JPH08338564A - Check valve device - Google Patents
Check valve deviceInfo
- Publication number
- JPH08338564A JPH08338564A JP7171509A JP17150995A JPH08338564A JP H08338564 A JPH08338564 A JP H08338564A JP 7171509 A JP7171509 A JP 7171509A JP 17150995 A JP17150995 A JP 17150995A JP H08338564 A JPH08338564 A JP H08338564A
- Authority
- JP
- Japan
- Prior art keywords
- check valve
- valve body
- pressure relief
- water
- seat portion
- 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.)
- Pending
Links
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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は水栓に用いて好適な逆
止弁装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve device suitable for use in faucets.
【０００２】[0002]
【従来の技術】従来より、水栓には逆止弁装置が設けら
れており、水栓から給水源側へ、また或いは給湯源側へ
の水又は湯（以下単に水とする）の逆流が防止されてい
る。図８はその逆止弁装置の一例を示している。図８に
おいて、２００はカウンター等の水栓取付体の下側に配
置され、取付体上に設置された水栓本体に対して水又は
湯を供給するサプライ管で、内部に通水路２０２を有し
ている。そしてその通水路２０２上に、給水源から水栓
本体側に向かう水の流れのみを許容し、逆方向の流れを
阻止する逆止弁装置２０４が設けられている。2. Description of the Related Art Conventionally, a check valve device is provided in a faucet to prevent backflow of water or hot water (hereinafter simply referred to as water) from the faucet to a water source side or a hot water source side. It is prevented. FIG. 8 shows an example of the check valve device. In FIG. 8, reference numeral 200 denotes a supply pipe arranged below the faucet mounting body such as a counter, for supplying water or hot water to the faucet body installed on the mounting body, and having a water passage 202 inside. are doing. A check valve device 204 that allows only the flow of water from the water supply source toward the faucet body and blocks the flow in the opposite direction is provided on the water passage 202.
【０００３】逆止弁装置２０４は、保持スリーブ２０６
を有しており、この保持スリーブ２０６が、有底円筒形
状のキャップ２０８を介して、管体２１０に一体に形成
された円筒状のハウジング２１２にねじ結合され、固定
されている。The check valve device 204 includes a holding sleeve 206.
This holding sleeve 206 is screwed and fixed to a cylindrical housing 212 integrally formed with the tubular body 210 via a cap 208 having a cylindrical shape with a bottom.
【０００４】この逆止弁装置２０４は、保持スリーブ２
０６の内側に配置された逆止弁体２１４と、逆止弁体２
１４に一体に形成された弁棒２１６とを有しており、そ
の弁棒２１６が、保持スリーブ２０６側に固定的に設け
られたガイド部２１８に対して摺動可能に嵌合され、移
動案内されるようになっている。保持スリーブ２０６に
はまた、一端側に弁座部２２０が設けられており、逆止
弁体２１４がこの弁座部２２０に当接する向きにばね部
材２２２によって付勢されている。The check valve device 204 includes a holding sleeve 2
Check valve body 214 disposed inside 06 and the check valve body 2
14 has a valve rod 216 integrally formed therewith, and the valve rod 216 is slidably fitted to a guide portion 218 fixedly provided on the side of the holding sleeve 206 to guide movement. It is supposed to be done. The holding sleeve 206 is also provided with a valve seat portion 220 on one end side, and the check valve body 214 is biased by a spring member 222 in a direction to come into contact with the valve seat portion 220.
【０００５】以上のように通例、水栓の設置に当っては
通水路上に逆止弁装置が設けられ、逆流防止されるが、
一方このように逆止弁装置を設けることにより、水栓閉
止時にウォーターハンマーが惹起され易いといった問題
がある。As described above, when installing a faucet, a check valve device is usually provided on the water passage to prevent backflow.
On the other hand, by providing the check valve device in this way, there is a problem that a water hammer is easily caused when the faucet is closed.
【０００６】水栓を開いて勢い良く吐水している途中で
水栓を閉止したとき、直ちに逆止弁装置が働いて通水路
の下流側部分、つまり逆止弁装置より下流側の部分を密
閉状態とするために、同部分において突発的に高圧力が
生じてウォーターハンマーを引き起すのである。特に水
栓がシングルレバー式の水栓の場合、急激なレバー操作
が可能であって水栓を急閉止できるために、上記ウォー
ターハンマーが発生し易い。When the faucet is closed while the faucet is being opened and spouting water vigorously, the check valve device immediately operates to seal the downstream side portion of the water passage, that is, the portion downstream of the check valve device. In order to bring it into the state, a high pressure is suddenly generated in the same portion to cause the water hammer. In particular, when the faucet is a single-lever type faucet, the water hammer can easily occur because the lever can be rapidly operated and the faucet can be quickly closed.
【０００７】またこのようなウォーターハンマーの発生
の他、逆止弁装置の配設によって従来次のような問題も
生じていた。即ち、湯水混合水栓において湯のみを流し
続けたとき、水側の通水路において水が密閉系内で加熱
されて膨張し、その膨張圧によって水栓のシール部等か
ら漏れを生じたり、或いはシール部が損傷したりする問
題が生じていた。In addition to the occurrence of such a water hammer, the following problems have conventionally been caused by the arrangement of the check valve device. That is, when only hot water is kept flowing in the hot and cold water mixing faucet, the water is heated in the closed system in the water passage and expands, and the expansion pressure causes leakage from the sealing part of the faucet or the seal. There was a problem that the part was damaged.
【０００８】そこでこれを防止するため、従来、逆止弁
装置と併せて通水路上に独立した形態のウォーターハン
マー防止器を設けることが行われている。しかしながら
このように独立した形態のウォーターハンマー防止器を
設ける場合コストが高くなる問題があり、またウォータ
ーハンマー防止器の組付けのための工数が増す問題があ
る。Therefore, in order to prevent this, conventionally, a water hammer preventer of an independent form is provided on the water passage together with the check valve device. However, when the water hammer preventer of such an independent form is provided, there is a problem that the cost becomes high and the number of steps for assembling the water hammer preventer increases.
【０００９】そこで逆止弁装置にウォーターハンマー防
止機能を持たせるといったことも行われている。図９は
そのウォーターハンマー防止機能を備えた逆止弁装置の
例を示している。同図において２２４はサプライ管２０
０上に設けられた逆止弁装置で、２２６は管体に一体に
形成された円筒状のハウジングである。ハウジング２２
６は、分割体２２６Ａと２２６Ｂとをねじ結合して構成
してある。Therefore, the check valve device is also provided with a water hammer preventing function. FIG. 9 shows an example of a check valve device having the water hammer prevention function. In the figure, 224 is the supply pipe 20.
The reference numeral 226 is a check valve device provided on the upper part of the cylinder 0. Housing 22
6 is formed by screwing the divided bodies 226A and 226B.
【００１０】２２８は圧力逃し弁体を兼ねたスリーブ
で、第二ばね部材２３４により上端部がシール部材２３
０を介して、ハウジング２２６に一体形成された弁座部
（第二弁座部）２３２に当接する向きに付勢されてい
る。スリーブ２２８の内側には、逆止弁体２３６と、逆
止弁体２３６に一体形成された弁棒２３８とが配置され
ており、その逆止弁体２３６が第一ばね部材２４０によ
り、スリーブ２２８に形成された弁座部（第一弁座部）
２４２に当接する向きに付勢されている。尚、弁棒２３
８はスリーブ２２８及びハウジング２２６と別体に構成
されたガイド部２４４に対して摺動可能に嵌合し、移動
案内されるようになっている。Reference numeral 228 is a sleeve which also serves as a pressure relief valve, and the upper end portion of which is sealed by the second spring member 234.
It is urged in such a direction as to come into contact with a valve seat portion (second valve seat portion) 232 integrally formed with the housing 226 via 0. Inside the sleeve 228, a check valve body 236 and a valve rod 238 integrally formed with the check valve body 236 are arranged, and the check valve body 236 is caused by the first spring member 240 to make the sleeve 228. Valve seat (first valve seat)
It is biased in the direction of abutting against 242. The valve rod 23
Reference numeral 8 is slidably fitted to a guide portion 244 formed separately from the sleeve 228 and the housing 226, and is guided for movement.
【００１１】このウォーターハンマー防止機能付逆止弁
装置２２４の場合、通常時には矢印方向（順方向）の水
の流れによって逆止弁体２３６が開き、水の流れを許容
する一方、逆方向の流れに対しては逆止弁体２３６が弁
座部２４２に当接・着座して逆方向の流れを阻止する。In the case of the check valve device 224 with the water hammer prevention function, the check valve body 236 is normally opened by the flow of water in the arrow direction (forward direction) to allow the water flow, while the flow in the reverse direction is allowed. On the other hand, the check valve body 236 abuts and seats on the valve seat portion 242 to prevent the flow in the reverse direction.
【００１２】また逆止弁装置２２４よりも下流側の圧力
が高まったときには、圧力逃し弁体を兼ねたスリーブ２
２８が図中下向きにスライド移動して密閉された系内水
の圧力、つまり逆止弁装置２２４よりも下流側の水の圧
力を逃し、ウォーターハンマーを防止する。また併せ
て、密閉系内の水が膨張して圧力上昇した場合において
もその圧力を逃すように作用する。When the pressure on the downstream side of the check valve device 224 increases, the sleeve 2 also serving as a pressure relief valve body.
28 slides downward in the drawing to release the pressure of water in the system, which is the pressure on the downstream side of the check valve device 224, to prevent water hammer. At the same time, even when the water in the closed system expands and the pressure rises, the pressure is released.
【００１３】[0013]
【発明が解決しようとする課題】しかしながらこのウォ
ーターハンマー防止機能付逆止弁装置２２４の場合、圧
力逃し弁体を兼ねたスリーブ２２８をハウジング２２６
に対してスライド移動可能に組み込むことが必要である
関係上、ハウジング２２６を分割構成としなければなら
ないとともに、逆止弁装置２２４そのものが必然的に大
型化し、コスト上昇をもたらす他、従来既存の水栓等に
おける組付部に対して逆止弁装置をそのまま組み付ける
ことができないといった問題がある。However, in the case of the check valve device 224 with the water hammer prevention function, the sleeve 228 also serving as the pressure relief valve body is provided with the housing 226.
Since the housing 226 has to be divided into parts because it is required to be slidably installed, the check valve device 224 itself inevitably becomes large in size, resulting in an increase in cost. There is a problem that the check valve device cannot be assembled as it is to the assembly part of the stopper or the like.
【００１４】加えてこの逆止弁装置２２４の場合、スリ
ーブ２２８が勢い良く開くとき、即ちスリーブ２２８に
て構成された圧力逃し弁体が勢い良く開弁動作したとき
に、このスリーブ２２８がハウジング２２６に内向きに
突出状に形成されたばね受部２４６に当接して止水動作
を行ってしまい、これによりウォーターハンマーが必ず
しも確実に防止されないといった不具合があった。In addition, in the case of the check valve device 224, when the sleeve 228 is opened vigorously, that is, when the pressure relief valve body constituted by the sleeve 228 is opened vigorously, the sleeve 228 is housed in the housing 226. In addition, there was a problem that the water hammer was not always reliably prevented by contacting the inwardly projecting spring receiving portion 246 to perform the water stopping operation.
【００１５】[0015]
【課題を解決するための手段】本願の発明はこのような
課題を解決するためになされたものである。而して本願
の発明の逆止弁装置は、通水路上に設けられ、実質上該
通水路の水の上流側から下流側に向かう順方向の流れの
みを許容し、逆方向の流れを阻止する逆止弁装置であっ
て、（イ）前記通水路の一部を成す流路を内部に有する
保持スリーブと、（ロ）該保持スリーブの内面側且つ該
流路上に形成された第一弁座部と、（ハ）前記保持スリ
ーブの内部に配置されて該保持スリーブにより保持さ
れ、前記流路における水の前記順方向の流れを許容する
向きに前記第一弁座部から離間する一方、前記逆方向の
流れを阻止する向きに該第一弁座部に当接する逆止弁体
と、（ニ）該逆止弁体を前記第一弁座部に当接させる向
きに付勢する第一ばね部材と、（ホ）前記通水路におけ
る前記逆止弁体の上流側と下流側とを連通させる状態に
該逆止弁体を貫通して形成された圧力逃し通路と、
（ヘ）該逆止弁体の該圧力逃し通路上に設けられた第二
弁座部と、（ト）該逆止弁体に組み付けられ、前記通水
路における該逆止弁体の下流側から上流側への水の漏れ
を許容する向きに該第二弁座部から離間する一方、該上
流側から下流側に向かう水の漏れを阻止する向きに該第
二弁座部に対して当接する圧力逃し弁体と、（チ）該圧
力逃し弁体を該第二弁座部に当接させる向きに所定のば
ね力で付勢する第二ばね部材とを含むことを特徴とする
（請求項１）。The invention of the present application has been made to solve such a problem. Thus, the check valve device of the invention of the present application is provided on the water passage, and substantially permits only the forward flow of water in the water passage from the upstream side to the downstream side, and blocks the reverse flow. And (b) a first sleeve formed on the inner surface side of the holding sleeve and on the flow path, and (b) a holding sleeve having therein a flow path forming a part of the water passage. A seat portion, and (c) is disposed inside the holding sleeve and held by the holding sleeve, and is separated from the first valve seat portion in a direction that allows the forward flow of water in the flow path, A check valve body that abuts the first valve seat portion in a direction that prevents the flow in the reverse direction; and (d) a biasing force that biases the check valve body in a direction that abuts the first valve seat portion. (1) the check valve in a state where the one spring member and (e) the upstream side and the downstream side of the check valve body in the water passage communicate with each other; A pressure release passage formed through the,
(F) A second valve seat portion provided on the pressure relief passage of the check valve body, and (g) assembled to the check valve body, from a downstream side of the check valve body in the water passage. The second valve seat portion is separated from the second valve seat portion in a direction that allows water leakage to the upstream side, and abuts against the second valve seat portion in a direction that prevents water leakage from the upstream side to the downstream side. A pressure relief valve body; and (h) a second spring member that biases the pressure relief valve body with a predetermined spring force in a direction to bring the pressure relief valve body into contact with the second valve seat portion. 1).
【００１６】本願の別の発明の逆止弁装置は、請求項１
において、前記逆止弁体及び圧力逃し弁体の共通の移動
案内用の弁棒がそれらの軸心方向に延びる状態で該圧力
逃し弁体の側に一体的に形成され、該弁棒が位置固定に
設けられたガイド部に摺動可能に嵌合されていることを
特徴とする（請求項２）。According to another aspect of the present invention, there is provided a check valve device.
In the above, a valve rod for common movement guide of the check valve body and the pressure relief valve body is integrally formed on the pressure relief valve body side in a state of extending in the axial direction thereof, and the valve rod is located at the position. It is characterized in that it is slidably fitted in a fixedly provided guide portion (claim 2).
【００１７】本願の更に別の発明の逆止弁装置は、請求
項２において、前記ガイド部が前記保持スリーブに固定
的に設けられていることを特徴とする（請求項３）。According to a second aspect of the present invention, a check valve device is characterized in that the guide portion is fixedly provided on the holding sleeve (third aspect).
【００１８】本願の更に別の発明の逆止弁装置は、請求
項１，２又は３において、前記保持スリーブにおける前
記第一弁座部に続く上流側の部分が、前記逆止弁体の軸
心方向に平行な被嵌合面として形成される一方、該逆止
弁体における該第一弁座部への当接部に続く上流側の部
分が、該被嵌合面と平行方向に所定長さで延び、該被嵌
合面に対して閉弁時に微小隙間で嵌合する嵌合面として
形成されていることを特徴とする（請求項４）。According to still another aspect of the present invention, there is provided a check valve device according to any one of claims 1, 2 and 3, wherein an upstream portion of the holding sleeve following the first valve seat portion has a shaft of the check valve body. While being formed as a fitted surface parallel to the axial direction, an upstream side portion of the check valve body following the contact portion with the first valve seat portion is predetermined in a direction parallel to the fitted surface. It is characterized in that it is formed as a fitting surface which extends in a length and is fitted into the fitted surface with a minute gap when the valve is closed (claim 4).
【００１９】本願の更に別の発明の逆止弁装置は、請求
項１，２，３又は４において、前記第二ばね部材が、一
端部において前記圧力逃し弁体に、他端部において前記
逆止弁体に形成されたばね受部にそれぞれ当接させられ
るとともに、該圧力逃し弁体側が小径で該逆止弁体側が
大径且つ該小径側から大径側に径が漸次増大する形状と
されており、更に前記ばね受部が該圧力逃し弁体よりも
径方向外側に形成されていることを特徴とする（請求項
５）。According to still another aspect of the present invention, there is provided a check valve device according to claim 1, 2, 3 or 4, wherein the second spring member is provided at one end with the pressure relief valve body and at the other end with the check valve. The pressure receiving valve body side has a small diameter, the check valve body side has a large diameter, and the diameter gradually increases from the small diameter side to the large diameter side while being brought into contact with the spring receiving portions formed on the stop valve body. Further, the spring receiving portion is formed radially outward of the pressure relief valve body (claim 5).
【００２０】[0020]
【作用及び発明の効果】以上のように請求項１の発明
は、逆止弁装置においてスリーブの内側に配置保持され
た逆止弁体に圧力逃し通路を形成して、その圧力逃し通
路を開閉する状態に圧力逃し弁体を組み込み、そしてこ
れを第二ばね部材より第二弁座部に当接させる向きに付
勢したものである。As described above, the invention of claim 1 forms the pressure relief passage in the check valve body arranged and held inside the sleeve in the check valve device, and opens and closes the pressure relief passage. In this state, the pressure relief valve body is incorporated, and the second spring member biases the pressure relief valve body in the direction of abutting the second valve seat portion.
【００２１】即ち、通水路における逆止弁装置よりも下
流側の部分の圧力が一定圧力以上に高まったときに、そ
の圧力に基づいて圧力逃し弁体を開き、内部にこもった
圧力を逃すように成したもので、本発明によれば、圧力
逃し弁体の作用に基づいてウォーターハンマーの発生を
良好に抑制することができ、或いは逆止弁装置より下流
側の部分に密閉された水が加熱膨張されたときに、その
膨張圧を良好に逃すことができ、圧力上昇に基づいてシ
ール部等が損傷するのを良好に防止することができる。That is, when the pressure in the portion of the water passage on the downstream side of the check valve device rises above a certain pressure, the pressure relief valve body is opened based on the pressure so that the pressure accumulated inside is released. According to the present invention, it is possible to satisfactorily suppress the occurrence of a water hammer based on the action of the pressure relief valve body, or the water sealed in the portion on the downstream side of the check valve device is When heated and expanded, the expansion pressure can be satisfactorily released, and damage to the seal portion and the like due to the increase in pressure can be effectively prevented.
【００２２】本発明の装置は、図９に示す逆止弁装置の
ようにスリーブ自体が圧力逃し弁体を構成するものでは
なく、スリーブの内側において逆止弁体に圧力逃し通
路，圧力逃し弁体等を設けている。従って本発明によれ
ば逆止弁装置をコンパクトに構成することができ、且つ
逆止弁装置を従来既存の組付部にそのまま組み付けるこ
とができる。In the device of the present invention, the sleeve itself does not constitute a pressure relief valve body like the check valve device shown in FIG. 9, but the pressure relief passage and the pressure relief valve are provided in the check valve body inside the sleeve. The body etc. are provided. Therefore, according to the present invention, the check valve device can be made compact, and the check valve device can be directly assembled to the existing assembly part.
【００２３】請求項２の発明は、逆止弁体及び圧力逃し
弁体に共通の移動案内用の弁棒を設けて、これを位置固
定状態のガイド部に摺動可能に嵌合するように成したも
ので、本発明によれば、それら弁棒，ガイド部の作用に
基づいて逆止弁体を圧力逃し弁体とともに円滑に移動案
内できるのに加えて、圧力逃し弁体自身を逆止弁体に対
して円滑に相対移動運動させることができる。また本発
明によれば弁棒が一つで済むため、装置の構造が簡素且
つコンパクトになる利点が得られる。According to a second aspect of the present invention, a common valve guide rod is provided for the check valve body and the pressure relief valve body, and the valve rod is slidably fitted to the guide portion in a fixed position. According to the present invention, the check valve body can be smoothly moved and guided together with the pressure relief valve body based on the action of the valve rod and the guide portion, and the pressure relief valve body itself can be non-returned. The relative movement can be smoothly performed with respect to the valve body. Further, according to the present invention, since only one valve rod is required, there is an advantage that the structure of the device is simple and compact.
【００２４】請求項３の発明は、上記ガイド部を上記ス
リーブに固定的に設けたもので、本発明によれば、逆止
弁装置の構造が単純化するとともに、逆止弁装置の組付
けも容易となる。According to the invention of claim 3, the guide portion is fixedly provided on the sleeve. According to the invention, the structure of the check valve device is simplified and the check valve device is assembled. Will also be easier.
【００２５】請求項４の発明は、保持スリーブにおける
第一弁座部に続く上流側の部分を被嵌合面として、また
逆止弁体における対応する部分を嵌合面として成形し、
それらを閉弁時に軸方向所定長さに亘って微小隙間で嵌
合させるように成したもので、本発明によれば、逆止弁
体の開弁時に離間状態にあったそれら嵌合面と被嵌合面
とが閉弁時に嵌合する際に逆止弁体の閉弁動作に対する
抵抗を与え、これにより逆止弁体が緩やかにゆっくりと
閉弁動作するようになり、逆止弁体の急激な閉弁動作に
基づくウォーターハンマーが効果的に抑制される利点が
得られる。According to a fourth aspect of the present invention, the upstream side portion of the holding sleeve following the first valve seat portion is formed as a fitted surface, and the corresponding portion of the check valve body is formed as a fitting surface.
According to the present invention, they are fitted with a minute gap over a predetermined length in the axial direction when the valve is closed. When the mating surface and the mating surface are engaged when the valve is closed, it provides resistance to the valve closing operation of the check valve body, which allows the check valve body to slowly and slowly close the valve. There is an advantage that the water hammer due to the sudden valve closing action of is effectively suppressed.
【００２６】請求項５の発明は、前記圧力逃し弁体を付
勢する第二ばね部材を、圧力逃し弁体側の小径部から逆
止弁体側の大径部にかけて径が漸次増大する形状と成す
とともに、かかる逆止弁体に、圧力逃し弁体よりも径方
向外側において大径側の端部を受けるばね受部を設ける
ように成したもので、本発明によれば、圧力逃し弁体の
開弁動作時に圧力逃し弁体がこのばね受部に当接して止
水をしてしまうといったことがなく、従って良好にウォ
ーターハンマーの発生防止及び逆止弁装置よりも下流側
の部分において高まった圧力の逃しを行うことができ
る。According to a fifth aspect of the present invention, the second spring member for urging the pressure relief valve body has a shape in which the diameter gradually increases from the small diameter portion on the pressure relief valve body side to the large diameter portion on the check valve body side. Along with this, the check valve body is provided with a spring receiving portion that receives an end portion on the large diameter side radially outward of the pressure relief valve body. When the valve is opened, the pressure relief valve body does not come into contact with this spring bearing part to stop water, so it is possible to prevent water hammer from occurring and to improve it in the downstream side of the check valve device. The pressure can be relieved.
【００２７】[0027]
【実施例】次に本発明の実施例を図面に基づいて詳しく
説明する。図２において、１０は水栓の一例としてキッ
チンのカウンター１２上に設置されたシングルレバー式
混合水栓を示したもので、操作部としてのレバー１４を
有しており、このレバー１４の回動操作に基づいて吐水
口１６より湯又は水ないしそれらの混合水を吐水するよ
うになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 2, reference numeral 10 denotes a single-lever type mixed faucet installed on the counter 12 of the kitchen as an example of the faucet, which has a lever 14 as an operation unit, and the rotation of the lever 14 Hot water or water or a mixed water thereof is discharged from the water discharge port 16 based on an operation.
【００２８】水栓１０における本体からは、図３に示し
ているようにカウンター１２の下側において、水栓本体
に対し湯又は水（以下特別の場合を除いて単に水とす
る）を供給するための一対のサプライ管１８が延び出し
ており、それらサプライ管１８上に本例のウォーターハ
ンマー防止機能付逆止弁装置２０が設けられている。From the main body of the faucet 10, hot water or water (hereinafter simply referred to as water unless otherwise specified) is supplied to the faucet main body under the counter 12 as shown in FIG. For this purpose, a pair of supply pipes 18 are extended and the check valve device 20 with a water hammer prevention function of this example is provided on the supply pipes 18.
【００２９】図１は逆止弁装置２０の具体的構造を示し
ている。図において２２は円筒形状の保持スリーブであ
って、軸方向一端部外周面に雄ねじを有し、この雄ねじ
において有底円筒形状のキャップ２４の内周面の雌ねじ
に螺合されている。キャップ２４は、また、外周面に雄
ねじを有しており、その雄ねじが管体２６に一体に形成
された円筒状のハウジング２８の内周面の雌ねじに螺合
されている。即ち保持スリーブ２２は、キャップ２４を
介してハウジング２８にねじ結合され、固定されてい
る。尚、保持スリーブ２２にはその内部と外部とを連通
させる通孔２３が形成されている。FIG. 1 shows a specific structure of the check valve device 20. In the figure, reference numeral 22 denotes a cylindrical holding sleeve, which has an external thread on the outer peripheral surface at one end in the axial direction, and this external thread is screwed to an internal thread on the inner peripheral surface of the cap 24 having a bottomed cylindrical shape. The cap 24 also has a male screw on the outer peripheral surface, and the male screw is screwed into a female screw on the inner peripheral surface of a cylindrical housing 28 formed integrally with the tube body 26. That is, the holding sleeve 22 is screwed and fixed to the housing 28 via the cap 24. In addition, the holding sleeve 22 is formed with a through hole 23 for communicating the inside and the outside thereof.
【００３０】保持スリーブ２２の内側には逆止弁体３０
が配置されており、この逆止弁体３０がシール部材３２
を介して、保持スリーブ２２の端部に形成された第一弁
座部３４に当接させられるようになっている。尚、逆止
弁体３０は通水路１５内における水の順方向の流れ、つ
まり図中下側から水栓本体に向かう上向きの流れを許容
し、その逆方向の流れを阻止する向きに配向されてい
る。この逆止弁体３０からは、これとは別体をなす弁棒
３６が図中左向きに延び出していて、その先端部に鍔付
円筒形状のばね受部材３８が固定されている。A check valve body 30 is provided inside the holding sleeve 22.
And the check valve body 30 is provided with a seal member 32.
The first valve seat portion 34 formed on the end portion of the holding sleeve 22 is brought into contact with the first valve seat portion 34 via the. The check valve body 30 is oriented so as to allow a forward flow of water in the water passage 15, that is, an upward flow from the lower side in the figure toward the faucet body, and prevent the reverse flow. ing. A valve rod 36, which is separate from the check valve body 30, extends leftward in the drawing, and a flanged cylindrical spring receiving member 38 is fixed to the tip end thereof.
【００３１】一方保持スリーブ２２の内側には、ばね受
部材３８とは軸方向に所定距離隔たった位置において鍔
付円筒形状のガイド部材（ガイド部）４０が止め輪４２
にて固定的に設けられており、それらばね受部材３８と
ガイド部材４０との間に、圧縮コイルスプリングから成
る第一ばね部材４４が予備圧縮状態で介装されている。On the other hand, inside the holding sleeve 22, a cylindrical guide member (guide portion) 40 with a collar is provided at a position separated from the spring receiving member 38 by a predetermined distance in the axial direction.
The first spring member 44, which is a compression coil spring, is interposed between the spring receiving member 38 and the guide member 40 in a pre-compressed state.
【００３２】即ち、第一ばね部材４４による付勢力が、
弁棒３６及び後述の第二ばね部材４６を介して逆止弁体
３０に対し、これを第一弁座部３４に当接させる向きに
及ぼされている。尚、弁棒３６はガイド部材４０の内周
面に摺動可能に嵌合されており、かかるガイド部材４０
によって軸心方向に移動案内されるようになっている。
ここでガイド部材４０の鍔部には、その上流側と下流側
の部分とを連通させる連通穴４８が形成されている。That is, the urging force of the first spring member 44 is
The check valve body 30 is extended through the valve rod 36 and a second spring member 46, which will be described later, in a direction in which the check valve body 30 is brought into contact with the first valve seat portion 34. The valve rod 36 is slidably fitted to the inner peripheral surface of the guide member 40.
It is designed to be moved and guided in the axial direction.
Here, the flange portion of the guide member 40 is formed with a communication hole 48 for communicating the upstream side and the downstream side thereof.
【００３３】前記逆止弁体３０には、その上流側と下流
側とを連通させる貫通の圧力逃し通路５０が形成されて
いる。一方上記弁棒３６の端部近傍には、円板状の圧力
逃し弁体５２が一体に形成されており、この圧力逃し弁
体５２がシール部材５６を介して、逆止弁体３０に形成
された第二弁座部５４に当接させられるようになってい
る。即ち圧力逃し弁体５２が第二弁座部５４に当接し、
またはこれから離間することによって圧力逃し通路５０
が開閉されるようになっている。ここで圧力逃し弁体５
２は、その下流側から上流側に向かう水の漏れを許容
し、逆方向の漏れを阻止する向きに配向されている。The check valve body 30 is formed with a through pressure relief passage 50 which communicates the upstream side and the downstream side thereof. On the other hand, a disc-shaped pressure relief valve body 52 is integrally formed near the end portion of the valve rod 36, and the pressure relief valve body 52 is formed on the check valve body 30 via the seal member 56. The second valve seat portion 54 is abutted. That is, the pressure relief valve body 52 contacts the second valve seat portion 54,
Alternatively, the pressure relief passage 50 may be separated from the pressure relief passage 50.
Is designed to be opened and closed. Pressure relief valve body 5 here
2 is oriented so as to allow water to leak from the downstream side to the upstream side and prevent leakage in the opposite direction.
【００３４】この圧力逃し弁体５２の背面には、圧縮コ
イルスプリングから成る第二ばね部材４６の一端部が当
接させられている。この第二ばね部材４６は、全体とし
て筒状且つテーパ形状をなしており、小径側の端部が圧
力逃し弁体５２に、また大径側の端部が、圧力逃し弁体
５２の径方向外側において逆止弁体３０に形成されたば
ね受部５８に当接させられており、その付勢力を圧力逃
し弁体５２に対して、これを第二弁座部５４に当接させ
る向きに及ぼしている。On the back surface of the pressure relief valve body 52, one end of a second spring member 46 composed of a compression coil spring is brought into contact. The second spring member 46 has a tubular shape and a tapered shape as a whole, and the end portion on the small diameter side is in the pressure relief valve body 52 and the end portion on the large diameter side is in the radial direction of the pressure relief valve body 52. The spring receiving portion 58 formed on the check valve body 30 is brought into contact with the outer side thereof, and its urging force is exerted on the pressure relief valve body 52 in a direction to bring it into contact with the second valve seat portion 54. ing.
【００３５】図１の部分拡大図に示しているように、保
持スリーブ２２における第一弁座部３４に続く上流側の
部分には、逆止弁体３０の軸心と平行方向に所定長さで
延びる被嵌合面６０が形成されている。一方逆止弁体３
０においても、第一弁座部３４への当接部に続く上流側
の部分に、その軸心と平行方向に延びる嵌合面６２が所
定長さで形成されており、この嵌合面６２が逆止弁体３
０の閉弁時に被嵌合面６０に対して嵌合するようになさ
れている。As shown in the partially enlarged view of FIG. 1, a portion of the holding sleeve 22 upstream from the first valve seat portion 34 has a predetermined length in a direction parallel to the axis of the check valve body 30. A mating surface 60 extending in is formed. On the other hand, check valve body 3
Also in No. 0, a fitting surface 62 extending in a direction parallel to the axis of the fitting surface 62 is formed in a predetermined length at a portion on the upstream side following the contact portion with the first valve seat portion 34. Check valve body 3
It is adapted to be fitted to the fitted surface 60 when the valve is closed at zero.
【００３６】本例の逆止弁装置２０の場合、通水路１５
内の水が図中矢印方向に流れるとき、即ち給水源から水
栓本体に向かって順方向に流れるとき、図４（Ａ）に示
しているように逆止弁体３０が第一弁座部３４から離間
して通水路１５を開放し、同方向の流れを許容する。ま
た一方逆方向の流れに対しては、図４（Ｂ）に示してい
るように逆止弁体３０が第一弁座部３４に当接・着座し
て通水路１５を遮断し、逆方向の流れを阻止する。従っ
て水栓１０のレバー１４を操作して水栓内部の弁を開く
と、通水路１５内の水が直ちに水栓本体内部の通路を経
由して吐水口１６の先端部より吐水される。In the case of the check valve device 20 of this example, the water passage 15
When the water in the inside flows in the direction of the arrow in the figure, that is, when the water flows in the forward direction from the water supply source toward the faucet body, the check valve body 30 has the first valve seat portion as shown in FIG. The water passage 15 is opened apart from 34 to allow the flow in the same direction. On the other hand, for the flow in the reverse direction, the check valve body 30 abuts against and seats on the first valve seat portion 34 to shut off the water passage 15 as shown in FIG. Stop the flow of. Therefore, when the lever 14 of the faucet 10 is operated to open the valve inside the faucet, the water in the water passage 15 is immediately discharged from the tip of the water outlet 16 via the passage inside the faucet body.
【００３７】一方、吐水を停止させるべくレバー１４を
操作して水栓本体内部の弁を急閉止すると、逆止弁体３
０が瞬間的に閉弁動作する。この結果、逆止弁装置２０
より下流側の部分が密閉状態となって瞬間的に圧力上昇
しようとする。On the other hand, when the lever 14 is operated to stop the water discharge and the valve inside the faucet body is suddenly closed, the check valve body 3
0 instantaneously closes the valve. As a result, the check valve device 20
The portion on the more downstream side becomes a sealed state and tries to increase the pressure instantaneously.
【００３８】しかるに本例の逆止弁装置２０の場合、こ
れより下流側の部分において圧力上昇が生じ、そしてそ
の圧力が一定圧力に到達すると、即ち下流側の部分と上
流側の部分との間に一定以上の大きさの差圧が生じる
と、図５に示しているようにその差圧に基づいて圧力逃
し弁体５２が開弁動作し（本例では差圧が３ｋｇｆ／ｃ
ｍ2以上となったときに圧力逃し弁体５２が開弁動作す
るように第二ばね部材４６のばね力が設定されてい
る）、下流側の部分にこもった圧力を逃すように作用す
る。これにより、逆止弁装置２０よりも下流側の部分に
大きな突発的圧力上昇が生じるのが回避され、以てその
突発的圧力上昇に起因するウォーターハンマーの発生が
防止される。However, in the case of the check valve device 20 of the present example, when the pressure rises in the downstream portion and the pressure reaches a certain pressure, that is, between the downstream portion and the upstream portion. When a pressure difference of a certain magnitude or more occurs in the valve, the pressure relief valve element 52 opens based on the pressure difference as shown in FIG. 5 (in this example, the pressure difference is 3 kgf / c).
The spring force of the second spring member 46 is set so that the pressure relief valve body 52 performs the valve opening operation when the pressure becomes m 2 or more), and acts to relieve the pressure accumulated in the downstream portion. As a result, it is possible to prevent a large sudden pressure increase from occurring in the portion downstream of the check valve device 20, and thus to prevent the occurrence of a water hammer due to the sudden pressure increase.
【００３９】本例の湯水混合水栓１０においては、水栓
本体内部における水側の通路を遮断した状態で湯側の通
路のみを開いた場合、即ち吐水口１６から湯のみを連続
的に吐水した場合、水栓本体が湯の加熱作用によって温
度上昇し、これとともに水側の通水路における逆止弁装
置２０より下流側の部分に閉じ込められた水が加熱膨張
して、そこに膨張圧が発生する。In the hot and cold water mixing faucet 10 of this embodiment, when only the hot water passage is opened with the water passage inside the faucet body closed, that is, only hot water is continuously discharged from the water discharge port 16. In this case, the temperature of the faucet body rises due to the heating action of the hot water, and along with this, the water trapped in the portion of the water passage on the downstream side of the check valve device 20 heats and expands, generating an expansion pressure there. To do.
【００４０】本例の逆止弁装置２０においては、そのと
きにも圧力逃し弁体５２が開弁動作して上昇した圧力を
逃すように作用し、逆止弁装置２０の下流側の部分に高
い圧力がこもった状態となるのを防止する。従って逆止
弁装置２０の下流側の部分において生じた圧力上昇によ
り、水栓１０におけるシール部からの漏れやシール部の
損傷が良好に回避される。In the check valve device 20 of the present embodiment, the pressure relief valve body 52 also acts to release the increased pressure by the valve opening operation at that time, and the pressure relief valve body 52 acts on the downstream side portion of the check valve device 20. Prevents high pressure buildup. Therefore, due to the pressure increase generated in the downstream side portion of the check valve device 20, leakage from the seal portion of the water faucet 10 and damage to the seal portion are favorably avoided.
【００４１】本例の逆止弁装置２０は、保持スリーブ２
２の内側に配置保持された逆止弁体３０に圧力逃し通路
５０を形成し、かかる逆止弁体３０に圧力逃し弁体５２
を設けたもので、本例によれば、逆止弁装置２０をコン
パクトに構成することができ、また逆止弁装置２０を従
来既存の組付部にそのまま組み付けることが可能であ
る。The non-return valve device 20 of this embodiment is provided with the holding sleeve 2.
The pressure relief passage 50 is formed in the check valve body 30 arranged and held inside the pressure relief valve body 30, and the pressure relief valve body 52 is formed in the check valve body 30.
According to the present embodiment, the check valve device 20 can be made compact, and the check valve device 20 can be assembled as it is to the existing assembly part of the related art.
【００４２】また本例の装置は、逆止弁体３０及び圧力
逃し弁体５２に共通の弁棒３６を設けてこれを位置固定
のガイド部材４０に摺動可能に嵌合させ、以て移動案内
させるようになしたもので、本例によれば逆止弁体３０
及び圧力逃し弁体５２を一体で開弁及び閉弁動作させる
場合も、また圧力逃し弁体５２を単独で開弁及び閉弁動
作させる際にも、円滑にそれらの開弁及び閉弁動作を行
わせることができる。加えて本例によれば、移動案内用
の弁棒３６が１つで済むため、装置の構造が簡素且つコ
ンパクトになる利点がある。Further, in the apparatus of this embodiment, the check valve body 30 and the pressure relief valve body 52 are provided with a common valve rod 36, which is slidably fitted to the position-fixed guide member 40 and moved. According to this example, the check valve body 30 is provided.
Also, when the pressure relief valve body 52 is integrally opened and closed, and also when the pressure relief valve body 52 is independently opened and closed, the valve opening and closing operations are smoothly performed. Can be done. In addition, according to this example, since only one valve rod 36 for movement guide is required, there is an advantage that the structure of the device is simple and compact.
【００４３】更に本例においては、上記ガイド部材４０
が保持スリーブ２２に固定的に設けられているため、逆
止弁装置２０の組付けに際して別体のガイド部材を保持
スリーブ２２と別に組み付ける必要がなく、逆止弁装置
２０の構造が単純化するとともに組付作業も容易とな
る。Further, in this example, the guide member 40 is used.
Is fixedly provided on the holding sleeve 22, there is no need to assemble a separate guide member separately from the holding sleeve 22 when assembling the check valve device 20, and the structure of the check valve device 20 is simplified. At the same time, assembly work becomes easy.
【００４４】更に本例の逆止弁装置２０の場合、逆止弁
体３０の閉弁時に保持スリーブ２２に形成した被嵌合面
６０に対して逆止弁体３０に形成した嵌合面６２が嵌合
し、その際に逆止弁体３０に対する閉弁抵抗が生じるこ
とから、逆止弁体３０が緩やかに且つゆっくりと閉弁動
作し、これによりウォーターハンマーの発生がより効果
的に防止される利点がある。Further, in the case of the check valve device 20 of this embodiment, the fitting surface 62 formed on the check valve body 30 with respect to the fitted surface 60 formed on the holding sleeve 22 when the check valve body 30 is closed. Are engaged with each other and the valve closing resistance against the check valve body 30 is generated at that time, so the check valve body 30 slowly and slowly closes the valve, thereby more effectively preventing the occurrence of a water hammer. There are advantages.
【００４５】その他本例の逆止弁装置２０の場合、圧力
逃し弁体５２を付勢する第二ばね部材４６の大径側の端
部を受けるためのばね受部５８が、圧力逃し弁体５２よ
りも径方向外側に形成されているため、圧力逃し弁体５
２の開弁動作時に圧力逃し弁体５２がばね受部５８に当
って止水動作をしてしまうといった不具合を生じず、従
って圧力逃し弁体５２が勢い良く開弁動作した場合にお
いても、確実にばね受部５８への当接に基づく止水動作
を回避でき、以てウォーターハンマーの発生を確実に防
止できる。Others In the case of the check valve device 20 of this example, the spring receiving portion 58 for receiving the end portion on the large diameter side of the second spring member 46 for urging the pressure relief valve body 52 has the pressure relief valve body. Since it is formed radially outside of 52, the pressure relief valve body 5
2 does not cause a problem that the pressure relief valve body 52 hits the spring receiving portion 58 to stop the water during the valve opening operation, and therefore, even when the pressure relief valve body 52 vigorously opens the valve. Further, it is possible to avoid the water stopping operation due to the contact with the spring receiving portion 58, and thus it is possible to reliably prevent the generation of the water hammer.
【００４６】図６は本発明の他の実施例を示している。
この例の湯水混合水栓６４は壁付けのものであって、水
栓本体６６と、吐水口６８と、給水，給湯管を兼ねた一
対の脚７０とを備えて成り、その水栓本体６６と脚７０
との連結部分に逆止弁装置７２が組み込まれている。FIG. 6 shows another embodiment of the present invention.
The hot and cold water mixing faucet 64 of this example is a wall-mounted type, and is provided with a faucet body 66, a spout 68, and a pair of legs 70 that also serve as water supply and hot water supply pipes. And legs 70
A check valve device 72 is incorporated in the connecting portion with the.
【００４７】図６の拡大図に示しているようにこの例の
逆止弁装置７２は、水栓本体６６に形成された円筒状の
ハウジング７４への袋ナット７６のねじ込みによって、
ハウジング７４の内面に嵌合状態に且つ当接部７８に当
接する状態に組み込まれている。As shown in the enlarged view of FIG. 6, the check valve device 72 of this example has a cap nut 76 screwed into a cylindrical housing 74 formed in the faucet body 66.
It is incorporated in the inner surface of the housing 74 in a fitted state and in a state of abutting on the abutting portion 78.
【００４８】図７はその逆止弁装置７２の具体的構造を
示している。同図において８０は円筒形状の保持スリー
ブで、その内側に逆止弁体８１が配置されており、その
逆止弁体８１が、シール部材８２を介して保持スリーブ
８０の端部に形成された第一弁座部８４に当接させられ
るようになっている。尚、保持スリーブ８０にはその内
部と外部とを連通させる通孔８５が形成されている。FIG. 7 shows a specific structure of the check valve device 72. In the figure, reference numeral 80 denotes a cylindrical holding sleeve in which a check valve body 81 is arranged, and the check valve body 81 is formed at the end of the holding sleeve 80 via a seal member 82. The first valve seat portion 84 is brought into contact with the first valve seat portion 84. In addition, the holding sleeve 80 is formed with a through hole 85 for communicating the inside and the outside thereof.
【００４９】ここで逆止弁体８１は、第一弁座部８４に
対して図中下側から上向きに当接して、即ち保持スリー
ブ８０の内部から外部に向かう方向に第一弁座部８４に
当接して通水路における逆方向の流れを阻止する。Here, the check valve body 81 abuts the first valve seat portion 84 from the lower side in the figure upward, that is, in the direction from the inside of the holding sleeve 80 to the outside thereof. To block the reverse flow in the water passage.
【００５０】この逆止弁体８１には、その上流側と下流
側とを連通させる貫通の圧力逃し通路８６と、第二弁座
部８８とが設けられている。そしてこの第二弁座部８８
に対して、圧力逃し弁体９０がシール部材９２を介して
当接し、または離間することによりその圧力逃し通路８
６が開閉されるようになっている。尚、図７から明らか
なように本例においては圧力逃し弁体９０が図中下側か
ら上向きにシール部材９２を介して第二弁座部８８に当
接させられ、またその逆方向に第二弁座部８８から離間
させられるようになっている。The check valve body 81 is provided with a penetrating pressure relief passage 86 for communicating the upstream side and the downstream side thereof, and a second valve seat portion 88. And this second valve seat portion 88
, The pressure relief valve body 90 abuts or separates via the seal member 92, so that the pressure relief passage 8
6 is opened and closed. As is clear from FIG. 7, in this example, the pressure relief valve body 90 is brought into contact with the second valve seat portion 88 from the lower side in the figure upward through the seal member 92, and in the opposite direction to the first direction. It is designed to be separated from the two-valve seat portion 88.
【００５１】この圧力逃し弁体９０からは、弁棒９４が
図中下向きに延び出しており、この弁棒９４が、保持ス
リーブ８０に固定的に設けられた円筒形状のガイド部９
６の内周面に摺動可能に嵌合され、移動案内されるよう
になっている。A valve rod 94 extends downward from the pressure relief valve body 90 in the drawing, and the valve rod 94 is fixed to the holding sleeve 80 and has a cylindrical guide portion 9 fixed thereto.
It is slidably fitted to the inner peripheral surface of 6 and is guided for movement.
【００５２】上記逆止弁体８１の背面には、圧縮コイル
スプリングから成る第一ばね部材９８の端部が当接させ
られ、かかる第一ばね部材９８の付勢力が逆止弁体８１
に対して及ぼされている。尚、この例では逆止弁体８１
に対し第一ばね部材９８の付勢力が、これを第一弁座部
８４に当接させる向きに直接的に及ぼされている。An end portion of a first spring member 98 made of a compression coil spring is brought into contact with the back surface of the check valve body 81, and the biasing force of the first spring member 98 is applied to the check valve body 81.
Have been affected against. In this example, the check valve body 81
On the other hand, the urging force of the first spring member 98 is directly exerted in the direction to bring it into contact with the first valve seat portion 84.
【００５３】一方、圧力逃し弁体９０に対しては圧縮コ
イルスプリングから成る第二ばね部材１００の付勢力
が、第一ばね部材９８とは逆向きに及ぼされている。即
ち圧力逃し弁体９０が第二弁座部８８に当接する向きに
第二ばね部材１００の付勢力が及ぼされている。On the other hand, the urging force of the second spring member 100, which is a compression coil spring, is exerted on the pressure relief valve body 90 in the direction opposite to that of the first spring member 98. That is, the urging force of the second spring member 100 is exerted in the direction in which the pressure relief valve body 90 comes into contact with the second valve seat portion 88.
【００５４】ここで第二ばね部材１００は、全体として
筒形状且つテーパ形状を成しており、小径側の端部が圧
力逃し弁体９０に当接させられ、また大径側の端部が逆
止弁体８１に形成されたばね受部１０２に当接させられ
ている。尚、ばね受部１０２は圧力逃し弁体９０の径方
向外側に形成されており、圧力逃し弁体９０の開弁動作
時にこのばね受部１０２が圧力逃し弁体９０に対して当
らないようにされている。Here, the second spring member 100 has a tubular shape and a tapered shape as a whole, the end portion on the small diameter side is brought into contact with the pressure relief valve body 90, and the end portion on the large diameter side is formed. It is brought into contact with a spring receiving portion 102 formed on the check valve body 81. The spring receiving portion 102 is formed on the outside in the radial direction of the pressure relief valve body 90 so that the spring receiving portion 102 does not contact the pressure relief valve body 90 during the valve opening operation of the pressure relief valve body 90. Has been done.
【００５５】本例の逆止弁装置７２の場合、水栓６４使
用時には逆止弁体８１が図中下向きに移動して、つまり
第一弁座部８４から離間する向きに移動して通水路を開
く。他方、水栓６４の弁を閉止したときには逆止弁体８
１が第一ばね部材９８の付勢力に基づいて第一弁座部８
４に当接し、通水路を遮断する。In the case of the check valve device 72 of this example, the check valve body 81 moves downward in the figure when the faucet 64 is used, that is, in the direction away from the first valve seat portion 84, and the water passage is formed. open. On the other hand, when the valve of the faucet 64 is closed, the check valve body 8
1 is the first valve seat portion 8 based on the biasing force of the first spring member 98.
Abut on No. 4 and shut off the water passage.
【００５６】その際、逆止弁装置７２の下流側における
圧力が上昇して一定圧に到達したとき、圧力逃し弁体９
０が第二弁座部８８から離間して圧力逃し通路８６を開
放し、下流側の部分の圧力を逃す。本例においても逆止
弁装置７２の下流側の部分と上流側の部分との差圧が３
ｋｇｆ／ｃｍ2以上となったときに圧力逃し弁体９０が
開弁動作するように、第二ばね部材１００のばね力が定
められている。At this time, when the pressure on the downstream side of the check valve device 72 rises and reaches a constant pressure, the pressure relief valve body 9
0 separates from the second valve seat portion 88, opens the pressure relief passage 86, and releases the pressure of the downstream portion. Also in this example, the pressure difference between the downstream side portion and the upstream side portion of the check valve device 72 is 3
The spring force of the second spring member 100 is set so that the pressure relief valve body 90 performs the valve opening operation when the pressure becomes equal to or higher than kgf / cm 2 .
【００５７】本例の逆止弁装置７２もまた、第一の実施
例の逆止弁装置２０と同様、逆止弁装置をコンパクトに
構成することができ、また従来既存の逆止弁装置におけ
る逆止弁体に代えて、圧力逃し機構付きの逆止弁体８１
をそのまま組み付けることで本例の逆止弁装置７２を構
成できる。The check valve device 72 of the present embodiment can also be constructed in a compact manner as in the check valve device 20 of the first embodiment, and the check valve device in the existing check valve device can be made compact. Instead of the check valve body, a check valve body 81 with a pressure relief mechanism
The check valve device 72 of the present embodiment can be configured by assembling the above as it is.
【００５８】また更に移動案内用の弁棒９４及びガイド
部９６の作用に基づいて、逆止弁体８１及び圧力逃し弁
体９０を一体で円滑に開弁及び閉弁動作させることがで
きるとともに、圧力逃し弁体９０の開弁・閉弁動作時に
も円滑にその動作を行わせることができる。その他、保
持スリーブ８０に形成した被嵌合面６０と逆止弁体８１
に形成した嵌合面６２との嵌合作用に基づいて、逆止弁
体８１の閉弁動作時にこれをゆっくりと行わせることが
でき、以てウォーターハンマーの発生を抑制できるな
ど、第一の実施例と同様の利点を有している。Furthermore, the check valve body 81 and the pressure relief valve body 90 can be smoothly opened and closed integrally as a result of the action of the movement guide valve rod 94 and the guide portion 96. Even when the pressure relief valve body 90 is opened / closed, the operation can be smoothly performed. In addition, the fitted surface 60 formed on the holding sleeve 80 and the check valve body 81
Based on the fitting action with the fitting surface 62 formed in the above, it is possible to slowly perform this during the valve closing operation of the check valve body 81, and thus to suppress the occurrence of a water hammer. It has the same advantages as the embodiment.
【００５９】以上本発明の実施例を詳述したがこれはあ
くまで一例示であり、本発明は上例以外の様々な形態の
水栓における逆止弁装置に適用することが可能であるな
ど、その主旨を逸脱しない範囲において種々変更を加え
た形態で構成可能である。Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be applied to check valve devices in various forms of faucets other than the above examples. It can be configured in a form in which various changes are made without departing from the spirit of the invention.
【図１】本発明の一実施例である逆止弁装置を水栓への
水又は湯の供給用サプライ管の要部とともに示す図であ
る。FIG. 1 is a view showing a check valve device according to an embodiment of the present invention together with a main part of a supply pipe for supplying water or hot water to a faucet.
【図２】図１のサプライ管によって湯又は水の供給を受
けるキッチン用水栓を設置状態で示す図である。FIG. 2 is a view showing a kitchen faucet installed with hot water or water supplied by the supply pipe of FIG. 1 in an installed state.
【図３】図２のキッチン用水栓への水又は湯の供給経路
と図１の逆止弁装置の配置位置とを示す図である。3 is a diagram showing a supply path of water or hot water to the kitchen faucet of FIG. 2 and an arrangement position of the check valve device of FIG. 1.
【図４】図１の逆止弁装置における逆流防止時の作用説
明図である。FIG. 4 is an explanatory view of the operation of the check valve device of FIG. 1 when preventing backflow.
【図５】図１の逆止弁装置におけるウォーターハンマー
防止時の作用説明図である。5 is an explanatory view of the operation of the check valve device of FIG. 1 when preventing a water hammer.
【図６】本発明の他の実施例である逆止弁装置を壁付け
の湯水混合水栓とともに示す図である。FIG. 6 is a view showing a check valve device according to another embodiment of the present invention together with a hot and cold water mixing faucet with a wall.
【図７】図６の逆止弁装置の構造を拡大して示す図であ
る。FIG. 7 is an enlarged view showing the structure of the check valve device of FIG.
【図８】従来の逆止弁装置をサプライ管の要部とともに
示す図である。FIG. 8 is a view showing a conventional check valve device together with a main part of a supply pipe.
【図９】従来の逆止弁装置の図８とは異なった例を示す
図である。FIG. 9 is a diagram showing an example of a conventional check valve device different from that of FIG. 8.
１５ 通水路 ２０，７２ 逆止弁装置 ２２，８０ 保持スリーブ ３０，８１ 逆止弁体 ３４，８４ 第一弁座部 ３６，９４ 弁棒 ４０ ガイド部材 ４４，９８ 第一ばね部材 ４６，１００ 第二ばね部材 ５０，８６ 圧力逃し通路 ５２，９０ 圧力逃し弁体 ５４，８８ 第二弁座部 ５８，１０２ ばね受部 ６０ 被嵌合面 ６２ 嵌合面 ９６ ガイド部 15 Water passage 20, 72 Check valve device 22, 80 Holding sleeve 30, 81 Check valve body 34, 84 First valve seat portion 36, 94 Valve rod 40 Guide member 44, 98 First spring member 46, 100 Second Spring member 50,86 Pressure relief passage 52,90 Pressure relief valve body 54,88 Second valve seat portion 58,102 Spring receiving portion 60 Fitting surface 62 Fitting surface 96 Guide portion
Claims (5)
水の上流側から下流側に向かう順方向の流れのみを許容
し、逆方向の流れを阻止する逆止弁装置であって （イ）前記通水路の一部を成す流路を内部に有する保持
スリーブと （ロ）該保持スリーブの内面側且つ該流路上に形成され
た第一弁座部と （ハ）前記保持スリーブの内部に配置されて該保持スリ
ーブにより保持され、前記流路における水の前記順方向
の流れを許容する向きに前記第一弁座部から離間する一
方、前記逆方向の流れを阻止する向きに該第一弁座部に
当接する逆止弁体と （ニ）該逆止弁体を前記第一弁座部に当接させる向きに
付勢する第一ばね部材と （ホ）前記通水路における前記逆止弁体の上流側と下流
側とを連通させる状態に該逆止弁体を貫通して形成され
た圧力逃し通路と （ヘ）該逆止弁体の該圧力逃し通路上に設けられた第二
弁座部と （ト）該逆止弁体に組み付けられ、前記通水路における
該逆止弁体の下流側から上流側への水の漏れを許容する
向きに該第二弁座部から離間する一方、該上流側から下
流側に向かう水の漏れを阻止する向きに該第二弁座部に
対して当接する圧力逃し弁体と （チ）該圧力逃し弁体を該第二弁座部に当接させる向き
に所定のばね力で付勢する第二ばね部材とを含むことを
特徴とする逆止弁装置。1. A check valve device which is provided on a water passage and which substantially permits only a forward flow of water in the water passage from an upstream side to a downstream side and blocks a reverse flow. (A) A holding sleeve having therein a flow path forming a part of the water passage, (b) a first valve seat portion formed on the inner surface side of the holding sleeve and on the flow path, and (c) of the holding sleeve. It is disposed inside and is held by the holding sleeve, and is separated from the first valve seat portion in a direction that allows the forward flow of water in the flow path, and is arranged in a direction that blocks the reverse flow. A check valve body that abuts on the first valve seat portion; and (d) a first spring member that biases the check valve body in a direction that abuts the check valve body on the first valve seat portion. Pressure formed through the check valve body so that the upstream side and the downstream side of the check valve body communicate with each other. And (f) a second valve seat portion provided on the pressure relief passage of the check valve body and (g) assembled to the check valve body, downstream of the check valve body in the water passage. Side from the second valve seat portion in a direction that allows water leakage from the upstream side to the upstream side, and with respect to the second valve seat portion in a direction that prevents water leakage from the upstream side to the downstream side. A non-return check, comprising: a pressure relief valve element that abuts; and (h) a second spring member that biases the pressure relief valve element with a predetermined spring force in a direction to abut the second valve seat portion. Valve device.
力逃し弁体の共通の移動案内用の弁棒がそれらの軸心方
向に延びる状態で該圧力逃し弁体の側に一体的に形成さ
れ、該弁棒が位置固定に設けられたガイド部に摺動可能
に嵌合されていることを特徴とする逆止弁装置。2. The pressure relief valve body according to claim 1, wherein a valve rod for common movement guide of the check valve body and the pressure relief valve body extends in the axial direction of the check valve body and the pressure relief valve body. A check valve device, wherein the check valve device is formed, and the valve rod is slidably fitted to a guide portion that is fixedly provided.
保持スリーブに固定的に設けられていることを特徴とす
る逆止弁装置。3. The check valve device according to claim 2, wherein the guide portion is fixedly provided on the holding sleeve.
スリーブにおける前記第一弁座部に続く上流側の部分
が、前記逆止弁体の軸心方向に平行な被嵌合面として形
成される一方、該逆止弁体における該第一弁座部への当
接部に続く上流側の部分が、該被嵌合面と平行方向に所
定長さで延び、該被嵌合面に対して閉弁時に微小隙間で
嵌合する嵌合面として形成されていることを特徴とする
逆止弁装置。4. The upstream side portion of the holding sleeve following the first valve seat portion is formed as a fitted surface parallel to the axial direction of the check valve body. On the other hand, an upstream side portion of the check valve body following the contact portion with the first valve seat portion extends for a predetermined length in a direction parallel to the fitted surface, and is fitted to the fitted surface. On the other hand, a check valve device is formed as a fitting surface that fits with a minute gap when the valve is closed.
第二ばね部材が、一端部において前記圧力逃し弁体に、
他端部において前記逆止弁体に形成されたばね受部にそ
れぞれ当接させられるとともに、該圧力逃し弁体側が小
径で該逆止弁体側が大径且つ該小径側から大径側に径が
漸次増大する形状とされており、更に前記ばね受部が該
圧力逃し弁体よりも径方向外側に形成されていることを
特徴とする逆止弁装置。5. The pressure spring valve body according to claim 1, wherein the second spring member has one end portion,
The other end is brought into contact with the spring receiving portion formed on the check valve body, and the pressure relief valve body side has a small diameter and the check valve body side has a large diameter and a diameter from the small diameter side to the large diameter side. A check valve device having a shape that gradually increases, and further characterized in that the spring receiving portion is formed radially outward of the pressure relief valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7171509A JPH08338564A (en) | 1995-06-13 | 1995-06-13 | Check valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7171509A JPH08338564A (en) | 1995-06-13 | 1995-06-13 | Check valve device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08338564A true JPH08338564A (en) | 1996-12-24 |
Family
ID=15924440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7171509A Pending JPH08338564A (en) | 1995-06-13 | 1995-06-13 | Check valve device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08338564A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2781032A1 (en) * | 1998-07-08 | 2000-01-14 | Hsiao Tsung Chou | Device for regulation of water outlet from a tap or shower has an additional valve to gradually reduce any high-pressure buildup caused by the tap being closed too quickly |
| US6648010B1 (en) | 1999-02-12 | 2003-11-18 | Goodwin International Limited | Check valve plate with anti-pressure surge device |
| JP2007113753A (en) * | 2005-10-24 | 2007-05-10 | Kvk Corp | Check valve device and water supply facility |
| US7594517B2 (en) | 2003-07-31 | 2009-09-29 | Fujikin Incorporated | Gas supply facility of a chamber and a method for an internal pressure control of the chamber for which the facility is employed |
| JP2010096298A (en) * | 2008-10-17 | 2010-04-30 | Mitsubishi Electric Corp | Check valve and storage type hot water supplying unit using check valve |
| US7798167B2 (en) | 2003-10-06 | 2010-09-21 | Fujikin Incorporated | Internal pressure controller of chamber and internal pressure subject-to-control type chamber |
| KR200457727Y1 (en) * | 2009-05-19 | 2012-01-02 | 주식회사 코밸 | Valve for preventing backflow |
| CN111306393A (en) * | 2019-11-26 | 2020-06-19 | 烟台大学 | Pipeline auxiliary device for reducing water hammer |
-
1995
- 1995-06-13 JP JP7171509A patent/JPH08338564A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2781032A1 (en) * | 1998-07-08 | 2000-01-14 | Hsiao Tsung Chou | Device for regulation of water outlet from a tap or shower has an additional valve to gradually reduce any high-pressure buildup caused by the tap being closed too quickly |
| US6648010B1 (en) | 1999-02-12 | 2003-11-18 | Goodwin International Limited | Check valve plate with anti-pressure surge device |
| US7594517B2 (en) | 2003-07-31 | 2009-09-29 | Fujikin Incorporated | Gas supply facility of a chamber and a method for an internal pressure control of the chamber for which the facility is employed |
| US7798167B2 (en) | 2003-10-06 | 2010-09-21 | Fujikin Incorporated | Internal pressure controller of chamber and internal pressure subject-to-control type chamber |
| JP2007113753A (en) * | 2005-10-24 | 2007-05-10 | Kvk Corp | Check valve device and water supply facility |
| JP2010096298A (en) * | 2008-10-17 | 2010-04-30 | Mitsubishi Electric Corp | Check valve and storage type hot water supplying unit using check valve |
| KR200457727Y1 (en) * | 2009-05-19 | 2012-01-02 | 주식회사 코밸 | Valve for preventing backflow |
| CN111306393A (en) * | 2019-11-26 | 2020-06-19 | 烟台大学 | Pipeline auxiliary device for reducing water hammer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040511 |