JP7014451B2 - Check valve for fire extinguishing equipment - Google Patents

Check valve for fire extinguishing equipment Download PDF

Info

Publication number
JP7014451B2
JP7014451B2 JP2019528353A JP2019528353A JP7014451B2 JP 7014451 B2 JP7014451 B2 JP 7014451B2 JP 2019528353 A JP2019528353 A JP 2019528353A JP 2019528353 A JP2019528353 A JP 2019528353A JP 7014451 B2 JP7014451 B2 JP 7014451B2
Authority
JP
Japan
Prior art keywords
valve
fire extinguishing
extinguishing equipment
valve body
check valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2019528353A
Other languages
Japanese (ja)
Other versions
JPWO2019008831A1 (en
Inventor
善幸 小原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Senju Sprinkler Co Ltd
Original Assignee
Senju Sprinkler Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Senju Sprinkler Co Ltd filed Critical Senju Sprinkler Co Ltd
Publication of JPWO2019008831A1 publication Critical patent/JPWO2019008831A1/en
Application granted granted Critical
Publication of JP7014451B2 publication Critical patent/JP7014451B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/28—Accessories for delivery devices, e.g. supports
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/68—Details, e.g. of pipes or valve systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Check Valves (AREA)

Description

本発明は、消火設備機器に設置される逆止弁に関するものである。 The present invention relates to a check valve installed in fire extinguishing equipment.

消火設備は建物内に設置されており、火災の際に自動または手動にて起動され消火活動が行われるものであり、一例として泡消火設備やスプリンクラー設備がある。 Fire extinguishing equipment is installed in the building and is automatically or manually activated in the event of a fire to carry out fire extinguishing activities. Examples include foam fire extinguishing equipment and sprinkler equipment.

図５に示す泡消火設備は、主に駐車場に設置されるものであり一斉開放弁８１が設置された配管の一次側は泡原液が充填されたタンク８３と水源８２に続いており、二次側は泡ヘッド８４が設置されている。 The foam fire extinguishing equipment shown in FIG. 5 is mainly installed in a parking lot, and the primary side of the pipe in which the simultaneous release valve 81 is installed is connected to the tank 83 filled with the foam stock solution and the water source 82. A foam head 84 is installed on the next side.

一斉開放弁８１の内部は隔壁により一次側室８５と二次側室８６に分けられており、隔壁上に穿設された連通口８７は有底円筒状のシリンダー８８によって閉塞されている。シリンダー８８の背面には制御室８９という空間が設けられており、制御室８９は一次側室８５と配管８５ａによって連通している。この配管上には逆止弁９０が設置されており、流体は一次側室８５から制御室８９への通過のみ許容されている。 The inside of the simultaneous release valve 81 is divided into a primary side chamber 85 and a secondary side chamber 86 by a partition wall, and the communication port 87 formed on the partition wall is closed by a bottomed cylindrical cylinder 88. A space called a control chamber 89 is provided on the back surface of the cylinder 88, and the control chamber 89 communicates with the primary side chamber 85 by a pipe 85a. A check valve 90 is installed on this pipe, and fluid is only allowed to pass from the primary concubine 85 to the control chamber 89.

制御室８９には泡ヘッド８４の近傍に敷設された感知配管９１が接続されている。感知配管９１には感知ヘッド９２が設置されており、感知ヘッド９２は火災時に開放動作して感知配管内９１の流体を外部に放出する。感知ヘッド９２の開放によって感知配管９１内の流体が外部に放出されると制御室８９内に充填されていた流体も感知配管９１を通過して外部に放出されるので制御室８９内の流体圧力は減少する。 A sensing pipe 91 laid in the vicinity of the bubble head 84 is connected to the control chamber 89. A sensing head 92 is installed in the sensing pipe 91, and the sensing head 92 operates to open in the event of a fire to discharge the fluid in the sensing pipe 91 to the outside. When the fluid in the sensing pipe 91 is discharged to the outside by opening the sensing head 92, the fluid filled in the control chamber 89 also passes through the sensing pipe 91 and is discharged to the outside, so that the fluid pressure in the control chamber 89 is discharged to the outside. Decreases.

それに伴い逆止弁９０が開放して一次側室８５から制御室８９へ流体が供給されるが、逆止弁９０から制御室８９へ供給される流体の量よりも感知ヘッド９２から放出される流体の量のほうが多いので制御室８９内の圧力は減少してシリンダー８８が連通口８７から離れる。連通口８７の開放により一次側室８５から二次側室８６へ泡水溶液が供給され、泡水溶液は泡ヘッド８４によって泡状になり外部に放出される。 Along with this, the check valve 90 opens and the fluid is supplied from the primary side chamber 85 to the control chamber 89, but the fluid discharged from the sensing head 92 is larger than the amount of fluid supplied from the check valve 90 to the control chamber 89. Since the amount of the fluid is larger, the pressure in the control chamber 89 is reduced and the cylinder 88 is separated from the communication port 87. By opening the communication port 87, the foam aqueous solution is supplied from the primary side chamber 85 to the secondary side chamber 86, and the foam aqueous solution is foamed by the foam head 84 and discharged to the outside.

上記の一斉開放弁に設置された逆止弁は筒状の本体内部に弁体と弁座を有しており、弁体はスプリングによって弁座側に押圧されている（特許文献１参照）。泡消火設備やスプリンクラー設備等の消火設備に設置される機器は、火災時や点検時しか動作しないので長い間弁体が弁座に着座された状態を維持している。弁体と弁座の間にはゴム等のシール材が設置されているが、このシール材が経年劣化によって弁体や弁座に固着してしまい、逆止弁の動作やシール性能に支障をきたすおそれがある。
The check valve installed in the simultaneous release valve has a valve body and a valve seat inside a cylindrical main body, and the valve body is pressed toward the valve seat side by a spring (see Patent Document 1). Equipment installed in fire extinguishing equipment such as foam fire extinguishing equipment and sprinkler equipment operates only during fires and inspections, so the valve body remains seated on the valve seat for a long time. A sealing material such as rubber is installed between the valve body and the valve seat, but this sealing material sticks to the valve body and the valve seat due to deterioration over time, which hinders the operation and sealing performance of the check valve. There is a risk of causing it.

特開２００１－３３６６５９号公報Japanese Unexamined Patent Publication No. 2001-336659

そこで本発明では、上記問題に鑑み、消火設備機器に用いられる逆止弁において、長期間使用してもシール性能が維持可能な逆止弁を提供することを目的としている。 Therefore, in view of the above problems, it is an object of the present invention to provide a check valve that can maintain its sealing performance even after long-term use in a check valve used for fire extinguishing equipment.

上記の目的を達成するために、本発明は以下の消火設備機器用逆止弁を提供する。
すなわち、弁体が収容される穴の内部は隔壁によって流入側と流出側に区切られ、隔壁に穿設された連通穴によって流入側と流出側は通過可能であり、隔壁よりも流出側に設置された弁体と、連通穴に挿通され、隔壁から流出側に突出して設置された弁座と、弁体を弁座側に付勢する付勢部材から成り、弁体には弁座と対向する面にシール部材が設置され、弁座の弁体と当接する部分にフッ素樹脂による面を有している消火設備機器用逆止弁である。In order to achieve the above object, the present invention provides the following check valves for fire extinguishing equipment.
That is, the inside of the hole in which the valve body is housed is divided into the inflow side and the outflow side by the partition wall, and the inflow side and the outflow side can pass through the communication hole drilled in the partition wall, and the inside of the hole is installed on the outflow side rather than the partition wall. It consists of a valve body that has been made, a valve seat that is inserted into the communication hole and is installed so as to project from the partition wall to the outflow side, and an urging member that urges the valve body to the valve seat side. The valve body faces the valve seat. This is a check valve for fire extinguishing equipment, in which a sealing member is installed on the surface of the valve seat and a surface made of fluororesin is provided on the portion of the valve seat that comes into contact with the valve body.

これによれば、弁体と当接する部分にフッ素樹脂による面を有した弁座を隔壁から流出側に突出させて設置したことで、フッ素樹脂による面が何らかの事象により潰れたり、すり減った場合でも弁座の機能を保つことができる。また弁座の弁体と当接する部分をフッ素樹脂にしたことで、弁体側に設置されたシール部材の固着を防ぐことができる。これにより長期間使用してもシール性が維持可能となる。 According to this, by installing the valve seat having a surface made of fluororesin at the part in contact with the valve body so as to project from the partition wall to the outflow side, even if the surface made of fluororesin is crushed or worn by some event. The function of the valve seat can be maintained. Further, by using fluororesin for the portion of the valve seat that comes into contact with the valve body, it is possible to prevent the seal member installed on the valve body side from sticking. This makes it possible to maintain the sealing property even after long-term use.

弁座の弁体と当接する部分に設けられたフッ素樹脂による面は、弁座の表面にフッ素樹脂のコーティングを施して設置することができる。あるいは弁座をフッ素樹脂から形成しても同様の効果が得られる。 The surface made of fluororesin provided at the portion of the valve seat in contact with the valve body can be installed by applying a fluororesin coating to the surface of the valve seat. Alternatively, the same effect can be obtained by forming the valve seat from fluororesin.

弁座は円筒形状であり、一端側が弁体と当接する面となっており、他端側は隔壁に係止される鍔部を有している。弁座は流入側から前記穴の内部に挿通されたサポーターにより固定設置される。これにより弁座における鍔部から一端側までの寸法を所定の範囲内に形成することで、隔壁からの突出量を容易に調整することができる。 The valve seat has a cylindrical shape, one end side is a surface that comes into contact with the valve body, and the other end side has a flange portion that is locked to the partition wall. The valve seat is fixedly installed by a supporter inserted into the hole from the inflow side. As a result, the dimension from the flange portion to one end side of the valve seat is formed within a predetermined range, so that the amount of protrusion from the partition wall can be easily adjusted.

弁座の弁体と当接する部分の幅は、シール部材の幅よりも広く形成されている。これにより弁体の開閉動作によって弁座と弁体の中心軸が若干ずれた場合でもシール性能を得ることができる。上記シール部材としてＯリングを用いることができる。
The width of the portion of the valve seat that comes into contact with the valve body is formed to be wider than the width of the sealing member. As a result, sealing performance can be obtained even when the valve seat and the central axis of the valve body are slightly displaced due to the opening / closing operation of the valve body. An O-ring can be used as the sealing member.

以上説明したように本発明によれば、消火設備機器に用いられる逆止弁について長期間使用してもシール性能を維持することができる。
As described above, according to the present invention, the check valve used in the fire extinguishing equipment can maintain the sealing performance even if it is used for a long period of time.

本発明の消火設備機器用逆止弁の断面図。Sectional drawing of the check valve for fire extinguishing equipment of this invention. 図１の分解断面図。The exploded sectional view of FIG. 本発明の消火設備機器用逆止弁を一斉開放弁に組み込んで設置した際の断面図。The cross-sectional view when the check valve for the fire extinguishing equipment of this invention was incorporated into the simultaneous release valve and installed. 本発明の消火設備機器用逆止弁を流水検知装置に設置したスプリンクラー設備の配管系統図。The piping system diagram of the sprinkler equipment which installed the check valve for the fire extinguishing equipment of this invention in the water flow detection apparatus. 従来の逆止弁を備えた一斉開放弁が設置された泡消火設備の配管系統図。Piping system diagram of foam fire extinguishing equipment equipped with a simultaneous release valve equipped with a conventional check valve.

図１、図２に示す本発明の逆止弁１は、穴１０、弁体２０、弁座３０、付勢部材４０を有している。逆止弁１は一方向のみ通水が可能な構造であり、図１において矢印Ａで示すように下から上への流体の通過だけを許容する。以下、矢印Ａが指す方向を流出側とし、その反対側を流入側とする。 The check valve 1 of the present invention shown in FIGS. 1 and 2 has a hole 10, a valve body 20, a valve seat 30, and an urging member 40. The check valve 1 has a structure that allows water to pass in only one direction, and allows only the passage of fluid from the bottom to the top as shown by the arrow A in FIG. Hereinafter, the direction indicated by the arrow A is referred to as the outflow side, and the opposite side is referred to as the inflow side.

穴１０は本体１１に穿設されており、その内部には弁体２０が収容される。本体１１は筒状をしており外周の両端にネジ１２による接続構造を備えている。穴１０の内部は中間部分１３が両端部分よりも大径となっている。そのため中間部分１３と両端部分の境には段１４、１５が形成されている。段１４側には弁座３０が設置され、段１５側には付勢部材４０を保持するホルダー２６が設置される。 The hole 10 is formed in the main body 11, and the valve body 20 is housed inside the hole 10. The main body 11 has a cylindrical shape and has a connection structure with screws 12 at both ends of the outer circumference. Inside the hole 10, the intermediate portion 13 has a larger diameter than both end portions. Therefore, steps 14 and 15 are formed at the boundary between the intermediate portion 13 and both end portions. A valve seat 30 is installed on the step 14 side, and a holder 26 for holding the urging member 40 is installed on the step 15 side.

弁体２０は円盤状のディスク部２１とディスク部２１の中心から段１５側に延出された棒状のガイドロッド２２を有している。ディスク部２１のガイドロッド２２が設置された側と反対の面には凹部２３が形成され、凹部２３の内部にシール部材としてフッ素ゴム製のＯリング２４が設置されている。 The valve body 20 has a disc-shaped disc portion 21 and a rod-shaped guide rod 22 extending from the center of the disc portion 21 toward the step 15. A recess 23 is formed on the surface of the disk portion 21 opposite to the side on which the guide rod 22 is installed, and a fluororubber O-ring 24 is installed inside the recess 23 as a sealing member.

Ｏリング２４は、その内側に設置されたＯリング押さえ２５により凹部２３の内部に固定設置される。Ｏリング押さえ２５は鍔部２５ａとロッド部２５ｂから成り、鍔部２５ａの側面がＯリング２４と接触している。ロッド部２５ｂは凹部２３の中心からガイドロッド２２側に穿設された穴２３ａに挿通されている。 The O-ring 24 is fixedly installed inside the recess 23 by the O-ring retainer 25 installed inside the O-ring 24. The O-ring retainer 25 is composed of a flange portion 25a and a rod portion 25b, and the side surface of the flange portion 25a is in contact with the O-ring 24. The rod portion 25b is inserted from the center of the recess 23 into the hole 23a formed on the guide rod 22 side.

ガイドロッド２２は穴１０の上端側（流出側）に設置された円筒状のホルダー２６の中心穴２６ａに挿通されている。弁体２０は弁座３０の上端面に対して垂直方向に移動可能であり、ガイドロッド２２は中心穴２６ａの内壁に沿って摺動する。中心穴２６ａは弁体２０が開閉動作する際のガイドとして作用する。ホルダー２６は外周部に牡ネジ２６ｂが刻設されており、牡ネジ２６ｂは穴１０の内周部上端に設置された牝ネジ１６と螺合され、ホルダー２６の位置調整が可能である。 The guide rod 22 is inserted into the center hole 26a of the cylindrical holder 26 installed on the upper end side (outflow side) of the hole 10. The valve body 20 is movable in the direction perpendicular to the upper end surface of the valve seat 30, and the guide rod 22 slides along the inner wall of the center hole 26a. The center hole 26a acts as a guide when the valve body 20 opens and closes. A male screw 26b is engraved on the outer peripheral portion of the holder 26, and the male screw 26b is screwed with a female screw 16 installed at the upper end of the inner peripheral portion of the hole 10, so that the position of the holder 26 can be adjusted.

ホルダー２６とディスク部２１の間には付勢部材４０としてスプリング４１が設置されておりホルダー２６の位置によってスプリング４１がディクス部２１に作用する力を調整できる。ホルダー２６の中心穴２６ａの周囲には通水穴２６ｃが複数設置されている。またホルダー２６の下端にはスプリング４１の内側に挿通される凸部２６ｄが形成されており、スプリング４１の芯ずれを防止している。 A spring 41 is installed as an urging member 40 between the holder 26 and the disc portion 21, and the force of the spring 41 acting on the disk portion 21 can be adjusted depending on the position of the holder 26. A plurality of water passage holes 26c are installed around the center hole 26a of the holder 26. Further, a convex portion 26d inserted inside the spring 41 is formed at the lower end of the holder 26 to prevent the spring 41 from being misaligned.

弁座３０は円筒状をしており樹脂により形成されている。弁座３０に用いられる樹脂としてフッ素樹脂を用いることで、Ｏリング２４と弁座３０との固着を防止できる。弁座３０の材質としてフッ素樹脂の他に、金属製の弁座３０の表面にフッ素樹脂をコーティングしたものを用いることも可能である。あるいは弁体２０と当接する面のみにフッ素樹脂のコーティングを施してもよい。 The valve seat 30 has a cylindrical shape and is made of resin. By using a fluororesin as the resin used for the valve seat 30, it is possible to prevent the O-ring 24 and the valve seat 30 from sticking to each other. As the material of the valve seat 30, in addition to the fluororesin, it is also possible to use a metal valve seat 30 coated with the fluororesin on the surface. Alternatively, the fluororesin coating may be applied only to the surface that comes into contact with the valve body 20.

図中において、弁座３０の上端面はＯリング２４が接触する弁座面となっており、弁体２０と当接する部分（弁座面）の幅は、Ｏリング２４の幅よりも広く形成されている。弁座３０の下端側には穴１０の段１７と係合される鍔部３１が形成されている。段１４と段１７の間は流入側と流出側を区切る隔壁Ｋとなっており、隔壁Ｋに穿設された連通穴１９に弁座３０が挿通される。 In the figure, the upper end surface of the valve seat 30 is a valve seat surface with which the O-ring 24 contacts, and the width of the portion (valve seat surface) in contact with the valve body 20 is formed to be wider than the width of the O-ring 24. Has been done. A flange portion 31 is formed on the lower end side of the valve seat 30 so as to be engaged with the step 17 of the hole 10. Between the steps 14 and 17, there is a partition wall K that separates the inflow side and the outflow side, and the valve seat 30 is inserted into the communication hole 19 formed in the partition wall K.

弁座３０の外周にはＯリング３２が設置される溝３３が形成されている。弁座３０の下端側（流入側）には円筒形状をしたサポーター３４が設置されており、段１７の下方内周部に設置された牝ネジ１８とサポーター３４の外周に設置された牡ネジ３４ａを螺合させて鍔部３１を連通穴１９の内部に固定設置する。弁座３０の上端は段１４から弁体２０側に突出した状態となっており、何らかの事象によって弁座３０の上端面が潰れたり、すり減った場合でも弁座の機能を保つことができるように構成している。 A groove 33 in which the O-ring 32 is installed is formed on the outer periphery of the valve seat 30. A cylindrical supporter 34 is installed on the lower end side (inflow side) of the valve seat 30, a female screw 18 installed on the lower inner peripheral portion of the step 17, and a male screw 34a installed on the outer periphery of the supporter 34. Is screwed in, and the flange portion 31 is fixedly installed inside the communication hole 19. The upper end of the valve seat 30 is in a state of protruding from the step 14 toward the valve body 20, so that the function of the valve seat can be maintained even if the upper end surface of the valve seat 30 is crushed or worn by some event. It is composed.

付勢部材４０はディスク部２１とホルダー２６の間に設置されたスプリング４１である。スプリング４１は平時において弁体２０を弁座３０側へ押圧保持する作用を有する。スプリング４１が弁体２０に作用する力はホルダー２６の位置により調整可能である。弁体２０は差圧により開放動作する。差圧とは弁体２０が閉止している状態において、流出側の流体圧力が降下して流入側の流体圧力との差が生じた状態と、流入側の流体圧力が上昇して流出側の流体圧力との差が生じた状態の２つがある。いずれの場合においても僅かな差圧によって弁体２０は開放せず、ある程度以上の差圧が発生してから弁体２０が開放するように、スプリング４１によって弁体２０を弁座３０へ押圧保持している。具体的には、流水検知装置の最高使用圧力が１．４ＭＰａであり、スプリンクラー設備の配管内部に充填された水の圧力が最大１ＭＰａであるとき、流水検知装置の最高使用圧力を超える前の段階で弁体２０が開放するように、差圧が０．４ＭＰａに達する前に弁体２０が開放するように設定する。好ましくは、差圧が０．１５ＭＰａから０．４ＭＰａの範囲となるように設定する。本実施形態では差圧が０．３ＭＰａから０．４ＭＰａの範囲内で弁体２０が開放するように設定されている。 The urging member 40 is a spring 41 installed between the disc portion 21 and the holder 26. The spring 41 has a function of pressing and holding the valve body 20 toward the valve seat 30 in normal times. The force that the spring 41 acts on the valve body 20 can be adjusted by the position of the holder 26. The valve body 20 operates to open due to the differential pressure. What is the differential pressure? When the valve body 20 is closed, the fluid pressure on the outflow side drops to create a difference from the fluid pressure on the inflow side, and the fluid pressure on the inflow side rises to create a difference on the outflow side. There are two states in which there is a difference from the fluid pressure. In either case, the valve body 20 is not opened by a slight differential pressure, and the valve body 20 is pressed and held against the valve seat 30 by the spring 41 so that the valve body 20 is opened after a certain amount of differential pressure is generated. is doing. Specifically, when the maximum working pressure of the water flow detection device is 1.4 MPa and the pressure of the water filled inside the piping of the sprinkler system is 1 MPa at the maximum, the stage before the maximum working pressure of the water flow detection device is exceeded. The valve body 20 is set to open before the differential pressure reaches 0.4 MPa so that the valve body 20 opens. Preferably, the differential pressure is set in the range of 0.15 MPa to 0.4 MPa. In the present embodiment, the valve body 20 is set to open within the range of the differential pressure of 0.3 MPa to 0.4 MPa.

付勢部材４０はスプリング４１の代わりに、錘やマグネットを用いることができる。あるいはこれらを組み合わせて使用してもよい。 The urging member 40 can use a weight or a magnet instead of the spring 41. Alternatively, these may be used in combination.

上記の逆止弁１を消火設備機器に用いるケースを説明する。先に説明した図５の泡消火設備において逆止弁９０を本発明の逆止弁１に置き換えることができる。逆止弁１は一斉開放弁８１の一次側室８５と制御室８９を連通する配管８５ａ上に設置される。一斉開放弁８１の動作については先に背景技術の項で説明したので詳細な説明は省略する。逆止弁１は流入側が一次室８５と接続し、流出側が制御室８９に接続されており、制御室８９と接続している感知配管９１に設置した感知ヘッド９２の開放によって感知配管９１の流体が外部に放出による降圧により逆止弁１が開放して一斉開放弁８１が開放動作する。この他にも冬季の寒波による感知配管９１内の圧力変化（降圧）によって逆止弁１が開放して、一次室８５から制御室８９へ流体を補充する場合がある。 A case where the above check valve 1 is used for fire extinguishing equipment will be described. The check valve 90 can be replaced with the check valve 1 of the present invention in the foam fire extinguishing system of FIG. 5 described above. The check valve 1 is installed on a pipe 85a that connects the primary side chamber 85 of the simultaneous release valve 81 and the control chamber 89. Since the operation of the simultaneous release valve 81 has been described earlier in the section of background technology, detailed description thereof will be omitted. The check valve 1 has an inflow side connected to the primary chamber 85 and an outflow side connected to the control chamber 89, and the fluid of the sensing pipe 91 is opened by opening the sensing head 92 installed in the sensing pipe 91 connected to the control chamber 89. However, the check valve 1 is opened due to the pressure reduction due to the release to the outside, and the simultaneous release valve 81 is opened. In addition to this, the check valve 1 may be opened due to a pressure change (lowering) in the sensing pipe 91 due to a cold wave in winter, and fluid may be replenished from the primary chamber 85 to the control chamber 89.

図５では逆止弁１を一斉開放弁８１の一次側室８５と制御室８９を連通する配管上に設置したが、これに限らず逆止弁１を一斉開放弁８１の内部に組み込んで構成することもできる、具体的には図３に示す一斉開放弁５０のように、シリンダー５１の内部に一次側室８５から制御室８９に連通する流通路５２を設け、その流通路５２の内部に逆止弁１を組み込むことができる。 In FIG. 5, the check valve 1 is installed on the pipe connecting the primary side chamber 85 of the simultaneous release valve 81 and the control chamber 89, but the check valve 1 is not limited to this and is configured by incorporating the check valve 1 inside the simultaneous release valve 81. It is also possible, specifically, as in the simultaneous release valve 50 shown in FIG. 3, a flow passage 52 communicating from the primary side chamber 85 to the control chamber 89 is provided inside the cylinder 51, and the check valve is stopped inside the flow passage 52. The valve 1 can be incorporated.

図４は流水検知装置６０が設置されたスプリンクラー設備の系統図であり、配管上に設置された流水検知装置６０の一次側と二次側をバイパスする配管６５に逆止弁１が設置されている。流水検知装置６０の内部は隔壁により一次室６１と二次室６２に分けられており、隔壁上に穿設された連通穴６３はスイングチャッキ式の弁体６４によって常時閉塞されている。流水検知装置６０の一次室６１は給水源Ｗに続く配管６１ａと接続されており、二次側６２はスプリンクラーヘッドＳが設置された配管６２ａと接続している。 FIG. 4 is a system diagram of a sprinkler system in which a flow detection device 60 is installed, and a check valve 1 is installed in a pipe 65 that bypasses the primary side and the secondary side of the flow water detection device 60 installed on the pipe. There is. The inside of the water flow detection device 60 is divided into a primary chamber 61 and a secondary chamber 62 by a partition wall, and the communication hole 63 formed on the partition wall is always closed by a swing check type valve body 64. The primary chamber 61 of the flow water detection device 60 is connected to the pipe 61a connected to the water supply source W, and the secondary side 62 is connected to the pipe 62a in which the sprinkler head S is installed.

流水検知装置６０は配管６２ａに設置されたスプリンクラーヘッドＳの作動を検知して流水信号を発する。具体的には、スプリンクラーヘッドＳの作動によって配管６２ａに充填されている流体が流出して降圧すると弁体６４が開いて給水源Ｗと接続した配管６１ａから配管６２ａへ水が供給される。その際の弁体６４の開放により流水信号が出力される。 The flow water detection device 60 detects the operation of the sprinkler head S installed in the pipe 62a and emits a flow water signal. Specifically, when the fluid filled in the pipe 62a flows out due to the operation of the sprinkler head S and the pressure is lowered, the valve body 64 opens and water is supplied from the pipe 61a connected to the water supply source W to the pipe 62a. A running water signal is output by opening the valve body 64 at that time.

逆止弁１は一次室６１と二次室６２の間を連通する配管６５に設置されており、逆止弁１の流入側は二次室６２と接続され、流出側は一次室６１と接続している。逆止弁１は配管６２ａの内部に充填された流体が夏季の熱波によって昇圧した場合に逆止弁１が開放する。これにより昇圧によって流水検知装置６０の破損やスプリンクラーヘッドＳの破損や漏れを防止することができる。 The check valve 1 is installed in a pipe 65 communicating between the primary chamber 61 and the secondary chamber 62, the inflow side of the check valve 1 is connected to the secondary chamber 62, and the outflow side is connected to the primary chamber 61. is doing. The check valve 1 opens when the fluid filled in the pipe 62a is boosted by a heat wave in summer. As a result, it is possible to prevent damage to the water flow detection device 60 and damage or leakage of the sprinkler head S by boosting the pressure.

尚、図４では逆止弁１を流水検知装置６０の一次室６１と二次室６２に接続された配管６５に設置しているが、これに代えて配管６１ａと配管６２ａとを接続する二点鎖線で示す配管６６に設置しても同様の効果を得ることができる。
In FIG. 4, the check valve 1 is installed in the pipe 65 connected to the primary chamber 61 and the secondary chamber 62 of the water flow detection device 60, but instead of this, the pipe 61a and the pipe 62a are connected. The same effect can be obtained by installing it in the pipe 66 indicated by the dotted chain line.

１ 逆止弁
１０ 穴
２０ 弁体
３０ 弁座
４０ 付勢部材
１１ 本体
１２ ネジ（接続構造）
１９ 連通穴
２１ ディスク部
２２ ガイドロッド
２４ Ｏリング（シール部材）
２５ Ｏリング押さえ
３１ 鍔部
３４ サポーター
４１ スプリング
1 Check valve
10 holes
20 valve body
30 valve seat
40 urging member
11 Main body
12 screws (connection structure)
19 Communication hole
21 Disc section
22 Guide rod
24 O-ring (seal member)
25 O-ring retainer
31 Tsuba
34 supporters
41 spring

Claims (13)

弁体が収容される穴の内部は隔壁によって流入側と流出側に区切られ、
前記隔壁に穿設された連通穴によって前記流入側と前記流出側は通過可能であり、
前記隔壁よりも前記流出側に設置された前記弁体と、
前記連通穴に挿通され、前記隔壁から前記流出側に突出して設置された弁座と、
前記弁体を前記弁座側に付勢する付勢部材から成り、
前記弁体には前記弁座と対向する面にシール部材が設置され、
前記弁座の前記弁体と当接する部分にフッ素樹脂による面を有しており、
前記弁座は前記流入側から前記穴の内部に挿通されたサポーターにより固定設置され、
ことを特徴とする消火設備機器用逆止弁。 The inside of the hole in which the valve body is housed is separated into an inflow side and an outflow side by a partition wall.
The inflow side and the outflow side can pass through the communication hole formed in the partition wall.
With the valve body installed on the outflow side of the partition wall,
A valve seat that is inserted into the communication hole and is installed so as to project from the partition wall to the outflow side.
It consists of an urging member that urges the valve body to the valve seat side.
A seal member is installed on the surface of the valve body facing the valve seat, and the valve body is provided with a seal member.
The portion of the valve seat that comes into contact with the valve body has a surface made of fluororesin .
The valve seat is fixedly installed by a supporter inserted into the hole from the inflow side.
A check valve for fire extinguishing equipment that is characterized by this. 前記サポーターは外周部に牡ネジを有しており、前記隔壁よりも前記流入側の内周部に設置された牝ネジと螺合される請求項１記載の消火設備機器用逆止弁。 The check valve for fire extinguishing equipment according to claim 1, wherein the supporter has a male screw on the outer peripheral portion and is screwed with a female screw installed on the inner peripheral portion on the inflow side of the partition wall . 弁体が収容される穴の内部は隔壁によって流入側と流出側に区切られ、The inside of the hole in which the valve body is housed is separated into an inflow side and an outflow side by a partition wall.
前記隔壁に穿設された連通穴によって前記流入側と前記流出側は通過可能であり、The inflow side and the outflow side can pass through the communication hole formed in the partition wall.
前記隔壁よりも前記流出側に設置された前記弁体と、With the valve body installed on the outflow side of the partition wall,
前記連通穴に挿通され、前記隔壁から前記流出側に突出して設置された弁座と、A valve seat that is inserted into the communication hole and is installed so as to project from the partition wall to the outflow side.
前記弁体を前記弁座側に付勢する付勢部材から成り、It consists of an urging member that urges the valve body to the valve seat side.
前記弁体には前記弁座と対向する面にシール部材が設置され、A seal member is installed on the surface of the valve body facing the valve seat, and the valve body is provided with a seal member.
前記弁座の前記弁体と当接する部分にフッ素樹脂による面を有しており、The portion of the valve seat that comes into contact with the valve body has a surface made of fluororesin.
前記弁体は前記弁座面に対して垂直方向に移動可能であり、前記穴の前記流出側に前記弁体の移動をガイドするホルダーが設置されており、The valve body is movable in a direction perpendicular to the valve seat surface, and a holder for guiding the movement of the valve body is installed on the outflow side of the hole.
前記ホルダーの前記弁体側の端には前記付勢部材が設置され、前記ホルダーの外周部に牡ネジを有しており、前記隔壁よりも前記流出側の内周部に刻設された牝ネジと螺合可能であることを特徴とする消火設備機器用逆止弁。The urging member is installed at the end of the holder on the valve body side, has a male screw on the outer peripheral portion of the holder, and is a female screw engraved on the inner peripheral portion on the outflow side of the partition wall. A check valve for fire extinguishing equipment, which is characterized by being screwable with. 前記弁座は円筒形状をしており、一端側が前記弁体と当接する面となっており、他端側は前記隔壁に係止される鍔部を有する請求項１～請求項３いずれか１項記載の消火設備機器用逆止弁。 The valve seat has a cylindrical shape, one end side is a surface that comes into contact with the valve body, and the other end side has a flange portion that is locked to the partition wall. Check valve for fire extinguishing equipment as described in the section . 前記弁座はフッ素樹脂製である請求項１～請求項４いずれか１項記載の消火設備機器用逆止弁。 The check valve for fire extinguishing equipment according to any one of claims 1 to 4 , wherein the valve seat is made of fluororesin. 前記弁座の前記弁体と当接する側の表面にフッ素樹脂がコーティングされている請求項１～請求項４いずれか１項記載の消火設備機器用逆止弁。 The check valve for fire extinguishing equipment according to any one of claims 1 to 4 , wherein the surface of the valve seat on the side in contact with the valve body is coated with a fluororesin. 前記弁座の前記弁体と当接する部分の幅は、シール部材の幅よりも広く形成されている請求項１～請求項６いずれか１項記載の消火設備機器用逆止弁。 The check valve for fire extinguishing equipment according to any one of claims 1 to 6 , wherein the width of the portion of the valve seat that comes into contact with the valve body is wider than the width of the seal member. 前記シール部材はＯリングである請求項１～請求項７いずれか１項記載の消火設備機器用逆止弁。 The check valve for fire extinguishing equipment according to any one of claims 1 to 7 , wherein the sealing member is an O-ring. 前記穴は両端に接続構造を有する筒状の本体に備えられており、接続構造により消火設備機器と接続されている請求項１～請求項８いずれか１項記載の消火設備機器用逆止弁。 The check valve for fire extinguishing equipment according to any one of claims 1 to 8 , wherein the hole is provided in a tubular main body having a connection structure at both ends and is connected to the fire extinguishing equipment by the connection structure. .. 前記穴は消火設備機器の内部に形成された流通路上に設置されている請求項１～請求項９いずれか１項記載の消火設備機器用逆止弁。 The check valve for fire extinguishing equipment according to any one of claims 1 to 9 , wherein the hole is installed on a flow passage formed inside the fire extinguishing equipment. 前記消火設備機器用逆止弁は、消火設備の配管上に設置された流水検知装置の一次側と二次側をバイパスする配管に設置されている請求項１～１０記載の消火設備機器用逆止弁。 The check valve for fire extinguishing equipment according to claim 1 to 10 , wherein the check valve for fire extinguishing equipment is installed in a pipe that bypasses the primary side and the secondary side of the water flow detection device installed on the pipe of the fire extinguishing equipment. Check valve. 前記消火設備機器用逆止弁は、消火設備の配管上に設置された一斉開放弁に設置されている請求項１～１１記載の消火設備機器用逆止弁。 The check valve for fire extinguishing equipment according to claim 1 to 11 , wherein the check valve for fire extinguishing equipment is installed in a simultaneous release valve installed on the piping of the fire extinguishing equipment. 前記消火設備機器用逆止弁は、前記流入側と前記流出側との流体圧力の差が０．４ＭＰａに達する前に前記弁体を開放する請求項１～１２記載の消火設備機器用逆止弁。

The check valve for fire extinguishing equipment according to claim 1 to 12 , wherein the check valve for fire extinguishing equipment opens the valve body before the difference in fluid pressure between the inflow side and the outflow side reaches 0.4 MPa. valve.
JP2019528353A 2017-07-04 2018-03-13 Check valve for fire extinguishing equipment Active JP7014451B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2017131412 2017-07-04
JP2017131412 2017-07-04
PCT/JP2018/009608 WO2019008831A1 (en) 2017-07-04 2018-03-13 Check valve for fire-extinguishing equipment device

Publications (2)

Publication Number Publication Date
JPWO2019008831A1 JPWO2019008831A1 (en) 2020-04-30
JP7014451B2 true JP7014451B2 (en) 2022-02-01

Family

ID=64950783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019528353A Active JP7014451B2 (en) 2017-07-04 2018-03-13 Check valve for fire extinguishing equipment

Country Status (3)

Country Link
JP (1) JP7014451B2 (en)
TW (1) TWM570167U (en)
WO (1) WO2019008831A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001336659A (en) 2000-03-23 2001-12-07 Senju Sprinkler Kk Simultaneously opening valve
JP2008014352A (en) 2006-07-04 2008-01-24 Maezawa Kyuso Industries Co Ltd Check valve unit and filtering and straightening vane
JP2008029876A (en) 2007-10-19 2008-02-14 Senju Sprinkler Kk Flow water detector

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57136062U (en) * 1981-02-19 1982-08-25

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001336659A (en) 2000-03-23 2001-12-07 Senju Sprinkler Kk Simultaneously opening valve
JP2008014352A (en) 2006-07-04 2008-01-24 Maezawa Kyuso Industries Co Ltd Check valve unit and filtering and straightening vane
JP2008029876A (en) 2007-10-19 2008-02-14 Senju Sprinkler Kk Flow water detector

Also Published As

Publication number Publication date
WO2019008831A1 (en) 2019-01-10
JPWO2019008831A1 (en) 2020-04-30
TWM570167U (en) 2018-11-21

Similar Documents

Publication Publication Date Title
US3556137A (en) Control valves
KR200412367Y1 (en) Alarm check valve having over-pressure preventing device
ATE455582T1 (en) DIAPHRAGM ROLL VALVE
JP2009270643A (en) Backflow preventer
MY198047A (en) Fluid control valve having diaphragm that exclusively biases to closed position and methods of fluid control
JP2002213629A (en) Pressure-reducing type backflow prevention device
US2448429A (en) Pressure relief valve
JP7014451B2 (en) Check valve for fire extinguishing equipment
US10066753B2 (en) Safety valve
RU194470U1 (en) INTRACTIVE DEVICE FOR SIGNAL VALVE MEMBRANE UNIVERSAL VALVE
US559881A (en) Automatic relief-valve
US3478780A (en) Irrigation valving
JP2020168265A (en) Deluge valve and check valve structure
US2872150A (en) Flushing valve
JP5190845B2 (en) Simultaneous release valve
US2178866A (en) Liquid level control system
KR101717509B1 (en) Variable type Hydraulic or Pneumatic Check Valve
JP4291403B1 (en) Pilot back pressure valve with check function
US7971598B1 (en) Valve in-line backflow control
AU2013273691A1 (en) Excess Pressure Safety Relief Valve
JP2001333995A (en) Valving element guide mechanism of 'all-at-once' open valve and the same valve
JP3172635U (en) Simultaneous release valve
KR102490165B1 (en) valve for preventing over-pressure
JP3542777B2 (en) Automatic pressure regulating valve
JP4280315B2 (en) Production method of valve body for open valve

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210126

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20211102

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20211210

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20220111

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20220113