JPH109423A - Overturn gas emergency trip valve - Google Patents
Overturn gas emergency trip valveInfo
- Publication number
- JPH109423A JPH109423A JP8167736A JP16773696A JPH109423A JP H109423 A JPH109423 A JP H109423A JP 8167736 A JP8167736 A JP 8167736A JP 16773696 A JP16773696 A JP 16773696A JP H109423 A JPH109423 A JP H109423A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- seal member
- gas
- seal
- valve seat
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 239000011324 bead Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
- F16K1/465—Attachment of sealing rings to the valve seats
-
- 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
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/005—Particular materials for seats or closure elements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Feeding And Controlling Fuel (AREA)
- Lift Valve (AREA)
- Magnetically Actuated Valves (AREA)
- Safety Valves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ガス供給路の途中
に介設され、傾斜した際にガス供給路を閉鎖する転倒ガ
ス遮断弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shut-off valve which is provided in the middle of a gas supply path and closes the gas supply path when the gas supply path is inclined.
【０００２】[0002]
【従来の技術】この種の転倒ガス遮断弁として、例えば
特開平７−３３２５１９号公報により、ガス供給路の途
中に介設された本体内に往復動自在の弁体と、該弁体の
上流側に位置し該本体の傾斜によって本体内を移動する
ことによって弁体を上流側から押して往動させ弁体のシ
ール面を本体に設けた弁座に押接させてガス供給路を遮
断する可動子とを備えたものが知られている。尚、弁体
は、基体と該基体に貼着された可撓性を有するフッ素ゴ
ムから成り、シール部材にシール面を形成している。2. Description of the Related Art As an overturning gas shut-off valve of this type, for example, Japanese Patent Application Laid-Open No. 7-332519 discloses a reciprocating valve body in a main body provided in the middle of a gas supply path, and an upstream side of the valve body. The valve body is moved from the upstream side by moving the inside of the main body due to the inclination of the main body and moving forward, and the sealing surface of the valve body is pressed against the valve seat provided on the main body to shut off the gas supply path. Those with children are known. The valve body is made of a base and a flexible fluoro rubber adhered to the base, and forms a seal surface on the seal member.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の転倒ガス遮
断弁では、シール面は可撓性を有するシール部材に形成
されているので、シール面が弁座に押接されるとシール
部材は弁座と基体とに挟まれ圧縮方向に弾性変形しシー
ル面は弁座に密着する。ところが、シール部材は比較的
薄いため圧縮方向の変形量は小さく、弁座とシール面と
の間にゴミ等の異物が噛み込むと、噛み込んだ部分を中
心に比較的広い範囲でシール面が弁座から浮きシール性
が損なわれるという不具合が生じる。In the above-mentioned conventional overturning gas shut-off valve, the sealing surface is formed on a flexible sealing member. The seal surface is elastically deformed in the compression direction by being sandwiched between the seat and the base, and the sealing surface is in close contact with the valve seat. However, since the sealing member is relatively thin, the amount of deformation in the compression direction is small, and when foreign matter such as dust is caught between the valve seat and the sealing surface, the sealing surface covers a relatively wide area centering on the caught portion. There arises a problem that the floating sealing property is impaired from the valve seat.
【０００４】本発明は、上記不具合に鑑みて為されたも
のであり、弁座とシール面との間に異物が噛み込んでも
シール性が損なわれない転倒ガス遮断弁を提供すること
を課題とする。[0004] The present invention has been made in view of the above-mentioned problems, and has as its object to provide a falling gas shut-off valve in which the sealing performance is not impaired even when foreign matter is caught between the valve seat and the sealing surface. I do.
【０００５】[0005]
【課題を解決するための手段】本発明は上記課題を解決
するために、バーナへガスを供給するガス供給路に設け
られた開閉弁の、上流又は下流に介設された本体内に往
復動自在の弁体と、該弁体の上流側に位置し該本体の傾
斜によって本体内を移動することによって弁体を上流側
から押して往動させ弁体のシール面を本体に設けた弁座
に押接させてガス供給路を遮断する可動子とを備えた転
倒ガス遮断弁において、上記弁体を、基体と該基体に貼
着される可撓性材料から成るシール部材とで構成し、該
シール部材にシール面を形成すると共に、基体とシール
部材との間のうち少なくともシール面に対応する部分に
隙間を設けたことを特徴とする。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention reciprocates a reciprocating valve in a main body provided upstream or downstream of an on-off valve provided in a gas supply path for supplying gas to a burner. A free valve body and a valve seat located on the upstream side of the valve body and moved in the main body by the inclination of the main body, thereby pushing the valve body from the upstream side and moving forward so that the sealing surface of the valve body is provided on the valve seat provided on the main body. A fall-off gas shut-off valve having a mover for pressing and shutting off a gas supply path, wherein the valve element comprises a base and a seal member made of a flexible material adhered to the base; A seal surface is formed on the seal member, and a gap is provided at least in a portion corresponding to the seal surface between the base and the seal member.
【０００６】基体とシール部材との間に隙間を形成する
とシール面が弁座に押接された際にシール部材が隙間側
にたわむ。圧縮方向の弾性変形量よりたわみによる変形
量の方が大きいので、シール面と弁座との間に異物が噛
み込んでも、シール面の異物が噛み込んだ部分のみが隙
間側に大きく変形し、他の噛み込んでない部分は弁座に
押接することができる。これにより、シール面が弁座か
ら浮き上がらずシール性が損なわれない。If a gap is formed between the base and the seal member, the seal member bends toward the gap when the seal surface is pressed against the valve seat. Since the amount of deformation due to deflection is larger than the amount of elastic deformation in the compression direction, even if foreign matter is caught between the seal surface and the valve seat, only the portion of the seal surface where the foreign matter is caught is greatly deformed to the gap side, Other non-biting portions can be pressed against the valve seat. As a result, the sealing surface does not rise from the valve seat and the sealing performance is not impaired.
【０００７】尚、シール部材にビード部を突設すると弁
座に対してビード部の頂部であるシール面のみが当接
し、弁座に対する単位面積当たりの押接力が増加し、シ
ール面が弁座により密着してシール性が向上する。When a bead portion is protruded from the seal member, only the sealing surface, which is the top of the bead portion, comes into contact with the valve seat, the pressing force per unit area against the valve seat increases, and the sealing surface is reduced. And the sealing property is improved.
【０００８】[0008]
【発明の実施の形態】図１を参照して、１はファンヒー
タやガスコンロ等のガス器具であり、ガス器具１に内蔵
するバーナ２へのガス供給路には、転倒ガス遮断弁３
と、安全弁４と、点消火操作で開閉される主弁５と、流
量調整弁６とが介設されている。バーナ２の側部には、
常火式のパイロットバーナ７が設けられており、該パイ
ロットバーナ７に臨ませて設けた熱電対やフレームロッ
ド等の火炎検知センサ８からの信号をコントローラ９に
入力し、失火時にコントローラ９によって安全弁４を閉
弁するようにしている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, reference numeral 1 denotes a gas appliance such as a fan heater or a gas stove, and a gas supply path to a burner 2 built in the gas appliance 1 is provided with a fall-off gas shut-off valve 3.
, A safety valve 4, a main valve 5 that is opened and closed by a point fire extinguishing operation, and a flow control valve 6. On the side of burner 2,
A pilot burner 7 of an ordinary fire type is provided, and a signal from a flame detection sensor 8 such as a thermocouple or a frame rod provided to face the pilot burner 7 is input to the controller 9. 4 is closed.
【０００９】尚、常火式のパイロットバーナ７に代え
て、点火操作時のみガスを供給する瞬時パイロットバー
ナを設けたり、また、バーナ２に点火電極からの火花放
電で直接点火するようにしても良く、この場合は火炎検
知センサ８をバーナ２に臨ませて設ける。In place of the pilot-type pilot burner 7, an instantaneous pilot burner for supplying gas only during the ignition operation may be provided, or the burner 2 may be directly ignited by a spark discharge from the ignition electrode. In this case, the flame detection sensor 8 is provided facing the burner 2.
【００１０】転倒ガス遮断弁３は、図２に示す如く、弁
筐３０と弁体３１と可動子３２とで構成されるもので、
弁筐３０に、流入ポート３３ａに連なる下側のガス流入
室３３と、流出ポート３４ａに連なる上側のガス流出室
３４と、ガス流入室３３とガス流出室３４とを連通する
弁孔３５ａを開設した弁座３５とを形成し、ガス流入室
３３に、弁座３５に対向するように弁体３１を収納し、
更に、弁体３１の下側に位置させてスチールボールから
成る可動子３２を収納している。該弁体３１は中央部に
ガイド軸３１ｂが突設された基体３１ａと、該基体３１
ａの上面に弁座３５に対向するように貼着された環状の
シール部材３１ｃとで構成されている。該シール部材３
１ｃの上面はシール面となって、弁体３１が押し上げら
れると弁座３５に押接され弁孔３５ａを閉塞する。シー
ル部材３１ｃはフッ素ゴムやブタジエンゴム（ＮＢＲ）
あるいは比較的柔軟なプラスチック材料等の可撓性材料
で形成する。As shown in FIG. 2, the overturning gas shut-off valve 3 comprises a valve housing 30, a valve element 31, and a movable element 32.
In the valve housing 30, a lower gas inflow chamber 33 connected to the inflow port 33a, an upper gas outflow chamber 34 connected to the outflow port 34a, and a valve hole 35a communicating the gas inflow chamber 33 and the gas outflow chamber 34 are opened. The valve body 31 is housed in the gas inflow chamber 33 so as to face the valve seat 35,
Further, a movable element 32 made of a steel ball is stored below the valve element 31. The valve body 31 includes a base 31 a having a guide shaft 31 b protruding at a center portion, and a base 31 a.
and an annular seal member 31c adhered to the upper surface of the valve member a so as to face the valve seat 35. The sealing member 3
The upper surface of 1c is a sealing surface, and when the valve element 31 is pushed up, it is pressed against the valve seat 35 to close the valve hole 35a. The seal member 31c is made of fluoro rubber or butadiene rubber (NBR)
Alternatively, it is formed of a flexible material such as a relatively soft plastic material.
【００１１】弁座３５には非粘着性のコーティングを施
している。非粘着性のコーティングは、例えば商品名テ
フロン等のフッ素樹脂を弁座に被着させることによって
行う。ガス流入室３３の下面は、弁筐３０にパッキン３
６ａを介して装着した蓋板３６により閉塞されている。
蓋板３６の中央に凹部３６ｂを形成し、弁筐３０が傾斜
していない状態（図２（Ａ）の状態）では可動子３２が
凹部３６ｂの周縁に嵌った状態、即ち凹部３６ｂの底面
から可動子３２が若干浮いた状態で安定に支持され、多
少の振動や傾きでは凹部３６ｂから可動子３２が飛び出
さないようにしている。この状態では、シール面が弁座
３５から離間し、転倒ガス遮断弁３は開弁状態に維持さ
れる。The valve seat 35 has a non-stick coating. The non-adhesive coating is performed by, for example, applying a fluororesin such as Teflon (trade name) to the valve seat. The lower surface of the gas inflow chamber 33 is provided with the packing 3 on the valve housing 30.
It is closed by a lid plate 36 mounted via 6a.
A concave portion 36b is formed in the center of the cover plate 36, and in a state where the valve housing 30 is not inclined (the state of FIG. 2A), the movable element 32 is fitted on the periphery of the concave portion 36b, that is, from the bottom of the concave portion 36b. The mover 32 is stably supported in a slightly floating state, so that the mover 32 does not protrude from the recess 36b with a slight vibration or inclination. In this state, the seal surface is separated from the valve seat 35, and the overturning gas shutoff valve 3 is maintained in the open state.
【００１２】ガス器具１の転倒で弁筐３０が所定角度以
上傾くと、図２（Ｂ）に示すように、可動子３２が凹部
３６ｂから外れ、弁体３１が押し上げられて往動しシー
ル部材３１ｃが弁座３５に当接して弁孔３５ａが閉じら
れ、バーナ２及び常火パイロットバーナ７へのガス供給
が遮断される。かくするときは、バーナ２及び常火パイ
ロットバーナ７が消火され、火炎検知センサ８が失火を
検出して安全弁４が閉じられ、弁筐３０が非傾斜状態に
戻って転倒ガス遮断弁３が開弁状態に復帰しても、点火
操作を行わない限り、ガス供給は遮断されたままにな
る。When the valve housing 30 is tilted by a predetermined angle or more when the gas appliance 1 falls, as shown in FIG. 2B, the movable element 32 comes off from the concave portion 36b, and the valve element 31 is pushed up to move forward and the sealing member is moved. 31c abuts on the valve seat 35 to close the valve hole 35a, and the gas supply to the burner 2 and the normal-fire pilot burner 7 is cut off. At this time, the burner 2 and the normal-fire pilot burner 7 are extinguished, the flame detection sensor 8 detects a misfire, the safety valve 4 is closed, the valve housing 30 returns to the non-inclined state, and the inverted gas shut-off valve 3 is opened. Even when the valve returns to the valve state, the gas supply remains shut off unless an ignition operation is performed.
【００１３】弁筐３０には、ガス流出室３４内に位置す
る、弁孔３５ａと同軸上のガイド筒３７が形成されてお
り、基体３１ａに突設したガイド軸３１ｂをガイド筒３
７に摺動自在に嵌合させ、弁体３１が弁孔３５ａに対し
芯ずれしないようにしている。ここで、ガイド軸３１ｂ
は弁孔３５ａに比し遥かに小径に形成でき、従って、弁
孔３５ａの有効開口面積を広くして、ガスの十分な流量
を確保することができる。The valve housing 30 is formed with a guide cylinder 37 located in the gas outflow chamber 34 and coaxial with the valve hole 35a, and a guide shaft 31b projecting from the base 31a is connected to the guide cylinder 3b.
7, so that the valve body 31 does not deviate from the center of the valve hole 35a. Here, the guide shaft 31b
Can be formed to be much smaller in diameter than the valve hole 35a, so that the effective opening area of the valve hole 35a can be increased and a sufficient flow rate of gas can be secured.
【００１４】尚、シール部材３１ｃが弁座３５に押接さ
れたときに、ガス供給が完全に遮断される。すると、ガ
ス流入室３３内のガス圧により弁体３１が押されシール
部材３１ｃが弁座３５に押接され続け、転倒したガス器
具１を起して傾斜状態を解除し弁筐３０を非傾斜状態に
しても転倒ガス遮断弁３は開弁状態に復動しなくなる。
そこで、基体３１ａに小孔３１ｄを貫通させ、シール部
材３１ｃが弁座３５に押接された状態でもガス流入室３
３からガス流出室３４に小孔３１ｄを介して常火パイロ
ットバーナ７が消火できる程度の少量のガスを流し、安
全弁４の閉弁後ガス流出室３４の内圧が上昇して、ガス
流入室３３の内圧による押上げ力がガス流出室３４の内
圧による押下げ力で相殺され、弁筐３０を非傾斜状態に
したとき、弁体３１が自重で弁座３５から離れ復動する
ようにしている。尚、開弁状態のガス流量が例えば０．
００３９ｍ3／ｈであれば、閉弁状態には小孔３１ｄを
通って約５％である０．０００１９ｍ3／ｈの流量のガ
スが流れるようにする。When the seal member 31c is pressed against the valve seat 35, the gas supply is completely shut off. Then, the valve element 31 is pushed by the gas pressure in the gas inflow chamber 33, and the sealing member 31c is kept pressed against the valve seat 35, and the gas appliance 1 that has fallen is raised to release the inclined state and the valve housing 30 is not inclined. Even in this state, the overturning gas shutoff valve 3 does not return to the open state.
Thus, even when the seal member 31c is pressed against the valve seat 35, the gas inflow chamber 3d is made to pass through the small hole 31d through the base 31a.
3 flows into the gas outflow chamber 34 through the small hole 31d through the small hole 31d so that a small amount of gas can be extinguished by the normal fire pilot burner 7. After the safety valve 4 is closed, the internal pressure of the gas outflow chamber 34 increases and the gas inflow chamber 33 When the valve housing 30 is in a non-inclined state, the valve body 31 moves away from the valve seat 35 by its own weight and moves back when the valve housing 30 is in a non-inclined state. . The gas flow rate in the valve open state is, for example, 0.5.
At 0039 m 3 / h, when the valve is closed, a gas having a flow rate of 0.00019 m 3 / h, which is about 5%, flows through the small hole 31d.
【００１５】弁筐３０には、流入ポート３３ａの開口端
及び流出ポート３４ａの開口端に位置する、図３に示す
如きフランジ３３ｂ・３４ｂが形成されており、フラン
ジ３３ｂにプラグ３８を取付けて、プラグ３８に図外の
ガスホースを接続し、また、フランジ３４ｂに安全弁４
との間の接続管３９を取付けている。The valve housing 30 is formed with flanges 33b and 34b as shown in FIG. 3 which are located at the open end of the inflow port 33a and the open end of the outflow port 34a, and a plug 38 is attached to the flange 33b. A gas hose (not shown) is connected to the plug 38, and the safety valve 4 is connected to the flange 34b.
And a connecting pipe 39 between them.
【００１６】図４に示すごとく、弁体３１とシール部材
３１ｃとの間に間隔Ｌ（０．５ｍｍ）の隙間３１ｆが環
状に形成されている。また、シール部材３１ｃの上面に
は環状のビード部３１ｅ（高さＢ＝０．８ｍｍ）を突設
した。従って、弁体３１が可動子３２に押し上げられ往
動すると弁座３５にはビード部３１ｅの頂部がシール面
となって接触し、更に可動子３２に押し上げられること
によりシール部材３１ｃが隙間３１ｆを狭める方向にた
わむことになる。たわみ量は弁体３１とシール部材３１
ｃとが密着している部分の直径Ｄが小さいほど多くな
る。本実施形態ではシール部材３１ｃの直径を１７ｍｍ
として、Ｄを１３ｍｍとした。従って、シール部材３１
ｃは全周にわたって２ｍｍの幅で基体３１ａから突き出
し、隙間３１ｆが形成される。尚、シール部材３１ｃの
厚さｔは約１ｍｍと薄く、たわみによる変形量は間隔Ｌ
分のみ許容され、それ以上は基体３１ａに当接して変形
できないようになっている。従って、ガス圧が大きくシ
ール部材３１ｃが大きな力で弁座３５に押圧されてもシ
ール部材３１ｃが破損したり、シール不良にならない。
また、シール部材３１ｃの上面外周にビード部３１ｅを
突設してシール面を形成したので、シール面が弁座３５
により密着し異物が噛み込んだ場合でもシールが確実に
なる。As shown in FIG. 4, a gap 31f having an interval L (0.5 mm) is formed annularly between the valve body 31 and the seal member 31c. Further, an annular bead portion 31e (height B = 0.8 mm) protrudes from the upper surface of the seal member 31c. Therefore, when the valve element 31 is pushed up by the mover 32 and moves forward, the top of the bead portion 31e comes into contact with the valve seat 35 as a seal surface, and is further pushed up by the mover 32 so that the seal member 31c closes the gap 31f. It will bend in the narrowing direction. The amount of deflection is determined by the valve element 31 and the sealing member 31.
It increases as the diameter D of the portion where c is in close contact is smaller. In the present embodiment, the diameter of the seal member 31c is 17 mm.
Was set to 13 mm. Therefore, the sealing member 31
c protrudes from the base 31a with a width of 2 mm over the entire circumference to form a gap 31f. Note that the thickness t of the seal member 31c is as thin as about 1 mm, and the amount of deformation due to deflection is the distance L.
Only the part is allowed, and beyond that, it cannot be deformed by contacting the base 31a. Therefore, even if the gas pressure is large and the seal member 31c is pressed by the valve seat 35 with a large force, the seal member 31c is not damaged or the sealing is not defective.
Further, since a bead portion 31e is provided to protrude from the outer periphery of the upper surface of the seal member 31c to form a seal surface, the seal surface is formed on the valve seat 35.
Thus, even if a foreign substance is caught by the close contact, the seal is ensured.
【００１７】図中３３ｃは流入ポート３３ａに装着した
フィルタ、３３ｄはフィルタ３３ｃの押えを兼ねるパッ
キンである。また、ガイド筒３７の奥側に連通穴３７ａ
を設け、ガイド筒３７内をガス流出室３４に連通させた
が、該連通穴３７ａはガイド筒３７をドリル加工により
形成した際に生じる切粉を洗浄しやすくするためのもの
である。In the drawing, reference numeral 33c denotes a filter mounted on the inflow port 33a, and reference numeral 33d denotes a packing which also serves to hold the filter 33c. Further, a communication hole 37a is provided in the back side of the guide cylinder 37.
And the inside of the guide cylinder 37 is communicated with the gas outflow chamber 34. The communication hole 37a is for facilitating washing of chips generated when the guide cylinder 37 is formed by drilling.
【００１８】弁体３１の基体３１ａは合成樹脂で形成し
てもよいが、アルミニウム等の金属材料やセラミックス
で形成してもよく、また、シール部材３１ｃを貼着せず
基体３１ａを直接弁座に当接させるようにしても良い。The base 31a of the valve body 31 may be formed of a synthetic resin, but may be formed of a metal material such as aluminum or ceramics. Alternatively, the base 31a may be directly attached to the valve seat without attaching the sealing member 31c. You may make it contact.
【００１９】熱電対等の炎検知センサ８をパイロットバ
ーナ７に臨ませたが、ガスバーナ２に直接臨ませる場
合、ガスバーナ２はパイロットバーナ７に比べて一般に
炎口面積が大きく消火する限界のガス流量値が大きい。
そのため、転倒ガス遮断弁の閉弁時には、上記５％より
も大きい例えば１０％程度のガス流量にすれば良い。ま
た、開閉弁として電磁弁で説明したが、手動により開閉
させるものでもよい。Although the flame detection sensor 8 such as a thermocouple faces the pilot burner 7, the gas burner 2 generally has a larger flame opening area than the pilot burner 7 when the gas burner 2 directly faces the gas burner 7. Is big.
Therefore, when the overturning gas shutoff valve is closed, the gas flow rate may be set to a value larger than the above 5%, for example, about 10%. Further, although the solenoid valve has been described as the on-off valve, it may be manually opened and closed.
【００２０】開閉弁を転倒ガス遮断弁の下流側に設けた
が、上流側に設けてもよい。この場合、遮断弁が閉弁し
た後開閉弁が閉弁し、開閉弁と遮断弁との間の高圧は小
孔３１ｄを介して低下し、遮断弁の上流側と下流側とが
大気圧となって同圧になり、上記高圧による閉弁力が働
かなくなって、弁体３は自重で開弁可能になるため弁体
３が閉弁保持される不具合は生じない。Although the on-off valve is provided on the downstream side of the overturning gas cutoff valve, it may be provided on the upstream side. In this case, the on-off valve closes after the shut-off valve closes, the high pressure between the on-off valve and the shut-off valve decreases through the small hole 31d, and the upstream and downstream sides of the shut-off valve reach atmospheric pressure. As a result, the valve closing force due to the high pressure does not work, and the valve body 3 can be opened by its own weight, so that there is no problem that the valve body 3 is kept closed.
【００２１】ところで、図５に示す従来のものではガイ
ド筒３７の内周面とガイド軸３１ｂとの隙間が大きくな
ると、Ａ点・Ｂ点・Ｃ点の３点で弁体３１が引っかか
り、弁座３５とシール面との間に隙間が生じる場合があ
った。本発明では、基体３１ａとシール部材３１ｃとの
間に隙間３１ｆを設けたのでＡ点の部分がたわんでガイ
ド軸３１ｂをガイド筒３７内に進入させることができ、
図５に示した状態で引っかかることなくシール面を弁座
３５の全周にわたって押接させることができる。In the prior art shown in FIG. 5, when the gap between the inner peripheral surface of the guide cylinder 37 and the guide shaft 31b becomes large, the valve element 31 is caught at three points A, B, and C, and the valve body 31 is caught. There was a case where a gap was formed between the seat 35 and the sealing surface. In the present invention, since the gap 31f is provided between the base 31a and the seal member 31c, the portion at the point A bends and the guide shaft 31b can enter the guide cylinder 37,
In the state shown in FIG. 5, the sealing surface can be pressed against the entire circumference of the valve seat 35 without being caught.
【００２２】[0022]
【発明の効果】以上の説明から明らかなように、本発明
は、弁体とシール部材との間に隙間を形成したのでシー
ル面と弁座との間に異物が噛み込んでもシール性が損な
われない。As is apparent from the above description, according to the present invention, since a gap is formed between the valve body and the sealing member, the sealing performance is impaired even if a foreign substance is caught between the sealing surface and the valve seat. Not.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 本発明遮断弁を設けるガス器具の概略構成を
示す図FIG. 1 is a diagram showing a schematic configuration of a gas appliance provided with a shut-off valve of the present invention.
【図２】 （Ａ）本発明遮断弁の一例の非傾斜状態の断
面図 （Ｂ）その傾斜状態の断面図2A is a cross-sectional view of an example of the shut-off valve of the present invention in a non-tilted state; FIG.
【図３】 図２（Ａ）のIII-III断面図FIG. 3 is a sectional view taken along the line III-III in FIG.
【図４】 弁体の詳細を示す断面図FIG. 4 is a sectional view showing details of a valve body.
【図５】 従来の転倒ガス遮断弁の部分断面図FIG. 5 is a partial cross-sectional view of a conventional inverted gas shut-off valve.
１ ガス器具 ３ 転倒ガス遮断弁 ３０ 弁筐 ３１ 弁体 ３１ｂ ガイド軸 ３１ｃ シール部材 ３１ｅ ビード部 ３１ｆ 隙間 ３２ 可動子 ３５ 弁座 ３５ａ 弁孔 ３７ ガイド筒 DESCRIPTION OF SYMBOLS 1 Gas appliance 3 Inversion gas shutoff valve 30 Valve housing 31 Valve 31b Guide shaft 31c Seal member 31e Bead part 31f Gap 32 Mover 35 Valve seat 35a Valve hole 37 Guide cylinder
Claims (2)
設けられた開閉弁の、上流又は下流に介設された本体内
に往復動自在の弁体と、該弁体の上流側に位置し該本体
の傾斜によって本体内を移動することによって弁体を上
流側から押して往動させ弁体のシール面を本体に設けた
弁座に押接させてガス供給路を遮断する可動子とを備え
た転倒ガス遮断弁において、上記弁体を、基体と該基体
に貼着される可撓性材料から成るシール部材とで構成
し、該シール部材にシール面を形成すると共に、基体と
シール部材との間のうち少なくともシール面に対応する
部分に隙間を設けたことを特徴とする転倒ガス遮断弁。1. An on-off valve provided in a gas supply path for supplying gas to a burner, a valve element reciprocally movable in a main body interposed upstream or downstream, and a valve element located on an upstream side of the valve element. A movable element configured to move the inside of the main body due to the inclination of the main body, push the valve body from the upstream side, move forward, press the sealing surface of the valve body against a valve seat provided on the main body, and shut off a gas supply path. In the inverted gas shut-off valve, the valve body includes a base and a seal member made of a flexible material adhered to the base, and a seal surface is formed on the seal member. Characterized in that a gap is provided at least in a portion corresponding to the seal surface between the two.
ド部を突設し、該ビード部の頂部をシール面としたこと
を特徴とする請求項１記載の転倒ガス遮断弁。2. An overturning gas shut-off valve according to claim 1, wherein an annular bead portion continuous with said seal member is protruded, and a top portion of said bead portion serves as a sealing surface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8167736A JPH109423A (en) | 1996-06-27 | 1996-06-27 | Overturn gas emergency trip valve |
| KR1019970028390A KR100242870B1 (en) | 1996-06-27 | 1997-06-27 | Shut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8167736A JPH109423A (en) | 1996-06-27 | 1996-06-27 | Overturn gas emergency trip valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH109423A true JPH109423A (en) | 1998-01-13 |
Family
ID=15855187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8167736A Pending JPH109423A (en) | 1996-06-27 | 1996-06-27 | Overturn gas emergency trip valve |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH109423A (en) |
| KR (1) | KR100242870B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001299954A (en) * | 2000-04-21 | 2001-10-30 | Hochiki Corp | Sprinkler head |
| CN102407923A (en) * | 2011-08-15 | 2012-04-11 | 溧阳市正翔精密机械有限公司 | Refuge apparatus |
| CN102407924A (en) * | 2011-08-15 | 2012-04-11 | 溧阳市正翔精密机械有限公司 | Refuge ball |
| JP2015524038A (en) * | 2012-06-21 | 2015-08-20 | ボーグワーナー インコーポレーテッド | Exhaust gas turbocharger |
-
1996
- 1996-06-27 JP JP8167736A patent/JPH109423A/en active Pending
-
1997
- 1997-06-27 KR KR1019970028390A patent/KR100242870B1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001299954A (en) * | 2000-04-21 | 2001-10-30 | Hochiki Corp | Sprinkler head |
| CN102407923A (en) * | 2011-08-15 | 2012-04-11 | 溧阳市正翔精密机械有限公司 | Refuge apparatus |
| CN102407924A (en) * | 2011-08-15 | 2012-04-11 | 溧阳市正翔精密机械有限公司 | Refuge ball |
| JP2015524038A (en) * | 2012-06-21 | 2015-08-20 | ボーグワーナー インコーポレーテッド | Exhaust gas turbocharger |
Also Published As
| Publication number | Publication date |
|---|---|
| KR980003115A (en) | 1998-03-30 |
| KR100242870B1 (en) | 2000-03-02 |
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