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JP2969514B2 - Mounting structure of sensor for fluid measurement - Google Patents

Mounting structure of sensor for fluid measurement

Info

Publication number
JP2969514B2
JP2969514B2 JP23085797A JP23085797A JP2969514B2 JP 2969514 B2 JP2969514 B2 JP 2969514B2 JP 23085797 A JP23085797 A JP 23085797A JP 23085797 A JP23085797 A JP 23085797A JP 2969514 B2 JP2969514 B2 JP 2969514B2
Authority
JP
Japan
Prior art keywords
cylindrical
seal portion
seal
fluid
sensor
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
Application number
JP23085797A
Other languages
Japanese (ja)
Other versions
JPH1164048A (en
Inventor
清志 西尾
裕 岡元
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.)
Nippon Pillar Packing Co Ltd
Original Assignee
Nippon Pillar Packing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Pillar Packing Co Ltd filed Critical Nippon Pillar Packing Co Ltd
Priority to JP23085797A priority Critical patent/JP2969514B2/en
Publication of JPH1164048A publication Critical patent/JPH1164048A/en
Application granted granted Critical
Publication of JP2969514B2 publication Critical patent/JP2969514B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Measuring Fluid Pressure (AREA)
  • Details Of Measuring And Other Instruments (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、例えば薬液等の流
体圧力を計測する圧力センサーや流体の汚染度を計測す
る光センサー、流体温度を計測する温度センサーなどの
各種流体計測用センサーを流体配管系に取付けるための
構造に関するもので、詳しくは、流体配管系の一部を構
成するティなどの管継手に上記の如きセンサーを内蔵さ
せる流体計測用センサーの取付構造に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variety of fluid measurement sensors such as a pressure sensor for measuring a fluid pressure of a chemical solution, an optical sensor for measuring the degree of contamination of a fluid, and a temperature sensor for measuring a fluid temperature. The present invention relates to a structure for mounting on a system, and more particularly, to a mounting structure for a fluid measurement sensor in which the above-described sensor is incorporated in a pipe joint such as a tee forming a part of a fluid piping system.

【0002】[0002]

【従来の技術】流体配管系の一部を構成するティなどの
管継手に圧力センサーなどの流体計測用センサーを内蔵
させる取付構造として、従来、例えば特開平9−166
512号公報に開示されているように、継手本体の開口
端部を封止する蓋体にセンサーを装着し、このセンサー
を内蔵するフッ素樹脂製の筒状センサーケースを管継手
本体の端部内壁に嵌着させるとともに、管継手本体の外
壁部に螺合させた押輪の螺進により上記蓋体およびセン
サーケースを管継手本体に固定してなるものが提案され
ている。
2. Description of the Related Art Conventionally, as a mounting structure in which a fluid measuring sensor such as a pressure sensor is incorporated in a pipe joint such as a tee forming a part of a fluid piping system, for example, Japanese Patent Application Laid-Open No. 9-166 is disclosed.
As disclosed in Japanese Patent Publication No. 512, a sensor is mounted on a lid for sealing an open end of a joint body, and a fluororesin cylindrical sensor case containing the sensor is attached to an inner wall of an end of the pipe joint body. And fixing the lid and the sensor case to the pipe joint body by screwing a push ring screwed into the outer wall of the pipe joint body.

【0003】[0003]

【発明が解決しようとする課題】上記した従来のセンサ
ー取付構造においては、センサーが流体配管系の一部を
構成する管継手本体自体に内蔵されるものであるため
に、センサーを流体配管に取付けるための特殊な装置を
付加する必要がなく、センサー設置コストの低減が図れ
るとともに、センサーの保守や点検、交換などメンテナ
ンスのための取付け、取り外しも容易であり、また、セ
ンサーがフッ素樹脂製の筒状センサーケースに内蔵され
ていることから、薬液のような腐食性の強い流体であっ
ても、該センサーを腐食から保護し、さらに、さらに流
体の流れを阻害するような不要な介在物がないので、流
体溜まりの発生もなく流体のスムーズな流れを保つこと
が可能である。
In the above-described conventional sensor mounting structure, the sensor is mounted on the fluid pipe because the sensor is built in the pipe joint body itself which constitutes a part of the fluid pipe system. It is not necessary to add any special equipment to reduce the sensor installation cost, and it is easy to install and remove the sensor for maintenance such as maintenance, inspection, and replacement. Since it is built into the sensor case, even if it is a highly corrosive fluid such as a chemical solution, it protects the sensor from corrosion, and furthermore, there is no unnecessary inclusion that obstructs the flow of the fluid. Therefore, it is possible to maintain a smooth flow of the fluid without generating a fluid pool.

【0004】しかしながら、上記した従来のセンサー取
付構造では、筒状センサーケースが直接に管継手本体の
端部内壁に嵌着し固定されたものであるから、高温流体
や温度変動が激しい流体の流通によって筒状センサーケ
ースにクリープや応力緩和が生じたような場合、該セン
サーケースと管継手本体との間に微小な隙間が発生し、
その隙間を通って流体が漏洩したり、流体が滞留したり
するといったように、シール性能に大きな難点があり、
したがって、薬液のように腐食性が強くて外部への漏洩
があると周囲に多大な不都合を及ぼし、かつ圧力などの
計測値にも誤差を生じる可能性のある流体を計測対象と
する場合のセンサーの取付構造としては不適当なもので
あった。
However, in the above-mentioned conventional sensor mounting structure, since the cylindrical sensor case is directly fitted to and fixed to the inner wall at the end of the pipe joint body, the flow of a high-temperature fluid or a fluid having a large temperature fluctuation is circulated. When creep or stress relaxation occurs in the cylindrical sensor case due to, a small gap is generated between the sensor case and the fitting body,
There is a great difficulty in sealing performance, such as leakage of fluid through the gap or retention of fluid.
Therefore, a sensor that measures fluids that are highly corrosive, such as chemicals, and can cause significant inconvenience to the surroundings if leaked to the outside, and that may cause errors in measured values such as pressure. Was unsuitable as a mounting structure.

【0005】本発明は上記実情に鑑みてなされたもの
で、管継手本体自体にセンサーを内蔵することによるコ
ストの低減、メンテナンスの容易性およびセンサーの保
護機能を保ちつつ、高温流体や温度変動が激しい流体で
あっても、優れたシール性能を確保して所定の計測を精
度よく達成することができる流体計測用センサーの取付
構造を提供することを目的としている。
[0005] The present invention has been made in view of the above-mentioned circumstances, and reduces the cost by incorporating a sensor in the pipe joint body itself, simplifies maintenance, and maintains the function of protecting the sensor. It is an object of the present invention to provide a mounting structure for a fluid measurement sensor capable of ensuring excellent sealing performance and achieving a predetermined measurement with high accuracy even for a severe fluid.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するため
に、請求項1に記載の発明に係る流体計測用センサーの
取付構造は、端部に筒状の受口を有し、この受口の少な
くとも入口部に該受口の軸線に対して交差状のシール部
が形成されている管継手本体と、この管継手本体の上記
筒状受口内に挿入可能で、その挿入状態において上記シ
ール部に当接するシール部を有する筒状シール部材と、
流体計測用センサーを内蔵し、上記筒状シール部材内に
嵌合可能な樹脂製のセンサーケースと、上記継手本体の
端部に螺合し、螺進により上記筒状シール部材を上記セ
ンサーケースの外側から押圧して該筒状シール部材側の
シール部と上記受口側のシール部とに密封力を与える押
輪とを具備したことを特徴とするものである。
In order to achieve the above object, a mounting structure for a fluid measuring sensor according to the present invention has a cylindrical receiving end at an end thereof. A pipe joint body in which at least an inlet portion has a seal portion crossing the axis of the socket, and a sealable portion that can be inserted into the tubular socket of the pipe joint body and in the inserted state. A cylindrical seal member having a seal portion abutting on
A built-in fluid measurement sensor, a resin sensor case that can be fitted into the cylindrical seal member, and screwed into an end of the joint body, screwing the cylindrical seal member to the sensor case. And a pressing ring that presses from the outside to apply a sealing force to the sealing portion on the cylindrical sealing member side and the sealing portion on the receiving side.

【0007】上記のような構成を有する請求項1に記載
の発明によれば、管継手本体の端部に螺合させた押輪の
螺進によって、管継手本体の筒状受口側のシール部と該
筒状受口内に挿入された筒状シール部材側のシール部と
に強い密封力が与えられることになるので、管継手本体
とセンサーケースとの間のシール性能を高く保持するこ
とが可能である。このように優れたシール性能が確保さ
れた状態で管継手本体の受口に挿入設置された筒状シー
ル部材内に流体センサーを内蔵した樹脂製のセンサーケ
ースを嵌合させることにより、センサー設置コストの低
減が図れるとともに、センサーの保守や点検、交換など
メンテナンスのための取付け、取り外しも容易であり、
また、薬液のような腐食性の強い流体であっても、該セ
ンサーを腐食から保護することができると同時に、流体
の漏洩に伴う周囲への悪影響および計測誤差の発生を回
避することができる。
According to the first aspect of the present invention having the above-described structure, the sealing portion on the tubular receiving side of the pipe joint body is screwed by the push ring screwed into the end of the pipe joint body. And a sealing portion on the side of the cylindrical sealing member inserted into the cylindrical receiving port, a strong sealing force is applied, so that the sealing performance between the pipe joint body and the sensor case can be kept high. It is. By fitting a resin sensor case with a built-in fluid sensor into a cylindrical seal member inserted and installed in the socket of the fitting body with such excellent sealing performance secured, the sensor installation cost is reduced. And easy installation and removal for maintenance such as maintenance, inspection, and replacement of the sensor.
Further, even with a highly corrosive fluid such as a chemical solution, the sensor can be protected from corrosion, and at the same time, adverse effects on the surroundings due to leakage of the fluid and occurrence of measurement errors can be avoided.

【0008】また、請求項2に記載の発明に係る流体計
測用センサーの取付構造は、端部に筒状の受口を有し、
この受口の奥部に一次シール部が形成されているととも
に、入口部に該受口の軸線に対して交差状の二次シール
部が形成されている管継手本体と、この管継手本体の上
記筒状受口内に挿入可能で、その挿入状態において上記
一次シール部に当接する内端シール部および上記二次シ
ール部に当接する外端側シール部を有する筒状シール部
材と、流体計測用センサーを内蔵し、上記筒状シール部
材内に嵌合可能な樹脂製のセンサーケースと、上記継手
本体の端部に螺合し、螺進により上記筒状シール部材を
上記センサーケースの外側から押圧して該筒状シール部
材の内端シール部および外端側シール部と上記受口の一
次シール部および二次シール部に密封力を与える押輪と
を具備したことを特徴とするものである。
The mounting structure for a fluid measurement sensor according to the second aspect of the present invention has a cylindrical receiving port at an end,
A pipe joint body in which a primary seal portion is formed in a deep portion of the socket, and a secondary seal portion crossing the axis of the port is formed in an inlet portion; A cylindrical seal member that can be inserted into the cylindrical receptacle and has an inner end seal portion abutting on the primary seal portion and an outer end side seal portion abutting on the secondary seal portion in the inserted state; A resin sensor case which has a built-in sensor and can be fitted into the cylindrical seal member, and is screwed to the end of the joint body, and the cylindrical seal member is pressed from the outside of the sensor case by screwing. The cylindrical seal member further includes an inner end seal portion and an outer end side seal portion, and a pressing ring for applying a sealing force to the primary seal portion and the secondary seal portion of the receiving port.

【0009】上記のような構成を有する請求項2に記載
の発明によれば、管継手本体の端部に螺合させた押輪の
螺進によって、管継手本体の一次シール部および二次シ
ール部と管継手本体の筒状受口内に挿入させて筒状シー
ル部材の内端シール部および外端側シール部とにそれぞ
れ強い密封力が与えられて管継手本体とセンサーケース
との間のシール性能を高く保持するとともに、筒状シー
ル部材が押輪と管継手本体の一次シール部とによって軸
方向の両側から強く挟着保持されて管継手本体内を流通
する流体が高温流体や温度変動の激しい流体であって
も、筒状シール部材のクリープや応力緩和を抑制するこ
とが可能である。このように優れたシール性能および耐
クリープ性が確保された状態で管継手本体に取付けられ
た筒状シール部材内に流体センサーを内蔵した樹脂製の
センサーケースを嵌合させることにより、センサー設置
コストの低減、センサーの保守や点検、交換などのメン
テナンスのための取付け、取り外しの容易化が図れるだ
けでなく、薬液のような腐食性の強い流体であっても、
該センサーを腐食から保護することができると同時に、
流体の漏洩に伴う周囲への悪影響および計測誤差の発生
を回避することができる。
According to the second aspect of the present invention having the above-described structure, the primary seal portion and the secondary seal portion of the pipe joint body are screwed by the push ring screwed to the end of the pipe joint body. And the inner end seal portion and the outer end side seal portion of the cylindrical seal member are respectively provided with a strong sealing force by being inserted into the cylindrical socket of the pipe joint body, thereby providing a sealing performance between the pipe joint body and the sensor case. And the cylindrical seal member is strongly pinched and held from both sides in the axial direction by the press ring and the primary seal portion of the pipe joint body, and the fluid flowing through the pipe joint body is a high-temperature fluid or a fluid with severe temperature fluctuation. Even in this case, it is possible to suppress creep and stress relaxation of the cylindrical seal member. By fitting a resin sensor case with a built-in fluid sensor into a tubular seal member attached to the fitting body with such excellent sealing performance and creep resistance secured, the sensor installation cost is reduced. In addition to reducing the number of sensors and facilitating installation and removal for maintenance such as sensor maintenance, inspection and replacement, even for highly corrosive fluids such as chemicals,
While protecting the sensor from corrosion,
It is possible to avoid adverse effects on the surroundings due to leakage of the fluid and occurrence of measurement errors.

【0010】上記請求項2に記載の発明に係る流体計測
用センサーの取付構造において、上記筒状受口の奥部の
一次シール部および上記筒状シール部材の内端シール部
として、請求項3に記載のように、受口の軸線に対して
上記二次シール部とは逆向きの交差状に形成する、ある
いは、請求項4に記載のように、受口の軸線に対して交
差する内側シール部分と受口の軸線に沿って深く嵌合す
る外側シール部分との二段階シール部に形成することに
よって、流体の漏洩防止機能(シール性能)を一層高め
て、特に圧力の計測精度を向上することが可能である。
In the mounting structure for a fluid measuring sensor according to the second aspect of the present invention, the primary sealing portion at the inner portion of the cylindrical receiving portion and the inner end sealing portion of the cylindrical sealing member may be used. As described in (4), the secondary seal portion is formed in a crossing direction opposite to the axis of the receiving port, or as described in (4), an inner side crossing with the axis of the receiving port. By forming a two-stage seal part with a seal part and an outer seal part that fits deeply along the axis of the receptacle, the function of preventing fluid leakage (seal performance) is further enhanced, and pressure measurement accuracy is particularly improved. It is possible to

【0011】また、管継手本体内を流通する流体と接触
する上記センサーケースを請求項5に記載のように、フ
ッ素樹脂から形成することによって、流体が腐食性の強
い薬液であっても、該センサケースの腐食および薬液の
汚染を防止することが可能である。
Further, by forming the sensor case, which is in contact with the fluid flowing through the inside of the pipe joint body, from a fluororesin, even if the fluid is a highly corrosive chemical, It is possible to prevent corrosion of the sensor case and contamination of the chemical solution.

【0012】[0012]

【発明の実施の形態】以下、本発明の実施の形態を図面
にもとづいて説明する。図1は本発明に係る流体計測用
センサーの一例である圧力センサーの取付構造の第1の
実施形態を示す縦断面図であり、同図において、1はテ
ィと呼称される樹脂製の管継手で、この管継手1は、た
とえばPFA,PTFE,CTFF等の耐薬品性および
耐熱性に優れた特性を有するフッ素樹脂によって形成さ
れ、二つの流体管2,2を直線的に接続するために直線
状管部5Aの左右両端部に筒状の受口3,3を有すると
ともに、上記直線状管部5Aの軸線方向の中央部から上
方に向けて一体に突出させた立上り管部5Bの端部に筒
状の受口4を有する管継手本体5と該管継手本体5の三
つの筒状受口3,3および4内に挿入される筒状シール
部材6,6および7と三つの押輪8,8および9とから
構成されている。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a first embodiment of a mounting structure of a pressure sensor which is an example of a sensor for measuring fluid according to the present invention. In FIG. 1, reference numeral 1 denotes a resin pipe joint called a tee. The pipe joint 1 is formed of a fluororesin having excellent properties such as chemical resistance and heat resistance such as PFA, PTFE, and CTFF, and has a straight line for connecting the two fluid pipes 2 and 2 linearly. Ends of a rising pipe portion 5B having cylindrical receiving ports 3, 3 at both left and right ends of the tubular portion 5A and integrally projecting upward from an axial center of the linear tubular portion 5A. A pipe joint body 5 having a cylindrical socket 4 therein, cylindrical seal members 6, 6 and 7 inserted into the three cylindrical sockets 3, 3 and 4 of the pipe joint body 5, and three pressing rings 8 , 8 and 9.

【0013】上記管継手本体5における各筒状受口3,
3および4の奥部には該受口3,3および4の軸線C1
およびC2に対して交差状、つまり軸線方向の外方に向
けて漸次縮径するテーパ面からなる一次シール部10,
10および11が形成されているとともに、各筒状受口
3,3および4の入口部には上記軸線C1およびC2に
対して上記一次シール部10,10および11とは逆向
きの交差状、つまり軸線方向の外方に向けて漸次拡径す
るテーパ面からなる二次シール部12,12および13
が形成されており、また、上記各受口3,3および4の
外周にはそれぞれ雄ねじ部14,14および15が形成
されている。
Each of the tubular sockets 3 in the pipe joint body 5
At the back of 3 and 4, the axis C1 of the sockets 3, 3 and 4
And C2, the primary seal portion 10 having a tapered surface whose diameter gradually decreases outward in the axial direction.
10 and 11 are formed, and the entrances of the respective cylindrical sockets 3, 3 and 4 are crossed in the direction opposite to the primary seals 10, 10 and 11 with respect to the axes C1 and C2, In other words, the secondary seal portions 12, 12, and 13 each having a tapered surface whose diameter gradually increases outward in the axial direction.
Are formed on the outer periphery of the receiving ports 3, 3 and 4, respectively.

【0014】上記筒状シール部材6は、その内端部に上
記筒状受口3に嵌合する外径の嵌合部16が形成されて
いるとともに、この嵌合部16との接続部近傍が流体管
2の肉厚相当分だけ小さい外径の圧入部17が嵌合部1
6に連続して形成されて全体がスリーブ状になってい
る。この筒状シール部材6の内周は流体管2の内周およ
び管継手本体5の直線状管部5Aの内周と同径で流体の
流動を妨げないように形成されている。また、この筒状
シール部材6の内端部には上記一次シール部10に当接
するテーパ面からなる内端シール部18が形成されてい
るとともに、外端部外周、すなわち上記圧入部17の外
周には、外端から軸線方向内端側に向けて漸次拡径し、
かつ外端が筒状シール部材6の内周と交差するテーパ状
の外端側シール部19が形成されており、この外端側シ
ール部19の頂部の径は上記嵌合部16の外径よりも大
きく設定されている。すなわち、この外端側シール部1
9の大径側が筒状シール部材6の外端部側外周面の断面
山形の膨出部20を形成しており、この膨出部20の頂
部から筒状シール部材6の内端側へ漸次縮径するテーパ
面23はその傾斜角度が上記管継手本体5に二次シール
部12の傾斜角度と一致するとともに、内端シール部1
8が上記管継手本体5の一次シール部10に当接したと
き、二次シール部12とテーパ面23との対向間隔が流
体管2の肉厚に相当する間隔になるように形成されてい
る。
The cylindrical seal member 6 has a fitting portion 16 having an outer diameter fitted to the tubular receiving port 3 at an inner end thereof, and a vicinity of a connecting portion with the fitting portion 16. The press-fit portion 17 having an outer diameter smaller by the thickness of the fluid pipe 2 corresponds to the fitting portion 1.
6 is formed in a sleeve shape as a whole. The inner circumference of the cylindrical seal member 6 has the same diameter as the inner circumference of the fluid pipe 2 and the inner circumference of the straight pipe portion 5A of the pipe joint body 5, and is formed so as not to obstruct the flow of the fluid. In addition, an inner end seal portion 18 formed of a tapered surface that comes into contact with the primary seal portion 10 is formed at an inner end portion of the cylindrical seal member 6, and an outer periphery of the outer end portion, that is, an outer periphery of the press-fit portion 17. The diameter gradually increases from the outer end toward the inner end in the axial direction.
Further, a tapered outer end side seal portion 19 whose outer end intersects the inner periphery of the cylindrical seal member 6 is formed, and the diameter of the top portion of the outer end side seal portion 19 is the outer diameter of the fitting portion 16. It is set larger than. That is, the outer end side seal portion 1
The large-diameter side of 9 forms a bulged portion 20 having a mountain-shaped cross section on the outer peripheral surface on the outer end side of the cylindrical seal member 6, and gradually from the top of the bulged portion 20 to the inner end side of the cylindrical seal member 6. The inclination angle of the tapered surface 23 whose diameter is reduced coincides with the inclination angle of the secondary seal portion 12 in the pipe joint body 5 and the inner end seal portion 1 is formed.
When the pipe 8 comes into contact with the primary seal portion 10 of the pipe joint body 5, the opposed interval between the secondary seal portion 12 and the tapered surface 23 is formed to be an interval corresponding to the thickness of the fluid pipe 2. .

【0015】上記のような構成の筒状シール部材6は、
図2に明示するように、上記圧入部17を流体管2の一
端部に圧入して、該流体管2の一端部周壁を拡径させ、
かつ、筒状シール部材6の嵌合部16を流体管2の一端
部から突出させることで流体管2と一体結合される。こ
のとき、流体管2の周壁拡径部が管継手本体5の受口3
に押し込まれる押し込み部21となる。また、この押し
込み部21が受口3に押し込まれた状態では、内端シー
ル部18が管継手本体5の一次シール部10に当接して
いるとともに、外端側シール部19が押し込み部21の
傾斜部22の内面に当接している。さらに、管継手本体
5の二次シール部12と筒状シール部材6のテーパ面2
3の間に流体管2の一端部が傾斜状態に挟持され、これ
によって、流体管2の周壁拡径部が管継手本体5の受口
3に押し込まれた状態では、筒状シール部材6のテーパ
面23に沿って変形した流体管2の外周面が管継手本体
5の二次シール部12に当接する。
The cylindrical sealing member 6 having the above-described structure is
As shown in FIG. 2, the press-fitting portion 17 is press-fitted into one end of the fluid pipe 2 to expand the peripheral wall of one end of the fluid pipe 2,
Further, the fitting portion 16 of the cylindrical seal member 6 is integrally connected to the fluid pipe 2 by protruding from the one end of the fluid pipe 2. At this time, the enlarged diameter portion of the peripheral wall of the fluid pipe 2 is
The pressing portion 21 is pressed into the pressing portion 21. In a state where the pushing portion 21 is pushed into the receiving port 3, the inner end seal portion 18 is in contact with the primary seal portion 10 of the pipe joint body 5, and the outer end side seal portion 19 is in contact with the pushing portion 21. It is in contact with the inner surface of the inclined portion 22. Further, the secondary seal portion 12 of the pipe joint body 5 and the tapered surface 2 of the cylindrical seal member 6 are formed.
3, one end of the fluid pipe 2 is sandwiched in an inclined state, and when the peripheral wall enlarged diameter portion of the fluid pipe 2 is pushed into the receiving port 3 of the pipe joint body 5, the cylindrical seal member 6 is closed. The outer peripheral surface of the fluid pipe 2 deformed along the tapered surface 23 contacts the secondary seal portion 12 of the pipe joint body 5.

【0016】一方、上記筒状シール部材7は、図3に明
示するように、その内端部に上記受口4の一次シール部
11に当接するテーパ面からなる内端シール部24が形
成されているとともに、外端部近くの外周には、外端側
から軸線方向内端側に向けて漸次縮径して上記受口4の
二次シール部13に当接するテーパ面からなる外端側シ
ール部25が形成されている。また、この筒状シール部
材7の内端部には上記内端シール部24の内周に連ねて
流体圧に応じ変形する薄肉部分26が形成されている。
そして、この筒状シール部材7内には圧力センサー27
を内蔵したフッ素樹脂製のセンサーケース28が嵌合さ
れており、このセンサーケース28の外端寄り外周部に
は上記筒状シール部材7の外端面の外径とほぼ同径の鍔
部29が一体に突出形成されている。
On the other hand, as shown in FIG. 3, the cylindrical seal member 7 is formed at its inner end with an inner end seal portion 24 having a tapered surface which comes into contact with the primary seal portion 11 of the receiving port 4. The outer end near the outer end has a tapered surface that gradually decreases in diameter from the outer end toward the inner end in the axial direction and abuts against the secondary seal portion 13 of the receptacle 4. A seal portion 25 is formed. At the inner end of the cylindrical seal member 7, a thin portion 26 that is deformed in accordance with fluid pressure is formed in connection with the inner periphery of the inner end seal portion 24.
A pressure sensor 27 is provided in the cylindrical seal member 7.
A sensor case 28 made of a fluororesin containing therein is fitted. A flange 29 having substantially the same diameter as the outer diameter of the outer end surface of the cylindrical sealing member 7 is provided on the outer peripheral portion near the outer end of the sensor case 28. They are integrally formed to protrude.

【0017】上記押輪8および9は、円筒状部30の内
周面に上記管継手本体5における各受口3および4の外
周にそれぞれ形成された雄ねじ部14および15に螺合
可能な雌ねじ部31および32が形成されているととも
に、外端部に軸心側に延出した環状の押圧片33および
34が一体形成されており、この環状の押圧片33およ
び34の内面側内端に押圧エッジ部35および36が形
成されている。
The push rings 8 and 9 are female screw portions which can be screwed into male screw portions 14 and 15 formed on the inner peripheral surface of the cylindrical portion 30 on the outer periphery of each of the sockets 3 and 4 in the pipe joint body 5 respectively. 31 and 32 are formed, and annular pressing pieces 33 and 34 extending toward the axial center are integrally formed at the outer ends, and pressing is performed on the inner end of the annular pressing pieces 33 and 34 on the inner surface side. Edge portions 35 and 36 are formed.

【0018】次に、上記のような構成部材を備えた管継
手1を用いて二つの流体管2,2を接続する作業および
圧力センサー27を取付ける作業について説明する。ま
ず、筒状シール部材6の圧入部17を各流体管2の一端
部に圧入させることにより、流体管2の一端部を全体的
に拡径させるとともに、筒状シール部材6の膨出部20
に対応する部分にさらに拡径した押し込み部21を形成
させる。このようにして形成した流体管2の一端押し込
み部21を管継手1における直線状管部5Aの左右両端
の筒状受口3にそれぞれ挿入して、内端シール部18を
管継手本体5の一次シール部10に当接させるととも
に、筒状シール部材6のテーパ面23に沿って変形した
流体管2の外周面を管継手本体5の二次シール部12に
当接させる。
Next, an operation for connecting the two fluid pipes 2 and 2 and an operation for installing the pressure sensor 27 using the pipe joint 1 having the above-described components will be described. First, the press-fitting portion 17 of the cylindrical seal member 6 is press-fitted into one end of each fluid pipe 2 so that the diameter of the one end of the fluid pipe 2 is increased as a whole, and the bulging portion 20 of the cylindrical seal member 6 is enlarged.
Is formed at the portion corresponding to the above. The push-in portion 21 of the fluid pipe 2 formed in this manner is inserted into the tubular receptacles 3 at both left and right ends of the straight pipe portion 5A of the pipe joint 1 so that the inner end seal portion 18 of the pipe joint body 5 is inserted. The outer peripheral surface of the fluid pipe 2 deformed along the tapered surface 23 of the cylindrical seal member 6 is brought into contact with the secondary seal portion 12 of the pipe joint body 5 while being brought into contact with the primary seal portion 10.

【0019】次いで、予め各流体管2に遊嵌させている
押輪8の雌ねじ部31を管継手本体5における各受口3
外周の雄ねじ部14に螺合し、かつ螺進させて強く締め
付けることによって、上記内端シール部18と一次シー
ル部10との間および筒状シール部材6のテーパ面23
に沿って変形した流体管2の外周面と二次シール部12
との間に強い密封力を与えて管継手本体5における直線
状管部5Aの左右両端の筒状受口3に二つの流体管2
を、流体の漏洩や異物の侵入のないような優れたシール
性を確保した状態で接続することが可能である。また、
筒状シール部材6の内周が管継手本体5における直線状
管部5Aの内周と同径に形成されて、流体の流動を妨げ
ることがないので、流体が滞留することなく、円滑な流
動性を確保することが可能である。
Next, the female thread portion 31 of the press wheel 8 previously loosely fitted to each fluid pipe 2 is connected to each of the sockets 3 in the pipe joint body 5.
By being screwed into the outer threaded portion 14 on the outer periphery and screwed and strongly tightened, the space between the inner end seal portion 18 and the primary seal portion 10 and the tapered surface 23 of the cylindrical seal member 6 are formed.
Outer peripheral surface of the fluid pipe 2 deformed along the
Between the two fluid pipes 2 in the tubular receiving ports 3 at the left and right ends of the straight pipe portion 5A in the pipe joint body 5 by applying a strong sealing force between the two pipes.
Can be connected in a state where an excellent sealing property is ensured so as to prevent leakage of fluid and intrusion of foreign matter. Also,
The inner circumference of the cylindrical seal member 6 is formed to have the same diameter as the inner circumference of the straight pipe portion 5A in the pipe joint body 5 and does not hinder the flow of the fluid, so that the fluid does not stay and flows smoothly. It is possible to secure the property.

【0020】一方、圧力センサー27を内蔵したフッ素
樹脂製のセンサーケース28を筒状シール部材7内に嵌
合保持した上、この筒状シール部材7を管継手1におけ
る立上り管部5B端部の筒状受口4に挿入して、その内
端シール部24を該受口4の一次シール部11に当接さ
せるとともに、外端側シール部25を受口4の二次シー
ル部13に当接させる。その後、予め上記センサーケー
ス28に遊嵌させている押輪9の雌ねじ部32を管継手
本体5における受口4外周の雄ねじ部15に螺合し、か
つ螺進させて強く締め付けることによって、上記センサ
ーケース28の鍔部29を介して上記筒状シール部材7
が軸線方向内方へ押圧されて、内端シール部24と一次
シール部11との間および外端側シール部25と二次シ
ール部13との間にそれぞれ強い密封力が与えられると
ともに、筒状シール部材7が押輪9と一次シール部11
とによって軸方向の両側から強く挟着保持されることに
なるので、管継手本体5内を流通する流体が高温流体や
温度変動の激しい流体であっても、筒状シール部材7の
クリープや応力緩和が抑制されて圧力センサー27の内
蔵箇所からの流体漏洩が確実に防止される。
On the other hand, a fluororesin sensor case 28 having a built-in pressure sensor 27 is fitted and held in the cylindrical sealing member 7 and the cylindrical sealing member 7 is attached to the end of the rising pipe portion 5 B of the pipe joint 1. It is inserted into the cylindrical receptacle 4, and the inner end seal portion 24 is brought into contact with the primary seal portion 11 of the receptacle 4, and the outer end side seal portion 25 is brought into contact with the secondary seal portion 13 of the receptacle 4. Contact Thereafter, the female screw portion 32 of the press ring 9 loosely fitted in the sensor case 28 in advance is screwed into the male screw portion 15 on the outer periphery of the socket 4 of the pipe joint body 5, and is screwed forward to be tightly tightened. The cylindrical sealing member 7 is provided via a flange 29 of the case 28.
Are pressed inward in the axial direction to apply strong sealing force between the inner end seal portion 24 and the primary seal portion 11 and between the outer end side seal portion 25 and the secondary seal portion 13, respectively. Seal member 7 is composed of pressing ring 9 and primary seal portion 11
Therefore, even if the fluid flowing through the pipe joint body 5 is a high-temperature fluid or a fluid having a large temperature fluctuation, the creep and stress of the cylindrical seal member 7 can be increased even when the fluid flowing through the pipe joint body 5 is a high-temperature fluid or a fluid having a large temperature fluctuation. The mitigation is suppressed, and the fluid leakage from the built-in portion of the pressure sensor 27 is reliably prevented.

【0021】上記の如く優れたシール性能を確保した状
態で管継手本体5に取付け可能な筒状シール部材7内に
圧力センサー27を内蔵した樹脂製センサーケース28
を嵌合させることにより、センサー設置コストの低減、
センサー27の保守や点検、交換などメンテナンス時の
取付け、取り外しの容易性、薬液のような腐食性の強い
流体である場合に該センサー27を腐食から保護する保
護機能を達成できると同時に、流体の漏洩に伴う周囲へ
の悪影響および圧力計測誤差の発生を回避することが可
能である。
A resin sensor case 28 in which a pressure sensor 27 is built in a cylindrical seal member 7 that can be attached to the pipe joint body 5 with excellent sealing performance as described above.
To reduce sensor installation cost,
The sensor 27 can be easily attached and detached during maintenance such as maintenance, inspection, and replacement, and can achieve a protection function of protecting the sensor 27 from corrosion when the fluid is a highly corrosive fluid such as a chemical. It is possible to avoid adverse effects on the surroundings due to leakage and occurrence of pressure measurement errors.

【0022】図4は本発明に係る流体計測用センサーの
一例である圧力センサーの取付構造の第2の実施形態を
示す縦断面図であり、この第2の実施形態では、管継手
本体5における直線状管部5Aの左右両端に形成される
筒状受口3,3の内径が流体管2,2の外径と同一に設
定されており、該受口3,3の入口部にはその軸線C1
に対して交差状、つまり軸線方向の外方に向けて漸次拡
径するテーパ面からなるシール部12´,12´が形成
されている。
FIG. 4 is a longitudinal sectional view showing a second embodiment of a pressure sensor mounting structure which is an example of a fluid measurement sensor according to the present invention. The inner diameters of the cylindrical receiving ports 3, 3 formed at the left and right ends of the straight pipe section 5A are set to be the same as the outer diameters of the fluid pipes 2, 2, and the inlet ports of the receiving ports 3, 3 have the same inner diameter. Axis C1
, Seal portions 12 ′, 12 ′ each having a tapered surface whose diameter gradually increases outward in the axial direction are formed.

【0023】そして、上記直線状管部5A両端の筒状受
口3にそれぞれ流体管2の端部分をそれらの内径が同一
で流体滞留の原因となる段差を発生しないように挿入可
能なフッ素樹脂製シールリング40には上記軸線C1に
対して軸線方向の内方に向けて漸次縮径するテーパ面か
らなるシール面41が形成されており、このシール面4
1を上記シール部12´に当接させた上で、予め各流体
管2に遊嵌させている押輪8の雌ねじ部31を管継手本
体5における各受口3外周の雄ねじ部14に螺合し、か
つ螺進させて強く締め付けることによって、上記シール
リング40のシール面41と上記受口3側のシール部1
2´との間に強い密封力を与えて管継手本体5における
直線状管部5Aの左右両端の筒状受口3に二つの流体管
2を、流体の漏洩や異物の侵入のないような優れたシー
ル性を確保した状態で接続可能としている。
The end portions of the fluid pipes 2 are respectively inserted into the cylindrical receptacles 3 at both ends of the straight pipe portion 5A so that the inner diameters thereof are the same and a step which causes fluid retention can be prevented. The seal ring 40 is formed with a seal surface 41 formed of a tapered surface whose diameter gradually decreases inward in the axial direction with respect to the axis C1.
1 is brought into contact with the seal portion 12 ′, and the female screw portion 31 of the press ring 8 previously loosely fitted to each fluid pipe 2 is screwed into the male screw portion 14 on the outer periphery of each socket 3 in the pipe joint body 5. And tightly tightened by screwing, so that the sealing surface 41 of the seal ring 40 and the seal portion 1 on the socket 3 side
2 ′ to the two pipes 3 at the left and right ends of the straight pipe section 5A in the pipe joint body 5 so as to prevent fluid leakage or foreign matter intrusion. Connection is possible with excellent sealing properties.

【0024】一方、管継手本体5における立上り管部5
Bの端部の筒状受口4の入口部には該受口4の軸線C2
に対して交差状、つまり軸線方向の外方に向けて漸次拡
径するテーパ面からなるシール部13´が形成されてい
る。また、この筒状受口4内に挿入可能な筒状シール部
材7の外端部近くの外周には、外端側から軸線方向内端
側に向けて漸次縮径して上記受口4のシール部13´に
当接するテーパ面からなるシール部25´が形成されて
いる。また、この筒状シール部材7内には上記第1の実
施形態と同様に、圧力センサー27を内蔵したフッ素樹
脂製のセンサーケース28が嵌合されており、このセン
サーケース28の外端寄り外周部には上記筒状シール部
材7の外端面の外径とほぼ同径の鍔部29が一体に突出
形成されているとともに、内端部には圧力センサー27
を動作させることが可能な薄肉部28aが形成されてい
る。
On the other hand, the rising pipe portion 5 in the pipe joint body 5
At the entrance of the cylindrical socket 4 at the end of B, the axis C2 of the socket 4
, A seal portion 13 ′ having a tapered surface whose diameter gradually increases outward in the axial direction is formed. The outer diameter of the cylindrical seal member 7 which can be inserted into the cylindrical receptacle 4 is gradually reduced from the outer end toward the inner end in the axial direction. A seal portion 25 'formed of a tapered surface that comes into contact with the seal portion 13' is formed. As in the first embodiment, a fluororesin sensor case 28 having a built-in pressure sensor 27 is fitted into the cylindrical seal member 7. A flange 29 having substantially the same diameter as the outer diameter of the outer end surface of the cylindrical seal member 7 is integrally formed at the inner end, and a pressure sensor 27 is provided at the inner end.
The thin portion 28a that can operate is formed.

【0025】そして、管継手本体5における立上り管部
5Bの端部の筒状受口4に圧力センサー27を取り付け
るに際しては、上記圧力センサー27を内蔵したフッ素
樹脂製のセンサーケース28を筒状シール部材7内に嵌
合保持した上、この筒状シール部材7を管継手本体5に
おける立上り管部5B端部の筒状受口4に挿入して、そ
の外端側シール部25´を受口4の入口部側のシール部
13´に当接させた後、予め上記センサーケース28に
遊嵌させている押輪9の雌ねじ部32を管継手本体5に
おける受口4外周の雄ねじ部15に螺合し、かつ螺進さ
せて強く締め付けることによって、上記センサーケース
28の鍔部29を介して上記筒状シール部材7が軸線方
向内方へ押圧されて上記外端側シール部25´とシール
部13´との間に強い密封力が与えられ、これによっ
て、筒状シール部材7と管継手本体5側の筒状受口4と
の間のシール性を高く保持して圧力センサー27の内蔵
箇所からの流体漏洩を確実に防止する状態で、圧力セン
サー27を管継手本体5における立上り管部5Bの端部
の筒状受口4に取り付けることが可能である。
When the pressure sensor 27 is attached to the tubular receiving port 4 at the end of the rising pipe portion 5B of the pipe joint body 5, a fluororesin sensor case 28 containing the pressure sensor 27 is attached to the tubular seal. After fitting and holding the cylindrical sealing member 7 in the member 7, the cylindrical sealing member 7 is inserted into the cylindrical receiving port 4 at the end of the rising pipe portion 5B in the pipe joint body 5, and the outer end side sealing portion 25 'is used as a receiving port. 4, the female thread 32 of the press ring 9, which has been loosely fitted in the sensor case 28 in advance, is screwed into the external thread 15 of the outer periphery of the receptacle 4 in the pipe joint body 5. The cylindrical seal member 7 is pressed inward in the axial direction via the flange portion 29 of the sensor case 28 by being screwed together and screwed tightly, so that the outer end side seal portion 25 'and the seal portion Strong between 13 ' A sealing force is applied, thereby maintaining a high sealing property between the cylindrical sealing member 7 and the cylindrical receiving port 4 on the pipe joint body 5 side, and reliably preventing fluid leakage from the built-in portion of the pressure sensor 27. In a state where the pressure sensor 27 is prevented, the pressure sensor 27 can be attached to the tubular socket 4 at the end of the rising pipe portion 5B in the pipe joint body 5.

【0026】特に、上記図4に示す第2の実施形態にお
いては、筒状シール部材7の外端側シール部25´のテ
ーパ面を45°程度に設定し、これに当接する筒状受口
4側のシール部13´のテーパ面を40°程度に設定す
るといったように、テーパ面に角度差を設けることによ
って、両シール部25´,13´の接面圧を大きくして
シール性能を高く保持させることが可能である。
In particular, in the second embodiment shown in FIG. 4, the tapered surface of the outer end side sealing portion 25 'of the cylindrical sealing member 7 is set to about 45.degree. By providing an angle difference between the tapered surfaces, such as setting the tapered surface of the seal portion 13 'on the fourth side to about 40 °, the contact surface pressure between the two seal portions 25' and 13 'is increased to improve the sealing performance. It can be kept high.

【0027】図5は本発明に係る流体計測用センサーの
一例である圧力センサーの取付構造の第3の実施形態を
示す縦断面図であり、この第3の実施形態では、管継手
本体5における直線状管部5Aの左右両端に形成される
筒状受口3,3への流体管2,2の接続構造および管継
手本体5における立上り管部5B端部の筒状受口4への
圧力センサー取付構造の大部分が上記第1の実施形態と
略同様であり、相違する点は、筒状受口3,4の奥部の
一次シール部10,11および筒状シール部材6,7の
内端シール部18,24が、受口3,4の軸線C1,C
2に対して交差するテーパ面からなる内側シール部分1
0a,11aおよび18a,24aと受口3,4の軸線
C1,C2に沿って同芯状に深く圧入ぎみに当接嵌合す
る外側シール部分10b,11bおよび18b,24b
との二段階シール部に形成されている点であり、その他
の構成は第1の実施形態と同一であるため、該当部分に
同一の符号を付してそれらの詳しい説明は省略する。
FIG. 5 is a longitudinal sectional view showing a third embodiment of a pressure sensor mounting structure which is an example of a fluid measurement sensor according to the present invention. Connection structure of fluid pipes 2 and 2 to cylindrical receiving ports 3 and 3 formed at both left and right ends of straight pipe section 5A, and pressure on cylindrical receiving port 4 at end of rising pipe section 5B in pipe joint body 5 Most of the sensor mounting structure is substantially the same as that of the first embodiment, and the difference is that the primary sealing portions 10 and 11 and the cylindrical sealing members 6 and 7 at the back of the cylindrical receiving ports 3 and 4 are different. The inner end seal portions 18 and 24 are aligned with the axes C1 and C
Inner seal portion 1 consisting of a tapered surface intersecting with 2
Outer seal portions 10b, 11b and 18b, 24b which are fitted concentrically and deeply in a press fit along the axes C1, C2 of Oa, 11a and 18a, 24a and the receiving ports 3, 4.
Since the other configuration is the same as that of the first embodiment, the corresponding portions are denoted by the same reference numerals and detailed description thereof will be omitted.

【0028】そして、図5に示す第3の実施形態による
場合も、第1の実施形態の場合と同様に、管継手本体5
における直線状管部5Aの左右両端の筒状受口3に二つ
の流体管2を流体の漏洩や異物の侵入のないような優れ
たシール性を確保した状態で接続するとともに、筒状シ
ール部材6の内周が管継手本体5における直線状管部5
Aの内周と同径に形成されて、流体の流動を妨げること
なく円滑な流動性を確保することが可能であると同時
に、圧力センサー27の設置コストの低減、センサー2
7の保守や点検、交換などメンテナンス時の取付け、取
り外しの容易性、薬液のような腐食性の強い流体であっ
ても該センサー27を腐食から保護する保護機能を達成
できるとともに、二段階シール部の採用によってシール
性能を一層高めて圧力センサー27の取付け箇所からの
流体の漏洩に伴う周囲への悪影響および圧力計測誤差の
発生を回避することが可能である。
And, in the case of the third embodiment shown in FIG. 5, as in the case of the first embodiment, the pipe joint body 5
The two fluid pipes 2 are connected to the tubular receiving ports 3 at both left and right ends of the straight tubular section 5A in a state where an excellent sealing property for preventing leakage of fluid and intrusion of foreign matter is secured, and a tubular sealing member is provided. 6 has a straight pipe portion 5 in the pipe joint body 5.
A is formed to have the same diameter as the inner circumference of A, so that smooth fluidity can be secured without obstructing the flow of the fluid, and at the same time, the installation cost of the pressure sensor 27 is reduced,
7 can be easily attached and detached during maintenance such as maintenance, inspection and replacement, and a protective function of protecting the sensor 27 from corrosion even with a highly corrosive fluid such as a chemical solution. By adopting this, it is possible to further enhance the sealing performance and to avoid adverse effects on the surroundings due to leakage of fluid from the mounting location of the pressure sensor 27 and occurrence of a pressure measurement error.

【0029】なお、上記第1の実施形態および第3の実
施形態では、筒状シール部材6,7の内端シール部1
8,24(24´)を管継手本体5の一次シール部1
0,11(11´)と同一角度のテーパ面に形成したも
のについて説明したが、内端シール部18,24(24
´)を40°位のテーパ面とする一方、一次シール部1
0,11(11´)を45°位のテーパ面として角度差
を設けることによって、押輪8,9の螺進による押圧力
で両シール部18,10および11(11´),24
(24´)を圧接させることが可能となり、これによっ
て、内径側に強い密封力を集中させて流体の滞留部分の
発生をなくすることができる。
In the first and third embodiments, the inner end seal portion 1 of the cylindrical seal members 6, 7 is provided.
8, 24 (24 ') is the primary seal portion 1 of the pipe joint body 5.
Although the one formed on the taper surface having the same angle as 0, 11 (11 ') has been described, the inner end seal portions 18, 24 (24
') Is a taper surface of about 40 °, while the primary seal portion 1
By providing an angle difference between 0 and 11 (11 ') as a taper surface of about 45 °, the two seal portions 18, 10 and 11 (11'), 24
(24 ') can be brought into pressure contact, whereby a strong sealing force can be concentrated on the inner diameter side to eliminate the generation of a fluid stagnation portion.

【0030】また、上記各実施形態では、配管系への取
付け対象となる流体計測用センサーが圧力センサーの場
合について説明したが、この圧力センサーに限らず、流
体の汚染度を光学的に検出する光センサーや流体の温度
を計測する温度センサーなどの取付けに適用する場合
も、上記と同様なシール性能を確保して、センサーを流
体から守る保護機能および計測精度の向上機能を達成す
ることが可能である。
In each of the above embodiments, the case where the fluid measurement sensor to be attached to the piping system is a pressure sensor has been described. However, the present invention is not limited to this pressure sensor, and the degree of contamination of the fluid is optically detected. Even when applied to the installation of optical sensors and temperature sensors that measure the temperature of fluid, it is possible to achieve the same sealing performance as above and achieve the protection function of protecting the sensor from fluid and the function of improving measurement accuracy. It is.

【0031】さらに、センサーケースとして、上記各実
施形態で示したように、フッ素樹脂製のものを使用する
ことにより、薬液のように腐食性の強い流体であって
も、該センサケースの腐食および薬液の汚染を防止する
ことが可能であるが、これに限定されることなく、流体
の性状に応じてポリエチレン樹脂やエポキシ樹脂などを
選択使用することが可能である。
Further, as shown in each of the above embodiments, by using a fluororesin as the sensor case, even if the sensor case is a corrosive fluid such as a chemical solution, the corrosion of the sensor case can be prevented. Although it is possible to prevent contamination of the chemical solution, the present invention is not limited to this, and a polyethylene resin, an epoxy resin, or the like can be selectively used according to the properties of the fluid.

【0032】[0032]

【発明の効果】以上のように、請求項1に記載の発明に
よれば、管継手本体の端部に螺合させた押輪を螺進させ
ることによって、管継手本体の筒状受口側のシール部と
該筒状受口内に挿入された筒状シール部材側のシール部
とに強い密封力を与えて、管継手本体とセンサーケース
との間に高いシール性能を確保することができる。した
がって、管継手本体の受口に挿入設置された筒状シール
部材内に流体センサーを内蔵した樹脂製のセンサーケー
スを嵌合させる構成の採用により、センサー設置コスト
の低減を図るとともに、センサーの保守や点検、交換な
どメンテナンスの容易性およびセンサーの保護機能を達
成することができると同時に、流体の漏洩に伴う周囲へ
の悪影響および計測誤差の発生を回避することができる
という効果を奏する。
As described above, according to the first aspect of the present invention, the push ring screwed into the end of the pipe joint main body is screwed into the tubular socket side of the pipe joint main body. A strong sealing force is applied to the sealing portion and the sealing portion on the side of the cylindrical sealing member inserted into the cylindrical receiving opening, so that high sealing performance can be secured between the pipe joint body and the sensor case. Therefore, by adopting a configuration in which a resin sensor case with a built-in fluid sensor is fitted into a cylindrical seal member inserted and installed in the socket of the fitting body, the sensor installation cost is reduced and the sensor maintenance is reduced. This makes it possible to achieve easiness of maintenance such as inspection, replacement, and the protection function of the sensor, and at the same time, it is possible to avoid adverse effects on the surroundings due to leakage of fluid and occurrence of measurement errors.

【0033】また請求項2に記載の発明によれば、管継
手本体の端部に螺合させた押輪を螺進させることによっ
て、管継手本体の一次シール部および二次シール部と樹
脂製センサーケースを嵌合する筒状シール部材の内端シ
ール部および外端側シール部とにそれぞれ強い密封力を
与えるとともに、筒状シール部材を押輪と管継手本体の
一次シール部とにより軸方向の両側から強く挟着保持さ
せることができるので、管継手本体内を流通する流体が
高温流体や温度変動の激しい流体であっても、筒状シー
ル部材のクリープや応力緩和を抑制して高いシール性能
を確保することができる。したがって、管継手本体に取
付けられたセンサーケースに流体センサーを内蔵させる
構成の採用により、センサー設置コストの低減を図ると
ともに、センサーの保守や点検、交換などメンテナンス
の容易性およびセンサーの保護機能を達成でき、しか
も、薬液のような腐食性の強い流体や高温流体や温度変
動が激しい流体であっても、流体の漏洩を確実に防止し
て周囲への悪影響および計測誤差の発生を回避すること
ができるという効果を奏する。
According to the second aspect of the present invention, by pressing the push ring screwed into the end of the pipe joint main body, the primary seal part and the secondary seal part of the pipe joint main body and the resin sensor are formed. A strong sealing force is applied to the inner end seal portion and the outer end side seal portion of the cylindrical seal member to which the case is fitted, and the cylindrical seal member is axially moved by the pressing ring and the primary seal portion of the pipe joint body. High clamping performance by suppressing creep and stress relaxation of the cylindrical sealing member, even if the fluid flowing through the pipe fitting body is a high-temperature fluid or a fluid with severe temperature fluctuations. Can be secured. Therefore, by adopting a configuration in which the fluid sensor is built into the sensor case attached to the fitting body, the sensor installation cost is reduced, and maintenance of the sensor such as maintenance, inspection and replacement is easy, and the sensor protection function is achieved. Even with highly corrosive fluids such as chemicals, high-temperature fluids, and fluids with high temperature fluctuations, it is possible to reliably prevent fluid leakage and avoid adverse effects on the surroundings and measurement errors. It has the effect of being able to.

【0034】また、請求項3および4に記載の発明によ
れば、上記請求項2に記載の発明の効果に加えて、流体
の漏洩防止機能(シール性能)を一層高めて、特に圧力
の計測精度の向上を図ることができる。
According to the third and fourth aspects of the present invention, in addition to the effects of the second aspect of the present invention, the function of preventing fluid leakage (seal performance) is further enhanced, and particularly pressure measurement is performed. Accuracy can be improved.

【0035】さらに、請求項5に記載の発明によれば、
薬液のような腐食性の強い流体である場合において、該
センサケースの腐食および薬液の汚染を確実に防止する
ことができる。
Further, according to the invention described in claim 5,
In the case of a highly corrosive fluid such as a chemical solution, corrosion of the sensor case and contamination of the chemical solution can be reliably prevented.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係る流体計測用センサーの一例である
圧力センサーの取付構造の第1の実施形態を示す縦断面
図である。
FIG. 1 is a longitudinal sectional view showing a first embodiment of a pressure sensor mounting structure which is an example of a fluid measurement sensor according to the present invention.

【図2】図1における流体管接続部の構造を示す拡大縦
断面図である。
FIG. 2 is an enlarged vertical sectional view showing a structure of a fluid pipe connecting portion in FIG.

【図3】図1における圧力センサー取付部の構造を示す
拡大縦断面図である。
FIG. 3 is an enlarged vertical sectional view showing a structure of a pressure sensor mounting portion in FIG.

【図4】本発明に係る流体計測用センサーの一例である
圧力センサーの取付構造の第2の実施形態を示す縦断面
図である。
FIG. 4 is a longitudinal sectional view showing a second embodiment of a pressure sensor mounting structure as an example of a fluid measurement sensor according to the present invention.

【図5】本発明に係る流体計測用センサーの一例である
圧力センサーの取付構造の第3の実施形態を示す縦断面
図である。
FIG. 5 is a longitudinal sectional view showing a third embodiment of a pressure sensor mounting structure which is an example of a fluid measurement sensor according to the present invention.

【符号の説明】[Explanation of symbols]

1 管継手 2 流体管 4 筒状受口 5 管継手本体 7 筒状シール部材 11,11´ 一次シール部 11a 内側シール部分 11b 外側シール部分 13 二次シール部 13´ シール部 24 内端シール部 25 外端側シール部 27 圧力センサー(流体計測用センサー) 28 樹脂製センサーケース DESCRIPTION OF SYMBOLS 1 Pipe joint 2 Fluid pipe 4 Cylindrical socket 5 Pipe joint main body 7 Cylindrical seal member 11, 11 'Primary seal part 11a Inner seal part 11b Outer seal part 13 Secondary seal part 13' Seal part 24 Inner end seal part 25 Outer end seal part 27 Pressure sensor (Sensor for fluid measurement) 28 Resin sensor case

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) G01D 11/30 G01L 19/00 G12B 9/08 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. 6 , DB name) G01D 11/30 G01L 19/00 G12B 9/08

Claims (5)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 端部に筒状の受口を有し、この受口の少
なくとも入口部に該受口の軸線に対して交差状のシール
部が形成されている管継手本体と、 この管継手本体の上記筒状受口内に挿入可能で、その挿
入状態において上記シール部に当接するシール部を有す
る筒状シール部材と、 流体計測用センサーを内蔵し、上記筒状シール部材内に
嵌合可能な樹脂製のセンサーケースと、 上記継手本体の端部に螺合し、螺進により上記筒状シー
ル部材を上記センサーケースの外側から押圧して該筒状
シール部材側のシール部と上記受口側のシール部とに密
封力を与える押輪とを具備したことを特徴とする流体計
測用センサーの取付構造。
1. A pipe joint body having a cylindrical receiving end at an end thereof, and a seal formed at least at an inlet of the receiving opening so as to intersect an axis of the receiving end. A tubular seal member that can be inserted into the tubular receptacle of the joint body and has a seal portion that comes into contact with the seal portion in the inserted state, and a built-in fluid measurement sensor that fits inside the tubular seal member A possible resin-made sensor case, screwed into the end of the joint body, and pushing the cylindrical seal member from the outside of the sensor case by screwing to allow the cylindrical seal member-side seal portion to A mounting structure for a sensor for measuring fluid, comprising a sealing ring on the mouth side and a pressing ring for applying a sealing force.
【請求項2】 端部に筒状の受口を有し、この受口の奥
部に一次シール部が形成されているとともに、入口部に
該受口の軸線に対して交差状の二次シール部が形成され
ている管継手本体と、 この管継手本体の上記筒状受口内に挿入可能で、その挿
入状態において上記一次シール部に当接する内端シール
部および上記二次シール部に当接する外端側シール部を
有する筒状シール部材と、 流体計測用センサーを内蔵し、上記筒状シール部材内に
嵌合可能な樹脂製のセンサーケースと、 上記継手本体の端部に螺合し、螺進により上記筒状シー
ル部材を上記センサーケースの外側から押圧して該筒状
シール部材の内端シール部および外端側シール部と上記
受口の一次シール部および二次シール部に密封力を与え
る押輪とを具備したことを特徴とする流体計測用センサ
ーの取付構造。
2. An end portion having a cylindrical receiving port, a primary seal portion is formed in a deep portion of the receiving port, and a secondary crossing with respect to an axis of the receiving port at an inlet portion. A pipe joint body in which a seal portion is formed, and an inner end seal portion and a secondary seal portion that can be inserted into the tubular socket of the pipe joint body and abut on the primary seal portion in the inserted state. A cylindrical seal member having an outer end side seal portion in contact therewith; a resin sensor case having a built-in fluid measurement sensor and capable of being fitted into the cylindrical seal member; and being screwed to an end of the joint body. The cylindrical seal member is pressed from the outside of the sensor case by screwing to seal the inner seal portion and the outer end seal portion of the cylindrical seal member with the primary seal portion and the secondary seal portion of the receiving port. And a press wheel for applying force. Mounting structure for body measurement sensor.
【請求項3】 上記筒状受口の奥部の一次シール部およ
び上記筒状シール部材の内端シール部が、受口の軸線に
対して上記二次シール部とは逆向きの交差状に形成され
ている請求項2に記載の流体計測用センサーの取付構
造。
3. A primary seal portion at an inner portion of the cylindrical receiving port and an inner end sealing portion of the cylindrical sealing member are formed in a cross shape opposite to the secondary sealing portion with respect to an axis of the receiving port. The mounting structure of the fluid measurement sensor according to claim 2, wherein the mounting structure is formed.
【請求項4】 上記筒状受口の奥部の一次シール部およ
び上記筒状シール部材の内端シール部が、受口の軸線に
対して交差する内側シール部分と受口の軸線に沿って深
く嵌合する外側シール部分との二段階シール部に形成さ
れている請求項2に記載の流体計測用センサーの取付構
造。
4. A primary seal portion at an inner portion of the cylindrical socket and an inner end seal portion of the cylindrical seal member are formed along an inner seal portion intersecting an axis of the socket and an axis of the socket. 3. The mounting structure for a fluid measurement sensor according to claim 2, wherein the mounting structure is formed in a two-stage seal portion with an outer seal portion that fits deeply.
【請求項5】 上記センサーケースが、フッ素樹脂から
形成されたものである請求項1ないし4のいずれかに記
載の流体計測用センサーの取付構造。
5. The mounting structure for a fluid measurement sensor according to claim 1, wherein the sensor case is formed of a fluororesin.
JP23085797A 1997-08-27 1997-08-27 Mounting structure of sensor for fluid measurement Expired - Lifetime JP2969514B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23085797A JP2969514B2 (en) 1997-08-27 1997-08-27 Mounting structure of sensor for fluid measurement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23085797A JP2969514B2 (en) 1997-08-27 1997-08-27 Mounting structure of sensor for fluid measurement

Publications (2)

Publication Number Publication Date
JPH1164048A JPH1164048A (en) 1999-03-05
JP2969514B2 true JP2969514B2 (en) 1999-11-02

Family

ID=16914398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23085797A Expired - Lifetime JP2969514B2 (en) 1997-08-27 1997-08-27 Mounting structure of sensor for fluid measurement

Country Status (1)

Country Link
JP (1) JP2969514B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2871546B1 (en) * 2004-06-11 2008-02-22 Hutchinson Sa METHOD FOR MOUNTING A SENSOR IN A HYDRAULIC CIRCUIT, AND RIGID TUBE OF SAID CIRCUIT PROVIDED WITH SUCH A SENSOR
JP5912641B2 (en) * 2012-02-20 2016-04-27 日本ピラー工業株式会社 Mounting structure for fluid measurement sensor
CN103134540B (en) * 2012-12-05 2015-10-21 中北大学 High overload integrated protection structure
US11054291B2 (en) * 2015-07-28 2021-07-06 Sentec Ltd Electromagnetic flow sensor
DE102018107017A1 (en) * 2018-03-23 2019-09-26 Witzenmann Gmbh Socket with sensor connection and method for attaching a sensor to a pipeline
CN109443632B (en) * 2018-12-24 2023-10-27 天津万众科技股份有限公司 Core-supplementing wireless pressure transmitter with mounting bracket

Also Published As

Publication number Publication date
JPH1164048A (en) 1999-03-05

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