱９の四周の壁面と流
量計４との間に水が流動する隙間ができる大きさ
があればよい。又水面WLは流量計４の流量計測
部が水面WL下になればよい。例えば電磁流量計
であると流量計４の流量検出部４Ｆが水面WLよ
り下にあれば変換器４ｅは水面WL上にあつても
よい。この状態で流量計４に電源を入れて出力を
見れば流量零の時すなわち零点を確認できる。次
に流量計４を持つて左右に動かすと水は静止して
いるため、流量計４にとつては水が流れているの
と同じ状態になるので流量信号が出力されて流量
計４の動作を確認する事ができる。 Prepare a water storage box 9 that can accommodate the flow meter 4 to be measured, and fill it with water up to the water level WL shown in Figure 2. The size of the box 9 should be such that when the flow meter 4 is inserted, there is a gap between the four circumferential walls of the box 9 and the flow meter 4 through which water flows. Also, the water surface WL only needs to be such that the flow rate measurement part of the flow meter 4 is below the water surface WL. For example, in the case of an electromagnetic flowmeter, if the flow rate detection section 4F of the flowmeter 4 is located below the water surface WL, the converter 4e may be located above the water surface WL. In this state, by turning on the power to the flow meter 4 and looking at the output, it is possible to confirm when the flow rate is zero, that is, the zero point. Next, when you hold the flow meter 4 and move it from side to side, the water is stationary, so the flow meter 4 is in the same state as water flowing, so a flow rate signal is output and the flow meter 4 operates. You can check.
しかしながらこの方法においては、箱９の大き
さが限られているので流量計４を動かす量が限ら
れ短時間しか流量信号が出ないし、流量信号と流
量との関係をつかめず流量計の精度のチエツクは
できない。 However, in this method, since the size of the box 9 is limited, the amount by which the flowmeter 4 can be moved is limited and a flow rate signal is only output for a short period of time, and the relationship between the flow rate signal and the flow rate cannot be grasped, so the accuracy of the flow meter is affected. Cannot be checked.
以上のことから本発明による通水試験の方法は
比較的長時間少なくとも30秒以上の連続で流量精
度も得られる通水試験を行なえるようにしたもの
である。 In view of the above, the water flow test method according to the present invention is designed to allow a water flow test that can be performed continuously for a relatively long time, at least 30 seconds or more, and also provides flow rate accuracy.
第３図に本発明の実施例を示す。 FIG. 3 shows an embodiment of the present invention.
箱９に、これを満たすような水面WLとなるよ
うに水を入れる。次で被測定流量計４の流量検出
部４Ｆを水面WLより下に入れる。なお第３図に
おいては流量検出部４Ｆの流路となる通水パイプ
４Ｐのみ断面で示している。次で、水道の蛇口１
０からの水をホース１１を通してその先端のノズ
ル１２より流量計４のパイプ４Ｐに吹込む。これ
により水道水は箱９内の水を巻き込みながら通水
パイプ４Ｐ内を流れ流量計４は流量信号を出力す
る。このとき、水道水の流量は水道には必らず付
設されている水道メータを見ることにより知るこ
とができる。又、ノズル効果によりノズル１２が
巻きこむ箱９内の水はノズル４の形状、パイプ４
Ｐの形状、パイプ４Ｐに対するノズル１２の位置
を一定とすれば、あらかじめ第１図の方法等で校
正された流量計を用いて上記方法と同一の条件で
通水してノズル１２から噴出した流量とその流量
計のパイプに流れる流量の関係を定量的に知る事
ができる。この関係を流量係数とすると同一の箱
９とノズル１２に対して異なつた種類、口径の流
量計の流量係数をあらかじめ工場内で求めておい
て、被測定流量計４を第３図の方法により、工場
又は現地で通水してノズル１２に流れる流量と被
測定流量計４の出力をその種類、口径の流量係数
を適用して比較すれば被測定流量計の流量特性を
知る事ができる。なお、ノズル１２から箱９内に
流入した水は同量の水が箱９からあふれる事によ
り水面WLは一定に保たれ任意の時間通水試験が
できる。 Fill box 9 with water so that the water surface WL satisfies this. Next, the flow rate detection section 4F of the flow meter 4 to be measured is placed below the water surface WL. In addition, in FIG. 3, only the water passage pipe 4P serving as the flow path of the flow rate detection section 4F is shown in cross section. Next, water faucet 1
0 is blown into the pipe 4P of the flowmeter 4 through the hose 11 and from the nozzle 12 at its tip. As a result, the tap water flows through the water pipe 4P while involving the water in the box 9, and the flow meter 4 outputs a flow rate signal. At this time, the flow rate of tap water can be known by looking at the water meter that is always attached to the tap water. Also, due to the nozzle effect, the water in the box 9 that the nozzle 12 entrains is caused by the shape of the nozzle 4 and the pipe 4.
If the shape of P and the position of the nozzle 12 with respect to the pipe 4P are constant, the flow rate ejected from the nozzle 12 when water is passed under the same conditions as the above method using a flow meter calibrated in advance by the method shown in Fig. 1, etc. You can quantitatively know the relationship between the flow rate and the flow rate flowing through the pipe of the flowmeter. If this relationship is taken as a flow coefficient, the flow coefficients of flowmeters of different types and diameters for the same box 9 and nozzle 12 are determined in advance in the factory, and the flowmeter 4 to be measured is measured using the method shown in Fig. 3. By comparing the flow rate flowing into the nozzle 12 in a factory or on-site with the output of the flow meter 4 to be measured by applying the flow rate coefficient of the type and diameter, the flow rate characteristics of the flow meter to be measured can be known. Note that the same amount of water flowing into the box 9 from the nozzle 12 overflows from the box 9, so that the water surface WL is kept constant and a water flow test can be performed for any time.
ヘ 発明の効果
以上のように本発明の方法によれば、貯水箱９
とノズル１２及びホース１１があれば被測定流量
計の性能を知る事ができるので、流量計の製造工
場にあつては通水設備が低コストで、かつ配管等
の作業なしで通水試験ができる。更に、本発明の
方法は、搬送可能な貯水箱と搬送可能なノズルと
ホース及び現地に設備されている水道を用いて実
施できるので、流量計が設置されている現地で流
量計の性能チエツクができる。更に、計測に用い
る貯水箱が小さくてよいので経済的であるなど、
流量計の通水試験方法として極めて有効なもので
ある。F. Effect of the Invention As described above, according to the method of the present invention, the water storage box 9
If you have the nozzle 12 and hose 11, you can know the performance of the flowmeter being measured. Therefore, in the case of a flowmeter manufacturing factory, water flow equipment can be installed at low cost, and water flow tests can be performed without any work such as piping. can. Furthermore, the method of the present invention can be carried out using a transportable water storage box, transportable nozzles and hoses, and locally installed water supply, so the performance of the flowmeter can be checked at the site where the flowmeter is installed. can. Furthermore, it is economical because the water storage box used for measurement only needs to be small.
This method is extremely effective as a water flow test method for flowmeters.
第１図は従来方法を示す側面図、第２図は本発
明方法を説明する図、第３図は本発明の実施例を
示す一部を縦断した側面図である。
４……被測定流量計、４ｅ……変換器、４Ｆ…
…流量検出部、４Ｐ……通水パイプ、９……貯水
箱、１０……水道の蛇口、１１……ホース、１２
……ノズル。
FIG. 1 is a side view showing the conventional method, FIG. 2 is a view explaining the method of the present invention, and FIG. 3 is a side view, partially cut away, showing an embodiment of the present invention. 4...Flowmeter to be measured, 4e...Converter, 4F...
...Flow rate detection unit, 4P...Water pipe, 9...Water storage box, 10...Water faucet, 11...Hose, 12
……nozzle.
Claims (1)
４の通水パイプ４ｐを没入させると共に、一端を
水道の蛇口１０に連結したホース１１の他端に設
けたノズル１２を前記通水パイプ４ｐに対して一
定の位置において、水道の蛇口１０からの水をホ
ース１１を通してノズル１２より被測定流量計４
の通水パイプ４ｐに吹込み、水道に付設されてい
る水道メータの流量と、被測定流量計４の表示流
量を検知し、これらの流量と、被測定流量計４と
同じ種類、口径の予め校正された別の流量計を貯
水箱９で計測した流量計数とから被測定流量計４
の流量特性を測定するようにしたことを特徴とす
る流量計の通水試験方法。1. Store water in the water storage box 9, immerse the water pipe 4p of the flow meter 4 to be measured in the water, and pass the water through the nozzle 12 provided at the other end of the hose 11 whose one end is connected to the water faucet 10. At a certain position relative to the pipe 4p, water from the faucet 10 is passed through the hose 11 through the nozzle 12 to the flow meter 4 to be measured.
The flow rate of the water meter attached to the water supply and the displayed flow rate of the flowmeter to be measured 4 are detected, and these flow rates are compared with the flow rate of the flowmeter of the same type and diameter as the flowmeter to be measured 4. The measured flowmeter 4 is calculated from another calibrated flowmeter and the flow rate measured in the water storage box 9.
A water flow test method for a flowmeter, characterized in that the flow rate characteristics of the flowmeter are measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58012009A JPS59137825A (en) | 1983-01-27 | 1983-01-27 | Water flow testing method for flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58012009A JPS59137825A (en) | 1983-01-27 | 1983-01-27 | Water flow testing method for flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59137825A JPS59137825A (en) | 1984-08-08 |
| JPH0361131B2 true JPH0361131B2 (en) | 1991-09-18 |
Family
ID=11793584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58012009A Granted JPS59137825A (en) | 1983-01-27 | 1983-01-27 | Water flow testing method for flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59137825A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5426831U (en) * | 1977-07-26 | 1979-02-21 | ||
| JPS5426831A (en) * | 1977-08-01 | 1979-02-28 | Chuo Rika Kougiyou Kk | Emulsion type heat sensitive adhesive |
| JPS54128777A (en) * | 1978-03-30 | 1979-10-05 | Agency Of Ind Science & Technol | Calibrating device for flow speed meter of hot fluid |
-
1983
- 1983-01-27 JP JP58012009A patent/JPS59137825A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5426831U (en) * | 1977-07-26 | 1979-02-21 | ||
| JPS5426831A (en) * | 1977-08-01 | 1979-02-28 | Chuo Rika Kougiyou Kk | Emulsion type heat sensitive adhesive |
| JPS54128777A (en) * | 1978-03-30 | 1979-10-05 | Agency Of Ind Science & Technol | Calibrating device for flow speed meter of hot fluid |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59137825A (en) | 1984-08-08 |
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