JPS6330973Y2 - - Google Patents
Info
- Publication number
- JPS6330973Y2 JPS6330973Y2 JP2801283U JP2801283U JPS6330973Y2 JP S6330973 Y2 JPS6330973 Y2 JP S6330973Y2 JP 2801283 U JP2801283 U JP 2801283U JP 2801283 U JP2801283 U JP 2801283U JP S6330973 Y2 JPS6330973 Y2 JP S6330973Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- valve
- back pressure
- piping
- pressure valve
- 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
Links
- 239000012530 fluid Substances 0.000 claims description 28
- 238000000926 separation method Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Description
【考案の詳細な説明】
本考案は、被測流体に多量の空気が混入するこ
とによつて計測精度が低下するのを防止しうるよ
うにした流量計測装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flow rate measuring device that can prevent a decrease in measurement accuracy due to the mixing of a large amount of air into the fluid to be measured.
一般に、流量計がルーツ型流量計、楕円歯車型
流量計等の容積式流量計または翼車式流量計等の
回転型の流量計である場合には、被測流体に多量
の空気が混入することによつて、あたかも被測流
体を計量しているかの如く回転子が回転し、混入
空気を被測流体として計測し、誤計測を起してし
まう。 Generally, when the flowmeter is a positive displacement flowmeter such as a Roots-type flowmeter or an elliptical gear-type flowmeter, or a rotary-type flowmeter such as a vane-type flowmeter, a large amount of air is mixed into the measured fluid. As a result, the rotor rotates as if it were measuring the fluid to be measured, and the mixed air is measured as the fluid to be measured, resulting in erroneous measurements.
このため、従来技術によるこの種流量計測装置
は、流量計の流入側に空気分離器を設け、該空気
分離器によつて混入空気を分離した後流量計測を
行なうようにしている。 For this reason, in this type of flow rate measuring device according to the prior art, an air separator is provided on the inflow side of the flow meter, and the flow rate is measured after the air separator separates the mixed air.
しかし、上記従来技術によるものは、空気分離
器による空気分離能力よりも被測流体内の混入空
気の方が多い場合には、空気分離器によつて分離
しきれない残りの空気が流量計に向けて流れ、結
果として誤計測を起してしまう欠点がある。 However, with the conventional technology described above, when the amount of air mixed in the fluid to be measured is greater than the air separation capacity of the air separator, the remaining air that cannot be separated by the air separator is sent to the flowmeter. This has the disadvantage that the current flows toward the target direction, resulting in erroneous measurements.
本考案は、前述した従来技術による欠点に着目
してなされたもので、被測流体内の混入空気量が
所定量以上となつたときには、被測流体が流れる
流路を閉じ、流量計測を停止させるようにした流
量計測装置を提供することを目的とするものであ
る。 The present invention was developed by focusing on the drawbacks of the conventional technology described above. When the amount of air mixed in the fluid to be measured exceeds a predetermined amount, the flow path through which the fluid to be measured flows is closed and flow rate measurement is stopped. It is an object of the present invention to provide a flow rate measuring device that allows
上記目的を達成するために、本考案は被測流体
が流れる流路の途中に流量計を設け、該流量計の
流入側に空気分離器を設け、前記流路の途中には
被測流体の圧力を背圧として開弁する背圧弁を設
け、前記空気分離器の排気口と背圧弁の圧力室と
を配管により連通し、該配管を含む空気通路の途
中には絞りを設け、前記空気分離器で分離された
空気が増加したときには前記絞りによつて前記背
圧弁の圧力室が被測流体の圧力と同圧状態となつ
て該背圧弁を閉弁するように構成したことにあ
る。 In order to achieve the above object, the present invention provides a flow meter in the middle of a flow path through which the fluid to be measured flows, an air separator on the inflow side of the flow meter, and an air separator in the middle of the flow path for the flow of the fluid to be measured. A back pressure valve that opens using pressure as back pressure is provided, the exhaust port of the air separator and the pressure chamber of the back pressure valve are communicated by piping, a restriction is provided in the middle of the air passage including the piping, and the air separation When the air separated by the device increases, the pressure chamber of the back pressure valve becomes equal to the pressure of the fluid to be measured by the throttle, and the back pressure valve is closed.
以下、本考案について図面に示す実施例に基づ
いて説明する。 The present invention will be described below based on embodiments shown in the drawings.
第１図および第２図は本考案の第１の実施例を
示し、図中１は空気分離器を示し、該空気分離器
１は流入口２Ａと流出口２Ｂとを有し、内部が流
路となると共に該流路の上方に分離室２Ｃが形成
された分離器本体２と、該分離器本体２の上面に
固着され、中央に排気口３Ａが形成された蓋体３
と、分離室２Ｃ内において液面Ｌに浮遊するフロ
ート４と、該フロート４の上方に固着され、該フ
ロート４の上下動に追従して排気口３Ａを開閉す
る弁体５とから構成される。なお、空気分離器１
内に空気分離用エレメントを挿入し、分離性能を
高めるようにしてもよい。 1 and 2 show a first embodiment of the present invention, in which reference numeral 1 indicates an air separator, the air separator 1 has an inlet 2A and an outlet 2B, and the interior thereof is A separator main body 2 that serves as a flow path and has a separation chamber 2C formed above the flow path, and a lid body 3 that is fixed to the upper surface of the separator main body 2 and has an exhaust port 3A formed in the center.
, a float 4 floating on the liquid level L in the separation chamber 2C, and a valve body 5 that is fixed above the float 4 and opens and closes the exhaust port 3A following the vertical movement of the float 4. . In addition, air separator 1
An air separation element may be inserted within the container to improve separation performance.
６は空気分離器１の次段に設けられたルーツ式
流量計からなる流量計を示し、該流量計６は分離
器本体２の流出口２Ｂと接続される流入口７Ａと
流出口７Ｂとを有し、これらの間に計量室７Ｃが
形成された流量計本体７と、該流量計７Ｃ内に回
転可能に設けられた一対の回転子８と、該回転子
８の回転を導出することによつて計測流量を表示
する表示計９とから構成される。なお、流量計６
はルーツ式流量計に代えて楕円歯車式流量計、翼
車式流量計、カルマン渦式流量計等でもよい。 Reference numeral 6 denotes a flowmeter consisting of a Roots type flowmeter provided at the next stage of the air separator 1, and the flowmeter 6 has an inlet 7A and an outlet 7B connected to the outlet 2B of the separator main body 2. A flowmeter main body 7 having a measuring chamber 7C formed therebetween, a pair of rotors 8 rotatably provided within the flowmeter 7C, and a system for deriving the rotation of the rotors 8. Therefore, it is composed of a display meter 9 that displays the measured flow rate. In addition, the flow meter 6
Instead of the Roots flowmeter, an elliptical gear flowmeter, a vane wheel flowmeter, a Karman vortex flowmeter, etc. may be used.
１０は流量計６の次段に設けられた背圧弁を示
し、該背圧弁１０は流量計本体７の流出口７Ｂと
接続される流出口１１Ａと流出口１１Ｂとを有
し、これらの間に弁座１１Ｃが形成された背圧弁
本体１１と、該背圧弁本体１１の上面に固着さ
れ、上方に給排口１２Ａが形成された蓋体１２
と、背圧弁本体１１と蓋体１２との間に挟着さ
れ、下面側に被測流体が作用し、上面側が蓋体１
２と共に圧力室１３を形成する隔壁としてのダイ
アフラム１４と、該ダイアフラム１４に固着され
た弁棒１５を介して弁座１１Ｃに離着するように
設けられた弁体１６と、該弁体１６を閉弁方向に
付勢するように圧力室１３内に張設されたばね１
７とから構成される。なお、隔壁としてはダイア
フラム１４の他にベロフラム、ピストン等であつ
てもよい。 Reference numeral 10 indicates a back pressure valve provided at the next stage of the flow meter 6, and the back pressure valve 10 has an outlet 11A and an outlet 11B connected to the outlet 7B of the flow meter main body 7, and there is a gap between them. A back pressure valve body 11 on which a valve seat 11C is formed, and a lid body 12 that is fixed to the upper surface of the back pressure valve body 11 and has a supply/discharge port 12A formed above.
is sandwiched between the back pressure valve main body 11 and the lid body 12, the fluid to be measured acts on the lower surface side, and the upper surface side is the lid body 12.
2, a diaphragm 14 as a partition that forms a pressure chamber 13, a valve body 16 provided so as to be detachable from the valve seat 11C via a valve rod 15 fixed to the diaphragm 14, and A spring 1 tensioned within the pressure chamber 13 so as to bias the valve in the valve closing direction.
It consists of 7. In addition to the diaphragm 14, the partition wall may be a velofram, a piston, or the like.
また、１８は配管を示し、該配管１８の一端は
空気分離器１の排気口３Ａに接続され、その他端
は背圧弁１０の給排口１２Ａに接続され、分離室
２Ｃと圧力室１３とを常時連通している。 Further, 18 indicates a pipe, one end of which is connected to the exhaust port 3A of the air separator 1, and the other end is connected to the supply/discharge port 12A of the back pressure valve 10, which connects the separation chamber 2C and the pressure chamber 13. We are in constant communication.
さらに、１９は絞りで、本実施例の場合には該
絞り１９は蓋体３に形成され、その一端は排気口
３Ａの途中に開口し、他端は大気に開口してい
る。そして、絞り１９の開口面積は配管１８の通
路面積に比較して小径に形成されている。なお、
前記絞り１９は配管１８の途中または給排口１２
Ａ近傍に形成してもよく、要は配管１８を含む排
気口３Ａと給排口１２Ａとの間の空気通路途中に
形成するものであればよい。 Furthermore, numeral 19 is a diaphragm, and in the case of this embodiment, the diaphragm 19 is formed on the lid 3, one end of which opens midway through the exhaust port 3A, and the other end opens to the atmosphere. The opening area of the diaphragm 19 is formed to have a smaller diameter than the passage area of the pipe 18. In addition,
The throttle 19 is located in the middle of the piping 18 or at the supply/discharge port 12.
It may be formed near A, in short, it may be formed in the middle of the air passage between the exhaust port 3A including the piping 18 and the supply/discharge port 12A.
本実施例はこのように構成されるが、被測流体
内に多量の空気が混入していない正常状態におい
ては、第１図に示す如く液面Ｌは空気分離器１の
分離室２Ｃ内のほぼ中間位置にあり、その上部は
空気部Ａとなつており、弁体５は排気口３Ａを閉
じ、該弁体５によつてフロート４は液面Ｌ内に没
している。また、配管１８は絞り１９を介して大
気と連通しているから、圧力室１３および配管１
８内の圧力P2は大気圧と同圧状態となつている。 Although the present embodiment is constructed as described above, in a normal state where a large amount of air is not mixed in the fluid to be measured, the liquid level L is equal to that in the separation chamber 2C of the air separator 1 as shown in FIG. It is located at approximately the middle position, the upper part of which is an air section A, the valve body 5 closes the exhaust port 3A, and the float 4 is submerged in the liquid level L by the valve body 5. Further, since the pipe 18 communicates with the atmosphere via the throttle 19, the pressure chamber 13 and the pipe 1
The pressure P 2 inside 8 is the same as atmospheric pressure.
一方、流入口２Ａの上流側に設けられたポンプ
（図示せず）を駆動すると、空気分離器１、流量
計６、背圧弁１０を含む流路内の被測流体の圧力
P1が上昇し、ダイアフラム１４下面に作用する
圧力P1がばね１７のばね力よりも大となると、
該ダイアフラム１４は該ばね１７に抗して上方に
変位し、弁体１６は弁座１１Ｃから離座して開弁
し、第１図の状態となつている。 On the other hand, when a pump (not shown) provided upstream of the inlet 2A is driven, the pressure of the fluid to be measured in the flow path including the air separator 1, flow meter 6, and back pressure valve 10 is increased.
When P 1 rises and the pressure P 1 acting on the lower surface of the diaphragm 14 becomes larger than the spring force of the spring 17,
The diaphragm 14 is displaced upward against the spring 17, and the valve body 16 is separated from the valve seat 11C to open the valve, resulting in the state shown in FIG.
この状態で、流出口１１Ｂの下流側に設けられ
た弁（図示せず）を開弁すると、流路内を被測流
体が流れて流量計６の回転子８を回転し、このと
きの計測流量は表示計９に積算表示される。な
お、正常状態でも被測流体中にわずかな空気が混
入しているが、この混入空気は空気分離器１で分
離されて空気部Ａに留るのみで、弁体５を開弁す
るに至らない。また、仮りに液面Ｌが低下して弁
体５がわずかに開弁しても、該弁体５は直ちに閉
弁してしまい、一方分離された空気は絞り１９か
ら大気に放出されるだけで背圧弁１０を作動する
ことはない。 In this state, when a valve (not shown) provided on the downstream side of the outlet 11B is opened, the fluid to be measured flows through the flow path and rotates the rotor 8 of the flow meter 6. The flow rate is integrated and displayed on the display meter 9. Note that even in normal conditions, a small amount of air is mixed in the measured fluid, but this mixed air is separated by the air separator 1 and remains in the air section A, and does not cause the valve body 5 to open. do not have. Furthermore, even if the liquid level L drops and the valve body 5 opens slightly, the valve body 5 will close immediately, and the separated air will only be released into the atmosphere from the throttle 19. The back pressure valve 10 will not be activated.
然るに、被測流体に大量の空気が混入している
異常状態においては、被測流体が空気分離器１内
を通過するとき、該空気分離器１で分離された大
量の空気が分離室２Ｃ内を上昇して空気部Ａ内に
急激に留る。この結果、液面Ｌが大きく低下して
第２図の状態となり、液面Ｌに浮遊するフロート
４も低下して弁体５が開弁し、空気部Ａ内の空気
は絞り１９から大気に放出される。しかし、該絞
り１９開口の面積は小さく設定されているため、
大気への放出量はわずかであり、大部分は配管１
８、給排口１２Ａを介して圧力室１３内に導入さ
れ、該配管１８、圧力室１３内の圧力P2を被測
流体の圧力P1と同圧状態とする。これにより、
圧力室１３の圧力P2がダイアフラム１４の上面
に作用して該ダイアフラム１４下面に作用する被
測流体の圧力P1と拮抗し、ばね１７のばね力で
該ダイアフラム１４を下方に伸長させ、弁棒１５
に固着された弁体１６を弁座１１Ｃに着座させて
これを閉弁する。以上の作動により、流路内の被
測流体の流れを停止し、流量計６による計測を停
止する。 However, in an abnormal state in which a large amount of air is mixed in the fluid to be measured, when the fluid to be measured passes through the air separator 1, a large amount of air separated by the air separator 1 flows into the separation chamber 2C. rises and stays in the air part A rapidly. As a result, the liquid level L drops significantly, resulting in the state shown in Figure 2, and the float 4 floating on the liquid level L also drops, opening the valve body 5, and the air in the air portion A flows through the throttle 19 to the atmosphere. released. However, since the area of the aperture of the diaphragm 19 is set small,
The amount released into the atmosphere is small, and most of it is from piping 1.
8. The fluid is introduced into the pressure chamber 13 through the supply/discharge port 12A, and the pressure P 2 in the pipe 18 and the pressure chamber 13 is made equal to the pressure P 1 of the fluid to be measured. This results in
The pressure P 2 in the pressure chamber 13 acts on the upper surface of the diaphragm 14 and counteracts the pressure P 1 of the measured fluid acting on the lower surface of the diaphragm 14, and the spring force of the spring 17 causes the diaphragm 14 to extend downward, causing the valve to open. Bar 15
The valve body 16 fixed to the valve seat 11C is seated on the valve seat 11C to close the valve. By the above operation, the flow of the fluid to be measured in the flow path is stopped, and measurement by the flowmeter 6 is stopped.
前述の状態から時間の経過と共に空気部Ａ内の
空気は絞り１９から大気に放出され、徐々に液面
Ｌとこれに浮遊するフロート４を上昇させ、弁体
５を再び閉弁する。また、配管１８、圧力室１３
内の空気も絞り１９から徐々に大気に放出され、
圧力室１３内の圧力P2とばね１７のばね力より
も、被測流体の圧力P1の方が大となつたとき、
ダイアフラム１４は再び上方に変位して弁体１６
を開弁し、再び流路内を被測流体が流れて流量計
６は計量を再開する。 As time passes from the above-mentioned state, the air in the air portion A is discharged to the atmosphere from the throttle 19, gradually raising the liquid level L and the float 4 floating thereon, and closing the valve body 5 again. In addition, piping 18, pressure chamber 13
The air inside is also gradually released into the atmosphere through the aperture 19.
When the pressure P 1 of the fluid to be measured becomes greater than the pressure P 2 in the pressure chamber 13 and the spring force of the spring 17,
The diaphragm 14 is again displaced upward and the valve body 16
The valve is opened, the fluid to be measured flows through the flow path again, and the flowmeter 6 resumes measurement.
次に、第３図は本考案の第２の実施例を示し、
前述した第１の実施例と同一構成要素にはダツシ
ユ（′）を付して、その説明を省略するものとす
る。 Next, FIG. 3 shows a second embodiment of the present invention,
Components that are the same as those in the first embodiment described above are marked with a dash (') and their explanations will be omitted.
然るに、本実施例の特徴は背圧弁１０′を空気
分離器１′と流量計６′の間に設けたことにある。 However, the feature of this embodiment is that a back pressure valve 10' is provided between the air separator 1' and the flow meter 6'.
このように構成することにより、流量計６′前
段の被測流体圧力P1を背圧弁１０′のダイアフラ
ム１４′下面に作用することができるから、前述
した第１の実施例に比較して流量計６′による圧
力損失の影響を受けることなく背圧弁１０′を作
動させることができ、弁体１６′の開弁時または
閉弁時の応答性を高めることができる。 With this configuration, the measured fluid pressure P 1 at the front stage of the flow meter 6' can be applied to the lower surface of the diaphragm 14' of the back pressure valve 10', so that the flow rate is lower than in the first embodiment described above. The back pressure valve 10' can be operated without being affected by the pressure loss caused by the pressure drop 6', and the response when the valve body 16' is opened or closed can be improved.
さらに、第４図は本考案の第３の実施例を示
し、前述した第１の実施例と同一構成要素には同
一符号を付し、その説明を省略する。 Furthermore, FIG. 4 shows a third embodiment of the present invention, in which the same components as those of the first embodiment described above are given the same reference numerals, and their explanations will be omitted.
然るに、本実施例の特徴は、背圧弁１０の蓋体
１２に小径通路２１と大径通路２２とからなる給
排口を形成し、小径通路２１を配管１８に開口さ
せ、大径通路２２を圧力室１３に開口させる。ま
た、該各通路２１，２２間の段部を弁座２３とし
て大径通路２２内にはばね２４によつて弁座２３
に常時当接するように付勢された逆止弁２５を設
け、かつ小径通路２１と圧力室１３との間にはこ
れらの間を常時連通する絞り２６を形成したこと
にある。 However, the feature of this embodiment is that a supply/discharge port consisting of a small diameter passage 21 and a large diameter passage 22 is formed in the lid 12 of the back pressure valve 10, and the small diameter passage 21 is opened to the piping 18, and the large diameter passage 22 is opened to the pipe 18. The pressure chamber 13 is opened. Further, the stepped portion between the passages 21 and 22 is used as a valve seat 23, and a valve seat 23 is installed inside the large diameter passage 22 by a spring 24.
A check valve 25 is provided which is biased so as to be in contact with the pressure chamber 13 at all times, and a restriction 26 is formed between the small diameter passage 21 and the pressure chamber 13 so as to communicate therebetween at all times.
本実施例はこのように構成されるが、第１の実
施例と同様に空気分離器１の弁体５が開弁する
と、空気部Ａ内の空気は配管１８を介して圧力室
１３内に供給される。このように配管１８からの
空気が圧力室１３内に流入するときは該空気の圧
力P2によつて逆止弁２５を直ちに開弁し、圧力
室１３内へ向け空気の自由な流通を許す。これに
よつて、背圧弁１０を迅速に閉弁し、誤計測を防
止する。 The present embodiment is configured as described above, but when the valve body 5 of the air separator 1 opens, the air in the air section A flows into the pressure chamber 13 through the pipe 18. Supplied. When the air from the pipe 18 flows into the pressure chamber 13 in this way, the check valve 25 is immediately opened by the pressure P2 of the air, allowing free flow of air into the pressure chamber 13. . This quickly closes the back pressure valve 10 and prevents erroneous measurements.
逆に、空気分離器１の空気部Ａ内の空気が大気
に排出されて弁体５が閉弁すると、流路内の被測
流体の圧力P1は圧力室１３内圧力P2よりも高く
なるから、弁体１６が開弁しようとする。しか
し、このときには逆止弁２５がばね２４によつて
弁座２３に当接して閉弁しているから、圧力室１
３内の空気は絞り２６からのみ流出することにな
つて該圧力室１３内の圧力P2は徐々に低下する。
この結果、背圧弁１０の開弁時の動作に時間遅れ
をもたすことができ、流量計６による計量再開時
にハンチングが発生するのを防止できる。 Conversely, when the air in the air section A of the air separator 1 is discharged to the atmosphere and the valve body 5 closes, the pressure P 1 of the fluid to be measured in the flow path becomes higher than the pressure P 2 in the pressure chamber 13. Therefore, the valve body 16 tries to open. However, at this time, the check valve 25 is in contact with the valve seat 23 due to the spring 24 and is closed, so the pressure chamber 1
The air in the pressure chamber 13 flows out only through the throttle 26, and the pressure P2 in the pressure chamber 13 gradually decreases.
As a result, a time delay can be caused in the opening operation of the back pressure valve 10, and hunting can be prevented from occurring when the flowmeter 6 resumes metering.
本考案は、以上詳細に述べた如くであつて、被
測流体内に空気が混入しているときには空気分離
器による分離空気で背圧弁を強制的に閉弁し、流
量計による計測を停止させることができるから、
混入空気を被測流体として誤計測してしまう事故
を防止できる。また、背圧弁によつて計測を停止
させるものであるから、空気分離器の容量を小さ
くできる。また、絞りを開度調節することによつ
て大気中への放出空気量を制御することができる
から、背圧弁の応答性を高めることができる。さ
らに、背圧弁を流量計の流入側に設けることによ
り該流量計による圧力損失の影響を除去でき、し
かも配管と背圧弁の圧力室との間に絞りを設ける
ことにより、流量計測再開時のハンチングを防止
しうる等幾多の効果を奏する。 The present invention, as described in detail above, forcibly closes the back pressure valve with air separated by the air separator when air is mixed in the fluid to be measured, and stops measurement by the flow meter. Because you can
Accidents in which mixed air is mistakenly measured as the fluid to be measured can be prevented. Furthermore, since the measurement is stopped by the back pressure valve, the capacity of the air separator can be reduced. Furthermore, since the amount of air released into the atmosphere can be controlled by adjusting the opening of the throttle, the responsiveness of the back pressure valve can be improved. Furthermore, by providing a back pressure valve on the inflow side of the flow meter, the influence of pressure loss due to the flow meter can be removed, and by providing a restriction between the piping and the pressure chamber of the back pressure valve, hunting when restarting flow measurement can be eliminated. It has many effects such as preventing
第１図および第２図は本考案の第１の実施例を
示し、第１図は正常な計測状態を示す縦断面図、
第２図は背圧弁が閉弁した異常状態を示す縦断面
図、第３図は本考案の第２の実施例を示す縦断面
図、第４図は本考案の第３の実施例を示す部分縦
断面図である。
１…空気分離器、３Ａ…排気口、６…流量計、
１０…背圧弁、１３…圧力室、１８…配管、１９
…絞り。
1 and 2 show a first embodiment of the present invention, and FIG. 1 is a vertical cross-sectional view showing a normal measurement state;
Fig. 2 is a longitudinal sectional view showing an abnormal state in which the back pressure valve is closed; Fig. 3 is a longitudinal sectional view showing a second embodiment of the invention; Fig. 4 is a longitudinal sectional view showing a third embodiment of the invention. It is a partial vertical cross-sectional view. 1... Air separator, 3A... Exhaust port, 6... Flow meter,
10... Back pressure valve, 13... Pressure chamber, 18... Piping, 19
...Aperture.
Claims (1)
け、該流量計の流入側に空気分離器を設け、前
記流路の途中には被測流体の圧力を背圧として
開弁する背圧弁を設け、前記空気分離器の排気
口と背圧弁の圧力室とを配管により連通し、該
配管を含む空気通路の途中には絞りを設け、前
記空気分離器で分離された空気が増加したとき
には前記背圧弁に作用する空気の圧力によつて
該背圧弁を閉弁するように構成した流量計測装
置。 (2) 前記背圧弁は前記流量計の流入側または流出
側のいずれか一方に配設してなる実用新案登録
請求の範囲(1)項記載の流量計測装置。 (3) 前記配管と背圧弁の圧力室との間には、該配
管側から圧力室内への空気の自由な流通を許す
逆止弁と、該圧力室側から配管への空気の排出
を制限する絞りとを設け、背圧弁再開弁時のハ
ンチングを防止してなる実用新案登録請求の範
囲(1)項記載の流量計測装置。[Claims for Utility Model Registration] (1) A flow meter is provided in the middle of a flow path through which the fluid to be measured flows, an air separator is provided on the inflow side of the flow meter, and a A back pressure valve that opens using pressure as back pressure is provided, the exhaust port of the air separator and the pressure chamber of the back pressure valve are communicated by piping, a restriction is provided in the middle of the air passage including the piping, and the air separation A flow rate measuring device configured to close the back pressure valve by the pressure of the air acting on the back pressure valve when the amount of air separated by the device increases. (2) The flow rate measuring device according to claim (1), wherein the back pressure valve is disposed on either the inflow side or the outflow side of the flowmeter. (3) Between the piping and the pressure chamber of the back pressure valve, there is a check valve that allows free flow of air from the piping side into the pressure chamber, and a check valve that restricts the discharge of air from the pressure chamber side to the piping. The flow rate measuring device according to claim (1), which is a registered utility model, and is provided with a throttle to prevent hunting when the back pressure valve is restarted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2801283U JPS59134023U (en) | 1983-02-26 | 1983-02-26 | Flow rate measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2801283U JPS59134023U (en) | 1983-02-26 | 1983-02-26 | Flow rate measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59134023U JPS59134023U (en) | 1984-09-07 |
| JPS6330973Y2 true JPS6330973Y2 (en) | 1988-08-18 |
Family
ID=30158887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2801283U Granted JPS59134023U (en) | 1983-02-26 | 1983-02-26 | Flow rate measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59134023U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3520855B2 (en) * | 2001-02-22 | 2004-04-19 | 株式会社タツノ・メカトロニクス | Liquefied gas measuring device |
-
1983
- 1983-02-26 JP JP2801283U patent/JPS59134023U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59134023U (en) | 1984-09-07 |
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