JP2014190473A - Packing integral type check valve and return water prevention method - Google Patents

Packing integral type check valve and return water prevention method Download PDF

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JP2014190473A
JP2014190473A JP2013067807A JP2013067807A JP2014190473A JP 2014190473 A JP2014190473 A JP 2014190473A JP 2013067807 A JP2013067807 A JP 2013067807A JP 2013067807 A JP2013067807 A JP 2013067807A JP 2014190473 A JP2014190473 A JP 2014190473A
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check valve
packing
press
fitting
seat
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JP6139935B2 (en
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Hiroyuki Kanai
宏之 金井
Akira Kaneko
晃 金子
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Maezawa Kyuso Industries Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a packing integral type check valve for preventing a check valve main body from being dropped off due to no ability to support a secondary inner pressure by the check valve main body and preventing secondary return water from being flowed out even if a primary side tap water meter is removed.SOLUTION: A base part of support trunk of a check valve main body 1 is formed with a press fit expansible-contractible structure part 7 for an inner cavity at a union socket cutoff end face, the press fit expansible-contractible structure part is press fitted to the inner cavity of the union socket due to press fitting of the base part of the support trunk when the check valve main body 1 is stored and fitted in the cutoff end face of a union socket 5, and a stored and fitted state of the check valve main body is kept by the press fitting force of the base part of the support trunk even if a primary side tap water meter 4 is removed.

Description

本発明は、水道メーター端部と２次側のジョイント管となるユニオンソケットのジョイント等、袋ナットによって連結されるジョイント管のジョイント部に用いるパッキン一体型逆止弁とこれを用いた戻り水防止方法に関するものである。   The present invention relates to a packing integrated check valve used for a joint part of a joint pipe connected by a cap nut, such as a joint of a union socket which becomes a joint pipe on the secondary side of a water meter, and return water prevention using the same. It is about the method.

従来、このような袋ナットによって連結されるジョイント部のシールについては、２次側から逆流を同時に防止する逆止弁の設定が必要なため、逆止弁の弁シート部フランジ外周縁に、内周面に凹嵌溝が形成されたリング状パッキンを嵌着したパッキン一体型逆止弁が用いられてきている。   Conventionally, for the seal of the joint portion connected by such a cap nut, since it is necessary to set a check valve that prevents backflow from the secondary side at the same time, 2. Description of the Related Art A packing integrated check valve in which a ring-shaped packing having a recessed fitting groove formed on a peripheral surface is fitted has been used.

このようなパッキン一体型逆止弁は、例えば、特許文献１に記載されるように管継手部内に収嵌し、フランジ部の外周縁部に嵌着されたパッキンを、上流側（１次側）のジョイント管（例えば、水道メーターの２次側端部）の止水端面と下流側（２次側）の止水端面との間で圧接係合することにより止水する構造となっている。 Such a packing-integrated check valve is, for example, fitted in a pipe joint portion as described in Patent Document 1, and the packing fitted on the outer peripheral edge portion of the flange portion is connected to the upstream side (primary side). ) Of the joint pipe (for example, the secondary side end of the water meter) and the downstream side (secondary side) of the water stop end surface, the water stop is achieved by press contact engagement. .

しかし、上記のようなパッキン一体型逆止弁は、フランジ部を介して相対向する止水端面が平面である継手部内に収嵌し、フランジ部の外周縁部に嵌着されたパッキンを圧縮して止水する構造のため、鍔付ジョイント管の鍔部にパッキンのずれを防止する前方突出縁が形成されているものを使用したり、止水端面に段差が生じる多重管の入れ子形状でなる多重管用管継手に使用する場合に、袋ナットを締め付けると、鍔がフランジ部に干渉して破損する問題があった。   However, the packing-integrated check valve as described above is fitted in a joint portion having a flat water-stop end face opposite to the flange portion, and compresses the packing fitted to the outer peripheral edge portion of the flange portion. Because of the structure to stop the water, use a flanged joint pipe with a flange that has a front protruding edge that prevents the packing from shifting, or a multi-tube nested structure that creates a step on the water stop end face. When using the multi-pipe pipe joint, there is a problem that when the cap nut is tightened, the hook interferes with the flange portion and is damaged.

このような問題に対して、出願人は特許文献２記載のように、パッキンに鍔との干渉を防ぐ逃げ部を形成すると共に、フランジ部又はパッキンの凹部にパッキンの過変形を規制する規制部を設けることを提案している。   For such a problem, the applicant forms a relief portion that prevents interference with the flange in the packing as described in Patent Document 2, and restricts over-deformation of the packing in the flange portion or the recess of the packing. It is proposed to provide.

実開平６−０１２８７９号公報Japanese Utility Model Publication No. 6-012879 特開平２００９−１１５１４７号公報JP 2009-115147 A

しかしながら、上記した従来のパッキン一体型逆止弁は、何れもリング状パッキンが外周縁に嵌着された逆止弁のフランジ部を、継手される各ジョイント管の止水端面と鍔の間に挟持して２次側のジョイント管となるユニオンソケットの止水端面内に逆止弁本体が収嵌されているだけであるので、１次側のジョイント管となる例えば水道メーター端部が外されると、逆止弁本体は２次側からの内圧を支持することができず、２次側のジョイント管であるユニオンソケットの止水端面内から抜け落ち、２次側からの戻り水が継手部の周囲に流出してしまう問題がある。 However, each of the above-described conventional packing-integrated check valves has a flange portion of the check valve in which a ring-shaped packing is fitted to the outer peripheral edge between the water stop end surface of each joint pipe to be joined and the flange. Since the non-return valve body is only fitted in the water stop end surface of the union socket that is sandwiched and becomes the secondary joint pipe, for example, the end of the water meter that becomes the primary joint pipe is removed. Then, the check valve body cannot support the internal pressure from the secondary side and falls off from the water stop end surface of the union socket, which is the secondary side joint pipe, and the return water from the secondary side becomes the joint part. There is a problem of leaking around.

継手部の周囲には、外された水道メーターの本体や関係部品が置かれるので、水道メーター等の１次側ジョイント管が外されると同時に流出する戻り水によって水浸しとなったり、関係部品が水に濡れたり、１次側が水道メーターの場合にはメーターボックス内に泥水が溢れたりして後の作業に支障が生ずることになる。 Since the removed water meter main body and related parts are placed around the joint, the primary water pipe and other parts are removed, and at the same time, the return water that has flowed out is immersed in water. If the primary side is a water meter, muddy water overflows in the meter box, causing problems in later operations.

これを避けるためには、１次側のジョイント管を外す際に逆止弁本体を押さえて抜け落ちないようにしながら、重量のある水道メーター等の１次側ジョイント管取り外し作業を行う等しなければならない。なお、２次側のジョイント管となるユニオンソケットは市販品として量産されているものが用いられるため、逆止弁本体を収嵌する止水端面の内径に係止機構を形成することはできず、許容誤差も大きいという事情もある。 To avoid this, do not remove the primary joint pipe, such as a heavy water meter, while holding the check valve body so that it does not fall off when removing the primary joint pipe. Don't be. In addition, since the union socket used as the joint pipe on the secondary side is mass-produced as a commercial product, a locking mechanism cannot be formed on the inner diameter of the water stop end surface that fits the check valve body. There is also a situation that tolerance is large.

また、逆止弁本体をジョイント管の止水端面に固定的に収嵌してしまうと、メーター交換時に簡単に交換することができなくなり、消耗品として交換メンテナンスが必要なパッキンとしての機能が損なわれることになる。 Also, if the check valve body is fixedly fitted to the water stop end surface of the joint pipe, it cannot be easily replaced when replacing the meter, and the function as a packing that requires replacement maintenance as a consumable part is impaired. Will be.

本発明は上記した課題に対応しようとするものであり、パッキン一体型逆止弁のシート座面外殻の支持幹基部にユニオンソケット止水端面内腔への圧入膨縮構造部を形成することによって、２次側のジョイント管となるユニオンソケットの止水端面内に逆止弁本体が収嵌される際に、支持幹基部の圧入が行われるので、圧入膨縮構造部が止水端面内腔に圧着され、１次側のフランジ部挟持部材が除かれても、支持幹基部の圧着力により逆止弁本体はユニオンソケットの止水端面内への収嵌状態が維持されるように構成した。   SUMMARY OF THE INVENTION The present invention is intended to address the above-mentioned problems, and is to form a press-fitting expansion / contraction structure portion into a union socket water stop end surface lumen in a support trunk base portion of a seat seat surface outer shell of a packing integrated check valve. Therefore, when the check valve main body is fitted in the water stop end surface of the union socket that becomes the joint pipe on the secondary side, the support trunk base is press-fitted. Even if the primary side flange portion clamping member is removed, the check valve body is configured so that the non-return valve body is kept in the water stop end surface of the union socket by the pressure force of the support base. did.

また、支持幹基部に形成する圧入膨縮構造部は、パッキン一体型逆止弁のシート座面外殻の支持幹基部の外径部に、ユニオンソケット内径に圧係着する外径構造を備えた部材を着合させて形成するようにして、形成工作の簡略化、或いは、継手目的やユニオンソケット内径の構造に対応できる着合部材を選択的に適用できるようにした。   In addition, the press-fitting expansion / contraction structure portion formed on the support stem base has an outer diameter structure that press-fits to the inner diameter of the union socket on the outer diameter portion of the support stem base portion of the seat seating surface outer shell of the packing integrated check valve. By forming the members by joining them, it is possible to simplify the forming work, or to selectively apply the joining members that can cope with the joint purpose and the structure of the inner diameter of the union socket.

更に、ユニオンソケット内径に圧係着する外径構造を雄ねじ状のスパイラル突条によって構成し、ユニオンソケット内径への圧係着を、ねじり回動による進退力に関係付けることにより、ユニオンソケット内径への圧入時の押圧力、離脱時の引張力に推進性を加えて無理なく確実な着脱が行えるように構成した。 Furthermore, the outer diameter structure that press-fits to the inner diameter of the union socket is composed of a male thread-like spiral ridge, and the press-fitting to the inner diameter of the union socket is related to the advancing and retracting force due to torsional rotation, so It is constructed so that it can be attached and detached without difficulty by adding propulsiveness to the pressing force at the time and the pulling force at the time of separation.

また、着合部材の外径構造を、形成した圧入膨縮構造部の先端側をやや小径にして平行突周条による小幅な膨縮構造部を形成した２段構造とし、市販品ユニオンソケットの内径に許容誤差があることに対応すると共に、圧入縮径力し係合力を高めるようにした。なお、着合部材の素材は、ポリアセタールなどの樹脂、或いは、ステンレス、或いは、真鍮などの銅合金を設定環境や目的に応じて用いるものである。   In addition, the outer diameter structure of the joining member has a two-stage structure in which the tip side of the formed press-fitting expansion / contraction structure portion is slightly smaller in diameter and a narrow expansion / contraction structure portion is formed by parallel projecting circumferential strips. This corresponds to the fact that there is an allowable error in the inner diameter, and the engagement force is increased by press-fitting and reducing the diameter. The material of the joining member is a resin such as polyacetal, or a copper alloy such as stainless steel or brass depending on the setting environment or purpose.

本発明は、上記のように１次側のフランジ部挟持部材が除かれても、支持幹基部の圧着力により逆止弁本体はユニオンソケットの止水端面内への収嵌状態が維持されるように構成したので、１次側に位置する水道メーターの交換やメンテナンスの際に２次側からの戻り水を気にすることなく取り外し作業を行うことができ、次の作業に移る際に、逆止弁を外して戻り水を処理することができるので、水道メーター等の１次側機器の取り外し作業に要した無駄な労力や費用を大幅に削減することができた。   In the present invention, even if the primary side flange portion clamping member is removed as described above, the check valve main body is maintained in a state of fitting into the water stop end surface of the union socket by the pressure of the support trunk base portion. Since it was configured as such, it can be removed without worrying about the return water from the secondary side when replacing or maintaining the water meter located on the primary side, and when moving to the next work, Since the return water can be treated by removing the check valve, the wasteful labor and cost required for the removal work of the primary side equipment such as a water meter can be greatly reduced.

また、支持幹基部に、雄ねじ状のスパイラル突条による外径構造等の圧入膨縮構造部を形成して、ユニオンソケット内径への逆止弁の収脱を簡便に行えるようにしたので、一体型としての水密パッキン作用を充分に発揮したうえで、交換も簡単にでき、継手部のメンテナンス作業の効率化を図ることができた。 In addition, a press-fitting expansion / contraction structure part such as an outer diameter structure with a male thread-like spiral ridge is formed on the support trunk base part so that the check valve can be easily collected and unloaded to the inner diameter of the union socket. In addition to fully exhibiting the water-tight packing action as a body shape, it was possible to easily replace it and to improve the efficiency of maintenance work on the joint.

本発明の実施例を示すもので、本発明によるパッキン一体型逆止弁とそれを収嵌した袋ナットによるジョイント管継手部の全体構造を示す軸縦断側面図1 shows an embodiment of the present invention, and is a shaft longitudinal sectional side view showing the entire structure of a joint fitting joint portion by a packing integrated check valve according to the present invention and a cap nut fitted therein. 同じく、１次側機器を水道メーターとし、２次側のユニオンソケットに本発明によるパッキン一体型逆止弁を収嵌して袋ナットによる継手を行った全体構造を示す継手要部を切欠断面とした全体側面図Similarly, the primary device is a water meter, and the joint main part showing the overall structure in which the packing integrated check valve according to the present invention is fitted in the union socket on the secondary side and the joint with the cap nut is performed is a cutaway section. Overall side view 同じく、１次側機器を水道メーターとし、水道メーターを取除いた後のメーターボックス内の、１次側と２次側の配管状態と全体構造を示す、メーターボックスを切欠断面とした全体側面図Similarly, an overall side view of the meter box with a cutaway cross section showing the primary and secondary piping conditions and overall structure in the meter box after the water meter is removed from the primary device. 同じく、圧入膨縮構造部を着合部材によって形成するようにした実施例の、逆止弁本体と着合部材の分解軸縦断側面図Similarly, an exploded shaft vertical side view of the check valve main body and the mating member of the embodiment in which the press-fitting expansion / contraction structure portion is formed by the mating member 同じく、図４の実施例における着合部材を着合した後のパッキン一体型逆止弁の軸縦断側面図Similarly, the shaft longitudinal side view of the packing integrated check valve after the fitting member in the embodiment of FIG. 4 is joined. 同じく、本発明による着合部材の実施例で、圧入膨縮構造部を雄ねじ状のスパイラル突条に形成した着合部材外径部の側面図Similarly, in the embodiment of the mating member according to the present invention, a side view of the outer diameter portion of the mating member in which the press-fitting expansion / contraction structure portion is formed on a male thread-like spiral ridge. 同じく、本発明による着合部材の他の実施例で、環状本体に切り割り部を設定して逆止弁本体への嵌着構造とし、圧入膨縮構造部をユニオンソケットの内径誤差に対応する２段外径とした着合部材を示すもので、（ａ）は着合部材の底面図、（ｂ）は（ａ）のＡ−Ａ断面図、（ｃ）は同着合部材を逆止弁本体に着合してユニオンソケットの内径に収嵌した状況を示す全体の軸縦断側面図Similarly, in another embodiment of the fitting member according to the present invention, a slit portion is set in the annular main body so as to be fitted to the check valve main body, and the press-fitting expansion / contraction structure portion corresponds to the inner diameter error of the union socket. The joining member made into the step outside diameter is shown, (a) is a bottom view of a joining member, (b) is AA sectional drawing of (a), (c) is a check valve for the joining member. Whole shaft longitudinal side view showing the situation of fitting into the main body and fitting into the inner diameter of the union socket 同じく、本発明による着合部材の他の実施例で、逆止弁本体シート座面外殻の支持幹基部に雄ねじを刻設し、着合部材の内径に雌ねじを刻設して逆止弁本体の支持幹基部の雄ねじと螺合するようにした着合部材を示すもので、（ａ）は着合部材の底面図、（ｂ）は（ａ）のＡ−Ａ断面図、（ｃ）は同着合部材を逆止弁本体に着合してユニオンソケットの内径に収嵌した状況を示す全体の軸縦断側面図Similarly, in another embodiment of the mating member according to the present invention, a check valve is formed by engraving a male screw on the support base of the check seat body outer shell and engraving a female screw on the inner diameter of the mating member. 1 shows a joining member screwed with a male screw of a support trunk base of a main body, (a) is a bottom view of the joining member, (b) is a cross-sectional view taken along line AA of (a), and (c). Is a side view of the entire longitudinal axis of the shaft, showing the situation where the fitting member is fitted to the check valve body and fitted into the inner diameter of the union socket. 従来例によるパッキン一体型逆止弁とそれを収嵌した袋ナットによるジョイント管継手部の全体構造を示す軸縦断側面図Shaft longitudinal side view showing the entire structure of a joint fitting joint with a packing integrated check valve according to the conventional example and a cap nut fitted therein

以下、１次側ジョイント管を水道メーター、２次側ジョイント管をユニオンソケットとし、図面を参照して本発明の実施の形態について詳細に説明すると、１はパッキン一体型逆止弁の逆止弁本体で、フランジ部１１の外周縁に内周面に凹嵌溝２１が形成されたリング状パッキン２が嵌着され、継手される水道メーター４の２次側止水端面４ａとユニオンソケット５の１次側止水端面となる鍔５ａの間に挟着支持されて継手部をパッキンシールするものである。   Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings, in which the primary joint pipe is a water meter, the secondary joint pipe is a union socket, and 1 is a check valve of the packing integrated check valve. In the main body, the ring-shaped packing 2 having a concave fitting groove 21 formed on the inner peripheral surface is fitted to the outer peripheral edge of the flange portion 11, and the secondary water stop end surface 4 a of the water meter 4 to be joined and the union socket 5. It is sandwiched and supported between the eaves 5a serving as the primary water stop end surface, and seals the joint portion.

３は袋ナットで、ユニオンソケット５の段差部５１に掛止する掛止部３１と、１次側水道メーター４の止水端面４ａの外径に刻設された雄ねじ４１と螺合する雌ねじ３２とを有し、掛止部３１をユニオンソケット５の段差部５１に掛止した状態で、雌ねじ３２を水道メーター止水端面４ａの雄ねじ４１と螺合させることにより、１次側の止水端面と２次側止の止水端面とを互いに近接させ、或いは離間させる方向に進退させるようになっている。   Reference numeral 3 denotes a cap nut, a latching portion 31 that latches on the stepped portion 51 of the union socket 5, and a female screw 32 that engages with a male screw 41 engraved on the outer diameter of the water-stop end surface 4 a of the primary water meter 4. In the state where the latching portion 31 is latched on the stepped portion 51 of the union socket 5, the female screw 32 is screwed with the male screw 41 of the water meter water-stopping end surface 4a, thereby the primary water-stopping end surface. And the water stop end surface of the secondary side stop are moved close to each other or moved away from each other.

パッキン一体型逆止弁は、２次側ユニオンソケット５の止水端面５ａ側に収嵌され、逆止弁本体フランジ部の外周縁部に嵌着されたパッキン２の下流側端面をユニオンソケット５の止水端面５ａに圧接させて、水道メーター４の止水端面４ａとの間にパッキン２が覆着されたフランジ部１１を介して配設される。   The packing-integrated check valve is fitted on the water stop end surface 5a side of the secondary union socket 5, and the downstream end surface of the packing 2 fitted on the outer peripheral edge of the check valve body flange portion is connected to the union socket 5. The water stop end surface 5 a is pressed against the water stop end surface 4 a of the water meter 4, and the gasket 2 is disposed through the flange portion 11 covered.

逆止弁本体１は、カートリッジ外殻体１２と摺動弁１３と、摺動弁１３を１次側に付勢するコイルバネ１４によって構成され、カートリッジ外殻体１２の１次側内腔端が弁シート部１５となっている。   The check valve body 1 includes a cartridge outer shell body 12, a sliding valve 13, and a coil spring 14 that urges the sliding valve 13 to the primary side. A valve seat portion 15 is provided.

１次側からの水流は、水道メーター４を通過して２次側の逆止弁に流入し、コイルバネ１４によって１次側に付勢された摺動弁１３を押し開いて２次側配管に流れるが、２次側からの戻り水圧は摺動弁１３が弁シート部１５に圧接されて閉鎖するので、逆流が阻止されるものである。 The water flow from the primary side passes through the water meter 4 and flows into the check valve on the secondary side, pushes open the sliding valve 13 biased to the primary side by the coil spring 14, and enters the secondary side piping. Although flowing, the return water pressure from the secondary side is closed by the sliding valve 13 being pressed against the valve seat portion 15 and closed.

しかし、メンテナンスや交換等のため水道メーター４が取り外されると、１次側から水圧が抜け、２次側の内圧が一挙にパッキン一体型逆止弁に負荷される。 However, when the water meter 4 is removed for maintenance or replacement, the water pressure is released from the primary side, and the internal pressure on the secondary side is loaded on the packing integrated check valve all at once.

従来のパッキン一体型逆止弁は、図９に示されるように、外周縁にパッキン２が嵌着されたフランジ部１１が、水道メーター４の２次側止水端面４ａとユニオンソケット５の１次側止水端面となる鍔５ａの間に挟着支持されているだけであるので、支持を失った逆止弁本体１は図３に示されるように、ユニオンソケット５から抜け落ち戻り水が流出することになる。 As shown in FIG. 9, the conventional packing-integrated check valve has a flange portion 11 with the packing 2 fitted on the outer peripheral edge thereof, which is one of the secondary water stop end surface 4 a of the water meter 4 and the union socket 5. Since the check valve main body 1 that has lost its support is dropped from the union socket 5 as shown in FIG. Will do.

本発明によるパッキン一体型逆止弁は、図1に示すように、シート座面外殻の支持幹基部６にユニオンソケット止水端面内腔への圧入膨縮構造部7を形成し、ユニオンソケットの止水端面内に逆止弁本体1が収嵌される際に、支持幹基部６の圧入膨縮構造部7がユニオンソケット内径に圧係着するので、１次側の水圧が抜け２次側の内圧がパッキン一体型逆止弁に負荷されても、圧入膨縮構造部7の圧係着力により逆止弁本体１が抜け落ちることがないようにした。 As shown in FIG. 1, the packing-integrated check valve according to the present invention forms a press-fitting expansion / contraction structure portion 7 into the union socket water-stop end surface lumen in the support trunk base portion 6 of the seat seat outer shell. When the check valve body 1 is fitted in the water stop end surface, the press-fitting expansion / contraction structure portion 7 of the support stem base 6 is pressure-engaged to the inner diameter of the union socket, so that the water pressure on the primary side is released and the secondary side is released. The check valve main body 1 is prevented from falling off due to the pressure engagement force of the press-fitting expansion / contraction structure 7 even when the internal pressure is applied to the packing integrated check valve.

実施例１は、ユニオンソケット内径に圧係着する外径構造を備えた着合部材６１を着合させて圧入膨縮構造部7を形成するようにした実施例で、支持幹基部６に挿嵌する環状の基体６２の外径部に雄ねじ状のスパイラル突条７１を形成し、上端部に逆止弁本体のフランジ部１１に接合するフランジ６４が形成されている。 The first embodiment is an embodiment in which a press-fitting expansion / contraction structure portion 7 is formed by fitting a fitting member 61 having an outer diameter structure that is press-fitted to an inner diameter of a union socket. A male thread-like spiral ridge 71 is formed on the outer diameter portion of the annular base body 62, and a flange 64 is formed on the upper end portion to be joined to the flange portion 11 of the check valve body.

着合部材の環状基体６１は、図４、図５に示すように支持幹基部６に挿嵌してそのまま溶着して逆止弁本体１と一体化するが、図７の（ａ）に示すように環状基体６２に切り割り６３を入れて支持幹基部６に嵌着させるようにし、或いは、図８の（ｂ）に示すように環状基体の内壁に雌ねじを刻設し、支持幹基部６に刻設した雄ねじと螺合するようにしても良い。なお、支持幹基部６に直接雄ねじ状のスパイラル突条７を刻設しても良いことは勿論である。 As shown in FIGS. 4 and 5, the annular base 61 of the joining member is inserted into the support trunk base 6 and welded as it is to be integrated with the check valve body 1, as shown in FIG. As shown in FIG. 8 (b), an internal thread is formed on the inner wall of the annular base body so that the support base base part 6 You may make it screw with the engraved male screw. Needless to say, the male thread-like spiral ridge 7 may be directly engraved on the support base 6.

雄ねじ状のスパイラル突条は、平滑なユニオンソケット内径への圧係着を、素材の弾性による圧入膨縮と共に、ねじり回動による進退力に関係付けることにより、ユニオンソケット内径への圧入時の押圧力、離脱時の引張力に推進性を加えて無理なく確実な着脱が行えるものである。 The male thread-like spiral ridge has a pressing force at the time of press-fitting into the inner diameter of the union socket by relating the pressure engagement to the smooth inner diameter of the union socket together with the press-fitting expansion / contraction due to the elasticity of the material and the forward / backward force due to torsional rotation. By adding propulsiveness to the pulling force at the time of detachment, it can be attached and detached without difficulty.

実施例２は、環状基体６２に切り割り６３を入れた着合部材の外径構造を、形成した圧入膨縮構造部の先端側をやや小径にして平行突周条による小幅な膨縮構造部７２を形成した２段構造とし、市販品ユニオンソケットの内径に許容誤差があることに対応し、許容誤差によりユニオンソケット内径が大きいときは小幅な膨縮構造部７２の後背部に形成された膨縮構造部に直接圧接係合し、許容誤差によりユニオンソケット内径が小さいときは、先端の小幅な膨縮構造部７２がユニオンソケット内径に圧入されると後背部の膨縮構造部７がユニオンソケット内径に押されて内側に折曲り、シート座面外殻の凹陥溝６５に陥入して確実な係合が図られるようにして、圧入縮径力と係合力を高めるようにした。 In the second embodiment, the outer diameter structure of the joining member in which the slit 63 is inserted into the annular base body 62 has a slightly smaller diameter at the distal end side of the formed press-fitting expansion / contraction structure section, and the small expansion / contraction structure section 72 by the parallel projecting circumferential stripes. In response to the tolerance of the inner diameter of a commercially available union socket, when the inner diameter of the union socket is large due to the tolerance, the expansion / contraction formed in the back of the narrow expansion / contraction structure 72 When the inner diameter of the union socket is small due to tolerance, when the inner diameter of the union socket is small due to tolerance, when the narrow expansion / contraction structure 72 at the tip is press-fitted into the inner diameter of the union socket, So as to be surely engaged by being inserted into the recessed groove 65 of the outer shell of the seat seat surface so as to increase the press-fit diameter reducing force and the engaging force.

即ち、先ず小幅な膨縮構造部７２が圧入膨縮構造部７との境界部７３を境にして縮径してユニオンソケット内径に挿入され、圧入膨縮構造部７を導入すると共に、圧入後は小幅な膨縮構造部７２が復元方向に反発するので、ユニオンソケット内径に対する係合効果が高められる。この場合、先端部の膨縮構造部の後背部に形成される圧入膨縮構造部７の形態は、多数突起の配列や雄ねじ状のスパイラル突条等、任意の形態によっても良い。   That is, first, the narrow expansion / contraction structure part 72 is reduced in diameter at the boundary part 73 with the press-fitting expansion / contraction structure part 7 and inserted into the inner diameter of the union socket. Since the narrow expansion / contraction structure 72 repels in the restoring direction, the engagement effect on the inner diameter of the union socket is enhanced. In this case, the form of the press-fitting expansion / contraction structure part 7 formed on the back part of the expansion / contraction structure part at the tip may be any form such as an array of a large number of protrusions and a male thread-like spiral protrusion.

実施例３は、シート座面外殻の支持幹基部６に雄ねじを刻設し、着合部材の環状基体内径に雌ねじ６６を刻設して螺合により着脱自在として、圧入膨縮構造部７の形態が異なった着合部材を選択的に用いることができるようにしたものである。   In the third embodiment, a male thread is engraved on the support base 6 of the outer shell of the seat seat surface, and a female thread 66 is engraved on the inner diameter of the annular base of the fitting member so that it can be attached and detached by screwing. The joining members having different forms can be selectively used.

本発明に係るパッキン一体型逆止弁とこれを用いた戻り水防止方法は、分譲住宅等、水道配管の本管から支管に分岐配水する際の水道メーター設置とそのメンテナンス等に大きく貢献するもので、水道施設産業上に高度の利用価値を有するものである。   The packing integrated check valve according to the present invention and the return water prevention method using the same greatly contribute to water meter installation and maintenance, etc. when branching water from a main pipe of a water pipe to a branch pipe, such as a condominium. Therefore, it has high utility value in the water supply industry.

１ 逆止弁本体
１１ 逆止弁本体のフランジ部
１２ カートリッジ外殻体
１３ 摺動弁
１４ コイルバネ
１５ 弁シート部
２ 逆止弁本体フランジ部の覆着パッキン
２１ 覆着パッキンの内周面凹嵌溝
３ 袋ナット
３１ 袋ナットの掛止部
３２ 袋ナットの雌ねじ
４ 水道メーター
４ａ 水道メーターの２次側止水端面
４１ 水道メーターの２次側止水端面の雄ねじ
５ ユニオンソケット
５ａ ユニオンソケットの止水端面
５１ ユニオンソケットの段差部
６ シート座面外殻の支持幹基部
６１ 着合部材
６２ 着合部材の環状基体
６３ 着合部材の切り割り
６４ 着合部材のフランジ
６５ シート座面外殻の凹陥溝
６６ 着合部材の環状基体内径の雌ねじ
７ 圧入膨縮構造部
７１ スパイラル突条
７２ 小幅な膨縮構造部
７３ 圧入膨縮構造部との境界部 DESCRIPTION OF SYMBOLS 1 Check valve body 11 Flange part 12 of check valve body 12 Cartridge outer shell 13 Sliding valve 14 Coil spring 15 Valve seat part 2 Cover packing 21 of check valve body flange part Inner peripheral surface recessed groove of cover packing 3 Cap nut 31 Locking portion 32 Cap nut female screw 4 Water meter 4a Water meter secondary water stop surface 41 Water meter secondary water stop surface male screw 5 Union socket 5a Union socket water stop surface 51 Stepped portion of union socket 6 Support base of seat seat outer shell 61 Joining member 62 Ring base of joining member 63 Joining member split 64 Joining member flange 65 Seat seat outer shell recessed groove 66 Internal thread 7 of inner ring of inner member 7 Press-fit expansion / contraction structure 71 Spiral ridge 72 Narrow expansion / contraction structure 73 Boundary with press-fit / expansion structure

Claims (8)

袋ナットによって連結されるジョイント管との間において、２次側のジョイント管となるユニオンソケット等の止水端面内に収嵌され、シート座面を形成する弁シート部と、シート座面に接離自在に圧接係合する摺動弁部と、前記連結される各ジョイント管の止水端面と鍔の間に挟持されるフランジ部とを有し、内周面に凹嵌溝が形成されたリング状パッキンの凹嵌溝が前記フランジ部の外周縁に嵌着されたパッキン一体型逆止弁において、シート座面外殻の支持幹基部にユニオンソケット止水端面内腔への圧入膨縮構造部を形成したことを特徴とするパッキン一体型逆止弁 Between the joint pipe connected by the cap nut, the valve seat part that forms a seat seat surface is fitted in the water stop end surface of a union socket or the like that becomes the secondary joint pipe, and is in contact with the seat seat surface. It has a sliding valve part that presses and engages in a separable manner, and a flange part that is sandwiched between the water stop end face of each of the joint pipes to be connected and the flange, and a concave fitting groove is formed on the inner peripheral surface. In a packing-integrated check valve in which a recessed fitting groove of a ring-shaped packing is fitted to the outer peripheral edge of the flange portion, a press-fitting expansion / contraction structure into a union socket water stop end surface lumen in a support trunk base portion of a seat seat outer shell Packing-integrated check valve characterized by forming a part 圧入膨縮構造部を、合成樹脂等の弾性部材による雄ねじ状螺旋突条とした請求項１記載のパッキン一体型逆止弁 The packing-integrated check valve according to claim 1, wherein the press-fitting expansion / contraction structure portion is a male screw-like spiral ridge made of an elastic member such as a synthetic resin. 支持幹基部に形成する圧入膨縮構造部は、パッキン一体型逆止弁のシート座面外殻の支持幹基部外径部に、ユニオンソケット内径に圧係着する外径構造を備えた着合部材を着合させて形成するようにした請求項１又は請求項２記載のパッキン一体型逆止弁 The press-fitting expansion / contraction structure formed on the support stem base is a fitting member having an outer diameter structure that press-fits to the inner diameter of the union socket on the support stem base outer diameter portion of the seat seating surface outer shell of the packing integrated check valve. 3. A packing-integrated check valve according to claim 1 or 2, which is formed by fitting together. 着合部材を、外径部に圧入膨縮構造部を形成した環状基体に構成し、一端部に逆止弁本体のフランジ部に接合するフランジを形成してパッキン一体型逆止弁のシート座面外殻の支持幹基部に挿嵌接合して溶着するようにした請求項１又は請求項３記載のパッキン一体型逆止弁 The fitting member is configured as an annular base body having a press-fitting expansion / contraction structure portion formed on the outer diameter portion, and a flange to be joined to the flange portion of the check valve main body is formed at one end portion so that the seat seat of the packing integrated check valve 4. A packing-integrated check valve according to claim 1 or 3, wherein the valve is integrated and welded to a support trunk base of the outer shell. 着合部材を、外径部に圧入膨縮構造部を形成した環状基体に構成し、環状基体に切り割りを設定して、パッキン一体型逆止弁のシート座面外殻の支持幹基部に嵌着するようにした請求項１又は請求項３記載のパッキン一体型逆止弁 The fitting member is configured as an annular base body having a press-fitting expansion / contraction structure part formed on the outer diameter part, and a slit is set in the annular base body, and the fitting member is fitted to the support base of the seat seat outer shell of the packing integrated check valve. The packing integrated check valve according to claim 1 or 3, wherein the check valve is attached. 着合部材を、外径部に圧入膨縮構造部を形成した環状基体に構成し、環状基体の内径壁に雌ねじを刻設し、パッキン一体型逆止弁のシート座面外殻の支持幹基部に刻設した雄ねじと螺合するようにした請求項１又は請求項３記載のパッキン一体型逆止弁 The joining member is configured as an annular base body having a press-fitting expansion / contraction structure part on the outer diameter part, a female screw is engraved on the inner diameter wall of the annular base part, and a support trunk for the seat seating surface outer shell of the packing integrated check valve 4. A packing-integrated check valve according to claim 1, wherein the check valve is screwed with a male screw engraved on the base. 圧入膨縮構造部を、先端側をやや小径にして平行突周条又は螺旋突条による小幅な膨縮構造部を形成して２段構造とした請求項１又は請求項２又は請求項３又は請求項５記載のパッキン一体型逆止弁 The press-fitted expansion / contraction structure part is formed in a two-stage structure by forming a small expansion / contraction structure part by a parallel protrusion or a spiral protrusion with a slightly smaller diameter at the tip side. The packing integrated check valve according to claim 5. 袋ナットによって水道メーター端部と２次側のジョイント管を連結する継手方法において、２次側のジョイント管となるユニオンソケット等の内腔に収嵌するパッキン一体型逆止弁の、シート座面外殻の支持幹基部に、ユニオンソケット止水端面内腔への圧入膨縮構造部を形成して同内腔に着脱可能に圧入することにより、継手から水道メーター端部を取り外しても、前記圧入膨縮構造部によりパッキン一体型逆止弁が前記ユニオンソケットの内腔に圧定されて戻り水流出が阻止されるようにしたことを特徴とする戻り水防止方法
In the joint method of connecting the end of the water meter and the secondary joint pipe with a cap nut, the seat seating surface of the packing integrated check valve that fits in the inner cavity of a union socket or the like that becomes the secondary joint pipe Even if the end of the water meter is removed from the joint by forming a press-fitting expansion / contraction structure portion into the union socket water-stop end surface lumen in the support trunk base portion of the outer shell, A return water prevention method characterized in that a packing-integrated check valve is pressed into the lumen of the union socket by the press-fitting expansion / contraction structure portion to prevent return water from flowing out.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016094962A (en) * 2014-11-12 2016-05-26 トヨタ自動車株式会社 Check valve and receptacle structure

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JPS5499123U (en) * 1977-12-26 1979-07-12
JPH05215260A (en) * 1992-02-03 1993-08-24 Fuji Electric Co Ltd Check valve
JPH10103581A (en) * 1996-09-30 1998-04-21 Hotsuto Kk Inserted type check valve structure and inserted type check valve unit
JP2012057323A (en) * 2010-09-07 2012-03-22 Kurimoto Shoji Kk Water supply control method
JP3176509U (en) * 2012-04-13 2012-06-21 株式会社日邦バルブ Check valve and packing mounting structure at the joint between water meter and shimoku

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Publication number Priority date Publication date Assignee Title
JPS5499123U (en) * 1977-12-26 1979-07-12
JPH05215260A (en) * 1992-02-03 1993-08-24 Fuji Electric Co Ltd Check valve
JPH10103581A (en) * 1996-09-30 1998-04-21 Hotsuto Kk Inserted type check valve structure and inserted type check valve unit
JP2012057323A (en) * 2010-09-07 2012-03-22 Kurimoto Shoji Kk Water supply control method
JP3176509U (en) * 2012-04-13 2012-06-21 株式会社日邦バルブ Check valve and packing mounting structure at the joint between water meter and shimoku

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016094962A (en) * 2014-11-12 2016-05-26 トヨタ自動車株式会社 Check valve and receptacle structure
DE102015118843B4 (en) 2014-11-12 2022-08-11 Nitto Kohki Co., Ltd. Check valve and port structure

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