JP3470125B2 - Divertor for liquid flow rate calibration device - Google Patents
Divertor for liquid flow rate calibration deviceInfo
- Publication number
- JP3470125B2 JP3470125B2 JP2000238752A JP2000238752A JP3470125B2 JP 3470125 B2 JP3470125 B2 JP 3470125B2 JP 2000238752 A JP2000238752 A JP 2000238752A JP 2000238752 A JP2000238752 A JP 2000238752A JP 3470125 B2 JP3470125 B2 JP 3470125B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- switching
- weighing tank
- inflow
- flow
- 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
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- Measuring Volume Flow (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、液体の流量を計測する
流量計を高精度で校正する液体流量校正装置に使用する
ダイバータに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diverter used in a liquid flow rate calibration device for calibrating a flow meter for measuring the flow rate of a liquid with high accuracy.
【０００２】[0002]
【従来の技術】液体の流量を計測する流量計を高精度で
校正するには、図１に示すように、地下タンクから吸入
した液体をオーバーフロータンクを経由して流量計試験
管路に導くようにして試験管路において安定な流れを発
生させ、該試験管路に設けた流量計を通過する際、流量
計により計測された液体を秤量タンク上部に設けたダイ
バータにより秤量タンク側に高速で切り換えて秤量タン
ク内に流入させる。所定時間経過後、ダイバータにより
流れを地下タンク側に切り換えて、秤量タンクへの液体
の流入を停止させ、秤量タンクへ流入した液体の流入量
と流入時間から単位時間あたりの液体の流量を求める方
法が一般的であった。2. Description of the Related Art In order to calibrate a flow meter for measuring a flow rate of a liquid with high accuracy, as shown in FIG. 1, a liquid sucked from an underground tank is guided to a flow meter test pipe via an overflow tank. Then, when a stable flow is generated in the test pipeline and when passing through the flow meter provided in the test pipeline, the liquid measured by the flow meter is switched to the weighing tank side at high speed by the diverter provided at the top of the weighing tank. Flow into the weighing tank. After a lapse of a predetermined time, the flow is switched to the underground tank side by the diverter to stop the inflow of the liquid into the weighing tank, and the liquid flow rate per unit time is calculated from the inflow amount of the liquid flowing into the weighing tank and the inflow time. Was common.
【０００３】
従来のダイバータは、たとえば通過する液体の量が３
０００ｍ３／ｈの場合、回転羽根２の高さが２ｍ、幅が
１．５ｍと大きく、また、高速で水流の方向を転換させ
る必要があるため、図２に示すように１枚の回転羽根２
を油圧で回転させていた。また、測定誤差を小さくする
ため、秤量タンクへの流入開始時と流入停止時の過渡的
な流入状態を対称にする目的で、ノズル１で流れを絞っ
て流入する水流の流速分布を対称にする必要があった。
こ
のダイバータを用いて流れの切り換えを行うには、地下
タンクから秤量タンクへ切り換える場合は回転羽根２を
反時計方向に回転させ、反対に秤量タンクから地下タン
クへ切り換える場合は回転羽根２を時計方向に回転させ
る。[0003]
In the conventional diverter, for example, the amount of liquid passing through is 3
In the case of 000 m 3 / h, the rotating blade 2 has a large height of 2 m and a width of 1.5 m, and since it is necessary to change the direction of the water flow at a high speed, one rotating blade is used as shown in FIG. Two
Was being hydraulically rotated. In order to reduce the measurement error, the flow velocity distribution of the inflowing water flow is made symmetrical by narrowing the flow at the nozzle 1 for the purpose of making the transitional inflow state at the start and stop of the inflow into the weighing tank symmetrical. There was a need.
In order to switch the flow using this diverter, the rotary vane 2 is rotated counterclockwise when switching from the underground tank to the weighing tank, while the rotary vane 2 is rotated clockwise when switching from the weighing tank to the underground tank. Rotate to.
【０００４】
この際、ノズル１から出る水流の流速分布のわずかな
非対称や回転羽根２の回転の非対称が原因で切り換え時
の秤量タンクへの流入量は図４に示すように非対称なも
のになり、それが誤差要因となっていた。
すなわち、図４は、秤量タ
ンクへ流入する液体の流入状態を経時的に示したもの
で、まず、ａ点で回転羽根２が反時計方向に回転を始め
たとすると、該回転羽根２の動きはｂ点でセンサー等で
検知され、ｃ点で地下タンク側から秤量タンク側へ回転
羽根２の切り換えが完了する。所定時間液体が秤量タン
クへ流入した後、ｄ点で回転羽根２を時計方向に回転さ
せ始め、ｅ点でセンサー等が回転羽根２の動きを検知
し、ｆ点で秤量タンク側から地下タンク側への回転羽根
２の切り換えが完了する。[0004]
At this time, due to the slight asymmetry of the flow velocity distribution of the water flow coming out of the nozzle 1 and the asymmetry of the rotation of the rotary blades 2, the inflow amount into the weighing tank at the time of switching becomes asymmetric as shown in FIG. It was an error factor.
That is, FIG. 4 shows the inflow state of the liquid flowing into the weighing tank with time. First, assuming that the rotating blade 2 starts rotating counterclockwise at point a, the movement of the rotating blade 2 is as follows. It is detected by a sensor or the like at the point b, and the switching of the rotary blades 2 from the underground tank side to the weighing tank side is completed at the point c. After the liquid has flowed into the weighing tank for a predetermined time, the rotating blade 2 starts rotating clockwise at the point d, the sensor or the like detects the movement of the rotating blade 2 at the point e, and from the weighing tank side to the underground tank side at the point f. The switching of the rotary blade 2 to is completed.
【０００５】したがって、この間の秤量タンクへの液体
の流入量を測定して、該流入量を時間ｂ−ｅで除せば定
常状態時の単位時間あたりの流入量ｑが得られることに
なる。ところが、実際には図４で示すとおり秤量タンク
への流入開始と流入停止の過渡的な流入状態が非対称と
なっているため、上記の定常状態時の単位時間あたりの
流入量とは異なった量が秤量タンクへ流入していること
になり、これが誤差となっていた。なお従来のダイバー
タの他の例として、図３に示すものがある。これは、１
枚の羽根からなる転流羽根２を水平方向に往復動自在に
支持させ、図示しない適宜の駆動装置で左右に移動させ
て液体の流入を切り換えるものであるが、秤量タンクへ
の液体の流入状態は図２で示した回転羽根のものと同様
である。Therefore, by measuring the inflow amount of the liquid into the weighing tank during this period and dividing the inflow amount by the time be, the inflow amount q per unit time in the steady state can be obtained. However, in actuality, as shown in FIG. 4, the transient inflow state of inflow start and inflow stop into the weighing tank is asymmetrical, so the inflow rate differs from the inflow rate per unit time in the steady state. Was flowing into the weighing tank, which was an error. Another example of the conventional diverter is shown in FIG. This is 1
The commutation blade 2 composed of a single blade is supported so as to be reciprocally movable in the horizontal direction, and is switched left and right by an appropriate drive device (not shown) to switch the liquid inflow. Is similar to that of the rotary blade shown in FIG.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、ノズルから
出る水流の流速分布が非対称でも、また、回転羽根の回
転が非対称または転流羽根の左右への水平方向の往復動
が非対称であっても、秤量タンクへの流入開始と流入停
止の過渡的な流入状態を対称にすることにより誤差のな
い液体流量校正装置用ダイバータを提供することを目的
としている。SUMMARY OF THE INVENTION According to the present invention, even if the flow velocity distribution of the water flow coming out of the nozzle is asymmetric, the rotation of the rotary vanes is asymmetric, or the horizontal reciprocating motion of the commutating vanes is asymmetric. Another object of the present invention is to provide a diverter for a liquid flow rate calibration device which has no error by making the transitional inflow state of start and stop of inflow into the weighing tank symmetrical.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記の課題を
解決することを目的として、秤量タンクへの液体の流入
を切り換えるようにした切り換え装置において、一定の
間隔をもって液体の流れの方向に配置された２枚の羽根
からなる切り換え羽根を切り換え自在に設け、秤量タン
クへの液体の流入開始及び流入停止を切り換え羽根の一
方向への一連の動作の中で行うようにしたことを特徴と
する。また、本発明は、秤量タンクへの液体の流入を切
り換えるようにした切り換え装置において、一定の間隔
をもって液体の流れの方向に配置された２枚の羽根から
なる切り換え羽根を水平方向に移動自在に設け、秤量タ
ンクへの液体の流入開始及び流入停止を切り換え羽根の
一方向への一連の動作の中で行うようにしたことを特徴
とする。また、本発明は、秤量タンクへの液体の流入を
切り換えるようにした切り換え装置において、一定の間
隔をもって液体の流れの方向に配置された２枚の羽根か
らなる切り換え羽根を回転自在に設け、秤量タンクへの
液体の流入開始及び流入停止を切り換え羽根の一方向へ
の一連の動作の中で行うようにしたことを特徴とする。The present invention SUMMARY OF], for the purpose of solving the above problems, in a switching apparatus that switches the flow of liquid into the weighing tank, the constant
A switching blade composed of two blades arranged at intervals in the direction of liquid flow is provided to be switchable, and start and stop of inflow of liquid into the weighing tank are switched in a series of operations in one direction of the blade. It is characterized in that it is done. The present invention also provides a switching apparatus that switches the flow of liquid into the weighing tank, regular intervals
A switching blade composed of two blades arranged in the direction of the liquid flow is provided movably in the horizontal direction, and the start and stop of the inflow of the liquid to the weighing tank are switched and a series of operations in one direction of the blade are performed. It is characterized in that it was done in. The present invention also provides a switching apparatus that switches the flow of liquid into the weighing tank, during a predetermined
A switching vane composed of two blades arranged in the direction of liquid flow with a gap is rotatably provided to start and stop the inflow of liquid into the weighing tank in a series of operations in one direction of the vane. It is characterized in that it is done.
【０００８】[0008]
【発明の実施の形態】以下、図面を参照して本発明の実
施例を説明する。図５は、地下タンクへ流入していた液
体を秤量タンクへ流入するように切り換え羽根を切り換
えた状態を示している。 図示しない流量計を通
過した液体はノズル１から噴出され、切り換え羽根２に
よって地下タンクあるいは秤量タンクへと切り換えられ
る。切換え羽根２は、図５に示すように一定の間隔をも
って配置された液体の流れの方向に流線形をした２枚の
羽根からなり、液体路４内を水平方向に移動できるよう
に支持されている。該切り換え羽根２は左端位置、中央
位置あるいは右端位置の３つのポジションを選択的にと
れるように適宜の駆動装置で左右に駆動される。切り換
え羽根２が左端位置及び右端位置にある場合は液体は地
下タンクへ流入し、中央位置にある場合は液体は秤量タ
ンクへ流入するようになっている。切り換え羽根２の下
方にはフレキシブル管３等を接続し、切り換え羽根２の
移動に追従して液体を秤量タンクへ導くようになってい
る。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows a state in which the switching blades are switched so that the liquid flowing into the underground tank flows into the weighing tank. The liquid that has passed through a flow meter (not shown) is ejected from the nozzle 1 and is switched by the switching blade 2 to an underground tank or a weighing tank. As shown in FIG. 5, the switching blade 2 is composed of two blades arranged at a constant interval and having a streamline shape in the liquid flow direction, and is supported so as to be movable in the liquid path 4 in the horizontal direction. There is. The switching blade 2 is driven to the left and right by an appropriate driving device so that it can selectively take three positions of a left end position, a center position and a right end position. The liquid flows into the underground tank when the switching vane 2 is at the left end position and the right end position, and the liquid flows into the weighing tank when it is at the central position. A flexible pipe 3 and the like are connected below the switching blade 2 so that the liquid is guided to the weighing tank by following the movement of the switching blade 2.
【０００９】
流量計を通過した液体の量を計測するには、まず切り
換え羽根２を液体を地下タンクへ流入させていた左端位
置の状態から中央位置に平行移動させる。切り換え羽根
２が中央位置になると、液体は地下タンクから秤量タン
クへ流入する。所定時間秤量タンクへの液体の流入がな
された後、切り換え羽根２をさらに右方に平行移動させ
て右端位置で停止させる。すると、液体の流入は秤量タ
ンクから地下タンクへと切り替わる。この間の秤量タン
クへの液体の流入量を測定すれば、流量計を通過した液
体の量を計測することができる。また、切り換え羽根２
が右端位置にある状態から秤量タンクへの液体の流入量
を計測するには、まず、切り換え羽根２を中央位置に切
り換えて秤量タンクへ液体を流入させ、所定時間後さら
に切り換え羽根を左端位置に切り換えて秤量タンクへの
液体の流入を停止させれば良い。[0009]
In order to measure the amount of liquid that has passed through the flow meter, first, the switching blade 2 is moved in parallel from the state of the left end position where the liquid was flowing into the underground tank to the central position. When the switching vanes 2 are in the central position, the liquid flows from the underground tank into the weighing tank. After the liquid has flowed into the weighing tank for a predetermined time, the switching blade 2 is further translated rightward and stopped at the right end position. Then, the inflow of liquid switches from the weighing tank to the underground tank. By measuring the amount of liquid flowing into the weighing tank during this period, the amount of liquid that has passed through the flowmeter can be measured. Also, the switching blade 2
In order to measure the inflow amount of the liquid into the weighing tank from the state where is at the right end position, first, the switching vane 2 is switched to the central position to allow the liquid to flow into the weighing tank, and after a predetermined time, the switching vane is further moved to the left end position. The liquid may be switched to stop the flow of the liquid into the weighing tank.
【００１０】図７は、秤量タンクへ流入する液体の流入
状態を経時的に示したもので、まず、ａ点で切り換え羽
根２が左端位置から中央位置に平行移動を始めたとする
と、該切り換え羽根２の動きはｂ点でセンサー等で検知
され、ｃ点で地下タンク側から秤量タンク側へ切り換え
羽根２の切り換えが完了する。所定時間液体が秤量タン
クへ流入した後、ｄ点で切り換え羽根２が中央位置から
右端位置に移動を始め、ｅ点でセンサー等が切り換え羽
根２の動きを検知し、ｆ点で秤量タンク側から地下タン
ク側への切り換え羽根２の切り換えが完了する。FIG. 7 shows the inflow state of the liquid flowing into the weighing tank with time. First, if the switching blade 2 starts to move in parallel from the left end position to the central position at point a, the switching blade will be described. The movement of 2 is detected by a sensor or the like at point b, and the switching of blade 2 is completed from the underground tank side to the weighing tank side at point c. After the liquid has flowed into the weighing tank for a predetermined time, the switching blade 2 starts moving from the central position to the right end position at point d, a sensor or the like detects the movement of the switching blade 2 at point e, and from the weighing tank side at point f. The switching of the switching blade 2 to the underground tank side is completed.
【００１１】したがって、この間の秤量タンクへの液体
の流入量を測定して、該流入量を時間ｂ−ｅで除せば定
常状態時の単位時間あたりの流入量ｑが得られることに
なる。図７から、秤量タンクへの流入開始と流入停止の
過渡的な流入状態が対称になっていることがわかる。す
なわち、点ａｂ間の斜線で示す部分と点ｄｅ間の斜線で
示す部分、および点ｂｃ間の斜線で示す部分と点ｅｆ間
の斜線で示す部分とがそれぞれ同じ形状を示しており、
全体として秤量タンクへの流入開始と流入停止の過渡的
な流入状態が対称になっている。これは、切り換え羽根
２の切り換えが一方向への一連の動作の中で行われるか
ら、ノズル１から出る水流の流速分布が非対称でも切り
換え羽根２の回転が非対称でもこれらの要因に左右され
ないことに起因している。Therefore, by measuring the inflow amount of the liquid into the weighing tank during this period and dividing the inflow amount by the time be, the inflow amount q per unit time in the steady state can be obtained. From FIG. 7, it can be seen that the transitional inflow state of the inflow start and inflow stop into the weighing tank is symmetrical. That is, the shaded portion between the points ab and the shaded portion between the points de, and the shaded portion between the points bc and the shaded portion between the points ef show the same shape,
As a whole, the transitional inflow state of inflow start and inflow stop into the weighing tank is symmetrical. This is because switching of the switching vanes 2 is performed in a series of operations in one direction, so that whether the flow velocity distribution of the water flow exiting the nozzle 1 is asymmetrical or the rotation of the switching vanes 2 is asymmetrical is not affected by these factors. It is due.
【００１２】このため、ノズル１から出る水流の速度分
布が非対称であっても、あるいは切り換え羽根の左右へ
の回転又は往復動が非対称であっても、切り換え時の秤
量タンクへの流入量に影響を及ぼすことがなく、単位時
間あたりの流入量を正確に測定することが可能となる。
図６に示した本発明に係る他の実施例は、２枚の羽根か
らなる切り換え羽根２を回転中心５を中心に回動自在に
支持し、切り換え羽根２が左端位置、中央位置あるいは
右端位置の３つのポジションを選択的にとれるように適
宜の駆動装置で回動駆動するものであるが、秤量タンク
への液体の流入状態は図５で示した切り換え羽根のもの
と同様、流入開始と流入停止の過渡的な流入状態が対称
になっている。Therefore, even if the velocity distribution of the water flow coming out of the nozzle 1 is asymmetric, or the left and right rotation or reciprocal movement of the switching blade is asymmetric, the amount of inflow into the weighing tank at the time of switching is affected. It is possible to accurately measure the inflow amount per unit time without affecting.
In another embodiment according to the present invention shown in FIG. 6, a switching blade 2 composed of two blades is rotatably supported around a rotation center 5, and the switching blade 2 is at a left end position, a center position or a right end position. The rotational position is driven by an appropriate drive device so that the three positions can be selectively taken. The inflow state of the liquid into the weighing tank is the same as that of the switching blade shown in FIG. The transitional inflow state of the stop is symmetrical.
【００１３】[0013]
【発明の効果】本発明に係るダイバータにおいては、２
枚の羽根からなる切り換え羽根を設け、秤量タンクへの
液体の流入開始及び流入停止を該切り換え羽根の一方向
への一連の動作の中で行うようにしたことにより、ノズ
ルから出る水流の速度分布が非対称であっても、あるい
は切り換え羽根の左右への回転又は往復動が非対称であ
っても、切り換え時の秤量タンクへの流入量に影響を及
ぼすことがなく、単位時間あたりの流入量を正確に測定
することが可能となる。In the diverter according to the present invention, 2
By providing a switching vane consisting of a single blade and starting and stopping the inflow of the liquid into the weighing tank in a series of operations in one direction of the switching vane, the velocity distribution of the water flow exiting the nozzle Even if the switch is asymmetrical, or the left and right rotation or reciprocating motion of the switching blade is asymmetrical, it does not affect the inflow into the weighing tank at the time of switching, and the inflow per unit time is accurate. It becomes possible to measure.
【図１】液体流量校正装置の全体を示す全体概略図であ
る。FIG. 1 is an overall schematic view showing an entire liquid flow rate calibration device.
【図２】従来の液体流量校正装置に使用するダイバータ
の一例を示した要部断面図である。FIG. 2 is a cross-sectional view of essential parts showing an example of a diverter used in a conventional liquid flow rate calibration device.
【図３】従来の液体流量校正装置に使用するダイバータ
の他の例を示した要部断面図であるFIG. 3 is a cross-sectional view of essential parts showing another example of the diverter used in the conventional liquid flow rate calibration device.
【図４】図２及び図３に示した従来のダイバータを用い
た場合の秤量タンクへの液体の流入状態を示した説明図
である。FIG. 4 is an explanatory diagram showing a flow state of a liquid into a weighing tank when the conventional diverter shown in FIGS. 2 and 3 is used.
【図５】本発明の第１の実施例に係るダイバータの要部
断面図である。FIG. 5 is a cross-sectional view of essential parts of the diverter according to the first embodiment of the present invention.
【図６】本発明の第２の実施例に係るダイバータの要部
断面図である。FIG. 6 is a cross-sectional view of essential parts of a diverter according to a second embodiment of the present invention.
【図７】図５及び図６に示した本発明の実施例のダイバ
ータを用いた場合の秤量タンクへの液体の流入状態を示
した説明図である。FIG. 7 is an explanatory diagram showing a flow state of the liquid into the weighing tank when the diverter of the embodiment of the present invention shown in FIGS. 5 and 6 is used.
１ ノズル ２ 切り換え羽根 ３ フレキシブル管 ４ 流体路 ５ 切り換え羽根の回転中心 1 nozzle 2 switching blades 3 flexible tubes 4 fluid path 5 Rotation center of switching blade
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭51−2451（ＪＰ，Ａ) 実開 昭64−29571（ＪＰ，Ｕ) 嶋田隆司，石油大流量校正設備，ＡＩ ＳＴ ｔｏｄａｙ，日本，2002年 ２月 ７日 (58)調査した分野(Int.Cl.7，ＤＢ名) G01F 25/00 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-51-2451 (JP, A) SAI-KAI 64-29571 (JP, U) SHIMADA Takashi, Petroleum Large Flow Calibration Equipment, AIST today, 2002 February 7, (58) Fields surveyed (Int.Cl. 7 , DB name) G01F 25/00
Claims (3)
ようにした切り換え装置において、一定の間隔をもって
液体の流れの方向に配置された２枚の羽根からなる切り
換え羽根を切り換え自在に設け、秤量タンクへの液体の
流入開始及び流入停止を切り換え羽根の一方向への一連
の動作の中で行うようにしたことを特徴とする液体流量
校正装置用ダイバータ。1. A switching device adapted to switch the flow of liquid into a weighing tank at regular intervals.
A switching blade composed of two blades arranged in the direction of liquid flow is provided so as to be switchable, and the start and stop of the inflow of liquid into the weighing tank are performed in a series of operations in one direction of the switching blade. A diverter for a liquid flow rate calibration device characterized in that
うにした切り換え装置において、一定の間隔をもって液
体の流れの方向に配置された２枚の羽根からなる切り換
え羽根を水平方向に移動自在に設け、秤量タンクへの液
体の流入開始及び流入停止を切り換え羽根の一方向への
一連の動作の中で行うようにしたことを特徴とする液体
流量校正装置用ダイバータ。2. A switching device for switching the flow of liquid into a weighing tank, wherein the liquid is kept at a constant interval.
A switching blade consisting of two blades arranged in the direction of body flow is provided movably in the horizontal direction, and the start and stop of inflow of liquid into the weighing tank are switched in a series of operations in one direction. A diverter for a liquid flow rate calibration device, characterized in that
うにした切り換え装置において、一定の間隔をもって液
体の流れの方向に配置された２枚の羽根からなる切り換
え羽根を回転自在に設け、秤量タンクへの液体の流入開
始及び流入停止を切り換え羽根の一方向への一連の動作
の中で行うようにしたことを特徴とする液体流量校正装
置用ダイバータ。3. A switching device for switching the flow of liquid into a weighing tank, wherein the liquid is held at regular intervals.
A switching blade composed of two blades arranged in the direction of body flow is rotatably provided, and the start and stop of the inflow of liquid into the weighing tank are performed in a series of operations in one direction of the switching blade. A diverter for a liquid flow rate calibration device characterized in that
Priority Applications (1)
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|---|---|---|---|
| JP2000238752A JP3470125B2 (en) | 2000-08-07 | 2000-08-07 | Divertor for liquid flow rate calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000238752A JP3470125B2 (en) | 2000-08-07 | 2000-08-07 | Divertor for liquid flow rate calibration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002048622A JP2002048622A (en) | 2002-02-15 |
| JP3470125B2 true JP3470125B2 (en) | 2003-11-25 |
Family
ID=18730404
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000238752A Expired - Lifetime JP3470125B2 (en) | 2000-08-07 | 2000-08-07 | Divertor for liquid flow rate calibration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012145337A (en) * | 2011-01-06 | 2012-08-02 | Ono Sokki Co Ltd | Flow meter calibration device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4604243B2 (en) * | 2004-09-10 | 2011-01-05 | 独立行政法人産業技術総合研究所 | Liquid flow meter calibration device |
| JP4608644B2 (en) * | 2004-12-10 | 2011-01-12 | 独立行政法人産業技術総合研究所 | Liquid channel switching device |
| CN103438964B (en) * | 2013-09-09 | 2016-01-20 | 中国计量科学研究院 | A kind of hermetic type open commutator |
| KR101961269B1 (en) * | 2017-11-02 | 2019-03-22 | 한국산업기술시험원 | Flow meter calibration system using diverter for flow meter calibration |
-
2000
- 2000-08-07 JP JP2000238752A patent/JP3470125B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 嶋田隆司，石油大流量校正設備，ＡＩＳＴ ｔｏｄａｙ，日本，２００２年 ２月 ７日 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012145337A (en) * | 2011-01-06 | 2012-08-02 | Ono Sokki Co Ltd | Flow meter calibration device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002048622A (en) | 2002-02-15 |
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