JP2019007615A - Pilot type solenoid valve - Google Patents

Pilot type solenoid valve Download PDF

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Publication number
JP2019007615A
JP2019007615A JP2018061945A JP2018061945A JP2019007615A JP 2019007615 A JP2019007615 A JP 2019007615A JP 2018061945 A JP2018061945 A JP 2018061945A JP 2018061945 A JP2018061945 A JP 2018061945A JP 2019007615 A JP2019007615 A JP 2019007615A
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Prior art keywords
valve
secondary side
flow path
sub
diameter
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JP7090449B2 (en
Inventor
直揮 堂本
Naoki Domoto
直揮 堂本
真也 坂田
Shinya Sakata
真也 坂田
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Lixil Corp
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Lixil Corp
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Priority to DE112018003276.0T priority Critical patent/DE112018003276T5/en
Priority to PCT/JP2018/023230 priority patent/WO2019004000A1/en
Priority to US16/626,318 priority patent/US11306844B2/en
Priority to CN201880042353.4A priority patent/CN110785598B/en
Publication of JP2019007615A publication Critical patent/JP2019007615A/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
    • 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
    • F16K31/0655—Lift valves
    • 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
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
    • F16K31/402—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a diaphragm
    • F16K31/404—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a diaphragm the discharge being effected through the diaphragm and being blockable by an electrically-actuated member making contact with the diaphragm
    • 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
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
    • 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
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
    • F16K31/406—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a piston
    • 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
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/42—Actuating devices; Operating means; Releasing devices actuated by fluid by means of electrically-actuated members in the supply or discharge conduits of the fluid motor

Abstract

To provide a pilot type solenoid valve that can make a stroke of a plunger be a minimum requirement, miniaturize and save power of a solenoid valve.SOLUTION: A pilot type solenoid valve 1 includes: a diaphragm part; a primary side part; a secondary side part; a main valve 60; a back-pressure chamber; a primary side auxiliary flow passage; a secondary side auxiliary flow passage; an auxiliary valve; and an auxiliary valve drive part. The secondary side auxiliary flow passage 113 is not formed in the main valve 60 but formed around the main valve 60 so as to detour the main valve 60.SELECTED DRAWING: Figure 2

Description

本発明は、パイロット式電磁弁に関する。   The present invention relates to a pilot type solenoid valve.

従来より、液体の流れを制御するために、液体の流路に電磁弁が設けられ、電磁弁の開閉が制御されることが知られている。電磁弁としては、いわゆるパイロット式電磁弁が知られている。パイロット式電磁弁は、例えば、ダイアフラムを備え、ダイアフラム部の上端に副流路の端部の開口が形成され、この開口がプランジャーによって開閉が行なわれることにより、ダイアフラムによる主流路の開閉が行われる（例えば、特許文献１参照）。   Conventionally, in order to control the flow of a liquid, it is known that an electromagnetic valve is provided in a flow path of the liquid and the opening and closing of the electromagnetic valve is controlled. As a solenoid valve, a so-called pilot solenoid valve is known. For example, the pilot-type solenoid valve includes a diaphragm, and an opening at the end of the sub-flow path is formed at the upper end of the diaphragm portion, and the opening and closing of the opening is performed by a plunger, thereby opening and closing the main flow path by the diaphragm. (See, for example, Patent Document 1).

特許第５４５３１７５号公報Japanese Patent No. 5453175

しかし、前述した従来のパイロット式電磁弁では、ダイアフラム部による主流路の開閉のストローク以上に、プランジャーのストロークを大きくする必要があり、このため、大きな電磁力を必要とするため、電磁弁の小型化や省電力化を期待できない。   However, in the conventional pilot type solenoid valve described above, it is necessary to make the plunger stroke larger than the opening / closing stroke of the main flow path by the diaphragm portion. Therefore, a large electromagnetic force is required. Cannot expect miniaturization and power saving.

本発明は、プランジャーのストロークを必要最小限とすることが可能であり、電磁弁の小型化や省電力化を図ることが可能なパイロット式電磁弁を提供すること目的とする。   An object of the present invention is to provide a pilot-type solenoid valve capable of minimizing the stroke of the plunger and miniaturizing the solenoid valve and saving power.

上記目的を達成するため本発明は、ダイアフラム部（例えば、後述の主弁６０、背圧室３１）と、前記ダイアフラム部に向って液体が流入する一次側部（例えば、後述の一次側流路１１１、一次側空間１０３）と、前記ダイアフラム部からの液体が流出する二次側部（例えば、後述の二次側流路１１２、二次側空間１０４）と、前記ダイアフラム部を構成し、一次側部と二次側部との遮断と連通との切替えをする主弁（例えば、後述の主弁６０）と、前記主弁における前記一次側部と前記二次側部とが連通する側に対する背面側に形成された背圧室（例えば、後述の背圧室３１）と、前記主弁に形成され、前記一次側部から前記背圧室に前記液体を流通させることにより、前記背圧室内の圧力を上昇させる一次側副流路（例えば、後述の小孔６１５）と、前記背圧室から前記液体を前記二次側部に流通させる二次側副流路（例えば、後述の貫通孔４６１２、バルブカバー連通孔３０５、隙間１１３、及び、バルブベース径方向貫通流路１０６１）と、前記背圧室と前記二次側副流路との遮断と連通との切替えをする副弁（例えば、後述のプランジャー４５）と、前記副弁による前記切替えをするために前記副弁を駆動する副弁駆動部（例えば、後述のコア４２、コイル４３、磁石４４）と、を備え、前記二次側副流路は、前記主弁を迂回するように形成されているパイロット式電磁弁を提供する。   In order to achieve the above object, the present invention provides a diaphragm portion (for example, a main valve 60 and a back pressure chamber 31 described later) and a primary side portion (for example, a primary-side flow channel described later) through which liquid flows toward the diaphragm portion. 111, a primary side space 103), a secondary side part from which the liquid from the diaphragm part flows out (for example, a secondary side flow path 112 and a secondary side space 104 described later), and the diaphragm part. A main valve (for example, a main valve 60 described later) that switches between blocking and communication between the side portion and the secondary side portion, and a side where the primary side portion and the secondary side portion of the main valve communicate with each other A back pressure chamber (for example, a back pressure chamber 31 to be described later) formed on the back side and the main valve are formed in the main valve, and the liquid is circulated from the primary side portion to the back pressure chamber. Primary side sub-channel (for example, a small hole to be described later) 15), and a secondary side sub-channel (for example, a through hole 4612, a valve cover communication hole 305, a gap 113, and a valve base radial direction described later) for allowing the liquid to flow from the back pressure chamber to the secondary side portion. A through valve 1061), a sub valve (for example, a plunger 45 to be described later) for switching between blocking and communicating between the back pressure chamber and the secondary side sub channel, and the switching by the sub valve. For this purpose, a secondary valve drive section (for example, a core 42, a coil 43, and a magnet 44 described later) for driving the secondary valve is provided, and the secondary side secondary flow path is formed to bypass the main valve. A pilot operated solenoid valve is provided.

また、前記主弁を収容する本体部（例えば、後述のバルブベース１０、バルブカバー３０）を備え、前記本体部においては、前記本体部の外面と、前記本体部が固定される被固定部材との間に形成されることが好ましい。また前記一次側部に流入する流路（例えば、後述の管部材一次側流路９０８）と前記二次側部から排出する流路（例えば、後述の管部材二次側流路９０９）とを備えている前記被固定部材に固定可能に形成されることが好ましい。また、前記二次側副流路の上流側の端部には、前記副弁が当接する弁座（例えば、後述のシート部４６１１）が設けられ、前記弁座よりも前記二次側副流路の下流側の部分は、徐々に拡径する拡径部（例えば、後述の拡径部４６１３）を有していることが好ましい。   In addition, a main body (e.g., a valve base 10 and a valve cover 30 described later) that accommodates the main valve is provided, and in the main body, an outer surface of the main body and a fixed member to which the main body is fixed. It is preferable to be formed between. Further, a flow path (for example, a tube member primary flow path 908 described later) flowing into the primary side portion and a flow path (for example, a tube member secondary flow path 909 described later) discharged from the secondary side section are provided. It is preferable that the fixing member is provided so as to be fixable. Further, a valve seat (for example, a seat portion 4611 described later) with which the sub valve abuts is provided at an upstream end portion of the secondary side sub flow path, and the secondary side substream is more than the valve seat. The portion on the downstream side of the path preferably has a diameter-expanded portion that gradually increases in diameter (for example, a diameter-expanded portion 4613 described later).

また、前記二次側副流路の上流側の端部には、前記副弁が当接する弁座が設けられ、前記二次側副流路の上流側の端部の開口を形成し前記副弁が当接する前記弁座の開口周縁部は、前記二次側副流路の上流側から下流側に向かって縮径している縮径部（例えば、後述の縮径部４６１６）を有していることが好ましい。また、前記二次側副流路の上流側の端部には、前記副弁が当接する弁座が設けられ、前記弁座よりも前記二次側副流路の下流側の部分は、拡径する拡径部を有し、前記二次側副流路の上流側の端部には、前記副弁が当接する弁座が設けられ、前記二次側副流路の上流側の端部の開口を形成し前記副弁が当接する前記弁座の開口周縁部は、前記二次側副流路の上流側から下流側に向かって縮径している縮径部を有し、前記二次側副流路における前記縮径部の上流端の直径よりも前記拡径部により拡径された大径部の直径の方が大きいことが好ましい。また、前記主弁と前記副弁とは、同軸上に配置されていることが好ましい。   In addition, a valve seat with which the secondary valve abuts is provided at the upstream end of the secondary side secondary flow path, and an opening at the upstream end of the secondary side secondary flow path is formed to form the secondary side secondary flow path. An opening peripheral portion of the valve seat with which the valve abuts has a reduced diameter portion (for example, a reduced diameter portion 4616 described later) that is reduced in diameter from the upstream side to the downstream side of the secondary side sub-flow channel. It is preferable. Further, a valve seat with which the sub valve abuts is provided at an upstream end portion of the secondary side sub flow path, and a downstream portion of the secondary side sub flow path from the valve seat is expanded. A diameter-enlarged portion is provided, and an upstream end portion of the secondary side sub-channel is provided with a valve seat that contacts the sub-valve at an upstream end portion of the secondary-side sub-channel. An opening peripheral portion of the valve seat that contacts the secondary valve has a reduced diameter portion that is reduced in diameter from the upstream side to the downstream side of the secondary side auxiliary flow path, It is preferable that the diameter of the large diameter portion expanded by the enlarged diameter portion is larger than the diameter of the upstream end of the reduced diameter portion in the secondary side sub-flow channel. Moreover, it is preferable that the said main valve and the said subvalve are arrange | positioned coaxially.

また、前記主弁を収容する本体部と、前記副弁が当接する弁座と、を備え、前記本体部は、前記本体部の径方向に貫通する連通孔を有し、前記副弁駆動部は、前記副弁を駆動させるコイルを有するコイル部を有し、前記コイル部は、前記弁座を有することが好ましい。   A main body housing the main valve; and a valve seat against which the sub valve abuts, wherein the main body includes a communication hole penetrating in a radial direction of the main body, and the sub valve driving unit It has a coil part which has a coil which drives the subvalve, and it is preferred that the coil part has the valve seat.

また、前記主弁は、主弁座部に当接して前記一次側部と前記二次側部とを遮断するダイアフラムと、前記ダイアフラムに固定され前記一次側部と前記背圧室とを連通するダイアフラム板とを備え、前記二次側部への前記二次側副流路の開口は、前記二次側部の前記液体の流れにおける前記ダイアフラム板の下流側の端部よりも上流側に位置していることが好ましい。   The main valve is in contact with the main valve seat portion and blocks the primary side portion and the secondary side portion, and is fixed to the diaphragm and communicates the primary side portion and the back pressure chamber. An opening of the secondary side sub-channel to the secondary side portion is located upstream of the downstream end portion of the diaphragm plate in the liquid flow of the secondary side portion. It is preferable.

本発明によれば、プランジャーのストロークを必要最小限とすることが可能であり、電磁弁の小型化や省電力化を図ることが可能なパイロット式電磁弁を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the stroke of a plunger can be made into the minimum required, and the pilot type solenoid valve which can aim at size reduction and power saving of a solenoid valve can be provided.

本発明の一実施形態に係るパイロット式電磁弁１を示す斜視図である。1 is a perspective view showing a pilot solenoid valve 1 according to an embodiment of the present invention. 本発明の一実施形態に係るパイロット式電磁弁１が管部材９に取り付けられた状態を示す断面図である。1 is a cross-sectional view showing a state in which a pilot solenoid valve 1 according to an embodiment of the present invention is attached to a pipe member 9. FIG. 本発明の一実施形態に係るパイロット式電磁弁１を示す断面図である。It is sectional drawing which shows the pilot type solenoid valve 1 which concerns on one Embodiment of this invention. 本発明の一実施形態に係るパイロット式電磁弁１を示す分解斜視図である。It is a disassembled perspective view which shows the pilot type solenoid valve 1 which concerns on one Embodiment of this invention. 本発明の一実施形態に係るパイロット式電磁弁１において、一次側流路１１１から一次側空間１０３へ水が流入する様子を示す説明図である。In pilot type solenoid valve 1 concerning one embodiment of the present invention, it is an explanatory view showing signs that water flows into primary side space 103 from primary side channel 111. 本発明の一実施形態に係るパイロット式電磁弁１において、背圧室３１に流入した水が第二副流路へ流入する様子を示す説明図である。In the pilot type solenoid valve 1 which concerns on one Embodiment of this invention, it is explanatory drawing which shows a mode that the water which flowed into the back pressure chamber 31 flows in into a 2nd subchannel. 本発明の一実施形態に係るパイロット式電磁弁１において、第二副流路を水が流通する様子を示す説明図である。It is explanatory drawing which shows a mode that water distribute | circulates a 2nd subchannel in the pilot type solenoid valve 1 which concerns on one Embodiment of this invention. 本発明の一実施形態に係るパイロット式電磁弁１において、第二副流路から二次側空間１０４へ水が流通する様子を示す説明図である。It is explanatory drawing which shows a mode that water distribute | circulates from the 2nd subflow path to the secondary side space 104 in the pilot type solenoid valve 1 which concerns on one Embodiment of this invention. 本発明の一実施形態に係るパイロット式電磁弁１のシート部４６１１を示す拡大断面図である。It is an expanded sectional view showing seat part 4611 of pilot type solenoid valve 1 concerning one embodiment of the present invention. 本発明の一実施形態に係るパイロット式電磁弁１のシート部４６１１を成形する金型の一部を示す拡大断面図である。It is an expanded sectional view showing a part of metallic mold which molds seat part 4611 of pilot type solenoid valve 1 concerning one embodiment of the present invention.

以下、本発明のパイロット式電磁弁１の好ましい一実施形態である第１実施形態について、図１〜図４を参照しながら説明する。図１は、本発明の一実施形態に係るパイロット式電磁弁１を示す斜視図である。図２は、本発明の一実施形態に係るパイロット式電磁弁１が管部材９に取り付けられた状態を示す断面図である。図３は、本発明の一実施形態に係るパイロット式電磁弁１を示す断面図である。図４は、本発明の一実施形態に係るパイロット式電磁弁１を示す分解斜視図である。   Hereinafter, a first embodiment, which is a preferred embodiment of a pilot solenoid valve 1 according to the present invention, will be described with reference to FIGS. FIG. 1 is a perspective view showing a pilot solenoid valve 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state where the pilot solenoid valve 1 according to the embodiment of the present invention is attached to the pipe member 9. FIG. 3 is a cross-sectional view showing a pilot solenoid valve 1 according to an embodiment of the present invention. FIG. 4 is an exploded perspective view showing a pilot type electromagnetic valve 1 according to an embodiment of the present invention.

本実施形態のパイロット式電磁弁１は、図１に示すように、バルブベース１０と、バルブカバー３０と、コイル部４０とを備えており、これらは下から上へ向ってこの順で接続されてカートリッジタイプの構成とされている。即ち、パイロット式電磁弁１は、図２に示すように、管部材９の開口部９０１に、バルブベース１０及びバルブカバー３０が挿入されて、管部材９に対して固定されて用いられる。管部材９へのパイロット式電磁弁１の固定の詳細については、後述する。   As shown in FIG. 1, the pilot solenoid valve 1 of the present embodiment includes a valve base 10, a valve cover 30, and a coil portion 40, which are connected in this order from bottom to top. The cartridge type configuration. That is, as shown in FIG. 2, the pilot solenoid valve 1 is used by being fixed to the pipe member 9 by inserting the valve base 10 and the valve cover 30 into the opening 901 of the pipe member 9. Details of fixing the pilot type electromagnetic valve 1 to the pipe member 9 will be described later.

バルブベース１０及びバルブカバー３０は、本体部を構成する。図３に示すように、バルブベース１０は、内部が中空の円筒形状を有する内側筒部１０１と、内側筒部１０１の上部を取囲むように設けられた外側筒部１０２とを有している。内側筒部１０１の外部の空間（内側筒部１０１と外側筒部１０２との間の空間）は、後述の主弁６０に向って液体が流通する一次側流路１１１に連通する一次側空間１０３を構成する。一次側流路１１１、一次側空間１０３は、一次側部を構成する。内側筒部１０１の内部の空間は、後述の主弁６０からの液体が流通する二次側流路１１２に連通する二次側空間１０４を構成する。二次側流路１１２、二次側空間１０４は、二次側部を構成する。内側筒部１０１は、一次側空間１０３と二次側空間１０４と間に形成された隔壁を構成する。内側筒部１０１の上端部は、内側筒部１０１の上端に近づくにつれて内側筒部１０１の径方向における厚みが徐々に薄くなっており、その上端においてダイアフラム６３が当接する主弁座部１０１１を構成する。   The valve base 10 and the valve cover 30 constitute a main body. As shown in FIG. 3, the valve base 10 has an inner cylinder portion 101 having a hollow cylindrical shape inside, and an outer cylinder portion 102 provided so as to surround the upper portion of the inner cylinder portion 101. . A space outside the inner cylinder part 101 (a space between the inner cylinder part 101 and the outer cylinder part 102) is a primary side space 103 that communicates with a primary channel 111 through which liquid flows toward a main valve 60 described later. Configure. The primary side flow path 111 and the primary side space 103 constitute a primary side part. The space inside the inner cylinder portion 101 constitutes a secondary side space 104 that communicates with a secondary side flow path 112 through which liquid from a main valve 60 described later flows. The secondary side flow path 112 and the secondary side space 104 constitute a secondary side part. The inner cylinder portion 101 constitutes a partition formed between the primary side space 103 and the secondary side space 104. The upper end portion of the inner cylindrical portion 101 gradually decreases in thickness in the radial direction of the inner cylindrical portion 101 as it approaches the upper end of the inner cylindrical portion 101, and constitutes the main valve seat portion 1011 with which the diaphragm 63 abuts at the upper end. To do.

バルブベース１０の下部の下端部と、バルブベース１０の上部の下端部とには、それぞれＯリング１０５１、１０５２が設けられている。Ｏリング１０５１、１０５２は、内側筒部１０１の下部の下端部、外側筒部１０２の上部の下端部に対して、それぞれ一周するように装着されている。Ｏリング１０５１は、一次側流路１１１と二次側流路１１２との間の止水を行う。Ｏリング１０５２は、一次側流路１１１と隙間１１３等により構成される二次側副流路との間の止水を行う。一次側流路１１１と一次側空間１０３との間には、ストレーナ１０５３が設けられている。ストレーナ１０５３は、図３に示すように、上方向へ湾曲しており、接続部１０６に対して所定の位置に位置が決められて配置されている。また、内側筒部１０１の上部と外側筒部１０２とは、接続部１０６により接続されている。内側筒部１０１の内部空間と、外側筒部１０２の外部空間とは、接続部１０６の内部を貫通するとともに、内側筒部１０１及び外側筒部１０２を貫通するバルブベース径方向貫通流路１０６１（図８参照）により連通している。接続部１０６は、内側筒部１０１の直径位置に一対設けられており、このため、バルブベース径方向貫通流路１０６１も内側筒部１０１の直径位置に一対形成されている。バルブベース１０の上端部には、上方へ突出し中央に貫通孔が形成された一対のフック係止部１０７（図１参照）が、バルブベース１０の直径位置に設けられている。また、バルブベース１０の上端面には、図３等に示すように、主弁６０が設けられている。   O-rings 1051 and 1052 are respectively provided at the lower end of the lower portion of the valve base 10 and the lower end of the upper portion of the valve base 10. The O-rings 1051 and 1052 are attached to the lower end portion of the lower portion of the inner cylindrical portion 101 and the lower end portion of the upper portion of the outer cylindrical portion 102 so as to make a round. The O-ring 1051 stops water between the primary side flow path 111 and the secondary side flow path 112. The O-ring 1052 stops water between the primary side flow path 111 and the secondary side sub flow path constituted by the gap 113 and the like. A strainer 1053 is provided between the primary side flow path 111 and the primary side space 103. As shown in FIG. 3, the strainer 1053 is curved upward, and is disposed at a predetermined position with respect to the connecting portion 106. The upper part of the inner cylinder part 101 and the outer cylinder part 102 are connected by a connection part 106. The internal space of the inner cylinder part 101 and the outer space of the outer cylinder part 102 penetrate the inside of the connection part 106 and also pass through the inner cylinder part 101 and the outer cylinder part 102 in the valve base radial direction through flow path 1061 ( (See FIG. 8). A pair of connection portions 106 are provided at the diameter position of the inner cylinder portion 101, and therefore, a pair of valve base radial direction through flow passages 1061 are also formed at the diameter position of the inner cylinder portion 101. At the upper end of the valve base 10, a pair of hook locking portions 107 (see FIG. 1) protruding upward and having a through hole formed in the center are provided at a diameter position of the valve base 10. A main valve 60 is provided on the upper end surface of the valve base 10 as shown in FIG.

主弁６０は、ダイアフラム板６１とダイアフラム６３とを備えている。ダイアフラム板６１は、樹脂材料が成形されて構成されており、上に向って拡径するダイアフラム板下部６１１と、ダイアフラム板下部６１１の上端よりも大径のダイアフラム板上部６１２と、ダイアフラム板上部６１２とダイアフラム板下部６１１とを接続する括れたダイアフラム板中間部６１３と、を有している。ダイアフラム板下部６１１からダイアフラム板中間部６１３にかけての部分には、これらの軸心位置に円柱形状の穴６１４が形成されている。穴６１４は、ダイアフラム板下部６１１の中央から上方向に、ダイアフラム板中間部６１３の部分に至るまで延びている。   The main valve 60 includes a diaphragm plate 61 and a diaphragm 63. The diaphragm plate 61 is formed by molding a resin material, and has a diaphragm plate lower portion 611 whose diameter increases upward, a diaphragm plate upper portion 612 having a diameter larger than the upper end of the diaphragm plate lower portion 611, and a diaphragm plate upper portion 612. And a diaphragm plate intermediate portion 613 for connecting the diaphragm plate lower portion 611 to each other. In a portion from the diaphragm plate lower part 611 to the diaphragm plate intermediate part 613, a cylindrical hole 614 is formed at the axial center position. The hole 614 extends upward from the center of the diaphragm plate lower part 611 to reach the diaphragm plate intermediate part 613.

ダイアフラム板上部６１２には、一次側副流路を構成する小孔６１５が形成されている。小孔６１５は、ダイアフラム板上部６１２を上下方向へ貫通するように形成されており、一次側空間１０３と後述の背圧室３１とを連通する。小孔６１５を通して水が一次側空間１０３から背圧室３１に流入することにより、背圧室３１内の圧力を上昇させる。   The diaphragm plate upper part 612 is formed with a small hole 615 constituting the primary side sub-flow channel. The small hole 615 is formed so as to penetrate the diaphragm plate upper part 612 in the vertical direction, and communicates the primary side space 103 and the back pressure chamber 31 described later. When water flows into the back pressure chamber 31 from the primary side space 103 through the small hole 615, the pressure in the back pressure chamber 31 is increased.

また、ダイアフラム板上部６１２の上端面には、ばね係合凹部６１２１が形成されている。ばね係合凹部６１２１には、ばね６４の下端部が当接して係合している。ばね６４の上端部は、背圧室３１の天井を形成するバルブカバー３０の下端面に当接している。ばね６４は、圧縮ばねにより構成されており、主弁６０を下方へ押圧し、ダイアフラム６３を内側筒部１０１の上端部の主弁座部１０１１に当接させる。ばね６４の上端部においてばね６４の先端の部分は水平方向へ延びて、更に下方向へ直線的に延びて、クリーニングピン６４１を構成する。クリーニングピン６４１は、小孔６１５を貫通しており、小孔６１５内において目詰まりが発生することを防止する。小孔６１５の内周面とクリーニングピン６４１の外周面との間には、水が流通可能な隙間が形成されており、この隙間が一次側副流路を構成する。   A spring engaging recess 6121 is formed on the upper end surface of the diaphragm plate upper part 612. The lower end portion of the spring 64 is in contact with and engaged with the spring engaging recess 6121. The upper end portion of the spring 64 is in contact with the lower end surface of the valve cover 30 that forms the ceiling of the back pressure chamber 31. The spring 64 is configured by a compression spring, presses the main valve 60 downward, and causes the diaphragm 63 to abut the main valve seat portion 1011 at the upper end portion of the inner cylinder portion 101. At the upper end of the spring 64, the tip portion of the spring 64 extends in the horizontal direction and further extends linearly in the downward direction to constitute the cleaning pin 641. The cleaning pin 641 passes through the small hole 615 and prevents clogging in the small hole 615. A gap through which water can flow is formed between the inner circumferential surface of the small hole 615 and the outer circumferential surface of the cleaning pin 641, and this gap forms a primary side sub-flow channel.

ダイアフラム６３は、ゴム材料によって形成されて円形状を有している。ダイアフラム６３の周縁部は、バルブベース１０の上端部の周縁部とバルブカバー３０の下端部の周縁部とによって挟まれることにより、これらに対して固定され、これにより、主弁６０は、バルブベース１０及びバルブカバー３０により構成される本体部により収容されている。ダイアフラム６３の中心寄りの部分は、図３等に示すように、下へ窪んだ円形状を有しており、ダイアフラム６３の中心には、貫通孔６３１が形成されている。貫通孔６３１には、ダイアフラム板６１のダイアフラム板中間部６１３が貫通している。このように下へ窪んだダイアフラム６３の円形状の部分によって、ダイアフラム板６１は支持されている。   The diaphragm 63 is formed of a rubber material and has a circular shape. The peripheral portion of the diaphragm 63 is fixed to the peripheral portion of the upper end portion of the valve base 10 and the peripheral portion of the lower end portion of the valve cover 30, whereby the main valve 60 is fixed to the valve base. 10 and the valve cover 30. As shown in FIG. 3 and the like, the portion near the center of the diaphragm 63 has a circular shape that is depressed downward, and a through-hole 631 is formed at the center of the diaphragm 63. The diaphragm plate intermediate portion 613 of the diaphragm plate 61 passes through the through hole 631. Thus, the diaphragm plate 61 is supported by the circular portion of the diaphragm 63 that is recessed downward.

この構成により、ダイアフラム板６１は、ダイアフラム６３によって上下方向へ移動可能に支持されている。ダイアフラム板６１が、ダイアフラム板６１を支持しているダイアフラム６３の部分と共に下方向へ移動して、内側筒部１０１の上端部の主弁座部１０１１に当接することにより、ダイアフラム板下部６１１が内側筒部１０１の内部空間である二次側空間１０４に入り込み、一次側空間１０３と二次側空間１０４とを遮断する。ダイアフラム板６１が、ダイアフラム板６１を支持しているダイアフラム６３の部分と共に上方向へ移動して、内側筒部１０１の主弁座部１０１１から離れることにより、一次側空間１０３と二次側空間１０４とが連通する。   With this configuration, the diaphragm plate 61 is supported by the diaphragm 63 so as to be movable in the vertical direction. The diaphragm plate 61 moves downward together with the portion of the diaphragm 63 that supports the diaphragm plate 61 and comes into contact with the main valve seat portion 1011 at the upper end portion of the inner cylinder portion 101, whereby the diaphragm plate lower portion 611 is moved to the inner side. It enters the secondary side space 104 that is the internal space of the cylindrical portion 101 and blocks the primary side space 103 and the secondary side space 104. When the diaphragm plate 61 moves upward together with the portion of the diaphragm 63 that supports the diaphragm plate 61 and moves away from the main valve seat portion 1011 of the inner cylinder portion 101, the primary side space 103 and the secondary side space 104. And communicate.

ダイアフラム板６１の上面とバルブカバー３０の下面との間には、背圧室３１が形成されている。背圧室３１は、主弁６０のダイアフラム板６１においてダイアフラム板下部６１１が設けられている側に対する背面側、即ち、一次側空間１０３と二次側空間１０４とが連通するダイアフラム板上部６１２の側（ダイアフラム板上部６１２の上側）に形成されている。背圧室３１は、主弁６０と共にダイアフラム部を構成する。バルブカバー３０の下端部には、フック部３０１が、バルブカバー３０の直径方向位置に一対設けられている。フック部３０１は、フック係止部１０７の貫通孔に係合することにより、フック係止部１０７に係止される。これによりバルブカバー３０は、バルブベース１０に固定される。   A back pressure chamber 31 is formed between the upper surface of the diaphragm plate 61 and the lower surface of the valve cover 30. The back pressure chamber 31 is on the back side of the diaphragm plate 61 of the main valve 60 where the diaphragm plate lower portion 611 is provided, that is, on the side of the diaphragm plate upper portion 612 where the primary side space 103 and the secondary side space 104 communicate with each other. It is formed on the upper side of the upper diaphragm plate 612. The back pressure chamber 31 constitutes a diaphragm portion together with the main valve 60. A pair of hook portions 301 are provided at the lower end portion of the valve cover 30 at positions in the diameter direction of the valve cover 30. The hook portion 301 is locked to the hook locking portion 107 by engaging with the through hole of the hook locking portion 107. Thereby, the valve cover 30 is fixed to the valve base 10.

上下方向におけるバルブカバー３０の中央よりも上側には、溝３０２が形成されている。溝３０２は、バルブカバー３０の全周にわたって形成されている。溝３０２には、Ｏリング３２が設けられている。Ｏリング３２は、バルブカバー３０を一周するように装着されている。Ｏリング３２は、隙間１１３等により構成される二次側副流路から外部に水が漏れないようにするための止水を行う。即ちＯリング３２とＯリング１０５２とにより、隙間１１３により構成される二次側副流路の上下において止水が行われる。また、溝３０２のすぐ上側には、バルブカバー３０の上端部の周縁の全周にわたって、上端壁部３０３が設けられている。   A groove 302 is formed above the center of the valve cover 30 in the vertical direction. The groove 302 is formed over the entire circumference of the valve cover 30. An O-ring 32 is provided in the groove 302. The O-ring 32 is mounted so as to go around the valve cover 30. The O-ring 32 performs water stop to prevent water from leaking to the outside from the secondary side sub-channel constituted by the gap 113 and the like. In other words, the O-ring 32 and the O-ring 1052 stop water at the upper and lower sides of the secondary side sub-flow channel formed by the gap 113. Further, an upper end wall portion 303 is provided immediately above the groove 302 over the entire periphery of the upper end portion of the valve cover 30.

バルブカバー３０の上面の中央には、下方に窪んだ中央凹部３３が形成されている。背圧室３１の天井を構成するバルブカバー３０の下面には、上方向へ延びる２本の貫通孔３０４（図６参照）が形成されている。貫通孔３０４は、背圧室３１の中心に対して直径位置に一対形成されており、貫通孔３０４の上端部は、中央凹部３３の近傍において、上方向へ向って開口している。また、中央凹部３３の底部における側面には、中央凹部３３とバルブカバー３０の外部の空間とを連通するバルブカバー連通孔３０５が形成されている。バルブカバー連通孔３０５は、バルブベース１０及びバルブカバー３０の軸心を中心として、バルブベース１０及びバルブカバー３０の周方向へ、バルブベース径方向貫通流路１０６１から９０°の位置関係で配置されており、バルブカバー３０の直径位置に、本体部を構成するバルブベース１０の径方向においてバルブカバー３０を貫通するようにバルブカバー３０に一対形成されている。バルブカバー連通孔３０５は、中央凹部３３内の水を、バルブカバー３０及びバルブベース１０により構成される本体部の周囲に、より具体的には、当該本体部の外周面上と、図２に示す管部材９の内周面との間において、バルブベース１０の周方向の全周にわたって形成された隙間１１３（図２参照）に流通させる。このように隙間１１３がバルブベース１０の周方向の全周にわたって形成されているため、バルブカバー連通孔３０５やバルブベース径方向貫通流路１０６１の経路幅よりも隙間１１３の幅を小さくすることができる。この結果、パイロット式電磁弁１全体の径方向の大きさが小さく構成されている。   At the center of the upper surface of the valve cover 30, a central recess 33 is formed that is recessed downward. Two through holes 304 (see FIG. 6) extending upward are formed on the lower surface of the valve cover 30 that constitutes the ceiling of the back pressure chamber 31. A pair of through-holes 304 are formed at a diameter position with respect to the center of the back pressure chamber 31, and the upper end portion of the through-hole 304 is open upward in the vicinity of the central recess 33. In addition, a valve cover communication hole 305 that connects the central recess 33 and the space outside the valve cover 30 is formed on the side surface of the bottom of the central recess 33. The valve cover communication hole 305 is arranged in a positional relationship of 90 ° from the valve base radial through passage 1061 in the circumferential direction of the valve base 10 and the valve cover 30 with the shaft center of the valve base 10 and the valve cover 30 as the center. A pair of the valve cover 30 is formed at the diameter position of the valve cover 30 so as to penetrate the valve cover 30 in the radial direction of the valve base 10 constituting the main body. The valve cover communication hole 305 allows the water in the central concave portion 33 to flow around the main body configured by the valve cover 30 and the valve base 10, more specifically, on the outer peripheral surface of the main body and in FIG. It is made to distribute | circulate through the clearance gap 113 (refer FIG. 2) formed over the perimeter of the circumferential direction of the valve base 10 between the inner peripheral surfaces of the pipe member 9 to show. Since the gap 113 is formed over the entire circumference in the circumferential direction of the valve base 10 in this way, the width of the gap 113 can be made smaller than the path width of the valve cover communication hole 305 and the valve base radial direction through flow path 1061. it can. As a result, the overall size of the pilot solenoid valve 1 in the radial direction is small.

コイル部４０は、ヨーク４１と、コア４２とコイル４３と磁石４４とを有する副弁駆動部と、を備えており、また、副弁駆動部によって駆動され背圧室３１と後述の二次側副流路との遮断と連通との切替えをする副弁としてのプランジャー４５を備えている。プランジャー４５は、円筒形状を有する筒状部材４６の内部に収納されており、主弁６０と同軸上に配置されている。即ち、プランジャー４５の軸心と主弁６０の軸心とは、一致する位置関係を有している。ここで、「同軸上」、「一致する位置関係」とは、完全に「同軸上」、完全に「一致する位置関係」であることを意味するのみならず、若干「同軸上」、「一致する位置関係」から外れていても、おおよそ「同軸上」、「一致する位置関係」であることも含む。プランジャー４５は、筒状部材４６の内部を上下方向に移動可能に、筒状部材４６に支持されている。副弁駆動部によるプランジャー４５の駆動により、副弁による背圧室３１と、バルブカバー連通孔３０５等により構成される二次側副流路と、の遮断と連通との切替えが行われる。   The coil unit 40 includes a yoke 41, a sub valve drive unit having a core 42, a coil 43, and a magnet 44. The coil unit 40 is driven by the sub valve drive unit and a back pressure chamber 31 and a secondary side described later. A plunger 45 is provided as a sub valve for switching between blocking and communication with the sub flow path. The plunger 45 is housed inside a cylindrical member 46 having a cylindrical shape, and is arranged coaxially with the main valve 60. That is, the axial center of the plunger 45 and the axial center of the main valve 60 have a matching positional relationship. Here, “on the same axis” and “matching positional relationship” not only mean “on the same axis” and completely “matching positional relationship”, but also on “coaxial” and “matching”. Even if it is out of the “positional relationship”, it also includes “coaxial” and “matching positional relationship”. The plunger 45 is supported by the cylindrical member 46 so as to be movable in the vertical direction inside the cylindrical member 46. By driving the plunger 45 by the auxiliary valve driving unit, the back pressure chamber 31 by the auxiliary valve and the secondary side auxiliary flow path constituted by the valve cover communication hole 305 and the like are switched between cutoff and communication.

ヨーク４１は、上端部が塞がれた円筒形状を有しており、筒状部材４６と同軸的な位置関係を有している。ヨーク４１の内部空間には、コア４２とコイル４３と磁石４４と筒状部材４６とプランジャー４５とが収容されており、ヨーク４１は、筒状部材４６に固定されている。筒状部材４６は、圧入によりバルブカバー３０に固定されている。バルブカバー３０の周方向における、バルブカバー３０、ヨーク４１の向きは、ヨーク４１の突出部４１４とバルブカバー３０の切欠き部３０６とにより決定される。ヨーク４１の下端部には、被固定部４１１が設けられている。被固定部４１１は、ヨーク４１の直径位置に一対設けられており、図１等に示すように、それぞれ板状の、角が面取りされた形状の三角形状を有し、それぞれ貫通孔４１２が形成されている。図２に示すように、被固定部４１１の貫通孔４１２にビス４１３が上側から貫通すると共に、管部材９の側面に設けられた固定部９０３の貫通孔９０４に螺合することにより、固定部９０３に被固定部４１１が固定され、これにより、管部材９にパイロット式電磁弁１は固定されている。即ち、パイロット式電磁弁１は、一次側流路１１１に流入する流路（一次側流路１１１の上流側の管部材一次側流路９０８）と二次側流路１１２から流出する流路（二次側流路１１２の下流側の管部材二次側流路９０９）とを備えている管部材９に固定可能に形成されている。   The yoke 41 has a cylindrical shape whose upper end is closed and has a coaxial positional relationship with the cylindrical member 46. A core 42, a coil 43, a magnet 44, a cylindrical member 46, and a plunger 45 are accommodated in the internal space of the yoke 41, and the yoke 41 is fixed to the cylindrical member 46. The cylindrical member 46 is fixed to the valve cover 30 by press-fitting. The direction of the valve cover 30 and the yoke 41 in the circumferential direction of the valve cover 30 is determined by the protruding portion 414 of the yoke 41 and the notch portion 306 of the valve cover 30. A fixed portion 411 is provided at the lower end of the yoke 41. A pair of fixed portions 411 are provided at the diameter position of the yoke 41, and each plate-like portion has a triangular shape with a chamfered corner and a through-hole 412 as shown in FIG. Has been. As shown in FIG. 2, the screw 413 penetrates the through hole 412 of the fixed portion 411 from above and is screwed into the through hole 904 of the fixing portion 903 provided on the side surface of the tube member 9. The fixed portion 411 is fixed to 903, whereby the pilot type electromagnetic valve 1 is fixed to the pipe member 9. That is, the pilot-type solenoid valve 1 has a flow path that flows into the primary flow path 111 (a pipe member primary flow path 908 on the upstream side of the primary flow path 111) and a flow path that flows out of the secondary flow path 112 ( It is formed to be fixable to a pipe member 9 having a pipe member secondary side flow path 909) on the downstream side of the secondary side flow path 112.

図３に示すように、コイル４３は、筒状部材４６の外周に巻回されている。コア４２は、プランジャー４５の上側に配置されている。プランジャー４５の軸心位置には、圧縮ばねにより構成されるばね４８が設けられている。ばね４８は、プランジャー４５の軸心位置に形成され当該軸心に沿って延びる穴に配置されている。ばね４８は、コア４２に対してプランジャー４５を下方向へ付勢している。また、コア４２の上側には、磁石４４が設けられている。   As shown in FIG. 3, the coil 43 is wound around the outer periphery of the cylindrical member 46. The core 42 is disposed on the upper side of the plunger 45. A spring 48 constituted by a compression spring is provided at the axial center position of the plunger 45. The spring 48 is disposed in a hole formed at the axial center position of the plunger 45 and extending along the axial center. The spring 48 urges the plunger 45 downward with respect to the core 42. A magnet 44 is provided on the upper side of the core 42.

磁石４４の磁力によってプランジャー４５は、上側の位置に保持される。また、コイル４３に電気が供給されることによるコイル４３の磁力によって、プランジャー４５は下側の位置に移動させられる。このときには、プランジャー４５に対する磁石４４の磁力はばね４８の付勢力よりも弱く、ばね４８の付勢力により、プランジャー４５は、下側の位置に保持される。即ち、副弁駆動部の駆動方式は、プランジャー４５により構成される副弁が開いている状態と、閉じている状態とを切替える際にのみコイル４３に通電するラッチ式である。プランジャー４５が上側の位置から下側の位置に移動させられる際に供給される電気とは逆向きに電気が供給されることより、プランジャー４５は下側の位置から上側の位置に移動させられる。   The plunger 45 is held at the upper position by the magnetic force of the magnet 44. Further, the plunger 45 is moved to a lower position by the magnetic force of the coil 43 when electricity is supplied to the coil 43. At this time, the magnetic force of the magnet 44 with respect to the plunger 45 is weaker than the biasing force of the spring 48, and the plunger 45 is held at the lower position by the biasing force of the spring 48. That is, the drive system of the sub valve drive unit is a latch type in which the coil 43 is energized only when the sub valve constituted by the plunger 45 is switched between the open state and the closed state. Since electricity is supplied in the opposite direction to that supplied when the plunger 45 is moved from the upper position to the lower position, the plunger 45 is moved from the lower position to the upper position. It is done.

筒状部材４６の下部は、図６に示すように、２枚の板状部４６４、４６５を有しており、コイル４３は、上側の板状部４６４よりも上側に配置されている。２枚の板状部４６４、４６５の間には、ロアプレート４７が配置されている。筒状部材４６の下端部は、コイル４３を支持する筒状部材４６の上部に一体成形され筒状部材４６の一部を構成するバルブシート部４６１を有している。バルブシート部４６１は、筒状部材４６の下端部において筒状部材４６の内部空間を塞ぐように設けられており、バルブシート部４６１の外周面と中央凹部３３を形成しているバルブカバー３０の部分との間は、２つのＯリング４６２、４６３によりシールされている。Ｏリング４６２は、背圧室３１から貫通孔３０４を通してプランジャー４５へ流れる水が外部に漏れないように止水する。Ｏリング４６３は、小孔６１５により構成される１次側副流路と、バルブカバー連通孔３０５等により構成される二次側副流路との間を止水する。   As shown in FIG. 6, the lower portion of the cylindrical member 46 has two plate-like portions 464 and 465, and the coil 43 is disposed above the upper plate-like portion 464. A lower plate 47 is disposed between the two plate-like portions 464 and 465. The lower end portion of the cylindrical member 46 has a valve seat portion 461 that is integrally formed on the upper portion of the cylindrical member 46 that supports the coil 43 and constitutes a part of the cylindrical member 46. The valve seat portion 461 is provided at the lower end portion of the tubular member 46 so as to close the internal space of the tubular member 46. The valve seat portion 461 is formed on the outer peripheral surface of the valve seat portion 461 and the central cover 33. The two parts are sealed by two O-rings 462 and 463. The O-ring 462 stops water so that water flowing from the back pressure chamber 31 to the plunger 45 through the through hole 304 does not leak to the outside. The O-ring 463 stops water between the primary side secondary flow path constituted by the small holes 615 and the secondary side secondary flow path constituted by the valve cover communication hole 305 and the like.

バルブシート部４６１は、プランジャー４５の下端部４５２が当接する弁座としてのシート部４６１１（図６参照）を有している。シート部４６１１の上部は、截頭円錐形状を有しており、その軸心位置には、上下方向に貫通する貫通孔４６１２が形成されている。貫通孔４６１２の上端部の開口の周縁部は、開口の内側から外側にわたって連続するＲ形状の曲面により構成されている。即ち、貫通孔４６１２を形成するシート部４６１１の内周面とシート部４６１１の外周面とが接続されているシート部４６１１の上端部は、図６、図９に示すように、貫通孔４６１２を形成しているシート部４６１１の内周面からシート部４６１１の上面に至るまで連続するＲ形状の曲面４６１５により構成されている。これにより、曲面４６１５の部分においては、貫通孔４６１２により構成される二次側副流路の上流側から下流側に向かって縮径している縮径部４６１６をなしている。二次側副流路における縮径部４６１６の上流端の直径ｄよりも、大径部４６１４の直径Ｄ（図３参照）の方が大きい。Ｒ形状の曲面４６１５は、例えば、図１０に示すように、シート部４６１１（図６参照）の上面を成形する金型の可動型８０１の一部に、Ｒ形状のキャビティ形成面８０２１を有する中子８０２が用いられることにより、キャビティ８１において成形される。
図９は、本発明の一実施形態に係るパイロット式電磁弁１のシート部４６１１を示す拡大断面図である。図１０は、本発明の一実施形態に係るパイロット式電磁弁１のシート部４６１１を成形する金型の一部を示す拡大断面図である。 The valve seat portion 461 has a seat portion 4611 (see FIG. 6) as a valve seat with which the lower end portion 452 of the plunger 45 abuts. The upper portion of the seat portion 4611 has a frustoconical shape, and a through hole 4612 that penetrates in the vertical direction is formed at the axial center position. The peripheral edge of the opening at the upper end of the through hole 4612 is formed by an R-shaped curved surface that extends from the inside to the outside of the opening. That is, the upper end portion of the sheet portion 4611 where the inner peripheral surface of the sheet portion 4611 forming the through-hole 4612 and the outer peripheral surface of the sheet portion 4611 are connected has the through-hole 4612 as shown in FIGS. It is composed of an R-shaped curved surface 4615 that continues from the inner peripheral surface of the formed sheet portion 4611 to the upper surface of the sheet portion 4611. As a result, the portion of the curved surface 4615 has a reduced diameter portion 4616 that is reduced in diameter from the upstream side to the downstream side of the secondary side sub-flow channel constituted by the through hole 4612. The diameter D (see FIG. 3) of the large diameter portion 4614 is larger than the diameter d of the upstream end of the reduced diameter portion 4616 in the secondary side sub-channel. For example, as shown in FIG. 10, the R-shaped curved surface 4615 has an R-shaped cavity forming surface 8021 in a part of a movable mold 801 that molds the upper surface of the sheet portion 4611 (see FIG. 6). By using the child 802, the cavity 81 is molded.
FIG. 9 is an enlarged cross-sectional view showing the seat portion 4611 of the pilot solenoid valve 1 according to one embodiment of the present invention. FIG. 10 is an enlarged cross-sectional view showing a part of a mold for forming the seat portion 4611 of the pilot solenoid valve 1 according to the embodiment of the present invention.

図６に示すように、貫通孔４６１２は、シート部４６１１の上端部から所定の位置に至るまでの部分は、一定の径を有しており、その部分よりも下側の部分は、円錐形状に徐々に拡径する拡径部４６１３を有している。更に拡径部４６１３よりも下側の部分は、拡径部４６１３の最も大径の部分と同一の径で一定の径を有する大径部４６１４を有している。シート部４６１１の下端部は、中央凹部３３の底面３３１よりも高い位置に配置されている。これにより、シート部４６１１の貫通孔４６１２の内部空間とバルブカバー連通孔３０５とが、シート部４６１１の下端部と中央凹部３３の底面３３１との間の空間により連通している。   As shown in FIG. 6, the through hole 4612 has a constant diameter from the upper end of the seat portion 4611 to a predetermined position, and the portion below the portion has a conical shape. A diameter-enlarged portion 4613 that gradually increases in diameter is provided. Further, the portion below the enlarged diameter portion 4613 has a large diameter portion 4614 having the same diameter as the largest diameter portion of the enlarged diameter portion 4613 and a constant diameter. The lower end portion of the sheet portion 4611 is disposed at a position higher than the bottom surface 331 of the central recessed portion 33. As a result, the internal space of the through hole 4612 of the seat portion 4611 and the valve cover communication hole 305 are communicated with each other by the space between the lower end portion of the seat portion 4611 and the bottom surface 331 of the central recess 33.

シート部４６１１の貫通孔４６１２、バルブカバー連通孔３０５、管部材９に固定されたバルブカバー３０及びバルブベース１０の外表面と管部材９の内周面との隙間１１３、及び、バルブベース径方向貫通流路１０６１は、背圧室３１から水を二次側空間１０４に流通させる二次側副流路を構成する。従って、バルブシート部４６１のシート部４６１１は、二次側副流路の上流側の端部に設けられており、拡径部４６１３は、弁座であるシート部４６１１の上端部よりも二次側副流路の下流側の部分を構成する。そして、二次側副流路は、主弁６０には形成されておらず、主弁６０を迂回するように主弁６０の周囲に形成されている。より具体的には、上下方向において、二次側副流路の上流端（図９における直径ｄで示す部分）と、ダイアフラム６３の可動部６３２（図８等参照）と、下流端１０６２（図８参照）とが重なる位置にあり、二次側副流路の途中の経路である隙間１１３が、ダイアフラム６３の可動部６３２（図８参照）に重ならない部分である、ダイアフラム６３の周囲に迂回して形成されている。そして、二次側流路１１２への二次側副流路の開口である二次側副流路の下流端は、二次側空間１０４の水の流れにおけるダイアフラム板６１の下流側の端部（図８におけるダイアフラム板下部６１１の下端部６１１１）よりも上流側（図８における上側）に位置している。ここで、上下方向において、二次側副流路の上流端と、ダイアフラムの可動部とが重なる位置にあれば、二次側副流路の下流端は、ダイアフラムの可動部と重なっていなくてもよい。この場合であっても、二次側副流路の上流端と、二次側副流路の下流端とは、直線状の二次側副流路で連通せずに、ダイアフラムの可動部の存在により、ダイアフラムを迂回するように形成された二次側副流路によって連通する。   The through hole 4612 of the seat portion 4611, the valve cover communication hole 305, the valve cover 30 fixed to the pipe member 9, the gap 113 between the outer surface of the valve base 10 and the inner peripheral surface of the pipe member 9, and the valve base radial direction The through channel 1061 constitutes a secondary side sub channel that allows water to flow from the back pressure chamber 31 to the secondary side space 104. Accordingly, the seat portion 4611 of the valve seat portion 461 is provided at the upstream end portion of the secondary side sub-flow path, and the diameter-expanded portion 4613 is secondary than the upper end portion of the seat portion 4611 that is the valve seat. A downstream portion of the collateral flow path is configured. The secondary side sub-channel is not formed in the main valve 60 but is formed around the main valve 60 so as to bypass the main valve 60. More specifically, in the vertical direction, the upstream end (portion indicated by the diameter d in FIG. 9) of the secondary side sub-channel, the movable portion 632 of the diaphragm 63 (see FIG. 8, etc.), and the downstream end 1062 (FIG. 8), and the gap 113, which is a path in the middle of the secondary side sub-flow path, detours around the diaphragm 63, which does not overlap the movable portion 632 of the diaphragm 63 (see FIG. 8). Is formed. The downstream end of the secondary side sub-channel that is the opening of the secondary side sub-channel to the secondary side channel 112 is the downstream end of the diaphragm plate 61 in the flow of water in the secondary space 104. It is located on the upstream side (upper side in FIG. 8) from (the lower end portion 6111 of the diaphragm plate lower part 611 in FIG. 8). Here, in the vertical direction, if the upstream end of the secondary side sub-channel and the movable portion of the diaphragm overlap each other, the downstream end of the secondary side sub-channel does not overlap the movable portion of the diaphragm. Also good. Even in this case, the upstream end of the secondary side secondary flow path and the downstream end of the secondary side secondary flow path are not communicated with each other by the linear secondary side secondary flow path, and the movable portion of the diaphragm is not connected. Due to the presence, the secondary side sub-channel formed so as to bypass the diaphragm communicates.

次に、主弁６０を開く動作について説明する。
図５は、本発明の一実施形態に係るパイロット式電磁弁１において、一次側流路１１１から一次側空間１０３へ水が流入する様子を示す説明図である。図６は、本発明の一実施形態に係るパイロット式電磁弁１において、背圧室３１に流入した水が第二副流路へ流入する様子を示す説明図である。図７は、本発明の一実施形態に係るパイロット式電磁弁１において、第二副流路を水が流通する様子を示す説明図である。図８は、本発明の一実施形態に係るパイロット式電磁弁１において、第二副流路から二次側空間１０４へ水が流通する様子を示す説明図である。 Next, an operation for opening the main valve 60 will be described.
FIG. 5 is an explanatory diagram illustrating a state in which water flows from the primary side flow path 111 to the primary side space 103 in the pilot solenoid valve 1 according to the embodiment of the present invention. FIG. 6 is an explanatory diagram illustrating a state in which water that has flowed into the back pressure chamber 31 flows into the second sub-flow channel in the pilot solenoid valve 1 according to the embodiment of the present invention. FIG. 7 is an explanatory diagram illustrating a state in which water flows through the second sub-flow channel in the pilot solenoid valve 1 according to the embodiment of the present invention. FIG. 8 is an explanatory diagram showing a state in which water flows from the second sub-flow path to the secondary side space 104 in the pilot solenoid valve 1 according to one embodiment of the present invention.

先ず、主弁６０が開く前の閉じている状態について説明する。主弁６０が閉じている状態、即ち、主弁６０が内側筒部１０１の主弁座部１０１１における開口を塞いでいる状態のときには、プランジャー４５は、バルブシート部４６１のシート部４６１１の上端部の開口を塞いでいる。このとき、一次側流路１１１から一次側空間１０３に流入した水は、小孔６１５を通過して背圧室３１へ流入しており、これにより、背圧室３１には水が充填されている。このため、背圧室３１の圧力及びばね６４の付勢力によって主弁６０は、下方向へ付勢されているため、主弁６０は、内側筒部１０１の主弁座部１０１１に押しけられ、開口を塞いでいる状態が維持されている。   First, the closed state before the main valve 60 is opened will be described. When the main valve 60 is closed, that is, when the main valve 60 is closing the opening in the main valve seat portion 1011 of the inner cylinder portion 101, the plunger 45 is at the upper end of the seat portion 4611 of the valve seat portion 461. The opening of the part is blocked. At this time, the water flowing into the primary space 103 from the primary channel 111 passes through the small hole 615 and flows into the back pressure chamber 31, whereby the back pressure chamber 31 is filled with water. Yes. For this reason, since the main valve 60 is biased downward by the pressure of the back pressure chamber 31 and the biasing force of the spring 64, the main valve 60 is pushed by the main valve seat portion 1011 of the inner cylinder portion 101. The state of closing the opening is maintained.

次に、主弁６０が閉じている状態から開く動作について説明する。
コイル４３に電気が供給されて、プランジャー４５がばね４８の付勢力に抗して上側の位置に移動させられると、バルブシート部４６１のシート部４６１１の上端部の開口が開かれる。これにより、背圧室３１内の水がシート部４６１１の上端部の開口から貫通孔４６１２内に流入し、バルブカバー連通孔３０５からバルブカバー３０の外周面上に流出する。そして水は、バルブカバー３０と管部材９の内周面との間、及び、バルブベース１０と管部材９の内周面との間の隙間１１３を流通して、バルブベース径方向貫通流路１０６１に流入し、内側筒部１０１の内部空間である二次側空間１０４へ流入する。そして、二次側流路１１２へ流通する。これにより背圧室３１の圧力が低下し、一次側空間１０３の圧力が背圧室３１の圧力及びばね６４の付勢力よりも高くなり、主弁６０は上方向へ移動して主弁６０が開き、一次側空間１０３と、二次側空間１０４が連通し、一次側空間１０３の水が二次側空間１０４へ流通する。 Next, an operation for opening the main valve 60 from a closed state will be described.
When electricity is supplied to the coil 43 and the plunger 45 is moved to the upper position against the biasing force of the spring 48, the opening at the upper end of the seat portion 4611 of the valve seat portion 461 is opened. Thereby, the water in the back pressure chamber 31 flows into the through hole 4612 from the opening at the upper end of the seat portion 4611, and flows out from the valve cover communication hole 305 onto the outer peripheral surface of the valve cover 30. Then, the water flows through the gap 113 between the valve cover 30 and the inner peripheral surface of the pipe member 9 and between the valve base 10 and the inner peripheral surface of the pipe member 9, thereby passing through the valve base radial passage. 1061 flows into the secondary side space 104 that is the internal space of the inner cylinder portion 101. And it distribute | circulates to the secondary side flow path 112. FIG. As a result, the pressure in the back pressure chamber 31 decreases, the pressure in the primary space 103 becomes higher than the pressure in the back pressure chamber 31 and the biasing force of the spring 64, the main valve 60 moves upward, and the main valve 60 moves. The primary side space 103 and the secondary side space 104 communicate with each other, and the water in the primary side space 103 flows to the secondary side space 104.

上記構成の実施形態によるパイロット式電磁弁１によれば、以下のような効果を得ることができる。
本実施形態におけるパイロット式電磁弁１は、主弁６０及び背圧室３１を含むダイアフラム部と、ダイアフラム部に向って液体が流入する一次側流路１１１と、ダイアフラム部からの液体が流出する二次側流路１１２と、ダイアフラム部を構成し、一次側空間１０３と二次側空間１０４との遮断と連通との切替えをする主弁６０と、主弁６０における一次側部と二次側部とが連通する側に対する背面側に形成された背圧室３１と、主弁６０に形成され、一次側空間１０３から背圧室３１に水を流通させることにより、背圧室３１内の圧力を上昇させる一次側副流路としての小孔６１５と、背圧室３１から液体を二次側空間１０４に流通させる二次側副流路（貫通孔４６１２、バルブカバー連通孔３０５、隙間１１３、及び、バルブベース径方向貫通流路１０６１）と、背圧室３１と二次側流路１１２との遮断と連通との切替えをする副弁としてのプランジャー４５と、プランジャー４５による切替えをするためにプランジャー４５を駆動する副弁駆動部（コア４２、コイル４３、磁石４４）と、を備える。
二次側副流路は、主弁６０に形成されておらず、主弁６０を迂回するように主弁６０の周囲に形成されている。 According to the pilot solenoid valve 1 according to the embodiment having the above-described configuration, the following effects can be obtained.
The pilot type electromagnetic valve 1 in this embodiment includes a diaphragm part including a main valve 60 and a back pressure chamber 31, a primary flow path 111 through which liquid flows in toward the diaphragm part, and liquid from the diaphragm part flows out. The main valve 60 which comprises the secondary side flow path 112 and a diaphragm part, and performs switching of interruption | blocking and communication with the primary side space 103 and the secondary side space 104, and the primary side part and secondary side part in the main valve 60 The back pressure chamber 31 formed on the back side with respect to the side that communicates with the main valve 60, and water is circulated from the primary space 103 to the back pressure chamber 31 to reduce the pressure in the back pressure chamber 31. A small hole 615 as a primary side secondary flow path to be raised, and a secondary side secondary flow path (through hole 4612, valve cover communication hole 305, gap 113, and the like) through which liquid flows from the back pressure chamber 31 to the secondary side space 104 , Valve base diameter A through-flow channel 1061), a plunger 45 as a sub-valve for switching between blocking and communication between the back pressure chamber 31 and the secondary-side channel 112, and a plunger 45 for switching by the plunger 45. A sub-valve drive unit (core 42, coil 43, magnet 44) for driving.
The secondary side sub-flow path is not formed in the main valve 60 but is formed around the main valve 60 so as to bypass the main valve 60.

この構成により、二次側副流路が主弁６０を迂回するように主弁６０の周囲に形成されていることで、例えば、プランジャー４５と主弁６０とが同軸上に配置された構成である場合でも、上下に駆動されるプランジャー４５のストロークを必要最低限とすることができる。これにより、パイロット式電磁弁１の小型化及び省電力化を図ることが可能となる。
即ち、磁気回路定数をｋとし、コイル４３の巻数をｎとし、コイル４３に供給される電流をＩとし、プランジャー４５とコア４２との接触面積をＳｔとし、プランジャー４５のストロークをＬとすると、プランジャー４５を駆動する力Ｆは、
Ｆ ＝ ｋ（ｎＩ）２Ｓｔ／Ｌ２
で表される。このため、プランジャー４５のストロークＬが長くなると、ＦはＬの二乗に反比例して小さくなる。しかし、本実施形態では、プランジャー４５のストロークを必要最低限とすることができるため、パイロット式電磁弁１の小型化及び省電力化を図ることが可能となる。
この結果、パイロット式電磁弁１を、管部材９の開口部９０１に本体部を挿入して容易に固定して使用することが可能なカートリッジタイプとすることが可能となる。カートリッジタイプとすることにより、パイロット式電磁弁１を、様々な部品に組み込んで用いることが可能となり、また、パイロット式電磁弁１の取外しも容易であるため、パイロット式電磁弁１のメンテナンスも容易とすることが可能である。 With this configuration, the secondary side sub-channel is formed around the main valve 60 so as to bypass the main valve 60, so that, for example, the plunger 45 and the main valve 60 are arranged coaxially. Even in this case, the stroke of the plunger 45 driven up and down can be minimized. Thereby, it is possible to reduce the size and power consumption of the pilot solenoid valve 1.
That is, the magnetic circuit constant is k, the number of turns of the coil 43 is n, the current supplied to the coil 43 is I, the contact area between the plunger 45 and the core 42 is St, and the stroke of the plunger 45 is L. Then, the force F for driving the plunger 45 is
F = k (nI) 2 St / L 2
It is represented by For this reason, when the stroke L of the plunger 45 becomes longer, F becomes smaller in inverse proportion to the square of L. However, in this embodiment, the stroke of the plunger 45 can be minimized, so that the pilot solenoid valve 1 can be reduced in size and power can be saved.
As a result, the pilot type electromagnetic valve 1 can be made into a cartridge type that can be used by being easily fixed by inserting the main body into the opening 901 of the pipe member 9. By adopting the cartridge type, the pilot type solenoid valve 1 can be used by being incorporated into various parts, and the pilot type solenoid valve 1 can be easily detached, so that the pilot type solenoid valve 1 can be easily maintained. Is possible.

また、パイロット式電磁弁１は、主弁６０を収容する本体部としてのバルブベース１０及びバルブカバー３０を備える。
二次側副流路は、本体部の外面と、本体部が固定される被固定部材としての管部材９との間に隙間１１３として形成される。この構成により、本体部の外面と、本体部が固定される管部材９との間に形成される隙間１１３において、主弁６０を迂回するように主弁６０の周囲に水を流すことが可能となる。 The pilot type electromagnetic valve 1 includes a valve base 10 and a valve cover 30 as a main body portion that accommodates the main valve 60.
The secondary side sub-channel is formed as a gap 113 between the outer surface of the main body and the tube member 9 as a fixed member to which the main body is fixed. With this configuration, water can flow around the main valve 60 so as to bypass the main valve 60 in a gap 113 formed between the outer surface of the main body and the pipe member 9 to which the main body is fixed. It becomes.

また、二次側副流路の上流側の端部には、副弁としてのプランジャー４５が当接するシート部４６１１が設けられ、シート部４６１１よりも二次側副流路の下流側の部分は、円錐形状に徐々に拡径する拡径部４６１３を有している。この構成により、プランジャー４５の動作に対する主弁６０の応答性を高めることが可能となる。   In addition, a seat portion 4611 with which a plunger 45 as a sub valve abuts is provided at an upstream end portion of the secondary side sub flow channel, and a portion on the downstream side of the secondary side sub flow channel with respect to the seat portion 4611. Has a diameter-expanded portion 4613 that gradually expands into a conical shape. With this configuration, the responsiveness of the main valve 60 to the operation of the plunger 45 can be enhanced.

即ち、主弁６０が上下するときの背圧室３１の容積の変化をΔＶとし、シート部４６１１の貫通孔４６１２の断面積をＳとし、流量係数をｃとし、背圧室３１の圧力と二次側副流路の圧力との差をＰ１−Ｐ２とすると、プランジャー４５による副弁が開いてから、主弁６０が開くまでの時間ｔは、
ｔ ＝ ΔＶ／Ｓｃ√（Ｐ１−Ｐ２）
で表される。ここで、拡径部４６１３が形成されていることにより流量係数をｃの値を大きくすることができ、これにより、プランジャー４５の動作に対する主弁６０の応答性を高めることが可能となる。 That is, the change in volume of the back pressure chamber 31 when the main valve 60 moves up and down is ΔV, the cross-sectional area of the through hole 4612 of the seat portion 4611 is S, the flow coefficient is c, and the pressure in the back pressure chamber 31 is Assuming that the difference from the pressure of the secondary side secondary flow path is P1-P2, the time t from when the secondary valve by the plunger 45 is opened until the main valve 60 is opened is:
t = ΔV / Sc√ (P1-P2)
It is represented by Here, since the diameter-enlarged portion 4613 is formed, the value of the flow rate coefficient c can be increased, whereby the responsiveness of the main valve 60 to the operation of the plunger 45 can be enhanced.

また、二次側副流路の上流側の端部の開口を形成し副弁としてのプランジャー４５が当接する弁座としてのシート部４６１１の開口周縁部は、二次側副流路の上流側から下流側に向かって縮径している縮径部４６１６を有している。即ち、シート部４６１１の開口周縁部は、開口の内側から外側にわたって連続するＲ形状の曲面により構成されている。このように連続するＲ形状の曲面となるように設計することにより、主弁６０の応答性が悪くなることを回避することが可能となる。   Further, the opening peripheral edge portion of the seat portion 4611 as a valve seat that forms an opening at the upstream end of the secondary side sub-flow channel and contacts the plunger 45 as a sub-valve is located upstream of the secondary side sub-flow channel. It has a reduced diameter portion 4616 that is reduced in diameter from the side toward the downstream side. That is, the opening peripheral edge of the sheet portion 4611 is formed by an R-shaped curved surface that continues from the inside to the outside of the opening. By designing to have a continuous R-shaped curved surface in this way, it is possible to avoid the deterioration of the responsiveness of the main valve 60.

また、二次側副流路１２２における縮径部４６１６の上流端の直径ｄよりも拡径部４６１３の直径Ｄの方が大きい。直径ｄが大きすぎるとプランジャー４５で閉じる流路も大きくなり、パイロット式電磁弁１の小型化に繋がらなくなるが、このような構成とすることで、パイロット式電磁弁１の小型化を図ることが可能となる。   Further, the diameter D of the enlarged diameter portion 4613 is larger than the diameter d of the upstream end of the reduced diameter portion 4616 in the secondary side sub-channel 122. If the diameter d is too large, the flow path that is closed by the plunger 45 also becomes large, which does not lead to the downsizing of the pilot type solenoid valve 1. By adopting such a configuration, the pilot type solenoid valve 1 can be downsized. Is possible.

また、パイロット式電磁弁１は、副弁としてのプランジャー４５を駆動させるコイル４３を有するコイル部４０と、プランジャー４５が当接する弁座としてのシート部４６１１と、を備える。バルブカバー３０は、本体部を構成するバルブベース１０の径方向に貫通する貫通孔としてのバルブカバー連通孔３０５を有する。コイル部４０は、シート部４６１１を有する。本実施形態のように二次側副流路が比較的複雑な構成である場合には、副弁のシート部が長いと、背圧室３１の圧力が高くなり、背圧不良を起こす可能性がある。しかし、上記構成により、本実施形態のようにシート部４６１１から下方に貫通する貫通孔４６１２の下流側にバルブカバー連通孔３０５が径方向に延びている構成を有する場合であっても、バルブカバー３０にシート部が設けられず、コイル部４０にシート部４６１１が設けられることで、副弁の二次側副流路としての貫通孔４６１２の長さを最小限とし、背圧室３１の圧力を二次側空間１０４よりも低くすることができ、背圧不良を防止することができる。   The pilot type electromagnetic valve 1 includes a coil portion 40 having a coil 43 that drives a plunger 45 as a sub valve, and a seat portion 4611 as a valve seat with which the plunger 45 abuts. The valve cover 30 has a valve cover communication hole 305 as a through hole penetrating in the radial direction of the valve base 10 constituting the main body. The coil unit 40 includes a sheet unit 4611. In the case where the secondary side secondary flow path has a relatively complicated configuration as in the present embodiment, if the seat portion of the secondary valve is long, the pressure in the back pressure chamber 31 becomes high, which may cause back pressure failure. There is. However, even if the valve cover communication hole 305 extends in the radial direction on the downstream side of the through hole 4612 penetrating downward from the seat portion 4611 as in the present embodiment, the valve cover has the above configuration. 30 is not provided with a seat part, and the coil part 40 is provided with a seat part 4611, thereby minimizing the length of the through-hole 4612 as the secondary side secondary flow path of the secondary valve, and the pressure of the back pressure chamber 31. Can be made lower than the secondary side space 104, and back pressure failure can be prevented.

また、二次側流路１１２への二次側副流路の開口である二次側副流路の下流端１０６２は、二次側空間１０４の水の流れにおけるダイアフラム板６１の下流側の端部（図８におけるダイアフラム板の下部６１１の下端部６１１１）よりも上流側（図８における上側）に位置している。この構成により、二次側副流路（隙間１１３、バルブカバー連通孔３０５、バルブベース径方向貫通流路１０６１、貫通孔４６１２）の圧力が二次側流路１１２の圧力と比較して小さくなる。これにより二次側副流路と連通する背圧室３１の圧力も低くなり、主弁６０の開度を大きくすることができ、流量性能を向上させることが可能となる。   Further, the downstream end 1062 of the secondary side sub-channel which is the opening of the secondary side sub-channel to the secondary side channel 112 is the downstream end of the diaphragm plate 61 in the flow of water in the secondary side space 104. It is located on the upstream side (upper side in FIG. 8) from the part (lower end 6111 of the lower part 611 of the diaphragm plate in FIG. 8). With this configuration, the pressure in the secondary side sub-channel (the gap 113, the valve cover communication hole 305, the valve base radial direction through channel 1061, and the through hole 4612) is smaller than the pressure in the secondary side channel 112. . As a result, the pressure in the back pressure chamber 31 communicating with the secondary side sub-channel is also reduced, the opening degree of the main valve 60 can be increased, and the flow rate performance can be improved.

本発明は上記実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれる。
例えば、主弁、副弁、一次側副流路、二次側副流路等の各部の構成は、本実施形態における主弁６０、プランジャー４５、小孔６１５、二次側副流路（貫通孔４６１２、バルブカバー連通孔３０５、隙間１１３、及び、バルブベース径方向貫通流路１０６１）等の各部の構成に限定されない。 The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, the configuration of each part such as the main valve, the sub valve, the primary side sub flow path, the secondary side sub flow path, etc. is the main valve 60, the plunger 45, the small hole 615, the secondary side sub flow path ( The configuration is not limited to the configuration of each part such as the through hole 4612, the valve cover communication hole 305, the gap 113, and the valve base radial direction through channel 1061).

また、例えば、本実施形態では、プランジャー４５とダイアフラム６３とが同軸上に配置されたが、この構成に限定されない。また、二次側副流路は、シート部４６１１の貫通孔４６１２、バルブカバー連通孔３０５、管部材９に固定されたバルブカバー３０及びバルブベース１０の外表面と管部材９の内周面との隙間１１３、及び、バルブベース径方向貫通流路１０６１により構成されたが、この構成に限定されない。例えば、二次側副流路は、管部材９に固定されたバルブカバー３０及びバルブベース１０の外表面と管部材９の内周面との隙間１１３に代えて、バルブカバー及びバルブベースにより構成される本体部の外面に形成された溝により構成されてもよい。また、例えば、二次側副流路は、管部材９に固定されたバルブカバー３０及びバルブベース１０の外表面と管部材９の内周面との隙間１１３に代えて、バルブカバー連通孔３０５とバルブベース径方向貫通流路１０６１とを連通する他の流路が、バルブカバー及びバルブベースにより構成される本体部の内部に形成されていてもよい。   Further, for example, in this embodiment, the plunger 45 and the diaphragm 63 are arranged on the same axis, but it is not limited to this configuration. The secondary side sub-flow path includes the through hole 4612 of the seat portion 4611, the valve cover communication hole 305, the outer surface of the valve cover 30 and the valve base 10 fixed to the tube member 9, and the inner peripheral surface of the tube member 9. However, the present invention is not limited to this configuration. For example, the secondary side secondary flow path is configured by a valve cover and a valve base instead of the gap 113 between the outer surface of the valve cover 30 and valve base 10 fixed to the pipe member 9 and the inner peripheral surface of the pipe member 9. You may be comprised by the groove | channel formed in the outer surface of the main-body part made. Further, for example, the secondary side sub-flow path is replaced with the valve cover communication hole 305 instead of the gap 113 between the outer surface of the valve cover 30 and the valve base 10 fixed to the pipe member 9 and the inner peripheral surface of the pipe member 9. And another flow path that communicates with the valve base radial direction through flow path 1061 may be formed inside the main body configured by the valve cover and the valve base.

また、副弁駆動部の駆動方式は、ラッチ式であったが、これに限定されない。例えば、副弁駆動部の駆動方式は、コイル４３に通電している間は一の状態（例えば、弁が開いた状態）となり、コイル４３に通電していない間は他の状態（例えば、弁が閉じた状態）となる連続通電式であってもよい。
また、液体は、水であったが、水に限定されない。
また、拡径部４６１３は、円錐形状に徐々に拡径していたが、この構成に限定されない。例えば、拡径部は、貫通孔の軸心に直交する方向へ広がる構成等を有していてもよい。
また、コイル部４０を構成する筒状部材４６の下端部は、コイル４３を支持する筒状部材４６の上部に一体成形され筒状部材４６の一部を構成するバルブシート部４６１を有していたが、この構成に限定されない。コイル部は、弁座を有していればよい。
また、二次側流路１１２への二次側副流路の開口である二次側副流路の下流端は、二次側空間１０４の水の流れにおけるダイアフラム板６１の下流側の端部（図８におけるダイアフラム板下部６１１の下端部６１１１）よりも上流側（図８における上側）に位置していたが、少なくても主弁６０が閉状態でこのような位置関係を有していればよい。例えば主弁６０が全開状態では、二次側流路１１２への二次側副流路の開口である二次側副流路の下流端は、二次側空間１０４の水の流れにおけるダイアフラム板６１の下流側の端部よりも下流側（図８における下側）に位置していてもよい。 Moreover, although the drive system of the sub valve drive part was a latch type, it is not limited to this. For example, the driving method of the sub valve drive unit is in one state (for example, the valve is open) while the coil 43 is energized, and in the other state (for example, the valve is not energized). May be a continuous energization type.
Moreover, although the liquid was water, it is not limited to water.
Moreover, although the diameter-expanded part 4613 was gradually diameter-expanded to the conical shape, it is not limited to this structure. For example, the enlarged diameter portion may have a configuration that expands in a direction orthogonal to the axis of the through hole.
The lower end portion of the cylindrical member 46 constituting the coil portion 40 has a valve seat portion 461 that is integrally formed on the upper portion of the cylindrical member 46 that supports the coil 43 and constitutes a part of the cylindrical member 46. However, it is not limited to this configuration. The coil part should just have a valve seat.
Further, the downstream end of the secondary side sub-channel which is the opening of the secondary side sub-channel to the secondary side channel 112 is the downstream end of the diaphragm plate 61 in the water flow in the secondary side space 104. Although it is located on the upstream side (upper side in FIG. 8) from (the lower end portion 6111 of the diaphragm plate lower part 611 in FIG. 8), at least the main valve 60 is in the closed state and has such a positional relationship. That's fine. For example, when the main valve 60 is in a fully open state, the downstream end of the secondary side sub-channel that is the opening of the secondary side sub-channel to the secondary side channel 112 is a diaphragm plate in the flow of water in the secondary-side space 104. You may be located in the downstream (lower side in FIG. 8) rather than the downstream edge part of 61. FIG.

１…パイロット式電磁弁
９…管部材（被固定部材）
１０…バルブベース（本体部）
３０…バルブカバー（本体部）
３１…背圧室（ダイアフラム部）
４０…コイル部
４２…コア（副弁駆動部）
４３…コイル（副弁駆動部）
４４…磁石（副弁駆動部）
４５…プランジャー（副弁）
４６…筒状部材（コイル支持部材）
６０…主弁（ダイアフラム部）
６１…ダイアフラム板
１０１…内側筒部（隔壁）
１０３…一次側空間
１０４…二次側空間
１１１…一次側流路
１１２…二次側流路（二次側部）
１１３…隙間（二次側副流路）
３０５…バルブカバー連通孔（二次側副流路）
６１５…小孔（一次側副流路）
９０８…管部材一次側流路
９０９…管部材二次側流路
１０６１…バルブベース径方向貫通流路（二次側副流路）
１０６２…下流端（開口）
４６１２…貫通孔（二次側副流路）
４６１１…シート部（弁座）
４６１３…拡径部
６１１１…下端部（下流側の端部） DESCRIPTION OF SYMBOLS 1 ... Pilot type solenoid valve 9 ... Pipe member (fixed member)
10 ... Valve base (main part)
30 ... Valve cover (main part)
31 ... Back pressure chamber (diaphragm part)
40 ... Coil part 42 ... Core (sub valve drive part)
43 ... Coil (sub valve drive part)
44 ... Magnet (sub valve drive part)
45 ... Plunger (sub valve)
46 ... cylindrical member (coil support member)
60 ... Main valve (diaphragm part)
61 ... Diaphragm plate 101 ... Inner cylinder part (partition wall)
DESCRIPTION OF SYMBOLS 103 ... Primary side space 104 ... Secondary side space 111 ... Primary side flow path 112 ... Secondary side flow path (secondary side part)
113 ... Gap (secondary side secondary flow path)
305 ... Valve cover communication hole (secondary side secondary flow path)
615 ... Small hole (primary side secondary flow path)
908: Pipe member primary side flow path 909 ... Pipe member secondary side flow path 1061 ... Valve base radial direction through flow path (secondary side sub flow path)
1062 ... Downstream end (opening)
4612 ... Through hole (secondary side secondary flow path)
4611 ... Seat (valve seat)
4613 ... Diameter-enlarged portion 6111 ... Lower end (downstream end)

Claims (9)

ダイアフラム部と、
前記ダイアフラム部に向って液体が流入する一次側部と、
前記ダイアフラム部からの液体が流出する二次側部と、
前記ダイアフラム部を構成し、一次側部と二次側部との遮断と連通との切替えをする主弁と、
前記主弁における前記一次側部と前記二次側部が連通する側に対する背面側に形成された背圧室と、
前記主弁に形成され、前記一次側部から前記背圧室に前記液体を流通させることにより、前記背圧室内の圧力を上昇させる一次側副流路と、
前記背圧室から前記液体を前記二次側部に流通させる二次側副流路と、
前記背圧室と前記二次側副流路との遮断と連通との切替えをする副弁と、
前記副弁による前記切替えをするために前記副弁を駆動する副弁駆動部と、を備え、
前記二次側副流路は、前記主弁を迂回するように形成されているパイロット式電磁弁。 Diaphragm part,
A primary side part into which liquid flows into the diaphragm part;
A secondary side from which the liquid from the diaphragm part flows out;
A main valve that configures the diaphragm portion and switches between the primary side portion and the secondary side portion and switching between the communication and the communication;
A back pressure chamber formed on the back side of the main valve on the side where the primary side and the secondary side communicate with each other;
A primary side sub-flow passage formed in the main valve, for increasing the pressure in the back pressure chamber by circulating the liquid from the primary side portion to the back pressure chamber;
A secondary side sub-flow channel for circulating the liquid from the back pressure chamber to the secondary side part;
A sub-valve for switching between shut-off and communication between the back pressure chamber and the secondary side sub-flow channel;
A sub-valve drive unit that drives the sub-valve to perform the switching by the sub-valve,
The secondary side sub-flow path is a pilot-type electromagnetic valve formed so as to bypass the main valve. 前記主弁を収容する本体部を備え、
前記本体部においては、前記二次側副流路が前記本体部の外面と前記本体部が固定される被固定部材との間に形成されるように構成されている請求項１に記載のパイロット式電磁弁。 A main body for housing the main valve;
2. The pilot according to claim 1, wherein the main body portion is configured such that the secondary side sub-channel is formed between an outer surface of the main body portion and a fixed member to which the main body portion is fixed. Type solenoid valve. 前記一次側部に流入する流路と前記二次側部から排出する流路とを備えている前記被固定部材に固定可能に形成されることを特徴とする請求項２に記載のパイロット式電磁弁。   The pilot electromagnetic according to claim 2, wherein the pilot-type electromagnetic wave is formed so as to be fixed to the fixed member having a flow path flowing into the primary side portion and a flow path discharging from the secondary side portion. valve. 前記二次側副流路の上流側の端部には、前記副弁が当接する弁座が設けられ、前記弁座よりも前記二次側副流路の下流側の部分は、徐々に拡径する拡径部を有している請求項１〜請求項３のいずれかに記載のパイロット式電磁弁。   A valve seat with which the secondary valve abuts is provided at the upstream end of the secondary side secondary flow path, and the downstream portion of the secondary side secondary flow path gradually expands from the valve seat. The pilot type solenoid valve according to any one of claims 1 to 3, further comprising a diameter-expanding portion. 前記二次側副流路の上流側の端部には、前記副弁が当接する弁座が設けられ、前記二次側副流路の上流側の端部の開口を形成し前記副弁が当接する前記弁座の開口周縁部は、前記二次側副流路の上流側から下流側に向かって縮径している縮径部を有している請求項１〜請求項４のいずれかに記載のパイロット式電磁弁。   A valve seat with which the secondary valve abuts is provided at the upstream end of the secondary side secondary flow path, forming an opening at the upstream end of the secondary side secondary flow path, and the secondary valve The opening peripheral part of the said valve seat which contact | abuts has a diameter reducing part which is diameter-reduced toward the downstream from the upstream of the said secondary side subchannel. Pilot type solenoid valve described in 1. 前記二次側副流路の上流側の端部には、前記副弁が当接する弁座が設けられ、前記弁座よりも前記二次側副流路の下流側の部分は、拡径する拡径部を有し、
前記二次側副流路の上流側の端部には、前記副弁が当接する弁座が設けられ、前記二次側副流路の上流側の端部の開口を形成し前記副弁が当接する前記弁座の開口周縁部は、前記二次側副流路の上流側から下流側に向かって縮径している縮径部を有し、
前記二次側副流路における前記縮径部の上流端の直径よりも前記拡径部により拡径された大径部の直径の方が大きい請求項１〜請求項３に記載のパイロット式電磁弁。 A valve seat with which the secondary valve abuts is provided at the upstream end of the secondary side secondary flow path, and the downstream side portion of the secondary side secondary flow path is larger in diameter than the valve seat. Having an enlarged diameter part,
A valve seat with which the secondary valve abuts is provided at the upstream end of the secondary side secondary flow path, forming an opening at the upstream end of the secondary side secondary flow path, and the secondary valve The opening peripheral portion of the valve seat that comes into contact has a reduced diameter portion that is reduced in diameter from the upstream side to the downstream side of the secondary side sub-flow channel,
The pilot type electromagnetic according to any one of claims 1 to 3, wherein the diameter of the large diameter portion expanded by the enlarged diameter portion is larger than the diameter of the upstream end of the reduced diameter portion in the secondary side sub-channel. valve. 前記主弁と前記副弁とは、同軸上に配置されている請求項１〜請求項６のいずれかに記載のパイロット式電磁弁。   The pilot solenoid valve according to any one of claims 1 to 6, wherein the main valve and the sub valve are arranged coaxially. 前記主弁を収容する本体部と、
前記副弁が当接する弁座と、を備え、
前記本体部は、前記本体部の径方向に貫通する連通孔を有し、
前記副弁駆動部は、前記副弁を駆動させるコイルを有するコイル部を有し、
前記コイル部は、前記弁座を有する請求項１〜請求項７のいずれかに記載のパイロット式電磁弁。 A main body for housing the main valve;
A valve seat against which the auxiliary valve abuts,
The main body has a communication hole penetrating in the radial direction of the main body,
The auxiliary valve drive unit has a coil part having a coil for driving the auxiliary valve,
The pilot type solenoid valve according to any one of claims 1 to 7, wherein the coil portion includes the valve seat. 前記主弁は、主弁座部に当接して前記一次側部と前記二次側部とを遮断するダイアフラムと、前記ダイアフラムに固定され前記一次側部と前記背圧室とを連通するダイアフラム板とを備え、
前記二次側部への前記二次側副流路の開口は、前記二次側部の前記液体の流れにおける前記ダイアフラム板の下流側の端部よりも上流側に位置している請求項１〜請求項８のいずれかに記載のパイロット式電磁弁。 The main valve is in contact with a main valve seat portion to cut off the primary side portion and the secondary side portion, and a diaphragm plate fixed to the diaphragm and communicating the primary side portion and the back pressure chamber. And
The opening of the secondary side sub-channel to the secondary side portion is located upstream of the downstream end portion of the diaphragm plate in the liquid flow of the secondary side portion. The pilot type solenoid valve according to any one of claims 8 to 9.
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Citations (16)

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JPS4877416A (en) * 1972-01-18 1973-10-18
US4535805A (en) * 1983-04-21 1985-08-20 Emerson Electric Co. Pilot operated valve with pressure relief
JPS6315886U (en) * 1986-07-15 1988-02-02
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JPH10115382A (en) * 1996-08-23 1998-05-06 A & K Mueller Gmbh & Co Kg Solenoid valve
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JPH11294619A (en) * 1998-04-06 1999-10-29 Techno Excel Co Ltd Normally opening pilot type solenoid valve
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WO2003056222A1 (en) * 2001-12-28 2003-07-10 Ode Officine Di Esino Lario S.R.L. Solenoid valve for sanitary equipment
JP2004069045A (en) * 2002-06-13 2004-03-04 Tgk Co Ltd Solenoid valve
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JP2011074967A (en) * 2009-09-29 2011-04-14 Toto Ltd Main valve separation type electromagnetic valve and automatic faucet
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JP7090449B2 (en) 2022-06-24
CN110785598B (en) 2021-11-30
CN110785598A (en) 2020-02-11

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