JP5122234B2 - Fluid pipe closing structure - Google Patents
Fluid pipe closing structure Download PDFInfo
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- JP5122234B2 JP5122234B2 JP2007267103A JP2007267103A JP5122234B2 JP 5122234 B2 JP5122234 B2 JP 5122234B2 JP 2007267103 A JP2007267103 A JP 2007267103A JP 2007267103 A JP2007267103 A JP 2007267103A JP 5122234 B2 JP5122234 B2 JP 5122234B2
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- stem
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- valve seat
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- 239000012530 fluid Substances 0.000 title claims description 76
- 230000002093 peripheral effect Effects 0.000 claims description 34
- 239000000758 substrate Substances 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 description 38
- 230000000694 effects Effects 0.000 description 10
- 239000007788 liquid Substances 0.000 description 10
- 230000001771 impaired effect Effects 0.000 description 8
- 230000006866 deterioration Effects 0.000 description 7
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 239000012263 liquid product Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- CBVWMGCJNPPAAR-HJWRWDBZSA-N (nz)-n-(5-methylheptan-3-ylidene)hydroxylamine Chemical compound CCC(C)C\C(CC)=N/O CBVWMGCJNPPAAR-HJWRWDBZSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000021056 liquid food Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Lift Valve (AREA)
Description
本発明は流体管路の閉止構造に係り、特に、各種の液体製品を製造し処理するサニタリープラントにおける管路に使用される流体管路の閉止構造に関する。 The present invention relates to a fluid pipe line closing structure, and more particularly, to a fluid pipe line closing structure used for a pipe line in a sanitary plant for manufacturing and processing various liquid products.
一般に、液体食品又は医薬品を製造するサニタリープラントにおいては、液体管路の開口部を開閉するために、上記開口部に設けられた弁座と、上記弁座を当接及び離間する弁棒が設けられている。 In general, in a sanitary plant that manufactures liquid foods or pharmaceuticals, a valve seat provided in the opening and a valve rod for contacting and separating the valve seat are provided to open and close the opening of the liquid conduit. It has been.
従来、弁棒と弁座との間のシール性を向上させる観点から、弁棒は上記弁棒先端に設けられた２つのシール部材が夫々弁座に圧接するように構成され、１つのシール部材が破損した場合であっても、閉止された管路への各種液体製品の漏れを防止するような流体管路の閉止構造が従来より提案されている（特許文献１）。
図６に示すように、従来の二重シール弁棒を使用した流体管路の閉止構造は、先端に第一のシール部材８１と第二のシール部材８２を有する弁体８３を有する弁棒８０を備え、上記弁棒８０を駆動操作することにより圧接しうる流体管路の開口部８４の周縁部に下方側からばね材８５の付勢力により上方へ付勢され、短小管８６の先端に設けられ、上記第一のシール部材８１が圧接しうる第一の弁座８７と、上記流体管路の開口部８４の周縁部に設けられた上記第二のシール部材８２が圧接しうる第二の弁座８８とにより構成されている。
上記弁棒８０の駆動操作により流体管路の開口部８４を閉止する場合には、図６に示すような流体管路の開口部８４の開口状態から、上記弁棒８０の駆動操作により、上記短小管８６の先端に設けられた第一の弁座８７に上記弁棒８０の先端側のシール部材８１を圧接させることにより上方へ付勢された上記短小管８６を下方へ移動させる。
そして、図７に示すように、上記流体管路の開口部８４の周縁部に設けられた第二の弁座８８に上記弁棒８０の後端側のシール部材８２が圧接され、流体管路の開口部８４は２つのシール部材８１，８２により閉止される。
このように構成された流体管路の閉止構造においては、２つのシール部材８１，８２のうちの一方が、弁座８７，８８に対する不完全な閉止状態となった場合であっても、他方が閉止することで汚染を防ぎ、漏れた液体は、上記短小管８６の移動により形成された液体通路８９を通り、排出口９０を介して排出されるので、管路内を流通する液体の閉止状態にある他の管路への漏れを防止することができる。
Conventionally, from the viewpoint of improving the sealing performance between the valve stem and the valve seat, the valve stem is configured such that two seal members provided at the tip of the valve stem are in pressure contact with the valve seat, respectively. In the past, there has been proposed a fluid conduit closing structure that prevents leakage of various liquid products into a closed conduit even when the fluid is damaged (Patent Document 1).
As shown in FIG. 6, a conventional fluid pipe closing structure using a double seal valve stem has a valve stem 80 having a valve body 83 having a first seal member 81 and a second seal member 82 at the tip. And is urged upward from the lower side by the urging force of the spring material 85 to the peripheral portion of the opening 84 of the fluid conduit that can be pressure-contacted by driving the valve stem 80, and is provided at the tip of the short pipe 86. The first valve seat 87 that can be pressed against the first seal member 81 and the second seal member 82 provided on the peripheral edge of the opening 84 of the fluid conduit can be pressed against each other. The valve seat 88 is comprised.
When the fluid conduit opening 84 is closed by driving the valve stem 80, the valve stem 80 is driven from the open state of the fluid conduit opening 84 as shown in FIG. When the seal member 81 on the distal end side of the valve rod 80 is brought into pressure contact with the first valve seat 87 provided at the distal end of the short small tube 86, the short small tube 86 biased upward is moved downward.
Then, as shown in FIG. 7, a seal member 82 on the rear end side of the valve rod 80 is brought into pressure contact with a second valve seat 88 provided at the peripheral edge of the opening 84 of the fluid conduit, and the fluid conduit The opening 84 is closed by two seal members 81 and 82.
In the fluid pipe closing structure thus configured, even when one of the two seal members 81 and 82 is in an incompletely closed state with respect to the valve seats 87 and 88, the other is Contamination is prevented by closing, and the leaked liquid passes through the liquid passage 89 formed by the movement of the short tube 86 and is discharged through the discharge port 90, so that the liquid flowing through the pipe is closed. It is possible to prevent leakage to other pipe lines.
しかしながら、このような従来の流体管路の閉止構造では、ばね材８５の付勢力により上記短小管８６を付勢しているので、ばね材８５の経年時における劣化や破損等により上記第一の弁座８７に圧接されるシール部材８１のシール効果が損なわれ、その結果、開口部８４が完全には閉止されず、各種液体製品が漏れ、コンタミネーションが発生する可能性を有するという不具合が存していた。 However, in such a conventional fluid pipe closing structure, the short pipe 86 is urged by the urging force of the spring member 85. Therefore, the first material is deteriorated due to deterioration or breakage of the spring member 85 over time. The sealing effect of the sealing member 81 pressed against the valve seat 87 is impaired, and as a result, the opening 84 is not completely closed, and there is a possibility that various liquid products leak and contamination may occur. Was.
また、このようなシール部材８１，８２は、上記弁体８３上に形成された凹溝９１に嵌め込みうる環状に形成され、シール部材８１，８２の取り付け作業は、上記シール部材８１，８２を上記弁体８３に嵌め込むことにより行っていた。
しかしながら、このような場合には、嵌め込み作業時に、上記シール部材８１，８２を嵌め込むための治具を必要とするため煩雑であり、また、交換作業が煩雑となり、嵌め込み作業時に上記シール部材８１，８２に損傷を与える可能性を有する不具合が存していた。
Further, such seal members 81 and 82 are formed in an annular shape that can be fitted into a concave groove 91 formed on the valve body 83, and the sealing members 81 and 82 are attached to the seal members 81 and 82 described above. This was done by fitting into the valve body 83.
However, in such a case, a jig for fitting the sealing members 81 and 82 is required at the time of fitting work, and the replacement work becomes complicated, and the sealing member 81 is arranged at the time of fitting work. , 82 has the potential to damage it.
このような不具合を解決するために、シール部材の弁体への嵌め込み作業を不要とする弁棒構造が従来より提案されている（特許文献２）。
図８に示すように、従来の弁棒９２は、弁軸部９３と、上記弁軸部９３の基端部に設けられた基板部９４とを有する弁棒本体９５と、上記基板部９４に当接して配置されるシール部材９６と、上記シール部材９６に当接して配置されるステム９７とを有し、上記シール部材９６と上記ステム９７は単一の固定部材９８により上記基板部９４に対して着脱自在に固定されることにより構成されている。
In order to solve such problems, a valve stem structure that eliminates the need for fitting a seal member into a valve body has been proposed (Patent Document 2).
As shown in FIG. 8, the conventional valve stem 92 includes a valve stem body 93 having a valve stem portion 93 and a base plate portion 94 provided at the base end portion of the valve stem portion 93, and the base plate portion 94. A seal member 96 disposed in contact with the seal member 96 and a stem 97 disposed in contact with the seal member 96 are provided. The seal member 96 and the stem 97 are attached to the substrate portion 94 by a single fixing member 98. On the other hand, it is configured to be detachably fixed.
しかしながら、特許文献１には、従来の二重シール効果を有する流体管路の閉止構造が開示されているが、上記ばね材８５の劣化等により上記第一の弁座８７に圧接される第一のシール部材８１の閉止効果が損なわれる可能性を有するという不具合を解決した流体管路の閉止構造は開示されていない。
さらに、特許文献２には、二重シール効果を有する流体管路の閉止構造は開示されておらず、二重シール効果を有すると共に固定部材の締め付け操作のみで容易にシール部材の交換等ができる流体管路の閉止構造を開示した先行技術文献は見出すことができない。
Further, Patent Document 2 does not disclose a fluid conduit closing structure having a double seal effect, and has a double seal effect and can be easily replaced only by tightening a fixing member. Prior art documents disclosing the closed structure of the fluid conduit cannot be found.
そこで、本願発明の課題は、シール性が高く、シール部材の取り付け又は交換が容易であると共にシール部材の脱落を防止できる流体管路の閉止構造を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a fluid pipe line closing structure that has high sealing performance, can be easily attached or replaced, and can prevent the sealing member from falling off.
このような課題を解決するために、請求項１記載の発明は、流体管路内に配置され、流体排出口の周縁部に設けられた弁座と、上記弁座に圧接しうる弁棒とを備え、上記弁棒を駆動操作することにより上記弁座に弁棒を圧接又は離間させて、上記流体排出口を開閉可能に閉止する流体管路の閉止構造であって、上記弁座は、単一の流体排出口の周縁部において管路構成部材と一体に複数設けられていると共に上記弁棒には上記複数の弁座に夫々当接しうるシール部材が設けられ、上記複数の弁座は、上記流体排出口における流路方向に沿って設けられ、第一弁座及び第二弁座により構成され、上記第二弁座は、上記第一弁座よりも流路内方へ突出形成されていると共に、上記シール部材は、上記第一弁座に圧接しうる第一のシール部材と、上記第二弁座に圧接しうる第二のシール部材とにより構成され、上記第二のシール部材は、上記第一のシール部材よりも小径に形成され、上記弁棒は、弁軸部と、上記弁軸部の基端部に設けられた基板部とを有する弁棒本体と、上記基板部に当接して配置される上記第一のシール部材と、上記第一のシール部材に当接して配置される上記第一のステムと、上記第一のステムに当接して反弁軸部側に配置される上記第二のシール部材と、上記第二のシール部材に当接して反弁軸部側に配置される第二のステムとを有し、上記第一のシール部材、上記第一のステム、上記第二のシール部材及び上記第二のステムは、単一の固定部材により上記基板部に対して着脱可能に固定され、上記第一のステムは、上記第一のシール部材よりも小径であって、かつ上記第二のシール部材よりも大径に形成され、上記第二のステムは、上記第二のシール部材よりも小径に形成されていることを特徴とする。
従って、請求項１記載の発明にあっては、上記単一の固定部材により上記第一のシール部材及び上記第二のシール部材を上記弁棒に取り付けることができる。また、上記第一のステムは、上記第一のシール部材よりも小径であって、かつ上記第二のシール部材よりも大径に形成され、上記第二のステムは、上記第二のシール部材よりも小径に形成されているので、上記弁棒に取り付ける場合に、径の大きい順に取り付けることができる。
In order to solve such a problem, the invention described in claim 1 includes a valve seat disposed in the peripheral portion of the fluid discharge port and disposed in the fluid conduit, and a valve rod capable of being pressed against the valve seat. A fluid pipe closing structure that opens and closes the fluid discharge port by pressing or separating the valve stem from the valve seat by driving the valve stem. A plurality of integral pipe members are provided at the periphery of a single fluid discharge port, and the valve stem is provided with a seal member that can abut against the plurality of valve seats. The first valve seat and the second valve seat are provided along the flow path direction at the fluid discharge port, and the second valve seat is formed so as to protrude inward from the first valve seat. The seal member includes a first seal member that can be pressed against the first valve seat, A second seal member that can be in pressure contact with the second valve seat, the second seal member having a smaller diameter than the first seal member, and the valve stem includes a valve shaft portion, A valve stem body having a base plate portion provided at a base end portion of the valve shaft portion, the first seal member disposed in contact with the base plate portion, and in contact with the first seal member The first stem to be operated, the second seal member that is in contact with the first stem and disposed on the counter valve shaft side, and the counter valve shaft side that is in contact with the second seal member And the first seal member, the first stem, the second seal member, and the second stem are attached to the substrate portion by a single fixing member. The first stem is smaller in diameter than the first seal member, and is Than the second sealing member is formed to have a larger diameter, said second stem is characterized by being smaller in diameter than the second seal member.
Accordingly, in the first aspect of the invention, the first seal member and the second seal member can be attached to the valve stem by the single fixing member. The first stem is smaller in diameter than the first seal member and larger in diameter than the second seal member, and the second stem is formed in the second seal member. Since it is formed in a smaller diameter than the above, when it is attached to the valve stem, it can be attached in order of increasing diameter.
また、請求項２記載の発明は、上記弁軸部は、一軸で構成されていることを特徴とする。 The invention according to claim 2 is characterized in that the valve shaft portion is constituted by a single shaft.
請求項１記載の発明に係る流体管路の閉止構造にあっては、上記弁座は、単一の流体排出口の周縁部において管路構成部材と一体に複数設けられていると共に上記弁棒には上記複数の弁座に夫々当接しうるシール部材が設けられており、１つのシール部材がシール性を損なった場合であっても他のシール部材により流体管路を閉止できるので、シール性が高く、液体製品のコンタミネーションを有効に防止しうる流体管路の閉止構造を提供することができる。 In the fluid conduit closing structure according to the first aspect of the present invention, a plurality of the valve seats are provided integrally with the conduit constituent member at the periphery of the single fluid discharge port, and the valve stem is provided. Is provided with a seal member that can contact each of the plurality of valve seats, and even if one seal member impairs the sealing performance, the fluid conduit can be closed by the other sealing member. Therefore, it is possible to provide a fluid conduit closing structure that is high and can effectively prevent contamination of a liquid product.
また、上記流体排出口を開閉可能に閉止しうると共に、一方のシール部材がシール性を損なった場合であっても他方のシール部材により流体管路を閉止できるので、シール性が高い流体管路の閉止構造を提供することができる。In addition, the fluid discharge port can be closed so that it can be opened and closed, and even if one sealing member loses its sealing performance, the fluid piping can be closed by the other sealing member, so that the fluid piping has high sealing performance. It is possible to provide a closed structure.
また、上記単一の固定部材により上記第一のシール部材及び上記第二のシール部材を上記弁棒に取り付けることができるので、シール部材の取り付け又は交換が容易であると共にシール部材の脱落を防止できる流体管路の閉止構造を提供することができる。 In addition, since the first sealing member and the second sealing member can be attached to the valve stem by the single fixing member, it is easy to attach or replace the sealing member and prevent the sealing member from falling off. It is possible to provide a fluid conduit closing structure.
さらに、上記第一のステムは、上記第一のシール部材よりも小径であって、かつ上記第二のシール部材よりも大径に形成され、上記第二のステムは、上記第二のシール部材よりも小径に形成されているので、上記弁棒に取り付ける場合に、径の大きい順に取り付けることができるので、シール部材の取り付け又は交換が容易であると共にシール部材の脱落を防止できる流体管路の閉止構造を提供することができる。 Further, the first stem has a smaller diameter than the first seal member and a larger diameter than the second seal member, and the second stem is the second seal member. Since it can be attached to the valve stem in the order of increasing diameter, it is easy to attach or replace the seal member and prevent the fluid member from falling off. A closure structure can be provided.
請求項２記載の発明に係る流体管路の閉止構造にあっては、上記弁棒は、一軸で構成されており、上記弁棒をアクチュエータにより駆動操作する場合に、複数の弁棒で構成された閉止構造では弁棒を駆動するために複数のアクチュエータが必要であるが、一軸の弁棒を１つのアクチュエータにより駆動制御すればよいので、流体管路の閉止構造の構成を簡素化できる。 In the fluid conduit closing structure according to the second aspect of the present invention, the valve stem is constituted by a single shaft, and is constituted by a plurality of valve rods when the valve stem is driven by an actuator. In the closed structure, a plurality of actuators are required to drive the valve stem. However, since the uniaxial valve rod may be driven and controlled by a single actuator, the configuration of the fluid conduit closing structure can be simplified.
以下、本発明に係る流体管路の閉止構造の第一の実施の形態について説明する。
図１又は図２に示すように、本発明に係る第一の実施の形態に係る流体管路の閉止構造１０は、流体管路内に配置され、流体排出口１１の周縁部に設けられた弁座１２，１３と、上記弁座１２，１３に圧接しうる弁棒１４とを備え、上記弁棒１４を駆動操作することにより上記弁座１２，１３に弁棒１４を圧接又は離間させて、上記流体排出口１１を開閉可能に閉止する流体管路の閉止構造１０であって、上記弁座１２，１３は、単一の流体排出口１１の周縁部において管路構成部材と一体に複数設けられていると共に上記弁棒１４には上記複数の弁座１２，１３に夫々当接しうるシール部材１５，１６が設けられている。
Hereinafter, a first embodiment of a fluid pipe line closing structure according to the present invention will be described.
As shown in FIG. 1 or FIG. 2, the fluid conduit closing structure 10 according to the first embodiment of the present invention is disposed in the fluid conduit and provided at the peripheral portion of the fluid discharge port 11. The valve seats 12 and 13 and the valve rod 14 that can be pressed against the valve seats 12 and 13 are provided. By driving the valve rod 14, the valve rod 14 is pressed against or separated from the valve seats 12 and 13. A fluid conduit closing structure 10 for closing the fluid discharge port 11 so that the fluid discharge port 11 can be opened and closed, and a plurality of valve seats 12 and 13 are integrally formed with a pipe component at the peripheral portion of the single fluid discharge port 11. The valve rod 14 is provided with seal members 15 and 16 which can be in contact with the plurality of valve seats 12 and 13, respectively.
また、図１又は図２に示すように、上記複数の弁座１２，１３は、上記流体排出口１１における流路方向に沿って設けられ、第一弁座１２及び第二弁座１３により構成され、上記第二弁座１３は、上記第一弁座１２よりも流路内方へ突出形成されていると共に、上記シール部材１５，１６は、上記第一弁座１２に圧接しうる第一のシール部材１５と、上記第二弁座１３に圧接しうる第二のシール部材１６とにより構成され、上記第二のシール部材１６は、上記第一のシール部材１５よりも小径に形成されている。 As shown in FIG. 1 or FIG. 2, the plurality of valve seats 12, 13 are provided along the flow path direction in the fluid discharge port 11, and are configured by the first valve seat 12 and the second valve seat 13. The second valve seat 13 is formed so as to protrude inward of the flow path from the first valve seat 12, and the seal members 15 and 16 can be pressed against the first valve seat 12. And a second seal member 16 that can be pressed against the second valve seat 13, and the second seal member 16 is formed to have a smaller diameter than the first seal member 15. Yes.
また、図３及び図４に示すように、上記弁棒１４は、弁軸部１７と、上記弁軸部１７の基端部に設けられた基板部１８とを有する弁棒本体１９と、上記基板部１８に当接して配置される上記第一のシール部材１５と、上記第一のシール部材１５に当接して配置される上記第一のステム２０と、上記第一のステム２０に当接して反弁軸部１７側に配置される上記第二のシール部材１６と、上記第二のシール部材１６に当接して反弁軸部１７側に配置される第二のステム２１とを有し、上記第一のシール部材１５、上記第一のステム２０、上記第二のシール部材１６及び上記第二のステム２１は、単一の固定部材２２により上記基板部１８に対して着脱可能に固定されている。 3 and 4, the valve stem 14 includes a valve stem body 19 having a valve stem portion 17 and a base plate portion 18 provided at a proximal end portion of the valve stem portion 17; The first seal member 15 disposed in contact with the substrate portion 18, the first stem 20 disposed in contact with the first seal member 15, and the first stem 20 The second seal member 16 disposed on the counter valve shaft portion 17 side, and the second stem 21 disposed on the counter valve shaft portion 17 side in contact with the second seal member 16. The first seal member 15, the first stem 20, the second seal member 16, and the second stem 21 are detachably fixed to the substrate portion 18 by a single fixing member 22. Has been.
また、図３〜図５に示すように、上記第一のステム２０は、上記第一のシール部材１５よりも小径であって、かつ上記第二のシール部材１６よりも大径に形成され、上記第二のステム２１は、上記第二のシール部材１６よりも小径に形成されている。
また、図１〜図５に示すように、上記弁軸部１７は、一軸で構成されている。
As shown in FIGS. 3 to 5, the first stem 20 has a smaller diameter than the first seal member 15 and a larger diameter than the second seal member 16. The second stem 21 has a smaller diameter than the second seal member 16.
Moreover, as shown in FIGS. 1-5, the said valve stem part 17 is comprised by one axis | shaft.
以下に、図面を用いて本実施例について、詳細を説明する。
図１及び図２に示すように、本実施例においては、弁座が、第一弁座１２及び第二弁座１３の２つの弁座により構成され、上記シール部材が、上記第一弁座１２に圧接しうる第一のシール部材１５と、上記第二弁座１３に圧接しうる第二のシール部材１６の２つのシール部材により構成される場合を例に説明する。
Details of the present embodiment will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, in this embodiment, the valve seat is composed of two valve seats, a first valve seat 12 and a second valve seat 13, and the sealing member is the first valve seat. An example will be described in which the first seal member 15 that can be pressed into contact with 12 and the second seal member 16 that can be pressed into contact with the second valve seat 13 are used.
図１及び図２に示すように、例えば、本実施例に係る液体管路は、夫々が断面略円形状の第一の管路２３、上記第二の管路２４及び第三の管路２５とを有し、上記第一の管路２３と上記第一の管路２３に接続された第二の管路２４により構成された平面略Ｌ字状に構成された管路と、上記第一の管路２３と上記第二の管路２４との接続部分に上記第一の管路２３と上記第二の管路２４とに互いに垂直になるように下方に向って接続されている第三の管路２５とにより構成されている。 As shown in FIGS. 1 and 2, for example, the liquid conduit according to the present embodiment includes a first conduit 23 having a substantially circular cross section, the second conduit 24, and the third conduit 25. A first pipe 23 and a second pipe 24 connected to the first pipe 23, the pipe having a substantially L-shape, and the first pipe The third pipe 23 and the second pipe 24 are connected to the first pipe 23 and the second pipe 24 in a downward direction so as to be perpendicular to each other. It is comprised by this pipe line 25.
また、図２に示すように、上記第三の管路２５の流体排出口１１の周縁部には、第一弁座１２及び第二弁座１３の２つの弁座が管路構成部材と一体に設けられており、第二弁座１３が第一弁座１２よりも流路内方へ段違いに突出形成されており、図２に示すように、上記第一の弁座１２は流体排出口１１の上部に形成された第一の凸部２６上に形成され、上記第二の弁座１３は流体排出口１１の下部に形成された第二の凸部２７上に形成されている。
上記第一の凸部２６は、上端面２８が上記第一の管路２３に略平行に形成されると共に、側壁面３０が上記上端面２８に対して略垂直に形成され、上記上端面２８と上記側壁面３０が連設されることにより形成されている。
同様に、上記第二の凸部２７は、上端面２９が上記第一の管路２３に略平行に形成されると共に、側壁面３１が上記上端面２９に対して略垂直に形成され、上記上端面２９と上記側壁面３１が連設されることにより形成されている。
また、第二の凸部２７が第一の凸部２６よりも流路内方へ段違いに突出形成されている。
また、上記第一弁座１２及び第二弁座１３は、第一のシール部材１５が第一弁座、第二のシール部材１６が第二弁座１３に圧接される際に、弁棒１４と弁座１２，１３との間をシールしうるように、上記第一の凸部２６及び上記第二の凸部２７の角部分が流路内方に傾斜するような環状斜面により形成されている。
In addition, as shown in FIG. 2, two valve seats of the first valve seat 12 and the second valve seat 13 are integrated with the pipe constituent member at the peripheral portion of the fluid discharge port 11 of the third pipe 25. The second valve seat 13 protrudes inward of the flow path from the first valve seat 12, and the first valve seat 12 has a fluid discharge port as shown in FIG. 11, the second valve seat 13 is formed on a second convex portion 27 formed at the lower portion of the fluid discharge port 11.
The first convex portion 26 has an upper end surface 28 formed substantially parallel to the first conduit 23 and a side wall surface 30 formed substantially perpendicular to the upper end surface 28. And the side wall surface 30 is formed continuously.
Similarly, the second convex portion 27 has an upper end surface 29 formed substantially parallel to the first conduit 23 and a side wall surface 31 formed substantially perpendicular to the upper end surface 29. The upper end surface 29 and the side wall surface 31 are connected to each other.
Further, the second convex portion 27 is formed so as to protrude stepwise inward of the flow path from the first convex portion 26.
The first valve seat 12 and the second valve seat 13 are configured so that the first seal member 15 is pressed against the first valve seat and the second seal member 16 is pressed against the second valve seat 13. In order to seal between the valve seats 12 and 13, the corner portions of the first convex portion 26 and the second convex portion 27 are formed by an annular inclined surface inclined inward of the flow path. Yes.
また、図１に示すように、上記第一の凸部２７の上記側壁面３０及び上記第二の凸部２７の上端面２９は、上記弁座１２，１３がシール部材１５，１６に圧接される時に第一のステム２０は当接せず、上記側壁面３０及び上記上端部２９と第一のステム２０との間に空間部３２を有する。
また、上記空間部３２には、図１に示すように、シール部材１５，１６のシール性が損なわれた場合に漏れた液体を排出しうる排出ドレーン３３が連設され、排出ドレーン３３は、サイド弁棒（図示せず）により適宜開閉しうるように構成されている。
Further, as shown in FIG. 1, the valve seats 12 and 13 are pressed against the seal members 15 and 16 on the side wall surface 30 of the first convex portion 27 and the upper end surface 29 of the second convex portion 27. When the first stem 20 is not in contact, the side wall surface 30, the upper end portion 29 and the first stem 20 have a space portion 32.
Further, as shown in FIG. 1, a discharge drain 33 that can discharge the leaked liquid when the sealing performance of the seal members 15 and 16 is impaired is connected to the space portion 32. A side valve stem (not shown) can be appropriately opened and closed.
また、図３及び図５に示すように、弁棒本体１９は、円柱状の弁軸部１７と、上記弁軸部１７の基端部に設けられた円板状の基板部１８により構成され、上記基板部１８の反弁軸部１７側の外周縁に設けられた壁部３４を有し、上記基板部１８の中央部には、固定部材２２を固定しうるネジ溝７０を有する固定孔３５が形成されている。 As shown in FIGS. 3 and 5, the valve stem main body 19 includes a cylindrical valve shaft portion 17 and a disk-shaped substrate portion 18 provided at the base end portion of the valve shaft portion 17. A fixing hole having a wall portion 34 provided on the outer peripheral edge of the substrate portion 18 on the counter valve shaft portion 17 side, and having a screw groove 70 for fixing the fixing member 22 in the center portion of the substrate portion 18. 35 is formed.
また、図３及び図５に示すように、上記弁棒１４にはシール部材１５，１６が設けられ、第一のシール部材１５は、半径の略半分の径からなると共に上記第一のシール部材１５の厚さ方向略半分の厚さからなる環状孔１５ａを有する平面略環状に形成され、第二のシール部材１６よりも大径に形成され、弁棒本体１９の基板部１８の外径より小さな外径により形成され、図１に示すように、上記第一弁座１２に圧接しうるように構成されている。
また、第一のシール部材１５は、図３及び図５に示すように、厚さ方向一端部３７が上記基板部１８の下面部３６に当接しうるように平面状に形成されると共に上記第一のシール部材１５の厚さ方向一端部３７の外周縁が上記弁棒本体１９の基板部１８の壁部３４の内縁に当接しうるように形成されている。
また、図３に示すように、第一のシール部材１５の厚さ方向他端部３８は、山状に形成され、内方へ傾斜する傾斜壁部３９ａと外方へ傾斜する傾斜壁部３９ｂを有している。
図３に示すように、第一のシール部材１５の内周は、外周縁が上記傾斜壁部３９ａに連設されると共に内周縁が上記環状孔１５ａに連設された上記一端部３７と平行な平面部４０を上記第一のシール部材１５の厚さ方向略中間部に有する段差構造により形成されている。
As shown in FIGS. 3 and 5, the valve stem 14 is provided with seal members 15 and 16, and the first seal member 15 has a diameter approximately half of the radius and the first seal member. 15 is formed in a substantially annular shape having an annular hole 15a having a thickness that is approximately half of the thickness direction, is formed to have a larger diameter than the second seal member 16, and from the outer diameter of the substrate portion 18 of the valve stem body 19. It is formed with a small outer diameter, and as shown in FIG.
As shown in FIGS. 3 and 5, the first seal member 15 is formed in a planar shape so that the thickness direction one end portion 37 can come into contact with the lower surface portion 36 of the substrate portion 18 and the first seal member 15. The outer peripheral edge of one end portion 37 in the thickness direction of one seal member 15 is formed so as to be in contact with the inner edge of the wall portion 34 of the base plate portion 18 of the valve stem body 19.
Further, as shown in FIG. 3, the thickness direction other end portion 38 of the first seal member 15 is formed in a mountain shape, and an inclined wall portion 39a inclined inward and an inclined wall portion 39b inclined outward. have.
As shown in FIG. 3, the inner periphery of the first seal member 15 is parallel to the one end portion 37 whose outer peripheral edge is connected to the inclined wall portion 39a and whose inner peripheral edge is connected to the annular hole 15a. The flat surface portion 40 is formed by a step structure having a substantially intermediate portion in the thickness direction of the first seal member 15.
また、図５に示すように、第一のステム２０は、一方の短円筒部４３と上記一方の短円筒部４３に連設された上記一方の短円筒部４３より大きい径からなる他方の短円筒部４４により形成され、固定部材２２を挿通しうるような挿通孔５１が上記短円筒部４３，４４の中央に形成されている。
また、第一のステム２０の厚さ方向一端部４１は、図３に示すように、上記基板部１８の下面部３６に当接しうる形成され、上記厚さ方向一端部４１から上記第一のステム２０の厚さ方向略中央部に亘って形成された一方の短円筒部４３は、上記第一のシール部材１５の環状孔１５ａに当接しうるような外径を有し、上記第一のステム２０の厚さ方向略中央部から上記第一のステム２０の厚さ方向他端部４２に亘って形成された他方の短円筒部４４は、上記一方の短円筒部４４より大きな外径を有すると共に上記第一のシール部材１５の傾斜面部３９ａに当接しうる外周傾斜面部４５と上記第一のシール部材１５の平行面部４０と当接しうる中間平面部４６とを有している。
また、図３に示すように、上記第一のステム２０の厚さ方向他端部４２には、外周縁に外周壁部４８と底面部５０を有する凹部４７が形成され、上記底面部５０の外縁には、内周方向に段差形状に突出形成されている凸部４９が形成されている。
Further, as shown in FIG. 5, the first stem 20 has one short cylindrical portion 43 and the other short cylindrical portion 43 connected to the one short cylindrical portion 43 and having a diameter larger than that of the one short cylindrical portion 43. An insertion hole 51 that is formed by the cylindrical portion 44 and through which the fixing member 22 can be inserted is formed at the center of the short cylindrical portions 43 and 44.
Further, as shown in FIG. 3, one end portion 41 in the thickness direction of the first stem 20 is formed so as to be in contact with the lower surface portion 36 of the substrate portion 18. One short cylindrical portion 43 formed over a substantially central portion in the thickness direction of the stem 20 has an outer diameter that can contact the annular hole 15a of the first seal member 15, The other short cylindrical portion 44 formed from the substantially central portion of the stem 20 in the thickness direction to the other end portion 42 in the thickness direction of the first stem 20 has a larger outer diameter than the one short cylindrical portion 44. And an outer peripheral inclined surface portion 45 that can contact the inclined surface portion 39a of the first seal member 15 and an intermediate flat surface portion 46 that can contact the parallel surface portion 40 of the first seal member 15.
As shown in FIG. 3, a concave portion 47 having an outer peripheral wall portion 48 and a bottom surface portion 50 is formed on the outer peripheral edge of the other end portion 42 in the thickness direction of the first stem 20. A convex portion 49 is formed on the outer edge so as to protrude in a step shape in the inner circumferential direction.
また、図３及び図５に示すように、第二のシール部材１６は、半径の略半分の径からなると共に上記第二のシール部材１６の厚さ方向略半分の厚さからなる環状孔１６ａを有する平面略環状に形成され、第一のシール部材１５よりも小径に形成され、第一のステム２０の外径より小さな外径により形成され、図１に示すように、上記第二弁座１３に圧接しうるように構成されている。
また、第二のシール部材１６は、図３に示すように、厚さ方向一端部５２が上記第一のステム２０の底面部５０に当接しうるように平面状に形成されると共に上記厚さ方向一端部５２の外周縁には上記第一のステム２０の凸部４９に当接しうるような凹部５４が形成されている。
また、上記第二のシール部材１６の外周縁は、上記第一のステム２０の外周壁部４８の内縁に当接しうるように形成されている。
また、図３に示すように、上記第二のシール部材１６の厚さ方向他端部５３は、山状に形成され、内方へ傾斜する傾斜壁部５５ａと外方へ傾斜する傾斜壁部５５ｂを有している。
図３に示すように、第二のシール部材１６の内周は、外周縁が上記傾斜壁部５５ａに連設されると共に内周縁が上記環状孔１６ａに連設された上記一端部５２と平行な平面部５６を上記第二のシール部材１６の厚さ方向略中間部に有する段差構造により形成されている。
As shown in FIGS. 3 and 5, the second seal member 16 has an annular hole 16 a having a diameter that is approximately half the radius and a thickness that is approximately half the thickness of the second seal member 16. 1 is formed in a substantially annular shape with a smaller diameter than the first seal member 15 and with an outer diameter smaller than the outer diameter of the first stem 20, and as shown in FIG. 13 so as to be capable of being pressed against the pressure.
Further, as shown in FIG. 3, the second seal member 16 is formed in a planar shape so that one end 52 in the thickness direction can come into contact with the bottom surface portion 50 of the first stem 20 and has the above thickness. A concave portion 54 is formed on the outer peripheral edge of the one end portion 52 in the direction so as to come into contact with the convex portion 49 of the first stem 20.
The outer peripheral edge of the second seal member 16 is formed so as to be in contact with the inner edge of the outer peripheral wall portion 48 of the first stem 20.
As shown in FIG. 3, the other end 53 in the thickness direction of the second seal member 16 is formed in a mountain shape, and an inclined wall portion 55a inclined inward and an inclined wall portion inclined outward. 55b.
As shown in FIG. 3, the inner periphery of the second seal member 16 is parallel to the one end 52 in which the outer peripheral edge is connected to the inclined wall portion 55a and the inner peripheral edge is connected to the annular hole 16a. The flat surface portion 56 is formed by a step structure having a substantially intermediate portion in the thickness direction of the second seal member 16.
また、図５に示すように、第二のステム２１は、一方の円筒部５７と上記一方の円筒部５７に連設された上記一方の円筒部５７より大きい径からなる他方の円筒部５８により形成され、ボルト状の固定部材２２を挿通しうるような挿通孔５９が形成されている。
また、第二のステム２１の厚さ方向一端部６０は、図３に示すように、上記第一のステム２０の底面部５０に当接しうるように形成され、上記厚さ方向一端部６０から上記第二のステム２１の厚さ方向略中間部に亘って形成された一方の円筒部５７は、上記第二のシール部材１６の環状孔１６ａに当接しうるような外径を有し、上記第二のステム２１の厚さ方向略中間部から上記第二のステム２１の厚さ方向他端部６１に形成された他方の円筒部５８は、上記一方の円筒部５７より大きな外径を有すると共に上記第二のシール部材１６の傾斜面部５５ａに当接しうる外周傾斜面部６２と上記第二のシール部材１６の底面部５０と当接しうる中間平面部６３とを有している。
また、図３に示すように、上記第二のステム２１の厚さ方向他端部６１には、内方に傾斜する傾斜面部６５が外周縁に設けられていると共に内周縁に平面部６６を有する凹部６４部が形成されている。
As shown in FIG. 5, the second stem 21 is formed by one cylindrical portion 57 and the other cylindrical portion 58 having a larger diameter than the one cylindrical portion 57 connected to the one cylindrical portion 57. An insertion hole 59 is formed so that the bolt-shaped fixing member 22 can be inserted.
Further, as shown in FIG. 3, one end 60 in the thickness direction of the second stem 21 is formed so as to be in contact with the bottom surface portion 50 of the first stem 20, and from the one end 60 in the thickness direction. One cylindrical portion 57 formed over a substantially middle portion in the thickness direction of the second stem 21 has an outer diameter capable of coming into contact with the annular hole 16a of the second seal member 16, and The other cylindrical portion 58 formed from the substantially middle portion in the thickness direction of the second stem 21 to the other end portion 61 in the thickness direction of the second stem 21 has a larger outer diameter than the one cylindrical portion 57. In addition, an outer peripheral inclined surface portion 62 that can contact the inclined surface portion 55a of the second seal member 16 and an intermediate flat surface portion 63 that can contact the bottom surface portion 50 of the second seal member 16 are provided.
Further, as shown in FIG. 3, the other end portion 61 in the thickness direction of the second stem 21 is provided with an inclined surface portion 65 inclined inward at the outer peripheral edge and a flat portion 66 at the inner peripheral edge. The recessed part 64 which has is formed.
また、図３に示すように、固定部材２２は、軸部６７と上記軸部６７に連設された上記第二のステム２１の平面部６６に当接しうる係止部６９と上記係止部６９に連設された頭部６８とを有し、上記軸部６７には、上記弁棒本体１９の基板部１８に形成されたネジ溝７０を有する上記固定孔３５に固定しうるネジ溝７１が形成されている。
また、図５に示すように、上記頭部６８には、一般工具により上記固定部材２２を着脱しうるように径方向両端に切り欠き部７２，７２が形成されている。
また、図３に示すように、上記第二のステム２１の傾斜面部６５と、上記係止部６９の外周縁と、上記頭部６８の軸部６７側端面の外周縁に当接しうる環状のＯリング７３が設けられている。
As shown in FIG. 3, the fixing member 22 includes a shaft portion 67 and a locking portion 69 that can come into contact with the flat surface portion 66 of the second stem 21 that is connected to the shaft portion 67 and the locking portion. 69, and a screw groove 71 that can be fixed to the fixing hole 35 having a screw groove 70 formed in the base plate portion 18 of the valve stem body 19 in the shaft portion 67. Is formed.
Further, as shown in FIG. 5, the head portion 68 is formed with notches 72 and 72 at both ends in the radial direction so that the fixing member 22 can be attached and detached with a general tool.
Further, as shown in FIG. 3, the inclined surface portion 65 of the second stem 21, the outer peripheral edge of the locking portion 69, and the annular periphery that can come into contact with the outer peripheral edge of the end surface on the shaft portion 67 side of the head 68. An O-ring 73 is provided.
また、図１及び図２に示すように、流体管路の閉止構造１０は、弁棒１４の反基板部１８にアクチュエータ（図示せず）が取り付けられ、アクチュエータ（図示せず）により上記弁棒１４を駆動操作することにより、流体排出口１１を開閉可能に閉止する。 As shown in FIGS. 1 and 2, the fluid conduit closing structure 10 includes an actuator (not shown) attached to the non-substrate portion 18 of the valve stem 14, and the above-mentioned valve stem by the actuator (not shown). By operating 14, the fluid discharge port 11 is closed so as to be openable and closable.
上記弁棒１４を組み立てる場合には、図３及び図５に示すように、弁棒本体１９の基板部１８の下面部３６に第一のシール部材１５を当接させ配置する。
この場合、上記基板部１８は円板状に形成され、上記第一のシール部材１５は平面略環状に形成され、第一のシール部材１５の厚さ方向一端部３７が上記基板部１８の下面部３６に当接しうるように平面状に形成されると共に上記第一のシール部材１５の厚さ方向一端部３７の外周縁が上記弁棒本体１９の基板部１８の壁部３４の内縁に当接されるように形成されているので、位置合わせを不要とし、弁棒本体１９の基板部１８の下面部３６に第一のシール部材１５を容易に配置できる。
When assembling the valve stem 14, as shown in FIGS. 3 and 5, the first seal member 15 is disposed in contact with the lower surface portion 36 of the base plate portion 18 of the valve stem body 19.
In this case, the substrate portion 18 is formed in a disc shape, the first seal member 15 is formed in a substantially planar shape, and one end 37 in the thickness direction of the first seal member 15 is the lower surface of the substrate portion 18. The outer peripheral edge of the one end portion 37 in the thickness direction of the first seal member 15 is in contact with the inner edge of the wall portion 34 of the base plate portion 18 of the valve stem body 19. Since it is formed so as to be in contact with each other, positioning is not required, and the first seal member 15 can be easily disposed on the lower surface portion 36 of the substrate portion 18 of the valve stem body 19.
次に、図３に示すように、上記第一のシール部材１５に第一のステム２０を当接させ配置する。
この場合、上記第一のシール部材１５は平面略環状に形成され、第一のステム２０は円筒状に形成され、上記第一のステム２０の厚さ方向一端部４１が上記基板部１８の下面部３６に当接しうるように形成され、上記厚さ方向一端部４１から上記第一のステム２０の厚さ方向略中央部に亘って形成された一方の円筒部４３は、上記第一のシール部材１５の環状孔１５ａに当接しうるような外径を有し、上記第一のステム２０の厚さ方向略中央部から上記第一のステム２０の厚さ方向他端部４２に亘って形成された他方の短円筒部４４は、上記一方の短円筒部４４より大きな外径を有すると共に上記第一のシール部材１５の傾斜面部３９ａに当接しうる外周傾斜面部４５と上記第一のシール部材１５の平面部４０と当接しうる中間平面部４６とを有しているので、位置合わせを不要とし、上記第一のシール部材１５に第一のステム２０を容易に配置できる。
Next, as shown in FIG. 3, the first stem 20 is placed in contact with the first seal member 15.
In this case, the first sealing member 15 is formed in a substantially annular shape, the first stem 20 is formed in a cylindrical shape, and one end portion 41 in the thickness direction of the first stem 20 is the lower surface of the substrate portion 18. One cylindrical portion 43 formed so as to be in contact with the portion 36 and extending from the one end portion 41 in the thickness direction to the substantially central portion in the thickness direction of the first stem 20 is the first seal. The outer diameter of the member 15 is such that it can come into contact with the annular hole 15a, and is formed from the substantially central portion in the thickness direction of the first stem 20 to the other end portion 42 in the thickness direction of the first stem 20. The other short cylindrical portion 44 has a larger outer diameter than the one short cylindrical portion 44 and an outer peripheral inclined surface portion 45 that can contact the inclined surface portion 39a of the first seal member 15 and the first seal member. An intermediate flat surface portion 46 capable of coming into contact with the 15 flat surface portions 40; Since it has, the alignment is not necessary, can be easily arranged a first stem 20 to the first seal member 15.
次に、図３に示すように、上記第一のステム２０の反弁軸部１７側に第二のシール部材１６を当接させ配置する。
この場合、第一のステム２０は円筒状に形成され、上記第二のシール部材１６は平面環状に形成され、第二のシール部材１６の厚さ方向一端部５２が上記第一のステム２０の底面部５０に当接しうるように平面状に形成されると共に
上記厚さ方向一端部５２の外周縁には上記第一のステム２０の凸部４９に当接しうるような凹部５４が形成され、上記第二のシール部材１６の外周縁は、上記第一のステム２０の外周壁部４８の内縁に当接しうるように形成されているので、位置合わせを不要とし、上記第一のステム２０の反弁軸部１７側に第二のシール部材１６を容易に配置できる。
Next, as shown in FIG. 3, the second seal member 16 is disposed in contact with the counter valve shaft 17 side of the first stem 20.
In this case, the first stem 20 is formed in a cylindrical shape, the second seal member 16 is formed in a planar annular shape, and one end 52 in the thickness direction of the second seal member 16 is formed on the first stem 20. A concave portion 54 is formed on the outer peripheral edge of the thickness direction one end portion 52 so as to be in contact with the convex portion 49 of the first stem 20. Since the outer peripheral edge of the second seal member 16 is formed so as to be in contact with the inner edge of the outer peripheral wall portion 48 of the first stem 20, no alignment is required, and the first stem 20 The second seal member 16 can be easily disposed on the counter valve shaft portion 17 side.
次に、図３に示すように、上記第二のシール部材１６の反弁軸部１７側に第二のステム２１を当接させ配置する。
この場合、上記第二のシール部材１６は平面略環状に形成され、上記第二のステム２１は円筒状に形成され、第二のステム２１の厚さ方向一端部６０は、上記第一のステム２０の底面部５０に当接しうるように形成され、上記厚さ方向一端部６０から上記第二のステム２１の厚さ方向略中間部に亘って形成された一方の円筒部５７は、上記第二のシール部材１６の環状孔１６ａに当接しうるような外径を有し、上記第二のステム２１の厚さ方向略中間部から上記第二のステム２１の厚さ方向他端部６１に形成された他方の円筒部５８は、上記一方の円筒部５７より大きな外径を有すると共に上記第二のシール部材１６の傾斜面部５５ａに当接しうる外周傾斜面部６２と上記第二のシール部材１６の底面部５０と当接しうる中間平面部６３とを有しているので、位置合わせを不要とし、上記第二のシール部材１６の反弁軸部１７側に第二のステム２１を容易に配置できる。
Next, as shown in FIG. 3, the second stem 21 is disposed in contact with the counter valve shaft 17 side of the second seal member 16.
In this case, the second seal member 16 is formed in a substantially ring shape, the second stem 21 is formed in a cylindrical shape, and the one end 60 in the thickness direction of the second stem 21 is formed in the first stem. The one cylindrical portion 57 formed so as to be in contact with the bottom surface portion 50 of the 20 and extending from the one end portion 60 in the thickness direction to the substantially middle portion in the thickness direction of the second stem 21 is The outer diameter of the second seal member 16 is such that it can contact the annular hole 16a of the second seal member 16. From the substantially middle portion of the second stem 21 in the thickness direction to the other thickness direction other end portion 61 of the second stem 21 The other formed cylindrical portion 58 has an outer diameter larger than that of the one cylindrical portion 57 and can be in contact with the inclined surface portion 55 a of the second seal member 16 and the second seal member 16. An intermediate flat surface portion 63 that can come into contact with the bottom surface portion 50 of Since it has to, alignment is not required, it can easily be arranged a second stem 21 in Hanben shaft portion 17 side of the second seal member 16.
次に、図３及び図５に示すように、上記第二のステム２１の反軸部１７側にＯリング６５を当接させ配置する。
この場合、上記第二のステム２１は円筒状に形成され、上記Ｏリング６５は環状に形成され、上記Ｏリング６５は、上記第二のステム２１の傾斜面部６５に当接しうるように形成されているので、位置合わせを不要とし、上記第二のステム２１の反軸部１７側にＯリング６５を容易に配置できる。
Next, as shown in FIGS. 3 and 5, an O-ring 65 is disposed in contact with the second stem 21 on the side opposite to the shaft 17.
In this case, the second stem 21 is formed in a cylindrical shape, the O-ring 65 is formed in an annular shape, and the O-ring 65 is formed so as to be in contact with the inclined surface portion 65 of the second stem 21. Therefore, alignment is not required, and the O-ring 65 can be easily arranged on the side opposite to the shaft 17 of the second stem 21.
次に、図３及び図５に示すように、上記のように配置された上記第一のシール部材１５、上記第一のステム２０、上記第二のシール部材１６、上記第二のステム２１及び上記Ｏリング７３を固定部材２２により上記弁棒本体１９の基板部１８に固定する。
この場合、上記基板部１８には固定部材２２のネジ溝７１により固定しうるネジ溝７２を有する固定孔３５が形成され、上記第一のステム２０には固定部材２２の軸部６７を挿通しうる挿通孔５１が形成され、上記第二のステム２１には固定部材２２の軸部６７を挿通しうる挿通孔５９が形成され、上記固定部材２２の係止部６９の外周縁に当接しうる環状のＯリング７３が配置されているので、固定部材２２のネジ溝７１を上記弁棒本体１９の固定孔２２のネジ溝７０に嵌め込み固定することにより、図４に示すように、上記第一のシール部材１５、上記第一のステム２０、上記第二のシール部材１６、上記第二のステム２１及び上記Ｏリング７３を固定部材２２に挟み込み、容易に上記弁棒本体１９の基板部１８に固定することができる。
また、固定部材２２の頭部６８には、一般工具により上記固定部材２２を着脱しうるように径方向両端に切り欠き部７２，７２が形成されているので固定作業が容易である。
Next, as shown in FIGS. 3 and 5, the first seal member 15, the first stem 20, the second seal member 16, the second stem 21, and the second stem 21 arranged as described above, and The O-ring 73 is fixed to the base plate portion 18 of the valve stem body 19 by the fixing member 22.
In this case, a fixing hole 35 having a screw groove 72 that can be fixed by a screw groove 71 of the fixing member 22 is formed in the substrate portion 18, and the shaft portion 67 of the fixing member 22 is inserted into the first stem 20. An insertion hole 51 is formed, and an insertion hole 59 through which the shaft portion 67 of the fixing member 22 can be inserted is formed in the second stem 21, and can be brought into contact with the outer peripheral edge of the locking portion 69 of the fixing member 22. Since the annular O-ring 73 is disposed, the screw groove 71 of the fixing member 22 is fitted and fixed in the screw groove 70 of the fixing hole 22 of the valve stem body 19, as shown in FIG. The seal member 15, the first stem 20, the second seal member 16, the second stem 21, and the O-ring 73 are sandwiched between the fixing members 22, and can be easily attached to the base plate portion 18 of the valve stem body 19. Can be fixed
Moreover, since the notch parts 72 and 72 are formed in the both ends of radial direction so that the said fixing member 22 can be attached or detached with the general tool at the head 68 of the fixing member 22, fixing work is easy.
また、図４に示すように、上記第一のシール部材１５、上記第一のステム２０、上記第二のシール部材１６、上記第二のステム２１及び上記Ｏリング７３を固定部材２２に挟み込み固定された弁棒１４を分解する場合には、上記頭部６８に形成された切り欠き部７２，７２を一般工具を用いることにより、固定部材２２のネジ溝７１と上記弁棒本体１９の固定孔２２のネジ溝７０との嵌合状態を緩める方向に回転させることで、上記固定部材２２を容易に外すことができる。
従って、図５に示すように、上記固定部材２２を外すことにより上記第一のシール部材１５、上記第一のステム２０、上記第二のシール部材１６、上記第二のステム２１及び上記Ｏリング７３を夫々容易に分離することができ、シール部材１５，１６等の経年時における劣化や破損等が生じた場合であっても、固定部材２２を外すことにより夫々の部材を容易に分離でき、かつ、上記のように位置合わせを必要とせず夫々の部材を固定部材２２に挟み込むことより容易に弁棒１４を組み立てることが可能であるので、経年時における劣化や破損等が生じた部材の交換を適宜容易に行うことができる。
Further, as shown in FIG. 4, the first seal member 15, the first stem 20, the second seal member 16, the second stem 21, and the O-ring 73 are sandwiched and fixed to the fixing member 22. When disassembling the valve stem 14, the notch portions 72, 72 formed in the head 68 are used by using a general tool so that the screw groove 71 of the fixing member 22 and the fixing hole of the valve stem main body 19 are fixed. The fixing member 22 can be easily removed by rotating it in the direction of loosening the fitting state with the screw groove 70 of 22.
Therefore, as shown in FIG. 5, the first seal member 15, the first stem 20, the second seal member 16, the second stem 21, and the O-ring are removed by removing the fixing member 22. 73 can be easily separated from each other, and even when the seal members 15 and 16 are deteriorated or damaged over time, the respective members can be easily separated by removing the fixing member 22; In addition, as described above, the valve stem 14 can be easily assembled by sandwiching the respective members between the fixing members 22 without the need for alignment. Therefore, replacement of members that have deteriorated or damaged over time is possible. Can be easily performed as appropriate.
また、弁棒１４は、上記第一のシール部材１５、上記第一のステム２０、上記第二のシール部材１６、上記第二のステム２１及び上記Ｏリング７３を固定部材２２に挟み込み固定する構成であり、図６及び図７に示すような弁体８３上に形成された凹溝９１に嵌め込みしうる環状のシール部材８１，８２を上記弁体８４上に形成された凹溝９１に嵌め込む構成ではないので、シール部材１５，１６を嵌め込むための治具を必要とすることなく、弁棒１４の組み立て作業時にシール部材１５，１６へ損傷を与える可能性を低減でき、弁棒１４からシール部材１５，１６の脱落を防止することができる。 The valve stem 14 has a configuration in which the first seal member 15, the first stem 20, the second seal member 16, the second stem 21, and the O-ring 73 are sandwiched and fixed to the fixing member 22. 6 and 7, annular seal members 81, 82 that can be fitted into the concave groove 91 formed on the valve body 83 are fitted into the concave groove 91 formed on the valve body 84. Since it is not a structure, the possibility of damaging the seal members 15 and 16 during the assembly operation of the valve stem 14 can be reduced without requiring a jig for fitting the seal members 15 and 16. The seal members 15 and 16 can be prevented from falling off.
以下に、上記実施例の作用について説明する。
組み立てられた弁棒１４は、図１及び図２に示すように、流体管路内に配置され、上記弁棒１４の駆動操作により第一弁座１２に第一のシール部材１５を圧接又は離間させ、第二弁座１３に第二のシール部材１６を圧接又は離間させることにより流体排出口１１を開閉する。
このような構成からなる流体管路の閉止構造１０にあっては、図６及び図７に示すような従来の流体管路の閉止構造のようにばね材８５の付勢力により弁座８７が移動しうるような構成ではないことから、ばね材８５の経年時における劣化や破損等によるシール効果が損なわれるという問題はない。
The operation of the above embodiment will be described below.
As shown in FIGS. 1 and 2, the assembled valve stem 14 is disposed in the fluid conduit, and the first seal member 15 is pressed against or separated from the first valve seat 12 by the operation of driving the valve stem 14. The fluid discharge port 11 is opened and closed by pressing or separating the second seal member 16 from the second valve seat 13.
In the fluid pipe closing structure 10 having such a structure, the valve seat 87 is moved by the biasing force of the spring member 85 as in the conventional fluid pipe closing structure shown in FIGS. Since this is not a possible configuration, there is no problem that the sealing effect due to deterioration or breakage of the spring material 85 over time is impaired.
また、図１及び図２に示すように、弁棒１４の駆動操作により弁座１２，１３にシール部材１５，１６を圧接又は離間させることにより流体排出口１１を開閉する流体管路の閉止構造であるので、圧接又は離間を繰り返し行うことによるシール部材１５，１６の経年時における劣化や損傷等によりシール効果が損なわれる可能性を有する。
このような場合であっても、図３に示すように、第一のシール部材１５及び第二のシール部材１６は、シール部材１５，１６の一部の傾斜壁部３９ｂ，５５ｂをシール面として形成して他部を他の構成部材との圧着面とする厚みを有するように形成されているので、例えば断面径が小さい環状の表面全てがシール面として使用される簡易なシール部材と比して、圧接又は離間を繰り返し行うことによるシール部材１５，１６の経年時における劣化や損傷等によりシール効果が損なわれる可能性は軽減される。
As shown in FIGS. 1 and 2, a fluid conduit closing structure for opening and closing the fluid discharge port 11 by pressing or separating the seal members 15, 16 from the valve seats 12, 13 by driving the valve rod 14. Therefore, there is a possibility that the sealing effect may be impaired due to deterioration or damage of the seal members 15 and 16 over time due to repeated press contact or separation.
Even in such a case, as shown in FIG. 3, the first seal member 15 and the second seal member 16 have the inclined wall portions 39b and 55b of the seal members 15 and 16 as seal surfaces. Since it is formed so as to have a thickness where the other part is a pressure-bonding surface with other constituent members, for example, all annular surfaces with a small cross-sectional diameter are compared with a simple seal member used as a seal surface. Thus, the possibility that the sealing effect is impaired due to deterioration or damage of the sealing members 15 and 16 over time due to repeated press contact or separation is reduced.
また、図１に示すように、本発明にあっては、第一のシール部材１５及び第二のシール部材１６による二重のシール構造を有するので、例えば第一のシール部材１５が経年時における劣化や損傷等によりシール性を損なった場合であっても、第二弁座１３にシール性を有する第二のシール部材１６が当接することによるシール効果により、流体排出口１１を閉止することができる。
また、第二のシール部材１６が経年時における劣化や損傷等によりシール性を損なった場合であっても、第一弁座１２にシール性を有する第一のシール部材１５が当接することによるシール効果により、流体排出口１１を閉止することができる。
従って、二重のシール構造を有するシール性の高い流体管路の閉止構造１０を提供することができる。
Moreover, as shown in FIG. 1, in this invention, since it has the double seal structure by the 1st seal member 15 and the 2nd seal member 16, for example, the 1st seal member 15 is in aged. Even when the sealing performance is impaired due to deterioration or damage, the fluid discharge port 11 can be closed by the sealing effect caused by the contact of the second sealing member 16 having sealing performance with the second valve seat 13. it can.
In addition, even when the second seal member 16 is deteriorated in sealability due to deterioration or damage over time, the seal due to the contact of the first seal member 15 having sealability with the first valve seat 12 The fluid discharge port 11 can be closed due to the effect.
Therefore, it is possible to provide the fluid pipe closing structure 10 having a high sealing performance and having a double sealing structure.
また、一つのシール部材がシール性を損なった場合であっても、図１に示すように、側壁面３０及び上記第二の凸部２７の上端面２９と、第一のステム２０との間に空間部３２を有し、上記空間部３２には、シール部材１５，１６のシール性が損なわれた場合に漏れた液体を排出しうる排出ドレーン３３が連設されているので、排出ドレーン３３から漏れた液体を適宜排出することができる。 Further, even when one sealing member loses the sealing performance, as shown in FIG. 1, the gap between the side wall surface 30 and the upper end surface 29 of the second convex portion 27 and the first stem 20 is reduced. The space portion 32 is provided with a discharge drain 33 that can discharge the leaked liquid when the sealing performance of the seal members 15 and 16 is impaired. The liquid leaking from the liquid can be discharged as appropriate.
本発明は、流体管路の閉止構造に広く適用できる。 The present invention can be widely applied to a fluid pipe closing structure.
１０ 流体管路の閉止構造
１１ 流体排出口
１２ 第一弁座
１３ 第二弁座
１４ 弁棒
１５ 第一のシール部材
１５ａ 環状孔
１６ 第二のシール部材
１７ 弁軸部
１８ 基板部
１９ 弁棒本体
２０ 第一のステム
２１ 第二のステム
２２ 固定部材
２３ 第一の管路
２４ 第二の管路
２５ 第三の管路
２６ 第一の凸部
２７ 第二の凸部
２８ 上端面
２９ 上端面
３０ 側壁面
３１ 側壁面
３２ 空間部
３３ 排出ドレーン
３４ 壁部
３５ 固定孔
３６ 基板部の下面部
３７ 第一のシール部材の一端部
３８ 第二のシール部材の他端部
３９ａ 傾斜壁部
３９ｂ 傾斜壁部
４０ 平面部
４１ 第一のステムの一端部
４２ 第一のステムの他端部
４３ 第一のステムの一方の短円筒部
４４ 第一のステムの他方の短円筒部
４５ 外周傾斜面部
４６ 中間平面部
４７ 第一のステムの凹部
４８ 外周壁部
４９ 凸部
５０ 底面部
５１ 挿通孔
５２ 第二のシール部材の一端部
５３ 第二のシール部材の他端部
５４ 凹部
５５ａ 傾斜壁部
５５ｂ 傾斜壁部
５６ 平面部
５７ 一方の円筒部
５８ 他方の円筒部
５９ 挿通孔
６０ 第二のステムの一端部
６１ 第二のステムの他端部
６２ 外周傾斜面部
６３ 中間平面部
６４ 凹部
６５ 傾斜面部
６６ 平面部
６７ 軸部
６８ 頭部
６９ 係止部
７０ ネジ溝
７１ ネジ溝
７２ 切り欠き部
７３ Ｏリング
８０ 従来の弁棒
８１ 第一のシール部材
８２ 第二のシール部材
８３ 弁体
８４ 開口部
８５ ばね部材
８６ 短小管
８７ 第一の弁座
８８ 第二の弁座
８９ 液体通路
９０ 排出口
９１ 凹溝
９２ 従来の弁棒
９３ 弁棒軸部
９４ 基板部
９５ 弁棒本体
９６ シール部材
９７ ステム
10 Fluid pipe closing structure
11 Fluid outlet 12 First valve seat 13 Second valve seat 14 Valve rod 15 First seal member 15a Annular hole 16 Second seal member 17 Valve shaft
18 Board part
19 Valve stem body 20 First stem 21 Second stem 22 Fixing member 23 First conduit 24 Second conduit
25 Third pipeline
26 First convex portion 27 Second convex portion 28 Upper end surface 29 Upper end surface 30 Side wall surface 31 Side wall surface 32 Space portion 33 Discharge drain 34 Wall portion 35 Fixing hole 36 Lower surface portion 37 of substrate portion One end of first seal member Part 38 Second end 39a of second seal member Inclined wall part 39b Inclined wall part 40 Plane part 41 First stem one end part 42 First stem other end part 43 One short cylindrical part of the first stem 44 The other short cylindrical portion 45 of the first stem 45 The outer peripheral inclined surface portion 46 The intermediate flat surface portion 47 The first stem concave portion 48 The outer peripheral wall portion 49 The convex portion 50 The bottom surface portion 51 The insertion hole 52 The one end portion 53 of the second seal member The other end portion 54 of the second seal member Recessed portion 55a Inclined wall portion 55b Inclined wall portion 56 Plane portion 57 One cylindrical portion 58 The other cylindrical portion 59 Insertion hole 60 One end portion 61 of the second stem 61 The other end of the second stem Part 62 outer peripheral inclined surface part 63 Intermediate flat portion 64 Recessed portion 65 Inclined surface portion 66 Flat portion 67 Shaft portion 68 Head portion 69 Locking portion 70 Screw groove 71 Screw groove 72 Notch portion 73 O-ring 80 Conventional valve rod 81 First seal member 82 Second seal Member 83 Valve body 84 Opening portion 85 Spring member 86 Short pipe 87 First valve seat 88 Second valve seat 89 Liquid passage 90 Discharge port 91 Concave groove 92 Conventional valve rod 93 Valve rod shaft portion 94 Substrate portion 95 Valve rod Body 96 Seal member 97 Stem
Claims (2)
上記弁座は、単一の流体排出口の周縁部において管路構成部材と一体に複数設けられていると共に上記弁棒には上記複数の弁座に夫々当接しうるシール部材が設けられ、 A plurality of the valve seats are provided integrally with the pipe line constituting member at the peripheral portion of the single fluid discharge port, and the valve rod is provided with a seal member that can contact the valve seats,
上記複数の弁座は、上記流体排出口における流路方向に沿って設けられ、第一弁座及び第二弁座により構成され、上記第二弁座は、上記第一弁座よりも流路内方へ突出形成されていると共に、上記シール部材は、上記第一弁座に圧接しうる第一のシール部材と、上記第二弁座に圧接しうる第二のシール部材とにより構成され、上記第二のシール部材は、上記第一のシール部材よりも小径に形成され、 The plurality of valve seats are provided along a flow path direction at the fluid discharge port, and are configured by a first valve seat and a second valve seat, and the second valve seat has a flow path more than the first valve seat. The seal member is formed to project inward, and the seal member includes a first seal member that can be pressed against the first valve seat, and a second seal member that can be pressed against the second valve seat. The second seal member is formed with a smaller diameter than the first seal member,
上記弁棒は、弁軸部と、上記弁軸部の基端部に設けられた基板部とを有する弁棒本体と、上記基板部に当接して配置される上記第一のシール部材と、上記第一のシール部材に当接して配置される上記第一のステムと、上記第一のステムに当接して反弁軸部側に配置される上記第二のシール部材と、上記第二のシール部材に当接して反弁軸部側に配置される第二のステムとを有し、上記第一のシール部材、上記第一のステム、上記第二のシール部材及び上記第二のステムは、単一の固定部材により上記基板部に対して着脱可能に固定され、The valve stem includes a valve stem body having a valve stem portion and a base plate portion provided at a base end portion of the valve stem portion, the first seal member disposed in contact with the base plate portion, The first stem disposed in contact with the first seal member, the second seal member disposed in contact with the first stem on the side opposite to the valve stem, and the second seal A second stem disposed on the side opposite to the valve shaft portion in contact with the seal member, and the first seal member, the first stem, the second seal member, and the second stem are , It is detachably fixed to the substrate part by a single fixing member,
上記第一のステムは、上記第一のシール部材よりも小径であって、かつ上記第二のシール部材よりも大径に形成され、上記第二のステムは、上記第二のシール部材よりも小径に形成されていることを特徴とする流体管路の閉止構造。 The first stem is smaller in diameter than the first seal member and larger in diameter than the second seal member, and the second stem is larger than the second seal member. A fluid pipe closing structure characterized by having a small diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007267103A JP5122234B2 (en) | 2007-10-12 | 2007-10-12 | Fluid pipe closing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007267103A JP5122234B2 (en) | 2007-10-12 | 2007-10-12 | Fluid pipe closing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2009097538A JP2009097538A (en) | 2009-05-07 |
| JP5122234B2 true JP5122234B2 (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007267103A Active JP5122234B2 (en) | 2007-10-12 | 2007-10-12 | Fluid pipe closing structure |
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| JP (1) | JP5122234B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107218405A (en) * | 2017-06-02 | 2017-09-29 | 北京航天石化技术装备工程有限公司 | A kind of surge reliever sealing structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5594064A (en) * | 1978-12-29 | 1980-07-17 | Iwai Kikai Kogyo Kk | Double seal valve mechanism |
| JPH08109972A (en) * | 1994-10-11 | 1996-04-30 | Mitsubishi Heavy Ind Ltd | Shock absorber for valve |
| JP3846287B2 (en) * | 2001-11-27 | 2006-11-15 | 三浦工業株式会社 | valve |
| JP4126035B2 (en) * | 2004-07-30 | 2008-07-30 | 岩井機械工業株式会社 | Valve body structure |
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| Publication number | Publication date |
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| JP2009097538A (en) | 2009-05-07 |
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