JP2011196688A - Overtemperature detection method at pipe brazing, and fluid control apparatus - Google Patents

Overtemperature detection method at pipe brazing, and fluid control apparatus Download PDF

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JP2011196688A
JP2011196688A JP2010060421A JP2010060421A JP2011196688A JP 2011196688 A JP2011196688 A JP 2011196688A JP 2010060421 A JP2010060421 A JP 2010060421A JP 2010060421 A JP2010060421 A JP 2010060421A JP 2011196688 A JP2011196688 A JP 2011196688A
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indicator
joint
main body
brazing
fluid control
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JP4951080B2 (en
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Takashi Hirakawa
尚 平川
Seiichi Nakano
誠一 中野
Daiki Nakagawa
大樹 中川
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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Priority to JP2010060421A priority Critical patent/JP4951080B2/en
Priority to CN201110047384.9A priority patent/CN102189306B/en
Priority to CN201410302805.1A priority patent/CN104070255B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • B23K3/08—Auxiliary devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Housings (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Abstract

PROBLEM TO BE SOLVED: To easily determine whether the effects of heat during brazing affects a component inside a body part 1 having a simple structure, when brazing a joint 2 of an electric valve 100 to piping 10.SOLUTION: An indicator 3 is attached so that the entire circumference of a joint 2 is covered in a root part of the joint 2 at the side of a body 1. The indicator 3 includes a synthetic resin as a thermoplastic member. The joint 2 is braised with the indicator 3, while a part of the indicator 3 and the body 1 is cooled. After the brazing, deformation, deterioration, or the like of the indicator 3 is confirmed by visual observation. The indicator 3 may be a cylindrical one, one obtained by forming a plurality of lateral grooves in a cylindrical shape, one obtained by forming a plurality of longitudinal grooves in a cylindrical shape, or one having a ring shape. The indicator may be a clip-shaped one or a mesh-shaped one. It may be applied to a four-way switching valve and an electromagnetic valve.

Description

本発明は、弁装置などの流体循環システムの回路に取り付けて使用する流体制御機器において、機器とシステムの配管をろう付けにて接合する時の過剰温度を検知する配管ろう付け時の過剰温度検知方法及び流体制御機器に関する。   The present invention relates to a fluid control device that is used by being attached to a circuit of a fluid circulation system such as a valve device, and detects an excessive temperature when brazing the piping of the device and the system by joining the piping of the system and the system. The present invention relates to a method and a fluid control device.

従来、流体循環システムの配管に弁装置等の流体制御機器を接合する手段として、機器の継手と配管とをろう付け接合することが多い。ろう付け作業は、流体制御機器の本体から数十mm離れた継手の先端部に、アセチレンガス溶接の場合３０００℃を超える熱を加え
て行うが、この際に流体制御機器の機能を著しく損なう可能性がある。例えば、流体制御機器の本体内部の部品の熱変形、磁気特性の劣化、物性変化などが起こりうる。 Conventionally, as a means for joining a fluid control device such as a valve device to a pipe of a fluid circulation system, a joint of the equipment and the pipe are often brazed and joined. Brazing is performed by applying heat exceeding 3000 ° C in the case of acetylene gas welding to the tip of the joint several tens of millimeters away from the main body of the fluid control device. In this case, the function of the fluid control device may be significantly impaired. There is sex. For example, thermal deformation of parts inside the main body of the fluid control device, deterioration of magnetic characteristics, change of physical properties, etc. can occur.

ところで、特開平１０−１８５０６６号公報（特許文献１）には、２つの管路を融着させるときの温度管理や融着状態を確認するために、温度により色が変化する示温部材を用いる技術が開示されている。また、特開２００２−６６７８２（特許文献２）及び、特開平６−３１３７８号公報（特許文献３）に開示された示温塗料などを外部より目視可能な位置に設け、機器などが曝された温度を色相の変化で示す方法がある。   By the way, in Japanese Patent Laid-Open No. 10-185066 (Patent Document 1), a technique of using a temperature indicating member whose color changes depending on temperature in order to check temperature management and a fused state when two pipes are fused. Is disclosed. In addition, the temperature indicating paint disclosed in JP-A-2002-66782 (Patent Document 2) and JP-A-6-31378 (Patent Document 3) is provided at a position where it can be seen from the outside, and the temperature at which the device is exposed. Is indicated by a change in hue.

特開平１０−１８５０６６号公報JP-A-10-185066 特開２００２−６６７８２JP 2002-66782 A 特開平６−３１３７８号公報JP-A-6-31378

流体循環システムとして冷凍サイクルがあり、この冷凍サイクルの配管に弁装置を取り付ける時も、弁装置の継手と配管とをろう付けしている。このろう付け作業では、弁装置の本体部を冷却するのが常であるが、それでも何らかの不具合で継手を介して本体内部に熱が伝わってしまう場合がある。   There is a refrigeration cycle as a fluid circulation system, and when the valve device is attached to the piping of the refrigeration cycle, the joint of the valve device and the piping are brazed. In this brazing operation, the main body of the valve device is usually cooled, but heat may still be transferred to the inside of the main body through the joint due to some trouble.

しかし、継手の一部の部分で伝熱が生じている場合には、前記特許文献１乃至３の示温部材あるいは示温塗料による方法では、継手の伝熱が生じていない箇所に示温部材等があると、その伝熱を検知することができない。また、特許文献１乃至３の示温部材あるいは示温塗料では、温度自体を判定できるが検知温度等の設定に手間を要するという問題がある。   However, when heat transfer occurs in a part of the joint, the temperature indicating member or the method using the temperature indicating paint disclosed in Patent Documents 1 to 3 includes a temperature indicating member or the like at a position where no heat transfer occurs in the joint. And the heat transfer cannot be detected. In addition, the temperature indicating member or temperature indicating paint disclosed in Patent Documents 1 to 3 has a problem that the temperature itself can be determined, but it takes time to set the detected temperature and the like.

本発明は、流体制御機器の継手に配管をろう付けする際に、流体制御機器の本体内部の部品に対してろう付け時の熱の影響が及んでいるかいないかを、簡単な構成で容易に判断できるようにすることを課題とする。   The present invention makes it easy to determine whether the influence of heat at the time of brazing is exerted on the components inside the main body of the fluid control device when the pipe is brazed to the joint of the fluid control device. The task is to be able to judge.

請求項１の配管ろう付け時の過剰温度検知方法は、本体部と継手とを有する流体制御機器の前記継手に流体循環システム用の配管を接合した後、前記本体部に対する過剰温度を検知する配管ろう付け時の過剰温度検知方法であって、前記流体制御機器において、前記継手の前記本体部側の付け根部分に、前記継手の全周を覆うように熱可塑性部材を予め取り付けておき、前記ろう付けの後に前記熱可塑性部材の状態により前記過剰温度を検知するようにしたことを特徴とする。   The method for detecting excessive temperature during brazing of a pipe according to claim 1 is a pipe for detecting an excessive temperature with respect to the main body after joining a pipe for a fluid circulation system to the joint of a fluid control device having a main body and a joint. In the fluid control device, a thermoplastic member is attached in advance to a base portion on the main body side of the joint so as to cover the entire circumference of the joint, and the brazing is performed. The excess temperature is detected according to the state of the thermoplastic member after attachment.

請求項２の流体制御機器は、前記配管ろう付け時の過剰温度検知方法に適用され、本体部と配管を接続するための継手とを有する流体制御機器であって、前記継手の前記本体部側の付け根部分に、前記継手の全周を覆うように熱可塑性部材が取り付けられていることを特徴とする。   The fluid control device according to claim 2 is a fluid control device that is applied to the method for detecting excess temperature during brazing of the pipe and includes a main body portion and a joint for connecting the pipe to the main body portion side of the joint. A thermoplastic member is attached to the base portion of the joint so as to cover the entire circumference of the joint.

請求項１の配管ろう付け時の過剰温度検知方法または請求項２の流体制御機器によれば、流体制御機器の継手の本体部側の付け根部分に、継手の全周を覆うように熱可塑性部材を予め取り付けられているので、ろう付けの後に、熱可塑性部材に変形や変質等がなければ、流体制御機器の本体部に過剰な熱が伝達せずに異常なくろう付けが行われたことを確認でき、熱可塑性部材に変形や変質等があれば流体制御機器の本体部に過剰な熱が伝達して本体部に異常が発生しているとして確認でき、ろう付け時の熱による影響を容易に確認することができる。   According to the method for detecting excess temperature during brazing of the pipe according to claim 1 or the fluid control device according to claim 2, the thermoplastic member covers the entire circumference of the joint at the base portion on the main body side of the joint of the fluid control device. Since there is no deformation or alteration of the thermoplastic member after brazing, it is confirmed that brazing has been performed without any abnormalities without transmitting excessive heat to the main body of the fluid control device. If there is deformation or alteration in the thermoplastic member, it can be confirmed that excess heat is transmitted to the main body of the fluid control device and that the main body is malfunctioning, and the influence of heat during brazing is easy Can be confirmed.

本発明の実施形の電動弁に対してろう付け作業が良好に行われている状態と、ろう付け作業が良好に行われていない状態を示す図である。It is a figure which shows the state in which the brazing operation | work is favorably performed with respect to the motor operated valve of embodiment of this invention, and the state in which the brazing operation | work is not performed favorably. 実施形態の電動弁の斜視図である。It is a perspective view of the motor operated valve of an embodiment. 図１及び図２の実施形態のインジケータの詳細を示す図である。It is a figure which shows the detail of the indicator of embodiment of FIG.1 and FIG.2. 実施形態における複数の横溝を形成したインジケータを示す図である。It is a figure which shows the indicator which formed the some horizontal groove in embodiment. 実施形態における複数の縦溝を形成したインジケータを示す図である。It is a figure which shows the indicator which formed the several vertical groove in embodiment. 実施形態におけるリング形状のインジケータを示す図である。It is a figure which shows the ring-shaped indicator in embodiment. 実施形態におけるクリップ状のインジケータ及びメッシュ状のインジケータを示す図である。It is a figure which shows the clip-shaped indicator and mesh-shaped indicator in embodiment. 実施形態における流体制御機器としての四方切換弁及び電磁弁を示す図である。It is a figure which shows the four-way switching valve and solenoid valve as a fluid control apparatus in embodiment.

次に、本発明の実施形態を図面を参照して説明する。実施形態は流体制御機器が電動弁でありこの電動弁を冷凍サイクル（流体循環サイクル）の配管にろう付けする例である。図１は実施形態の電動弁に対してろう付け作業が良好に行われている状態（図１(A) ）と、ろう付け作業が良好に行われていない状態（図１(B) ）を示す図である。図２は実施形態の電動弁の斜視図であり、図２(A) はインジケータ３を取り付ける前の状態、図２(B) はインジケータ３を取り付けた状態を示す。図３は実施形態のインジケータ３の要部詳細構造を示す図であり、図３(A) はインジケータ３の取り付け状態の側面図、図３(B) はインジケータ３の側面図、図３(C) はインジケータ３の底面図、図３(D) はインジケータ３の縦断面図である。   Next, embodiments of the present invention will be described with reference to the drawings. The embodiment is an example in which the fluid control device is a motor-operated valve and the motor-operated valve is brazed to piping of a refrigeration cycle (fluid circulation cycle). FIG. 1 shows a state where the brazing operation is performed well for the motor-operated valve of the embodiment (FIG. 1A) and a state where the brazing operation is not performed well (FIG. 1B). FIG. 2A and 2B are perspective views of the motor-operated valve according to the embodiment. FIG. 2A shows a state before the indicator 3 is attached, and FIG. 2B shows a state where the indicator 3 is attached. 3A and 3B are diagrams showing the detailed structure of the main part of the indicator 3 of the embodiment. FIG. 3A is a side view of the indicator 3 attached, FIG. 3B is a side view of the indicator 3, and FIG. ) Is a bottom view of the indicator 3, and FIG. 3D is a longitudinal sectional view of the indicator 3.

電動弁１００は本体部１と２つの継手２を有している。本体部１の外周には図示しないステータユニットが取り付けられ、本体部１の内部には、ステータユニットと共にステッピングモータを構成するロータが収容されている。また、本体部１の内部には、ロータの回転により弁体を弁座に対して直動される樹脂製のネジ機構や、弁室等を封止するＯリング等が配設されている。そして、継手２に配管１０をろう付けするとき、この本体部１の内部に高熱が伝達すると、本体部１の内部の上記各種の部品の熱変形、磁気特性の劣化、物性変化などをが起こりうるので、ろう付けによりこのような事態が生じているかいないかを検知する。   The motor-operated valve 100 has a main body 1 and two joints 2. A stator unit (not shown) is attached to the outer periphery of the main body 1, and a rotor that constitutes a stepping motor together with the stator unit is accommodated in the main body 1. In addition, a resin screw mechanism in which the valve body is moved directly with respect to the valve seat by rotation of the rotor, an O-ring for sealing the valve chamber, and the like are disposed inside the main body 1. When the pipe 10 is brazed to the joint 2, if high heat is transmitted to the inside of the main body 1, thermal deformation of the various parts inside the main body 1, deterioration of magnetic properties, changes in physical properties, and the like occur. Therefore, it is detected whether or not such a situation occurs due to brazing.

上記ろう付け時の熱の影響を検知するために、継手２にはインジケータ３がそれぞれ取り付けられている。図３に示すようにインジケータ３は円筒形状の部材であり、熱可塑性部材である合成樹脂で構成されている。図２に示すように、インジケータ３は、継手２の本体１側の付け根部分Ａにおいて、継手２の全周を覆うようにそれぞれ取り付けられている。すなわち、継手２の端部２１は配管１０に対してろう付けされる接合部分であるが、インジケータ３は継手２の端部２１から離れた本体部１に最も接近して取り付けられている。なお、一方の継手２は図２(B) のようにインジケータ３を取り付けた後、曲げ加工される。   In order to detect the influence of heat during brazing, an indicator 3 is attached to each joint 2. As shown in FIG. 3, the indicator 3 is a cylindrical member, and is made of a synthetic resin that is a thermoplastic member. As shown in FIG. 2, the indicators 3 are respectively attached so as to cover the entire circumference of the joint 2 at the base portion A on the main body 1 side of the joint 2. That is, the end 21 of the joint 2 is a joint portion that is brazed to the pipe 10, but the indicator 3 is attached closest to the main body 1 that is away from the end 21 of the joint 2. One joint 2 is bent after the indicator 3 is attached as shown in FIG.

図１は一方の継手２と配管１０とのろう付け作業の様子を示しており、ろう付け作業は以下のように行う。継手２と配管１０の接合面を洗浄し、フラックスを塗布して配管２０に継手２を組み付ける。本体部１とインジケータ３の部分を濡れウエス等で覆うことで、この本体部１とインジケータ３を冷却しながら、配管２０と継手２の接合部分をバーナー２０により加熱する。なお、バーナー２０はアセチレンガス溶接の場合３０００℃を超える熱を加える。そして、その接合部分に、ろう材を溶かし込み、冷めたら洗浄等を行う。なお、本体部１とインジケータ３を冷却する方法としては、本体部１とインジケータ３を水槽等の水に浸す方法でもよい。   FIG. 1 shows a state of brazing work between one joint 2 and the pipe 10, and the brazing work is performed as follows. The joint surface between the joint 2 and the pipe 10 is cleaned, a flux is applied, and the joint 2 is assembled to the pipe 20. By covering the main body 1 and the indicator 3 with wet cloth or the like, the burner 20 heats the joint between the pipe 20 and the joint 2 while cooling the main body 1 and the indicator 3. The burner 20 applies heat exceeding 3000 ° C. in the case of acetylene gas welding. Then, the brazing material is melted into the joint portion, and when it is cooled, washing or the like is performed. In addition, as a method of cooling the main-body part 1 and the indicator 3, the method of immersing the main-body part 1 and the indicator 3 in water, such as a water tank, may be used.

このような、ろう付け作業が終了したら、インジケータ３の形状を目視により確認し、インジケータ３に変形、変質等がなければ、ろう付けは良好とする。仮に、図１(B) のように、何らかの不具合で本体部１やインジケータ３の一部の冷却が行われなかった場合、接合部分から継手２に伝熱が生じ、その熱がインジケータ３の一部に達すると、そのインジケータ３に変形、変質等が生じる。また、その熱は本体部１の内部にも伝達されている可能性が高い。そこで、インジケータ３に変形、変質等があれば、ろう付け作業は不良とし、電動弁１００を取り外し、別の電動弁１００で同様な作業を行う。   When such a brazing operation is completed, the shape of the indicator 3 is visually confirmed, and if the indicator 3 is not deformed or altered, the brazing is good. As shown in FIG. 1B, when some of the main body 1 and the indicator 3 are not cooled due to some trouble, heat is generated from the joint to the joint 2, and the heat is one of the indicators 3. When reaching the area, the indicator 3 is deformed, altered, or the like. In addition, there is a high possibility that the heat is transferred to the inside of the main body 1. Therefore, if the indicator 3 is deformed, altered, or the like, the brazing operation is considered bad, and the motor-operated valve 100 is removed and the same operation is performed on another motor-operated valve 100.

なお、ろう付け作業が良好に終了した場合、電動弁１０のインジケータ３は継手２に付けたままでもよいし、取り外してもよい。インジケータ３を付けたままの場合には、その電動弁１０は、ろう付け作業が良好に行われたものであることを、後で確認することもできる。   When the brazing operation is completed successfully, the indicator 3 of the motor-operated valve 10 may remain attached to the joint 2 or may be removed. When the indicator 3 is left attached, the motor-operated valve 10 can confirm later that the brazing operation has been performed satisfactorily.

図４〜図６はインジケータ３の他の例を示す図であり、各図において、図(A) はインジケータ３の取り付け状態の側面図、図(B) はインジケータ３の側面図、図(C) はインジケータ３の底面図、図(D) はインジケータ３の縦断面図である。これらのインジケータ３も熱可塑性部材である合成樹脂で構成されている。   4 to 6 are diagrams showing other examples of the indicator 3. In each figure, FIG. (A) is a side view of the indicator 3 attached, FIG. (B) is a side view of the indicator 3, and FIG. ) Is a bottom view of the indicator 3, and FIG. (D) is a longitudinal sectional view of the indicator 3. These indicators 3 are also made of a synthetic resin which is a thermoplastic member.

図４のインジケータ３は、略円筒形状の本体の一方の縁に半径方向に複数の横溝３１を形成したものである。このインジケータ３は、横溝３１が形成されてない方の縁を本体部１側にして、継手２に取り付けられている。図５のインジケータ３は、略円筒形状の本体の外周に縦に複数の縦溝３２を形成したものである。図４の横溝３１や図５の縦溝３２のように溝を形成すると、インジケータ３が熱により一部溶解した場合にその状態を識別し易くなる。図６のインジケータ３は、ドーナツ型のリング形状としたものである。この図６のインジケータ３によれば、継手２に曲げ加工を施した後でも取り付けることができる。   The indicator 3 in FIG. 4 is formed by forming a plurality of lateral grooves 31 in the radial direction on one edge of a substantially cylindrical main body. The indicator 3 is attached to the joint 2 with the edge on which the lateral groove 31 is not formed facing the main body 1. The indicator 3 in FIG. 5 is formed by forming a plurality of vertical grooves 32 vertically on the outer periphery of a substantially cylindrical main body. Forming grooves such as the horizontal grooves 31 in FIG. 4 and the vertical grooves 32 in FIG. 5 makes it easy to identify the state when the indicator 3 is partially dissolved by heat. The indicator 3 in FIG. 6 has a donut-shaped ring shape. According to the indicator 3 in FIG. 6, the joint 2 can be attached even after being bent.

図７はインジケータ３のさらに他の例を示す図である。図７(A) 〜図７(C) のインジケータ３は熱可塑性部材である合成樹脂で構成したクリップ状の形状である。なお、図７(A) は図７(B) のインジケータ３を取り付けた状態を示しており、クリップ状の形状としては図７(C) のような形状でもよい。これらのインジケータ３は継手２に曲げ加工を施した後でも取り付けることができる。また、クリップ状の形状の円弧部分の樹脂の弾性によりインジケータ３を固定することができる。図７(D) のインジケータ３は熱可塑性部材である合成樹脂で構成したメッシュ状の形状であり、伸び縮みするので継手２に曲げ加工を施した後でも取り付けることができる。また、メッシュ状の形状により樹脂の弾性によりインジケータ３を固定することができる。   FIG. 7 is a diagram showing still another example of the indicator 3. The indicator 3 in FIGS. 7A to 7C has a clip-like shape made of a synthetic resin that is a thermoplastic member. FIG. 7A shows a state in which the indicator 3 of FIG. 7B is attached, and the clip-like shape may be a shape as shown in FIG. 7C. These indicators 3 can be attached even after the joint 2 is bent. Moreover, the indicator 3 can be fixed by the elasticity of the resin of the clip-shaped arc portion. The indicator 3 in FIG. 7 (D) has a mesh shape made of a synthetic resin, which is a thermoplastic member, and can be attached even after the joint 2 is bent because it expands and contracts. Further, the indicator 3 can be fixed by the elasticity of the resin due to the mesh shape.

図８は流体制御機器の他の例を示す図であり、図８(A) は四方切換弁の例、図８(B) は電磁弁の例である。図８(A) の四方切換弁２００は本体部１と４つの継手２を有している。本体部１の内部には、図示しないスライド弁、ピストン、弁座、Ｏリング等が収容されている。そして、各継手２にはインジケータ３がそれぞれ取り付けられている。図８(B)の電磁弁３００は本体部１と２つの継手２を有している。本体部１の内部には、図示しないプランジャ、プランジャチューブ、吸引子、弁座、Ｏリング等が収容されている。そして、各継手２にはインジケータ３がそれぞれ取り付けられている。なお、この図８(A) のインジケータ３及び図８(B) のインジケータ３としては、図１乃至図７の各インジケータ３を用いることができる。   FIG. 8 is a diagram showing another example of the fluid control device, FIG. 8A is an example of a four-way switching valve, and FIG. 8B is an example of an electromagnetic valve. A four-way switching valve 200 in FIG. 8A has a main body 1 and four joints 2. A slide valve, a piston, a valve seat, an O-ring and the like (not shown) are accommodated inside the main body 1. An indicator 3 is attached to each joint 2. The electromagnetic valve 300 in FIG. 8 (B) has a main body 1 and two joints 2. A plunger, a plunger tube, a suction element, a valve seat, an O-ring and the like (not shown) are accommodated in the main body 1. An indicator 3 is attached to each joint 2. Each indicator 3 in FIGS. 1 to 7 can be used as the indicator 3 in FIG. 8A and the indicator 3 in FIG. 8B.

以上の実施形態のインジケータ３は材質として熱可塑性の合成樹脂を用いているが、材質の詳細について、次のようにしてもよい。ろう付け時は、内部温度より外部の温度の方が高くなるので、本体部１の内部の部品に使用しているのと同じ樹脂材料をインジケータ３に使用してもよい。また、安全率を高めるために、内部の部品に使用している材質より低い融点の材質を使用することもできる。例えば、内部の部品にＰＰＳ材を使用した場合に、ＰＢＴやＰＥＴの材質をインジケータ３に使用することができる。   Although the indicator 3 of the above embodiment uses a thermoplastic synthetic resin as a material, the details of the material may be as follows. Since the external temperature is higher than the internal temperature at the time of brazing, the same resin material used for the internal components of the main body 1 may be used for the indicator 3. Moreover, in order to raise a safety factor, the material of melting | fusing point lower than the material currently used for internal components can also be used. For example, when a PPS material is used for an internal part, the material of PBT or PET can be used for the indicator 3.

１ 本体部
２ 継手
３ インジケータ
１００ 電動弁（流体制御機器）
２００ 四方切換弁（流体制御機器）
３００ 電磁弁（流体制御機器） DESCRIPTION OF SYMBOLS 1 Main-body part 2 Joint 3 Indicator 100 Electric valve (fluid control apparatus)
200 Four-way selector valve (fluid control device)
300 Solenoid valve (fluid control device)

Claims (2)

本体部と継手とを有する流体制御機器の前記継手に流体循環システム用の配管を接合したあと、前記本体部に対する過剰温度を検知する配管ろう付け時の過剰温度検知方法であって、
前記流体制御機器において、前記継手の前記本体側の付け根部分に、前記継手の全周を覆うように熱可塑性部材からなるインジケータを予め取り付けておき、前記ろう付けの後に前記インジケータの状態により前記過剰温度を検知するようにしたことを特徴とする配管ろう付け時の過剰温度検知方法。 After joining a pipe for a fluid circulation system to the joint of a fluid control device having a main body part and a joint, an excessive temperature detection method at the time of pipe brazing for detecting an excessive temperature with respect to the main body part,
In the fluid control device, an indicator made of a thermoplastic member is attached in advance to a base portion on the main body side of the joint so as to cover the entire circumference of the joint, and the excess of the indicator depending on the state of the indicator after the brazing. A method for detecting excessive temperature during brazing of a pipe, characterized by detecting temperature. 前記配管ろう付け時の過剰温度検知方法に適用され、本体部と配管を接続するための継手とを有する流体制御機器であって、前記継手の前記本体側の付け根部分に、前記継手の全周を覆うように熱可塑性部材からなるインジケータが取り付けられていることを特徴とする流体制御機器。   A fluid control device that is applied to a method for detecting excessive temperature during brazing of a pipe and has a main body part and a joint for connecting the pipe, and the entire circumference of the joint is provided at a base portion of the joint on the main body side. A fluid control device, wherein an indicator made of a thermoplastic member is attached so as to cover.
JP2010060421A 2010-03-17 2010-03-17 Method for detecting excess temperature during pipe brazing and fluid control equipment Expired - Fee Related JP4951080B2 (en)

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JPWO2017077648A1 (en) * 2015-11-06 2018-05-10 三菱電機株式会社 Outdoor unit
CN106624256A (en) * 2016-12-30 2017-05-10 东莞市圣荣自动化科技有限公司 Reflow soldering carrier storage table with improved structure
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JP2021055937A (en) * 2019-09-30 2021-04-08 株式会社富士通ゼネラル Switching unit and method for manufacturing switching unit

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