JPH0514055Y2 - - Google Patents
Info
- Publication number
- JPH0514055Y2 JPH0514055Y2 JP1985046654U JP4665485U JPH0514055Y2 JP H0514055 Y2 JPH0514055 Y2 JP H0514055Y2 JP 1985046654 U JP1985046654 U JP 1985046654U JP 4665485 U JP4665485 U JP 4665485U JP H0514055 Y2 JPH0514055 Y2 JP H0514055Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve seat
- valve body
- check
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- 238000011144 upstream manufacturing Methods 0.000 description 9
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
Classifications
-
- 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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/031—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member the hinge being flexible
-
- 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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded
-
- 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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
- F16K15/1821—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for check valves with a hinged or pivoted closure member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Toilet Supplies (AREA)
Description
【考案の詳細な説明】
（利用分野）
本考案は、水回路に挿入する逆止弁に関するも
のであり、給湯器等のように、凍結防止用の逃し
弁を具備する回路に有効に採用できるものであ
り、しかも、逆止感度が敏感で且流れのない状態
では常時開弁状態に置かれるようにするものであ
る。[Detailed description of the invention] (Field of application) The present invention relates to a check valve inserted into a water circuit, and can be effectively adopted in a circuit equipped with a relief valve to prevent freezing, such as in a water heater. Moreover, the check sensitivity is sensitive and the valve is always kept open in a state where there is no flow.
（従来技術及びその問題点）
給水回路、給湯回路には、水道回路側への逆流
を防止する趣旨から、逆止弁が組み込まれ、この
種の逆止弁として、第３図に示すような形式のも
のが採用される。(Prior art and its problems) Check valves are incorporated in water supply circuits and hot water supply circuits for the purpose of preventing backflow to the water supply circuit side. The format will be adopted.
このものは、流路の下流側に弁体１１を設け
て、その上流側に弁座１２を形成したもので、こ
の弁座の上流側が負圧状態になると、弁体１１
が、この時の圧力差によつて弁座１２に圧接さ
れ、弁座１２の上流側（例えば水道配管）への逆
流が阻止される。 In this device, a valve body 11 is provided on the downstream side of the flow path, and a valve seat 12 is formed on the upstream side thereof. When the upstream side of this valve seat becomes a negative pressure state, the valve body 11
However, due to the pressure difference at this time, the valve seat 12 is pressed against the valve seat 12, and backflow to the upstream side of the valve seat 12 (for example, water pipes) is prevented.
ところが、この従来のものでは、弁座１２の上
流側と下流側との間に圧力差が生じない状態、す
なわち、自然状態では、弁体１１が弁座１２に当
接した状態にあつて逆流方向の流路は遮断されて
いる。 However, in this conventional device, in a state where no pressure difference occurs between the upstream side and the downstream side of the valve seat 12, that is, in the natural state, the valve body 11 is in contact with the valve seat 12, and backflow occurs. The flow path in the direction is blocked.
従つて、給湯器の水系統の配管等にこの逆止弁
が組み込まれたものでは、凍結防止のためにこの
配管内が水抜きされたとき、弁体１１と弁座１２
との接触部分に水が付着残存し、凍結温度に雰囲
気温度が降下すると、前記付着残存水が凍結して
弁体１１と弁座１２が凍り付き、再使用時には前
記凍結水が融けるまで逆止弁が開弁せず、使用不
能となる。これは、自然状態において弁体１１が
閉弁状態にあるからである。 Therefore, when this check valve is built into the piping of the water system of a water heater, when water is drained from the piping to prevent freezing, the valve body 11 and valve seat 12
If water remains attached to the contact area and the atmospheric temperature drops to freezing temperature, the remaining water will freeze and the valve body 11 and valve seat 12 will freeze. The valve does not open and becomes unusable. This is because the valve body 11 is in a closed state in its natural state.
かかる不都合を防止するために、特開昭57−
101176号公報には、補助逆止弁の構造として、弁
体１１をバネによつて常時開弁方向に付勢したも
のが開示されている。ところが、この先行技術の
ものでは、自然状態において、開弁状態に維持さ
れるものの、流量の多い条件下での逆止性能が不
十分となるとともに、逆止感度が鈍感であるとい
う不都合が残る。 In order to prevent such inconvenience,
Japanese Patent No. 101176 discloses a structure of an auxiliary check valve in which the valve body 11 is always urged in the valve-opening direction by a spring. However, with this prior art, although the valve is maintained in the open state in the natural state, the check performance under high flow conditions is insufficient and the check sensitivity remains insensitive. .
弁体１１が軸線方向に摺動する形式であること
から、摺動軸線の触れが生じ易く移動の滑らかさ
に欠けるからであり、さらに、バネによつて開弁
維持力を確保する形式では、前記維持力を極端に
は小さく設定できず、逆止動作時における閉弁作
用力が比較的大きくなるからである。 This is because the valve body 11 is of a type that slides in the axial direction, so the sliding axes tend to touch and the movement lacks smoothness.Furthermore, in a type where the valve body 11 is kept open by a spring, This is because the maintaining force cannot be set extremely small, and the valve closing force during the check operation becomes relatively large.
（技術的課題）
本考案は、凍結条件下で水抜きした場合に、逆
止弁が閉弁状態のままで凍り付く不都合を防止で
きるようにすると共に、逆止性能を向上させ、さ
らに、逆止感度を敏感にできるようにすることを
その課題とする。(Technical Issues) The present invention prevents the inconvenience of the check valve freezing in the closed state when water is drained under freezing conditions, improves the check performance, and further improves the check valve's non-return performance. The challenge is to make it more sensitive.
（手段）
上記課題を解決するために講じた本考案の技術
的手段は、『本体１内の流路を水平方向に設定し、
前記水平流路に対して弁座１２の構成平面が斜め
に交叉するように当該弁座１２を形成し、前記弁
座１２の上端をその下端に対して僅かに下流側に
位置さるとともに、弁体１１を揺動弁とするとと
もに、その揺動支点を前記弁座１２の上端近傍の
下流側に配設した』ことである。(Means) The technical means of the present invention taken to solve the above-mentioned problems is to ``set the flow path in the main body 1 in a horizontal direction,
The valve seat 12 is formed so that the plane of the valve seat 12 obliquely intersects the horizontal flow path, and the upper end of the valve seat 12 is located slightly downstream of the lower end thereof, and the valve The body 11 is a swinging valve, and its swinging fulcrum is arranged downstream near the upper end of the valve seat 12.
（作用）
本考案の上記技術的手段は次のように作用す
る。(Operation) The above technical means of the present invention operates as follows.
弁座１２の上流側と下流側との間に圧力差がな
い場合には、弁体１１は自由状態にある。この弁
体１１は、揺動弁となつており、しかも、その揺
動支点が上端に配設されているから、この支点か
ら弁体１１がその自重によつて下方に垂下した状
態にある。 When there is no pressure difference between the upstream side and the downstream side of the valve seat 12, the valve body 11 is in a free state. This valve body 11 is a swinging valve, and since its swinging fulcrum is disposed at the upper end, the valve body 11 hangs downward from this fulcrum due to its own weight.
一方、弁座１２は、上端が下端に対して僅かに
下流側に位置するように弁座１２の構成平面が傾
斜しており、この弁座１２の上端近傍下流側に弁
体１１の前記支点を配設している。従つて、弁体
１１が上記のように自由状態にあるときには弁体
１１と弁座１２との間には一定の間隙が生じてい
る。しかも、この間隙は、流路の下部となる弁座
１２の下端側で大きくなる。 On the other hand, the plane of the valve seat 12 is inclined so that the upper end is located slightly downstream of the lower end, and the fulcrum of the valve body 11 is located downstream near the upper end of the valve seat 12. has been set up. Therefore, when the valve body 11 is in the free state as described above, a certain gap is created between the valve body 11 and the valve seat 12. Moreover, this gap becomes larger at the lower end side of the valve seat 12, which is the lower part of the flow path.
この状態において、下流側への流れが生じる
と、弁体１１が大きく開放した状態となり、上流
側への逆流方向の流れが生じると弁体１１の自重
による開弁力に抗して弁体１１が弁座１２に対接
されて、閉弁する。 In this state, when a downstream flow occurs, the valve body 11 becomes wide open, and when a reverse flow toward the upstream side occurs, the valve body 11 resists the valve-opening force due to its own weight. is brought into contact with the valve seat 12 and the valve is closed.
このとき、弁体１１の閉弁に要する作用力は、
弁体１１の自重による開弁力に抗する力、すなわ
ち、前記自重によつて生じる揺動方向の回転力に
抗する作用力だけであるから、極小さな作用力と
なる。 At this time, the acting force required to close the valve body 11 is:
Since it is only the force that resists the valve-opening force due to the weight of the valve body 11, that is, the force that resists the rotational force in the swinging direction generated by the weight, the force is extremely small.
（効果）
本考案は上記構成であるから、次の特有の効果
を有する。(Effects) Since the present invention has the above configuration, it has the following unique effects.
弁体１１が自由状態にあるときには、これが開
弁状態に置かれるから、弁座１２の上流側の逃し
弁から配管内の水を排出する場合にも、この逆止
弁の上流側の残存水を確実に排出できる。 When the valve body 11 is in the free state, it is in the open state, so even when water in the pipe is discharged from the relief valve on the upstream side of the valve seat 12, the remaining water on the upstream side of this check valve is removed. can be discharged reliably.
逆止時における弁体１１の閉弁作用力は、極小
さなものとなるから、逆止感度が敏感である。 Since the valve-closing force of the valve body 11 at the time of non-return is extremely small, the non-return sensitivity is sensitive.
また、揺動によつて弁体１１が開閉するもので
あるから、弁体１１の開閉動作が円滑であり、逆
止性能が向上する。 Further, since the valve body 11 is opened and closed by swinging, the opening and closing operation of the valve body 11 is smooth, and the check performance is improved.
さらに、弁座１２から弁体１１への通路にはバ
ネが介在しないから、弁体１１と弁座１２との間
にゴミや異物が詰る心配がない。 Furthermore, since no spring is interposed in the passage from the valve seat 12 to the valve body 11, there is no fear that dirt or foreign matter will become clogged between the valve body 11 and the valve seat 12.
（実施例）
第１図に示す第１実施例は、弁体１１の自重に
よる付勢力で弁体１１がその自由状態において、
弁座１２と一定の間隙を有するようにしたもので
あり、本体１内の流路１３は入口１４から出口１
５に向つて水平方向に設定される。弁座１２は流
路１３の軸線に対して直角な方向から僅かに傾斜
するように設けられ、弁座１２は下流側に向つて
斜め下方に向く。(Embodiment) In the first embodiment shown in FIG.
It is designed to have a certain gap with the valve seat 12, and the flow path 13 in the main body 1 runs from the inlet 14 to the outlet 1.
5 in the horizontal direction. The valve seat 12 is provided so as to be slightly inclined from a direction perpendicular to the axis of the flow path 13, and the valve seat 12 faces obliquely downward toward the downstream side.
弁体１１は支点１６を中心にして揺動する形式
で、この支点１６が弁座１２の下流側で且この弁
座の上端近傍に位置する。 The valve body 11 swings about a fulcrum 16, and the fulcrum 16 is located downstream of the valve seat 12 and near the upper end of the valve seat.
このものでは、弁体１１はその自由状態では、
同図のＢの状態にあつて弁座１２との間に一定の
間隙があり、通常使用状態では、弁体１１は流れ
に伴つて同図Ｃの状態に全開せしめられ、上流側
が低圧となつた状態（逆流条件）では、弁体１１
が弁座１２に対接せしめられて、同図Ａのように
閉弁する。 In this case, the valve body 11 is in its free state,
In the state shown in B in the same figure, there is a certain gap between the valve body 11 and the valve seat 12, and in normal use, the valve body 11 is fully opened in the state shown in C in the same figure with the flow, and the upstream side becomes low pressure. In this state (reverse flow condition), the valve body 11
is brought into contact with the valve seat 12, and the valve is closed as shown in FIG.
この逆止弁１０を、第２図の如く、給湯器の水
回路２の元弁２０の下流側に挿入すると共に、水
抜き弁２１を前記逆止弁１０の下流側に挿入した
回路構成では、元弁２０が閉弁された器具の不使
用時に水抜き弁２１を開弁させると、水回路２が
水抜きされる。このとき、弁体１１が第１図のＢ
の状態にあつて、弁体１１と弁座１２との間に間
隙ができることとなり、既述の効果が得られる。 In a circuit configuration in which the check valve 10 is inserted downstream of the main valve 20 of the water circuit 2 of the water heater, and the drain valve 21 is inserted downstream of the check valve 10, as shown in FIG. When the drain valve 21 is opened when the appliance is not in use with the main valve 20 closed, water is drained from the water circuit 2. At this time, the valve body 11 is
In this state, a gap is created between the valve body 11 and the valve seat 12, and the above-mentioned effects can be obtained.
上記実施例では、給湯器の水回路に挿入してい
るが、これを他の機器の水回路の逆止弁として利
用できることは言うまでもない。 In the above embodiment, it is inserted into the water circuit of a water heater, but it goes without saying that it can be used as a check valve in the water circuit of other equipment.
第１図は本考案実施例の断面図、第２図はこれ
を用いた給湯器の概略説明図、第３図は従来例の
説明図であり、図中１……本体、１０……逆止
弁、１１……弁体、１２……弁座、１６……支
点、１７……バネ。
Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a schematic explanatory view of a water heater using this, and Fig. 3 is an explanatory view of a conventional example. Stop valve, 11...valve body, 12...valve seat, 16...fulcrum, 17...spring.
Claims (1)
流路に対して弁座１２の構成平面が斜めに交叉す
るように当該弁座１２を形成し、前記弁座１２の
上端をその下端に対して僅かに下流側に位置さ
せ、弁体１１を揺動弁とすると共に、その揺動始
点を前記弁座１２の上端近傍の下流側に配設し、
前記弁体が自由状態にあるときには弁体１１と弁
座１２との間に間隙が生じるようにした逆止弁。 The flow path in the main body 1 is set in the horizontal direction, and the valve seat 12 is formed so that the plane of the valve seat 12 obliquely intersects with the horizontal flow path, and the upper end of the valve seat 12 is connected to the lower end thereof. , the valve body 11 is a swinging valve, and its swinging start point is located downstream near the upper end of the valve seat 12;
A check valve in which a gap is created between a valve body 11 and a valve seat 12 when the valve body is in a free state.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985046654U JPH0514055Y2 (en) | 1985-03-28 | 1985-03-28 | |
| KR2019860002650U KR890004849Y1 (en) | 1985-03-28 | 1986-03-06 | Check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985046654U JPH0514055Y2 (en) | 1985-03-28 | 1985-03-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61161479U JPS61161479U (en) | 1986-10-06 |
| JPH0514055Y2 true JPH0514055Y2 (en) | 1993-04-14 |
Family
ID=30561257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985046654U Expired - Lifetime JPH0514055Y2 (en) | 1985-03-28 | 1985-03-28 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0514055Y2 (en) |
| KR (1) | KR890004849Y1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5234484B2 (en) * | 2007-06-28 | 2013-07-10 | Ｔｏｔｏ株式会社 | Air bleed structure of flush toilet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4995530U (en) * | 1972-12-08 | 1974-08-17 | ||
| JPS5127329U (en) * | 1974-08-20 | 1976-02-27 |
-
1985
- 1985-03-28 JP JP1985046654U patent/JPH0514055Y2/ja not_active Expired - Lifetime
-
1986
- 1986-03-06 KR KR2019860002650U patent/KR890004849Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR860012055U (en) | 1986-10-08 |
| JPS61161479U (en) | 1986-10-06 |
| KR890004849Y1 (en) | 1989-07-25 |
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