JP6954791B2 - Pilot type water supply valve - Google Patents

Pilot type water supply valve Download PDF

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JP6954791B2
JP6954791B2 JP2017175079A JP2017175079A JP6954791B2 JP 6954791 B2 JP6954791 B2 JP 6954791B2 JP 2017175079 A JP2017175079 A JP 2017175079A JP 2017175079 A JP2017175079 A JP 2017175079A JP 6954791 B2 JP6954791 B2 JP 6954791B2
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pilot
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JP2019052651A (en
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重樹 武部
重樹 武部
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Rinnai Corp
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Description

本発明は、水を使用する機器に設けられるパイロット式給水弁に関する。 The present invention relates to a pilot type water supply valve provided in a device that uses water.

この種のパイロット式給水弁は、水が流入する流入口と、水が流出する流出口と、筒状の主弁座と、流入口に連通する、主弁座を囲う流入室と、流出口に連通する、主弁座で囲われる流出室とを有する弁筐と、主弁座の軸方向に対向させた状態で流入室を覆うように設けられ、主弁座から離隔したときに流入室と流出室とを連通させ、主弁座に着座したときに流入室と流出室との連通を遮断するダイヤフラム弁と、ダイヤフラム弁の主弁座とは反対の背面側に蓋部材によって画成される背圧室と、背圧室を流入口から流入室までの流入側経路に連通させるイコライザ通路と、背圧室を流出口から流出室までの流出側経路に連通させるパイロット通路と、パイロット通路を開通、遮断する電磁弁から成るパイロット弁とを備えている。このものでは、パイロット弁を閉弁させて、パイロット通路を遮断すると、流入側経路からイコライザ通路を介して背圧室に流入する水が背圧室に封じ込められ、背圧室の内圧上昇によりダイヤフラム弁が主弁座に着座、即ち、閉弁して止水される。また、パイロット弁を開弁させて、パイロット通路を開通させると、背圧室内の水がパイロット通路を介して流出側経路に流出し、背圧室の内圧低下によりダイヤフラム弁が主弁座から離隔、即ち、開弁して給水される。 This type of pilot water supply valve has an inflow port for water to flow in, an outflow port for water to flow out, a tubular main valve seat, an inflow chamber that communicates with the inflow port and surrounds the main valve seat, and an outflow port. A valve housing having an outflow chamber surrounded by a main valve seat, which communicates with the main valve seat, is provided so as to cover the inflow chamber so as to face the main valve seat in the axial direction, and when separated from the main valve seat, the inflow chamber is provided. A diaphragm valve that communicates with the outflow chamber and blocks communication between the inflow chamber and the outflow chamber when seated on the main valve seat, and a lid member on the back side opposite to the main valve seat of the diaphragm valve. Back pressure chamber, equalizer passage that connects the back pressure chamber to the inflow side path from the inflow port to the inflow chamber, a pilot passage that connects the back pressure chamber to the outflow side path from the outflow port to the outflow chamber, and a pilot passage. It is equipped with a pilot valve consisting of a solenoid valve that opens and shuts off. In this case, when the pilot valve is closed and the pilot passage is shut off, the water flowing into the back pressure chamber from the inflow side passage through the equalizer passage is confined in the back pressure chamber, and the diaphragm is increased due to the increase in the internal pressure of the back pressure chamber. The valve is seated on the main valve seat, that is, the valve is closed and the water is stopped. When the pilot valve is opened to open the pilot passage, the water in the back pressure chamber flows out to the outflow side path through the pilot passage, and the diaphragm valve is separated from the main valve seat due to the decrease in the internal pressure of the back pressure chamber. That is, the valve is opened and water is supplied.

従来、このようなパイロット式給水弁において、主弁座の軸方向が水平になる姿勢で弁筐を配置するものも知られている（例えば、特許文献１参照）。 Conventionally, in such a pilot type water supply valve, there is also known that the valve housing is arranged in a posture in which the axial direction of the main valve seat is horizontal (see, for example, Patent Document 1).

ところで、パイロット式給水弁は、通水して各種検査を行った後、水抜きすると共に水抜きの最後にパイロット弁を開弁させた状態でエアブローを行って出荷される。ここで、主弁座の軸方向が水平になる姿勢で弁筐が配置されていると、イコライザ通路と同レベル以下の背圧室の部分に水が残った状態で出荷される場合がある。そして、出荷から使用開始までの期間が長いと、背圧室内の残水が腐ってスライムが発生し、イコライザ通路がスライムによって目詰まりしてしまうことがある。すると、背圧室にイコライザ通路を介して水が流入しなくなるため、パイロット弁を閉弁しても、背圧室の内圧が上昇せず、ダイヤフラム弁が閉弁されずに止水不良を生ずる。 By the way, the pilot type water supply valve is shipped by passing water through various inspections, draining the water, and finally performing an air blow with the pilot valve opened at the end of the drainage. Here, if the valve housing is arranged so that the axial direction of the main valve seat is horizontal, water may remain in the back pressure chamber portion equal to or lower than the equalizer passage. If the period from shipment to the start of use is long, the residual water in the back pressure chamber may rot and slime may be generated, and the equalizer passage may be clogged with slime. Then, water does not flow into the back pressure chamber through the equalizer passage. Therefore, even if the pilot valve is closed, the internal pressure of the back pressure chamber does not rise, and the diaphragm valve is not closed, resulting in poor water stoppage. ..

特開２００９−２８７７００号公報Japanese Unexamined Patent Publication No. 2009-287700

本発明は、以上の点に鑑み、主弁座の軸方向が水平になる姿勢で弁筐を配置しても、スライムに起因する止水不良の発生を防止できるようにしたパイロット式給水弁を提供することをその課題としている。 In view of the above points, the present invention provides a pilot type water supply valve capable of preventing the occurrence of water stoppage failure due to slime even if the valve housing is arranged in a posture in which the axial direction of the main valve seat is horizontal. The challenge is to provide it.

上記課題を解決するために、本発明は、水が流入する流入口と、水が流出する流出口と、筒状の主弁座と、流入口に連通する、主弁座を囲う流入室と、流出口に連通する、主弁座で囲われる流出室とを有する弁筐と、主弁座の軸方向に対向させた状態で流入室を覆うように設けられ、主弁座から離隔したときに流入室と流出室とを連通させ、主弁座に着座したときに流入室と流出室との連通を遮断するダイヤフラム弁と、ダイヤフラム弁の主弁座とは反対の背面側に蓋部材によって画成される背圧室と、背圧室を流入口から流入室までの流入側経路に連通させるイコライザ通路と、背圧室を流出口から流出室までの流出側経路に連通させるパイロット通路と、パイロット通路を開通、遮断する電磁弁から成るパイロット弁とを備えるパイロット式給水弁であって、主弁座の軸方向が水平になる所定姿勢で弁筐が配置可能なものにおいて、イコライザ通路として、第１イコライザ通路と、弁筐が前記所定姿勢のときに第１イコライザ通路よりも下方になる位置で背圧室に連通する第２イコライザ通路とが設けられ、第１イコライザ通路と第２イコライザ通路は、パイロット弁の開弁時に背圧室からパイロット通路を介して流出側経路に流出する水量よりも流入側経路から第１と第２の両イコライザ通路を介して背圧室に流入する水量が少なくなるように形成され、第２イコライザ通路は、弁筐が前記所定姿勢のときに蓋部材の下端になる部分に形成した孔を介して背圧室に連通するように構成されることを特徴とする。 In order to solve the above problems, the present invention provides an inflow port for water to flow in, an outflow port for water to flow out, a tubular main valve seat, and an inflow chamber surrounding the main valve seat which communicates with the inflow port. , A valve housing having an outflow chamber surrounded by the main valve seat, which communicates with the outflow port, and an inflow chamber are provided so as to face the main valve seat in the axial direction and are separated from the main valve seat. A diaphragm valve that communicates the inflow chamber and the outflow chamber and cuts off the communication between the inflow chamber and the outflow chamber when seated on the main valve seat, and a lid member on the back side opposite to the main valve seat of the diaphragm valve. A defined back pressure chamber, an equalizer passage that connects the back pressure chamber to the inflow side path from the inflow port to the inflow chamber, and a pilot passage that connects the back pressure chamber to the outflow side path from the outflow port to the outflow chamber. , A pilot type water supply valve including a pilot valve composed of an electromagnetic valve that opens and shuts off the pilot passage, in which the valve housing can be arranged in a predetermined posture in which the axial direction of the main valve seat is horizontal, as an equalizer passage. , A first equalizer passage and a second equalizer passage communicating with the back pressure chamber at a position below the first equalizer passage when the valve housing is in the predetermined posture are provided, and the first equalizer passage and the second equalizer passage are provided. The passage is the amount of water flowing into the back pressure chamber from the inflow side path through both the first and second equalizer passages rather than the amount of water flowing out from the back pressure chamber to the outflow side path through the pilot passage when the pilot valve is opened. It is formed so that fewer, the second equalizer passageway, a Rukoto is configured valve housing communicates with the back pressure chamber through a hole formed in the areas of the lower end of the lid member when said predetermined position It is a feature.

本発明によれば、弁筐を前記所定姿勢で配置しても、検査工程後の水抜き及びエアブローで第２イコライザ通路の連通箇所より上方の背圧室の部分の水は確実に排出される。そのため、出荷から使用開始までの間に背圧室内の残水が腐ってスライムが発生して、第２イコライザ通路の目詰まりを生じても、第２イコライザ通路より上方位置で背圧室に連通する第１イコライザ通路は目詰まりしない。その結果、流入側経路から第１イコライザ通路を介して背圧室に流入する水により、パイロット弁の閉弁時に背圧室の内圧が確実に上昇してダイヤフラム弁が閉弁し、止水不良の発生を防止できる。 According to the present invention, even if the valve housing is arranged in the predetermined posture, the water in the back pressure chamber above the communication point of the second equalizer passage is surely discharged by draining water and air blowing after the inspection process. .. Therefore, even if the residual water in the back pressure chamber rots and slime is generated between the time of shipment and the start of use, and the second equalizer passage is clogged, the back pressure chamber is communicated at a position above the second equalizer passage. The first equalizer passage is not clogged. As a result, the water flowing into the back pressure chamber from the inflow side passage through the first equalizer passage surely raises the internal pressure of the back pressure chamber when the pilot valve is closed, and the diaphragm valve is closed, resulting in poor water stoppage. Can be prevented.

尚、第１と第２の両イコライザ通路を設けても、両イコライザ通路を介して背圧室に流入する水量がパイロット通路を介して流出側経路に流出する水量よりも少ないため、パイロット弁の開弁時には背圧室の内圧が低下してダイヤフラム弁が開弁し、給水不良を生じない。 Even if both the first and second equalizer passages are provided, the amount of water flowing into the back pressure chamber through both equalizer passages is smaller than the amount of water flowing out to the outflow side path through the pilot passage, so that the pilot valve When the valve is opened, the internal pressure of the back pressure chamber drops and the diaphragm valve opens, so that water supply failure does not occur.

また、本発明において、第２イコライザ通路は、上記の如く、弁筐が前記所定姿勢のときに蓋部材の下端になる部分に形成した孔を介して背圧室に連通するように構成されるため、弁筐を前記所定姿勢で配置しても、背圧室内の残水量を可及的に少なくすることができ、衛生的である。 Further, in the present invention, as described above , the second equalizer passage is configured to communicate with the back pressure chamber through a hole formed in the lower end portion of the lid member when the valve housing is in the predetermined posture. Therefore, be arranged valve housing at the predetermined position, it is possible to reduce the residual water in the back pressure chamber as much as possible, it is hygienic.

本発明の実施形態のパイロット式給水弁の切断側面図。The cut side view of the pilot type water supply valve of embodiment of this invention.

図１は、水を使用する機器、例えば、給湯装置に、浴槽に湯張りする湯張り弁等として設けられる本発明の実施形態のパイロット式給水弁を示している。このパイロット式給水弁の弁筐１は、水が流入する流入口１１ａと、水が流出する流出口１２ａと、筒状の主弁座１３と、流入口１１ａに連通する、主弁座１３を囲う流入室１１ｂと、流出口１２ａに連通する、主弁座１３で囲われる流出室１２ｂとを有している。尚、弁筐１は、主弁座１３の軸方向が水平になり、流入口１１ａが下方を向く所定姿勢で配置される。 FIG. 1 shows a pilot-type water supply valve according to an embodiment of the present invention, which is provided as a hot water filling valve for filling a bathtub in a device using water, for example, a hot water supply device. The valve housing 1 of the pilot type water supply valve has an inflow port 11a into which water flows in, an outflow port 12a in which water flows out, a cylindrical main valve seat 13, and a main valve seat 13 communicating with the inflow port 11a. It has an inflow chamber 11b that surrounds it, and an outflow chamber 12b that communicates with the outflow port 12a and is surrounded by a main valve seat 13. The valve housing 1 is arranged in a predetermined posture in which the axial direction of the main valve seat 13 is horizontal and the inflow port 11a faces downward.

また、パイロット式給水弁は、主弁座１３の軸方向に対向させた状態で流入室１１ｂを覆うように設けられたダイヤフラム弁２と、ダイヤフラム弁２の主弁座１３とは反対の背面側に蓋部材３によって画成される背圧室４とを備えている。そして、ダイヤフラム弁２が主弁座１３から離隔して開弁したときに、流入室１１ｂと流出室１２ｂとが連通して給水され、また、ダイヤフラム弁２が主弁座１３に着座して閉弁したときに、流入室１１ｂと流出室１２ｂとの連通が遮断されて止水されるようにしている。 Further, the pilot type water supply valve has a diaphragm valve 2 provided so as to cover the inflow chamber 11b in a state of facing the main valve seat 13 in the axial direction, and a rear side opposite to the main valve seat 13 of the diaphragm valve 2. It is provided with a back pressure chamber 4 defined by a lid member 3. Then, when the diaphragm valve 2 is separated from the main valve seat 13 and opened, the inflow chamber 11b and the outflow chamber 12b are communicated with each other to supply water, and the diaphragm valve 2 is seated on the main valve seat 13 and closed. When the valve is valved, the communication between the inflow chamber 11b and the outflow chamber 12b is cut off so that the water is stopped.

ダイヤフラム弁２は、主体となるダイヤフラム２１と、ダイヤフラム２１の中央部背面に取付けられた硬質ディスク２２とで構成されている。ダイヤフラム２１の周縁部は、背面側から蓋部材３の周縁部で押え付けられている。硬質ディスク２２には、ダイヤフラム２１を貫通して主弁座１３に挿入可能なガイド突起２２ａが形成されると共に、蓋部材３の内面に突設したピン部３１が内挿される背面のガイド凹孔２２ｂが形成され、ダイヤフラム弁２が傾き等を生ずることなく主弁座１３の軸方向に変位するようにしている。 The diaphragm valve 2 is composed of a main diaphragm 21 and a hard disk 22 attached to the back surface of the central portion of the diaphragm 21. The peripheral edge of the diaphragm 21 is pressed from the back surface by the peripheral edge of the lid member 3. The hard disk 22 is formed with a guide protrusion 22a that penetrates the diaphragm 21 and can be inserted into the main valve seat 13, and a guide recessed hole on the back surface into which a pin portion 31 projecting from the inner surface of the lid member 3 is inserted. 22b is formed so that the diaphragm valve 2 is displaced in the axial direction of the main valve seat 13 without causing inclination or the like.

パイロット式給水弁は、更に、背圧室４を流入口１１ａから流入室１１ｂまでの流入側経路１１に連通させる後述するイコライザ通路と、背圧室４を流出口１２ａから流出室１２ｂまでの流出側経路１２に連通させるパイロット通路６と、パイロット通路６を開通、遮断する電磁弁から成るパイロット弁７とを備えている。パイロット弁７を閉弁させて、パイロット通路６を遮断すると、流入側経路１１からイコライザ通路を介して背圧室４に流入する水が背圧室４に封じ込められ、背圧室４の内圧上昇によりダイヤフラム弁２が閉弁（主弁座１３に着座）し、また、パイロット弁７を開弁させて、パイロット通路６を開通させると、背圧室４内の水がパイロット通路６を介して流出側経路１２に流出し、背圧室４の内圧低下によりダイヤフラム弁２が開弁（主弁座１３から離隔）する。 The pilot type water supply valve further includes an equalizer passage described later for communicating the back pressure chamber 4 with the inflow side path 11 from the inflow port 11a to the inflow chamber 11b, and an outflow of the back pressure chamber 4 from the outflow port 12a to the outflow chamber 12b. A pilot passage 6 communicating with the side passage 12 and a pilot valve 7 including an electromagnetic valve that opens and shuts off the pilot passage 6 are provided. When the pilot valve 7 is closed and the pilot passage 6 is shut off, the water flowing into the back pressure chamber 4 from the inflow side path 11 via the equalizer passage is confined in the back pressure chamber 4, and the internal pressure of the back pressure chamber 4 rises. When the diaphragm valve 2 is closed (seat on the main valve seat 13) and the pilot valve 7 is opened to open the pilot passage 6, the water in the back pressure chamber 4 passes through the pilot passage 6. It flows out to the outflow side passage 12, and the diaphragm valve 2 opens (separates from the main valve seat 13) due to a decrease in the internal pressure of the back pressure chamber 4.

パイロット通路６は、蓋部材３の上端部（弁筐１が上記所定姿勢のときに蓋部材３の上端になる部分）に形成した、背圧室４に連通する溝６１と、弁筐１に形成した、溝６１から水平にのびる上流側の孔６２と、同じく弁筐１に形成した、孔６２に交差して下方にのび、流出側経路１２の一部たる流出室１２ｂに連通する下流側の孔６３とで構成されている。 The pilot passage 6 is formed in the upper end portion of the lid member 3 (the portion that becomes the upper end portion of the lid member 3 when the valve housing 1 is in the predetermined posture), and the groove 61 communicating with the back pressure chamber 4 and the valve housing 1. The formed upstream hole 62 extending horizontally from the groove 61 and the downstream side that intersects the formed hole 62 and extends downward and communicates with the outflow chamber 12b that is a part of the outflow side path 12. It is composed of a hole 63 of the above.

パイロット弁７は、上流側の孔６２と下流側の孔６３との交差部に設けられた弁室７１と、弁室７１の孔６３との連通部に設けられた弁座７２と、弁室７１に設けられた弁座７２に対向する弁体７３と、弁体７３を連結したプランジャ７４ａを有する電磁ソレノイド７４とで構成されている。常時は弁体７３が弁座７２に着座して、パイロット弁７が閉弁されており、パイロット通路６が遮断される。そして、電磁ソレノイド７４に通電したときに、弁体７３が弁座７２から離隔してパイロット弁７が開弁され、パイロット通路６が開通する。 The pilot valve 7 includes a valve chamber 71 provided at the intersection of the upstream hole 62 and the downstream hole 63, a valve seat 72 provided at a communication portion between the valve chamber 71 and the hole 63, and a valve chamber. It is composed of a valve body 73 facing the valve seat 72 provided on the 71 and an electromagnetic solenoid 74 having a plunger 74a connected to the valve body 73. At all times, the valve body 73 is seated on the valve seat 72, the pilot valve 7 is closed, and the pilot passage 6 is shut off. Then, when the electromagnetic solenoid 74 is energized, the valve body 73 is separated from the valve seat 72, the pilot valve 7 is opened, and the pilot passage 6 is opened.

ところで、パイロット式給水弁を組み込んだ機器の製造後は、通水して各種検査を行い、その後で水抜きすると共に水抜きの最後にパイロット弁７を開弁させた状態でエアブローを行って出荷される。ここで、本実施形態の如く弁筐１が上記所定姿勢（主弁座１３の軸方向が水平になる姿勢）で配置されていると、イコライザ通路と同レベル以下の背圧室４の部分に、水が残った状態で出荷される場合がある。そして、出荷から使用開始までの期間が長いと、背圧室４内の残水が腐ってスライムが発生し、イコライザ通路がスライムによって目詰まりする可能性がある。 By the way, after manufacturing the equipment incorporating the pilot type water supply valve, water is passed through and various inspections are performed, and then the water is drained and the pilot valve 7 is opened at the end of the drainage and the air blow is performed before shipping. Will be done. Here, when the valve housing 1 is arranged in the above-mentioned predetermined posture (the posture in which the axial direction of the main valve seat 13 is horizontal) as in the present embodiment, the back pressure chamber 4 is located at the same level as or lower than the equalizer passage. , It may be shipped with water remaining. If the period from shipment to the start of use is long, the residual water in the back pressure chamber 4 may rot and slime may be generated, and the equalizer passage may be clogged with slime.

そこで、本実施形態では、イコライザ通路として、第１イコライザ通路５１と、弁筐１が上記所定姿勢のときに第１イコライザ通路５１よりも下方になる位置で背圧室４に連通する第２イコライザ通路５２とを設けている。ここで、第１イコライザ通路５１は、背圧室４を流入側経路１１の一部たる流入室１１ｂに連通するようにダイヤフラム弁２に形成した孔で構成されている。また、第２イコライザ通路５２は、蓋部材３の下端部（弁筐１が上記所定姿勢のときに蓋部材３の下端になる部分）に形成した、背圧室４に連通する孔５１と、弁筐１に形成した、孔５１を流入側経路１１の一部たる流入口１１ａと流入室１１ｂとの間の通路部分に連通する孔５２とで構成されている。尚、孔５１は、蓋部材３の下端部に、背圧室４の下端から下方にのびるように形成した孔部５１ａと、この孔部５１ａに交差して孔５２に連通するように水平にのびる孔部５１ｂとで構成されている。また、孔部５１ａの下端は、蓋部材３の外面に開口するため、栓体５１ｃで閉塞されている。 Therefore, in this embodiment, as an equalizer passageway, a first equalizer passage 5 1, the valve housing 1 communicates with the back pressure chamber 4 at a first position where the below equalizer passage 5 to 1 when the predetermined posture 2 Equalizer passage 5 2 is provided. The first equalizer passage 5 1 is constituted by holes formed in the diaphragm valve 2 so as to communicate the back pressure chamber 4 to the part serving inflow chamber 11b of the inlet-side path 11. The second equalizer passage 5 2 has a lower end portion of the lid member 3 (valve housing 1 is areas of the lower end of the lid member 3 when the predetermined orientation) was formed, the hole 51 communicating with the back pressure chamber 4 , The hole 51 formed in the valve housing 1 is composed of a hole 52 that communicates the hole 51 with the passage portion between the inflow port 11a, which is a part of the inflow side path 11, and the inflow chamber 11b. The hole 51 is horizontally formed at the lower end of the lid member 3 so as to extend downward from the lower end of the back pressure chamber 4 so as to intersect the hole 51a and communicate with the hole 52. It is composed of an extending hole portion 51b. Further, the lower end of the hole 51a is closed by the plug 51c because it opens to the outer surface of the lid member 3.

上記の如く弁筐１が上記所定姿勢のときに第１イコライザ通路５１よりも下方になる位置で背圧室４に連通する第２イコライザ通路５２を設ければ、弁筐１を上記所定姿勢で配置しても、検査工程後の水抜き及びエアブローで第２イコライザ通路５２の連通箇所より上方の背圧室４の部分の水は確実に排出される。そのため、出荷から使用開始までの間に背圧室４内の残水が腐ってスライムが発生し、第２イコライザ通路５２の目詰まりを生じても、第２イコライザ通路５２より上方位置で背圧室４に連通する第１イコライザ通路５１は目詰まりしない。その結果、流入側経路１１から第１イコライザ通路５１を介して背圧室４に流入する水により、パイロット弁７の閉弁時に背圧室４の内圧が確実に上昇してダイヤフラム弁２が閉弁し、止水不良の発生を防止できる。更に、蓋部材３の下端部に形成した孔５１を介して背圧室４に連通するように第２イコライザ通路５２を構成しているため、背圧室４内の残水量を可及的に少なくすることができ、衛生的である。 By providing the valve housing 1 as described above is the second equalizer passage 5 2 first than equalizer passage 5 1 which communicates with the back pressure chamber 4 at a position where the downward when the predetermined posture, the predetermined the valve housing 1 be placed in position, the water portion of the back pressure chamber 4 above the second communicating portion of the equalizer passage 5 2 drainage and air blowing after the inspection process is reliably discharged. In Therefore, slime is generated rotten water remaining in the back pressure chamber 4 until the start of use of shipping, even if the second clogging of the equalizer passage 5 2, upper position than the second equalizer passage 5 2 first equalizer passage 5 1 which communicates with the back pressure chamber 4 is not clogged. As a result, the water flowing from the inflow side passage 11 to the first back pressure chamber 4 through the equalizer passage 5 1, diaphragm valve 2 by the internal pressure of the back pressure chamber 4 is surely increased when the valve is closed the pilot valve 7 The valve can be closed to prevent the occurrence of poor water stoppage. Furthermore, since constituting the second equalizer passage 5 2 so as to communicate with the back pressure chamber 4 through a hole 51 formed in the lower end portion of the lid member 3, as much as possible the residual amount of water back pressure chamber 4 It can be reduced and is hygienic.

また、第１イコライザ通路５１と第２イコライザ通路５２は、パイロット弁７の開弁時に背圧室４からパイロット通路６を介して流出側経路１２に流出する水量よりも流入側経路１１から第１と第２の両イコライザ通路５１，５２を介して背圧室４に流入する水量が少なくなるように形成されている。そのため、第１と第２の両イコライザ通路５１，５２を設けても、パイロット弁７の開弁時には背圧室４の内圧が低下してダイヤフラム弁２が開弁し、給水不良を生じない。 The first equalizer passage 5 1 and the second equalizer passage 5 2 from the inflow side passage 11 than the amount of water flowing out to the outflow side passage 12 from the back pressure chamber 4 during the opening of the pilot valve 7 through the pilot passage 6 amount of water flowing into the back pressure chamber 4 through the first and second two equalizer passage 5 1, 5 2 are formed to be less. Therefore, even when provided, both the first and the second equalizer passage 5 1, 5 2, diaphragm valve 2 is opened to decrease the internal pressure of the back pressure chamber 4 at the time of opening of the pilot valve 7 causes a water supply failure No.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、上記実施形態では、パイロット通路６を弁筐１に形成した上流側と下流側の孔６２，６３を経由して背圧室４と流出室１２ｂとを連通するように構成しているが、パイロット通路６の流出側経路１２に対する連通箇所は、流出室１２ｂと流出口１２ａとの間の通路部分であってもよい。また、ダイヤフラム弁２の中央部に背圧室４と流出室１２ｂとを連通するように形成する孔でパイロット通路を構成することも可能である。この場合、パイロット弁は、背圧室４内でダイヤフラム弁２の中央部の孔開設箇所に対向する弁体を備えるものとすればよい。 Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, in the above embodiment, the back pressure chamber 4 and the outflow chamber 12b are configured to communicate with each other via the upstream and downstream holes 62 and 63 formed in the valve housing 1 by the pilot passage 6. The communication point of the pilot passage 6 with respect to the outflow side path 12 may be a passage portion between the outflow chamber 12b and the outflow port 12a. Further, it is also possible to form a pilot passage with a hole formed in the central portion of the diaphragm valve 2 so as to communicate the back pressure chamber 4 and the outflow chamber 12b. In this case, the pilot valve may be provided with a valve body facing the hole opening portion in the central portion of the diaphragm valve 2 in the back pressure chamber 4.

更に、第１イコライザ通路５１と第２イコライザ通路５２との間で背圧室４に連通するように第３のイコライザ通路を設けてもよい。また、弁筐１に、流入室１１ｂとパイロット通路６の上流側の孔６２とを連通する孔を形成し、この孔で第１イコライザ通路を構成することも可能である。 Furthermore, there may be provided a third equalizer passage so as to communicate with the back pressure chamber 4 between the first equalizer passage 5 1 and the second equalizer passage 5 2. Further, it is also possible to form a hole in the valve housing 1 for communicating the inflow chamber 11b and the hole 62 on the upstream side of the pilot passage 6, and to form the first equalizer passage with this hole.

１…弁筐、１１…流入側経路、１１ａ…流入口、１１ｂ…流入室、１２…流出側経路、１２ａ…流出口、１２ｂ…流出室、１３…主弁座、２…ダイヤフラム弁、３…蓋部材、４…背圧室、５１…第１イコライザ通路、５２…第２イコライザ通路、５１…蓋部材の下端部に形成した孔、６…パイロット通路、７…パイロット弁。
1 ... valve housing, 11 ... inflow side path, 11a ... inflow port, 11b ... inflow chamber, 12 ... outflow side path, 12a ... outflow port, 12b ... outflow chamber, 13 ... main valve seat, 2 ... diaphragm valve, 3 ... cover member, 4 ... back pressure chamber, 5 1 ... first equalizer passageway, 5 2 ... second equalizer passageway 51 ... hole formed in the lower end portion of the lid member, 6 ... pilot passage, 7 ... pilot valve.

Claims (1)

水が流入する流入口と、水が流出する流出口と、筒状の主弁座と、流入口に連通する、主弁座を囲う流入室と、流出口に連通する、主弁座で囲われる流出室とを有する弁筐と、主弁座の軸方向に対向させた状態で流入室を覆うように設けられ、主弁座から離隔したときに流入室と流出室とを連通させ、主弁座に着座したときに流入室と流出室との連通を遮断するダイヤフラム弁と、ダイヤフラム弁の主弁座とは反対の背面側に蓋部材によって画成される背圧室と、背圧室を流入口から流入室までの流入側経路に連通させるイコライザ通路と、背圧室を流出口から流出室までの流出側経路に連通させるパイロット通路と、パイロット通路を開通、遮断する電磁弁から成るパイロット弁とを備えるパイロット式給水弁であって、主弁座の軸方向が水平になる所定姿勢で弁筐が配置可能なものにおいて、
イコライザ通路として、第１イコライザ通路と、弁筐が前記所定姿勢のときに第１イコライザ通路よりも下方になる位置で背圧室に連通する第２イコライザ通路とが設けられ、第１イコライザ通路と第２イコライザ通路は、パイロット弁の開弁時に背圧室からパイロット通路を介して流出側経路に流出する水量よりも流入側経路から第１と第２の両イコライザ通路を介して背圧室に流入する水量が少なくなるように形成され、
第２イコライザ通路は、弁筐が前記所定姿勢のときに蓋部材の下端になる部分に形成した孔を介して背圧室に連通するように構成されることを特徴とするパイロット式給水弁。 An inflow port where water flows in, an outflow port where water flows out, a tubular main valve seat, an inflow chamber that communicates with the inflow port and surrounds the main valve seat, and a main valve seat that communicates with the outflow port. A valve housing having an outflow chamber is provided so as to cover the inflow chamber so as to face the main valve seat in the axial direction, and the inflow chamber and the outflow chamber are communicated with each other when separated from the main valve seat. A diaphragm valve that blocks communication between the inflow chamber and the outflow chamber when seated on the valve seat, a back pressure chamber defined by a lid member on the back side opposite to the main valve seat of the diaphragm valve, and a back pressure chamber. Consists of an equalizer passage that communicates with the inflow side path from the inflow port to the inflow chamber, a pilot passage that communicates the back pressure chamber with the outflow side path from the outflow port to the outflow chamber, and an electromagnetic valve that opens and shuts off the pilot passage. In a pilot type water supply valve equipped with a pilot valve, in which the valve housing can be arranged in a predetermined posture in which the axial direction of the main valve seat is horizontal.
As the equalizer passage, a first equalizer passage and a second equalizer passage communicating with the back pressure chamber at a position lower than the first equalizer passage when the valve housing is in the predetermined posture are provided, and the first equalizer passage and the first equalizer passage are provided. The second equalizer passage is from the inflow side passage to the back pressure chamber via both the first and second equalizer passages rather than the amount of water flowing out from the back pressure chamber to the outflow side passage through the pilot passage when the pilot valve is opened. Formed to reduce the amount of water flowing in ,
The second equalizer passage, pilot-water supply valve, characterized in Rukoto is configured valve housing communicates with the back pressure chamber through a hole formed in the areas of the lower end of the lid member when said predetermined position.
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JPH07224966A (en) * 1994-02-15 1995-08-22 K I Denshi Kk Solenoid valve for water
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