JP2009095847A - Valve pipe brazing device and valve pipe brazing method - Google Patents

Valve pipe brazing device and valve pipe brazing method Download PDF

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JP2009095847A
JP2009095847A JP2007269033A JP2007269033A JP2009095847A JP 2009095847 A JP2009095847 A JP 2009095847A JP 2007269033 A JP2007269033 A JP 2007269033A JP 2007269033 A JP2007269033 A JP 2007269033A JP 2009095847 A JP2009095847 A JP 2009095847A
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brazing
pipe
valve
cooling
piping
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JP4424684B2 (en
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Hideyuki Yotsui
秀幸 四井
Yasuyuki Mizuno
泰之 水野
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Chiyoda Kuchokiki Co Ltd
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Chiyoda Kuchokiki Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to lower brazing difficulty by suppressing heat input to an allowable level without submerging a valve body case and to uniformly flow a brazing material around a brazing part. <P>SOLUTION: A valve pipe brazing device includes a brazing posture holding jig 1 for holding the predetermined brazing posture where the end faces 90 of the outside pipes in the inserting portions of accessary pipes 81, 82 integral with a valve body case 7 and the outer pipes 91, 92 face upward, and a hollow detachable cooling cover body 2 for flowing cooling gas through the inside of the same and surrounding the valve body case 7 and cooling the case 7 when installing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、主に空調機用の電動弁等におけるバルブ本体ケースに一体化された付属配管に、室外機配管等の外部配管をロウ付けするバルブ配管ロウ付け装置及び同ロウ付け方法に関する。   The present invention relates to a valve pipe brazing apparatus and a brazing method for brazing external pipes such as outdoor unit pipes to accessory pipes integrated with a valve main body case mainly in an electric valve for an air conditioner.

従来、特許文献１等に記載されているように、空調機用の電動弁は、そのバルブ本体ケースの内部に、外周に嵌合するステータユニットにより駆動されるロータ部分及びこれに連動する弁棒を密閉状に設け、弁棒の進退により流量制御する内部通路と連通する一対の付属配管を、一方の第一配管はバルブ本体ケースの軸方向一端に突出する直管として、他方の第二配管はバルブ本体ケースの径方向側方に突出する曲管として各々バルブ本体ケースに炉中ロウ付け等により予め一体化している。
特開平９−６０７５５号公報 Conventionally, as described in Patent Document 1 and the like, an electric valve for an air conditioner includes a rotor portion driven by a stator unit fitted on the outer periphery of a valve main body case, and a valve rod linked to the rotor portion. A pair of attached pipes that communicate with the internal passage that controls the flow rate by advancing and retreating the valve stem, one first pipe is a straight pipe that protrudes at one end in the axial direction of the valve body case, and the other second pipe Are integrated in advance into the valve body case by brazing in the furnace, etc., as curved pipes protruding in the radial direction of the valve body case.
Japanese Patent Laid-Open No. 9-60755

付属配管を構成する第一及び第二配管の端部には、外部配管を構成する室外機配管が各ロウ付けされることになるが、そのままロウ付けを行うと、この種の電動弁の一般的な入熱制限温度約１２０℃に対し、２５０℃前後もの許容不可な入熱が生ずるため、必ず、冷却によりバルブ本体ケースを保護しなければならない。このため、通常、バルブ本体ケースを逆さにして水槽等に水没させ、第一及び第二配管の端部を水面から上に出して、この部分に室外機配管を各ロウ付けする水没ロウ付け工法が一般に用いられる。   The outdoor unit pipes constituting the external pipes are brazed to the end portions of the first and second pipes constituting the attached pipes. Since the allowable heat input temperature is about 120 ° C. and an unacceptable heat input of about 250 ° C. occurs, the valve body case must be protected by cooling. For this reason, the submerged brazing method in which the valve body case is usually inverted and submerged in a water tank or the like, the ends of the first and second pipes are taken out from the water surface, and the outdoor unit pipes are brazed to this part. Is generally used.

ところで、電動弁の安定的な作動を保証すると共に、室外機への組込み状態で後にロウ付け部分を外して電動弁の交換に対処可能とする等の配慮から、バルブ本体ケースを上にして第一及び第二配管を下から取り出す組込み姿勢とし、第一及び第二配管の端部はストレート又は先細り形状として、これを組込み時に端面が上向きとなる外部配管の拡管部の内側に挿入させるのが一般的である。   By the way, in order to guarantee the stable operation of the motorized valve and to be able to deal with replacement of the motorized valve by removing the brazed part later in the built-in state in the outdoor unit, The installation posture is to take out the first and second pipes from below, and the ends of the first and second pipes are straight or tapered, and this is inserted into the expanded pipe part of the external pipe with the end face facing upward when installed. It is common.

このため、バルブ本体ケースを逆さにする水没ロウ付け工法の実施中は、第一又は第二配管の端部を挿入させる外側配管たる外部配管の拡管部の端面が下を向き、ロウ材の給線を上向きで行い、重力に逆らいつつ、下向きの拡管部の端面全周にロウ材を回す必要があり、ロウ付けの難易度が極めて高くなる。また、付属配管等の寸法バラツキを加味しながら適正なロウ材給線位置を確保し難く、自動ロウ付けにも不向きとなる。   For this reason, during the submerged brazing method in which the valve body case is turned upside down, the end face of the expanded pipe part of the external pipe, which is the outer pipe into which the end part of the first or second pipe is inserted, faces down, and the brazing material is supplied. It is necessary to turn the brazing material around the entire end surface of the downward expanded pipe portion while keeping the line upward and resisting gravity, and the difficulty of brazing becomes extremely high. In addition, it is difficult to secure an appropriate brazing material supply line position while taking into account dimensional variations of the attached piping and the like, and it is not suitable for automatic brazing.

従って、水没ロウ付け工法では、全周にロウ材が適量且つ均等に回らず、ロウ材の浸透不足が生じたり、逆に過剰にロウ材が垂れ下がって配管に付着する等の仕上がりの悪化が生じる恐れがあった。また、一般に空調機において冷媒流通系内への水の混入は厳禁であり、水没中及びその前後で水入り防止管理を徹底しなければならない煩雑さもあった。   Therefore, in the submerged brazing method, the brazing material does not rotate in an appropriate amount and evenly around the entire circumference, resulting in insufficient penetration of the brazing material, or conversely, the deterioration of the finish such as excessive brazing of the brazing material and adhering to the piping. There was a fear. In general, in an air conditioner, mixing of water into the refrigerant distribution system is strictly prohibited, and there is a problem that it is necessary to thoroughly prevent and enter water during and after submersion.

本発明では、バルブ本体ケースを水没させる必要がなく、許容入熱に抑制できつつロウ付け難易度を低くでき、ロウ付け部分にロウ材を適量且つ均等に回すことができるバルブ配管ロウ付け装置及び同ロウ付け方法を提供することを課題とする。   In the present invention, it is not necessary to submerge the valve body case, the brazing difficulty can be reduced while suppressing to allowable heat input, and a brazing material for brazing a brazing material capable of rotating a brazing material in an appropriate amount and evenly. It is an object to provide the brazing method.

上記課題を解決するためのバルブ配管ロウ付け装置を、図面に例示した構成部品の符号とともに示す。即ち、バルブ本体ケース（７）に一体化された付属配管（８）に外部配管（９）をロウ付けするバルブ配管ロウ付け装置（１００）において、前記付属配管（８）と前記外部配管（９）との挿入部における外側配管の端面（９０）が上を向く所定ロウ付け姿勢に保持させるロウ付け姿勢保持具（１）と、内部に冷却用気体を流通させ、装着時に前記バルブ本体ケース（７）を取り囲んで該ケース（７）を冷却する着脱自在な中空状の冷却カバー体（２）とを含むことを特徴とする。   A valve pipe brazing apparatus for solving the above-mentioned problems is shown together with reference numerals of components illustrated in the drawings. That is, in the valve pipe brazing device (100) for brazing the external pipe (9) to the auxiliary pipe (8) integrated with the valve body case (7), the auxiliary pipe (8) and the external pipe (9 ) And a brazing posture holding tool (1) for holding in a predetermined brazing posture in which the end face (90) of the outer pipe in the insertion portion faces upward, and the valve body case ( And a detachable hollow cooling cover body (2) that surrounds 7) and cools the case (7).

上記したバルブ配管ロウ付け装置（１００）において、前記付属配管（８）は、前記バルブ本体ケース（７）の軸方向一端に突出する第一配管（８１）と、前記バルブ本体ケース（７）の径方向側方に突出し、曲部を介して前記第一配管（８１）と略平行状に延びる第二配管（８２）とから成り、前記冷却カバー体（２）は、前記バルブ本体ケース（７）の外周に巻回するパイプ状の本体コイル（２１）と、この本体コイル（２１）と連続し、前記バルブ本体ケース（７）の外周と前記第二配管（８２）の側方突出部（８２１）及び曲部（８２２）とに巻回するパイプ状の異形コイル（２２）とから成るものとするのが好ましい。   In the valve pipe brazing device (100) described above, the accessory pipe (8) includes a first pipe (81) protruding from one end of the valve main body case (7) in the axial direction, and the valve main body case (7). The cooling cover body (2) protrudes in the radial direction and includes a second pipe (82) extending substantially parallel to the first pipe (81) via a curved portion. ) And a pipe-shaped body coil (21) wound around the outer periphery of the valve body, and the body coil (21) are connected to the outer periphery of the valve body case (7) and the side protrusions of the second pipe (82) ( 821) and a curved portion (822), and preferably a pipe-shaped deformed coil (22).

更に、前記第一配管（８１）の突出始端付近に対応させて、前記冷却カバー体（２）を流通する冷却用気体の一部を吹き付ける第一冷気吹口（２３）を開口すると共に、前記第二配管（８２）の突出始端付近に対応させて、前記冷却カバー体（１）を流通し且つ前記第一冷気吹口（２３）の下流から取り出す冷却用気体を吹き付ける第二冷気吹口（２８）を開口するのが好ましい。   Further, a first cold air outlet (23) for blowing a part of the cooling gas flowing through the cooling cover body (2) is opened corresponding to the vicinity of the protruding start end of the first pipe (81), and the first Corresponding to the vicinity of the protruding start end of the two pipes (82), a second cold air outlet (28) through which the cooling gas that flows through the cooling cover body (1) and is taken out from the downstream of the first cold air outlet (23) is blown. It is preferable to open.

また、前記第二配管（８２）の反曲げ側において前記異形コイル（２２）から露出する側方突出部（８２１）に対応させて、前記冷却カバー体（２）を経由しない経路から供給する気体を吹き付ける補助吹口（２９）を開口するのが好ましい。   Further, the gas supplied from the path not passing through the cooling cover body (2) in correspondence with the side protrusion (821) exposed from the deformed coil (22) on the opposite side of the second pipe (82). It is preferable to open the auxiliary outlet (29) for spraying.

その上、更に、前記第一配管（８１）及び前記第二配管（８２）における各ロウ付け部付近及び該各ロウ付け部付近から変位する部位の計四箇所に対応させて、前記冷却カバー体（２）を経由しない経路から供給する気体を吹き付ける四連吹口（４）を開口するのが好ましい。   In addition, the cooling cover body is further associated with a total of four locations in the first pipe (81) and the second pipe (82) in the vicinity of the brazing portions and the portions displaced from the brazing portions. It is preferable to open the quadruple outlet (4) for blowing the gas supplied from the path not passing through (2).

また、前記冷却カバー体（２）を前記バルブ本体ケース（７）に対して装着状態と離脱状態との間で移動させる移動機構（３０）を設けると共に、前記装着状態において前記冷却カバー体（２）を流通した冷却用気体の流出を検出する装着状態検出機構（４０）を設けるのが好ましい。   In addition, a moving mechanism (30) for moving the cooling cover body (2) relative to the valve body case (7) between a mounted state and a detached state is provided, and the cooling cover body (2) in the mounted state. It is preferable to provide a mounting state detection mechanism (40) for detecting the outflow of the cooling gas that has circulated).

一方、上記課題を解決するためのバルブ配管ロウ付け方法は、バルブ本体ケース（７）に一体化された付属配管（８）に外部配管（９）をロウ付けするバルブ配管ロウ付け方法において、前記付属配管（８）と前記外部配管（９）との挿入部における外側配管の端面（９０）が上を向く所定ロウ付け姿勢に保持させると共に、前記バルブ本体ケース（７）に該ケース（７）を取り囲む中空状の冷却カバー体（２）を装着し、この状態で前記冷却カバー体（２）の内部に冷却用気体を流通させて前記バルブ本体ケース（７）を冷却する強制気冷条件下、バーナーによる炙り及びロウ材の給線をする遮熱炙り給線工程を経ることを特徴とする。   On the other hand, the valve pipe brazing method for solving the above-mentioned problem is the valve pipe brazing method in which the external pipe (9) is brazed to the auxiliary pipe (8) integrated with the valve body case (7). The end face (90) of the outer pipe at the insertion portion between the attached pipe (8) and the external pipe (9) is held in a predetermined brazing posture facing upward, and the valve main body case (7) has the case (7) A hollow cooling cover body (2) surrounding the valve body, and in this state, a cooling gas is passed through the cooling cover body (2) to cool the valve body case (7). In addition, the heat-shielding wire feeding process is performed in which the wire is burned by a burner and the brazing material is fed.

上記バルブ配管ロウ付け方法において、前記遮熱炙り給線工程に続き、ロウ材凝固のための所定時間の経過を待ち、この後、ロウ付け部付近を含む前記付属配管（８）に後冷却用の気体を吹き付ける後冷却工程を経るのが好ましい。   In the above valve piping brazing method, after the heat insulation and feeding line process, a predetermined time for solidifying the brazing material is awaited, and then the auxiliary piping (8) including the vicinity of the brazing portion is used for post cooling. It is preferable to go through a cooling step after blowing the gas.

上記バルブ配管ロウ付け装置（１００）によれば、ロウ付け姿勢保持具（１）により、付属配管（８）と外部配管（９）との挿入部における外側配管の端面（９０）が上を向く所定ロウ付け姿勢に保たれ、外側配管の端面（９０）側に向けて重力に沿ってロウ材を流し込むことができる。しかも、冷却カバー体（２）の内部に流通させる冷却用気体により、該カバー体（２）で取り囲むバルブ本体ケース（７）を強制冷却することができる。これらにより、ロウ付けに伴う入熱を効果的に抑制できながらロウ付けの難易度を低くでき、ロウ付け部分にロウ材を適量且つ均等に回すことができる。また、重力に沿って下向きにロウ材を流し込むことができるため、付属配管（８）の寸法バラツキ等を吸収できながらロウ材給線位置を柔軟に設定することができ、自動ロウ付けにも良好に適合させることができる。勿論、水没の必要もない。従って、信頼性の高いロウ付けが行え、仕上がりも綺麗になる。   According to the valve pipe brazing device (100), the end face (90) of the outer pipe at the insertion portion of the attached pipe (8) and the external pipe (9) faces upward due to the brazing posture holder (1). The brazing material can be poured along the gravity toward the end face (90) side of the outer pipe while being kept in a predetermined brazing posture. Moreover, the valve main body case (7) surrounded by the cover body (2) can be forcibly cooled by the cooling gas flowing inside the cooling cover body (2). As a result, it is possible to reduce the difficulty of brazing while effectively suppressing the heat input associated with brazing, and the brazing material can be appropriately and evenly turned to the brazed portion. In addition, since the brazing material can be poured downward along the gravity, it is possible to flexibly set the brazing material supply line position while absorbing the dimension variation of the attached pipe (8), and it is also suitable for automatic brazing. Can be adapted. Of course, there is no need for submersion. Therefore, it is possible to perform brazing with high reliability and a beautiful finish.

上記のように冷却カバー体（２）をパイプ状の本体コイル（２１）とこれに連続する異形コイル（２２）とから成るものとした場合、バルブ本体ケース（７）への装着性を良好なものに担保できながら、バルブ本体ケース（７）の径方向側方に突出して曲がる第二配管（８２）側の入熱も効果的に抑制でき、良好な遮熱が行える。   When the cooling cover body (2) is composed of the pipe-shaped main body coil (21) and the deformed coil (22) continuous therewith as described above, the mounting property to the valve main body case (7) is good. The heat input on the second pipe (82) side that protrudes and bends in the radial direction of the valve main body case (7) can be effectively suppressed, and good heat shielding can be performed.

上記のように第一冷気吹口（２３）及び第二冷気吹口（２８）を開口する場合、第一配管（８１）及び第二配管（８２）を介したバルブ本体ケース（７）への入熱を効果的に抑制できると共に、ロウ付けに伴うバーナー炎が異形コイル（２２）の端部開口からバルブ本体ケース（７）側に進入するのを防ぐシールドの役目を発揮させることができる。この場合、第二冷気吹口（２８）は第一冷気吹口（２３）の下流から取り出す冷却用気体を吹き付け、第一冷気吹口（２３）の手前までは流通させる冷却用気体の全量によりバルブ本体ケース（７）を冷却できるため、過不足のない効率的な冷却が行える。このような効率的な冷却及び炎侵入のシールド効果により、酸化による配管部材の変色や劣化等を低減でき、仕上がりを一層綺麗なものにできる。   When opening the first cold air outlet (23) and the second cold air outlet (28) as described above, heat input to the valve body case (7) via the first pipe (81) and the second pipe (82). Can be effectively suppressed, and the role of a shield that prevents the burner flame accompanying brazing from entering the valve body case (7) side from the end opening of the deformed coil (22) can be exhibited. In this case, the second cold air blowing port (28) blows the cooling gas taken out from the downstream side of the first cold air blowing port (23), and the valve body case depends on the total amount of the cooling gas to be circulated before the first cold air blowing port (23). Since (7) can be cooled, efficient cooling without excess or deficiency can be performed. Such efficient cooling and flame penetration shielding effects can reduce discoloration and deterioration of the piping member due to oxidation, and can further improve the finish.

上記のように補助吹口（２９）を開口する場合、例えばロウ付けバーナーの消火後にこの補助吹口（２９）から気体を吹き付けることにより、伝熱影響の比較的大きい第二配管（８２）側からの入熱を補完的に抑制できると共に、第二配管（８２）の反曲げ側に露出する側方突出部（８２１）に吹き付けられて弾かれた気体により異形コイル（２２）自体も冷却でき、二回目以降のロウ付け時にも冷却能力を高く保つことができる。しかも、第二配管（８２）のロウ付け部側には勢いの殺された気体が抜けるだけであるため、バーナー消火直後は未だ溶融状態にあるロウ材を吹き飛ばしてしまうのも防止でき、良好な仕上がりも担保できる。   When the auxiliary air outlet (29) is opened as described above, for example, by blowing gas from the auxiliary air outlet (29) after extinguishing the brazing burner, the heat from the second pipe (82) having a relatively large heat transfer effect can be obtained. The heat input can be complementarily suppressed, and the deformed coil (22) itself can be cooled by the gas blown and blown to the side protrusion (821) exposed on the opposite side of the second pipe (82). The cooling capacity can be kept high even during the subsequent brazing. Moreover, since the gas killed by the momentum only escapes to the brazing portion side of the second pipe (82), it is possible to prevent blowing the brazing material that is still molten immediately after the burner is extinguished. The finish can be secured.

上記のように四連吹口（４）を開口する場合、例えば冷却カバー体（２）をバルブ本体ケース（７）から離脱させる前後の後冷却工程でこの四連吹口（４）から気体を吹き付けることにより、ロウ付け時に蓄積された余熱を効果的に取り除くことができ、バルブ本体ケース（７）側及びロウ付け姿勢保持具（１）側への伝熱を効果的に抑制することができる。従って、二回目以降のロウ付けをする際のワークの交換や、ロウ付け時の冷却を初回と同様に良好に行うことができる。   When opening the four air outlets (4) as described above, for example, gas is blown from the four air outlets (4) in a post-cooling step before and after the cooling cover body (2) is detached from the valve body case (7). Thus, the residual heat accumulated during brazing can be effectively removed, and heat transfer to the valve body case (7) side and the brazing posture holder (1) side can be effectively suppressed. Accordingly, it is possible to perform the work exchange at the time of the second and subsequent brazing and the cooling at the time of brazing as well as the first time.

上記のように移動機構（３０）及び装着状態検出機構（４０）を設ける場合、バルブ本体ケース（７）に対する冷却カバー体（２）の装着及び離脱を良好に行い得ると共に、その装着の良し悪しと冷却能力の良し悪しとを共に判定でき、効率的且つ適切なロウ付け管理が行える。   When the moving mechanism (30) and the mounting state detection mechanism (40) are provided as described above, the cooling cover body (2) can be mounted and removed with respect to the valve body case (7), and whether the mounting is good or bad. And whether the cooling capacity is good or bad can be determined, and efficient and appropriate brazing management can be performed.

上記のように遮熱炙り給線工程を経るロウ付け方法によれば、冷却カバー体（１）によりバルブ本体ケース（７）を強制的に冷却できながら、上向きの外側配管の端面（９０）側に向けて重力に沿ってロウ材を流し込むことができ、ロウ付けに伴う入熱を効果的に抑制できると共にロウ付けの難易度を低くでき、ロウ付け部分にロウ材を適量且つ均等に回すことができる。また、重力に沿って下向きにロウ材を流し込めるため、付属配管（８）の寸法バラツキ等を吸収できながらロウ材給線位置を柔軟に設定することができ、自動ロウ付けにも良好に適合させることができる。勿論、水没の必要もない。従って、信頼性の高いロウ付けが行え、仕上がりも綺麗になる。   As described above, according to the brazing method through the heat shielding and feeding process, the valve body case (7) can be forcibly cooled by the cooling cover body (1), while the end surface (90) side of the upward outer pipe facing upward. The brazing material can be poured in along the gravity, and the heat input accompanying brazing can be effectively suppressed and the difficulty of brazing can be reduced. Can do. In addition, since the brazing material can be poured downward along the gravity, the brazing material supply line position can be set flexibly while absorbing the dimensional variation of the attached pipe (8), and it is well suited for automatic brazing. Can be made. Of course, there is no need for submersion. Therefore, it is possible to perform brazing with high reliability and a beautiful finish.

また、上記のような後冷却工程を経ることにより、溶融状態にあるロウ材を吹き飛ばすことなく、ロウ付け時に蓄積された余熱を効果的に取り除くことができ、バルブ本体ケース（７）側等への伝熱を効果的に抑制することができ、二回目以降のロウ付けをする際のワークの交換や、ロウ付け時の冷却を初回と同様に良好に行うことができる。   Further, through the post-cooling step as described above, it is possible to effectively remove the residual heat accumulated during brazing without blowing off the molten brazing material, and to the valve body case (7) side or the like. The heat transfer can be effectively suppressed, and the workpiece can be exchanged during the second and subsequent brazing and the cooling during brazing can be performed as well as the first time.

図１に、ロウ付けの対象物たるワークの例として、永久磁石型ステッピングモータ直動式の空調機用電動弁を示す。そのバルブ本体ケース７は、厚肉のベース７１と薄肉の縦に長いドーム７２とから成り、内部に、外周に嵌合するステータユニット７０で駆動するマグネットロータ７３、その中心にブッシュ７３１を介して結合するニードル７４、その雄ネジ７４０に螺合する雌ネジ７５０をもつ下部ボス７５、ニードル７４の頭部７４１とバネ受７７１及びバネ７７０を介して突き合わせる弁棒７６、下部ボス７５のガイド穴７５１内を進退し且つニードル７４の頭部７４１をワッシャ７４２を介して受入れる弁棒７６と一体のバネボックス７７、弁棒７６の先端を突入させる弁座７８、ニードル７４の上部軸受７９１とマグネットロータ７３に一体のスライダー７３２を係合させる回転規制ガイド７９２とを支持する上部ステム７９を備える。   FIG. 1 shows a permanent magnet type stepping motor direct-acting motor-operated valve for an air conditioner as an example of a workpiece which is a brazing object. The valve body case 7 is composed of a thick base 71 and a thin long dome 72. A magnet rotor 73 is driven inside by a stator unit 70 fitted to the outer periphery, and a bush 731 is provided at the center thereof. A needle 74 to be coupled, a lower boss 75 having a female screw 750 to be screwed into the male screw 740, a valve rod 76 that abuts the head 74 of the needle 74 with a spring receiver 771 and a spring 770, and a guide hole in the lower boss 75. A spring box 77 integral with a valve rod 76 that advances and retreats in the head 751 and receives the head 741 of the needle 74 via a washer 742, a valve seat 78 that allows the tip of the valve rod 76 to enter, an upper bearing 791 of the needle 74, and a magnet rotor 73 is provided with an upper stem 79 that supports a rotation restricting guide 792 that engages an integral slider 732.

バルブ本体ケース７の軸方向一端に位置するベース７１の下部継手７１０には、弁座７８の出口側に連通する直管から成る付属配管８の第一配管８１を炉中ロウ付けにより一体化している。また、バルブ本体ケース７におけるベース７１の径方向側方開口部７１１には、弁座７８の入口側に連通し、側方突出部８２１、曲部８２２、第一配管８１と略平行状に延びる連続部８２３をもつ曲管から成る付属配管８の第二配管８２を同炉中ロウ付けにより一体化している。   In the lower joint 710 of the base 71 located at one end of the valve body case 7 in the axial direction, the first pipe 81 of the attached pipe 8 consisting of a straight pipe communicating with the outlet side of the valve seat 78 is integrated by brazing in the furnace. Yes. Further, the radial side opening 711 of the base 71 in the valve body case 7 communicates with the inlet side of the valve seat 78 and extends substantially in parallel with the side protrusion 821, the curved portion 822, and the first pipe 81. The second pipe 82 of the attached pipe 8 composed of a curved pipe having a continuous portion 823 is integrated by brazing in the furnace.

図２に示すように、バルブ本体ケース７に一体の付属配管８たる第一及び第二配管８１，８２の下端部は、外部配管９を構成する第一及び第二室外機配管９１，９２の各拡管部９００の内側に挿入される。ロウ付け時、各室外機配管９１，９２は、各拡管部９００を上に突き出した状態で、高さ調整可能な支持ロッド１０に支持する一対の開閉式ワークバサミ１１，１２をもつロウ付け姿勢保持具１に各支持され、付属配管８の挿入状態においてその挿入部即ちロウ付け部における外側配管となる拡管部９００の端面９０が上を向く所定のロウ付け姿勢が保たれる。   As shown in FIG. 2, the lower ends of the first and second pipes 81 and 82 that are integral with the valve body case 7 are the first and second outdoor unit pipes 91 and 92 that constitute the external pipe 9. It is inserted inside each expanded tube portion 900. At the time of brazing, each outdoor unit pipe 91, 92 has a pair of open / close-type work scissors 11, 12 that are supported by a height-adjustable support rod 10 with each expanded portion 900 protruding upward. A predetermined brazing posture is maintained in which the end surface 90 of the expanded pipe portion 900 that is supported by the holder 1 and is an outer pipe in the insertion portion, that is, the brazing portion, is inserted upward in the inserted state of the attached piping 8.

ロウ付け時、バルブ本体ケース７には、該ケース７の外周に巻回するパイプ状の本体コイル２１と、この本体コイル２１と連続し、バルブ本体ケース７の外周と第二配管８２の側方突出部８２１及び曲部８２２とに巻回するパイプ状の異形コイル２２とから成り、中空状のコイル内部に導管２００から導く冷却用気体としての冷却エアを流通させる冷却カバー体２を上部から装着し、該カバー体２によりバルブ本体ケース７を取り囲んで、強制冷却し、ロウ付け時の入熱を許容内に抑制できるようにしている。   At the time of brazing, the valve body case 7 includes a pipe-shaped body coil 21 wound around the outer periphery of the case 7, a continuous body coil 21, the outer periphery of the valve body case 7, and the side of the second pipe 82. The cooling cover body 2 which is composed of the pipe-shaped deformed coil 22 wound around the projecting portion 821 and the curved portion 822 and which circulates cooling air as cooling gas led from the conduit 200 into the hollow coil is mounted from above. Then, the cover body 2 surrounds the valve body case 7 and forcibly cools so that heat input during brazing can be suppressed within an allowable range.

冷却カバー体２における異形コイル２２の下流部内側には、第一配管８１の突出始端付近となる下部継手７１０に対応させて、異形コイル２２を流通してきた冷却エアの一部を吹き付ける二つの***２３１，２３２から成る第一冷気吹口２３を開口している。   Two small holes for blowing a part of the cooling air flowing through the deformed coil 22 in the cooling cover body 2 inside the downstream portion of the deformed coil 22 corresponding to the lower joint 710 near the protruding start end of the first pipe 81. A first cold air outlet 23 composed of 231 and 232 is opened.

また、異形コイル２２の下流に連続させる延長管２４、二股分岐継手２５、第一分岐管２６、細径のキャピラリーチューブ２７を経由し、その末端のキャピラリーチューブ２７の出口となる第二冷気吹口２８を、第二配管８２の突出始端付近となる側方突出部８２１の上面に対応させて開口している。   Further, a second cold air outlet 28 serving as an outlet of the capillary tube 27 at the end thereof is passed through an extension pipe 24, a bifurcated branch joint 25, a first branch pipe 26, and a small-diameter capillary tube 27 that are continued downstream of the deformed coil 22. Is opened in correspondence with the upper surface of the side protrusion 821 in the vicinity of the protrusion start end of the second pipe 82.

更に、第二配管８２の反曲げ側において異形コイル２２から露出する側方突出部８２１の上面に対応させて、冷却カバー体２を経由しない経路となる補助導管２９０から供給する補助冷却用の気体としての補助エアを吹き付ける補助吹口２９を開口している。尚、以下、この補助吹口２９からの補助エアの吹き付けを補助エアＯＮともいう。   Further, the auxiliary cooling gas supplied from the auxiliary conduit 290 serving as a path not passing through the cooling cover body 2 so as to correspond to the upper surface of the side protrusion 821 exposed from the deformed coil 22 on the opposite side of the second pipe 82. The auxiliary air outlet 29 for blowing auxiliary air is opened. Hereinafter, the blowing of auxiliary air from the auxiliary air outlet 29 is also referred to as auxiliary air ON.

尚、４０は、バルブ本体ケース７への冷却カバー体２の装着時、二股分岐継手２５の第二分岐管を構成し且つ先端をキャピラリーチューブ２７と同径に絞った吹管４０１と、これに符合する受管４０２とから成る装着状態検出機構であって、冷却カバー体２を流通してきた冷却エアの流出を検出することにより、その装着の良し悪し及び冷却能力の良し悪しを管理可能にしている。   Reference numeral 40 denotes a blow pipe 401 that constitutes a second branch pipe of the bifurcated branch joint 25 when the cooling cover body 2 is attached to the valve body case 7 and whose tip is narrowed to the same diameter as the capillary tube 27, and matches this. This is a mounting state detection mechanism composed of a receiving tube 402 that detects the outflow of cooling air that has circulated through the cooling cover body 2 to manage whether the mounting is good or bad and the cooling capacity is good or bad. .

また、冷却カバー体２における本体コイル２１及び異形コイル２２のコイル隙間は予めロウ付けにより埋めており、冷却カバー体２の全体は円筒と楕円筒とを縦につなげた二重筒を呈するものとし、冷却効果のロスを極力低減している。さらに、キャピラリーチューブ２７及び補助導管２９０と冷却カバー体２との間の接触部も予めロウ付けしており、全体の剛性を高めている。   In addition, the coil gap between the main body coil 21 and the deformed coil 22 in the cooling cover body 2 is previously filled by brazing, and the entire cooling cover body 2 assumes a double cylinder in which a cylinder and an elliptic cylinder are vertically connected. The loss of cooling effect is reduced as much as possible. Furthermore, the contact portion between the capillary tube 27 and the auxiliary conduit 290 and the cooling cover body 2 is also brazed in advance, thereby improving the overall rigidity.

図３に示すように、付属配管８を構成する第一配管８１及び第二配管８２の各ロウ付け部となる拡管部９００付近、及び、該拡管部９００付近から上方に変位する各上方部位の四箇所に対応させて、冷却カバー体２を経由しない経路となる後冷却導管４００から分配部４０１を介して分配供給する後冷却用の気体としての後冷却エアを吹き付ける四連吹口４を開口している。   As shown in FIG. 3, the vicinity of the expanded portion 900 serving as the brazed portion of each of the first piping 81 and the second piping 82 constituting the attached piping 8, and each upper portion displaced upward from the vicinity of the expanded portion 900. Corresponding to the four locations, the four blowout ports 4 for blowing the post-cooling air as the post-cooling gas distributed and supplied via the distribution unit 401 from the post-cooling conduit 400 that becomes a path not passing through the cooling cover body 2 are opened. ing.

図４に示すように、四連吹口４における上門第一吹口４１は第一配管８１の突出始端付近に位置する下部継手７１０近傍に、同下門第一吹口４２は第一配管８１のロウ付け部付近たる拡管部９００及びロウ付け姿勢補助具１の上面近傍に、同上門第二吹口４３は第二配管８２の突出始端に比較的近い曲部８２２近傍に、同下門第二吹口４４は第二配管８２のロウ付け部付近たる拡管部９００及びロウ付け姿勢保持具１の上面近傍に、それぞれ後冷却エアを同時に吹き付ける。尚、以下、この四連吹口４からの四箇所に対する後冷却エアの吹き付けを四連エアＯＮともいう。   As shown in FIG. 4, the upper gate first air outlet 41 in the quadruple air outlet 4 is near the lower joint 710 located near the protruding start end of the first pipe 81, and the lower gate first air outlet 42 is brazed to the first pipe 81. In the vicinity of the upper portion of the expanded portion 900 and the brazing posture assisting tool 1, the upper gate second air outlet 43 is in the vicinity of the curved portion 822 relatively close to the protruding start end of the second pipe 82, and the lower gate second air outlet 44 is The post-cooling air is simultaneously blown to the vicinity of the upper surface of the brazing portion 900 and the brazing posture holder 1 near the brazing portion of the second pipe 82. Hereinafter, the blowing of the post-cooling air from the four air outlets 4 to the four places is also referred to as four air ON.

図５に、冷却カバー体２等を含むバルブ配管ロウ付け装置１００のエア系統回路図を示す。装着状態検出機構４０の受管４０２は第一主切換弁Ｖ１１、逆止弁付流量調整弁Ｖ、フィルタＦを介して流量センサＦＳに接続される。また、このロウ付けを行う際、主に第一配管８１からの入熱影響を極力少なくするため、バルブ本体ケース７内で弁棒（７６；図１参照）を弁座（７８；図１参照）から離間させて第一及び第二配管８１，８２の間を貫通させるが、この貫通確認を行うため、第二室外機配管９２には窒素供給源Ｎを接続し、第一室外機配管９１は第一主切換弁Ｖ１１と可逆的に切換わる第一副切換弁Ｖ１２を経て流量センサＦＳに接続される。   FIG. 5 shows an air system circuit diagram of the valve pipe brazing device 100 including the cooling cover body 2 and the like. The receiving tube 402 of the mounting state detection mechanism 40 is connected to the flow rate sensor FS via the first main switching valve V11, the flow rate adjusting valve V with check valve, and the filter F. Further, when performing this brazing, in order to minimize the influence of heat input mainly from the first pipe 81 as much as possible, the valve stem (76; see FIG. 1) is placed in the valve body case 7 to the valve seat (78; see FIG. 1). The first and second pipes 81 and 82 are made to pass away from each other), and in order to confirm this penetration, a nitrogen supply source N is connected to the second outdoor unit pipe 92 and the first outdoor unit pipe 91 is connected. Is connected to the flow sensor FS via a first sub-switching valve V12 that reversibly switches to the first main switching valve V11.

冷却カバー体２の導管２００は、エアジェット３の冷風取出口３５に接続される。このエアジェット３は、ボルテックスチューブの原理を応用し、エア取入口３１から取り入れる高圧エアをエアジェット本体３２の内部で高速回転させながら軸方向に進行させて熱風と冷風に分け、熱風はサイレンサー３３に多数開口する熱風放出口３４から放出し、冷風を冷風取出口３５から取り出すものである。例えば、（株）重松製作所製造、トラスコ中山（株）発売の商品名エアジェットＡＪ−Ｃを用いている。   The conduit 200 of the cooling cover body 2 is connected to the cold air outlet 35 of the air jet 3. This air jet 3 applies the principle of a vortex tube, and high-pressure air taken in from the air intake 31 is axially advanced while rotating at high speed inside the air jet main body 32 to divide it into hot air and cold air. The hot air is discharged from the hot air discharge port 34 which is opened in large numbers, and the cold air is taken out from the cold air outlet 35. For example, the product name Airjet AJ-C manufactured by Shigematsu Seisakusho Co., Ltd. and sold by TRUSCO NAKAYAMA Co., Ltd. is used.

エアジェット３のエア取入口３１には、マスフローユニットに備えるエアコンプレッサ等から成る元エア供給源Ａから、第一所定圧例えば０．７ＭＰａ設定の第一フィルタ・レギュレータＦ１、第二所定圧例えば０．５５ＭＰａ設定の第二フィルタ・レギュレータＦ２、及び、第二切換弁Ｖ２を介して取り込むエアが導入される。尚、以下、このエア導入により冷却カバー体２に冷却用気体としての冷風を流通させることをエアジェットＯＮともいう。   The air intake 31 of the air jet 3 is supplied from an original air supply source A composed of an air compressor or the like provided in the mass flow unit, with a first predetermined pressure, for example, a first filter regulator F1 set to 0.7 MPa, a second predetermined pressure, for example, 0. Air introduced through the second filter / regulator F2 and the second switching valve V2 set to .55 MPa is introduced. Hereinafter, the introduction of air causes the cooling cover body 2 to circulate cool air as a cooling gas is also referred to as air jet ON.

エアジェット３及び冷却カバー体２は、導管２００部分に取り付けるジョイント２０１を介して昇降シリンダから成る移動機構３０の駆動部３００と連結され、所定範囲内を上昇及び下降する。その下降端位置では、丁度、冷却カバー体２がバルブ本体ケース７にすっぽりと装着され、適切な装着状態が実現される。下降端位置及び上昇端位置は、それぞれ、例えば駆動部３００と接触・非接触によりＯＮ／ＯＦＦするカバー下降端センサ及びカバー上昇端センサにより検出している。   The air jet 3 and the cooling cover body 2 are connected to the driving unit 300 of the moving mechanism 30 including a lifting cylinder through a joint 201 attached to the conduit 200 portion, and rise and fall within a predetermined range. At the descending end position, the cooling cover body 2 is exactly attached to the valve body case 7 and an appropriate attachment state is realized. The descending end position and the ascending end position are detected by, for example, a cover descending end sensor and a cover raising end sensor that are turned ON / OFF by contact / non-contact with the driving unit 300, for example.

補助導管２９０には、第三切換弁Ｖ３を介して第二フィルタ・レギュレータＦ２の出口エアを導入し、四連吹口４には、第四切換弁Ｖ４及び圧力センサＰＳを介して第一フィルタ・レギュレータＦ１の出口エアを導入するようにしている。圧力センサＰＳは、元エア供給源Ａからの元エア圧の監視に使う。   The auxiliary conduit 290 is supplied with the outlet air of the second filter / regulator F2 through the third switching valve V3, and the four outlets 4 are connected to the first filter and the pressure sensor PS through the fourth switching valve V4 and the pressure sensor PS. The outlet air of the regulator F1 is introduced. The pressure sensor PS is used for monitoring the original air pressure from the original air supply source A.

尚、エアジェット３のエア取入口３１と第二切換弁Ｖ２との間、及び、補助導管２９０と第三切換弁Ｖ３との間は、冷却カバー体２の上下動に対応させてフレキシブルなホース等で接続している。四連吹口４は移動しない固定位置に設置するが、四連吹口４と第四切換弁Ｖ４との間もフレキシブルなホース等で接続している。   A flexible hose between the air intake 31 of the air jet 3 and the second switching valve V2, and between the auxiliary conduit 290 and the third switching valve V3, corresponding to the vertical movement of the cooling cover body 2. Etc. are connected. The four air outlets 4 are installed at fixed positions where they do not move, but the four air outlets 4 and the fourth switching valve V4 are also connected by a flexible hose or the like.

図６に示すように、バルブ配管ロウ付け装置１００の作業テーブル１０１上には、ロウ付け姿勢保持具１、昇降可能な冷却コイル２及びエアジェット３、固定式の四連吹口４を所定位置に配置している。また、第一配管８１側及び第二配管８２側の各ロウ付け部に対応させて、それぞれ１８０°変位した各一対の第一バーナー口５１Ａ，５１Ｂ及び第二バーナー口５２Ａ，５２Ｂをもち、バーナーシリンダ５０により水平方向前後に進退するバーナー５、第一配管８１側のロウ付け部に第一給線コイル６１Ｃから第一給線モータ６１Ｍにより送り出すロウ材を供給し、第一給線シリンダ６１Ｓにより水平方向斜めに進退する第一給線具６１、第二配管８２側のロウ付け部に第二給線コイル６２Ｃから第二給線モータ６２Ｍにより送り出すロウ材を供給し、第二給線シリンダ６２Ｓにより水平方向斜めに進退する第二給線具６２を所定位置に配置している。   As shown in FIG. 6, on the work table 101 of the valve pipe brazing apparatus 100, a brazing posture holder 1, a cooling coil 2 that can be raised and lowered, an air jet 3, and a fixed quadruple outlet 4 are placed at predetermined positions. It is arranged. The burner has a pair of first burner ports 51A and 51B and second burner ports 52A and 52B displaced by 180 ° in correspondence with the brazing portions on the first pipe 81 side and the second pipe 82 side, respectively. The brazing material forward and backward in the horizontal direction by the cylinder 50 is supplied to the brazing portion on the first pipe 81 side, and the brazing material fed from the first feeder coil 61C by the first feeder motor 61M is supplied by the first feeder cylinder 61S. The brazing material fed from the second feeder coil 62C by the second feeder motor 62M is supplied to the first feeder 61 and the brazing portion on the second pipe 82 side that advance and retract diagonally in the horizontal direction, and the second feeder cylinder 62S. The second feeder 62 that moves forward and backward in the horizontal direction is arranged at a predetermined position.

尚、ＳＷは、バルブ配管ロウ付け装置１００による半自動ロウ付け作業を開始させる緑ランプＧＬ内蔵型の起動ボタン、ＥＷは、同半自動ロウ付け作業を非常停止させる赤ランプＲＬ及びブザー内蔵型の非常停止ボタンである。冷却コイル２及びエアジェット３が上昇端位置にあり、バーナー５並びに第一給線具６１及び第二給線具６２が後退位置にある図６の状態が、自動ロウ付け開始時の原点復帰状態である。   SW is a start button with a built-in green lamp GL for starting the semi-automatic brazing operation by the valve pipe brazing apparatus 100, and EW is an emergency stop with a red lamp RL and a buzzer built-in for emergency stop of the semi-automatic brazing operation. Button. The state of FIG. 6 in which the cooling coil 2 and the air jet 3 are at the ascending end position, and the burner 5 and the first feeder 61 and the second feeder 62 are in the retracted position is the origin return state at the start of automatic brazing. It is.

図７に示すように、以上のバルブ配管ロウ付け装置１００を用いた半自動ロウ付け方法では、先ず、ロウ付け姿勢保持具１により第一及び第二室外機配管９１，９２の各拡管部９００の端面が上に向いた状態でバルブ本体ケース７並びに第一及び第二配管８１，８２が支えられたワークセット準備完了状態で、起動ボタンＳＷを押す。これにより、冷却カバー体２が下降してバルブ本体ケース７に装着し、エアジェットＯＮにより各コイル２１，２２に流通させる冷却エアにより、バルブ本体ケース７、第一配管８１の突出始端付近、第二配管８２の側方突出部８２１及び曲部８２２が予冷される。   As shown in FIG. 7, in the semi-automatic brazing method using the above valve pipe brazing apparatus 100, first, the brazing posture holder 1 of each of the expanded parts 900 of the first and second outdoor unit pipes 91 and 92 is used. In the state where the valve body case 7 and the first and second pipes 81 and 82 are supported with the end face facing upward, the start button SW is pressed. As a result, the cooling cover body 2 is lowered and attached to the valve body case 7, and by the cooling air that flows through the coils 21 and 22 by air jet ON, the valve body case 7, the vicinity of the protruding start end of the first pipe 81, The side protrusions 821 and the curved portions 822 of the two pipes 82 are pre-cooled.

この予冷工程は、起動からバーナー５の点火までに要する２秒、その点火持続時間の２秒、バーナー５の前進に要する１秒の計５秒間継続し、この予冷により、電動弁側を十分に冷却し、冷却効果最大の状態でバーナー５による炙りが開始される。この予冷工程時点で、外気温２６℃に対し、吹管４０１の出口温度が１４℃〜８℃程度となる。   This pre-cooling process lasts 5 seconds, 2 seconds required from the start to ignition of the burner 5, 2 seconds of the ignition duration, and 1 second required for the advance of the burner 5. Cooling is started, and the burning by the burner 5 is started with the maximum cooling effect. At the time of this pre-cooling step, the outlet temperature of the blow tube 401 is about 14 ° C. to 8 ° C. with respect to the outside air temperature of 26 ° C.

また、予冷工程では、各室外機配管９２，９１を介した窒素供給及び流量センサＦＳによる流出流量測定による貫通確認を行い、内部の弁棒７６を介した伝熱が回避されているか否か判定している。この貫通確認により、第一及び第二配管８１，８２と各室外機配管９１，９２との間のワークのセットに問題がないか否かも判定できる。   Further, in the precooling process, nitrogen supply through each outdoor unit pipe 92, 91 and penetration check by measuring the outflow flow rate by the flow rate sensor FS are performed to determine whether heat transfer through the internal valve rod 76 is avoided. is doing. Whether or not there is a problem in the work set between the first and second pipes 81 and 82 and the outdoor unit pipes 91 and 92 can be determined by this penetration confirmation.

貫通確認後は、吹管４０１と受管４０２との符合によるエアジェットの流量判定に切換え、冷却能力が出ているか否かを監視すると共に、冷却カバー体２の変形や歪みによる装着不備の有無を監視できるようにしている。   After confirming the penetration, the flow is switched to the air jet flow determination based on the agreement between the blow tube 401 and the receiving tube 402, monitoring whether or not the cooling capacity has come out, and whether or not there is a mounting defect due to deformation or distortion of the cooling cover body 2. It can be monitored.

図８に示すように、次に、バーナー５の前進が完了すると、エアジェットＯＮによる強制冷却条件下、所定時間例えば１３秒について、第一及び第二配管８１，８２の各ロウ付け部を炙る。   As shown in FIG. 8, next, when the advancement of the burner 5 is completed, the brazed portions of the first and second pipes 81 and 82 are swung for a predetermined time, for example, 13 seconds under the forced cooling condition by the air jet ON. .

このとき、冷却カバー体２の各コイル２１，２２内に流通する低温のエアジェットにより、各コイル２１，２２と直接接触するバルブ本体ケース７の外周面並びに第二配管８２の側方突出部８２１及び曲部８２２の一部を冷却することができる。また、第一冷気吹口２３及び第二冷気吹口２８から吹き出す低温のエアにより、冷却カバー体２で覆いきれない第一配管８１の突出始端側及び第二配管８２の側方突出部８２１の上面側を冷却できると共に、ロウ付けに伴うバーナー炎が該炎に近い異形コイル２２の端部開口からバルブ本体ケース７側に進入するのを防ぐエアシールドの役目を発揮させることができる。   At this time, the outer peripheral surface of the valve body case 7 and the side protrusions 821 of the second pipe 82 that are in direct contact with the coils 21 and 22 by low-temperature air jets flowing through the coils 21 and 22 of the cooling cover body 2. In addition, a part of the curved portion 822 can be cooled. Further, the low temperature air blown out from the first cold air outlet 23 and the second cold air outlet 28 causes the protruding start end side of the first pipe 81 and the upper surface side of the side protruding portion 821 of the second pipe 82 that cannot be covered by the cooling cover body 2. As a result, the burner flame accompanying brazing can exert the role of an air shield that prevents the end of the deformed coil 22 close to the flame from entering the valve body case 7 side.

図９に示すように、バーナー５による炙り開始から所定時間例えば８秒後、バーナー５による炙り継続下、各給線シリンダ６１Ｓ，６２Ｓを前進させ、第一及び第二配管８１，８２の各ロウ付け部に、各給線具６１，６２からロウ材を給線する。各給線具６１，６２の前進に要する約１秒後、所定時間例えば４秒間にわたり、エアジェットによる強制冷却条件下、炙りながらのロウ材の給線がされる。   As shown in FIG. 9, after a predetermined time, for example, 8 seconds from the start of turning by the burner 5, the supply cylinders 61 </ b> S and 62 </ b> S are moved forward while the turning by the burner 5 is continued, and each row of the first and second pipes 81 and 82 is moved. A brazing material is fed from each of the feeders 61 and 62 to the attaching portion. After about 1 second required for the advancement of each of the wire feeders 61 and 62, the brazing material is fed while being rolled under a forced cooling condition by an air jet for a predetermined time, for example, 4 seconds.

このとき、上向きの各拡管部９００の端面９０に向け、重力に沿って下向きにロウ材を流し込むことができ、各拡管部９００の端面９０を中心とした各ロウ付け部分にロウ材を適量且つ均等に回すことができる。また、第一及び第二配管８１，８２の長さのバラツキや各拡管部９００の高さのバラツキを吸収できながら、ロウ材給線位置を各拡管部９００の端面９０の上方に柔軟に定めることができ、自動的な給線に良好に適合させることができる。   At this time, the brazing material can be poured downward along the gravity toward the end surface 90 of each of the expanded pipe portions 900 facing upward, and an appropriate amount of brazing material can be applied to each brazing portion around the end surface 90 of each of the expanded pipe portions 900. Can be turned evenly. Further, the brazing material supply line position is flexibly determined above the end surface 90 of each expanded pipe portion 900 while absorbing variations in the lengths of the first and second pipes 81 and 82 and the height variations of the expanded pipe portions 900. And can be well adapted to automatic feeders.

図１０に示すように、給線が終了すると、バーナー５を消火して後退させると共に、各給線具６１，６２を後退させ、これら後退に要する約１秒に続いて、ロウ材凝固のための所定時間例えば３秒のロウ材凝固時間を確保する。この凝固待ち工程では、四連吹口４を介した四連エアＯＮはせず、補助吹口２９を介した補助エアＯＮのみの作動とする。冷却カバー体２を介したエアジェットＯＮは継続中である。   As shown in FIG. 10, when the feeding is completed, the burner 5 is extinguished and retracted, and the feeders 61 and 62 are retracted, and for about 1 second required for the retracting, the brazing material is solidified. The brazing material solidification time of 3 seconds, for example, is secured. In this coagulation waiting process, the four airs are not turned on via the four air nozzles 4 and only the auxiliary air is turned on via the auxiliary air nozzles 29. The air jet ON via the cooling cover body 2 is continuing.

補助吹口２９を介した補助エアＯＮにより、伝熱影響の比較的大きい第二配管８２側からの入熱を補完的に抑制できると共に、第二配管８２の反曲げ側に露出する側方突出部８２１に吹き付けられて弾かれたエアにより異形コイル２２自体も冷却できる。しかも、第二配管８２のロウ付け部側には勢いの殺されたエアが抜けるだけであるため、ロウ材の吹き飛ばしも未然に防止でき、良好な仕上がりも担保できる。   By the auxiliary air ON via the auxiliary air outlet 29, the heat input from the second pipe 82 side having a relatively large heat transfer effect can be suppressed in a complementary manner, and the side protruding portion exposed to the opposite side of the second pipe 82 is exposed. The deformed coil 22 itself can also be cooled by the air blown and blown onto the 821. In addition, since air that has been killed by momentum only escapes to the brazing portion side of the second pipe 82, it is possible to prevent the brazing material from being blown out and to secure a good finish.

図１１に示すように、ロウ材凝固待ち工程の後、四連エアＯＮによる後冷却工程に移る。冷却カバー体２は、四連エアＯＮから所定時間例えば２秒後に上昇させ、バルブ本体ケース７から離脱させる。   As shown in FIG. 11, after the brazing material solidification waiting process, the process proceeds to a post-cooling process using four-unit air ON. The cooling cover body 2 is raised after a predetermined time, for example, 2 seconds from the quadruple air ON, and is detached from the valve body case 7.

このように、冷却カバー体２を離脱させる前後の後冷却工程でこの四連吹口４からエアを吹き付けることにより、ロウ付け時に蓄積された余熱を効果的に取り除くことができ、バルブ本体ケース７側及びロウ付け姿勢保持具１側への伝熱を効果的に抑制することができ、二回目以降のロウ付けをする際のワークの交換や、ロウ付け時の冷却を初回と同様に良好に行うことができる。   In this way, by blowing air from the four air outlets 4 in the post-cooling step before and after the cooling cover body 2 is removed, the residual heat accumulated during brazing can be effectively removed, and the valve body case 7 side In addition, the heat transfer to the brazing posture holder 1 can be effectively suppressed, and the replacement of the workpiece during the second and subsequent brazing and the cooling during the brazing are performed as well as the first time. be able to.

図１２に示すように、四連エアＯＮから所定時間例えば８秒後、再び窒素供給源Ｎからの窒素の供給による貫通確認をし、良しならこの時点でグリーンランプＧＬが点灯して自動運転の終了を知らせるが、貫通確認に要する約２秒後、吹管４０１からのバルブ本体ケース７の冷却に加えて、所定時間例えば１．５秒間にわたり、補助エアＯＮ及び四連エアＯＮを延長し、ワークを追加冷却する。   As shown in FIG. 12, a predetermined time, for example, 8 seconds after the quadruple air is turned on, again confirms penetration by supplying nitrogen from the nitrogen supply source N. If it is good, the green lamp GL is turned on at this point and automatic operation is started. After 2 seconds required for confirmation of penetration, in addition to cooling the valve body case 7 from the blow tube 401, the auxiliary air ON and quadruple air ON are extended for a predetermined time, for example, 1.5 seconds. Add cooling.

これにより、二回目移行のロウ付けに際し、初期冷却能力を十二分に確保できるようにしていると共に、ワークの手動交換に伴う火傷等の事故を確実に回避できるようにしている。尚、エアジェットＯＮは、自動運転終了後も所定時間例えば４５秒間継続する。   Thereby, at the time of brazing for the second transition, sufficient initial cooling capacity can be secured, and accidents such as burns due to manual replacement of the workpiece can be reliably avoided. Note that the air jet ON continues for a predetermined time, for example, 45 seconds even after the automatic operation ends.

図１３に示すように、第一及び第二室外機配管９１，９２へのロウ付け完成状態では、各拡管部９００の端面９０を覆うロウ付け部に、過不足なくロウ材９９が全周について均等状にまわり、余分なロウ材の垂れや付着も殆どない。   As shown in FIG. 13, in the brazed completion state to the first and second outdoor unit pipes 91 and 92, the brazing material 99 is not over and around the brazing part covering the end surface 90 of each expanded pipe part 900. It turns evenly and there is almost no dripping or sticking of excess brazing material.

図１４に、上記したロウ付け方法各工程を制御対象の作動状況と共に時系列に示す。   FIG. 14 shows each process of the brazing method described above together with the operation status of the controlled object in time series.

図１５に、横軸に、上記ロウ付け方法実施下の経過時間を、縦軸に、バルブ本体ケース７のベース７１とドーム７２の境界部分の外周面であって第二配管８２の突出始端から反時計方向に約１０ｍｍ変位した位置での測定温度をとった評価試験結果例を示す。これによれば、最高温度でも約６６℃程度に抑制できている。   In FIG. 15, the horizontal axis indicates the elapsed time under the brazing method, and the vertical axis indicates the outer peripheral surface of the boundary portion between the base 71 and the dome 72 of the valve body case 7 and from the protruding start end of the second pipe 82. An example of an evaluation test result obtained by taking a measurement temperature at a position displaced about 10 mm in the counterclockwise direction is shown. According to this, the maximum temperature can be suppressed to about 66 ° C.

図１６以下に上記バルブ配管ロウ付け方法の各工程を実現する自動制御プログラムのフローを示す。電源ＯＮによるプログラムの開始以後、起動ボタンＳＷのＯＮ待ち状態において、常時、圧力センサＰＳの検知による元エア圧が規定値例えば０．６ＭＰａ以上あるか否か（Ｓ１）、バーナー５等の制御対象物が原点復帰状態にあるか否かを判定している（Ｓ２）。   The flow of the automatic control program which implement | achieves each process of the said valve piping brazing method is shown below from FIG. After the start of the program by turning on the power, whether the original air pressure detected by the pressure sensor PS is always higher than a specified value, for example, 0.6 MPa (S1), or the control target of the burner 5, etc. It is determined whether or not the object is in the origin return state (S2).

前記ステップＳ１及びＳ２での条件具備を前提に、起動ボタンＳＷのＯＮを受理すると（Ｓ３）、バーナー５の点火を起動し（Ｓ４）、冷却カバー体２を下降させて（Ｓ５）、エアジェットＯＮの状況下でバルブ本体ケース７側に対する冷却を開始する（Ｓ６）。上限時間例えば２．５秒以内にカバー下降端センサのＯＮによる下降端位置の検出がない場合（Ｓ７）、赤ランプＲＬ及びブザーをＯＮして強制終了させる（Ｓ８）。   Assuming that the conditions in steps S1 and S2 are satisfied, when the activation of the start button SW is accepted (S3), the ignition of the burner 5 is activated (S4), the cooling cover body 2 is lowered (S5), and the air jet Under the ON state, cooling to the valve body case 7 side is started (S6). When the lower end position is not detected by turning on the cover lower end sensor within the upper limit time, for example, 2.5 seconds (S7), the red lamp RL and the buzzer are turned on to forcibly terminate (S8).

図１７に示すように、前記ステップＳ７で上限時間以内にカバー下降端センサのＯＮが判定されると、窒素供給源Ｎからの窒素供給による貫通確認を起動し（Ｓ９）、流量センサＦＳの検知に基づいて流量零又は流量不足により貫通不良が判定されると（Ｓ１０）、赤ランプＲＬ及びブザーをＯＮして強制終了させる（Ｓ１１）。   As shown in FIG. 17, when it is determined in step S7 that the cover lowering end sensor is ON within the upper limit time, penetration confirmation by nitrogen supply from the nitrogen supply source N is activated (S9), and the flow sensor FS is detected. If the penetration failure is determined based on zero or insufficient flow (S10), the red lamp RL and the buzzer are turned on to forcibly terminate (S11).

貫通確認により貫通良好が判定されると（Ｓ１０）、バーナーシリンダ５０を進出させることによりバーナー５を前進させ（Ｓ１２）、流量センサＦＳの検知に基づいてエアジェット流量が規定値例えば３．０Ｌ／ｍｉｎ以上あるか否かを判定し（Ｓ１３）、流量不足なら赤ランプＲＬ及びブザーをＯＮして強制終了させる（Ｓ１４）。   When good penetration is determined by the penetration confirmation (S10), the burner cylinder 50 is advanced to advance the burner 5 (S12). Based on the detection of the flow sensor FS, the air jet flow rate is a specified value, for example, 3.0 L / It is determined whether or not there is more than min (S13). If the flow rate is insufficient, the red lamp RL and the buzzer are turned on to forcibly terminate (S14).

図１８に示すように、前記ステップＳ１３でエアジェット流量が規定値以上あると判定されると、上限時間例えば２秒以内にバーナー５の前進を位置センサ等で検出しない場合（Ｓ１５）、赤ランプＲＬ及びブザーをＯＮして強制終了させるが（Ｓ１６）、上限時間以内にバーナー５の前進を検出すると（Ｓ１５）、例えば８秒間と定めた、予め任意に定める給線待ち時間の経過を待ち（Ｓ１７）、この後、各給線シリンダ６１Ｓ，６２Ｓを進出させると共に各給線モータ６１Ｍ，６２Ｍを正転させることにより各給線具６１，６２を前進させる（Ｓ１８）。   As shown in FIG. 18, when it is determined in step S13 that the air jet flow rate is equal to or greater than a specified value, the red lamp indicates that the advance of the burner 5 is not detected by the position sensor or the like within an upper limit time, for example, 2 seconds (S15). The RL and the buzzer are turned on to forcibly terminate (S16). However, when the advance of the burner 5 is detected within the upper limit time (S15), for example, a predetermined waiting time for a predetermined feeder line waiting time determined as 8 seconds is waited ( Thereafter, the feeders 61 and 62 are advanced by advancing the feeder cylinders 61S and 62S and causing the feeder motors 61M and 62M to rotate forward (S18).

上限時間例えば２秒以内に各給線具６１，６２の前進を位置センサ等で検出しない場合（Ｓ１９）、赤ランプＲＬ及びブザーをＯＮして強制終了させるが（Ｓ２０）、上限時間以内に各給線具６１，６２の前進を検出すると（Ｓ１９）、例えば４秒間と定めた、予め任意に定める給線時間について給線をする（Ｓ２１）。   When the advancement of each feeder 61, 62 is not detected by the position sensor or the like within an upper limit time, for example, 2 seconds (S19), the red lamp RL and the buzzer are turned on to forcibly terminate (S20). When the advancement of the feeders 61 and 62 is detected (S19), the feeders are fed for a predetermined feeder time that is set to, for example, 4 seconds (S21).

図１９に示すように、前記ステップＳ２１の後、上限時間例えば１５秒を超過してバーナー５による炙りが続くと（Ｓ２２）、赤ランプＲＬ及びブザーをＯＮして強制終了させるが（Ｓ２３）、上限時間の超過がない場合は（Ｓ２２）、例えば１３秒間と定めた、予め任意に定める炙り設定時間の経過を待ち（Ｓ２４）、この後、バーナー５を安全消火すると共に（Ｓ２５）、バーナーシリンダ５０を後退させることによりバーナー５を後退させる（Ｓ２６）。   As shown in FIG. 19, after the step S21, when the burner 5 continues to beat after exceeding the upper limit time, for example, 15 seconds (S22), the red lamp RL and the buzzer are turned on to forcibly terminate (S23). If the upper limit time is not exceeded (S22), for example, a predetermined turn setting time set to 13 seconds is awaited (S24), and then the burner 5 is safely extinguished (S25), and the burner cylinder The burner 5 is moved backward by retracting 50 (S26).

上限時間例えば３秒以内にバーナー５の後退を位置センサ等で検出しない場合（Ｓ２７）、赤ランプＲＬ及びブザーをＯＮして強制終了させるが（Ｓ２８）、上限時間以内にバーナー５の後退を検出すると（Ｓ２７）、各給線シリンダ６１Ｓ，６２Ｓを後退させると共に各給線モータ６１Ｍ，６２Ｍを逆転させることにより各給線具６１，６２を後退させる（Ｓ２９）。   If the position sensor or the like does not detect the backward movement of the burner 5 within the upper limit time, for example, 3 seconds (S27), the red lamp RL and the buzzer are turned on to forcibly terminate (S28), but the backward movement of the burner 5 is detected within the upper limit time. Then (S27), the feeder cylinders 61S, 62S are retracted and the feeder motors 61M, 62M are reversely rotated to reverse the feeders 61, 62 (S29).

図２０に示すように、前記ステップＳ２９の後、圧力センサＰＳの検知による元エア圧が規定値例えば０．６ＭＰａ以上ない場合（Ｓ３０）、赤ランプＲＬ及びブザーをＯＮして強制終了させるが（Ｓ３１）、元エア圧が規定値以上ある場合（Ｓ３０）、補助エアをＯＮし、補助吹口２９から補助エアを吹き付ける（Ｓ３２）。補助エアの経路に設ける流量センサ又は圧力センサ等により補助エア出力不良があると（Ｓ３３）、赤ランプＲＬ及びブザーをＯＮして強制終了させる（Ｓ３４）。   As shown in FIG. 20, after the step S29, when the original air pressure detected by the pressure sensor PS is not a predetermined value, for example, 0.6 MPa or more (S30), the red lamp RL and the buzzer are turned on to forcibly terminate ( S31) When the original air pressure is greater than or equal to the specified value (S30), the auxiliary air is turned on and the auxiliary air is blown from the auxiliary air outlet 29 (S32). If there is an auxiliary air output failure due to a flow sensor or pressure sensor provided in the auxiliary air path (S33), the red lamp RL and the buzzer are turned ON to forcibly terminate (S34).

補助エア出力不良がないと（Ｓ３３）、例えば３秒間に定めた、予め任意に定める四連エア待ち時間となるロウ材の凝固待ち時間の経過を待ち（Ｓ３５）、この後、四連エアをＯＮし、四連吹口４から四連エアを吹き付ける（Ｓ３６）。四連エアの経路に設ける流量センサ又は圧力センサ等により四連エア出力不良があると（Ｓ３７）、赤ランプＲＬ及びブザーをＯＮして強制終了させる（Ｓ３８）。   If there is no auxiliary air output failure (S33), for example, wait for the elapse of the solidification waiting time of the brazing material, which is a predetermined four-step air waiting time set in advance for 3 seconds (S35). The air is turned on, and four airs are blown from the four air nozzles 4 (S36). If there is a quadruple air output failure by a flow sensor or pressure sensor provided in the quadruple air path (S37), the red lamp RL and the buzzer are turned on to forcibly terminate (S38).

図２１に示すように、前記ステップＳ３７で四連エア出力不良がない場合、冷却カバー体２を上昇させ（Ｓ３９）、上限時間例えば３．５秒以内にカバー上昇端センサのＯＮによる上昇端位置の検出がない場合（Ｓ４０）、赤ランプＲＬ及びブザーをＯＮして強制終了させる（Ｓ４１）。   As shown in FIG. 21, when there is no quadruple air output failure in step S37, the cooling cover body 2 is raised (S39), and the rising end position by turning on the cover rising end sensor within the upper limit time, for example, 3.5 seconds. Is not detected (S40), the red lamp RL and the buzzer are turned on to forcibly terminate (S41).

上限時間以内にカバー上昇端センサがＯＮすると（Ｓ４０）、四連エアによる冷却時間が所定時間例えば８秒経過した後に（Ｓ４２）、窒素供給源Ｎからの窒素供給による貫通確認を再び起動し（Ｓ４３）、流量センサＦＳの検知に基づく流量零又は流量不足により貫通不良が判定されると（Ｓ４４）、赤ランプＲＬ及びブザーをＯＮして強制終了させる（Ｓ４５）。   When the cover rising end sensor is turned ON within the upper limit time (S40), after a lapse of a predetermined time, for example, 8 seconds (S42), the penetration confirmation by the nitrogen supply from the nitrogen supply source N is activated again (S42). If a penetration failure is determined due to zero flow rate or insufficient flow rate based on detection by the flow rate sensor FS (S44), the red lamp RL and the buzzer are turned on to forcibly terminate (S45).

図２２に示すように、前記ステップＳ４４で貫通良好が判定されると（Ｓ４４）、緑ランプＧＬを点灯させる（Ｓ４６）。この時点で、自動ロウ付けフローが終了することになるが、追冷却として補助エアＯＮ及び四連エアＯＮを所定時間例えば１．５秒間延長する（Ｓ４７）。この後、例えば６０秒とした上限時間以内に全自動フローが終了して原点復帰状態が判定されると（Ｓ４８）、一回分についての自動ロウ付け処理を終了する。ステップＳ４８で原点復帰状態の判定がない場合、赤ランプＲＬ及びブザーをＯＮして強制終了させる（Ｓ４９）。   As shown in FIG. 22, when the penetration is determined to be good in step S44 (S44), the green lamp GL is turned on (S46). At this time, the automatic brazing flow is finished, but the auxiliary air ON and the quadruple air ON are extended for a predetermined time, for example, 1.5 seconds as additional cooling (S47). Thereafter, when the fully automatic flow is finished within the upper limit time of 60 seconds, for example, and the origin return state is determined (S48), the automatic brazing process for one time is finished. If it is not determined in step S48 that the origin has been returned, the red lamp RL and the buzzer are turned on to forcibly terminate (S49).

尚、赤ランプＲＬ及びブザーをＯＮして強制終了させる非常停止サブルーチンでは、バーナー５を安全消火する共に、エアジェットＯＮ、補助エアＯＮ、四連エアＯＮによる冷却を所定時間について強制的に継続し、原点復帰状態に戻す。非常停止ボタンＥＷを押したときも、この非常停止サブルーチン処理を経る。   In the emergency stop subroutine where the red lamp RL and the buzzer are turned on and forcibly terminated, the burner 5 is safely extinguished, and cooling by air jet ON, auxiliary air ON, and quadruple air ON is forcibly continued for a predetermined time. Return to the home position return state. Even when the emergency stop button EW is pressed, the emergency stop subroutine process is performed.

本発明に係るロウ付けの対象となる電動弁の断面図。Sectional drawing of the motor operated valve used as the object of brazing which concerns on this invention. 本発明ロウ付け装置の一部を断面にした要部側面図。The principal part side view which made a part of this invention brazing apparatus the cross section. 同平面図。FIG. 同正面図。The front view. 本発明ロウ付け装置のエア系統回路図。The air system circuit diagram of this invention brazing apparatus. 本発明ロウ付け装置全体の平面図。The top view of the whole brazing apparatus of this invention. 本発明ロウ付け方法の第１工程説明図。1st process explanatory drawing of this invention brazing method. 同第２工程説明図。The 2nd process explanatory drawing. 同第３工程説明図。3rd process explanatory drawing. 同第４工程説明図。The 4th process explanatory drawing. 同第５工程説明図。The 5th process explanatory drawing. 同第６工程説明図。The 6th process explanatory drawing. 本発明に係るロウ付け完成品である電動弁の側面図。The side view of the motor operated valve which is the brazing completion product which concerns on this invention. 本発明ロウ付け方法の時系列工程図。The time series process figure of this invention brazing method. 本発明ロウ付け方法の温度評価試験結果図。The temperature evaluation test result figure of this invention brazing method. 本発明ロウ付け方法を実現する自動制御プログラムの第１フロー図。The 1st flowchart of the automatic control program which implement | achieves the brazing method of this invention. 同第２フロー図。The 2nd flow figure. 同第３フロー図。The 3rd flow figure. 同第４フロー図。FIG. 同第５フロー図。FIG. 同第６フロー図。The 6th flowchart. 同第７フロー図。The 7th flowchart.

符号の説明Explanation of symbols

１；ロウ付け姿勢保持具
２；冷却カバー体、２１；本体コイル、２２；異形コイル
３；エアジェット
４；四連吹口
５；バーナー
６１，６２；給線具
７；バルブ本体ケース
８；付属配管、８１；第一配管、８２；第二配管
９；外部配管、９１；第一室外機配管、９２；第二室外機配管
２３；第一冷気吹口、２８；第二冷気吹口、２９；補助吹口
３０；移動機構、４０；装着状態検出機構
８２１；側方突出部、８２２；曲部 DESCRIPTION OF SYMBOLS 1; Brazing attitude | position holder 2; Cooling cover body, 21; Main body coil, 22; Deformed coil 3; Air jet 4; Four nozzles 5; Burner 61, 62; , 81; first piping, 82; second piping 9; external piping, 91; first outdoor unit piping, 92; second outdoor unit piping 23; first cold air outlet, 28; second cold air outlet, 29; 30; Movement mechanism, 40; Wearing state detection mechanism 821; Side protrusion, 822;

Claims (8)

バルブ本体ケースに一体化された付属配管に外部配管をロウ付けするバルブ配管ロウ付け装置において、
前記付属配管と前記外部配管との挿入部における外側配管の端面が上を向く所定ロウ付け姿勢に保持させるロウ付け姿勢保持具と、
内部に冷却用気体を流通させ、装着時に前記バルブ本体ケースを取り囲んで該ケースを冷却する着脱自在な中空状の冷却カバー体と
を含むことを特徴とするバルブ配管ロウ付け装置。 In the valve piping brazing device that brazes external piping to the accessory piping integrated in the valve body case,
A brazing posture holder that holds the brazing posture in a predetermined bracing posture in which the end face of the outer pipe at the insertion portion of the accessory pipe and the external pipe faces upward;
A valve pipe brazing apparatus comprising: a detachable hollow cooling cover body that circulates a cooling gas inside and surrounds the valve main body case to cool the case when the gas is mounted. 前記付属配管は、前記バルブ本体ケースの軸方向一端に突出する第一配管と、前記バルブ本体ケースの径方向側方に突出し、曲部を介して前記第一配管と略平行状に延びる第二配管とから成り、
前記冷却カバー体は、前記バルブ本体ケースの外周に巻回するパイプ状の本体コイルと、この本体コイルと連続し、前記バルブ本体ケースの外周と前記第二配管の側方突出部及び曲部とに巻回するパイプ状の異形コイルとから成る請求項１記載のバルブ配管ロウ付け装置。 The accessory pipe includes a first pipe projecting at one axial end of the valve body case, and a second pipe projecting radially outward of the valve body case and extending substantially parallel to the first pipe via a curved portion. Consisting of piping,
The cooling cover body includes a pipe-shaped main body coil wound around the outer periphery of the valve main body case, the main body coil, and the outer periphery of the valve main body case, the side protrusions and the bent portions of the second pipe, The valve pipe brazing device according to claim 1, comprising a pipe-shaped deformed coil wound around the pipe. 前記第一配管の突出始端付近に対応させて、前記冷却カバー体を流通する冷却用気体の一部を吹き付ける第一冷気吹口を開口すると共に、前記第二配管の突出始端付近に対応させて、前記冷却カバー体を流通し且つ前記第一冷気吹口の下流から取り出す冷却用気体を吹き付ける第二冷気吹口を開口している請求項２記載のバルブ配管ロウ付け装置。   Corresponding to the vicinity of the projecting start end of the first piping, opening a first cold air outlet for blowing a part of the cooling gas flowing through the cooling cover body, and corresponding to the vicinity of the projecting start end of the second piping, The valve pipe brazing device according to claim 2, wherein a second cold air blowing port for blowing cooling gas that flows through the cooling cover body and is taken out from the downstream side of the first cold air blowing port is opened. 前記第二配管の反曲げ側において前記異形コイルから露出する側方突出部に対応させて、前記冷却カバー体を経由しない経路から供給する気体を吹き付ける補助吹口を開口している請求項２又は３記載のバルブ配管ロウ付け装置。   The auxiliary blower opening which blows the gas supplied from the path | route which does not pass through the said cooling cover body is opened corresponding to the side protrusion part exposed from the said deformed coil in the anti-bending side of said 2nd piping. The valve piping brazing device described. 前記第一配管及び前記第二配管における各ロウ付け部付近及び該各ロウ付け部付近から変位する部位の計四箇所に対応させて、前記冷却カバー体を経由しない経路から供給する気体を吹き付ける四連吹口を開口している請求項２又は３若しくは４記載のバルブ配管ロウ付け装置。   Corresponding to a total of four locations in the first pipe and the second pipe in the vicinity of each brazing part and parts displaced from the vicinity of each brazing part, the gas supplied from the path not passing through the cooling cover body is blown. The valve pipe brazing device according to claim 2, 3 or 4, wherein the continuous air outlet is opened. 前記冷却カバー体を前記バルブ本体ケースに対して装着状態と離脱状態との間で移動させる移動機構を設けると共に、前記装着状態において前記冷却カバー体を流通した冷却用気体の流出を検出する装着状態検出機構を設けている請求項１〜５何れか一記載のバルブ配管ロウ付け装置。   A mounting state in which a moving mechanism for moving the cooling cover body with respect to the valve body case between the mounted state and the detached state is provided, and an outflow state of the cooling gas flowing through the cooling cover body in the mounted state is detected. The valve piping brazing apparatus according to any one of claims 1 to 5, further comprising a detection mechanism. バルブ本体ケースに一体化された付属配管に外部配管をロウ付けするバルブ配管ロウ付け方法において、
前記付属配管と前記外部配管との挿入部における外側配管の端面が上を向く所定ロウ付け姿勢に保持させると共に、前記バルブ本体ケースに該ケースを取り囲む中空状の冷却カバー体を装着し、
この状態で前記冷却カバー体の内部に冷却用気体を流通させて前記バルブ本体ケースを冷却する強制気冷条件下、バーナーによる炙り及びロウ材の給線をする遮熱炙り給線工程を経ることを特徴とするバルブ配管ロウ付け方法。 In the valve piping brazing method that brazes external piping to the accessory piping integrated in the valve body case,
While maintaining the predetermined brazing posture in which the end face of the outer pipe in the insertion part of the auxiliary pipe and the external pipe faces upward, the hollow cooling cover body surrounding the case is attached to the valve body case,
In this state, under a forced air cooling condition in which a cooling gas is circulated inside the cooling cover body to cool the valve main body case, a heat-insulating ridge line supplying process is performed in which the burner is supplied and the brazing material is supplied. A valve pipe brazing method characterized by 前記遮熱炙り給線工程に続き、ロウ材凝固のための所定時間の経過を待ち、この後、ロウ付け部付近を含む前記付属配管に後冷却用の気体を吹き付ける後冷却工程を経る請求項７記載のバルブ配管ロウ付け方法。   A process of waiting for the elapse of a predetermined time for solidification of the brazing material following the heat shield winding line process, and thereafter performing a post-cooling process of blowing a gas for post-cooling to the attached pipe including the vicinity of the brazing part. 7. The valve piping brazing method according to 7.
JP2007269033A 2007-10-16 2007-10-16 Valve piping brazing device Expired - Fee Related JP4424684B2 (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108857001A (en) * 2018-09-19 2018-11-23 西南交通大学 A kind of argon arc welding welding robot weld seam backside gas protective device
CN111774742A (en) * 2019-04-03 2020-10-16 海信（浙江）空调有限公司 Device for welding air conditioner copper pipe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106903463A (en) * 2017-03-22 2017-06-30 苏州华越金属有限公司 A kind of electronic expansion valve for air conditioner component is without water conservation welding equipment and technique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108857001A (en) * 2018-09-19 2018-11-23 西南交通大学 A kind of argon arc welding welding robot weld seam backside gas protective device
CN111774742A (en) * 2019-04-03 2020-10-16 海信（浙江）空调有限公司 Device for welding air conditioner copper pipe

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