JP3682735B2 - Governor pressure regulator installation mechanism - Google Patents

Governor pressure regulator installation mechanism Download PDF

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Publication number
JP3682735B2
JP3682735B2 JP04765396A JP4765396A JP3682735B2 JP 3682735 B2 JP3682735 B2 JP 3682735B2 JP 04765396 A JP04765396 A JP 04765396A JP 4765396 A JP4765396 A JP 4765396A JP 3682735 B2 JP3682735 B2 JP 3682735B2
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JP
Japan
Prior art keywords
pressure regulating
governor
pipe
tube
outlet pipe
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 - Fee Related
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JP04765396A
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Japanese (ja)
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JPH09242998A (en
Inventor
正勝 三留
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Gas Co Ltd
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Tokyo Gas Co Ltd
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Filing date
Publication date
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Priority to JP04765396A priority Critical patent/JP3682735B2/en
Publication of JPH09242998A publication Critical patent/JPH09242998A/en
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  • Control Of Fluid Pressure (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、都市ガス供給系統等におけるガバナの整圧管設置機構に関するものである。
【0002】
【従来の技術】
ガバナにおいて二次側圧力を検知するための整圧管は、圧力の安定している個所、即ちガバナのメインバルブから離れ、レジュ−サ部を経て太径となっている出口管の部分に接続して圧力を取り出す必要がある。
【0003】
一方、工場で標準製作されたガバナユニット、即ち、入出力バルブ、フィルタ、遮断弁等の、ガバナ前後に必要な装置をガバナと共に工場でユニット化したものでは、ユニット内でガバナの二次側にあまり距離を確保することが不可能である。
【0004】
従って整圧管はガバナユニット設置後、ここから少し離れた出口管の太径部分に接続するように現場で施工している。例えば、地上設置のガバナでは、図7に示すようにガバナユニットaの下方を掘削して、ガバナから適宜距離離れた個所において、整圧管bの先端を出口管cの上側に溶接して取り付けている。また地下設置のガバナでは、図8に示すように、ガバナユニットaを防護しているコンクリート壁dの更に外側を掘削して整圧管bの先端を出口管cの上側に溶接して取り付け、その上方には防護用の鉄板eを埋設している。尚、図中符号fはパイロット、符号gは入口管を示すものである。
【0005】
【発明が解決しようとする課題】
以上の従来技術では、次のような課題がある。
a.他事業者の工事等において整圧管を損傷される恐れがある。
b.整圧管の埋設部では腐食の発生の恐れがある。
c.地震等による地盤の変動で整圧管が損傷する恐れがある。
d.整圧管の設置工事に時間がかかる。
従って本発明は、これらの課題を解決することを目的とするものである。
【0006】
【課題を解決するための手段】
本発明では上記の課題を解決するために、ガバナの整圧管を、ガバナの防護箱内から外に延設した出口管内に挿入し、この出口管は、ガバナの防護箱内における上流側の等径部分と、偏心したレジューサを経て下流側の太径部分に連なる構成とし、且つ出口管内上部の管壁を、前記上流側の等径部分から下流側の太径部分に至るまで一線上に形成して、この一線上の上部管壁に沿って前記整圧管を支持する構成とし、前記整圧管の先端には、先端側を閉じ、横側に開口部を形成したキャップを装着したガバナの整圧管設置機構を提案する。
0007
そして、本発明では、上記の構成において、キャップの開口部の総開口面積を、整圧管の断面積よりも小さく形成することを提案する。
0008
また本発明では、上記の構成において、出口管及び整圧管は,レジュ−サ部よりも上流側で、防護箱から突出した個所において溶接により接続する構成とすることを提案する。
0009
このような構成においては、整圧管の先端をガバナの防護箱から離れた出口管の太径部内の適所まで至らせることにより、安定した二次側圧力を検知することができるにもかかわらず、整圧管は防護箱外においては出口管内に支持されているので、他の工事又は地震等における整圧管の損傷や腐食の発生を防止することができ、設置工事も容易となる。
0010
殊に、整圧管を上流側からレジュ−サ部を経た太径部分に渡って一線上に形成した出口管内上部管壁に支持する構成とすることにより、管内流速が大きくなった場合の整圧管の振動の発生を防止することができる。
0011
また整圧管の先端に、先端側を閉じ、横側に開口部を形成したキャップを装着することにより、二次側圧力の変動を抑制することができ、この抑制効果は、キャップの開口部の総開口面積を、整圧管の断面積よりも小さく形成することにより大きくすることができる。
0012
【発明の実施の形態】
次に本発明の実施の形態を図1〜図6を参照して説明する。
図1は本発明を適用したガバナ設備の構成の一例を概念的に示す系統図であり、この図は地下に設置したガバナ設備を地上側から見た状態、即ちガバナ設備を平面図的に表している。
符号1はガバナユニットであり、このガバナユニット1は、ガバナ2と共に、入口管3、入側バルブ4、出口管5、出側バルブ6、ボールバルブ7、Vポートバルブ8を設けたバイパス管9、整圧管10等の必要な装置類を鋼製箱11内に一体化して構成している。
0013
図2に示すように、ガバナユニット1において、出口管5及び整圧管10は鋼製箱11から適宜の寸法だけ突出させた構成とし、設置現場において溶接により埋設側のそれらと接合する構成としている。図示はしていないが入口管3についても同様である。尚、図においてガバナユニット1側の出口管と整圧管は夫々符号5a,10aで表し、これらと接合する埋設側の出口管と整圧管は夫々符号5b,10bで表している。
0014
整圧管10aはガバナユニット1の鋼製箱11内において出口管5a内に挿入し、挿入個所13を溶接により気密接合すると共に出口管5の上部の管壁に近接した位置に沿って配置し、先端は出口管5aの先端よりも内側に位置させている。そして整圧管10aの先端には整圧管10bを溶接により接合するためのソケット14を設けている。ソケット14と整圧管10bの先端には、溶接において整圧管10bを支持するために螺合部を形成することができる。
0015
図3,図4はガバナユニット1側の出口管5a及び整圧管10aと接合する出口管5b及び整圧管10bの構成を表したもので、出口管5bは、上流側の出口管5aに接合するために等しい径に形成した等径部分sと、これよりも太く形成した太径部分tと、これらの間を接続するレジュ−サ部分rとから構成している。レジュ−サ部分rは、等径部分sの中心軸と太径部分tの中心軸とを偏心させて形成していて、上部の管壁は、等径部分sからレジュ−サ部分rを経て太径部分tに至るまで一線上に形成されている。
0016
整圧管10bは、上述した一線上の上部の管壁に沿い、これに近接した状態で支持部材15により支持されている。図の支持部材15はリング状の構成で、整圧管10bを摺動可能に支持する構成としている。そして出口管5bの太径部分t側に位置する整圧管10bの先端にはキャップ16を装着している。キャップ16は、図6に最も明確に表れているように、先端側は閉じていて、横側にのみ開口部17を形成している。
0017
以上の構成のガバナユニット1を地下に設置する場合には、図5に示すように鋼製箱11を防護用のコンクリート箱12内に収納し、整圧管10bの先端を、整圧管10aの先端のソケット14に嵌合して溶接により接合した後、出口管5aと出口管5bの等径部の夫々の端部を溶接して設置作業を完了する。符号18が溶接個所を示す。
0018
以上の構成では、現場において整圧管の先端を出口管の横側に溶接により接合するという、従来必要であった難しい作業が不要となるので、熟練を必要とせず、設置の時間が短縮される。
0019
また以上の構成では、整圧管10は、先端がレジューサ部rから下流側に十分に離れた位置に支持することができるので、レジューサ部rにおける流体の乱れの影響をなくして整圧性能の向上を図ることができる。
0020
このような効果を有する上、整圧管10はコンクリート箱12外においては出口管5内に支持されるので、a.他事業者の工事等における損傷事故を防止することができる、b.直接に土と接触しないため腐食しにくい、c.地震等による損傷が防止できるというような効果を有する。
0021
また整圧管10は、出口管5aから、出口管5bのレジュ−サ部rを経た太径部分tに渡って、管壁に近接して支持されるので、出口管5内のガスの流速が大きくなっても振動の発生が防止される。
0022
以上のことから整圧管10の径は従来よりも細く、例えば半分程度の径とすることができ、大流量域等における出口管5b内の流体の圧力の変動に対する影響、例えばガバナの二次側圧力が大流量域付近において一時的に上昇する等の影響を低減して、ガバナの二次側圧力の変動を抑制することができる。整圧管10の先端に、先端側を閉じ、横側に開口部17を形成したキャップ16を装着すれば、圧力変動の影響を更に受けにくくなり、キャップ16の開口部17の総開口面積を整圧管5の断面積よりも小さく形成すれば最良の結果が得られる。
0023
尚、以上の実施の形態では、a.レジュ−サ部分rは、等径部分sの中心軸と太径部分tの中心軸とを偏心させて形成し、出口管5の上部の管壁は、等径部分sからレジュ−サ部分rを経て太径部分tに至るまで一線上に形成する点と、b.整圧管10の先端に、先端側を閉じ、横側に開口部17を形成したキャップ16を装着する点の両方を適用しているが、いずれか一方のみを適用することができるものである。
【図面の簡単な説明】
【図1】 本発明の整圧管設置機構を地下設置のガバナに適用したガバナ設備の構成の一例を概念的に示す平面図である。
【図2】 図1のガバナ設備を構成するガバナユニットの一部を示す説明図である。
【図3】 図1のガバナ設備を構成する埋設側の要素の一部を示す説明図である。
【図4】 図3のA−A断面図である。
【図5】 図1のガバナ設備を側面側から見た説明図である。
【図6】 図5の、整圧管の先端側を拡大した断面図である。
【図7】 地上設置のガバナにおける従来の整圧管設置機構の構成を概念的に示す説明図である。
【図8】 地下設置のガバナにおける従来の整圧管設置機構の構成を概念的に示す説明図である。
【符号の説明】
1 ガバナユニット
2 ガバナ
3 入口管
4 入側バルブ
5 出口管
6 出側バルブ
7 ボールバルブ
8 Vポートバルブ
9 バイパス管
10 整圧管
11 鋼製箱
12 コンクリート箱
13 挿入個所
14 ソケット
15 支持部材
16 キャップ
17 開口部
18 溶接個所
s 等径部
r レジュ−サ部
t 大径部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a governor pressure regulator installation mechanism in a city gas supply system or the like.
[0002]
[Prior art]
The pressure regulating pipe for detecting the secondary pressure in the governor is connected to the part where the pressure is stable, i.e., away from the main valve of the governor, and to the outlet pipe part having a large diameter through the reducer part. It is necessary to take out the pressure.
[0003]
On the other hand, the governor unit manufactured as standard at the factory, i.e., the devices required before and after the governor, such as input / output valves, filters, and shut-off valves, are unitized at the factory together with the governor. It is impossible to secure the distance too much.
[0004]
Therefore, after the governor unit is installed, the pressure regulating pipe is installed on site so as to be connected to the large diameter portion of the outlet pipe a little away from here. For example, in a governor installed on the ground, as shown in FIG. 7, the lower part of the governor unit a is excavated, and the tip of the pressure regulating tube b is welded and attached to the upper side of the outlet tube c at a location appropriately separated from the governor. Yes. Further, in the underground governor, as shown in FIG. 8, the outer side of the concrete wall d protecting the governor unit a is excavated, and the tip of the pressure regulating tube b is welded to the upper side of the outlet tube c and attached. A protective iron plate e is buried above. In the figure, symbol f indicates a pilot and symbol g indicates an inlet pipe.
[0005]
[Problems to be solved by the invention]
The above prior art has the following problems.
a. There is a risk that the pressure regulator will be damaged during the construction of other companies.
b. Corrosion may occur in the buried part of the pressure regulator.
c. There is a risk of damage to the pressure regulator tube due to ground changes caused by earthquakes.
d. It takes time to install the pressure regulator.
Therefore, an object of the present invention is to solve these problems.
[0006]
[Means for Solving the Problems]
In the present invention, in order to solve the above-described problem, a governor pressure regulating pipe is inserted into an outlet pipe extending outward from the governor's protective box, and the outlet pipe is connected to the upstream side of the governor's protective box. It is configured to be connected to the downstream large diameter portion via the diameter portion and the eccentric reducer, and the upper wall of the outlet pipe is formed in a line from the upstream equal diameter portion to the downstream large diameter portion. Then, the pressure regulating tube is supported along the upper tube wall on this line, and the tip of the pressure regulating tube is fitted with a cap that is fitted with a cap having a closed end and an opening formed on the lateral side. A pressure tube installation mechanism is proposed.
[ 0007 ]
And in this invention, in said structure, it proposes forming the total opening area of the opening part of a cap smaller than the cross-sectional area of a pressure regulation pipe | tube.
[ 0008 ]
According to the present invention, in the above-described configuration, it is proposed that the outlet pipe and the pressure regulating pipe are connected by welding at a location protruding from the protective box on the upstream side of the reducer portion.
[ 0009 ]
In such a configuration, although the tip of the pressure regulating tube is brought to an appropriate position in the large diameter portion of the outlet tube away from the protective box of the governor, a stable secondary pressure can be detected, Since the pressure regulating pipe is supported inside the outlet pipe outside the protective box, it is possible to prevent the pressure regulating pipe from being damaged or corroded in other works or earthquakes, and the installation work is facilitated.
[ 0010 ]
In particular, the pressure regulating tube when the flow velocity in the pipe is increased by supporting the pressure regulating pipe on the upper pipe wall in the outlet pipe formed in a line from the upstream side to the large diameter portion passing through the reducer portion. Generation of vibrations can be prevented.
[ 0011 ]
In addition, by attaching a cap that closes the distal end side and forms an opening on the lateral side to the distal end of the pressure regulating tube, it is possible to suppress fluctuations in the secondary side pressure. The total opening area can be increased by forming it smaller than the cross-sectional area of the pressure regulating tube.
[ 0012 ]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a system diagram conceptually showing an example of the configuration of a governor facility to which the present invention is applied. This figure shows a state in which a governor facility installed underground is viewed from the ground side, that is, the governor facility is shown in a plan view. ing.
Reference numeral 1 denotes a governor unit. The governor unit 1 includes a governor 2 and a bypass pipe 9 provided with an inlet pipe 3, an inlet side valve 4, an outlet pipe 5, an outlet side valve 6, a ball valve 7, and a V port valve 8. The necessary devices such as the pressure regulating tube 10 are integrated in the steel box 11.
[ 0013 ]
As shown in FIG. 2, in the governor unit 1, the outlet pipe 5 and the pressure regulating pipe 10 are configured to protrude from the steel box 11 by appropriate dimensions, and are configured to be joined to those on the buried side by welding at the installation site. . The same applies to the inlet pipe 3 although not shown. In the figure, the outlet pipe and pressure regulating pipe on the governor unit 1 side are represented by reference numerals 5a and 10a, respectively, and the outlet pipe and pressure regulating pipe on the buried side joined thereto are represented by reference numerals 5b and 10b, respectively.
[ 0014 ]
The pressure regulating pipe 10a is inserted into the outlet pipe 5a in the steel box 11 of the governor unit 1, and the insertion portion 13 is hermetically joined by welding and arranged along a position close to the upper pipe wall of the outlet pipe 5, The tip is positioned inside the tip of the outlet pipe 5a. And the socket 14 for joining the pressure regulation pipe | tube 10b by welding is provided in the front-end | tip of the pressure regulation pipe | tube 10a. A threaded portion can be formed at the tip of the socket 14 and the pressure regulating tube 10b in order to support the pressure regulating tube 10b in welding.
[ 0015 ]
3 and 4 show the configuration of the outlet pipe 5b and the pressure regulating pipe 10b joined to the outlet pipe 5a and the pressure regulating pipe 10a on the governor unit 1 side. The outlet pipe 5b is joined to the upstream outlet pipe 5a. For this reason, it is composed of an equal-diameter portion s formed to have the same diameter, a thick-diameter portion t formed thicker than this, and a reducer portion r connecting between them. The reducer portion r is formed by decentering the central axis of the equal-diameter portion s and the central axis of the large-diameter portion t, and the upper tube wall extends from the equal-diameter portion s through the reducer portion r. It is formed on one line up to the large diameter portion t.
[ 0016 ]
The pressure regulating tube 10b is supported by the support member 15 along the upper tube wall on the above-mentioned line and in the vicinity thereof. The support member 15 shown in the figure has a ring-like configuration and is configured to support the pressure regulating tube 10b so as to be slidable. A cap 16 is attached to the tip of the pressure regulating tube 10b located on the large diameter portion t side of the outlet tube 5b. As shown most clearly in FIG. 6, the cap 16 is closed on the tip side and has an opening 17 only on the lateral side.
[ 0017 ]
When the governor unit 1 having the above configuration is installed underground, the steel box 11 is housed in a protective concrete box 12 as shown in FIG. 5, and the tip of the pressure regulating tube 10b is connected to the tip of the pressure regulating tube 10a. After being fitted to the socket 14 and joined by welding, the ends of the equal diameter portions of the outlet pipe 5a and the outlet pipe 5b are welded to complete the installation operation. Reference numeral 18 indicates a welding point.
[ 0018 ]
With the above configuration, since the difficult work that has been necessary in the past, such as welding the tip of the pressure regulating pipe to the side of the outlet pipe at the site, is not required, skill is not required, and installation time is shortened. .
[ 0019 ]
Further, in the above configuration, the pressure regulating tube 10 can be supported at a position where the tip is sufficiently separated from the reducer portion r on the downstream side, so that the effect of fluid disturbance in the reducer portion r is eliminated and the pressure regulating performance is improved. Can be achieved.
[ 0020 ]
In addition to having such an effect, the pressure regulating pipe 10 is supported inside the outlet pipe 5 outside the concrete box 12, so that a. Can prevent damage accidents during construction of other companies, b. Since it is not in direct contact with soil, it is difficult to corrode, c. It has the effect of preventing damage due to earthquakes and the like.
[ 0021 ]
Further, since the pressure regulating tube 10 is supported in the vicinity of the tube wall from the outlet tube 5a to the large-diameter portion t passing through the reducer portion r of the outlet tube 5b, the flow rate of the gas in the outlet tube 5 is increased. Generation of vibration is prevented even when the size is increased.
[ 0022 ]
From the above, the diameter of the pressure regulating pipe 10 is thinner than that of the conventional one, and can be, for example, about half the diameter. The influence on the fluctuation of the pressure of the fluid in the outlet pipe 5b in a large flow rate region, for example, the secondary side of the governor The influence of the pressure rising temporarily in the vicinity of the large flow rate region can be reduced, and the fluctuation of the secondary pressure of the governor can be suppressed. If the cap 16 with the distal end closed and the lateral opening 17 formed at the distal end of the pressure regulating tube 10 is attached, it is less susceptible to pressure fluctuations, and the total opening area of the opening 17 of the cap 16 is adjusted. The best results can be obtained if it is formed smaller than the cross-sectional area of the pressure tube 5.
[ 0023 ]
In the above embodiment, a. The reducer portion r is formed by decentering the central axis of the equal diameter portion s and the central axis of the large diameter portion t, and the upper pipe wall of the outlet pipe 5 extends from the equal diameter portion s to the reducer portion r. And a point formed on a line until reaching the large-diameter portion t through b. Both the point of closing the tip side of the pressure regulating tube 10 and attaching the cap 16 having the opening 17 formed on the lateral side are applied, but only one of them can be applied.
[Brief description of the drawings]
FIG. 1 is a plan view conceptually showing an example of a configuration of a governor facility in which a pressure regulating tube installation mechanism of the present invention is applied to an underground governor.
FIG. 2 is an explanatory view showing a part of a governor unit constituting the governor facility of FIG. 1;
FIG. 3 is an explanatory diagram showing a part of an element on the burial side that constitutes the governor facility of FIG. 1;
4 is a cross-sectional view taken along the line AA in FIG.
FIG. 5 is an explanatory view of the governor facility of FIG. 1 as viewed from the side.
6 is an enlarged cross-sectional view of the distal end side of the pressure regulating tube in FIG. 5;
FIG. 7 is an explanatory view conceptually showing the configuration of a conventional pressure regulating tube installation mechanism in a ground-mounted governor.
FIG. 8 is an explanatory diagram conceptually showing the structure of a conventional pressure regulating pipe installation mechanism in an underground installation governor.
[Explanation of symbols]
1 Governor Unit 2 Governor 3 Inlet Pipe 4 Inlet Valve 5 Outlet Pipe 6 Outlet Valve 7 Ball Valve 8 V Port Valve 9 Bypass Pipe 10 Pressure Regulator 11 Steel Box 12 Concrete Box 13 Insertion Point 14 Socket 15 Supporting Member 16 Cap 17 Opening 18 Welding point s Equal diameter r Reducer t Large diameter

Claims (3)

ガバナの整圧管を、ガバナの防護箱内から外に延設した出口管内に挿入し、この出口管は、ガバナの防護箱内における上流側の等径部分と、偏心したレジューサを経て下流側の太径部分に連なる構成とし、且つ出口管内上部の管壁を、前記上流側の等径部分から下流側の太径部分に至るまで一線上に形成して、この一線上の上部管壁に沿って前記整圧管を支持する構成とし、前記整圧管の先端には、先端側を閉じ、横側に開口部を形成したキャップを装着したことを特徴とするガバナの整圧管設置機構The governor pressure regulating tube is inserted into an outlet pipe extending outward from the governor's protective box, and this outlet pipe is connected to the upstream side of the governor's protective box through an eccentric reducer. The pipe wall of the upper part in the outlet pipe is formed on a single line from the upstream-side equal-diameter part to the downstream-side thick-diameter part, and extends along the upper pipe wall on this line. And a pressure regulating pipe installation mechanism for a governor, wherein the pressure regulating pipe is configured to support the pressure regulating pipe, and a cap having a distal end side closed and a lateral opening formed is attached to a distal end of the pressure regulating pipe. キャップの開口部の総開口面積を、整圧管の断面積よりも小さく形成したことを特徴とする請求項1記載のガバナの整圧管設置機構2. The governor pressure regulating tube installation mechanism according to claim 1 , wherein the total opening area of the opening of the cap is smaller than the cross-sectional area of the pressure regulating tube. 出口管及び整圧管は,レジュ−サ部よりも上流側で、防護箱から突出した個所において溶接により接続する構成としたことを特徴とする請求項1,2記載のガバナの整圧管設置機構The governor pressure regulating pipe installation mechanism according to claim 1 or 2 , wherein the outlet pipe and the pressure regulating pipe are connected by welding at a location protruding from the protective box, upstream of the reducer portion.
JP04765396A 1996-03-05 1996-03-05 Governor pressure regulator installation mechanism Expired - Fee Related JP3682735B2 (en)

Priority Applications (1)

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JP04765396A JP3682735B2 (en) 1996-03-05 1996-03-05 Governor pressure regulator installation mechanism

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Application Number Priority Date Filing Date Title
JP04765396A JP3682735B2 (en) 1996-03-05 1996-03-05 Governor pressure regulator installation mechanism

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JPH09242998A JPH09242998A (en) 1997-09-16
JP3682735B2 true JP3682735B2 (en) 2005-08-10

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8336574B2 (en) * 2007-04-20 2012-12-25 Fisher Controls International Llc Pressure averaging sense tube for gas regulator
CN103711981B (en) * 2012-10-01 2018-07-24 艾默生过程管理调节技术公司 The dynamic pressure recording device and over-pressure safety device of actuator for internal record

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