JP6773469B2 - Gas valve device - Google Patents

Gas valve device Download PDF

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Publication number
JP6773469B2
JP6773469B2 JP2016141293A JP2016141293A JP6773469B2 JP 6773469 B2 JP6773469 B2 JP 6773469B2 JP 2016141293 A JP2016141293 A JP 2016141293A JP 2016141293 A JP2016141293 A JP 2016141293A JP 6773469 B2 JP6773469 B2 JP 6773469B2
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valve
valve seat
seat member
casing
axial direction
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JP2018013251A (en
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近藤　秀幸
秀幸 近藤
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Rinnai Corp
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Rinnai Corp
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Priority to JP2016141293A priority Critical patent/JP6773469B2/en
Priority to CN201710413490.1A priority patent/CN107631039B/en
Priority to KR1020170090823A priority patent/KR102244779B1/en
Publication of JP2018013251A publication Critical patent/JP2018013251A/en
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    • 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
    • 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
    • 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
    • F16K1/52—Means for additional adjustment of the rate of flow
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/002—Gaseous fuel
    • F23K5/007—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2900/00—Special features of, or arrangements for fuel supplies
    • F23K2900/05002—Valves for gaseous fuel supply lines

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Lift Valve (AREA)

Description

本発明は、内部にガスが流れる筒状のバルブケーシング内に、弁体と、弁体が着座可能な弁座とが設けられたガス弁装置に関する。 The present invention relates to a gas valve device in which a valve body and a valve seat on which the valve body can be seated are provided in a tubular valve casing through which gas flows.

従来、筒状のバルブケーシング内に電磁安全弁と開閉弁とが組み込まれたガス弁装置として、特許文献１により、バルブケーシング内に、電動モータで軸方向に駆動される操作ロッドに連動して軸方向に移動する弁座部材を設けたものが知られている。ここで、電磁安全弁は、弁座部材の軸方向一方の端部に形成した安全弁用弁座に着座可能な弁体と、当該弁体に軸方向一方にのびる弁軸を介して連結される吸着片と、吸着片に対向する電磁石とを備えており、開閉弁は、弁座部材の軸方向他方の端部に形成した開閉弁用弁座に着座可能な、操作ロッドに固定の弁体を備えている。また、バルブケーシング内には、弁座部材を軸方向他方に付勢する付勢手段と、弁座部材の軸方向他方への移動を電磁安全弁の弁体が安全弁用弁座に着座可能な所定位置で制止するストッパ手段とが設けられている。 Conventionally, as a gas valve device in which an electromagnetic safety valve and an on-off valve are incorporated in a tubular valve casing, according to Patent Document 1, a shaft is interlocked with an operation rod driven axially by an electric motor in the valve casing. It is known that a valve seat member that moves in a direction is provided. Here, the electromagnetic safety valve is a suction that is connected to a valve body that can be seated on a safety valve valve seat formed at one end of the valve seat member in the axial direction via a valve shaft that extends to the valve body in one axial direction. The on-off valve is equipped with a piece and an electromagnet facing the suction piece, and the on-off valve has a valve body fixed to an operation rod that can be seated on the on-off valve valve seat formed at the other end in the axial direction of the valve seat member. I have. Further, in the valve casing, a urging means for urging the valve seat member to the other in the axial direction and a predetermined valve body of the electromagnetic safety valve can be seated on the valve seat for the safety valve to move the valve seat member to the other in the axial direction. A stopper means for stopping at a position is provided.

このものでは、操作ロッドを軸方向一方に移動させると、開閉弁の弁体が開閉弁用弁座に着座し、以後、弁座部材が開閉弁の弁体を介して作用する押圧力により操作ロッドに連動して軸方向一方に移動する。そして、安全弁用弁座が電磁安全弁の弁体に当接し、当該弁体が弁座部材に押されて軸方向一方に移動して、吸着片が電磁石に当接する開弁位置に到達する。この状態で電磁石に通電して、電磁安全弁の弁体を開弁位置に吸着した後、操作ロッドを軸方向他方に移動させる。これにより、付勢手段の付勢力で操作ロッドに追従して弁座部材が軸方向他方に移動し、安全弁用弁座が開弁位置に吸着される弁体から離れて電磁安全弁が開弁される。その後、弁座部材がストッパ手段で制止される所定位置に復帰してから更に操作軸ロッドを軸方向他方に移動させることにより、開閉弁の弁体が開閉弁用弁座から離れて開閉弁が開弁される。 In this device, when the operation rod is moved in one axial direction, the valve body of the on-off valve is seated on the valve seat for the on-off valve, and thereafter, the valve seat member is operated by the pressing force acting through the valve body of the on-off valve. It moves in one axial direction in conjunction with the rod. Then, the valve seat for the safety valve comes into contact with the valve body of the electromagnetic safety valve, and the valve body is pushed by the valve seat member and moves in one axial direction to reach the valve opening position where the suction piece abuts on the electromagnet. In this state, the electromagnet is energized to attract the valve body of the electromagnetic safety valve to the valve opening position, and then the operating rod is moved to the other in the axial direction. As a result, the valve seat member moves axially to the other side following the operating rod by the urging force of the urging means, and the electromagnetic safety valve is opened away from the valve body in which the safety valve valve seat is attracted to the valve opening position. To. After that, after the valve seat member returns to the predetermined position where it is stopped by the stopper means, the operation shaft rod is further moved to the other axial direction, so that the valve body of the on-off valve is separated from the on-off valve valve seat and the on-off valve is opened. The valve is opened.

ここで、上記従来例のものでは、バルブケーシングの内周面と弁座部材の外周面との間の隙間にガスが流れないようにシールするシール部材として、弁座部材の外周面にＯリングを装着している。然し、Ｏリングは、弁座部材の外周面とバルブケーシングの内周面との間で圧縮させてシール性を確保するものであり、弁座部材を軸方向に移動させる際の摺動抵抗が大きくなる。そのため、電動モータの消費電力が大きくなり、電源として乾電池を用いる場合、電池寿命が短くなる不具合がある。 Here, in the above-mentioned conventional example, an O-ring is formed on the outer peripheral surface of the valve seat member as a sealing member for sealing the gap between the inner peripheral surface of the valve casing and the outer peripheral surface of the valve seat member so that gas does not flow. Is attached. However, the O-ring is compressed between the outer peripheral surface of the valve seat member and the inner peripheral surface of the valve casing to ensure the sealing property, and the sliding resistance when the valve seat member is moved in the axial direction is increased. growing. Therefore, the power consumption of the electric motor becomes large, and when a dry battery is used as a power source, there is a problem that the battery life is shortened.

尚、上記したバルブケーシング内に電磁安全弁と開閉弁を組み込むガス弁装置に限らず、バルブケーシング内に電動モータで軸方向に駆動される操作ロッドに連動して軸方向に移動する弁座部材が設けられるガス弁装置であって、弁座部材の外周面に、バルブケーシングの内周面との間の隙間をシールするＯリングを装着するものであれば、上記と同様の不具合を生ずる。 Not limited to the gas valve device in which the electromagnetic safety valve and the on-off valve are incorporated in the valve casing described above, the valve seat member that moves in the axial direction in conjunction with the operation rod driven in the axial direction by the electric motor is included in the valve casing. If the gas valve device to be provided is equipped with an O-ring that seals the gap between the valve seat member and the inner peripheral surface of the valve casing, the same problem as described above occurs.

特開２０１３−６８３５６号公報Japanese Unexamined Patent Publication No. 2013-68356

本発明は、以上の点に鑑み、バルブケーシングの内周面と弁座部材の外周面との間の隙間にガスが流れないようにシールするシール部材により弁座部材の摺動抵抗が大きくなって電動モータの消費電力が増加することを回避できるようにしたガス弁装置を提供することをその課題としている。 In view of the above points, the present invention increases the sliding resistance of the valve seat member by the sealing member that seals the gap between the inner peripheral surface of the valve casing and the outer peripheral surface of the valve seat member so that gas does not flow. The challenge is to provide a gas valve device that can avoid an increase in power consumption of the electric motor.

上記課題を解決するために、本発明は、内部にガスが流れる筒状のバルブケーシング内に、弁体と、前記弁体が着座可能な弁座とが設けられたガス弁装置であって、前記バルブケーシング内に、電動モータで軸方向に駆動される操作ロッドに連動して軸方向に移動する弁座部材が設けられ、前記弁座部材の軸方向端部に前記弁座が形成されると共に、前記バルブケーシングの内周面と前記弁座部材の外周面との間の隙間にガスが流れないようにシールするシール部材が設けられるものにおいて、前記シール部材は、外周部が前記バルブケーシングに固定され、内周部が前記弁座部材に固定されたベロフラムで構成され、前記弁座部材の外周面の軸方向一部に、前記バルブケーシングの内周面に摺接する環状突起部が形成されると共に、前記弁座部材の前記環状突起部から離隔した部分に、前記バルブケーシングの内周面に近接対向して前記弁座部材が傾くことを抑制するガイド部が設けられることを特徴とする。 In order to solve the above problems, the present invention is a cylindrical valve casing in which the gas flows inside the valve body, the valve body is a gas valve device provided with seating available valve seat, in the valve casing, a valve seat member which moves in the axial direction is provided in conjunction with the operation rod is driven axially by an electric motor, the valve seat is formed in the axial end portion of the valve seat member together, in what the seal sealing member so that the gas does not flow into the gap between the inner peripheral surface of the valve casing and the outer peripheral surface of the valve seat member is provided, said sealing member, an outer peripheral portion of the valve casing is fixed to it consists of a bellofram the inner peripheral portion fixed to the valve seat member, in the axial direction part of the outer circumferential surface of the valve seat member, in sliding contact the annular projection on the inner circumferential surface of the valve casing form while being in spaced part from the annular protrusion of the valve seat member, characterized Rukoto guide portion is provided to suppress that the valve seat member proximate faces the inner circumferential surface of the valve casing is tilted And.

本発明によれば、シール部材をベロフラムで構成することにより、シール部材としてＯリングを用いる従来例のものに比し、弁座部材の摺動抵抗が大幅に減少する。そのため、電動モータの消費電力を低減して、電池寿命をのばすことができる。 According to the present invention, by forming the seal member with a bellofram, the sliding resistance of the valve seat member is significantly reduced as compared with the conventional example in which the O-ring is used as the seal member. Therefore, the power consumption of the electric motor can be reduced and the battery life can be extended.

また、本発明においては、ベロフラムの径方向の撓みで弁座部材が径方向に動くことがないように、上述した通り、弁座部材の外周面の軸方向一部に、バルブケーシングの内周面に摺接する環状突起部を形成する必要がある。然し、環状突起部を設けるだけでは、環状突起部を支点にして弁座部材が傾き、バルブケーシングに対する弁座部材のこじりを生ずる可能性がある。そのため、本発明においては、上述した通り、上記環状突起部を設けるだけでなく、弁座部材の環状突起部から離隔した部分に、バルブケーシングの内周面に近接対向して弁座部材が傾くことを抑制するガイド部を設けることが望ましい。 Further, in the present invention, as described above , the inner circumference of the valve casing is formed on a part of the outer peripheral surface of the valve seat member in the axial direction so that the valve seat member does not move in the radial direction due to the radial deflection of the bellofram. It is necessary to form an annular protrusion that is in sliding contact with the surface. However, if only the annular protrusion is provided, the valve seat member may be tilted with the annular protrusion as a fulcrum, and the valve seat member may be twisted with respect to the valve casing. Therefore, in the present invention, as described above , not only the annular protrusion is provided, but also the valve seat member is tilted in a portion separated from the annular protrusion of the valve seat member so as to be close to the inner peripheral surface of the valve casing. It is desirable to provide a guide portion that suppresses this.

更に、本発明において、ベロフラムは、その内周部を弁座部材に埋め込んだ状態で成形されるゴム製の成形品で構成されることが望ましい。これによれば、ベロフラムの内周部を弁座部材に確実に密着させて、シール性を確保できる。 Further, in the present invention, it is desirable that the belofram is composed of a rubber molded product that is molded with its inner peripheral portion embedded in the valve seat member. According to this, the inner peripheral portion of the beloflame can be surely brought into close contact with the valve seat member, and the sealing property can be ensured.

この場合、ベロフラムの内周部から弁座部材の内部を軸方向にのびて端部が弁座に露出する、ベロフラムと一体の筒部が設けられ、弁座に露出する筒部の端部により、弁体が弁座に着座したときのシール性を確保する弁シールが構成されるようにすれば、弁シールを別途設ける必要がなく、コストダウンを図ることができる。 In this case, a tubular portion integrated with the bellofram is provided so that the inside of the valve seat member extends axially from the inner peripheral portion of the bellofram and the end portion is exposed to the valve seat, and the end portion of the tubular portion exposed to the valve seat If the valve seal is configured to ensure the sealing property when the valve body is seated on the valve seat, it is not necessary to separately provide the valve seal, and the cost can be reduced.

尚、バルブケーシング内に電磁安全弁と開閉弁とが組み込まれたガス弁装置であって、上記従来例と同様に、電磁安全弁は、弁座部材の軸方向一方の端部に形成した安全弁用弁座に着座可能な弁体と、当該弁体に軸方向一方にのびる弁軸を介して連結される吸着片と、吸着片に対向する電磁石とを備え、開閉弁は、弁座部材の軸方向他方の端部に形成した開閉弁用弁座に着座可能な、操作ロッドに固定の弁体を備え、バルブケーシング内に、弁座部材を軸方向他方に付勢する付勢手段と、弁座部材の軸方向他方への移動を電磁安全弁の弁体が安全弁用弁座に着座可能な所定位置で制止するストッパ手段とが設けられるものにおいて、ベロフラムの内周部から弁座部材の内部を軸方向にのびるベロフラムと一体の筒部を設ける場合は、筒部の端部を開閉弁用弁座に露出させ、この筒部の端部により、開閉弁の弁体が開閉弁用弁座に着座したときのシール性を確保する開閉弁用の弁シールを構成すればよい。 It should be noted that this is a gas valve device in which an electromagnetic safety valve and an on-off valve are incorporated in the valve casing, and the electromagnetic safety valve is a safety valve valve formed at one end in the axial direction of the valve seat member, as in the above conventional example. A valve body that can be seated on the seat, a suction piece that is connected to the valve body via a valve shaft that extends in one axial direction, and an electromagnet that faces the suction piece are provided, and the on-off valve is in the axial direction of the valve seat member. A valve body fixed to the operation rod, which can be seated on the valve seat for the on-off valve formed at the other end, is provided, and an urging means for urging the valve seat member to the other axially in the valve casing and a valve seat. In a device provided with a stopper means for stopping the movement of the member in the other direction in the axial direction at a predetermined position where the valve body of the electromagnetic safety valve can be seated on the valve seat for the safety valve, the inside of the valve seat member is pivoted from the inner peripheral portion of the beloflame. When providing a tubular portion integrated with the beloflam extending in the direction, the end of the tubular portion is exposed to the on-off valve valve seat, and the valve body of the on-off valve is seated on the on-off valve valve seat by the end of this tubular portion. A valve seal for the on-off valve that secures the sealing property at the time of the operation may be configured.

本発明の第１実施形態のガス弁装置の断面図。Sectional drawing of the gas valve device of 1st Embodiment of this invention. 第１実施形態のガス弁装置の作動説明図。The operation explanatory view of the gas valve device of 1st Embodiment. 本発明の第２実施形態のガス弁装置の断面図。FIG. 3 is a sectional view of a gas valve device according to a second embodiment of the present invention. 本発明の第３実施形態のガス弁装置の断面図。FIG. 3 is a cross-sectional view of a gas valve device according to a third embodiment of the present invention. 本発明の第４実施形態のガス弁装置の断面図。FIG. 3 is a sectional view of a gas valve device according to a fourth embodiment of the present invention.

図１を参照して、本発明の実施形態のガス弁装置は、筒状のバルブケーシング１と、バルブケーシング１内の軸方向一方（図１で右方）寄りの部分に配置した電磁安全弁２と、バルブケーシング１内の軸方向他方（図１で左方）寄りの部分に、電磁安全弁２と直列に配置した開閉弁３と、バルブケーシング１内に軸方向他方から挿入される操作ロッド４と、バルブケーシング１の軸方向他方の端部に取り付けたボックス１１の外端面に搭載される電動モータ５と、バルブケーシング１内に操作ロッド４に連動して軸方向に移動するように設けられた樹脂製又は真鍮やアルミ合金等の金属製の弁座部材６とを備えている。 With reference to FIG. 1, the gas valve device according to the embodiment of the present invention includes a tubular valve casing 1 and an electromagnetic safety valve 2 arranged in a portion of the valve casing 1 closer to one axial direction (to the right in FIG. 1). An on-off valve 3 arranged in series with the electromagnetic safety valve 2 and an operation rod 4 inserted into the valve casing 1 from the other axial direction in a portion closer to the other axial direction (left in FIG. 1). The electric motor 5 mounted on the outer end surface of the box 11 attached to the other end in the axial direction of the valve casing 1 and the valve casing 1 are provided so as to move in the axial direction in conjunction with the operation rod 4. It is provided with a valve seat member 6 made of resin or a metal such as brass or aluminum alloy.

電動モータ５の出力軸５１にはナット５２が固定されており、このナット５２に操作ロッド４の軸方向他方の端部に形成した雄ねじ部４１を螺入している。そして、電動モータ５の正逆転で操作ロッド４が軸方向に往復動されるようにしている。 A nut 52 is fixed to the output shaft 51 of the electric motor 5, and a male screw portion 41 formed at the other end in the axial direction of the operation rod 4 is screwed into the nut 52. Then, the operation rod 4 is reciprocated in the axial direction by the forward and reverse rotation of the electric motor 5.

バルブケーシング１には、電磁安全弁２の上流側に位置するガス流入口１ａと、開閉弁３の下流側に位置するガス流出口１ｂとが開設されている。そして、電磁安全弁２と開閉弁３とが共に開弁したとき、ガス流入口１ａからガス流出口１ｂにガスが流れ、図示省略したコンロ等のガス器具のバーナにガスが供給される。 The valve casing 1 is provided with a gas inflow port 1a located on the upstream side of the electromagnetic safety valve 2 and a gas outflow port 1b located on the downstream side of the on-off valve 3. When both the electromagnetic safety valve 2 and the on-off valve 3 are opened, gas flows from the gas inlet 1a to the gas outlet 1b, and the gas is supplied to the burner of a gas appliance such as a stove (not shown).

電磁安全弁２は、弁座部材６の軸方向一方の端部に形成した安全弁用弁座２１と、この弁座２１に着座可能なゴム製の弁体２２と、弁体２２を軸方向他方に付勢して安全弁用弁座２１に着座させる弁ばね２３と、弁体２２に軸方向一方にのびる弁軸２２ａを介して連結した吸着片２４と、吸着片２４に対向する電磁石２５とを備えている。そして、弁体２２を吸着片２４が電磁石２５に当接する開弁位置まで弁ばね２３に抗して押動させた状態で電磁石２５に通電することにより、弁体２２が開弁位置に吸着保持される。また、バーナに付設する火炎検知素子によりバーナの失火が検知されたときは、電磁石２５への通電を停止し、弁体２２を弁ばね２３により安全弁用弁座２１に着座する閉弁位置に復帰させて電磁安全弁２を閉弁し、ガスの流出を防止する。 The electromagnetic safety valve 2 has a safety valve valve seat 21 formed at one end of the valve seat member 6 in the axial direction, a rubber valve body 22 that can be seated on the valve seat 21, and a valve body 22 on the other axial direction. A valve spring 23 that is urged to be seated on the valve seat 21 for a safety valve, an suction piece 24 that is connected to the valve body 22 via a valve shaft 22a that extends in one axial direction, and an electromagnet 25 that faces the suction piece 24 are provided. ing. Then, the valve body 22 is attracted and held at the valve opening position by energizing the electromagnet 25 in a state where the valve body 22 is pushed against the valve spring 23 to the valve opening position where the suction piece 24 abuts on the electromagnet 25. Will be done. When the flame detection element attached to the burner detects a misfire of the burner, the energization of the electromagnet 25 is stopped, and the valve body 22 is returned to the closed position where the valve body 22 is seated on the valve seat 21 for the safety valve by the valve spring 23. The electromagnetic safety valve 2 is closed to prevent the outflow of gas.

バルブケーシング１内には、弁座部材６の軸方向他方への移動を電磁安全弁２の弁体２２が着座可能な所定位置で制止する、バルブケーシング１の内面に形成した径方向の段差から成るストッパ手段６１と、弁座部材６を軸方向他方に付勢して上記所定位置に弾力的に保持するコイルスプリングから成る付勢手段６２とが設けられている。 The inside of the valve casing 1 is composed of a radial step formed on the inner surface of the valve casing 1 that stops the movement of the valve seat member 6 in the other direction in the axial direction at a predetermined position where the valve body 22 of the electromagnetic safety valve 2 can be seated. The stopper means 61 and the urging means 62 including a coil spring that urges the valve seat member 6 to the other in the axial direction and elastically holds the valve seat member 6 at the predetermined position are provided.

開閉弁３は、弁座部材６の軸方向他方の端部に形成した開閉弁用弁座３１と、この弁座３１に着座可能であって、操作ロッド４の軸方向一方の端部に固定された弁体３２とを備えている。弁体３２は、弁座部材６に安全弁用と開閉弁用の両弁座２１，３１に開口するように開設した弁孔６３を閉塞するように弁座３１に着座する主弁体部３２１と、弁孔６３に挿入されるニードル弁状の副弁体部３２２とを備える。尚、主弁体部３２１の開閉弁用弁座３１に対向する端面にはゴム製の弁シール３２ａが貼り付けられている。また、弁体３２には、弁孔６３と開閉弁３の下流側とを常時連通するバイパス孔３２ｂが形成されており、主弁体部３２１を開閉弁用弁座３１に着座させた状態で最小量のガスが流れるようにしている。 The on-off valve 3 can be seated on the on-off valve valve seat 31 formed at the other end in the axial direction of the valve seat member 6 and the valve seat 31 and fixed to one end in the axial direction of the operation rod 4. It is provided with a valve body 32. The valve body 32 has a main valve body portion 321 seated in the valve seat 31 so as to close the valve holes 63 opened in the valve seat member 6 so as to open both the valve seats 21 and 31 for the safety valve and the on-off valve. , A needle valve-shaped auxiliary valve body portion 322 to be inserted into the valve hole 63. A rubber valve seal 32a is attached to the end face of the main valve body portion 321 facing the valve seat 31 for the on-off valve. Further, the valve body 32 is formed with a bypass hole 32b that constantly communicates between the valve hole 63 and the downstream side of the on-off valve 3, and the main valve body portion 321 is seated on the on-off valve valve seat 31. The minimum amount of gas is allowed to flow.

以上の構成によれば、操作ロッド４を軸方向一方に移動させると、開閉弁３の弁体３２が開閉弁用弁座３１に着座し、以後、弁座部材６が開閉弁３の弁体３２を介して作用する押圧力により操作ロッド４に連動して軸方向一方に移動する。そして、安全弁用弁座２１が電磁安全弁２の弁体２２に当接して、図２（ａ）に示す如く、弁体２２が弁ばね２３の付勢力に抗して開弁位置に押動される。この状態で電磁石２５に通電され、弁体２２が開弁位置に吸着保持される。次に、操作ロッド４を軸方向他方に移動させるが、この際、弁座部材６は、ストッパ手段６１により制止される所定位置まで付勢手段６２の付勢力により操作ロッド４に追従して軸方向他方に移動し、安全弁用弁座２１が開弁位置に吸着保持される弁体２２から離れて、電磁安全弁２が開弁される。その後、図２（ｂ）に示す如く、所定位置に制止される弁座部材６に対し操作ロッド４が更に軸方向他方に移動し、開閉弁３の弁体３２の主弁体部３２１が開閉弁用弁座３１から所定距離離れて、点火に適した量のガスがバーナに供給され、バーナに点火される。その後は、電動モータ５により操作ロッド４の位置を調節することで、副弁体部３２２によるガス流量の調節が行われる。 According to the above configuration, when the operation rod 4 is moved in one axial direction, the valve body 32 of the on-off valve 3 is seated on the on-off valve valve seat 31, and thereafter, the valve seat member 6 is the valve body of the on-off valve 3. It moves in one axial direction in conjunction with the operation rod 4 by the pressing force acting via the 32. Then, the valve seat 21 for the safety valve comes into contact with the valve body 22 of the electromagnetic safety valve 2, and as shown in FIG. 2A, the valve body 22 is pushed to the valve opening position against the urging force of the valve spring 23. To. In this state, the electromagnet 25 is energized, and the valve body 22 is attracted and held at the valve opening position. Next, the operating rod 4 is moved to the other axial direction. At this time, the valve seat member 6 follows the operating rod 4 by the urging force of the urging means 62 to a predetermined position stopped by the stopper means 61. The electromagnetic safety valve 2 is opened by moving in the other direction and away from the valve body 22 in which the safety valve valve seat 21 is attracted and held at the valve opening position. After that, as shown in FIG. 2B, the operation rod 4 further moves to the other axial direction with respect to the valve seat member 6 which is stopped at a predetermined position, and the main valve body portion 321 of the valve body 32 of the on-off valve 3 opens and closes. At a predetermined distance from the valve seat 31 for a valve, a gas suitable for ignition is supplied to the burner, and the burner is ignited. After that, the position of the operating rod 4 is adjusted by the electric motor 5, so that the gas flow rate is adjusted by the auxiliary valve body portion 322.

ここで、本実施形態では、バーナ失火時に電磁安全弁２の閉弁指令が出されても、電磁安全弁２の弁体２２が開弁位置に保持されたままになる開故障を生じた場合、操作ロッド４を軸方向一方に移動させることにより、開弁位置に存する弁体２２に安全弁用弁座２１が当接して、電磁安全弁２が閉弁され、ガスの流出が防止される。また、操作ロッド４が電磁安全弁２の弁体２２の開弁位置に対応する前進端位置に電動モータ５の故障やゴミ噛み等でロックしても、電磁安全弁２は閉弁されているから、ガスの放出を防止することができる。従って、電磁安全弁２の開故障を生じたときや操作ロッド４が前進端位置にロックしたときのフェールセーフを図ることができる。 Here, in the present embodiment, even if a valve closing command for the electromagnetic safety valve 2 is issued at the time of a burner misfire, the valve body 22 of the electromagnetic safety valve 2 remains held at the valve opening position. By moving the rod 4 in one axial direction, the valve seat 21 for the safety valve comes into contact with the valve body 22 at the valve opening position, the electromagnetic safety valve 2 is closed, and the outflow of gas is prevented. Further, even if the operation rod 4 is locked at the forward end position corresponding to the valve opening position of the valve body 22 of the electromagnetic safety valve 2 due to a failure of the electric motor 5 or dust biting, the electromagnetic safety valve 2 is closed. It is possible to prevent the release of gas. Therefore, fail-safe can be achieved when the electromagnetic safety valve 2 fails to open or when the operating rod 4 is locked to the forward end position.

ところで、バルブケーシング１の内周面と弁座部材６の外周面との間の隙間にガスが流れないようにシールするシール部材として、弁座部材６の外周面にＯリングを装着することも考えられる。然し、Ｏリングは、弁座部材６の外周面とバルブケーシング１の内周面との間で圧縮させてシール性を確保するものであり、弁座部材６を軸方向に移動させる際の摺動抵抗が大きくなる。そのため、電動モータ５の消費電力が大きくなり、電源として乾電池を用いる場合、電池寿命が短くなる不具合がある。 By the way, an O-ring may be attached to the outer peripheral surface of the valve seat member 6 as a sealing member for sealing the gap between the inner peripheral surface of the valve casing 1 and the outer peripheral surface of the valve seat member 6 so that gas does not flow. Conceivable. However, the O-ring is compressed between the outer peripheral surface of the valve seat member 6 and the inner peripheral surface of the valve casing 1 to ensure the sealing property, and is a slide when the valve seat member 6 is moved in the axial direction. The dynamic resistance increases. Therefore, the power consumption of the electric motor 5 becomes large, and when a dry battery is used as a power source, there is a problem that the battery life is shortened.

そこで、本実施形態では、バルブケーシング１の内周面と弁座部材６の外周面との間の隙間にガスが流れないようにシールするシール部材を、外周部７１がバルブケーシング１に固定され、内周部７２が弁座部材６に固定されたゴム製のベロフラム７で構成している。これによれば、シール部材としてＯリングを用いるものに比し、弁座部材６の摺動抵抗が大幅に減少する。そのため、電動モータ５の消費電力を低減して、電池寿命をのばすことができる。 Therefore, in the present embodiment, the outer peripheral portion 71 is fixed to the valve casing 1 with a sealing member that seals the gap between the inner peripheral surface of the valve casing 1 and the outer peripheral surface of the valve seat member 6 so that gas does not flow. The inner peripheral portion 72 is composed of a rubber bellofram 7 fixed to the valve seat member 6. According to this, the sliding resistance of the valve seat member 6 is significantly reduced as compared with the one using the O-ring as the seal member. Therefore, the power consumption of the electric motor 5 can be reduced and the battery life can be extended.

また、本実施形態では、バルブケーシング１を、電磁安全弁２を囲う軸方向一方側部分１２と開閉弁３を囲う軸方向他方側部分１３との軸方向２部分に分割して、軸方向一方側部分１２と軸方向他方側部分１３との間にベロフラム７の外周部７１を挟持している。 Further, in the present embodiment, the valve casing 1 is divided into two axial parts, one axially one side portion 12 surrounding the electromagnetic safety valve 2 and the other axially side portion 13 surrounding the on-off valve 3, and one side in the axial direction. The outer peripheral portion 71 of the belofram 7 is sandwiched between the portion 12 and the other side portion 13 in the axial direction.

尚、図３に示す第２実施形態の如く、バルブケーシング１を軸方向に分割せずに、バルブケーシング１の内周面に径方向段差部１ｃを形成し、この段差部１ｃにベロフラム７の外周部７１をバネ１ｄで押し付けて、ベロフラム７の外周部７１とバルブケーシング１との間のシール性を確保することも考えられる。然し、これでは、非常に変形しやすいベロフラム７を、外周部７１以外の部分が段差部１ｃに干渉したり、外周部７１が段差部１ｃを越えたりしないようにバルブケーシング１内に慎重に挿入する必要があって、組付け作業が面倒になる。これに対し、図１、図２に示す上記第１実施形態の如く、バルブケーシング１の往動方向側部分１２と復動方向側部分１３との間にベロフラム７の外周部７１を挟持すれば、組付け作業性が向上し有利である。 As in the second embodiment shown in FIG. 3, the valve casing 1 is not divided in the axial direction, but a radial step portion 1c is formed on the inner peripheral surface of the valve casing 1, and the belfram 7 is formed on the step portion 1c. It is also conceivable to press the outer peripheral portion 71 with the spring 1d to secure the sealing property between the outer peripheral portion 71 of the bellofram 7 and the valve casing 1. However, in this case, the belofram 7, which is extremely deformable, is carefully inserted into the valve casing 1 so that a portion other than the outer peripheral portion 71 does not interfere with the step portion 1c or the outer peripheral portion 71 does not exceed the step portion 1c. It is necessary to do it, and the assembly work becomes troublesome. On the other hand, as in the first embodiment shown in FIGS. 1 and 2, if the outer peripheral portion 71 of the bellofram 7 is sandwiched between the forward movement direction side portion 12 and the reverse movement direction side portion 13 of the valve casing 1. , It is advantageous because the assembly workability is improved.

また、第１と第２の両実施形態では、ベロフラム７の径方向の撓みで弁座部材６が径方向に動くことがないように、弁座部材６の外周面の軸方向一部、例えば、復動方向側端部に、バルブケーシング１の内周面に摺接する環状突起部６４が形成されている。但し、環状突起部６４を設けるだけでは、環状突起部６４を支点にして弁座部材６が傾き、バルブケーシング１に対する弁座部材６のこじりを生ずる可能性がある。 Further, in both the first and second embodiments, a part of the outer peripheral surface of the valve seat member 6 in the axial direction, for example, so that the valve seat member 6 does not move in the radial direction due to the radial deflection of the bellofram 7. An annular protrusion 64 that is in sliding contact with the inner peripheral surface of the valve casing 1 is formed at the end on the recovery direction side. However, if only the annular protrusion 64 is provided, the valve seat member 6 may be tilted with the annular protrusion 64 as a fulcrum, and the valve seat member 6 may be twisted with respect to the valve casing 1.

そこで、第１と第２の両実施形態では、弁座部材６の環状突起部６４から離隔した部分、例えば、弁座部材６の軸方向中間部分に、バルブケーシング１の内周面に近接対向して弁座部材６が傾くことを抑制するガイド部６５を設けている。これによれば、弁座部材６が傾いて、バルブケーシング１に対する弁座部材６のこじりを生ずることを防止できる。 Therefore, in both the first and second embodiments, the portion of the valve seat member 6 separated from the annular protrusion 64, for example, the axially intermediate portion of the valve seat member 6, is close to the inner peripheral surface of the valve casing 1. A guide portion 65 is provided to prevent the valve seat member 6 from tilting. According to this, it is possible to prevent the valve seat member 6 from being tilted and causing the valve seat member 6 to be twisted with respect to the valve casing 1.

尚、ガイド部６５は、図４に示す第３実施形態の如く、弁座部材６の軸方向一方の端部に設けてもよい。また、ガイド部６５は、環状であっても、或いは、放射状に複数設けてもよい。 The guide portion 65 may be provided at one end of the valve seat member 6 in the axial direction as in the third embodiment shown in FIG. Further, the guide portions 65 may be provided in an annular shape or may be provided in a plurality of radially.

次に、図５に示す第４実施形態について説明する。第４実施形態において、ベロフラム７は、その内周部７２を弁座部材６に埋め込んだ状態で成形されるゴム製の成形品で構成されている。これによれば、ベロフラム７の内周部７２を弁座部材６に確実に密着させて、シール性を確保できる。尚、弁座部材６は、樹脂製、金属製の何れであってもよい。 Next, the fourth embodiment shown in FIG. 5 will be described. In the fourth embodiment, the bellofram 7 is made of a rubber molded product that is molded with its inner peripheral portion 72 embedded in the valve seat member 6. According to this, the inner peripheral portion 72 of the beloflam 7 can be surely brought into close contact with the valve seat member 6 to ensure the sealing property. The valve seat member 6 may be made of resin or metal.

第４実施形態では、更に、ベロフラム７の内周部７２から弁座部材６の内部を軸方向にのびて端部が開閉弁用弁座３１に露出する、ベロフラム７と一体の筒部７３が設けられている。そして、開閉弁用弁座３１に露出する筒部７３の端部により、開閉弁３の弁体３２が開閉弁用弁座３１に着座したときのシール性を確保する弁シール７３ａが構成される。これによれば、第１乃至第３実施形態の如く弁体３２に別体の弁シール３２ａを取付ける必要がなく、コストダウンを図ることができる。 In the fourth embodiment, the tubular portion 73 integrated with the bellofram 7 further extends from the inner peripheral portion 72 of the bellofram 7 to the inside of the valve seat member 6 in the axial direction and the end portion is exposed to the valve seat 31 for the on-off valve. It is provided. Then, the end portion of the tubular portion 73 exposed to the valve seat 31 for the on-off valve constitutes a valve seal 73a that ensures the sealing property when the valve body 32 of the on-off valve 3 is seated on the valve seat 31 for the on-off valve. .. According to this, it is not necessary to attach a separate valve seal 32a to the valve body 32 as in the first to third embodiments, and the cost can be reduced.

尚、第４実施形態では、弁座部材６に第１乃至第３実施形態の如きガイド部６５を設けていないが、ガイド部６５を設けても勿論よい。 In the fourth embodiment, the valve seat member 6 is not provided with the guide portion 65 as in the first to third embodiments, but of course, the guide portion 65 may be provided.

以上、本発明に実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、上記実施形態では、開閉弁３の弁体３２に、副弁体部３２２やバイパス孔３２ｂを設けているが、これら副弁体部３２２やバイパス孔３２ｂは省略してもよい。また、上記実施形態では、バルブケーシング１内に電磁安全弁２と開閉弁３とが組み込まれているが、電磁安全弁２と開閉弁３との一方を省略することも可能である。 Although the embodiments have been described above with reference to the drawings in the present invention, the present invention is not limited thereto. For example, in the above embodiment, the valve body 32 of the on-off valve 3 is provided with the sub-valve portion 322 and the bypass hole 32b, but the sub-valve portion 322 and the bypass hole 32b may be omitted. Further, in the above embodiment, the electromagnetic safety valve 2 and the on-off valve 3 are incorporated in the valve casing 1, but one of the electromagnetic safety valve 2 and the on-off valve 3 can be omitted.

１…バルブケーシング、１２…軸方向一方側部分（バルブケーシングの分割された一方の部分）、１３…軸方向他方側部分（バルブケーシングの分割された他方の部分）、２…電磁安全弁、２１…安全弁用弁座、２２…電磁安全弁の弁体、２２ａ…弁軸、２４…吸着片、２５…電磁石、３…開閉弁、３１…開閉弁用弁座、３２…開閉弁の弁体、４…操作ロッド、５…電動モータ、６…弁座部材、６１…ストッパ手段、６２…付勢手段、６４…環状突起部、６５…ガイド部、７…ベロフラム、７１…外周部、７２…内周部、７３…筒部、７３ａ…弁シール。
1 ... valve casing, 12 ... one side portion in the axial direction (one divided portion of the valve casing), 13 ... the other side portion in the axial direction (the other divided portion of the valve casing), 2 ... electromagnetic safety valve, 21 ... Safety valve valve seat, 22 ... Electromagnetic safety valve valve body, 22a ... Valve shaft, 24 ... Adsorption piece, 25 ... Electromagnet, 3 ... On-off valve, 31 ... On-off valve valve seat, 32 ... On-off valve valve body, 4 ... Operation rod, 5 ... electric motor, 6 ... valve seat member, 61 ... stopper means, 62 ... urging means, 64 ... annular protrusion, 65 ... guide part, 7 ... beloflame, 71 ... outer peripheral part, 72 ... inner peripheral part , 73 ... Cylinder, 73a ... Valve seal.

Claims (2)

内部にガスが流れる筒状のバルブケーシング内に、弁体と、前記弁体が着座可能な弁座とが設けられたガス弁装置であって、前記バルブケーシング内に、電動モータで軸方向に駆動される操作ロッドに連動して軸方向に移動する弁座部材が設けられ、前記弁座部材の軸方向端部に前記弁座が形成されると共に、前記バルブケーシングの内周面と前記弁座部材の外周面との間の隙間にガスが流れないようにシールするシール部材が設けられるものにおいて、
前記シール部材は、外周部が前記バルブケーシングに固定され、内周部が前記弁座部材に固定されたベロフラムで構成され、
前記弁座部材の外周面の軸方向一部に、前記バルブケーシングの内周面に摺接する環状突起部が形成されると共に、前記弁座部材の前記環状突起部から離隔した部分に、前記バルブケーシングの内周面に近接対向して前記弁座部材が傾くことを抑制するガイド部が設けられることを特徴とするガス弁装置。 A cylindrical valve casing through which gas inside, a valve body, a said valve body is a gas valve device comprising a valve seat is provided can be seated within the valve casing, axially by an electric motor a valve seat member to move axially in conjunction with the driven actuating rod is provided, together with the valve seat in the axial end portion of the valve seat member is formed, the inner circumferential surface of the valve casing valve In those provided with a sealing member that seals the gap between the seat member and the outer peripheral surface so that gas does not flow.
The sealing member, the outer peripheral portion is fixed to the valve casing, is constituted by bellofram the inner peripheral portion fixed to the valve seat member,
An annular protrusion that is in sliding contact with the inner peripheral surface of the valve casing is formed on a part of the outer peripheral surface of the valve seat member in the axial direction, and the valve is separated from the annular protrusion of the valve seat member. gas valve device proximate faces the inner circumferential surface of the casing, characterized in Rukoto suppress guide portion is provided to be inclined said valve seat member. 内部にガスが流れる筒状のバルブケーシング内に、電磁安全弁と開閉弁とが組み込まれたガス弁装置であって、前記バルブケーシング内に、電動モータで軸方向に駆動される操作ロッドに連動して軸方向に移動する弁座部材が設けられ、前記電磁安全弁は、前記弁座部材の軸方向一方の端部に形成した安全弁用弁座に着座可能な弁体と、前記弁体に軸方向一方にのびる弁軸を介して連結される吸着片と、前記吸着片に対向する電磁石とを備え、前記開閉弁は、前記弁座部材の軸方向他方の端部に形成した開閉弁用弁座に着座可能な、前記操作ロッドに固定の弁体を備え、前記バルブケーシング内に、前記弁座部材を軸方向他方に付勢する付勢手段と、前記弁座部材の軸方向他方への移動を前記電磁安全弁の前記弁体が前記安全弁用弁座に着座可能な所定位置で制止するストッパ手段とが設けられると共に、前記バルブケーシングの内周面と前記弁座部材の外周面との間の隙間にガスが流れないようにシールするシール部材が設けられるものにおいて、
前記シール部材は、外周部が前記バルブケーシングに固定され、内周部が前記弁座部材に固定されたベロフラムで構成され、
前記ベロフラムは、その内周部を前記弁座部材に埋め込んだ状態で成形されるゴム製の成形品で構成され、
前記ベロフラムの内周部から前記弁座部材の内部を軸方向にのびて端部が前記開閉弁用弁座に露出する、前記ベロフラムと一体の筒部が設けられ、前記筒部の前記端部により、前記開閉弁の前記弁体が前記開閉弁用弁座に着座したときのシール性を確保する開閉弁用の弁シールが構成されることを特徴とするガス弁装置。 A gas valve device in which an electromagnetic safety valve and an on-off valve are incorporated in a tubular valve casing through which gas flows, and the valve casing is interlocked with an operation rod driven axially by an electric motor. a valve seat member which moves in the axial direction is provided Te, the electromagnetic safety valve, and capable of seating the valve element on the safety valve for valve seat formed in the axial direction one end portion of the valve seat member, axial to the valve body a suction piece contrast are linked via a valve shaft extending, and a magnet that faces the suction piece, the on-off valve, the valve seat opening and closing valve for valve seat formed on the end portion in the axial direction the other member comprising a seating possible, the fixation of the valve body to the operating rod, movement within the valve casing, and biasing means for biasing the valve seat member in the other axial direction, the axial direction the other of the valve seat member wherein with a stopper means for the valve body of the electromagnetic safety valve is restrained in position can be seated on the safety valve for valve seat is provided, between the outer peripheral surface of the valve seat member and the inner peripheral surface of the valve casing In the case where a sealing member is provided to seal the gap so that gas does not flow ,
The seal member is composed of a bellofram whose outer peripheral portion is fixed to the valve casing and whose inner peripheral portion is fixed to the valve seat member.
The bellofram is composed of a rubber molded product that is molded with its inner peripheral portion embedded in the valve seat member.
End extending axially within said valve seat member is exposed to the open-close valve for valve seat from the inner periphery of the bellofram, the cylindrical portion of the bellofram integral is provided, said end portion of said tubular portion Accordingly, the gas valve and wherein the valve seal-off valve to ensure the sealing property when the valve body of the on-off valve is seated on the on-off valve for valve seat is configured.
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