JP2015075208A - Piping joint structure - Google Patents

Piping joint structure Download PDF

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JP2015075208A
JP2015075208A JP2013213361A JP2013213361A JP2015075208A JP 2015075208 A JP2015075208 A JP 2015075208A JP 2013213361 A JP2013213361 A JP 2013213361A JP 2013213361 A JP2013213361 A JP 2013213361A JP 2015075208 A JP2015075208 A JP 2015075208A
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pipe
union nut
pipe end
gas seal
tightening
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JP6177654B2 (en
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川口　健一
Kenichi Kawaguchi
健一 川口
恭子 福永
Kyoko Fukunaga
恭子 福永
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Hino Motors Ltd
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Hino Motors Ltd
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Abstract

PROBLEM TO BE SOLVED: To tighten a union nut in an exact and proper posture by reducing a load of a worker at initial hand-tightening while reducing resistance at a start of the tightening of the union nut, and by making the worker easily understand an allowance for finding an engagement state with a male screw part side in a stage of starting the tightening.SOLUTION: In a piping joint structure, a pipe end of an injection pipe 1 and a pipe end of common-rail side piping 2 are connected to each other in a union joint form, and a union nut 4 in which the joint portion is arranged while penetrating a bell-mouth shaped lip part 7 of a gas seal 6 is pushed into the lip part 7 in a tapered direction while expanding the lip part 7 of the gas seal 6 at tightening so that the air tightness is maintained. At a tip of the union nut 4, there are formed a straight part 11 having an outside diameter smaller than an initial diameter before the expansion of the lip part 7 of the gas seal 6, and a tapered part 12 having an outside diameter which is gradually expanded toward opposite to a tip side succeeding to the straight part, and can expand the lip part 7.

Description

本発明は、ガスシールのベルマウス状のリップ部を貫通して配置されるユニオン継手形式の配管継手構造に関するものである。   The present invention relates to a pipe joint structure of a union joint type that is disposed through a bell mouth-like lip portion of a gas seal.

近年におけるディーゼルエンジンでは、コモンレールに燃料を蓄圧して燃料噴射制御を電子制御で行うようにしているが、各気筒のインジェクタに燃料を導くインジェクションパイプがシリンダヘッドの内部に装備されているのに対し、コモンレールはシリンダヘッドの外部に搭載されるようになっているため、コモンレール側の配管とインジェクションパイプとをシリンダヘッドを貫通させて接続する必要がある。   In recent diesel engines, fuel is stored in a common rail and fuel injection control is performed electronically, whereas an injection pipe that directs fuel to the injector of each cylinder is equipped inside the cylinder head. Since the common rail is mounted outside the cylinder head, it is necessary to connect the common rail side pipe and the injection pipe through the cylinder head.

この際、シリンダヘッドの内部には、ディーゼルエンジンの圧縮行程と爆発行程においてピストンリングの間隙よりクランクケースへ漏れ出るブローバイガスが多くのオイルミストを含んだ状態で充満しているため、このブローバイガスが大気放出されないようシリンダヘッドの開口部にガスシールを介在させることで気密を保持した状態にしてコモンレール側の配管とインジェクションパイプとを接続させるようにしている。   At this time, the blow-by gas that leaks into the crankcase from the gap between the piston rings in the compression stroke and the explosion stroke of the diesel engine is filled with a lot of oil mist inside the cylinder head. In order to prevent air from being released into the atmosphere, a gas seal is interposed in the opening of the cylinder head so that the airtightness is maintained and the common rail side pipe and the injection pipe are connected.

即ち、図３及び図４に拡大して示す如く、インジェクションパイプ１の管端とコモンレール（図示せず）側の配管２の管端とのシリンダヘッド３を貫通して行われる接続には、以下に詳述する如きユニオン継手形式が採用されており、この種のユニオン継手形式にあっては、インジェクションパイプ１の管端に回動自在に外嵌装着されたソケット型のユニオンナット４（図中の符号４’はユニオンナット４の雌ネジ部を示す）を、コモンレール側の配管２の管端に形成したプラグ型の雄ネジ部５に締め込むことにより、前記インジェクションパイプ１の管端を前記コモンレール側の配管２の管端に突き合わせて接続する形式となっている。   That is, as shown in enlarged views in FIGS. 3 and 4, the connection made through the cylinder head 3 between the pipe end of the injection pipe 1 and the pipe end of the pipe 2 on the common rail (not shown) side is as follows. The union joint type as described in detail below is employed. In this type of union joint type, a socket-type union nut 4 (in the figure) is rotatably fitted around the pipe end of the injection pipe 1. 4 ′ indicates the female threaded portion of the union nut 4) and is tightened into a plug-shaped male threaded portion 5 formed at the pipe end of the pipe 2 on the common rail side, so that the pipe end of the injection pipe 1 is It is in the form of being connected to the pipe end of the pipe 2 on the common rail side.

そして、インジェクションパイプ１の管端とコモンレール側の配管２の管端との継手箇所が、シリンダヘッド３の開口部３ａに介装されたガスシール６におけるベルマウス状のリップ部７を貫通して配置されていると共に、前記ユニオンナット４が前記ガスシール６のリップ部７を押し拡げながら該リップ部７の窄まり方向（図中の左方向）へ締め込まれて気密が保持されるようにしてある。   And the joint location of the pipe end of the injection pipe 1 and the pipe end of the pipe 2 on the common rail side penetrates the bell mouth-like lip portion 7 in the gas seal 6 interposed in the opening 3 a of the cylinder head 3. The union nut 4 is tightened in the direction of squeezing of the lip portion 7 (left direction in the figure) while expanding the lip portion 7 of the gas seal 6 so that the airtightness is maintained. It is.

更に、前記インジェクションパイプ１の先端から所要長さ後退した位置には、ユニオンナット４の抜け止めを図る鍔部８が形成されており、コモンレール側の配管２の管端に形成したプラグ型の雄ネジ部５に前記ユニオンナット４を締め込んだ際に、ワッシャ９を介し鍔部８がユニオンナット４の後端部に係止されてインジェクションパイプ１の先端が前記雄ネジ部５の先端に押圧されるようになっている（図４参照）。   Further, a flange portion 8 for preventing the union nut 4 from coming off is formed at a position retracted by a required length from the tip of the injection pipe 1, and a plug type male formed at the pipe end of the pipe 2 on the common rail side. When the union nut 4 is tightened into the screw portion 5, the flange portion 8 is locked to the rear end portion of the union nut 4 via the washer 9, and the tip of the injection pipe 1 is pressed against the tip of the male screw portion 5. (See FIG. 4).

ここで、鍔部８とユニオンナット４の後端部との間に介装されているワッシャ９は、インジェクションパイプ１を前記ユニオンナット４の軸心位置に正しい姿勢で保持するように機能するものである。   Here, the washer 9 interposed between the flange portion 8 and the rear end portion of the union nut 4 functions to hold the injection pipe 1 in the correct position at the axial center position of the union nut 4. It is.

また、前記インジェクションパイプ１の鍔部８から先端にかけての範囲に先細りのテーパ形状が付されていると共に、コモンレール側の配管２における雄ネジ部５の先端には、前記インジェクションパイプ１の先端を対峙方向から受ける擂り鉢状の凹部１０が形成されており、該凹部１０に対し前記インジェクションパイプ１の先端が押圧された際に楔作用により両者の緊密な接触が図られるようにしてある。   In addition, a tapered shape is given in a range from the flange portion 8 to the tip of the injection pipe 1, and the tip of the injection pipe 1 is opposed to the tip of the male screw portion 5 in the pipe 2 on the common rail side. A bowl-shaped concave portion 10 is formed to be received from the direction, and when the tip of the injection pipe 1 is pressed against the concave portion 10, a close contact between the two is achieved by a wedge action.

尚、この種の配管継手構造に関連する先行技術文献情報としては下記の特許文献１等がある。   Incidentally, as prior art document information relating to this type of pipe joint structure, there is the following Patent Document 1 and the like.

特開平１０−１２２４５４号公報JP-A-10-122454

しかしながら、斯かる従来構造においては、コモンレール側の配管２の管端に形成したプラグ型の雄ネジ部５に前記ユニオンナット４を締め込むにあたり、図３に示す如きユニオンナット４の締め始めの段階からガスシール６のリップ部７に突き当たり、これを押し拡げながら締め込まなければならなかったため、その締め込み時にリップ部７側との摩擦力が大きな抵抗として加わることで初期手締め時の作業者の負担が大きくなるという問題があり、しかも、雄ネジ部５側との噛み合い状態を探る手加減が作業者に判り難いことから、ユニオンナット４が雄ネジ部５に対し斜めに締め込まれてしまっているのに、これに気づかないまま強引に締め込みを続けることでネジ山やリップ部７を損傷してしまう虞れもあった。   However, in such a conventional structure, when the union nut 4 is tightened into the plug-type male screw portion 5 formed at the pipe end of the pipe 2 on the common rail side, the union nut 4 as shown in FIG. Since the lip portion 7 of the gas seal 6 hit against the lip portion 7 and had to be tightened while being expanded, the friction force with the lip portion 7 side was added as a large resistance at the time of tightening, so that the worker at the time of initial manual tightening The union nut 4 is tightened diagonally with respect to the male screw portion 5 because the operator cannot easily understand how to engage with the male screw portion 5 side. However, there is a possibility that the screw thread and the lip portion 7 may be damaged by continuing to tighten firmly without noticing this.

本発明は上述の実情に鑑みてなしたもので、ユニオンナットの締め始めの抵抗を少なくして初期手締め時の作業者の負担を軽減し且つ締め始めの段階における雄ネジ部側との噛み合い状態を探る手加減を作業者に判り易くしてユニオンナットを確実に正しい姿勢で締め込み得るようにすることを目的とする。   The present invention has been made in view of the above situation, and reduces the resistance at the beginning of tightening of the union nut to reduce the burden on the operator at the time of initial hand tightening, and the meshing with the male screw portion side at the beginning of tightening It is an object of the present invention to make it easy for an operator to understand the state of the state and to ensure that the union nut can be tightened in the correct posture.

本発明は、接続すべき一方の管端に回動自在に外嵌装着されたソケット型のユニオンナットを、他方の管端に形成したプラグ型の雄ネジ部に締め込むことにより、前記一方の管端を前記他方の管端に突き合わせて接続するようにしたユニオン継手形式を採用し、その継手箇所がガスシールのベルマウス状のリップ部を貫通して配置され且つ前記ユニオンナットが締結時に前記ガスシールのリップ部を押し拡げながら該リップ部の窄まり方向へ押し込まれて気密が保持されるように構成された配管継手構造において、前記ユニオンナットの先端に前記ガスシールのリップ部の拡張前の初期径より小さな外径を成すストレート部を形成すると共に、該ストレート部に続き反先端側へ徐々に拡径して前記リップ部を押し拡げ得る外径となるテーパ部を形成したことを特徴とするものである。   In the present invention, a socket-type union nut that is rotatably fitted to one end of a pipe to be connected is tightened into a plug-type male thread formed on the other end of the pipe, thereby Adopting a union joint type in which the tube end is butted against the other tube end, the joint portion is disposed through the bell mouth-shaped lip portion of the gas seal, and the union nut is In the pipe joint structure configured to be pushed and expanded in the gas seal lip portion so as to be kept airtight, the gas seal lip portion is expanded at the tip of the union nut. The taper part which forms the straight part which comprises an outer diameter smaller than the initial diameter of this, and becomes an outer diameter which can be gradually expanded to an anti-tip side and can expand the lip part following the straight part It is characterized in that the formed.

而して、このようにすれば、他方の管端に形成したプラグ型の雄ネジ部にユニオンナットを締め込むにあたり、該ユニオンナットの締め始めの段階で先端のストレート部をガスシールのリップ部の内側に大きな抵抗なく差し入れて雄ネジ部との噛み合わせを図ることが可能となり、また、このようにしてユニオンナットを雄ネジ部と正常に噛み合わせた後に更に締め込むことでテーパ部により徐々にガスシールのリップ部を押し拡げ、該リップ部をユニオンナットの外周部に密着させて気密を保持させることが可能となる。   Thus, when the union nut is tightened into the plug-type male thread portion formed at the other pipe end, the straight portion at the tip is attached to the lip portion of the gas seal at the beginning of tightening of the union nut. It is possible to engage with the male screw part by inserting it into the inner side without great resistance. In addition, after the union nut is normally meshed with the male screw part, it is further tightened and gradually tightened by the taper part. The lip portion of the gas seal is pushed and expanded, and the lip portion is brought into close contact with the outer peripheral portion of the union nut, so that airtightness can be maintained.

また、本発明の配管継手構造をより具体的に実施するにあたっては、例えば、エンジンのシリンダヘッドの内部に装備されるインジェクションパイプの管端を一方の管端とし、前記シリンダヘッドの外部に搭載したコモンレール側の配管の管端を他方の管端として、これら両管端同士を前記シリンダヘッドの開口部にてガスシールを介し気密を保持した状態で接続したものに適用することが可能である。   Further, in carrying out the pipe joint structure of the present invention more specifically, for example, the pipe end of the injection pipe provided inside the cylinder head of the engine is set as one pipe end and is mounted outside the cylinder head. The pipe end of the pipe on the common rail side can be used as the other pipe end, and the both pipe ends can be connected to each other in an airtight state through a gas seal at the opening of the cylinder head.

上記した本発明の配管継手構造によれば、ユニオンナットの締め始めの段階で先端のストレート部をガスシールのリップ部の内側に大きな抵抗なく差し入れて雄ネジ部との噛み合わせを図ることができるので、ユニオンナットの締め始めの抵抗を少なくして初期手締め時の作業者の負担を大幅に軽減することができ、しかも、ユニオンナットの雄ネジ部側との噛み合い状態を探る手加減を作業者に判り易くさせることができるので、ユニオンナットを確実に正しい姿勢で締め込むことができ、ユニオンナットが雄ネジ部に対し斜めに締め込まれてしまっているのに気づかずに強引に締め込みを続けてネジ山やリップ部を損傷してしまうといった事態を未然に防止することができる等種々の優れた効果を奏し得る。   According to the above-described pipe joint structure of the present invention, the straight portion at the tip can be inserted into the inside of the lip portion of the gas seal without significant resistance at the beginning of tightening of the union nut, and can be engaged with the male screw portion. Therefore, it is possible to reduce the resistance at the beginning of tightening of the union nut and greatly reduce the burden on the operator at the time of initial hand tightening.In addition, the operator can easily adjust the engagement state with the male screw side of the union nut. The union nut can be securely tightened in the correct posture, and the union nut is tightened diagonally with respect to the male thread, so that it can be forcibly tightened without noticing. It is possible to obtain various excellent effects such as preventing a situation in which the screw thread and the lip portion are subsequently damaged.

本発明を実施する形態の一例を示す断面図である。It is sectional drawing which shows an example of the form which implements this invention. 図１のユニオンナットを最後まで締め込んだ状態を示す断面図である。It is sectional drawing which shows the state which tightened the union nut of FIG. 1 to the last. 従来例を示す断面図である。It is sectional drawing which shows a prior art example. 図３のユニオンナットを最後まで締め込んだ状態を示す断面図である。It is sectional drawing which shows the state which tightened the union nut of FIG. 3 to the last.

以下本発明の実施の形態を図面を参照しつつ説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１及び図２は本発明を実施する形態の一例を示すもので、図３及び図４と同一の符号を付した部分は同一物を表わしている。   FIG. 1 and FIG. 2 show an example of an embodiment for carrying out the present invention, and parts denoted by the same reference numerals as those in FIG. 3 and FIG.

図１び図２に示す如く、本形態例においては、図３及び図４の従来例の場合と同様に、インジェクションパイプ１の管端（一方の管端）とコモンレール側の配管２の管端（他方の管端）とをユニオン継手形式で接続する場合を示しており、インジェクションパイプ１の管端に回動自在に外嵌装着されたソケット型のユニオンナット４（図中の符号４’はユニオンナット４の雌ネジ部を示す）を、コモンレール側の配管２の管端に形成したプラグ型の雄ネジ部５に締め込むことにより、前記インジェクションパイプ１の管端を前記コモンレール側の配管２の管端に突き合わせて接続するようにしている。   As shown in FIGS. 1 and 2, in this embodiment, the pipe end (one pipe end) of the injection pipe 1 and the pipe end of the pipe 2 on the common rail side are the same as in the conventional example of FIGS. (The other pipe end) is connected in the form of a union joint, and a socket-type union nut 4 (reference numeral 4 'in the drawing is attached to the pipe end of the injection pipe 1 so as to be freely pivoted. The pipe end of the injection pipe 1 is connected to the pipe 2 on the common rail side by tightening the female thread part of the union nut 4 into a plug-type male screw part 5 formed on the pipe end of the pipe 2 on the common rail side. It is trying to connect to the end of the tube.

そして、インジェクションパイプ１の管端とコモンレール側の配管２の管端との継手箇所が、シリンダヘッド３の開口部３ａに介装されたガスシール６におけるベルマウス状のリップ部７を貫通して配置されるようになっていて、前記ユニオンナット４が前記ガスシール６のリップ部７を押し拡げながら該リップ部７の窄まり方向（図中の左方向）へ締め込まれて気密が保持されるようにしてあるが、前記ユニオンナット４の先端に前記ガスシール６のリップ部７の拡張前の初期径より小さな外径を成すストレート部１１を形成すると共に、該ストレート部１１に続き反先端側へ徐々に拡径して前記リップ部７を押し拡げ得る外径となるテーパ部１２を形成したところを特徴としている。   And the joint location of the pipe end of the injection pipe 1 and the pipe end of the pipe 2 on the common rail side penetrates the bell mouth-like lip portion 7 in the gas seal 6 interposed in the opening 3 a of the cylinder head 3. The union nut 4 is tightened in the squeezing direction (left direction in the figure) of the lip 7 while expanding the lip 7 of the gas seal 6 so that the airtightness is maintained. The straight portion 11 having an outer diameter smaller than the initial diameter of the lip portion 7 of the gas seal 6 is formed at the tip of the union nut 4, and the anti-tip is followed by the straight portion 11. It is characterized in that a tapered portion 12 having an outer diameter capable of expanding the diameter gradually toward the side and pushing and expanding the lip portion 7 is formed.

而して、このようにすれば、図１に示す如く、コモンレール側の配管２の管端に形成したプラグ型の雄ネジ部５にユニオンナット４を締め込むにあたり、該ユニオンナット４の締め始めの段階で先端のストレート部１１をガスシール６のリップ部７の内側に大きな抵抗なく差し入れて雄ネジ部５との噛み合わせを図ることが可能となり、また、図２に示す如く、このようにしてユニオンナット４を雄ネジ部５と正常に噛み合わせた後に、更に締め込むことでテーパ部１２により徐々にガスシール６のリップ部７を押し拡げ、該リップ部７をユニオンナット４の外周部に密着させて気密を保持させることが可能となる。   Thus, as shown in FIG. 1, when the union nut 4 is tightened into the plug-type male screw portion 5 formed at the pipe end of the pipe 2 on the common rail side, as shown in FIG. At this stage, it is possible to insert the straight portion 11 at the tip into the inside of the lip portion 7 of the gas seal 6 without great resistance and to engage with the male screw portion 5, and as shown in FIG. After the union nut 4 is normally meshed with the male thread portion 5, the lip portion 7 of the gas seal 6 is gradually expanded by the taper portion 12 by further tightening, and the lip portion 7 is extended to the outer peripheral portion of the union nut 4. It is possible to maintain airtightness by closely attaching to.

従って、上記形態例によれば、ユニオンナット４の締め始めの段階で先端のストレート部１１をガスシール６のリップ部７の内側に大きな抵抗なく差し入れて雄ネジ部５との噛み合わせを図ることができるので、ユニオンナット４の締め始めの抵抗を少なくして初期手締め時の作業者の負担を大幅に軽減することができ、しかも、ユニオンナット４の雄ネジ部５側との噛み合い状態を探る手加減を作業者に判り易くさせることができるので、ユニオンナット４を確実に正しい姿勢で締め込むことができ、ユニオンナット４が雄ネジ部５に対し斜めに締め込まれてしまっているのに気づかずに強引に締め込みを続けてネジ山やリップ部７を損傷してしまうといった事態を未然に防止することができる。   Therefore, according to the above embodiment, the straight portion 11 at the tip is inserted into the inside of the lip portion 7 of the gas seal 6 without great resistance at the beginning of tightening of the union nut 4 to engage with the male screw portion 5. Therefore, the resistance at the beginning of tightening of the union nut 4 can be reduced to greatly reduce the burden on the operator during initial hand tightening, and the meshing state of the union nut 4 with the male threaded portion 5 side can be reduced. Since the operator can easily understand how to search, the union nut 4 can be securely tightened in the correct posture, and the union nut 4 is tightened obliquely with respect to the male screw portion 5. It is possible to prevent a situation in which the screw thread and the lip portion 7 are damaged by continuously forcibly tightening without noticing.

尚、本発明の配管継手構造は、上述の形態例にのみ限定されるものではなく、必ずしもインジェクションパイプの管端とコモンレール側の配管の管端との接続に限定されないこと、その他、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   In addition, the pipe joint structure of the present invention is not limited to the above-described embodiment, and is not necessarily limited to the connection between the pipe end of the injection pipe and the pipe end of the pipe on the common rail side. Of course, various changes can be made without departing from the scope of the invention.

１ インジェクションパイプ
２ コモンレール側の配管
４ ユニオンナット
５ 雄ネジ部
６ ガスシール
７ リップ部
８ 鍔部
１１ ストレート部
１２ テーパ部 DESCRIPTION OF SYMBOLS 1 Injection pipe 2 Common rail side piping 4 Union nut 5 Male thread part 6 Gas seal 7 Lip part 8 Ridge part 11 Straight part 12 Tapered part

Claims (2)

接続すべき一方の管端に回動自在に外嵌装着されたソケット型のユニオンナットを、他方の管端に形成したプラグ型の雄ネジ部に締め込むことにより、前記一方の管端を前記他方の管端に突き合わせて接続するようにしたユニオン継手形式を採用し、その継手箇所がガスシールのベルマウス状のリップ部を貫通して配置され且つ前記ユニオンナットが締結時に前記ガスシールのリップ部を押し拡げながら該リップ部の窄まり方向へ押し込まれて気密が保持されるように構成された配管継手構造において、前記ユニオンナットの先端に前記ガスシールのリップ部の拡張前の初期径より小さな外径を成すストレート部を形成すると共に、該ストレート部に続き反先端側へ徐々に拡径して前記リップ部を押し拡げ得る外径となるテーパ部を形成したことを特徴とする配管継手構造。   By tightening a socket-type union nut that is rotatably fitted to one pipe end to be connected to a plug-type male thread formed on the other pipe end, the one pipe end is Adopting a union joint type that is connected to the other pipe end, the joint portion is disposed through the bell mouth-shaped lip portion of the gas seal, and the lip of the gas seal is disposed when the union nut is fastened. In the pipe joint structure configured to be pushed and expanded in the squeezing direction of the lip portion to maintain airtightness, the tip end of the union nut is more than the initial diameter before the lip portion of the gas seal is expanded. A straight portion having a small outer diameter was formed, and a taper portion was formed which gradually increased in diameter to the opposite end side following the straight portion and had an outer diameter capable of pushing and expanding the lip portion. Piping joint structure characterized and. エンジンのシリンダヘッドの内部に装備されるインジェクションパイプの管端を一方の管端とし、前記シリンダヘッドの外部に搭載したコモンレール側の配管の管端を他方の管端として、これら両管端同士を前記シリンダヘッドの開口部にてガスシールを介し気密を保持した状態で接続したものであることを特徴とする請求項１に記載の配管継手構造。   The pipe end of the injection pipe installed inside the cylinder head of the engine is one pipe end, and the pipe end of the common rail side pipe mounted outside the cylinder head is the other pipe end. 2. The pipe joint structure according to claim 1, wherein the pipe joint structure is connected in a state of being kept airtight through a gas seal at an opening of the cylinder head.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116085830A (en) * 2023-03-13 2023-05-09 中国空气动力研究与发展中心空天技术研究所 Lead hole sealing structure of combustion chamber flame tube wall thermocouple and dismounting method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05238251A (en) * 1992-02-28 1993-09-17 Nissan Motor Co Ltd Cooling unit and cap for vehicle air conditioner and installation thereof
JPH0653761U (en) * 1992-12-24 1994-07-22 日産ディーゼル工業株式会社 Sealing device for internal combustion engine
JP2001271818A (en) * 2000-03-24 2001-10-05 Isuzu Motors Ltd Sleeve nut
JP2002089407A (en) * 2000-07-11 2002-03-27 Hino Motors Ltd Fuel system for diesel engine
JP2005002806A (en) * 2003-06-09 2005-01-06 Usui Kokusai Sangyo Kaisha Ltd Joint structure of high pressure fuel injection pipe
JP2007261329A (en) * 2006-03-27 2007-10-11 Tokai Rubber Ind Ltd Elastic seal member for fuel tank
US20120210980A1 (en) * 2011-01-22 2012-08-23 Cummins Intellectual Property, Inc. Enclosure for high pressure fuel rail

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05238251A (en) * 1992-02-28 1993-09-17 Nissan Motor Co Ltd Cooling unit and cap for vehicle air conditioner and installation thereof
JPH0653761U (en) * 1992-12-24 1994-07-22 日産ディーゼル工業株式会社 Sealing device for internal combustion engine
JP2001271818A (en) * 2000-03-24 2001-10-05 Isuzu Motors Ltd Sleeve nut
JP2002089407A (en) * 2000-07-11 2002-03-27 Hino Motors Ltd Fuel system for diesel engine
JP2005002806A (en) * 2003-06-09 2005-01-06 Usui Kokusai Sangyo Kaisha Ltd Joint structure of high pressure fuel injection pipe
JP2007261329A (en) * 2006-03-27 2007-10-11 Tokai Rubber Ind Ltd Elastic seal member for fuel tank
US20120210980A1 (en) * 2011-01-22 2012-08-23 Cummins Intellectual Property, Inc. Enclosure for high pressure fuel rail

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116085830A (en) * 2023-03-13 2023-05-09 中国空气动力研究与发展中心空天技术研究所 Lead hole sealing structure of combustion chamber flame tube wall thermocouple and dismounting method thereof

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