JPS639825Y2

JPS639825Y2 -

Info

Publication number: JPS639825Y2
Application number: JP9108684U
Authority: JP
Priority date: 1984-06-19
Filing date: 1984-06-19
Publication date: 1988-03-23
Also published as: JPS616084U

Description

【考案の詳細な説明】（産業上の利用分野）本考案は例えば瞬間湯沸器に適用される水バル
ブ装置に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a water valve device applied to, for example, an instantaneous water heater.

（従来の技術）従来この種装置として、例えば実公昭53−2329
に見られるように、弁筐内に主弁孔を開閉する主
弁と、該主弁に形成される副弁孔を開閉する副弁
とを備えて常時は該主弁がその背側の圧力室内に
導かれる水圧に押されて閉じるようにした式のも
のにおいて、該副弁をその背側の緩衝室内に微少
間隙を介して嵌合させて所謂ダツシユポツトを構
成させ、かくて該主弁の急激な閉弁によるウオー
タハンマ作用を防止するようにした式のものは知
られるが、かゝるものでは該緩衝室は比較的高い
加工精度を必要として比較的高価となるを免れな
い。(Prior art) Conventionally, as this type of device, for example,
As seen in the figure, the main valve is equipped with a main valve that opens and closes the main valve hole in the valve casing, and a sub-valve that opens and closes the sub-valve hole formed in the main valve. In a type of valve that closes when pushed by water pressure introduced into the chamber, the sub-valve is fitted into the buffer chamber on the back side of the sub-valve through a small gap to form a so-called doss pot, and the main valve is closed. Types of valves designed to prevent the water hammer effect caused by sudden valve closing are known, but in such systems, the buffer chamber requires relatively high machining accuracy and is relatively expensive.

（考案が解決しようとする問題点）本考案はかゝる不都合のない装置を得ることを
その目的とする。(Problems to be Solved by the Invention) The object of the present invention is to obtain a device free from such inconveniences.

（問題点を解決するための手段）本考案はかゝる観点に基きなされたもので、弁
筐内に主弁孔を開閉する主弁と、該主弁に形成さ
れる副弁孔を開閉する副弁とを備えて常時は該主
弁がその背側の圧力室内に導かれる水圧に押され
て閉じるようにした式のものにおいて、該主弁の
外周面に、該弁筐の内周面との間にリング溝内の
Ｏリングを介在させると共に、該リング溝の深さ
を該Ｏリングの径に比して大きくして成る。(Means for solving the problem) The present invention was made based on such a viewpoint, and includes a main valve that opens and closes the main valve hole in the valve casing, and a sub-valve hole that opens and closes the auxiliary valve hole formed in the main valve. In the case of a type in which the main valve is normally closed by being pushed by the water pressure introduced into the pressure chamber on the back side, the main valve is provided with a sub-valve, and the inner circumference of the valve casing is An O-ring in a ring groove is interposed between the ring groove and the surface, and the depth of the ring groove is larger than the diameter of the O-ring.

（実施例）本考案実施の１例を別紙図面に付説明する。(Example) An example of implementing the present invention will be explained with reference to attached drawings.

図面で１は弁筐、２はその流入口、３はその流
出口を示し、該弁筐１内に主弁孔４を開閉する主
弁５と、該主弁５に形成される副弁孔６を開閉す
る副弁７とを備えた該主弁５を常時はその外周の
隙間８内を介してその背側の圧力室９内に導かれ
る水圧に押されて閉じるようにした。尚該副弁７
は前方にのびるプツシユロツド１０により背面の
ばね１１に抗して開く型式とする。 In the drawings, 1 is a valve housing, 2 is an inlet thereof, and 3 is an outlet thereof. Inside the valve housing 1, there is a main valve 5 for opening and closing the main valve hole 4, and a sub-valve hole formed in the main valve 5. The main valve 5, which is provided with a sub-valve 7 for opening and closing the main valve 6, is normally closed by the pressure of water guided into the pressure chamber 9 on the back side of the main valve through a gap 8 on its outer periphery. Furthermore, the sub-valve 7
is of a type that opens against a spring 11 on the back side by means of a push rod 10 extending forward.

以上は従来のものと特に異らないが、本考案に
よれば、該主弁５の外周面に、該弁筐１の内周面
との間に、環状のリング溝１２を介してＯリング
１３を介在させて該Ｏリング１３により該主弁５
にダンパ作用を与えるようにし、これを換言すれ
ば、該主弁５の急激な開弁によるウオータハンマ
の発生を防止するようにし、更にかゝるものでは
例えば低水圧の場合、該隙間８内を介して該圧力
室９内に水が導かれないことが考えられるので、
これを防止すべく、該リング溝１２の深さを該リ
ング１３の径ｄよりも大きくして該リング１３は
必要に応じ該リング溝１２内に容易に変形してそ
の外周を介して水を導き得るようにした。尚、図
示のものでは、その変形を更に容易にすべく、該
リング溝１２内はその底部を連通孔１４を介して
該圧力室９内に連通されるようにした。 Although the above is not particularly different from the conventional one, according to the present invention, an O-ring is inserted between the outer circumferential surface of the main valve 5 and the inner circumferential surface of the valve housing 1 via an annular ring groove 12. The main valve 5 is connected by the O-ring 13 with the O-ring 13 interposed therebetween.
In other words, water hammer is prevented from occurring due to the sudden opening of the main valve 5, and in such a case, for example, in the case of low water pressure, the water hammer inside the gap 8 Since it is conceivable that water is not introduced into the pressure chamber 9 via
In order to prevent this, the depth of the ring groove 12 is made larger than the diameter d of the ring 13 so that the ring 13 can easily deform into the ring groove 12 as needed and drain water through its outer periphery. I made it possible to guide you. In the illustrated embodiment, the bottom of the ring groove 12 is communicated with the pressure chamber 9 through a communication hole 14 in order to facilitate its deformation.

（作用）その作動を説明するに、該主弁５は常時は該圧
力室９内の水圧に押されて閉じると共に、該副弁
７を開けば該水圧から解除されてその前面に作用
する水圧に押されて開くもので、この点は従来の
ものと特に異らないが、かゝる作動に際し、その
外周の該Ｏリング１３は該弁筐１の内周面との間
の摺動抵抗により所謂ダンパ作用を営み、かくて
その急激な閉弁によるウオータハンマの発生を無
くすることが出来、更に該リング１３は該リング
溝１２内に容易に変形し、かくて低水圧の場合に
おいてもその外周の隙間８を介して水を導かせる
ことが出来る。(Function) To explain its operation, the main valve 5 is normally closed by the water pressure in the pressure chamber 9, and when the sub-valve 7 is opened, it is released from the water pressure and the water pressure acts on its front surface. The O-ring 13 on the outer periphery of the O-ring 13 creates sliding resistance between the inner circumferential surface of the valve housing 1 and the inner circumferential surface of the valve housing 1 during such operation. The ring 13 performs a so-called damper action, thus eliminating the occurrence of water hammer due to the sudden valve closing.Furthermore, the ring 13 is easily deformed into the ring groove 12, so even in the case of low water pressure. Water can be guided through the gap 8 on the outer periphery.

（効果）このように本考案によるときは、主弁５の外周
に、リング溝１２を介してＯリング１３を備える
もので、これにダンパ作用を与えてウオータハン
マの発生をなくすことが出来、従来のダツシユポ
ツト式のものに比しその構成を簡単にすることが
出来、更に該リング溝１２はその深さを該リング
１３の径に比し大とするもので、該リング１３は
比較的容易に内周方向の変形して低水圧の場合に
おいてもその外周を介して水を導かせることが出
来る等の効果を有する。(Effects) According to the present invention, the O-ring 13 is provided on the outer periphery of the main valve 5 via the ring groove 12, and it is possible to provide a damping effect to this and eliminate the occurrence of water hammer. The structure can be simplified compared to the conventional dart pot type, and furthermore, the ring groove 12 has a depth larger than the diameter of the ring 13, so the ring 13 can be assembled relatively easily. It has the effect of being able to deform in the inner circumferential direction and guide water through its outer circumference even in the case of low water pressure.

[Brief explanation of drawings]

第１図は本案装置の１例の閉弁状態の截断側面
図、第２図はその開弁状態の截断側面図である。１……弁筐、４……主弁孔、５……主弁、６…
…副弁孔、７……副弁、８……隙間、９……圧力
室、１２……リング溝、１３……Ｏリング、１４
……連通孔。 FIG. 1 is a cut-away side view of one example of the present device in a valve-closed state, and FIG. 2 is a cut-away side view of an example of the device in its valve-open state. 1...Valve housing, 4...Main valve hole, 5...Main valve, 6...
... Sub-valve hole, 7... Sub-valve, 8... Gap, 9... Pressure chamber, 12... Ring groove, 13... O-ring, 14
...Communication hole.

Claims

[Claims for Utility Model Registration] 1. A main valve that opens and closes a main valve hole in a valve casing, and a auxiliary valve that opens and closes a auxiliary valve hole formed in the main valve, and the main valve is normally connected to the back of the main valve. In a type that closes by being pushed by water pressure guided into a pressure chamber on the side, an O-ring in a ring groove is interposed between the outer circumferential surface of the main valve and the inner circumferential surface of the valve casing. ,
A water valve device in which the depth of the ring groove is larger than the diameter of the O-ring. 2. The water valve device according to claim 1, wherein the inside of the ring groove communicates with the pressure chamber through a communication hole.