JP2005061577A - Fireproof valve - Google Patents

Fireproof valve Download PDF

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JP2005061577A
JP2005061577A JP2003295409A JP2003295409A JP2005061577A JP 2005061577 A JP2005061577 A JP 2005061577A JP 2003295409 A JP2003295409 A JP 2003295409A JP 2003295409 A JP2003295409 A JP 2003295409A JP 2005061577 A JP2005061577 A JP 2005061577A
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valve
thermal expansion
flow path
fluid flow
fireproof
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JP4233412B2 (en
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Mitsuji Kimura
充志 木村
Yosuke Ueda
陽介 植田
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Osaka Gas Co Ltd
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Osaka Gas Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire-proof valve of high reliability capable of surely and emergently sealing a fluid channel in the event of fire, and having high reliability for the prevention of secondary disaster. <P>SOLUTION: In this fireproof valve, a valve main body 5 is rotatably accommodated in a valve casing 3, an outer peripheral face 5b of the valve main body 5 is brought into contact with elastic seal members 8, 10 mounted in the valve casing 3 to seal the fluid channel L, when the valve main body 5 is rotated to a valve closing side, and further a thermal expansion member 13 mounted in the valve casing 3 is thermally expanded to emergently seal the fluid channel L, when the elastic seal members 8, 10 are heated in the valve closing state. The thermal expansion member 13 has the thermal expansion directionality by itself, and is mounted so that its thermally-expanding direction is an emergency sealing direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、バルブ本体が、弁箱内に回動操作自在に収容され、前記バルブ本体を閉弁側に回動操作することにより、そのバルブ本体の外周面が前記弁箱内に設けられた弾性シール部材に接触して流体流路を封止し、その閉弁状態において前記弾性シール部材が加熱されると、前記弁箱内に配置された熱膨張部材が熱膨張して前記流体流路を緊急封止するように構成されている耐火性バルブに関する。   In the present invention, the valve main body is accommodated in the valve box so as to be rotatable, and the valve main body is rotated to the valve closing side so that the outer peripheral surface of the valve main body is provided in the valve box. When the elastic seal member is heated in contact with the elastic seal member, and the elastic seal member is heated in the closed state, the thermal expansion member disposed in the valve box is thermally expanded, and the fluid flow path The present invention relates to a refractory valve configured to be urgently sealed.

このような耐火性バルブは、例えば、火災などによりバルブが高温下に曝されて弾性シール部材が加熱溶融した場合、熱膨張部材の熱膨張によって流体流路を緊急封止し、流体の流出による二次災害の発生を未然に防ぐためのものである。
そして、この種の耐火性バルブでは、従来、熱膨張部材として膨張黒鉛入りゴムを使用し、火災発生時、膨張黒鉛入りゴムの熱膨張によりバルブ本体と弁箱との間を封止して流体流路を緊急封止するように構成したものが知られている(例えば、特許文献1参照)。
Such a refractory valve, for example, when the valve is exposed to a high temperature due to a fire or the like and the elastic seal member is heated and melted, the fluid flow path is urgently sealed by the thermal expansion of the thermal expansion member, and the fluid flows out. This is to prevent the occurrence of secondary disasters.
In this type of fire-resistant valve, conventionally, a rubber containing expanded graphite is used as a thermal expansion member, and in the event of a fire, the space between the valve body and the valve box is sealed by the thermal expansion of the rubber containing expanded graphite. A configuration in which the flow path is urgently sealed is known (see, for example, Patent Document 1).

登録実用新案第2518806号公報(第1図)Registered Utility Model No. 2518806 (Fig. 1)

しかし、上記公報に記載のバルブでは、熱膨張部材としての膨張黒鉛入りゴムに関し、その熱膨張方向については何の考慮も払われていない。
すなわち、膨張黒鉛入りゴムは、通常、熱膨張性黒鉛粒子が、ほぼ一定の方向を向くように混入されてはおらず、いわゆる、未配向状態で混入されているため、熱膨張する際、あらゆる方向にほぼ均等に膨張する等方性膨張となる。
したがって、その等方性膨張の膨張黒鉛入りゴムにより流体流路を緊急封止する場合、どうしても信頼性に問題があり、この点に改良の余地がある。
However, in the valve described in the above publication, no consideration is given to the direction of thermal expansion of the expanded graphite-containing rubber as the thermal expansion member.
That is, the rubber with expanded graphite is usually not mixed so that the thermally expandable graphite particles are directed in a substantially constant direction, and is mixed in a so-called unoriented state, and therefore, in any direction when thermally expanding. Isotropic expansion that expands almost evenly.
Therefore, when the fluid flow path is urgently sealed with the expanded graphite-containing rubber having isotropic expansion, there is a problem in reliability, and there is room for improvement in this respect.

本発明は、このような従来の問題点に着目したもので、その目的は、火災発生時などにおいて、流体流路をより一層確実に緊急封止して、二次災害の発生を未然に防止することのできる信頼性の高い耐火性バルブを提供することにある。   The present invention pays attention to such a conventional problem, and its purpose is to prevent the occurrence of a secondary disaster in advance by more reliably urgently sealing the fluid flow path in the event of a fire. It is an object of the present invention to provide a highly reliable fireproof valve that can be used.

本発明の第1の特徴構成は、バルブ本体が、弁箱内に回動操作自在に収容され、前記バルブ本体を閉弁側に回動操作することにより、そのバルブ本体の外周面が前記弁箱内に設けられた弾性シール部材に接触して流体流路を封止し、その閉弁状態において前記弾性シール部材が加熱されると、前記弁箱内に配置された熱膨張部材が熱膨張して前記流体流路を緊急封止するように構成されている耐火性バルブであって、前記熱膨張部材が、それ自体で熱膨張方向性を具備し、その熱膨張方向が前記緊急封止方向を向くように配置されているところにある。   According to a first characteristic configuration of the present invention, a valve body is accommodated in a valve box so as to be freely rotatable. When the valve body is rotated to the valve closing side, an outer peripheral surface of the valve body is When the fluid flow path is sealed by contacting an elastic seal member provided in the box and the elastic seal member is heated in the closed state, the thermal expansion member disposed in the valve box is thermally expanded. A fireproof valve configured to urgently seal the fluid flow path, wherein the thermal expansion member has a thermal expansion direction by itself, and the thermal expansion direction is the emergency seal. It is located so as to face the direction.

本発明の第1の特徴構成によれば、閉弁状態で弾性シール部材が加熱された場合において、熱膨張によって流体流路を緊急封止するための熱膨張部材が、それ自体で熱膨張方向性を具備し、その熱膨張方向が前記緊急封止方向を向くように配置されているので、火災発生などの緊急時において、熱膨張部材は、流体流路の緊急封止方向に向けて確実に熱膨張する。
したがって、従来の耐火性バルブに比べて、流体流路の緊急封止機能が大幅に向上し、流体流路をより一層確実に封止して、信頼性の高い状態で二次災害の発生を未然に防止することができる。
According to the first characteristic configuration of the present invention, when the elastic seal member is heated in the valve-closed state, the thermal expansion member for urgently sealing the fluid flow path by thermal expansion is the thermal expansion direction by itself. Since the thermal expansion member is arranged so that the direction of thermal expansion faces the emergency sealing direction, the thermal expansion member is surely directed toward the emergency sealing direction of the fluid flow path in the event of an emergency such as a fire. Thermal expansion.
Therefore, the emergency sealing function of the fluid flow path is greatly improved compared to conventional fire-resistant valves, and the fluid flow path is sealed more reliably, so that secondary disasters can occur in a highly reliable state. It can be prevented in advance.

本発明の第2の特徴構成は、前記熱膨張部材が、前記緊急封止方向に開口する凹入溝内に配置されているところにある。   The 2nd characteristic structure of this invention exists in the place where the said thermal expansion member is arrange | positioned in the recessed groove opened in the said emergency sealing direction.

本発明の第2の特徴構成によれば、熱膨張部材が、前記緊急封止方向に開口する凹入溝内に配置されているので、熱膨張部材自体が具備する熱膨張方向性と、凹入溝による緊急封止方向へのガイド作用との協働によって、流体流路の緊急封止機能が更に向上し、二次災害の発生をより確実に防止することができる。   According to the second characteristic configuration of the present invention, since the thermal expansion member is disposed in the recessed groove that opens in the emergency sealing direction, the thermal expansion directionality of the thermal expansion member itself and the concave By cooperating with the guide action in the emergency sealing direction by the groove, the emergency sealing function of the fluid flow path is further improved, and the occurrence of a secondary disaster can be prevented more reliably.

本発明の第3の特徴構成は、前記凹入溝が、前記弁箱に穿設されて弁箱と一体的に形成されているところにある。   A third characteristic configuration of the present invention is that the recessed groove is formed in the valve box so as to be integrally formed with the valve box.

本発明の第3の特徴構成によれば、熱膨張部材を収納する凹入溝が、弁箱に穿設されて弁箱と一体的に形成されているので、例えば、凹入溝を別部材で構成して弁箱内に取り付けるのに比べて、構造的に簡単となり、しかも、弁箱内に凹入溝を穿つだけで済むため、バルブのコストダウンを図ることができる。   According to the third characteristic configuration of the present invention, the recessed groove for accommodating the thermal expansion member is formed in the valve box so as to be integrated with the valve box. Compared to the configuration and mounting in the valve box, the structure is simpler, and it is only necessary to form a recessed groove in the valve box, so that the cost of the valve can be reduced.

本発明の第4の特徴構成は、前記熱膨張部材が、円環状に構成されて前記バルブ本体の外周部に配置されるとともに縮径方向に熱膨張して、前記バルブ本体の球状外周部に接触して前記流体流路を緊急封止するように構成されているところにある。   According to a fourth characteristic configuration of the present invention, the thermal expansion member is configured in an annular shape and disposed on the outer peripheral portion of the valve main body and thermally expands in the direction of diameter reduction, thereby forming a spherical outer peripheral portion of the valve main body. It is configured to contact and urgently seal the fluid flow path.

本発明の第4の特徴構成によれば、熱膨張部材が、円環状に構成されてバルブ本体の外周部に配置されるとともに縮径方向に熱膨張して、バルブ本体の球状外周部に接触して流体流路を緊急封止するので、火災発生などの緊急時において、円環状の熱膨張部材は、その縮径方向に向けて確実に膨張し、バルブ本体の球状外周部を周りから締め付けて流体流路を確実に緊急封止する。   According to the fourth characteristic configuration of the present invention, the thermal expansion member is configured in an annular shape and disposed on the outer peripheral portion of the valve main body, and thermally expands in the diameter reducing direction to contact the spherical outer peripheral portion of the valve main body. The fluid flow path is urgently sealed, so that in the event of an emergency such as a fire, the annular thermal expansion member expands reliably in the direction of its diameter reduction, tightening the spherical outer periphery of the valve body from around Make sure the fluid flow path is urgently sealed.

本発明の第5の特徴構成は、前記熱膨張部材が、前記バルブ本体の外周部において前記流体流路の上流側と下流側に一対配置されているところにある。   According to a fifth characteristic configuration of the present invention, a pair of the thermal expansion members are arranged on the upstream side and the downstream side of the fluid flow path in the outer peripheral portion of the valve body.

本発明の第5の特徴構成によれば、円環状の熱膨張部材が、バルブ本体の外周部において流体流路の上流側と下流側に一対配置されているので、その一対の熱膨張部材がそれぞれ縮径方向に向けて膨張し、バルブ本体の球状外周部の2箇所において球状外周部を周りから締め付けて流体流路を緊急封止することになり、流体流路の緊急封止が一層確実となる。   According to the fifth characteristic configuration of the present invention, since a pair of annular thermal expansion members are arranged on the upstream side and the downstream side of the fluid flow path in the outer peripheral portion of the valve body, the pair of thermal expansion members are Each expands in the direction of reduced diameter, and the spherical outer periphery is tightened from the surroundings at two locations on the spherical outer periphery of the valve body to urgently seal the fluid flow path. It becomes.

本発明による耐火性バルブにつき、その実施例1〜実施例3を図面に基づいて順次説明する。
なお、各実施例に共通する部品や同じ作用を有する部品については、極力同じ符号を付し、また、重複説明を避けるため、すでに説明済みの部品などについては、原則的に同じ符号を付すことで説明を省略する。
Examples 1 to 3 of the fireproof valve according to the present invention will be sequentially described with reference to the drawings.
In addition, parts common to each embodiment and parts having the same action are denoted by the same reference numerals as much as possible, and in order to avoid redundant description, in principle, the same reference numerals are assigned to parts already described. The description is omitted.

実施例1による耐火性バルブは、図1〜図3に示すように、例えば、機器接続用のガス栓に組み込まれていて、第1流路L1を有するガス栓本体1に対し、第2流路L2を有するキャップ2が螺合され、ガス栓本体1とキャップ2により、内部に弁室を有する弁箱3が構成されている。
弁箱3を構成するキャップ2には、第3流路L3を有するナット部材4が相対回転自在に取り付けられ、第1〜第3流路L1〜L3によって、流体の一例である都市ガスやプロパンガスなどが図中矢印方向に沿って通流する流体流路Lが形成されている。
As shown in FIGS. 1 to 3, the fire-resistant valve according to the first embodiment is incorporated in, for example, a gas plug for device connection, and the second flow with respect to the gas plug main body 1 having the first flow path L <b> 1. A cap 2 having a path L2 is screwed together, and the gas stopper body 1 and the cap 2 constitute a valve box 3 having a valve chamber inside.
A nut member 4 having a third flow path L3 is attached to the cap 2 constituting the valve box 3 so as to be relatively rotatable, and city gas and propane, which are examples of fluids, are obtained by the first to third flow paths L1 to L3. A fluid flow path L through which gas or the like flows along the arrow direction in the figure is formed.

弁箱3内の弁室には、バルブ流路L4を有するバルブ本体5が回動自在に収容され、弁軸6の一端に形成された断面正方形の連結突起6aが、バルブ本体5に穿設された断面正方形の連結穴5aに嵌入され、弁軸6の他端には回動操作用のハンドル7が取り付けられていて、ハンドル7を介しての弁軸6の回動操作により、バルブ本体5が回動軸心P周りに回動するように構成されている。
弁箱3、ナット部材4、バルブ本体5、および、弁軸6などは、全て真鍮により形成され、弁箱3、バルブ本体5、および、弁軸6などにより耐火バルブが構成されている。
A valve body 5 having a valve flow path L4 is rotatably accommodated in a valve chamber in the valve box 3, and a connecting projection 6 a having a square cross section formed at one end of the valve shaft 6 is formed in the valve body 5. The valve shaft 6 is fitted in the connecting hole 5a having a square cross section, and a handle 7 for rotating operation is attached to the other end of the valve shaft 6. By rotating the valve shaft 6 through the handle 7, the valve body 5 is configured to rotate around the rotation axis P.
The valve box 3, the nut member 4, the valve main body 5, the valve shaft 6 and the like are all formed of brass, and the valve box 3, the valve main body 5, the valve shaft 6 and the like constitute a fireproof valve.

弁箱3内の弁室における上流側、つまり、第1流路L1側には、円環状の第1弾性シール部材8を嵌入保持する第1円環段部9が設けられ、弁室における下流側、つまり、第2流路L2側には、円環状の第2弾性シール部材10を嵌入保持する第2円環段部11が設けられている。
これら第1と第2の弾性シール部材8,10は、例えば、ポリテトラフルオロエチレン樹脂などの適度な弾性を有する合成樹脂により形成され、バルブ本体5の球状外周面5bに摺接して、バルブ本体5の球状外周面5bと弁箱3との間をシールするように構成されている。
A first annular step 9 for fitting and holding the annular first elastic seal member 8 is provided on the upstream side of the valve chamber in the valve box 3, that is, on the first flow path L1 side, and downstream of the valve chamber. On the side, that is, on the second flow path L2 side, a second annular step portion 11 that fits and holds the annular second elastic seal member 10 is provided.
These first and second elastic seal members 8 and 10 are made of, for example, a synthetic resin having an appropriate elasticity such as polytetrafluoroethylene resin, and are in sliding contact with the spherical outer peripheral surface 5b of the valve main body 5 to be in contact with the valve main body. 5 is configured to seal between the spherical outer peripheral surface 5b and the valve box 3.

第1円環段部9よりも回動軸心P寄りの部位には、バルブ本体5側に向かって開口する円環状の凹入溝12が穿設されて弁箱3と一体的に形成され、その凹入溝12内に円環状に構成された熱膨張部材13が挿入配置されている。
この熱膨張部材13は、例えば、NBRやCR系のゴムと黒鉛粒子などからなる熱膨張ゴムにより構成され、その熱膨張のメカニズムは、図5の(イ)に模式的に示すように、黒鉛層の間に層間化合物(硫酸)を含んだ熱膨張性黒鉛と呼ばれる物質があり、熱により層間化合物が体積膨張、気化して黒鉛を膨張させるのである。
An annular recessed groove 12 that opens toward the valve body 5 is formed in a portion closer to the rotational axis P than the first annular step 9 and is formed integrally with the valve box 3. The thermal expansion member 13 configured in an annular shape is inserted and disposed in the recessed groove 12.
The thermal expansion member 13 is made of, for example, a thermal expansion rubber made of NBR or CR rubber and graphite particles, and the mechanism of the thermal expansion is schematically shown in FIG. There is a substance called heat-expandable graphite containing an intercalation compound (sulfuric acid) between the layers, and the intercalation compound expands and vaporizes by heat to expand the graphite.

通常、その熱膨張ゴムは、図5の(ロ)に示すように、板状の熱膨張性黒鉛粒子が未配向状態に混入されており、そのため、あらゆる方向にほぼ均等に熱膨張する等方性膨張となるが、本発明の熱膨張ゴムは、図5の(ハ)に示すように、板状の熱膨張性黒鉛粒子がほぼ一定の方向を向くように配向状態に混入されていて、そのため、ある一定の方向に集中的に熱膨張する異方性膨張となる。
つまり、本発明の熱膨張ゴムは、それ自体で熱膨張方向性を具備していて、その熱膨張ゴムからなる熱膨張部材13の膨張方向が凹入溝12の開口側を向くようにして、熱膨張部材13が凹入溝12内に挿入配置されている。
そして、第2円環段部11よりも回動軸心P寄りの部位には、後述する緊急封止時にバルブ本体5が当接する受け面14が形成され、通常、その受け面14とバルブ本体5との間に若干の隙間が形成されるように設定されている。
Usually, as shown in FIG. 5B, the thermally expanded rubber is mixed with plate-like thermally expandable graphite particles in an unoriented state, and therefore isotropically expands almost uniformly in all directions. Although the thermal expansion rubber of the present invention is mixed in an oriented state so that the plate-like thermally expandable graphite particles face a substantially constant direction, as shown in FIG. For this reason, anisotropic expansion that intensively expands in a certain direction is obtained.
That is, the thermal expansion rubber of the present invention itself has a thermal expansion directionality so that the expansion direction of the thermal expansion member 13 made of the thermal expansion rubber faces the opening side of the recessed groove 12. A thermal expansion member 13 is inserted and disposed in the recessed groove 12.
A receiving surface 14 with which the valve body 5 abuts at the time of emergency sealing, which will be described later, is formed at a position closer to the rotational axis P than the second annular step portion 11. Usually, the receiving surface 14 and the valve body 5 is set so that a slight gap is formed between the two.

つぎに、この耐火性バルブの作用について説明する。
バルブ本体5は、上述したように、回動軸心P周りに回動操作自在に構成され、ハンドル7を開弁方向に回動操作することにより、図1に示すように、第1流路L1と第2流路L2が、バルブ本体5のバルブ流路L4を介して互いに連通して開弁状態となる。
逆に、ハンドル7を閉弁方向に回動操作すると、図2や図3に示すように、第1流路L1と第2流路L2が、バルブ本体5により遮断されて閉弁状態となり、このようにして、バルブ本体5の回動操作により開弁状態と閉弁状態とに切り換え操作自在に構成されている。
Next, the operation of this fireproof valve will be described.
As described above, the valve body 5 is configured to be freely rotatable around the rotation axis P, and by rotating the handle 7 in the valve opening direction, as shown in FIG. L1 and the second flow path L2 communicate with each other via the valve flow path L4 of the valve main body 5 to be in a valve open state.
Conversely, when the handle 7 is turned in the valve closing direction, as shown in FIGS. 2 and 3, the first flow path L1 and the second flow path L2 are blocked by the valve body 5 and are closed. In this way, the valve body 5 is configured to be freely switchable between a valve open state and a valve closed state by a rotation operation.

そして、耐熱性バルブの閉弁状態において、火災の発生により第1と第2の弾性シール部材8,10が加熱されると、円環状の熱膨張部材13が熱膨張方向、つまり、縮径方向に熱膨張し、バルブ本体5の球状外周面5bに接触して、たとえ両弾性シール部材8,10が溶融しても、流体流路Lを緊急封止するのである。
言い換えると、熱膨張部材13が、緊急封止方向に開口する凹入溝12内に配置され、しかも、その熱膨張方向が緊急封止方向を向くように配置されているので、火災発生時において、熱膨張部材13は、図4に示すように、縮径方向へ確実に熱膨張する。
この縮径方向への熱膨張により、熱膨張部材13がバルブ本体5の球状外周面5bに接触して挟持し、バルブ本体5が第2流路L2側へ少し移動して受け面14に当接し、その状態で球状外周面5bを確実に挟持して流体流路Lを緊急封止するのである。
When the first and second elastic seal members 8 and 10 are heated by the occurrence of a fire in the closed state of the heat resistant valve, the annular thermal expansion member 13 is in the thermal expansion direction, that is, in the diameter reduction direction. The fluid flow path L is urgently sealed even if both elastic seal members 8 and 10 are melted due to thermal expansion and contact with the spherical outer peripheral surface 5b of the valve body 5.
In other words, the thermal expansion member 13 is disposed in the recessed groove 12 that opens in the emergency sealing direction, and the thermal expansion direction is directed to the emergency sealing direction. As shown in FIG. 4, the thermal expansion member 13 surely thermally expands in the reduced diameter direction.
Due to the thermal expansion in the direction of the diameter reduction, the thermal expansion member 13 comes into contact with the spherical outer peripheral surface 5b of the valve body 5, and the valve body 5 slightly moves toward the second flow path L2 to contact the receiving surface 14. In this state, the spherical outer peripheral surface 5b is securely sandwiched and the fluid flow path L is urgently sealed.

実施例2による耐火性バルブは、図6および図7に示すように、例えば、ガス管接続用のガス栓に組み込まれ、実施例1と同様に、第1流路L1を有するガス栓本体1と第2流路L2を有するキャップ2により、内部に弁室を有する弁箱3が構成されて、弁箱3、バルブ本体5、および、弁軸6などにより耐火バルブが構成されている。
この実施例2の耐火性バルブが実施例1のものと異なる点は、第1環状段部9近傍の回動軸心P寄りの部位のみならず、第2環状段部11近傍の回動軸心P寄りの部位にも、バルブ本体5側に向かって開口する円環状の凹入溝12が穿設されて弁箱3と一体的に形成され、その凹入溝12内にも、その膨張方向を凹入溝12の開口側に向けた状態で、円環状の熱膨張部材13が挿入配置されている点である。
As shown in FIGS. 6 and 7, the fire-resistant valve according to the second embodiment is incorporated in, for example, a gas plug for connecting a gas pipe, and has a first flow path L <b> 1 as in the first embodiment. The cap 2 having the second flow path L2 constitutes a valve box 3 having a valve chamber therein, and the valve box 3, the valve body 5, the valve shaft 6 and the like constitute a fireproof valve.
The difference between the fireproof valve of the second embodiment and that of the first embodiment is that not only the portion near the rotation axis P near the first annular step 9 but also the rotation shaft near the second annular step 11 is used. An annular recessed groove 12 that opens toward the valve body 5 side is formed in a portion near the center P and is formed integrally with the valve box 3, and the expansion groove 12 is also expanded in the recessed groove 12. An annular thermal expansion member 13 is inserted and arranged in a state where the direction is directed to the opening side of the recessed groove 12.

すなわち、実施例2の耐火性バルブにおいては、熱膨張方向性を具備し、その熱膨張方向が緊急封止方向を向いた熱膨張部材13が、流体流路Lの上流側と下流側とに一対配置されている。
したがって、この実施例2の耐火性バルブでは、閉弁状態において、火災の発生で第1と第2の弾性シール部材8,10が加熱されると、一対の熱膨張部材13が、図8に示すように、縮径方向へ確実に熱膨張して、バルブ本体5の球状外周面5bを挟持して流体流路Lを緊急封止することになる。
That is, in the fire resistant valve of Example 2, the thermal expansion member 13 having the thermal expansion direction and the thermal expansion direction facing the emergency sealing direction is provided on the upstream side and the downstream side of the fluid flow path L. A pair is arranged.
Therefore, in the fireproof valve of the second embodiment, when the first and second elastic seal members 8 and 10 are heated by the occurrence of a fire in the closed state, the pair of thermal expansion members 13 are shown in FIG. As shown in the figure, the fluid flow path L is surely thermally expanded in the reduced diameter direction, and the fluid flow path L is urgently sealed by sandwiching the spherical outer peripheral surface 5b of the valve body 5.

実施例3による耐火性バルブは、図9および図10に示すように、例えば、機器接続用のガス栓に組み込まれ、実施例1や2と同様に、第1流路L1を有するガス栓本体1と第2流路L2を有するキャップ2により、内部に弁室を有する弁箱3が構成されて、弁箱3、バルブ本体5、および、弁軸6などにより耐火バルブが構成されている。
この実施例3の耐火性バルブでは、弁軸6の一端に板状の連結突起6bが形成されて、その板状連結突起6bが、バルブ本体5に穿設されたスリット状の連結穴5cに嵌入され、かつ、図10に示すように、閉弁状態において、板状連結突起6bとスリット状連結穴5cが、流体流路Lに沿うように構成されている。
As shown in FIGS. 9 and 10, the fire-resistant valve according to the third embodiment is incorporated in a gas plug for connecting devices, for example, and has a first flow path L1 as in the first and second embodiments. 1 and the cap 2 having the second flow path L2 constitute a valve box 3 having a valve chamber inside, and the valve box 3, the valve body 5, the valve shaft 6 and the like constitute a fireproof valve.
In the fireproof valve of the third embodiment, a plate-like connection projection 6 b is formed at one end of the valve shaft 6, and the plate-like connection projection 6 b is inserted into a slit-like connection hole 5 c formed in the valve body 5. As shown in FIG. 10, the plate-like connecting projection 6 b and the slit-like connecting hole 5 c are configured to follow the fluid flow path L in the valve-closed state.

そして、第2円環段部11よりも外側の部位には、緊急封止方向である流体流路Lの上流側に向かって開口する円環状の横向き凹入溝15が弁箱3に穿設されて、その横向き凹入溝15内に円環状に構成された熱膨張部材16が挿入配置されている。
この熱膨張部材16も、その熱膨張方向が緊急封止方向、つまり、横向き凹入溝15の開口側を向くように配置されて、第1円環段部9の回動軸心P側の角部が、バルブ本体5の当接によって流体流路Lを緊急封止するための封止面17に構成されている。
An annular laterally recessed groove 15 that opens toward the upstream side of the fluid flow path L that is the emergency sealing direction is formed in the valve box 3 at a portion outside the second annular step portion 11. Then, a thermal expansion member 16 having an annular shape is inserted and disposed in the laterally recessed groove 15.
The thermal expansion member 16 is also arranged so that the thermal expansion direction thereof faces the emergency sealing direction, that is, the opening side of the laterally recessed groove 15, and the first annular step portion 9 has a rotational axis P side. The corner portion is formed on a sealing surface 17 for urgently sealing the fluid flow path L by contact of the valve body 5.

この実施例3の耐火性バルブでは、閉弁状態において、火災の発生で第1と第2の弾性シール部材8,10が加熱されると、熱膨張部材16が、図11に示すように、横向き凹入溝15の開口側へ熱膨張して、バルブ本体5を流体流路Lの上流側へ押圧する。
その際、板状連結突起6bとスリット状連結穴5cが、流体流路Lに沿っているので、バルブ本体5のみが流体流路Lの上流側へスライドし、封止面17に当接して流体流路Lを緊急封止するのである。
In the fire-resistant valve of the third embodiment, when the first and second elastic seal members 8 and 10 are heated by the occurrence of a fire in the closed state, the thermal expansion member 16 is, as shown in FIG. The valve body 5 is thermally expanded toward the opening side of the laterally recessed groove 15 and presses the valve body 5 upstream of the fluid flow path L.
At that time, since the plate-like connection projection 6 b and the slit-like connection hole 5 c are along the fluid flow path L, only the valve body 5 slides upstream of the fluid flow path L and contacts the sealing surface 17. The fluid flow path L is urgently sealed.

以上、実施例1〜実施例3について説明したが、これら各実施例において下記のような種々の改変が可能である。   As mentioned above, although Example 1-Example 3 was demonstrated, in these each Example, the following various modifications are possible.

(1)実施例1と実施例2では、バルブ本体5側に向かって開口する凹入溝12内に熱膨張部材13を挿入配置した例を示し、実施例3では、横向き凹入溝15内に熱膨張部材16を挿入配置した例を示したが、これら熱膨張部材13,16については、必ずしも凹入溝12,15内に挿入配置する必要はなく、例えば、弁箱3内に設けた段部などに係合保持させることもできる。
また、凹入溝12,15内に挿入配置する場合、その凹入溝12,15は、これまでの実施例のように弁箱3に穿設するのではなく、弁箱3とは別体の部材により凹入溝を構成し、その凹入溝用の部材を弁箱3内に取り付けて実施することもできる。
(1) In Example 1 and Example 2, an example in which the thermal expansion member 13 is inserted and disposed in the recessed groove 12 that opens toward the valve body 5 side is shown. In Example 3, the laterally recessed groove 15 However, the thermal expansion members 13 and 16 are not necessarily inserted and disposed in the recessed grooves 12 and 15. For example, the thermal expansion members 13 and 16 are provided in the valve box 3. It can also be engaged and held on a stepped portion or the like.
Further, in the case of being inserted into the recessed grooves 12 and 15, the recessed grooves 12 and 15 are not formed in the valve box 3 as in the previous embodiments, but are separated from the valve box 3. It is also possible to form the recessed groove with the member and attach the recessed groove member to the valve box 3 for implementation.

(2)実施例1〜実施例3では、熱膨張部材13,16の一例として熱膨張性黒鉛粒子を含有する熱膨張ゴムを示したが、特に熱膨張ゴムに限るものではなく、また、弾性シール部材8,10をポリテトラフルオロエチレン樹脂から形成した例を示したが、弾性シール部材8,10についても、適度な弾性を備えた各種の材料で形成することができる。
さらに、この耐火性バルブは、都市ガスやプロパンガス用のバルブに限らず、二次災害のおそれがある各種の気体や液体用のバルブに適用することができる。
(2) In Examples 1 to 3, although the thermally expandable rubber containing thermally expandable graphite particles is shown as an example of the thermally expandable members 13 and 16, it is not particularly limited to the thermally expandable rubber. Although the example which formed the sealing members 8 and 10 from the polytetrafluoroethylene resin was shown, the elastic sealing members 8 and 10 can also be formed with various materials provided with moderate elasticity.
Furthermore, this fireproof valve is not limited to the valve for city gas and propane gas, but can be applied to valves for various gases and liquids that may cause a secondary disaster.

実施例1による耐火性バルブの縦断面図Longitudinal sectional view of a fireproof valve according to Example 1 実施例1による耐火性バルブの縦断面図Longitudinal sectional view of a fireproof valve according to Example 1 図2における要部のA−A断面図AA sectional view of the main part in FIG. 図3における要部の拡大図Enlarged view of the main part in FIG. 熱膨張部材の熱膨張のメカニズムを示す模式図Schematic diagram showing the mechanism of thermal expansion of the thermal expansion member 実施例2による耐火性バルブの縦断面図Longitudinal sectional view of a fireproof valve according to Example 2 実施例2による耐火性バルブの縦断面図Longitudinal sectional view of a fireproof valve according to Example 2 図7における要部のB−B断面図BB sectional view of the main part in FIG. 実施例3による耐火性バルブの縦断面図Longitudinal sectional view of a fireproof valve according to Example 3 実施例3による耐火性バルブの縦断面図Longitudinal sectional view of a fireproof valve according to Example 3 図10における要部の拡大図The enlarged view of the principal part in FIG.

符号の説明Explanation of symbols

3 弁箱
5 バルブ本体
5b バルブ本体の球状外周面
8,10 弾性シール部材
12,15 凹入溝
13,16 熱膨張部材
L 流体流路
3 Valve box 5 Valve body 5b Spherical outer peripheral surface of valve body 8, 10 Elastic seal member 12, 15 Recess groove 13, 16 Thermal expansion member L Fluid flow path

Claims (5)

バルブ本体が、弁箱内に回動操作自在に収容され、前記バルブ本体を閉弁側に回動操作することにより、そのバルブ本体の外周面が前記弁箱内に設けられた弾性シール部材に接触して流体流路を封止し、その閉弁状態において前記弾性シール部材が加熱されると、前記弁箱内に配置された熱膨張部材が熱膨張して前記流体流路を緊急封止するように構成されている耐火性バルブであって、
前記熱膨張部材が、それ自体で熱膨張方向性を具備し、その熱膨張方向が前記緊急封止方向を向くように配置されている耐火性バルブ。
A valve body is accommodated in the valve box so as to be rotatable. By rotating the valve body to the valve closing side, the outer peripheral surface of the valve body is attached to an elastic seal member provided in the valve box. When the elastic seal member is heated in the closed state, the thermal expansion member disposed in the valve box is thermally expanded to urgently seal the fluid flow path A refractory valve configured to:
The fire-resistant valve, wherein the thermal expansion member itself has a thermal expansion directionality, and is arranged so that the thermal expansion direction faces the emergency sealing direction.
前記熱膨張部材が、前記緊急封止方向に開口する凹入溝内に配置されている請求項1に記載の耐火性バルブ。   The fireproof valve according to claim 1, wherein the thermal expansion member is disposed in a recessed groove that opens in the emergency sealing direction. 前記凹入溝が、前記弁箱に穿設されて弁箱と一体的に形成されている請求項2に記載の耐火性バルブ。   The fireproof valve according to claim 2, wherein the recessed groove is formed in the valve box so as to be integrated with the valve box. 前記熱膨張部材が、円環状に構成されて前記バルブ本体の外周部に配置されるとともに縮径方向に熱膨張して、前記バルブ本体の球状外周部に接触して前記流体流路を緊急封止するように構成されている請求項1〜3のいずれか1項に記載の耐火性バルブ。   The thermal expansion member is configured in an annular shape and disposed on the outer peripheral portion of the valve body and thermally expands in the diameter reducing direction, and contacts the spherical outer peripheral portion of the valve main body to urgently seal the fluid flow path. The fireproof valve according to any one of claims 1 to 3, wherein the fireproof valve is configured to stop. 前記熱膨張部材が、前記バルブ本体の外周部において前記流体流路の上流側と下流側に一対配置されている請求項4に記載の耐火性バルブ。   The refractory valve according to claim 4, wherein a pair of the thermal expansion members are disposed on the upstream side and the downstream side of the fluid flow path in the outer peripheral portion of the valve body.
JP2003295409A 2003-08-19 2003-08-19 Fireproof valve Expired - Lifetime JP4233412B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006275124A (en) * 2005-03-29 2006-10-12 Shinwa Sangyo Co Ltd Gas cock for city gas
JP2009012272A (en) * 2007-07-04 2009-01-22 Sekisui Chem Co Ltd Manufacturing method of fire-resistant molded product, fire-resistant molded article made by the same and fireproofing structure
CN103335129A (en) * 2013-07-16 2013-10-02 北京艾迪西暖通科技有限公司 High-temperature high-pressure ball valve
CN115962305A (en) * 2023-01-03 2023-04-14 江苏麦科特种阀门科技有限公司 Intelligent rotary closing valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006275124A (en) * 2005-03-29 2006-10-12 Shinwa Sangyo Co Ltd Gas cock for city gas
JP2009012272A (en) * 2007-07-04 2009-01-22 Sekisui Chem Co Ltd Manufacturing method of fire-resistant molded product, fire-resistant molded article made by the same and fireproofing structure
CN103335129A (en) * 2013-07-16 2013-10-02 北京艾迪西暖通科技有限公司 High-temperature high-pressure ball valve
CN115962305A (en) * 2023-01-03 2023-04-14 江苏麦科特种阀门科技有限公司 Intelligent rotary closing valve

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