JP4214130B2 - Seal structure of on-off valve with poppet valve body - Google Patents

Seal structure of on-off valve with poppet valve body Download PDF

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JP4214130B2
JP4214130B2 JP2005155214A JP2005155214A JP4214130B2 JP 4214130 B2 JP4214130 B2 JP 4214130B2 JP 2005155214 A JP2005155214 A JP 2005155214A JP 2005155214 A JP2005155214 A JP 2005155214A JP 4214130 B2 JP4214130 B2 JP 4214130B2
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valve body
poppet valve
groove
poppet
valve
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JP2006329353A (en
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章 磯田
岳彦 川口
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株式会社アイビーエスジャパン
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Description

本発明は、ポペット弁体を有する開閉弁に関し、特にポペット弁体に設けられたシール部材のシール構造に関するものである。   The present invention relates to an on-off valve having a poppet valve body, and more particularly to a seal structure of a seal member provided on the poppet valve body.

従来、弁本体内にポペット弁体が軸方向に移動自在に介装されてなるポペット弁が提供されており、ポペット弁体に設けたシール部材を弁座に圧接させることで例えば流入経路を切り換えるようにしているものが提供されている（例えば、特許文献１参照）。
特開２０００−１８４００号公報 2. Description of the Related Art Conventionally, there has been provided a poppet valve in which a poppet valve body is interposed in a valve main body so as to be movable in the axial direction. What is doing is provided (for example, refer patent document 1).
JP 2000-18400 A

しかしながら、上記従来のものでは、ポペット弁体へのシール部材の取付けが手作業によって行っていることから、この取付けに時間と手間がかかって生産効率が悪く、この結果として生産コストの高騰を招いていた。   However, in the above-described conventional one, since the attachment of the seal member to the poppet valve body is performed manually, this attachment takes time and labor, resulting in poor production efficiency, resulting in an increase in production cost. It was.

また、ポペット弁体とシール部材とを例えば圧縮成形によって一体成形することは技術的に可能であるが、開閉弁としてはシール部材の剥がれなどがなく耐久性に優れ、しかも高い精度のシール性能が要求されるため、このような要求を満足した上で一体成形することは技術的に事実上困難であった。特に高精度小型化が要求される開閉弁への適用は非常に困難であった。   In addition, it is technically possible to integrally form the poppet valve body and the seal member by, for example, compression molding. However, as an on-off valve, the seal member is not peeled off and has excellent durability and high accuracy sealing performance. Therefore, it has been technically difficult to integrally mold while satisfying such requirements. In particular, it has been very difficult to apply to on-off valves that require high precision and downsizing.

本発明は、上記問題点に鑑みてなされたもので、その目的とするところは、ポペット弁体及びシール部材の形状を工夫することにより、優れた耐久性と高い精度のシール性能を確保した上でポペット弁体とシール部材との一体成形が可能で、生産効率の向上を図り生産コストを大幅に削減することができるポペット弁体を有する開閉弁のシール構造を提供することにある。   The present invention has been made in view of the above problems, and the object thereof is to secure excellent durability and highly accurate sealing performance by devising the shapes of the poppet valve body and the sealing member. Accordingly, it is an object of the present invention to provide a sealing structure for an on-off valve having a poppet valve body that can be integrally formed with a poppet valve body and a sealing member, can improve production efficiency, and can greatly reduce production costs.

上記の目的を達成するため、請求項１に係る発明のポペット弁体を有する開閉弁のシール構造は、弁本体内にポペット弁体が軸方向に移動自在に介装されてなるポペット弁体を有する開閉弁のシール構造であって、前記ポペット弁体の傘状に形成された弁体部の端面にはフランジ状の台座が形成され、この台座から弁体部の外周面に亘ってシール部材が成形手段によって一体形成されている。 In order to achieve the above object, a sealing structure for an on-off valve having a poppet valve body according to a first aspect of the present invention includes a poppet valve body in which a poppet valve body is interposed in a valve body so as to be movable in an axial direction. A sealing structure for an on-off valve having a flange-shaped pedestal formed on an end surface of the valve-shaped valve body portion of the poppet valve body, and a sealing member extending from the pedestal to the outer peripheral surface of the valve body portion Are integrally formed by molding means.

また、この発明のポペット弁体を有する開閉弁のシール構造は、前記台座のシール部材接合面には環状の第１溝が形成されるとともに、前記弁体部のシール部材接合面には環状の第２溝が形成されている。 Further, in the sealing structure of the on-off valve having the poppet valve body according to the present invention, an annular first groove is formed on the sealing member joining surface of the pedestal, and an annular member is formed on the sealing member joining surface of the valve body portion. second grooves are formed.

さらに、この発明のポペット弁体を有する開閉弁のシール構造は、前記シール部材は、その断面形状が前記第２溝からポペット弁体の軸方向と略直交方向に突出した後、湾曲状の凹部を描きながら前記第１溝に導かれている。 Furthermore, in the sealing structure of the on-off valve having the poppet valve body according to the present invention, the sealing member has a curved concave portion after its cross-sectional shape protrudes from the second groove in a direction substantially perpendicular to the axial direction of the poppet valve body. It is guided to the first groove while drawing.

本発明によれば、優れた耐久性と高い精度のシール性能を確保した上でポペット弁体とシール部材との圧縮成形による一体成形が可能になり、これにより生産効率の向上を図り生産コストを大幅に削減することができる   According to the present invention, it is possible to perform integral molding by compression molding of the poppet valve body and the seal member while ensuring excellent durability and highly accurate sealing performance, thereby improving production efficiency and reducing production cost. Can be greatly reduced

以下、本発明の実施の形態について図面を参照して説明する。なお、本実施の形態ではポペット弁体を有する開閉弁としてリリーフ弁を例に採り、このリリーフ弁のシール構造について説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a relief valve is taken as an example of an on-off valve having a poppet valve body, and the seal structure of this relief valve will be described.

図１は、リリーフ弁の構成を示している。   FIG. 1 shows the configuration of the relief valve.

このリリーフ弁１は、プラグ部３を有するプラグ側部材と、該プラグ部３が着脱自在に接合されるソケット側部材５とで構成された管継手に一体に組み込まれたもので、具体的にはプラグ側部材として一体的に組み込まれている。   This relief valve 1 is integrally incorporated in a pipe joint composed of a plug-side member having a plug portion 3 and a socket-side member 5 to which the plug portion 3 is detachably joined. Is integrated as a plug-side member.

上記リリーフ弁１は、図２及び図３に示すように、弁本体１１内にポペット弁体２が軸方向に移動可能に介装されている。   As shown in FIGS. 2 and 3, the relief valve 1 has a poppet valve body 2 interposed in a valve body 11 so as to be movable in the axial direction.

具体的には、弁本体１１は両端にフランジ部１１ａ、１１ｂが形成され、管内圧力作用側となる一方（図２及び図３において左方）のフランジ部１１ａからプラグ部３が突出するようにして当該弁本体１１と一体に設けられている。   Specifically, the valve body 11 is formed with flange portions 11a and 11b at both ends so that the plug portion 3 protrudes from the flange portion 11a on the one side (the left side in FIGS. 2 and 3) on the pipe pressure acting side. And is provided integrally with the valve body 11.

また、弁本体１１には、その軸心部に液体や気体などの適宜な流体が流れる流路１２が形成されている。流路１２は、上記プラグ部３側に形成された圧力流体の流入路１２ａと、この流入路１２ａよりも大径の逃がし路１２ｂとを有し、流入路１２ａと逃がし路１２ｂとが湾曲凹状に形成された連通路１２ｃを通じて連通されている。   Further, the valve body 11 is formed with a flow path 12 through which an appropriate fluid such as liquid or gas flows in the axial center portion thereof. The flow path 12 includes a pressure fluid inflow path 12a formed on the plug portion 3 side, and an escape path 12b having a larger diameter than the inflow path 12a. The inflow path 12a and the escape path 12b are curved and concave. Are communicated through a communication passage 12c.

ポペット弁体２は、軸部２１が上記流入路１２ａ内に配置されるとともに、傘状の弁体部２２が連通路１２ｃに配置されている。   The poppet valve body 2 has a shaft portion 21 disposed in the inflow path 12a and an umbrella-shaped valve body portion 22 disposed in the communication path 12c.

軸部２１の先端部寄りには、流入路１２ａ内を摺動自在なガイド２３が軸部２１に螺入されたナット２４によって抜け止めされる形で設けられている。   A guide 23 slidable in the inflow passage 12 a is provided near the tip of the shaft portion 21 so as to be prevented from being removed by a nut 24 screwed into the shaft portion 21.

また、流入路１２ａ内には上記ガイド２３をプラグ部３側に付勢するようにして軸部２１の外周にスプリング２５が設けられており、このスプリング２５によってポペット弁体２全体をプラグ部３側に付勢している。   In addition, a spring 25 is provided on the outer periphery of the shaft portion 21 so as to urge the guide 23 toward the plug portion 3 in the inflow passage 12a, and the entire poppet valve body 2 is connected to the plug portion 3 by the spring 25. Energized to the side.

弁体部２２の外周には、円環状のシール部材４が設けられており、前記スプリング２５によってポペット弁体２をプラグ部３側に付勢することで、シール部材４が連通路１２ｃに押圧され、これにより流入路１２ａと逃がし路１２ｂとの連通を遮断するようにしている。つまり、連通路１２ｃが弁座の機能を果たすようになっている。   An annular seal member 4 is provided on the outer periphery of the valve body portion 22, and the poppet valve body 2 is urged toward the plug portion 3 by the spring 25 so that the seal member 4 is pressed against the communication path 12 c. Thus, the communication between the inflow path 12a and the escape path 12b is blocked. That is, the communication path 12c functions as a valve seat.

従って、流入路１２ａ側にスプリング２５の付勢力に勝る流体の圧力が作用すると、ポペット弁体２がガイド２３に案内されながら逃がし路１２ｂ側に移動することになり、これによってシール部材４と連通路１２ｃとに生じた隙間を通じて流体を流入路１２ａ側から逃がし路１２ｃに逃がすようにしている。   Accordingly, when a fluid pressure that exceeds the urging force of the spring 25 acts on the inflow passage 12 a side, the poppet valve body 2 moves to the escape passage 12 b side while being guided by the guide 23, thereby communicating with the seal member 4. The fluid is allowed to escape from the inflow passage 12a side to the passage 12c through a gap generated in the passage 12c.

なお、ポペット弁体２の弁体部２２とシール部材４の具体的構造については後で詳説する。   The specific structures of the valve body 22 and the seal member 4 of the poppet valve body 2 will be described in detail later.

一方、プラグ部３は、その途中部に環状溝３１が形成されており、この環状溝３１にＯリング３２などのシール材が設けられている。   On the other hand, the plug portion 3 has an annular groove 31 formed in the middle thereof, and a sealing material such as an O-ring 32 is provided in the annular groove 31.

そして、プラグ部３の先端には、当該プラグ部３の一部を構成する形でフィルタ部材６が設けられている。   A filter member 6 is provided at the tip of the plug portion 3 so as to constitute a part of the plug portion 3.

フィルタ部材６は、図２及び図３に示すようにプラグ部３の先端に着脱自在に接続される接続部材７と、この接続部材７とでフィルタ８を保持する保持部材９とで構成されている。具体的には、図３に示すように接続部材７は、環状に形成されたもので、その内面にはプラグ部３の先端に形成された雄ねじ３３に螺入する雌ねじ７４が形成されている。そして、接続部材７の外周面には、一端から途中部にかけて径大となるテーパ面７１が形成されるとともに、他端部にフランジ７２が形成され、テーパ面７１とフランジ７２との間に環状の係止溝７３が形成されている。   2 and 3, the filter member 6 includes a connection member 7 that is detachably connected to the tip of the plug portion 3 and a holding member 9 that holds the filter 8 with the connection member 7. Yes. Specifically, as shown in FIG. 3, the connection member 7 is formed in an annular shape, and a female screw 74 that is screwed into a male screw 33 formed at the tip of the plug portion 3 is formed on the inner surface thereof. . A tapered surface 71 having a diameter increasing from one end to the middle is formed on the outer peripheral surface of the connecting member 7, and a flange 72 is formed at the other end, and an annular shape is formed between the tapered surface 71 and the flange 72. A locking groove 73 is formed.

保持部材９は、図３に示すように、上記接続部材７と同様に環状に形成されたもので、その内面が以下の役割を担うように段状に形成されている。まず、環状に形成された一端面９１の内側にフィルタ８を収容する収容部９２が形成されている。また、途中部にはこの保持部材９に接続部材７を嵌め込んだ際に係止溝７３内に係止する環状の係止片９３が形成され、この係止片９３の他端面側には接続部材７のフランジ７２が嵌め込まれる収容部９４が形成されている。   As shown in FIG. 3, the holding member 9 is formed in an annular shape like the connection member 7, and is formed in a step shape so that the inner surface plays the following role. First, the accommodating part 92 which accommodates the filter 8 is formed inside the one end surface 91 formed in an annular shape. Further, an annular locking piece 93 is formed in the middle portion to be locked in the locking groove 73 when the connection member 7 is fitted into the holding member 9. An accommodation portion 94 into which the flange 72 of the connection member 7 is fitted is formed.

従って、保持部材９内に接続部材７を押し込むことによって、係止片９３がテーパ面７１を摺接しながら係止溝７３に係止し、これにより両者を一体に接続する。この際、接続部材７が好適に撓みながら上述したように保持部材９に嵌合するように、当該接続部材７の周面には切欠７５を強度に支障をきたさない範囲で適数個形成している。   Therefore, by pushing the connecting member 7 into the holding member 9, the locking piece 93 is locked to the locking groove 73 while slidingly contacting the tapered surface 71, thereby connecting them together. At this time, an appropriate number of notches 75 are formed on the peripheral surface of the connecting member 7 within a range that does not hinder the strength so that the connecting member 7 is suitably bent while being fitted to the holding member 9 as described above. ing.

フィルタ８は、図４に示すようにメッシュフィルタであって、パッキン８１とカバー８２とによってサンドイッチ状に挟持された状態で前記収容部９２に配置される。   The filter 8 is a mesh filter as shown in FIG. 4, and is disposed in the accommodating portion 92 in a state of being sandwiched between a packing 81 and a cover 82.

パッキン８１は図５に示すようにリング状に形成され、また、カバー８２は例えば図６に示すように４つの通孔８２ａを有する円盤状に形成されている。   The packing 81 is formed in a ring shape as shown in FIG. 5, and the cover 82 is formed in a disk shape having four through holes 82a as shown in FIG. 6, for example.

従って、パッキン８１、フィルタ８、カバー８２を重ね合わせた状態で収容部９２に予め収容しておき、上述のように保持部材９に接続部材７を嵌入することで、これらフィルタ８等は保持部材９の一端面９１と接続部材７の一端面７ａとによってその周縁を挟持された状態で安定的に保持される。   Accordingly, the filter 8 and the like are held in the holding portion 92 in advance in a state where the packing 81, the filter 8 and the cover 82 are overlapped, and the connecting member 7 is inserted into the holding member 9 as described above. 9 and the one end surface 7a of the connection member 7 are stably held in a state where the peripheral edge thereof is sandwiched.

つまり、フィルタ８等を収容部９２に挿入して保持部材９に接続部材７を嵌め込むだけの簡単な作業によってフィルタ部材６を作製することができ、このフィルタ部材６をプラグ部３の先端にねじ込むことでリリーフ弁１に簡単に組み付けることができる。   That is, the filter member 6 can be produced by a simple operation of inserting the filter 8 or the like into the housing portion 92 and fitting the connecting member 7 into the holding member 9. It can be easily assembled to the relief valve 1 by screwing.

このようにフィルタ部材６をプラグ部３の一部分として組み付けることで、既存の形状を殆ど変えることなく簡単な形状のままで、フィルタ機能を持たせたリリーフ弁１を提供することができる。   By assembling the filter member 6 as a part of the plug portion 3 in this way, it is possible to provide the relief valve 1 having a filter function while keeping the existing shape almost unchanged.

前記ソケット側部材５は、図１に示すように接続側端部にフランジ５１が形成されるとともに、この端部内に前記プラグ部３が挿入可能な凹部５２が形成されている。このソケット側部材５は適宜な連結手段によって図示しない配管に連結されている。   As shown in FIG. 1, the socket side member 5 has a flange 51 formed at the connection side end portion, and a recess 52 into which the plug portion 3 can be inserted. The socket side member 5 is connected to a pipe (not shown) by appropriate connecting means.

また、前記リリーフ弁１の逃がし路１２ｃも適宜な連結手段によって図示しない配管に連結されている。   The relief passage 12c of the relief valve 1 is also connected to a pipe (not shown) by appropriate connecting means.

そして、リリーフ弁１とソケット側部材５との連結は、プラグ部３を凹部５２に差し込んで両者のフランジ１１ａ、５１を合致させ、この状態でこれらフランジ１１ａ、５１同士を図示しないファスナで挟み込んむ形で結合することによって行われる。   And connection with the relief valve 1 and the socket side member 5 inserts the plug part 3 in the recessed part 52, makes both flanges 11a and 51 correspond, and pinches | interposes these flanges 11a and 51 with the fastener which is not illustrated in this state. This is done by joining in form.

ところで、前述したポペット弁体２の弁体部２２とシール部材４とは、以下のような構造になっている。   By the way, the valve body part 22 and the seal member 4 of the poppet valve body 2 described above have the following structure.

弁体部２２は、図７に示すように、その端面にフランジ状の台座２６が形成されている。そして、台座２６のシール部材接合面となる弁体部連結側面（図７において左側面）に環状の第１溝２７が形成されるとともに、弁体部２２のシール部材接合面となる外周面途中部に環状の第２溝２８が形成されている。   As shown in FIG. 7, the valve body portion 22 has a flange-like base 26 formed on the end surface thereof. An annular first groove 27 is formed on the valve body connecting side surface (left side surface in FIG. 7) that becomes the sealing member joining surface of the pedestal 26, and in the middle of the outer peripheral surface that becomes the sealing member joining surface of the valve body portion 22. An annular second groove 28 is formed in the part.

一方、シール部材４は、ゴムや合成樹脂製の弾性体からなり、成形手段として例えば従来周知の圧縮成形によってポペット弁体２の弁体部２２に一体成形される。なお、圧縮成形は、ポペット弁体２を収容した金型の空間（キャビティ）においてゴムや合成樹脂を充填固化させることによって行われる。   On the other hand, the seal member 4 is made of an elastic body made of rubber or synthetic resin, and is integrally formed on the valve body portion 22 of the poppet valve body 2 by, for example, conventionally known compression molding as a molding means. The compression molding is performed by filling and solidifying rubber or synthetic resin in the space (cavity) of the mold in which the poppet valve body 2 is accommodated.

シール部材４の具体的形状は、図８に示すようにその断面外形状が前記第２溝２８からポペット弁体２の軸方向と略直交方向に突出した後、湾曲状の凹部を描きながら前記第１溝２７に導かれるように形成されている。つまり、このような外形状を有した上で第１溝２７内及び第２溝２８内に装填された状態で台座２６から弁体部２２の途中部に亘って配設されている。   As shown in FIG. 8, the specific shape of the seal member 4 is that the outer shape of the cross section projects from the second groove 28 in a direction substantially perpendicular to the axial direction of the poppet valve body 2, and then draws a curved recess. It is formed so as to be guided to the first groove 27. That is, it has such an outer shape and is disposed from the pedestal 26 to the middle part of the valve body portion 22 while being loaded in the first groove 27 and the second groove 28.

そして、第１溝２７側から外方に突出したシール部材４の先端部分４１が連通路１２ｃに圧接して流入路１２ａと逃がし路１２ｂとの連通を遮断するためのシール機能を発揮する部位になっており、この先端部分４１の先端は微小な円弧に形成されている。   The tip portion 41 of the seal member 4 projecting outward from the first groove 27 side is brought into pressure contact with the communication path 12c and exhibits a sealing function for blocking communication between the inflow path 12a and the escape path 12b. The tip of the tip portion 41 is formed in a minute arc.

弁体部２２及びシール部材４をこのような構造にすることで、優れた耐久性と高い精度のシール性能を確保した上で圧縮成形による一体成形が可能になる。   By making the valve body portion 22 and the seal member 4 in such a structure, it is possible to perform integral molding by compression molding while ensuring excellent durability and highly accurate sealing performance.

具体的には、弁体部２２の端面に台座２６を形成するとともに、第１溝２７及び第２溝２８を形成してシール部材４の両端面をこれら溝２７、２８に埋設した形で一体成形することで、弁体部２２に接合するシール部材４の両端面部位が露出しない状態で安定的に配設することができる。これによりシール部材４をこれら端面で剥がれやカケが起きにくい耐久性に優れた構造にすることができる。   Specifically, the pedestal 26 is formed on the end surface of the valve body 22, the first groove 27 and the second groove 28 are formed, and both end surfaces of the seal member 4 are integrally embedded in the grooves 27 and 28. By molding, both end portions of the seal member 4 joined to the valve body portion 22 can be stably disposed without being exposed. As a result, the sealing member 4 can be made to have a structure with excellent durability in which peeling and chipping hardly occur at these end faces.

また、シール部材４を上述したような特有な形状にすることで、材質自体の持つ弾性と相まって先端部分４１に好適な弾性を持たせることができ、これにより先端部分４１が良好な状態で連通路１２ｃに圧接して高いシール性能を確保することができるとともに、先端部分４１が連通路１２ｃから離間する際にもその弾性力が良好に作用して当該離間動作をスムーズに行うことができる。   In addition, by making the seal member 4 have a unique shape as described above, the tip portion 41 can have a suitable elasticity coupled with the elasticity of the material itself, so that the tip portion 41 is connected in a good state. It is possible to ensure high sealing performance by being pressed against the passage 12c, and when the tip portion 41 is separated from the communication passage 12c, the elastic force acts well and the separation operation can be performed smoothly.

さらに、シール部材４にセラミックコートなどのコーティングを施すことによって、高いシール性能を確保した上で長期に亘って離間動作をスムーズに行うことができ、耐久性の向上をさらに図ることができる。   Furthermore, by applying a coating such as a ceramic coat to the seal member 4, the separation operation can be performed smoothly over a long period of time while ensuring high sealing performance, and the durability can be further improved.

しかもこのリリーフ弁１は、上流側でフィルタ部材６により異物を除去しているので、異物の噛み込みや付着などによるシール性能の低下を防止でき、さらなる耐久性の向上を図ることができる。   In addition, since the foreign matter is removed from the relief valve 1 by the filter member 6 on the upstream side, the sealing performance can be prevented from being deteriorated due to the biting or adhering foreign matter, and the durability can be further improved.

なお、上述した実施形態は、あくまでも本発明の好適な実施態様を示すものであって、本発明はこれに限定されることなく、その範囲内において種々設計変更可能である。   Note that the above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope thereof.

例えば、開閉弁としてリリーフ弁について説明したが、ポペット弁体を備えた開閉弁であればいずれにも適用することができる。   For example, the relief valve has been described as the on-off valve, but any relief valve can be applied as long as it is equipped with a poppet valve element.

また、第１溝２７及び第２溝２８は、所望の耐久性や精度がクリアできるのであれば必ずしも必要ではない。   Moreover, the 1st groove | channel 27 and the 2nd groove | channel 28 are not necessarily required if desired durability and precision can be cleared.

さらに、成形手段としても圧縮成形だけに限らず、一体成形が可能であれば他の周知な成形方法を用いても良い。   Further, the molding means is not limited to compression molding, and other known molding methods may be used as long as integral molding is possible.

リリーフ弁を一体に組み込んだ管継手を示す断面図である。It is sectional drawing which shows the pipe joint which integrated the relief valve integrally. リリーフ弁を示す断面図である。It is sectional drawing which shows a relief valve. 同じくリリーフ弁を各構成部材に分解した状態を示す断面図である。It is sectional drawing which similarly shows the state which decomposed | disassembled the relief valve into each structural member. フィルタを示す正面図である。It is a front view which shows a filter. パッキンを示す正面図である。It is a front view which shows packing. カバーを示す正面図である。It is a front view which shows a cover. ポペット弁体を示す側面図である。It is a side view which shows a poppet valve body. シール部材の具体的形状を示す断面図である。It is sectional drawing which shows the specific shape of a sealing member.

符号の説明Explanation of symbols

１ リリーフ弁（開閉弁）
１１ 弁本体
２ ポペット弁体
２２ 弁体部
２６ 台座
２７ 第１溝
２８ 第２溝
４ シール部材 1 Relief valve (open / close valve)
11 Valve body 2 Poppet valve body 22 Valve body part 26 Base 27 First groove 28 Second groove 4 Seal member

Claims (1)

弁本体内にポペット弁体が軸方向に移動自在に介装されてなるポペット弁体を有する開閉弁のシール構造であって、
前記ポペット弁体の傘状に形成された弁体部の端面にはフランジ状の台座が形成され、この台座から弁体部の外周面に亘ってシール部材が成形手段によって一体形成され、
前記台座のシール部材接合面には環状の第１溝が形成されるとともに、前記弁体部のシール部材接合面には環状の第２溝が形成され、
前記シール部材は、その断面形状が前記第２溝からポペット弁体の軸方向と略直交方向に突出した後、湾曲状の凹部を描きながら前記第１溝に導かれてなることを特徴とするポペット弁体を有する開閉弁のシール構造。 A poppet valve body having a poppet valve body interposed in the valve body so as to be movable in the axial direction;
A flange-shaped pedestal is formed on the end face of the valve body part formed in an umbrella shape of the poppet valve body, and a sealing member is integrally formed by molding means from the pedestal to the outer peripheral surface of the valve body part,
An annular first groove is formed on the sealing member joining surface of the pedestal, and an annular second groove is formed on the sealing member joining surface of the valve body portion,
The seal member has a cross-sectional shape protruding from the second groove in a direction substantially orthogonal to the axial direction of the poppet valve body, and is then guided to the first groove while drawing a curved concave portion. A seal structure of an on-off valve having a poppet valve body .
JP2005155214A 2005-05-27 2005-05-27 Seal structure of on-off valve with poppet valve body Expired - Fee Related JP4214130B2 (en)

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DE102011079529A1 (en) * 2010-11-09 2012-05-10 Robert Bosch Gmbh Use of butyl rubber or silicone rubber, preferably fluorine-free silicone rubber for producing a sealing element at a proportional valve for controlling a gaseous medium, preferably hydrogen
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