JP2003232462A - Gas valve - Google Patents

Gas valve

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Publication number
JP2003232462A
JP2003232462A JP2002031882A JP2002031882A JP2003232462A JP 2003232462 A JP2003232462 A JP 2003232462A JP 2002031882 A JP2002031882 A JP 2002031882A JP 2002031882 A JP2002031882 A JP 2002031882A JP 2003232462 A JP2003232462 A JP 2003232462A
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valve
plunger
gas
needle
body
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JP2002031882A
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Japanese (ja)
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JP3789368B2 (en )
Inventor
Keiichi Mizutani
圭一 水谷
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Rinnai Corp
リンナイ株式会社
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Abstract

PROBLEM TO BE SOLVED: To enhance the durability of a motor for a motor-driven gas valve and to reduce a manufacturing cost of a gas apparatus without requiring a special closing means in integrating the gas valve into the apparatus.
SOLUTION: An internal passage 12 of a valve casing 11 is provided with a first valve seat 32 and insert-provided with a magnetic plunger 2 provided with a first valve element 21 constituting an on-off valve 3 together with the first valve seat. The internal passage downstream of the on-off valve is provided with a second valve seat 51, and a needle body 52 provided with a second valve element 52a constituting a needle valve 5 together with the second valve seat is provided corresponding to the plunger. The plunger is additionally provided with an attracting means 4 allowing selective attraction of the needle body to the plunger. A first energizing means 33 is provided for energizing the needle body toward the second valve seat when the needle body is not attracted to the plunger.
COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】本発明は、ガスコンロ等のガス器具に設けられるガスバーナーへの燃料ガスの供給を制御するガスバルブに関する。 BACKGROUND OF THE INVENTION [0001] [Technical Field of the Invention The present invention relates to a gas valve for controlling the supply of fuel gas to the gas burner is provided in the gas appliance gas stove or the like. 【0002】 【従来の技術】例えば、ガスバーナーの加熱量を自動調節して自動調理を可能とするガス器具には、弁体をモータで駆動するガスバルブが使用される。 [0002] For example, the gas appliance that enables automatic cooking by automatically adjusting the heating amount of the gas burner, gas valve to drive the valve body by a motor is used. 該ガスバルブでは、バルブケーシングの内部通路に設けた弁座に対する弁体の開度を変化させて燃料ガスのガス流量を調節する。 In the gas valve, to regulate the gas flow of the fuel gas by changing the opening degree of the valve body to the valve seat provided on the internal passage of the valve casing. 【0003】ところで、モータ駆動式のガスバルブでは、停電や器具の故障等の異常時に、燃料ガスが流れた状態に保持されるのを防止するため直ちに閉弁させる必要がある。 [0003] In the gas valve of the motor-driven, at the time of abnormality such as a failure of power failure or instrument, located in must be immediately closed to prevent is held in a state where the fuel gas flows. この場合、うず巻ばねをモータの回転軸に付設し、該ばねの付勢力で強制的にガスバルブを閉弁することが提案される。 In this case, attaching a spiral spring to a rotating shaft of the motor, it is proposed to close the forced gas valve by the urging force of the spring. 【0004】このものでは、うず巻ばねの付勢力に打ち勝って弁体を移動させる必要があるため大きな定格のモータが必要になりコスト高を招く。 [0004] In this construction leads to high cost is required motor rating greater since it is necessary to move the valve body by overcoming the biasing force of the spiral spring. また、作動時にばねの付勢力が全てモータの回転軸に加わるのでモータの耐久性が低下する。 Further, the durability of the motor is reduced because the urging force of the spring is applied to the rotation axes of all the motor during operation. 【0005】このような問題の解決策として、バルブケーシングの内部通路にモータで駆動される磁性体を設け、該磁性体に、該磁性体に付設した電磁コイルで該磁性体を励磁して弁本体を吸着し、磁性体を移動させて流量を調節することが提案されている。 [0005] As a solution for such a problem, a magnetic body which is driven by a motor inside passage of the valve casing is provided, the magnetic body, and excited magnetic body with electromagnetic coils attached to magnetic body valve adsorbing body, it is proposed that by moving the magnetic body to adjust the flow rate. (例えば、特開平成2−245588号公報)。 (E.g., JP-Heisei 2-245588 JP). そして、停電時には、磁性体と弁本体との吸着を解除し、弁本体が弁座に着座することで内部通路を閉鎖する。 At the time of power failure, to release the adsorption of the magnetic body and the valve body, the valve body closes the internal passage by the valve seat. 【0006】 【発明が解決しようとする課題】しかしながら、このものでは、弁が一重構造であるため弁本体と弁座との間にごみ等が付着するとガス漏れが生じる。 [0006] The present invention is, however, in this compound, gas leakage when the dust or the like adheres between the valve body and the valve seat for the valve is a single-layer structure is produced. このため、安全性を考慮すると、別個の閉止手段を設ける必要があり、 Therefore, considering the safety, it is necessary to provide a separate closure means,
ガス器具のコスト高を招くという問題があった。 There is a problem that increases the cost of the gas appliance. また、 Also,
閉弁位置でモータが動けなくなって停止するためモータに負荷が加わり、モータの耐久性が低下するという問題があった。 Applied load on the motor to stop is stuck motor in the closed position, the durability of the motor is lowered. 【0007】そこで、本発明は、上記点に鑑み、モータの耐久性を高めることができ、その上、ガス器具の製造コストを低くできるガスバルブを提供することに課題とする。 [0007] The present invention has been made in view of the above point, it is possible to improve the durability of the motor and, moreover, it is an object to provide a gas valve which can reduce the manufacturing cost of the gas appliance. 【0008】 【課題を解決するための手段】この課題を解決するため、本発明のガスバルブは、内部通路を備え、該内部通路に連通するガス流入口とガス流出口とを開設したバルブケーシングを有し、該内部通路に第1弁座を設け、該第1弁座と共に開閉弁を構成する第1弁体を備えた磁性プランジャを内部通路に挿設し、内部通路に沿って磁性プランジャを往復動させる駆動手段を設けたガスバルブであって、前記内部通路に第2弁座を設け、第2弁座と共にニードル弁を構成する第2弁体を備えたガス流出口へのガス量を調節するニードル本体をプランジャに対応して設け、プランジャへのニードル本体の選択的な吸着を可能とする吸着手段を該プランジャに付設すると共に、プランジャにニードル本体が吸着されていないときニードル [0008] [Means for Solving the Problems] To solve this problem, gas valve of the present invention, an internal passageway, a valve casing, which opened the gas inlet and a gas outlet port communicating with said internal passage having a first valve seat provided in the internal passage, a magnetic plunger having a first valve body that constitutes the opening and closing valve with the first valve seat and inserted into the internal passage, a magnetic plunger along the interior passageway a gas valve having a drive means for reciprocating the second valve seat provided in the internal passage, adjusting the amount of gas to the gas outlet having a second valve element constituting the needle valve with the second valve seat to provided corresponding needle body to the plunger, the suction means to allow selective adsorption of the needle body of the plunger as well as attached to the plunger, the needle when the needle body to the plunger is not adsorbed 本体を第2弁座方向に付勢する第1付勢手段を設けたことを特徴とする。 Characterized in that a first biasing means for biasing the body in the second valve seat direction. 【0009】本発明によれば、開閉弁及びニードル弁の閉弁位置で、吸着手段によってニードル本体を該プランジャに吸着させることを選択する。 According to the present invention, in the closed position of the closing valve and the needle valve, to choose to adsorb needle body to said plunger by suction means. そして、駆動手段を駆動して、ニードル本体が吸着保持されたプランジャを内部通路に沿って一方に移動させると、開閉弁及びニードル弁がそれぞれ開弁する。 Then, by driving the driving means, the needle body is moved to one along the interior passageway of the plunger, which is held by suction on-off valve and the needle valve is opened, respectively. この場合、ガス流入口を介して内部通路に燃料ガスが流入し、ガス流出口から流出する。 In this case, the fuel gas flows into the internal passage through the gas inlet, flows out from the gas outlet. そして、駆動手段を制御してプランジャを往復動させて第2弁座に対してニードル本体を変位させ、第2 Then, the plunger by controlling the drive means of the needle body is displaced relative to the second valve seat and is reciprocated, second
弁座とニードル弁との開度に応じてガス量が調節できる。 Gas amount can be adjusted in accordance with the degree of opening of the valve seat and the needle valve. 【0010】駆動手段を駆動してプランジャを他方に移動させると、開閉弁及びニードル弁がそれぞれ閉弁する。 [0010] Moving the plunger drives the driving means on the other, the opening and closing valve and the needle valve is closed, respectively. この場合、ガスバルブは二重弁構造であるため、ガス器具に設ける際に別個の閉止手段は必要でない。 In this case, the gas valve because a double valve structure, separate closure means in providing a gas appliance is not required. 【0011】また、停電や器具の故障等の異常時には、 [0011] In addition, at the time of abnormality such as a failure of a power outage and equipment,
吸着手段によるニードル本体の該プランジャへの吸着を解除することを選択する。 Choose to release the adsorption of the plunger of the needle body by suction means. この場合、ニードル本体は、 In this case, the needle body,
第1付勢手段の付勢力により第2弁座に着座する。 By the urging force of the first biasing means seated on the second valve seat. これにより、燃料ガスの供給が直ちに遮断される。 Thus, the supply of the fuel gas is cut off immediately. 【0012】ところで、開閉弁とニードル弁とが閉弁位置まで移動したとき、その閉弁位置でプランジャが移動できなくなって駆動手段の駆動を停止させたのでは駆動手段に負荷が加わり、耐久性が低下する。 By the way, when the opening and closing valve and the needle valve is moved to the closed position, than the plunger has stopped driving the drive means can no longer be moved in its closed position applied load on the drive means, the durability There is reduced. 【0013】この場合、第1弁座方向に第1弁体を付勢する第2付勢手段を設けると共に、前記駆動手段に連結され、該駆動手段が駆動を開始するとプランジャに係合する係合手段を設け、開閉弁及びニードル弁の閉弁位置までプランジャを移動させ第1及び第2の各弁座に第1 [0013] engagement that engages with this case, providing the second biasing means for biasing the first valve body in a first valve seat direction, is connected to the drive means, the plunger when the drive means starts driving the engagement means is provided, the opening and closing valve and the first to the first and second respective valve seat moves the plunger to the closed position of the needle valve
及び第2の各弁体がそれぞれ着座すると、該係合手段のプランジャとの係合を解除するようにすればよい。 And the second the valve body of seated respectively, it is sufficient to release the engagement between the plunger of the engaging means. 【0014】また、第2付勢手段を設けた場合、開閉弁の開弁時にばねの付勢力に打ち勝ってプランジャを移動させるのでは大きな定格のモータが必要になり、コスト高を招く。 Further, when providing the second biasing means, upon opening of the closing valve by overcoming the biasing force of the spring in moving the plunger requires motor rating greater, increases the cost. また、作動時にばねの付勢力が全てモータの回転軸に加わる。 Further, the biasing force of the spring is applied to the rotation axes of all the motor during operation. 【0015】このため、前記吸着手段が中空の電磁コイルであり、その内部にプランジャの一端が挿設され、開閉弁及びニードル弁の閉弁位置で、電磁コイルの内部に挿入された部分を第1弁座方向に偏在させ、電磁コイルでプランジャを吸着すると、第2付勢手段の付勢力と逆方向に吸引力が働くようにすればよい。 [0015] Therefore, the a suction means hollow electromagnetic coil, inside one end of the plunger is inserted in the closed position of the closing valve and the needle valve, the inserted portion in the interior of the electromagnetic coil the allowed to localize to the first valve seat direction, when suction plunger with electromagnetic coils, it is sufficient to attractive force biasing force opposite the direction of the second biasing means acts. 【0016】ここで、ニードル弁と開閉弁とを設けたガスバルブでは、ニードル弁より先に開閉弁が閉弁したのではガス量の調節ができない。 [0016] In the gas valve provided with a needle valve opening and closing valve, than previously-off valve is closed from the needle valve can not regulate the amount of gas. この場合、ニードル本体と第2弁体とを相互に移動自在とし、開閉弁とニードル弁とを閉弁する場合、開閉弁が閉弁する前にニードル弁が閉弁するようにすればよい。 In this case, the freely moving the needle body and the second valve body to each other, to close the on-off valve and a needle valve, it suffices to needle valve is closed before the closing valve is closed. 【0017】尚、駆動手段は、例えばモータとするのがよい。 [0017] The drive means may, for example, preferably set to the motor. 【0018】 【発明の実施の形態】図1及び図2を参照して、1は、 DETAILED DESCRIPTION OF THE INVENTION Referring to Figures 1 and 2, 1,
本発明のガスバルブである。 A gas valve of the present invention. ガスバルブ1は、中空円筒形状のバルブケーシング11を有し、内部の長手方向の孔が内部通路12を構成する。 Gas valve 1 has a valve casing 11 of hollow cylindrical shape, the interior of the longitudinal bore constitutes the internal passage 12. 該バルブケーシング11 The valve casing 11
の側面にはガス流入口13が開設され、内部通路12を介してバルブケーシング11の底面のガス流出口14に連通する。 Of the side surface is opened the gas inlet 13 communicates with the gas outlet 14 of the bottom surface of the valve casing 11 through the internal passage 12. 【0019】ガス流出口14に対向したバルブケーシングの上面には蓋材15がシール材15aを介して嵌着され、該蓋材15の上面には、回転軸Rがシール材Sを介して内部通路12に突出するようにモータMが配置されている。 [0019] upper surface of the valve casing which faces the gas outlet port 14 lid 15 is fitted via a sealing member 15a, on the upper surface of the lid member 15, the rotation axis R via the sealing material S inside motor M is disposed so as to protrude into the passage 12. 【0020】内部通路12には、モータMで内部通路1 [0020] internal passage 12, internal passage 1 by the motor M
2に沿って往復動されるプランジャ2が挿設されている。 Plunger 2 is reciprocated along two are inserted. 該プランジャ2は、円筒形状の頭部21と、内部にモータMの回転軸Rが挿入されたスカート部22とから構成される。 The plunger 2 includes a head portion 21 of cylindrical shape, composed of the rotation axis R is inserted skirt 22. motor M therein. 【0021】該頭部21には第1弁体31が取付けられ、第1弁体31は、モータMに対向してかつガス流入口13の下流側に位置して内部通路12に設けた第1弁座32と共に開閉弁3を形成する。 [0021] The head portion 21 is mounted a first valve element 31, the first valve body 31 is first provided in the internal passage 12 in opposition to the motor M and is positioned downstream of the gas inlet 13 with first valve seat 32 to form an opening and closing valve 3. 【0022】本実施の形態では、該プランジャ2は鉄などの磁性材料で形成すると共に、プランジャ2のスカート部22の周囲を囲うように中空の電磁コイル4を配設し、プランジャ2を励磁可能とした。 [0022] In this embodiment, together with the plunger 2 is formed of a magnetic material such as iron, it is disposed a hollow electromagnetic coil 4 so as to surround the periphery of the skirt portion 22 of the plunger 2, the plunger 2 excitable and the. そして、第1弁座32の下流側に第2弁座51をモータMに対向して内部通路12に設けた。 Then, it provided inside passage 12 facing the second valve seat 51 to the motor M on the downstream side of the first valve seat 32. 第2弁座51と共にニードル弁5を構成する第2弁体52aを備えたニードル本体52をプランジャ2の頭部21の下面に、該プランジャ2が励磁されている場合に選択的に吸着されるように配設した。 The lower surface of the needle body 52 of the plunger 2 the head 21 having a second valve element 52a constituting the needle valve 5 together with the second valve seat 51, the plunger 2 is selectively adsorbed when it is energized It was arranged so. 【0023】プランジャ2の励磁時に、プランジャ2に対するニードル本体52の位置がずれないように、頭部21の下面に長手方向の長孔21aを形成すると共に、 [0023] when the excitation of the plunger 2, so that the position of the needle body 52 is not displaced relative to the plunger 2, to form a longitudinal long hole 21a on the lower surface of the head 21,
ニードル本体52に長手方向に延びる脚片52bを形成し、脚片52bを長孔21aに挿入するようにした。 Forming a leg piece 52b which the needle body 52 extending in the longitudinal direction, and to insert the leg piece 52b in the long hole 21a. 【0024】また、ニードル弁5の閉弁時に、ニードル本体52の第2弁体52aに安定した閉弁荷重が加わるように第1付勢手段であるばね53を、第2弁体52a Further, when the valve is closed the needle valve 5, the spring 53 is a first biasing means so stable closed load to the second valve body 52a of the needle body 52 is applied, the second valve body 52a
と、頭部21の外周面に形成した突出部21bとの間に縮設した。 When it was mounted under compression between the projecting portion 21b formed on the outer peripheral surface of the head portion 21. 【0025】これにより、本発明のガスバルブ1は二重弁構造となるため、このガスバルブ1をガス器具に使用する際に、安全性を考慮して閉止手段を別途設けなくてもよい。 [0025] Thus, since gas valve 1 of the present invention is composed of a double valve structure, when using this gas valve 1 to the gas appliance, it is not separately provided closure means in consideration of safety. また、ガス器具使用時に停電や故障等の異常が発生した場合、電磁コイルに電流が流れないようにすれば、プランジャ2の励磁が解除され、ばね53の付勢力でニードル本体52が第2弁座51方向に移動されてニードル弁5が閉弁する。 Further, when an abnormality such as a power failure or malfunction during a gas appliance used is generated, if the current does not flow through the electromagnetic coil, the excitation of the plunger 2 is released, the needle body 52 by the urging force of the spring 53 and the second valve needle valve 5 is moved in the seat 51 direction is closed. これにより、燃料ガスの供給が遮断できる(図2参照)。 Thus, the supply of the fuel gas can be shut off (see FIG. 2). 【0026】ところで、開閉弁3及びニードル弁5の閉弁位置までプランジャ2を移動させたとき、その閉弁位置でプランジャ2が移動できなくなってモータMの駆動を停止させたのではモータMに負荷が加わり、耐久性が低下する。 By the way, when moving the on-off valve 3 and the plunger 2 to the closed position of the needle valve 5, than the plunger 2 to stop the driving of the motor M can no longer be moved in its closed position the motor M the load is applied, the durability is decreased. 【0027】本実施の形態では、モータMに螺合され、 [0027] In the present embodiment, it is screwed to the motor M,
モータMが駆動を開始するとプランジャ2に係合する係合手段であるジョイント部材6をスカート部22に内設した。 Motor M is provided inside the joint member 6 is engagement means for engaging the plunger 2 when starting the driving to the skirt 22. この場合、ジョイント部材6は中空円筒形状に形成され、その上部の内周面に設けたねじ部で回転軸Rに螺合されている。 In this case, the joint member 6 is formed in a hollow cylindrical shape, is screwed to the rotation axis R with a screw portion provided on the inner peripheral surface of the upper. また、下面の先端部62は外側に向かって屈曲されている。 The lower surface of the tip portion 62 is bent outward. 【0028】一方、スカート部22の内壁面には、先端部62と係合する環状のストッパ22aが設けられている。 On the other hand, on the inner wall surface of the skirt portion 22, an annular stopper 22a is provided to be engaged with the tip portion 62. そして、開閉弁3及びニードル弁5の閉弁位置からモータMを駆動して回転軸Rを一方に回転させると、回転軸Rに螺合したジョイント部材6が上方に移動し、ジョイント部材6の先端部62がストッパ22aに係合するとモータMの駆動力がプランジャ2に伝達され、プランジャ2が内部通路12に沿って上方に移動する。 When driving the motor M rotates the rotation axis R in one of the closed position of the on-off valve 3 and the needle valve 5, the joint member 6 is screwed to the rotation axis R is moved upward, the joint member 6 When the tip portion 62 is engaged with the stopper 22a driving force of the motor M is transmitted to the plunger 2, the plunger 2 is moved upward along the interior passageway 12. 【0029】また、開閉弁3の及びニードル弁5の閉弁時には、モータMを駆動して回転軸Rを他方に回転させると、ジョイント部材6に伴ってプランジャ2が下方に移動し、開閉弁3の第1弁体31が弁座32に着座すると、先端部62とストッパ22aとの係合が解除され、 Further, at the time of closing of the on-off valve 3 and the needle valve 5, when driving the motor M rotates the rotation axis R on the other, the plunger 2 moves downward together with the joint member 6, the on-off valve When the first valve body 31 of 3 is seated on the valve seat 32, the engagement between the tip 62 and the stopper 22a is released,
ジョイント部材6は所定距離Dだけ移動自在である。 The joint member 6 is movable by a predetermined distance D. これにより、該モータMに過剰な負荷が加わることが防止される。 Thus, the excessive load is applied to the motor M is prevented. 【0030】尚、開閉弁3の閉弁時に安定した閉弁荷重を第1弁体31に加えるため電磁コイル4と第1弁体3 [0030] Incidentally, the electromagnetic coil 4 for applying a stable closed load upon closing of the on-off valve 3 to the first valve body 31 the first valve body 3
1との間に、第1弁体31を第1弁座方向に付勢する第2付勢手段であるばね33を縮設している。 Between 1, and the spring 33 is a second urging means for urging the first valve body 31 to the first valve seat direction under compression. ここで、ばね33で第1弁体31を付勢した場合、開閉弁3及びニードル弁5の開弁時に、ばね33の付勢力に打勝ってプランジャ2を移動させるのでは大きな定格のモータを使用しなければならない。 Here, when urging the first valve body 31 by a spring 33, when opening the opening and closing valve 3 and the needle valve 5, by overcoming the biasing force of the spring 33 in moving the plunger 2 is a large rated motor It must be used. 【0031】本実施の形態では、開閉弁3及びニードル弁5の閉弁位置で中空の電磁コイル4内に位置するスカート部22の位置をガス流出口14側に偏在させ、電磁コイル4によってプランジャ2を吸着すると、ばね33 [0031] In this embodiment, the position of the on-off valve 3 and the skirt portion 22 located in the hollow of the electromagnetic coil 4 in the closed position of the needle valve 5 is unevenly distributed in the gas outlet 14 side, the plunger by the electromagnetic coil 4 When adsorbs 2, spring 33
の付勢力と逆方向に吸引力が働くようにしている。 Suction force to the biasing force in the opposite direction of is to work. 【0032】ところで、本実施の形態のようにガスバルブ1を形成した場合、ガス流出口14へのガス流量を微細な流量まで制御するには、ニードル弁5を閉弁した後で開閉弁3を閉弁する必要がある。 [0032] Incidentally, in the case of forming the gas valve 1 as in this embodiment, in order to control the gas flow into the gas outlet 14 to the fine flow, the on-off valve 3 of the needle valve 5 after closing there is a need to be closed. 【0033】本実施の形態では、ニードル本体52と第2弁体52aとを相互に移動自在となるように、ニードル本体52の外周面に設けた環状の溝部Gに第2弁体5 [0033] In this embodiment, as a movably needle body 52 and the second valve body 52a to each other, the second valve body 5 in the groove G of the annular provided on the outer peripheral surface of the needle body 52
2aを上下方向に摺動自在に装着した。 2a was slidably mounted in the vertical direction. ニードル弁5の閉弁状態では、ニードル本体52が第2弁座51の弁孔に挿入されるようになる。 In the closed state of the needle valve 5, so that the needle body 52 is inserted into the valve hole of the second valve seat 51. 【0034】次に、本発明のガスバルブ1の作動を説明する。 [0034] Next, the operation of the gas valve 1 of the present invention. 図3(a)は、開閉弁3及びニードル弁5はそれぞれ閉弁位置にある。 3 (a) is off valve 3 and the needle valve 5 is in each closed position. この状態ではガス流出口14に燃料ガスは流れない。 The fuel gas does not flow through the gas outlet 14 in this state. この状態から開閉弁3及びニードル弁5を開弁するため、電磁コイル4によりプランジャ2 For opening the on-off valve 3 and the needle valve 5 from this state, the plunger 2 by the electromagnetic coil 4
を励磁してプランジャ2にニードル本体52を吸着させる。 The is excited adsorbing needle body 52 on the plunger 2. 【0035】次いで、モータMを駆動して回転軸Rを一方に回転すると、回転軸Rに螺合したジョイント部材6 [0035] Then, when rotating the rotation axis R in one by driving the motor M, is screwed to the rotation axis R joint member 6
が上方に移動する。 But it moves upward. そして、ジョイント部材6の先端部62がストッパ22aに係合するとモータMの駆動力がプランジャ2に伝達され、プランジャ2が内部通路12 When the distal end portion 62 of the joint member 6 is engaged with the stopper 22a driving force of the motor M is transmitted to the plunger 2, the internal passage 12 plunger 2
に沿って上方に移動する。 It moves upward along. この場合、開閉弁3が先ず開弁すると共に、弁孔に挿入されたニードル本体52が上方に移動する。 In this case, the on-off valve 3 is first with opened, needle body 52 is inserted into the valve hole is moved upward. 【0036】プランジャ2の移動に伴ってニードル本体52が移動して、ニードル弁5の溝部Gの下方向の端部に第2弁体52aが当接すると、プランジャ2の移動に伴って第2弁体52aが第2弁座51から離れ、ニードル弁5が開弁される。 The needle body 52 with the movement of the plunger 2 is moved, the second valve body 52a to the end of the downward groove G of the needle valve 5 abuts, first with the movement of the plunger 2 2 the valve element 52a is spaced from the second valve seat 51, the needle valve 5 is opened. 【0037】モータMを駆動して回転軸Rをさらに一方に回転させると第2弁座51とニードル本体52との間の開度が最大となる位置まで到達する(図3(b)参照)。 The opening between the the driving motor M rotates further one rotation axis R and the second valve seat 51 needle body 52 reaches the position where the maximum (see FIG. 3 (b)) . この場合、ガス流出口14への燃料ガスのガス流量は最大となる。 In this case, the gas flow rate of the fuel gas to the gas outlet 14 is maximized. 【0038】次いで、モータMによりプランジャ2を内部通路に沿って往復動させ、第2弁座51とニードル本体52との間の開度を変化させて燃料ガスのガス流量が制御される。 [0038] Next, is reciprocated along the plunger 2 inside passage by the motor M, the gas flow rate of the fuel gas is varied opening between the second valve seat 51 and the needle body 52 is controlled. 尚、図3(c)はガス流量の最小絞り位置を示す。 Incidentally, FIG. 3 (c) shows the minimum aperture position of the gas flow. 【0039】次いで、開閉弁3及びニードル弁5を閉弁する場合、モータMを駆動して回転軸Rを他方に回転させると、ジョイント部材6に伴ってプランジャ2が下方に移動する。 [0039] Then, when closing the on-off valve 3 and the needle valve 5, when driving the motor M rotates the rotation axis R on the other, the plunger 2 is moved downward together with the joint member 6. そして、第2弁体52aが第2弁座51に着座してニードル弁5が先ず閉弁される(図3(d)参照)。 Then, the second valve body 52a is the needle valve 5 is seated is first closed to the second valve seat 51 (see FIG. 3 (d)). この場合、ガス流出口14への燃料ガスの供給は遮断される。 In this case, the supply of fuel gas to the gas outlet 14 is blocked. 【0040】回転軸Rをさらに他方に回転させると、第1弁体31が第1弁座32に着座して開閉弁3が閉弁される。 [0040] When rotating the rotation axis R In addition to the other, the first valve body 31 opening and closing valve 3 is closed seated on the first valve seat 32. その際、先端部62とストッパ22aとの係合が解除され、下方へのプランジャ2の移動が停止されるが、ジョイント部材6は所定の距離Dだけ移動する(図3(e)及び図3(a)参照)。 At that time, is disengaged from the distal end portion 62 and the stopper 22a, while movement of the plunger 2 downward is stopped, the joint member 6 is moved by a predetermined distance D (FIG. 3 (e) and 3 (a) see). 尚、プランジャ2の移動が停止するまでの間、ニードル本体52は弁孔内に挿入されつつ、溝部Gに第2弁体52aを装着した後の間隙G1分だけ下方に移動する。 The movement of the plunger 2 until the stop, the needle body 52 is being inserted into the valve hole, it moves downward through the gap G1 fraction after the second valve body 52a is attached to the groove G. 【0041】そして、開閉弁3及びニードル弁5がそれぞれ閉弁するとモータMの駆動が停止される。 [0041] Then, the driving of the motor M is stopped when the on-off valve 3 and the needle valve 5 is closed, respectively. 【0042】尚、図4に示すように、プランジャ2の位置を検出するため、ジョイント部材6の一端を、蓋材1 [0042] Incidentally, as shown in FIG. 4, for detecting the position of the plunger 2, one end of the joint member 6, lid 1
5の上方まで延ばすと共に、それに対応して位置検出手段Dを設けてもよい。 5 upward together extended to the may be provided a position detecting means D correspondingly. この場合、設定した流量に対応したジョイント部材6の位置を記憶し、火力調節信号に応じてジョイント部材がその位置に調節されるようにモータMを制御すれば、ガス流量調節が容易になる。 In this case, to store the position of the joint member 6 corresponding to the set flow rate, by controlling the motor M to the joint member in accordance with the combustion control signal is adjusted to that position, to facilitate gas flow adjustment. 【0043】その際、モータMとしてステッピングモータを使用れば、木目細かな流量調節が可能になる。 [0043] At this time, if Re using the stepping motor as the motor M, it is possible to fine-grained flow regulation. 【0044】また、図5に示すように、ガス流出口14 [0044] Further, as shown in FIG. 5, a gas outlet 14
の近傍の圧力を測定する圧力センサーPGを設けてもよい。 The pressure near the may be provided a pressure sensor PG to be measured. この場合、設定した流量に対応した圧力値を記憶し、火力調節信号に応じて圧力センサーPGの検出値と設定圧力値からモータMを制御してガス流量を調節するようにしてもよい。 In this case, it stores the pressure value corresponding to the set flow rate, the detected value and the set pressure value of the pressure sensor PG, depending on the combustion control signals to control the motor M may be to adjust the gas flow rate. 【0045】さらに、上述の発明の実施の形態では、プランジャ2のスカート部22の周囲を囲うように電磁コイル4を設けたが、図6に示すように、該電磁コイル4 [0045] Further, in the embodiment of the foregoing invention has been provided an electromagnetic coil 4 so as to surround the periphery of the skirt portion 22 of the plunger 2, as shown in FIG. 6, the electromagnetic coil 4
0をニードル弁5のニードル本体52の周囲に設けることもできる。 0 may be provided around the needle main body 52 of the needle valve 5. 【0046】この場合、停電時に、ニードル本体52がガス流出口14方向に付勢されるように、長孔21aにばねSPを縮設してもよい。 [0046] In this case, in the event of a power failure, as the needle body 52 is urged to the gas outlet 14 direction, it may be provided under compression spring SP to the long hole 21a. 【0047】 【発明の効果】以上に説明したように本発明のガスバルブでは、モータに負荷が加わり難くその耐久性を高めることができ、その上、ガス器具の製造コストを低くできるという効果を奏する。 [0047] In gas valve of the present invention as described above, according to the present invention, the load on the motor can be enhanced hard durability added, In addition, an effect that the manufacturing cost of the gas appliance can be reduced .

【図面の簡単な説明】 【図1】本発明のガスバルブの断面図【図2】本発明の停電時の状態を説明する断面図【図3】(a)乃至(e)は、本発明のガスバルブの作用を説明する図。 Sectional view illustrating a state when a power failure of a cross-sectional view of a gas valve BRIEF DESCRIPTION OF THE DRAWINGS [Figure 1] The present invention the present invention; FIG 3 (a) to (e) is of the present invention view for explaining the operation of the gas valve. 【図4】本発明のガスバルブの第1変形例を説明する断面図【図5】本発明のガスバルブの第2変形例を説明する断面図【図6】本発明のガスバルブの第3変形例を説明する断面図【符号の説明】 1 ガスバルブ11 バルブケーシング12 内部通路2プランジャ3 開閉弁31 第1弁体32 第1弁座33 ばね4 コイル5 ニードル弁51 第2弁座52 ニードル本体52a 第2弁体 A third modification of the gas valve of Figure 4] This cross-sectional view illustrating a second modification of the gas valve of a cross-sectional view the present invention; FIG explaining a first modification of the gas valve of the invention [6] The present invention description sectional view eXPLANATION oF REFERENCE nUMERALS 1 gas valve 11 valve casing 12 internal passage 2 plunger 3 off valve 31 first valve body 32 first valve seat 33 spring 4 coil 5 the needle valve 51 second valve seat 52 needle body 52a second the valve body

フロントページの続き Fターム(参考) 3H062 AA02 AA15 BB26 BB28 CC02 CC27 DD01 EE06 HH02 HH10 3H106 DA05 DA23 DB02 DB12 DB22 DB32 DC02 DC06 DC17 DD02 EE04 EE23 EE40 EE45 GA15 GA17 GB08 KK13 3K068 AA01 BB13 Front page of the continued F-term (reference) 3H062 AA02 AA15 BB26 BB28 CC02 CC27 DD01 EE06 HH02 HH10 3H106 DA05 DA23 DB02 DB12 DB22 DB32 DC02 DC06 DC17 DD02 EE04 EE23 EE40 EE45 GA15 GA17 GB08 KK13 3K068 AA01 BB13

Claims (1)

  1. 【特許請求の範囲】 【請求項1】 内部通路を備え、該内部通路に連通するガス流入口とガス流出口とを開設したバルブケーシングを有し、該内部通路に第1弁座を設け、該第1弁座と共に開閉弁を構成する第1弁体を備えた磁性プランジャを内部通路に挿設し、内部通路に沿って磁性プランジャを往復動させる駆動手段を設けたガスバルブであって、 前記内部通路に第2弁座を設け、第2弁座と共にニードル弁を構成する第2弁体を備えたガス流出口へのガス量を調節するニードル本体をプランジャに対応して設け、 Comprising a [Claims 1 internal passageway has a valve casing, which opened the gas inlet and a gas outlet port communicating with said internal passage, a first valve seat provided in the internal passage, magnetic plunger having a first valve body that constitutes the opening and closing valve with the first valve seat and inserted into the internal passage, a gas valve having a drive means for reciprocating the magnetic plunger along the interior passageway, the a second valve seat provided in the internal passage, provided a needle body for adjusting the amount of gas to the gas outlet having a second valve element constituting the needle valve with the second valve seat in response to the plunger,
    プランジャへのニードル本体の選択的な吸着を可能とする吸着手段を該プランジャに付設すると共に、プランジャにニードル本体が吸着されていないときニードル本体を第2弁座方向に付勢する第1付勢手段を設けたことを特徴とするガスバルブ。 The suction means for enabling the needle body of selective adsorption of the plunger as well as attached to the plunger, the first urging needle body plunger to urge the needle body in the second valve seat direction when not being adsorbed gas valve, characterized in that a means. 【請求項2】 第1弁座方向に第1弁体を付勢する第2 2. A second for biasing the first valve body in a first valve seat direction
    付勢手段を設けると共に、前記駆動手段に連結され、該駆動手段が駆動を開始するとプランジャに係合する係合手段を設け、開閉弁及びニードル弁の閉弁位置までプランジャを移動させ第1及び第2の各弁座に第1及び第2 Provided with a biasing means, coupled to said driving means, when said driving means starts driving provided engaging means for engaging the plunger, the first and move the plunger to the closed position of the closing valve and the needle valve the second the valve seat 1 and the second
    の各弁体がそれぞれ着座すると、該係合手段のプランジャとの係合を解除するようにしたことを特徴とする請求項1記載のガスバルブ。 When each valve body is seated, respectively, gas valve according to claim 1, characterized in that so as to release the engagement between the plunger of the engaging means. 【請求項3】 前記吸着手段が中空の電磁コイルであり、その内部にプランジャの一端が挿設され、開閉弁及びニードル弁の閉弁位置で電磁コイルの内部に挿入された部分を第1弁座方向に偏在させ、電磁コイルでプランジャを吸着すると、第2付勢手段の付勢力と逆方向に吸引力が働くようにしたことを特徴とする請求項2記載のガスバルブ。 3. an electromagnetic coil of said suction means is hollow, its interior one end of the plunger is inserted, the inside inserted portion of the electromagnetic coil in the closed position of the closing valve and the needle valve the first valve allowed to localize in the seat direction, when the suction plunger with electromagnetic coil, a gas valve according to claim 2, characterized in that as the suction force in the biasing force opposite the direction of the second biasing means acts. 【請求項4】 ニードル本体と第2弁体とを相互に移動自在とし、開閉弁とニードル弁とを閉弁する場合、開閉弁が閉弁する前にニードル弁が閉弁するようにしたことを特徴とする請求項1乃至請求項3のいずれか1項に記載のガスバルブ。 4. A movable with the needle body and the second valve body to each other, to close the on-off valve and a needle valve, the opening and closing valve is so the needle valve is closed before the closing gas valve according to any one of claims 1 to 3, characterized in. 【請求項5】 前記駆動手段はモータであることを特徴することを特徴とする請求項1乃至請求項4のいずれか1項に記載のガスバルブ。 5. A gas valve according to any one of claims 1 to 4, characterized in that characterized in that said driving means is a motor.
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JP2005048922A (en) * 2003-07-31 2005-02-24 Miura Co Ltd valve
JP2006336793A (en) * 2005-06-03 2006-12-14 Rinnai Corp Motor safety valve
JP2007139040A (en) * 2005-11-17 2007-06-07 Matsushita Electric Ind Co Ltd Cut-off valve
KR100812803B1 (en) 2006-04-03 2008-03-12 린나이가부시기가이샤 Method for controlling safety valve of motors
KR100813112B1 (en) 2006-04-25 2008-03-13 주식회사 맥코이 Flow path opening and closing apparatus using a permanent magnet
JP2009228785A (en) * 2008-03-22 2009-10-08 Rinnai Corp Motor safety valve
JP2010127337A (en) * 2008-11-26 2010-06-10 Rinnai Corp Motor safety valve
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WO2013127276A1 (en) * 2012-02-28 2013-09-06 艾默生环境优化技术(苏州)有限公司 Electronic expansion valve
CN103291999A (en) * 2012-02-28 2013-09-11 艾默生环境优化技术(苏州)有限公司 Electronic expansion valve
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JP2005048922A (en) * 2003-07-31 2005-02-24 Miura Co Ltd valve
JP2006336793A (en) * 2005-06-03 2006-12-14 Rinnai Corp Motor safety valve
JP2007139040A (en) * 2005-11-17 2007-06-07 Matsushita Electric Ind Co Ltd Cut-off valve
KR100812803B1 (en) 2006-04-03 2008-03-12 린나이가부시기가이샤 Method for controlling safety valve of motors
KR100813112B1 (en) 2006-04-25 2008-03-13 주식회사 맥코이 Flow path opening and closing apparatus using a permanent magnet
JP2009228785A (en) * 2008-03-22 2009-10-08 Rinnai Corp Motor safety valve
JP2010127337A (en) * 2008-11-26 2010-06-10 Rinnai Corp Motor safety valve
JP2012092918A (en) * 2010-10-28 2012-05-17 Fuji Koki Corp Flow control valve, and method of controlling the same
CN102954273B (en) * 2011-08-09 2016-11-02 株式会社三国 Off valve
CN102954273A (en) * 2011-08-09 2013-03-06 株式会社三国 Opening and closing valve
JP2013124673A (en) * 2011-12-13 2013-06-24 Shimadzu Corp Flow rate control mechanism and gas chromatograph equipped with the same
WO2013127276A1 (en) * 2012-02-28 2013-09-06 艾默生环境优化技术(苏州)有限公司 Electronic expansion valve
CN103291999A (en) * 2012-02-28 2013-09-11 艾默生环境优化技术(苏州)有限公司 Electronic expansion valve
EP2821682A4 (en) * 2012-02-28 2015-11-04 Emerson Climate Tech Suzhou Co Electronic expansion valve
US9435451B2 (en) 2012-02-28 2016-09-06 Emerson Climate Technologies (Suzhou) Co., Ltd. Electronic expansion valve
CN103775717A (en) * 2012-10-22 2014-05-07 艾默生环境优化技术(苏州)有限公司 Electronic expansion valve
US9739755B2 (en) 2014-05-27 2017-08-22 Shimadzu Corporation Flow rate control mechanism and gas chromatograph including flow rate control mechanism

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