JP6293587B2 - Flow meter calibration device - Google Patents
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- JP6293587B2 JP6293587B2 JP2014132144A JP2014132144A JP6293587B2 JP 6293587 B2 JP6293587 B2 JP 6293587B2 JP 2014132144 A JP2014132144 A JP 2014132144A JP 2014132144 A JP2014132144 A JP 2014132144A JP 6293587 B2 JP6293587 B2 JP 6293587B2
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- 239000007788 liquid Substances 0.000 claims description 160
- 238000000034 method Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000012085 test solution Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Description
本発明は、液体の流量計の校正装置において、気泡混入を抑制する技術に関するものである。 The present invention relates to a technique for suppressing bubble mixing in a liquid flowmeter calibration apparatus.
液体の流量計の校正装置としては、液体を溜める試験液タンクと、試験液タンクに連結された管路と、管路に設置された流量計と、管路を流れる液体が流出するノズルと、ノズルから流出する液体を溜める容器と、容器に溜った液体の質量を測定する質量計とを備え、質量計で測定した質量を用いてノズルから流出した液体の実容量を算出し、前記流量計を校正する、通液式秤量法を用いた校正装置が知られている（たとえば、特許文献１）。 As a liquid flow meter calibration device, a test liquid tank for storing liquid, a pipe connected to the test liquid tank, a flow meter installed in the pipe, a nozzle through which the liquid flowing through the pipe flows out, A container for storing the liquid flowing out from the nozzle and a mass meter for measuring the mass of the liquid stored in the container, and calculating the actual volume of the liquid flowing out from the nozzle using the mass measured by the mass meter, A calibration apparatus using a liquid-weighing method is known (for example, Patent Document 1).
上述した液体の流量計の校正装置においては、液体に気泡が混入すると、流量計で精度よく流量を測定できなくなり正しく流量計を校正することができなくなる。
一方で、作業性や構造の単純化の観点からは、試験液タンクへの液体の回収は、液体を上方より試験液タンクへ注ぎ込むことにより行うことが簡便であるが、このようにすると、液体の落下の際に周囲の空気が液体中に巻き込まれ気泡が発生してしまう場合がある。
In the liquid flow meter calibration apparatus described above, if bubbles are mixed in the liquid, the flow rate cannot be accurately measured by the flow meter, and the flow meter cannot be correctly calibrated.
On the other hand, from the viewpoint of workability and simplification of the structure, it is easy to recover the liquid to the test liquid tank by pouring the liquid from above into the test liquid tank. When air drops, the surrounding air may be entrained in the liquid and bubbles may be generated.
そこで、本発明は、流量計校正装置において、試験液タンクへの液体の回収時の気泡の混入を抑制することを課題とする。 In view of the above, an object of the present invention is to suppress air bubbles from being mixed into the test liquid tank when collecting the liquid in the flowmeter calibration apparatus.
前記課題達成のために、本発明は、液体を蓄えるタンクと、当該タンクに連結した流量計と、前記流量計を通過した液体を溜める容器と、前記容器に溜った液体の質量または体積を計測する計測器とを備えた流量計校正装置に、前記容器内の前記液体が上方より注ぎ込まれる液体受入槽と、前記液体受入槽の排出孔から前記タンク内部までの前記液体の流路となる連結管と、前記排出孔を覆うように配置されたメッシュとを設けたものである。ただし、前記液体受入槽の液体は、前記メッシュを通過した後に前記メッシュの下面で一箇所に集まって一本の細流として前記連結管に垂れ落ちる形態で、当該連結管に流入するものである。 In order to achieve the above object, the present invention measures a tank for storing liquid, a flow meter connected to the tank, a container for storing liquid that has passed through the flow meter, and the mass or volume of the liquid stored in the container. A liquid receiving tank into which the liquid in the container is poured from above into a flowmeter calibration device including a measuring instrument that performs a connection to be a flow path of the liquid from a discharge hole of the liquid receiving tank to the inside of the tank A tube and a mesh arranged to cover the discharge hole are provided. However, after passing through the mesh, the liquid in the liquid receiving tank flows into the connection pipe in a form that gathers at one place on the lower surface of the mesh and hangs down as a single trickle.
このような流量計校正装置によれば、液体がメッシュを通過する過程やメッシュの下面の中央に集って細流となる過程において、液体に混入している気泡は液体外部に排出されていく。また、細流となってゆっくりと垂れ落ちていくので、液体が多くの滴となって滴下する場合に比べ、落下先で衝撃などにより気泡が生じることも抑制される。 According to such a flowmeter calibration apparatus, bubbles that are mixed in the liquid are discharged to the outside of the liquid in a process in which the liquid passes through the mesh or a process in which the liquid gathers in the center of the lower surface of the mesh and becomes a trickle. In addition, since the liquid drops slowly as a trickle, the occurrence of bubbles due to impact or the like at the dropping destination is suppressed as compared with the case where the liquid drops as many drops.
ここで、このような流量計校正装置は、前記メッシュを、下面が水平方向中央部に向かって下方に凹んだ形状を有するものとすることも好ましい。
このような形状のメッシュを用いることにより、メッシュを通過した液体を、より確実に前記メッシュの下面の中央部に集めて、細流化することができるようになる。
また、以上の流量計校正装置は、前記液体受入槽の内部に、前記容器から注ぎ込まれた液体を上面で受けるように配置された、上下方向に斜めに傾いた板を設けることも好ましい。
Here, in such a flowmeter calibration apparatus, it is also preferable that the mesh has a shape in which the lower surface is recessed downward toward the horizontal central portion.
By using a mesh having such a shape, the liquid that has passed through the mesh can be more reliably collected and trickled at the center of the lower surface of the mesh.
In the above-described flow meter calibration apparatus, it is also preferable to provide a plate inclined obliquely in the vertical direction and disposed so as to receive the liquid poured from the container on the upper surface inside the liquid receiving tank.
このように斜めの板を設けることにより、容器から液体受入槽への液体の注ぎ込み時に、液体は最初に板に斜めに衝突することとなるので、液体受入槽の下の内壁に液体が直接衝突する場合に比べ、投入された液体に加わる衝撃は小さくなる。よって、液体が激しく跳ね返るなどして周辺の空気を液体内に巻き込んでしまうことを抑制できる。また、以上のように斜めの板を設けることにより、投入された液体が既に液体受入槽に溜まっている液体に直接衝突し、溜まっている液体内に空気を巻き込んでしまうこともない。 By providing an inclined plate in this way, when the liquid is poured from the container into the liquid receiving tank, the liquid first strikes the plate diagonally, so that the liquid directly collides with the inner wall under the liquid receiving tank. Compared with the case where it does, the impact added to the injected liquid becomes small. Therefore, it is possible to suppress the surrounding air from being entrained in the liquid due to the liquid rebounding violently. Further, by providing an inclined plate as described above, the input liquid does not directly collide with the liquid already stored in the liquid receiving tank, and air is not caught in the stored liquid.
また、以上の流量計校正装置は、前記連結管に、当該連結管に流入した前記液体を螺旋状に下方に導く流路を形成するようにしてよい。
このように液体を螺旋状に下方へ導く流路を連結管に設けることにより、連結管に流入した液体が、連結管および試験液タンクに既に溜まっている液体に直接衝突し、溜まっている液体内に空気を巻き込んでしまうことが抑制される。また、液体が螺旋の流路に沿って流れる間に、液体中の気泡は液体中から上方に抜け出していくこととなる。
In the above flowmeter calibration apparatus, a flow path that guides the liquid flowing into the connection pipe downward in a spiral shape may be formed in the connection pipe.
In this way, by providing the connecting pipe with a flow path that guides the liquid downward in a spiral manner, the liquid that has flowed into the connecting pipe directly collides with the liquid already stored in the connecting pipe and the test solution tank, and the stored liquid. It is suppressed that air is involved in the inside. Further, while the liquid flows along the spiral flow path, the bubbles in the liquid escape upward from the liquid.
以上のように、本発明によれば、流量計校正装置において、試験液タンクへの液体の回収時の気泡の混入を抑制することができる。 As described above, according to the present invention, in the flowmeter calibration apparatus, it is possible to suppress the mixing of bubbles when the liquid is collected into the test liquid tank.
以下、本発明の実施形態について説明する。
図1に、本実施形態に係る流量計校正装置の構成を示す。
図示するように、流量計校正装置は、液体を溜める試験液タンク１００、フィルタ１０１、ポンプ１０２、アキュムレータ１０３、流量計1０４、流量調整弁１０５、ノズル１０６、リリーフ弁１０７、容器１０８、質量計１０９、液体受入槽１１０、連結管１２０とを備えている。
Hereinafter, embodiments of the present invention will be described.
FIG. 1 shows a configuration of a flow meter calibration apparatus according to the present embodiment.
As shown in the figure, the flowmeter calibration apparatus includes a test liquid tank 100 for storing liquid, a filter 101, a pump 102, an accumulator 103, a flowmeter 104, a flow rate adjustment valve 105, a nozzle 106, a relief valve 107, a container 108, and a mass meter 109. The liquid receiving tank 110 and the connecting pipe 120 are provided.
このような流量計校正装置において、流量調整弁１０５が開かれると、試験液タンク１００に貯められた液体は、試験液タンク１００の下部に連結された導出管路２０１から導出され、フィルタ１０１を通過してポンプ１０２に送られ、リリーフ弁１０７とアキュムレータ１０３の作用により、一定圧で流量計１０４を通り、ノズル１０６から容器１０８に注がれる。 In such a flowmeter calibration apparatus, when the flow rate adjustment valve 105 is opened, the liquid stored in the test liquid tank 100 is led out from the outlet pipe 201 connected to the lower part of the test liquid tank 100, and the filter 101 is passed through. It is passed through to the pump 102 and is poured into the container 108 from the nozzle 106 through the flow meter 104 at a constant pressure by the action of the relief valve 107 and the accumulator 103.
そして、容器１０８に溜まった液体の質量が質量計１０９で測定され、質量計１０９で測定された質量から得られた、ノズル１０６から流出した液体の実容量を用いて流量計１０４の校正が行われる。ただし、質量計１０９に代えて、メスシリンダー等の、容器１０８に溜まった液体の体積を測定する計測器を設けてノズル１０６から流出した液体の実容量を計測して、流量計１０４の校正を行うようにしてもよい。 The mass of the liquid accumulated in the container 108 is measured by the mass meter 109, and the flow meter 104 is calibrated using the actual volume of the liquid flowing out from the nozzle 106 obtained from the mass measured by the mass meter 109. Is called. However, in place of the mass meter 109, a measuring instrument for measuring the volume of the liquid accumulated in the container 108, such as a graduated cylinder, is provided to measure the actual volume of the liquid flowing out from the nozzle 106 to calibrate the flow meter 104. You may make it perform.
なお、流量計１０４に送る試験液の調圧のためにリリーフ弁１０７の２次側排出口から出た液体は、還流用管路２０２を通って試験液タンク１００に戻される。
ここで、試験液タンク１００への液体の回収は、液体受入槽１１０に、容器１０８に溜まった液体を上方より注ぎ込むことにより行われ、液体受入槽１１０に注ぎ込まれた液体は、連結管１２０を通って試験液タンク１００に流入する。
Note that the liquid discharged from the secondary discharge port of the relief valve 107 for adjusting the pressure of the test liquid sent to the flow meter 104 is returned to the test liquid tank 100 through the reflux conduit 202.
Here, the recovery of the liquid into the test liquid tank 100 is performed by pouring the liquid accumulated in the container 108 into the liquid receiving tank 110 from above, and the liquid poured into the liquid receiving tank 110 passes through the connecting pipe 120. And flows into the test liquid tank 100.
なお、試験液タンク１００の内部には、液体受入槽１１０に注ぎ込まれた液体が、直接、導出管路２０１から導出させないようにするための障壁１００１が設けられている。このように、試験液タンク１００に流入した液体を障壁１００１で蛇行させて導出管路２０１に到達させることにより、導出管路２０１から導出されるまでに、試験液タンク流入時に液体中に含まれていた気泡が、ある程度、液体上方に抜けていくようになる。 Note that a barrier 1001 is provided inside the test liquid tank 100 to prevent the liquid poured into the liquid receiving tank 110 from being directly led out from the outlet pipe 201. In this way, the liquid that has flowed into the test liquid tank 100 is meandered by the barrier 1001 and reaches the outlet pipe 201 so that the liquid is contained in the liquid when flowing into the test liquid tank before being led out from the outlet pipe 201. The bubbles that have been discharged come to some extent above the liquid.
さて、このような流量計校正装置の構成において、液体の試験液タンク１００への回収時における気泡混入を抑制するために、液体受入槽１１０には斜板１１０１が設けられており、液体受入槽１１０と連結管１２０の連結部には気泡除去器１３０が設けられており、連結管１２０には螺旋流路１２０１が設けられている。 In such a configuration of the flowmeter calibration apparatus, the liquid receiving tank 110 is provided with a swash plate 1101 in order to suppress bubbles from being mixed when the liquid is collected in the test liquid tank 100, and the liquid receiving tank. A bubble remover 130 is provided at a connecting portion between 110 and the connecting pipe 120, and a spiral channel 1201 is provided in the connecting pipe 120.
まず、液体受入槽１１０に設けた斜板１１０１について説明する。
図２ａに正面図を示すように、斜板１１０１は、液体受入槽１１０の内部に配置された、容器１０８から液体受入槽１１０への液体投入側を手前側として、手前側から奥側に向かって下方に傾いた板である。また、図２ｂに上面図を示すように斜板１１０１の手前側端と容器１０８の手前側内壁、斜板１１０１の左右側端と容器１０８の左右側内壁は隙間なく連結しており、斜板１１０１の奥側端と容器１０８の奥側内壁の間には隙間が設けられている。
First, the swash plate 1101 provided in the liquid receiving tank 110 will be described.
As shown in the front view of FIG. 2a, the swash plate 1101 is disposed inside the liquid receiving tank 110 and is directed from the front side to the back side with the liquid input side from the container 108 to the liquid receiving tank 110 as the front side. It is a plate inclined downward. 2b, the front side end of the swash plate 1101 and the front side inner wall of the container 108, and the left and right side ends of the swash plate 1101 and the left and right side inner walls of the container 108 are connected without a gap. A gap is provided between the rear end of 1101 and the inner wall of the container 108.
したがって、図示するように、手前側上方の容器１０８から液体受入槽１１０へ液体を注ぎ込むと、液体は斜板１１０１に斜めに当たり、その後、手前側から奥側に斜板１１０１に沿って流れ、斜板１１０１の奥側端と容器１０８の奥側内壁の間の隙間を通って液体受入槽１１０の下方の空間に流入する。そして、その後、液体受入槽１１０と連結管１２０の連結部の気泡除去器１３０を通過し、連結管１２０の内部へと進んでいく。 Therefore, as shown in the figure, when the liquid is poured from the container 108 on the front side into the liquid receiving tank 110, the liquid strikes the swash plate 1101 obliquely, and then flows along the swash plate 1101 from the front side to the back side. It flows into the space below the liquid receiving tank 110 through a gap between the back end of the plate 1101 and the inner wall of the container 108. Then, after passing through the bubble remover 130 at the connecting portion between the liquid receiving tank 110 and the connecting pipe 120, the liquid proceeds to the inside of the connecting pipe 120.
以上のように斜板１１０１を設けることにより、容器１０８から液体受入槽１１０への液体投入時に、液体は斜板１１０１に斜めに衝突することとなるので、液体受入槽１１０の下側の内壁に液体が直接衝突する場合に比べ、投入された液体に加わる衝撃は小さい。よって、液体が激しく跳ね返るなどして周辺の空気を液体内に巻き込んでしまうことを抑制できる。また、以上のように斜板１１０１を設けることにより、投入された液体が既に液体受入槽１１０に溜まっている液体に直接衝突し、溜まっている液体内に空気を巻き込んでしまうこともない。また、液体が斜板１１０１に沿って流れる間に、液体中の気泡は液体中から上方に抜け出していくこととなる。 By providing the swash plate 1101 as described above, the liquid collides obliquely with the swash plate 1101 when the liquid is supplied from the container 108 to the liquid receiving tank 110. Compared with the case where the liquid collides directly, the impact applied to the charged liquid is small. Therefore, it is possible to suppress the surrounding air from being entrained in the liquid due to the liquid rebounding violently. Further, by providing the swash plate 1101 as described above, the input liquid does not directly collide with the liquid already stored in the liquid receiving tank 110, and air is not involved in the stored liquid. In addition, while the liquid flows along the swash plate 1101, bubbles in the liquid escape upward from the liquid.
次に、液体受入槽１１０と連結管１２０の連結部に設けた気泡除去器１３０について説明する。
図３ａに気泡除去器１３０の構成を示す。
図３ａ中、図３ａ１が気泡除去器１３０の上面を、図３ａ２が図３ａ１の断面線Ａ-Ａによる断面を、図３ａ３が気泡除去器１３０の下面を表している。
図示するように、気泡除去器１３０は、ドーム状に下方に凹んだ上部メッシュ１３１と下部メッシュ１３２とを、上下に並べた配置でリング状のフレーム１３３で固定したものである。
Next, the bubble remover 130 provided at the connecting portion between the liquid receiving tank 110 and the connecting pipe 120 will be described.
FIG. 3 a shows the configuration of the bubble remover 130.
In FIG. 3a, FIG. 3a1 represents the upper surface of the bubble remover 130, FIG. 3a2 represents the cross section taken along the section line AA of FIG. 3a1, and FIG.
As shown in the figure, the bubble remover 130 is obtained by fixing an upper mesh 131 and a lower mesh 132, which are recessed downward in a dome shape, with a ring-shaped frame 133 in a vertically arranged manner.
ここで、上部メッシュ１３１と下部メッシュ１３２の目開きは、液体が動粘度4.0平方mm/sの軽油であれば、たとえば、上部メッシュ１３１、下部メッシュ１３２は粒度330μm、液体が動粘度1.1平方mm/sのソルベントであれば、上部メッシュ１３１、下部メッシュ１３２は粒度50μmとすればよい。ここで上部メッシュ１３１と下部メッシュ１３２の目開きを異ならせるようにしてもよい。 Here, when the mesh of the upper mesh 131 and the lower mesh 132 is a light oil having a kinematic viscosity of 4.0 square mm / s, for example, the upper mesh 131 and the lower mesh 132 have a particle size of 330 μm and the liquid has a kinematic viscosity of 1.1 square mm. If the solvent is / s, the upper mesh 131 and the lower mesh 132 may have a particle size of 50 μm. Here, the meshes of the upper mesh 131 and the lower mesh 132 may be different.
さて、このような気泡除去器１３０は、図２ｂに示すように、液体受入槽１１０と連結管１２０との連結部となる、液体受入槽１１０の下部の排出孔を塞ぐように液体受入槽１１０に固定される。 Now, as shown in FIG. 2 b, the bubble remover 130 has a liquid receiving tank 110 that closes a discharge hole in the lower part of the liquid receiving tank 110 that serves as a connecting portion between the liquid receiving tank 110 and the connecting pipe 120. Fixed to.
ここで、このような気泡除去器１３０によれば、液体受入槽１１０に溜まった液体は、気泡除去器１３０の上部メッシュ１３１、下部メッシュ１３２から下方に滲み出すと共に、下部メッシュ１３２の下面において表面張力と重力により、下部メッシュ１３２の下面の中央に集まり、細流となって下方の連結管１２０の内部にゆっくりと垂れ落ちていく。 Here, according to such a bubble remover 130, the liquid accumulated in the liquid receiving tank 110 oozes downward from the upper mesh 131 and the lower mesh 132 of the bubble remover 130, and on the lower surface of the lower mesh 132. Due to the tension and gravity, they gather at the center of the lower surface of the lower mesh 132, become a trickle, and slowly hang down inside the connecting pipe 120 below.
そして、このように上部メッシュ１３１と下部メッシュ１３２から滲み出す過程や下部メッシュ１３２の下面の中央に集って細流となる過程において、液体に混入している気泡は液体外部に排出されていく。また、細流となってゆっくりと垂れ落ちていくので、液体が多くの滴となって滴下する場合に比べ、落下先で衝撃などにより気泡が生じることも抑制される。 Then, in the process of oozing out from the upper mesh 131 and the lower mesh 132 and in the process of gathering in the center of the lower surface of the lower mesh 132 and forming a trickle, bubbles mixed in the liquid are discharged to the outside of the liquid. In addition, since the liquid drops slowly as a trickle, the occurrence of bubbles due to impact or the like at the dropping destination is suppressed as compared with the case where the liquid drops as many drops.
なお、気泡除去器１３０の上部メッシュ１３１と下部メッシュ１３２の形状は必ずしもドーム状に下方に凹んだ形状でなくてもよい。
すなわち、たとえば、図３ｃに示すように、上部メッシュ１３１を円板状のメッシュとし、下部メッシュ１３２のみをドーム状に下方に凹んだ形状としてもよい。なお、図３ｃ１が気泡除去器１３０の上面を、図３ｃ２が図３ｃ１の断面線Ａ-Ａによる断面を、図３ｃ３が気泡除去器１３０の下面を表している。
In addition, the shape of the upper mesh 131 and the lower mesh 132 of the bubble remover 130 does not necessarily have to be a dome-like shape recessed downward.
That is, for example, as shown in FIG. 3c, the upper mesh 131 may be a disk-shaped mesh and only the lower mesh 132 may be recessed downward in a dome shape. 3c1 shows the upper surface of the bubble remover 130, FIG. 3c2 shows the cross section taken along the section line AA of FIG. 3c1, and FIG. 3c3 shows the lower surface of the bubble remover 130.
または、図３ｄに示すように、上部メッシュ１３１と下部メッシュ１３２との双方を円板状のメッシュとしてもよい。なお、図３ｄ１が気泡除去器１３０の上面を、図３ｄ２が図３ｄ１の断面線Ａ-Ａによる断面を、図３ｄ３が気泡除去器１３０の下面を表している。 Alternatively, as shown in FIG. 3d, both the upper mesh 131 and the lower mesh 132 may be disk-shaped meshes. 3d1 represents the upper surface of the bubble remover 130, FIG. 3d2 represents the cross section taken along the section line AA of FIG. 3d1, and FIG. 3d3 represents the lower surface of the bubble remover 130.
図３ｃ、ｄに示したような気泡除去器１３０を用いても、液体に応じて、上部メッシュ１３１と下部メッシュ１３２の目開きを適当に設定することにより、液体受入槽１１０に溜まった液体を、下部メッシュ１３２の下面の中央より、細流として連結管１２０の内部に垂れ落とすことができる。また、以上のように上部メッシュ１３１と下部メッシュ１３２との二つのメッシュを用いずとも、目開きを適当に設定することにより、単一のメッシュを用いて、メッシュの下面の中央より、細流として連結管１２０の内部に垂れ落とすこともできる。 Even if the bubble remover 130 as shown in FIGS. 3C and 3D is used, the liquid accumulated in the liquid receiving tank 110 can be set by appropriately setting the openings of the upper mesh 131 and the lower mesh 132 according to the liquid. From the center of the lower surface of the lower mesh 132, it can be dropped into the inside of the connecting pipe 120 as a trickle. Further, as described above, without using the two meshes of the upper mesh 131 and the lower mesh 132, by setting the mesh appropriately, a single mesh can be used as a trickle from the center of the lower surface of the mesh. It can also hang down inside the connecting tube 120.
次に、連結管１２０に設けた螺旋流路１２０１について説明する。
図４に連結管１２０に設けた螺旋流路１２０１を示す。
図示するように、螺旋流路１２０１は、気泡除去器１３０を通過して連結管１２０に流入した液体を螺旋状に下方に導く流路である。
このような螺旋流路１２０１によれば、気泡除去器１３０を通過して連結管１２０に流入した液体が、連結管１２０に既に溜まっている液体に直接衝突し、溜まっている液体内に空気を巻き込んでしまうことが抑制される。また、液体が螺旋流路１２０１に沿って流れる間に、液体中の気泡は液体中から上方に抜け出していくこととなる。
Next, the spiral flow path 1201 provided in the connecting pipe 120 will be described.
FIG. 4 shows a spiral channel 1201 provided in the connecting pipe 120.
As shown in the figure, the spiral flow path 1201 is a flow path that guides the liquid that has passed through the bubble remover 130 and flows into the connecting pipe 120 downward in a spiral shape.
According to such a spiral flow path 1201, the liquid that has passed through the bubble remover 130 and has flowed into the connection pipe 120 directly collides with the liquid that has already accumulated in the connection pipe 120, and air is trapped in the accumulated liquid. Entrainment is suppressed. In addition, while the liquid flows along the spiral flow path 1201, bubbles in the liquid escape upward from the liquid.
ここで、螺旋流路１２０１の上端は、できるだけ気泡除去器１３０の下端に近い高さとすることが、気泡除去器１３０から螺旋流路１２０１に液体を衝撃少なく流入させる上でこのましい。 Here, it is preferable that the upper end of the spiral channel 1201 is as close as possible to the lower end of the bubble remover 130 so that the liquid flows from the bubble remover 130 into the spiral channel 1201 with little impact.
なお、図示するように、常時、螺旋流路１２０１の下端が連結管１２０に溜まっている液体内の位置となるように、螺旋流路１２０１の配置や、試験液タンク１００の液面高さの変動幅を設定するようにすることも、螺旋流路１２０１から液体を連結管１２０に溜まっている液体内に衝撃なくに流入させる上で好ましい。 As shown in the drawing, the arrangement of the spiral flow path 1201 and the liquid level height of the test liquid tank 100 are always set so that the lower end of the spiral flow path 1201 is located in the liquid collected in the connecting pipe 120. It is also preferable to set the fluctuation range so that the liquid flows from the spiral flow path 1201 into the liquid accumulated in the connecting pipe 120 without impact.
以上、本発明の実施形態について説明した。
なお、以上の実施形態では、液体の試験液タンク１００への回収時における気泡混入を抑制するために、液体受入槽１１０の斜板１１０１と、気泡除去器１３０と、連結管１２０の螺旋流路１２０１を設けた場合について説明したが、液体受入槽１１０の斜板１１０１や連結管１２０の螺旋流路１２０１の一方もしくは双方は、必ずしも、これを設けなくても良い。
The embodiment of the present invention has been described above.
In the above embodiment, in order to suppress mixing of bubbles when the liquid is collected into the test solution tank 100, the swash plate 1101 of the liquid receiving tank 110, the bubble remover 130, and the spiral flow path of the connecting tube 120 are used. Although the case where 1201 is provided has been described, one or both of the swash plate 1101 of the liquid receiving tank 110 and the spiral flow path 1201 of the connecting pipe 120 are not necessarily provided.
１００…試験液タンク、１０１…フィルタ、１０２…ポンプ、１０３…アキュムレータ、１０４…流量計、１０５…流量調整弁、１０６…ノズル、１０７…リリーフ弁、１０８…容器、１０９…質量計、１１０…液体受入槽、１２０…連結管、１３０…気泡除去器、１３１…上部メッシュ、１３２…下部メッシュ、１３３…フレーム、２０１…導出管路、２０２…還流用管路、１００１…障壁、１１０１…斜板、１２０１…螺旋流路。 DESCRIPTION OF SYMBOLS 100 ... Test liquid tank, 101 ... Filter, 102 ... Pump, 103 ... Accumulator, 104 ... Flow meter, 105 ... Flow control valve, 106 ... Nozzle, 107 ... Relief valve, 108 ... Container, 109 ... Mass meter, 110 ... Liquid Receiving tank, 120 ... connecting pipe, 130 ... bubble remover, 131 ... upper mesh, 132 ... lower mesh, 133 ... frame, 201 ... outlet pipe, 202 ... reflux pipe, 1001 ... barrier, 1101 ... swash plate, 1201 ... Spiral flow path.
Claims (4)
前記容器内の前記液体が上方より注ぎ込まれる液体受入槽と、
前記液体受入槽の排出孔から前記タンク内部までの前記液体の流路となる連結管と、
前記排出孔を覆うように配置されたメッシュを有し、
前記液体受入槽の液体は、前記メッシュを通過した後に前記メッシュの下面で一箇所に集まって一本の細流として前記連結管に垂れ落ちる形態で、当該連結管に流入することを特徴とする流量計校正装置。
A flowmeter calibration apparatus comprising a tank for storing liquid, a flow meter connected to the tank, a container for storing liquid that has passed through the flow meter, and a measuring instrument for measuring the mass or volume of the liquid stored in the container Because
A liquid receiving tank into which the liquid in the container is poured from above;
A connecting pipe serving as a flow path for the liquid from the discharge hole of the liquid receiving tank to the inside of the tank;
Having a mesh arranged to cover the discharge hole;
The liquid in the liquid receiving tank flows into the connecting pipe in a form that gathers at one place on the lower surface of the mesh and hangs down to the connecting pipe as one trickle after passing through the mesh. Meter calibration device.
前記メッシュの下面は、水平方向中央部に向かって下方に凹んだ形状を有することを特徴とする流量計校正装置。
The flowmeter calibration device according to claim 1,
The flowmeter calibration device according to claim 1, wherein the lower surface of the mesh has a shape recessed downward toward the center in the horizontal direction.
前記液体受入槽の内部には、前記容器から注ぎ込まれた液体を上面で受けるように配置された、上下方向に斜めに傾いた板が設けられていることを特徴とする流量計校正装置。
The flowmeter calibration device according to claim 1 or 2,
A flowmeter calibration device, characterized in that a plate inclined so as to be inclined in the vertical direction is provided inside the liquid receiving tank so as to receive the liquid poured from the container on the upper surface.
前記連結管には、当該連結管に流入した前記液体を螺旋状に下方へ導く流路が形成されている特徴とする流量計校正装置。 The flowmeter calibration device according to claim 1, 2, or 3,
A flowmeter calibration apparatus, wherein the connecting pipe is formed with a flow path that guides the liquid flowing into the connecting pipe downward in a spiral shape.
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