JPH073101Y2 - Check valve - Google Patents
Check valveInfo
- Publication number
- JPH073101Y2 JPH073101Y2 JP1988117078U JP11707888U JPH073101Y2 JP H073101 Y2 JPH073101 Y2 JP H073101Y2 JP 1988117078 U JP1988117078 U JP 1988117078U JP 11707888 U JP11707888 U JP 11707888U JP H073101 Y2 JPH073101 Y2 JP H073101Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve body
- support body
- clip ring
- valve seat
- 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
- 238000012856 packing Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000013049 sediment Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Check Valves (AREA)
Description
【考案の詳細な説明】 本考案は、例えば水道の本管工事等で断水したような場
合でも、配管末端に設置された水槽等の内部の水が、本
管側に逆流するのを防止する、逆流防止弁に関するもの
である。[Detailed Description of the Invention] The present invention prevents the water inside a water tank or the like installed at the end of a pipe from flowing back to the main pipe side even if the water is cut off due to, for example, a main work of a water supply. , A check valve.
従来の逆流防止弁は弁箱の内壁を案内とし、弁体の内壁
あるいは弁体に深溝をもうけて水の流路としたものが一
般的であった。この種の逆流防止弁は、長年使用してい
ると弁箱の底に細かい土砂等が沈殿し、案内の機能が損
なわれ、逆流防止弁の用をなさなくなるという欠点があ
った。In the conventional check valve, the inner wall of the valve box is used as a guide, and a deep groove is formed in the inner wall of the valve body or the valve body to form a water flow path. This type of check valve has a drawback that if it has been used for many years, fine earth and sand will settle on the bottom of the valve box, impairing the function of the guide, and the check valve will no longer be used.
上記欠点を除去するものとしては、例えば同一出願人に
よる実願昭59−113226号がある。これは第１図に示す様
に、弁箱１の弁座２に密着する弁体３の下流側に、細径
で円柱状のガイド部４を延長してもうけ、第２図に示す
ように、外周部５を円形にし、同心状に上記ガイド部４
を保持できるよう、内側をくの字と逆くの字に折り曲げ
て保持部６を形成した、一本の弾性線材からなるクリッ
プリング７を、弁箱１の２ヶ所にもうけた円形内溝８、
８′に容易には離脱しないよう装着し、上記２個のクリ
ップリングに保持されて弁体３は弁箱の中心軸上を移動
しうるようにしたものである。このため、弁箱の底に土
砂等が沈殿、付着したとしても、弁体の動作には何ら悪
影響を及ぼさず、そのため、非常に耐久性の良い逆流防
止弁が実現できたわけであるが、しかし、引用例のもの
は、ガイド部４の外周部とクリップリング７の保持部６
内壁との間に大きな寸法差を有せしめることができず、
また、クリップリング７を円形内溝８、８′に装着する
ときは、クリップリング７を内側にすぼめるようにして
弁箱１に挿入しなければならないため、組み立てが非常
に困難になり、クリップリング７の寸法精度も要求され
る、という欠点があり、さらには、弁体３を弁座２に押
圧するためのばねの台座を形成することができず、弁体
３は常時は図のように弁座２から離脱した状態になって
いるため、弱い負圧が発生したときには弁体３が弁座２
を閉塞しない恐れもでてくる、という欠点があった。そ
のため、本考案においては、上記引用例の長所は残しつ
つ、組み立ても容易でばねを有する逆流防止弁を提供す
ることを目的としており、第２図のクリップリングを１
本弁箱に装着し、上記クリップリングの保持部に、一部
に大径のつば部を有する円筒形の支持体を保持させ、上
記つば部に支持されたばねに押圧される弁体のガイド部
が、支持体内を弁箱の中心軸にそって自由に移動しうる
ようにしたものである。For example, Japanese Patent Application No. 59-113226 by the same applicant can eliminate the above-mentioned drawbacks. As shown in FIG. 1, a guide portion 4 having a small diameter and a cylindrical shape is provided on the downstream side of the valve body 3 that is in close contact with the valve seat 2 of the valve box 1, and as shown in FIG. , The outer peripheral portion 5 is circular and the guide portion 4 is concentrically formed.
A circular inner groove 8 provided at two points of the valve box 1 with a clip ring 7 made of a single elastic wire in which the holding portion 6 is formed by bending the inside into a dogleg shape to hold the ,
It is attached to 8'to prevent it from being easily separated, and is held by the two clip rings so that the valve body 3 can move on the central axis of the valve box. For this reason, even if sediment, etc., settles and adheres to the bottom of the valve box, it does not have any adverse effect on the operation of the valve body, and as a result, a very durable check valve can be realized. In the reference example, the outer peripheral portion of the guide portion 4 and the holding portion 6 of the clip ring 7 are used.
It is not possible to make a large dimensional difference with the inner wall,
Further, when the clip ring 7 is mounted in the circular inner grooves 8 and 8 ', the clip ring 7 must be inserted in the valve box 1 so as to be recessed inward, which makes the assembly very difficult, There is a drawback that the dimensional accuracy of the ring 7 is also required. Further, the base of the spring for pressing the valve body 3 against the valve seat 2 cannot be formed, and the valve body 3 is always as shown in the figure. Since the valve seat 3 has been separated from the valve seat 2, the valve body 3 will move to the valve seat 2 when a weak negative pressure is generated.
There was a drawback that there was a fear that it would not block. Therefore, in the present invention, it is an object of the present invention to provide a check valve having a spring that is easy to assemble and retains the advantages of the above-described reference example.
The guide part of the valve body, which is mounted on the valve box, holds the cylindrical support having a large-diameter collar part in the retaining part of the clip ring and is pressed by the spring supported by the collar part. However, it is designed so that it can freely move in the support body along the central axis of the valve box.
以下、本考案を図面に掲げる実施例に即して説明する。The present invention will be described below with reference to the embodiments shown in the drawings.
第１図において弁箱１は、図面左方向の上流側から順に
流入口９、シリンダ状の弁座２、係止部10、膨出空間部
11、円形溝部８、流出口12をそれぞれ形成する。弁体３
は左端に球面部13を、その下流側溝部に環状パッキン14
を装着し、さらにその下流側に弁座２より大径のストッ
パー部15および細径円柱状のガイド部４を形成する。弁
箱の円形溝部８には第２図のクリップリング７が装着さ
れており、上記クリップリング７に、保持部６をやや拡
開して挿入する程度の外径を有し、一部に大径のつば部
16を有する円筒形の支持体17が保持される。上記支持体
17の内径は、弁体３がスムーズに、しかもほぼ中心軸上
を移動できる程度に、ガイド４の外径よりやや大径に形
成する。18はばねであり、支持体17のつば部16に係止さ
れ、弁体３に常に左方向への押圧力を与えるようにして
いる。図は配管末端に設けた蛇口を閉じた状態を示して
いるが、蛇口を開くと、圧力差により弁体３はばね18を
圧縮して後退し、流入口９からの水は弁座２内周、膨出
空間部11、弁体３の間隙、クリップリング７の間隙を通
って流出口12側へと流れる。蛇口を閉じたとき、または
本管側に負圧が生じたときには、負圧の強弱に関係な
く、ばね18の復元力により瞬時に弁体３は左方に移動
し、環状パッキン14が弁座12に密着して逆流を防止す
る。係止部10はテーパー面となっており、弁体３は先端
に球面部13を形成しているため、弁体３が弁箱１の軸心
から多少ずれて弁座２内に侵入してきても、係止部10で
すべりを起こし、スムーズにＯリング14が弁座２を閉塞
できるものである。弁座２の内周よりもストッパー部15
の外径を大きくしているため、それ以上弁体３は左方に
移動することはない。実施例のものを組み立てる際に
は、まず弁箱１に弁体３、ばね18、支持体17を入れ、ば
ね18を圧縮して支持体17を図より左方に移動させた状態
でクリップリング７をすぼめるようにして弁箱に挿入
し、円形内溝８に装着する。その後で左方から弁体３を
押圧してクリップリング７の保持部６を拡開するように
して支持体17をクリップリング７に保持させる。クリッ
プリング７はばね弾性により支持体をしっかり保持し、
また、ばね10に押圧されたつば部16にも係止されて、容
易に支持体17を離脱させないようにしている。取り外す
ときは、逆に右方から支持体17を押圧し、クリップリン
グ７から外れた状態で、クリップリング７をすぼめるよ
うにして弁箱１から外せば良い。弁体３はできるだけ軽
くして、自重により弁体３が軸心からずれて移動するの
を防止し、合わせて係止部10に球面部13が当接してもす
べりやすくするため、プラスチックで形成するのが望ま
しく、また支持体17も温度変化による膨張収縮を考える
と、ガイド部４と支持体17間に一定の寸法差を有せしめ
ておくために同一のプラスチックを使用することが望ま
しい。以上、第３図示の実施例について説明してきた
が、この他にも例えば第４図に示すように、弁箱１に小
半円状の弁座２をもうけ、弁体３に平パッキン14を装着
したり、円形内溝８の断面形状を半丸状でなく角状にし
たり、クリップリング７の保持部６を第５図のように円
形状に形成するなど本考案の要旨を逸脱しない程度の設
計変更は自由である。In FIG. 1, the valve box 1 includes an inflow port 9, a cylindrical valve seat 2, a locking portion 10, and a bulging space portion in order from the upstream side in the left direction of the drawing.
11, the circular groove portion 8 and the outlet 12 are formed respectively. Disc 3
Is the spherical portion 13 at the left end and the annular packing 14 in the downstream groove portion.
Then, a stopper portion 15 having a diameter larger than that of the valve seat 2 and a guide portion 4 having a thin cylindrical shape are formed on the downstream side. The clip ring 7 of FIG. 2 is mounted in the circular groove portion 8 of the valve box. The clip ring 7 has an outer diameter that allows the holding portion 6 to be slightly expanded and inserted, and has a large diameter in part. Diameter collar
A cylindrical support 17 having 16 is retained. The above support
The inner diameter of 17 is formed to be slightly larger than the outer diameter of the guide 4 so that the valve body 3 can smoothly move on the central axis. Reference numeral 18 denotes a spring, which is locked to the flange portion 16 of the support body 17 so as to always apply a pressing force to the left side to the valve body 3. The figure shows the state in which the faucet provided at the end of the pipe is closed, but when the faucet is opened, the valve body 3 compresses the spring 18 and retracts due to the pressure difference, and the water from the inflow port 9 is stored inside the valve seat 2. Flows to the outlet 12 side through the circumference, the bulging space 11, the gap of the valve body 3, and the gap of the clip ring 7. When the faucet is closed or when a negative pressure is generated on the main pipe side, the valve body 3 instantaneously moves to the left by the restoring force of the spring 18 regardless of the strength of the negative pressure, and the annular packing 14 causes the valve seat 14 to move. Close to 12 to prevent backflow. Since the locking portion 10 has a tapered surface and the valve body 3 has a spherical portion 13 formed at the tip thereof, the valve body 3 is slightly displaced from the axis of the valve box 1 and enters the valve seat 2. Also, the locking portion 10 causes a slip, and the O-ring 14 can smoothly close the valve seat 2. Stopper part 15 than the inner circumference of valve seat 2
Since the outer diameter of the valve body 3 is increased, the valve body 3 does not move to the left any more. When assembling the example, first, the valve body 3, the spring 18, and the support body 17 are put in the valve box 1, and the spring 18 is compressed to move the support body 17 to the left side in the drawing. 7 is inserted into the valve box so as to be narrowed, and mounted in the circular inner groove 8. After that, the valve body 3 is pressed from the left side to expand the holding portion 6 of the clip ring 7 so that the support body 17 is held by the clip ring 7. The clip ring 7 holds the support firmly by spring elasticity,
Further, it is also locked to the collar portion 16 pressed by the spring 10 so that the support body 17 is not easily separated. On the contrary, when detaching, the support 17 may be pressed from the right side, and in a state where it is detached from the clip ring 7, the clip ring 7 may be recessed and detached from the valve box 1. The valve element 3 should be made as light as possible to prevent the valve element 3 from moving from its axis due to its own weight, and also made of plastic to make it easier to slip even if the spherical portion 13 comes into contact with the locking portion 10. In consideration of expansion / contraction of the support body 17 due to temperature change, it is desirable to use the same plastic to keep a certain dimensional difference between the guide portion 4 and the support body 17. Although the embodiment shown in FIG. 3 has been described above, in addition to this, as shown in FIG. 4, for example, a small semicircular valve seat 2 is provided in the valve box 1 and a flat packing 14 is attached to the valve body 3. The inner shape of the circular inner groove 8 may be rectangular rather than semi-circular, and the holding portion 6 of the clip ring 7 may be formed in a circular shape as shown in FIG. 5 without departing from the gist of the present invention. Design changes are free.
以上のように本考案においては、弁箱内壁をガイドにし
て弁体は移動しないため、土砂等の沈殿により弁体の案
内機能を損なわれるという恐れもなく、耐久性に富んで
いる上、組み立て、分解も容易で、ばねを有しているの
で本管側の弱い負圧で逆流が生ずるという恐れの全くな
い、逆流防止弁を提供できるものである。As described above, in the present invention, since the valve body does not move by using the inner wall of the valve box as a guide, there is no fear that the guiding function of the valve body will be impaired by sedimentation of sediment, etc. It is possible to provide a check valve which is easy to disassemble, and has no spring, which causes no back flow due to a weak negative pressure on the main pipe side.
第１図は従来の実施例を示す縦断面図であり、第２図は
従来例および本考案に使用されるクリップリングの縦断
面図であり、第３図は本考案の一実施例を示す縦断面図
であり、第４図は本考案の他の実施例を示す部分縦断面
図であり、第５図は本考案クリップリングの他の実施例
を示す縦断面図である。 １は弁箱、２は弁座、３は弁体、４はガイド部、５は外
周部、６は保持部、７はクリップリング、８は円形内
溝、９は流入口、11は膨出空間部、12は流出口、14はパ
ッキン、16はつば部、17は支持体、18はばねをそれぞれ
示している。FIG. 1 is a vertical sectional view showing a conventional embodiment, FIG. 2 is a vertical sectional view of a clip ring used in the conventional example and the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a vertical sectional view, FIG. 4 is a partial vertical sectional view showing another embodiment of the present invention, and FIG. 5 is a vertical sectional view showing another embodiment of the clip ring of the present invention. 1 is a valve box, 2 is a valve seat, 3 is a valve body, 4 is a guide part, 5 is an outer peripheral part, 6 is a holding part, 7 is a clip ring, 8 is a circular inner groove, 9 is an inlet, 11 is a bulge. A space portion, 12 is an outlet, 14 is a packing, 16 is a brim portion, 17 is a support, and 18 is a spring.
Claims (1)
円形内溝、流出口を同一軸心上に形成する弁箱と、上記
円形内溝に嵌合する外周部を有し、実質的に弁箱の中心
線上に円筒を保持しうる保持部を有する、一本の線材か
らなるクリップリングと、上記保持部により保持され
た、一部に大径のつば部を有する円筒形の支持体と、上
記弁座に密着するパッキンを装着し、上記支持体内を摺
動する細径のガイド部を有する弁体と、上記支持体のつ
ば部に支持されて上記弁体に押圧力を与えるばねとから
なる逆流防止弁。1. An inlet, a valve seat, a bulging space,
A circular inner groove, a valve box having an outlet formed on the same axis, and an outer peripheral portion that fits in the circular inner groove, and a holding portion capable of holding a cylinder substantially on the center line of the valve box. , A clip ring made of a single wire, a cylindrical support body having a large-diameter collar portion partially held by the holding portion, and packing closely attached to the valve seat are attached to the support body. A check valve comprising a valve body having a small-diameter guide portion that slides on a valve, and a spring that is supported by a flange portion of the support body and applies a pressing force to the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988117078U JPH073101Y2 (en) | 1988-09-05 | 1988-09-05 | Check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988117078U JPH073101Y2 (en) | 1988-09-05 | 1988-09-05 | Check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0238575U JPH0238575U (en) | 1990-03-14 |
| JPH073101Y2 true JPH073101Y2 (en) | 1995-01-30 |
Family
ID=31360203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988117078U Expired - Lifetime JPH073101Y2 (en) | 1988-09-05 | 1988-09-05 | Check valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073101Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009014169A (en) * | 2007-07-09 | 2009-01-22 | Bridgestone Flowtech Corp | Fitting with valve and valve support for fitting with valve |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0716947Y2 (en) * | 1991-04-10 | 1995-04-19 | 株式会社光合金製作所 | Check valve with intake valve |
| JP5461240B2 (en) * | 2010-03-03 | 2014-04-02 | 株式会社ブリヂストン | Fitting with valve and valve support for fitting with valve |
| JP2014066347A (en) * | 2012-09-27 | 2014-04-17 | Hitachi Metals Techno Ltd | Release valve and hydraulic damper |
| JP6137547B2 (en) * | 2013-01-07 | 2017-05-31 | イーグル工業株式会社 | Relief valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6129172U (en) * | 1984-07-24 | 1986-02-21 | 株式会社 光合金製作所 | backflow prevention valve |
| JPH0319648Y2 (en) * | 1986-05-07 | 1991-04-25 |
-
1988
- 1988-09-05 JP JP1988117078U patent/JPH073101Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009014169A (en) * | 2007-07-09 | 2009-01-22 | Bridgestone Flowtech Corp | Fitting with valve and valve support for fitting with valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0238575U (en) | 1990-03-14 |
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