JPH08166072A - Dual plate non-return valve - Google Patents
Dual plate non-return valveInfo
- Publication number
- JPH08166072A JPH08166072A JP33310994A JP33310994A JPH08166072A JP H08166072 A JPH08166072 A JP H08166072A JP 33310994 A JP33310994 A JP 33310994A JP 33310994 A JP33310994 A JP 33310994A JP H08166072 A JPH08166072 A JP H08166072A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve body
- box
- elastic
- spring
- 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.)
- Granted
Links
Landscapes
- Check Valves (AREA)
- Details Of Valves (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、半円板状をした２枚
の弁体を、ばねと共に１本のヒンジピンによって弁箱に
取り付けてなるウェハータイプのデュアルプレート逆止
め弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wafer type dual plate check valve in which two semi-disc shaped valve bodies are attached to a valve box together with a spring by one hinge pin.
【０００２】[0002]
【従来の技術】従来、半円板状の２枚の弁体を、ばねと
共に１本のヒンジピンによって弁箱に取り付け、常時は
弁体をばねによって閉弁位置に弾発保持し、流体圧によ
って弁体をばねの弾発力に抗して開弁位置に回動させ、
逆流が発生したときばねの弾発力と逆流圧で弁体を閉弁
するようにしたウェハータイプのデュアルプレート逆止
め弁は公知であり、例えば特公昭５４−１２６４８号公
報や実公昭６０−５１５６号公報等に開示されている。2. Description of the Related Art Conventionally, two semicircular valve bodies are attached to a valve box together with a spring by a single hinge pin, and normally the valve bodies are elastically held in a closed position by a spring, and fluid pressure is used. Rotate the valve element to the valve opening position against the elastic force of the spring,
A wafer type dual plate check valve is known in which the valve body is closed by the elastic force of the spring and the reverse flow pressure when a reverse flow occurs. For example, Japanese Patent Publication No. 54-12648 and Japanese Utility Model Publication No. 60-5156. It is disclosed in Japanese Patent Publication No.
【０００３】特公昭５４−１２６４８号公報に開示され
た逆止め弁は図１５に示すように略円筒状の弁箱(１)内
に２枚の半円板状の弁体(２)を１本のヒンジピン(３)で
回動自在に軸支し、ヒンジピン(３)に巻装されたばね
(４)で弁体を常時閉弁方向に付勢した構造を有し、２つ
のばね(４)が各弁体(２)にそれぞれ個別に作用している
ため、各弁体に作用するばね力は弁体毎に個別に働き、
一方の弁体の作動が他方の弁体の作動に影響することが
ないようになっている。The check valve disclosed in Japanese Patent Publication No. 54-12648 has two semi-disc shaped valve bodies (2) in a substantially cylindrical valve body (1) as shown in FIG. Spring rotatably supported by two hinge pins (3) and wound around the hinge pins (3)
(4) has a structure in which the valve element is always biased in the closing direction, and since the two springs (4) individually act on each valve element (2), a spring that acts on each valve element. The force works individually for each valve,
The operation of one valve body does not affect the operation of the other valve body.
【０００４】しかしながら、この公知の逆止め弁にあっ
ては、ばね(４)の押圧力が弁体(２)の中心から偏位して
負荷されており、弁体(２)の全体に均等にばね力が掛か
っていないため、ばね(４)の作用点から離れた位置で
は、シール性が低下するおそれがあった。又、開弁時に
おいて、弁体の入口側の幅がリブの幅より大であるため
流路に対する抵抗となり、好ましくなかった。更に、閉
弁時の弁体と弁座或は開弁時の弁体同志の接触間隙には
弾性体からなる構成材が介在されてないため、異音や騒
音等の発生を避けることが出来なかった。更に、ヒンジ
ピン(３)は、弁箱(１)の孔(５)に単に挿入されているの
みであり、流体の圧力変動及び槌打作用により、短期間
に孔(５)が摩耗し、長孔化して来るため、弁故障の原因
となっている。すなわちこの公知の逆止め弁では、弁体
がばね力で均等に押圧に押圧されず、閉弁時には流体抵
抗が大で、開弁又は閉弁時においては異音、騒音等を発
生し、軸受部が摩減して来る等の欠点があった。However, in this known check valve, the pressing force of the spring (4) is deviated from the center of the valve body (2) and the load is evenly distributed over the entire valve body (2). Since no spring force is applied to the spring, there is a risk that the sealability may deteriorate at a position away from the point of action of the spring (4). Further, when the valve is opened, the width of the valve body on the inlet side is larger than the width of the rib, which is not preferable because it becomes a resistance to the flow path. Furthermore, since there is no component made of an elastic material in the contact gap between the valve body and the valve seat when the valve is closed or when the valve body is open when the valve is open, it is possible to avoid noise and noise. There wasn't. Furthermore, the hinge pin (3) is simply inserted into the hole (5) of the valve box (1), and due to the pressure fluctuation and hammering action of the fluid, the hole (5) is worn in a short period of time and the Since it becomes a hole, it causes a valve failure. That is, in this known check valve, the valve body is not uniformly pressed by the spring force, the fluid resistance is large when the valve is closed, and abnormal noise, noise, etc. are generated when the valve is opened or closed. There were drawbacks such as the parts getting worn out.
【０００５】実公昭６０−５１５６号公報に開示の逆止
め弁は、弁箱に弁座となる弾性体を焼付けて形成してお
り、このような弾性体の焼付けは、弁の量産性、生産
性、コスト面で不経済である。The check valve disclosed in Japanese Utility Model Publication No. 60-5156 is formed by baking an elastic body serving as a valve seat on a valve box. Such baking of the elastic body facilitates mass production and production of the valve. It is uneconomical in terms of efficiency and cost.
【０００６】[0006]
【発明が解決しようとする課題】この発明は、閉弁時に
おける確実なシール性を確保し、開弁時の流体抵抗を軽
減すると共に、量産性、生産性に優れ、コストの低下を
図り得るデュアルプレート逆止め弁を提供せんとするも
のである。SUMMARY OF THE INVENTION The present invention secures a reliable sealing property when the valve is closed, reduces the fluid resistance when the valve is open, is excellent in mass productivity and productivity, and can reduce the cost. It is intended to provide a dual plate check valve.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
にこの発明が採った手段は、貫通する流体通路(11)を有
した弁箱(10)と、該弁箱(10)内に１本のヒンジピン(13)
に軸支され、ばね(15)で常時閉弁方向に付勢された２枚
の半円板状の弁体(14)とからなり、該弁体(14)の弁座(2
3)と圧接する弁座(12)を弁箱(10)内に形成してなるデュ
アルプレート逆止め弁において、弁箱(10)の入口側中央
に入口に向って突出した円錐状の中央リブ(16)を形成
し、該中央リブ(16)の最大幅を開弁時の弁体(14)の入口
側端面の幅と同等若しくはそれより大に形成し、２枚の
弁体(14)の背面(22)の外周部近傍に弾性緩衝材(25)を有
するストッパー(24)を複数形成すると共に、弁箱(10)の
出口側中央に弁体(14)の過回転を防止するストッパーピ
ン(26)を軸着し、前記ばね(15)はヒンジピン(13)に巻装
され、その長軸側自由端(15a)と短軸側自由端(15b)を対
称位置において弁体(14)の背面に弾接させて、弁体への
押圧力をバランスさせるようにしたことを特徴とする。Means for Solving the Problems In order to solve the above-mentioned problems, the means adopted by the present invention is a valve box (10) having a fluid passageway (11) penetrating therethrough and a valve box (10) Book Hinge Pins (13)
And a valve disc (14) of the valve disc (14), which is axially supported by the valve disc (14) and is urged by a spring (15) in a normally closing direction.
In a dual plate check valve in which a valve seat (12) that is in pressure contact with 3) is formed in the valve box (10), a conical central rib protruding toward the inlet at the center of the inlet side of the valve box (10). (16) is formed, and the maximum width of the central rib (16) is formed to be equal to or larger than the width of the inlet side end face of the valve body (14) at the time of valve opening, and two valve bodies (14) A plurality of stoppers (24) having elastic cushioning materials (25) are formed near the outer periphery of the back surface (22) of the valve (22), and a stopper for preventing excessive rotation of the valve body (14) at the center of the outlet side of the valve box (10). The pin (26) is pivotally mounted, the spring (15) is wound around the hinge pin (13), and the free end (15a) of the major axis and the free end (15b) of the minor axis are symmetrically positioned at the valve body (14). ) Is elastically contacted with the back surface of the valve body to balance the pressing force on the valve body.
【０００８】又、弁箱(10)に固着されるヒンジピン(13)
又はストッパーピン(26)の両端部をブッシュ(30)を介し
て弁箱(10)に挿嵌し、且弾性緩衝板(31)を介してプラグ
(32)でピン(13)(26)の端部を固着したことを特徴とす
る。A hinge pin (13) fixed to the valve box (10)
Alternatively, both ends of the stopper pin (26) are fitted into the valve box (10) via the bushes (30), and plugged via the elastic buffer plate (31).
It is characterized in that the ends of the pins (13) and (26) are fixed by the (32).
【０００９】更に、弁体(14)の弁座(23)を弾性材で形成
し、弾性緩衝材(25)と一体に加硫成形したことを特徴と
する。Further, the valve seat (23) of the valve body (14) is made of an elastic material and is vulcanized integrally with the elastic cushioning material (25).
【００１０】更に、弁体(14)の前面(20)を球面の一部で
形成すると共に、流路方向に平行に延びる複数の整流溝
(21)を形成したことを特徴とする。Further, the front surface (20) of the valve body (14) is formed of a part of a spherical surface, and a plurality of flow straightening grooves extending parallel to the flow passage direction are formed.
(21) is formed.
【００１１】[0011]
【作用】流路入口側より流入した流体圧で、２枚の半円
板状弁体がばねの弾発力に抗して回動され開弁される。
弁体はストッパーピンにより回り過ぎが防止されると共
に、弾性緩衝材を有するストッパーの当接により、２枚
の弁体は衝接音を発生することなく、開弁位置で停止す
る。又、流入流体の減衰又は停止により、ばねの負荷と
背圧により弁体は閉弁方向に回動され、弾性弁座が環状
弁座に着座してシールされ閉弁態勢となる。With the fluid pressure flowing from the inlet side of the flow path, the two semi-circular valve bodies are rotated against the elastic force of the springs to open the valve.
The valve element is prevented from overturning by the stopper pin, and the two valve elements stop at the valve opening position without making a collision noise due to the contact of the stopper having the elastic cushioning material. Further, due to the damping or stopping of the inflowing fluid, the valve element is rotated in the valve closing direction by the load of the spring and the back pressure, and the elastic valve seat is seated on the annular valve seat and sealed, and the valve is closed.
【００１２】更に、流路入口部中央のリブの幅を、開弁
時の２枚の弁体の入口側端面の幅と同等若しくはこれよ
り大としてあるので、弁体の入口側端面が流体抵抗とな
るのを抑制出来、流体による摩減防止を図ることが出来
る。しかも、弁体の弁座側面を球面状にし、且流路方向
に延びる複数の整流溝を形成してあるので、前記リブの
存在と相まって、流体の流れを改善することが出来る。Further, since the width of the rib at the center of the flow path inlet is equal to or larger than the width of the end faces on the inlet side of the two valve bodies when the valves are opened, the end faces on the inlet side of the valve bodies have fluid resistance. Can be suppressed, and wear due to fluid can be prevented. Moreover, since the valve seat side surface of the valve element is spherical and a plurality of flow straightening grooves extending in the flow path direction are formed, the flow of fluid can be improved in combination with the presence of the ribs.
【００１３】ヒンジピン及びストッパーピンは、その両
端固着部をブッシュを介して弁箱に挿着して、ピンの直
径方向及び軸方向の寸法差(ガタ)を無くし、且弾性緩衝
板の介在により、異音、騒音の発生を防止することが出
来る。The hinge pin and the stopper pin have both ends fixed to the valve box through bushes so as to eliminate the dimensional difference (play) in the diametrical direction and the axial direction of the pin, and by interposing an elastic buffer plate, It is possible to prevent the generation of abnormal noise and noise.
【００１４】[0014]
【発明の効果】この発明によれば、弁体開閉時及びチャ
タリング時において異音、騒音が発生せず、ヒンジピン
やストッパーピンからも異音、騒音が発生しないと共
に、圧力変動や槌打作用によりピン孔の摩耗をなくすこ
とが出来る。又、弁体のバランスのとれた開閉作動をも
たらし、流体抵抗が少なく、摩耗の小さい逆止め弁を提
供することが出来る。According to the present invention, no abnormal noise or noise is generated when the valve body is opened or closed and chattering is caused, no abnormal noise or noise is generated from the hinge pin or the stopper pin, and the pressure fluctuation or hammering action is performed. Wear of pin holes can be eliminated. Further, it is possible to provide a check valve that brings about a well-balanced opening / closing operation of the valve body, has a small fluid resistance, and has a small wear.
【００１５】[0015]
【実施例】以下に図面を参照しつつ、この発明の好まし
い実施例を詳細に説明する。図において、(10)は円筒形
状の弁箱であって、貫流する流体通路(11)を有し、配管
フランジ間に挟持して配管に取り付け自在なウェハータ
イプの構造を有する。弁箱(10)の入口側内周面には、内
径方向に向って突出した環状の弁座(12)が形成され、該
環状弁座(12)に隣接して直径方向に延びるヒンジピン(1
3)が弁箱(10)に軸着される。弁箱(10)の流出口は、円筒
状で環状弁座(12)を境にして拡大されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the drawings. In the figure, (10) is a cylindrical valve box, having a fluid passageway (11) which flows through, and has a wafer type structure which can be attached to a pipe by being sandwiched between pipe flanges. An annular valve seat (12) protruding in the inner diameter direction is formed on the inner peripheral surface of the inlet side of the valve box (10), and a hinge pin (1 extending adjacent to the annular valve seat (12) in the diametrical direction is formed.
3) is pivotally attached to the valve box (10). The outlet of the valve box (10) is cylindrical and is enlarged with the annular valve seat (12) as a boundary.
【００１６】(14)は、ヒンジピン(13)に基部を回転自在
に軸支された２枚の半円板状の弁体であって、前記環状
弁座(12)に着座して閉弁態勢となり、前記流体通路(11)
を閉止する。又入口側から負荷される流体圧力により、
図２に点線で示すように回動して、開弁態勢となり、流
体通路(11)を開放する。弁体(14)にはばね(15)の弾発力
が作用されており、弁体(14)を常時閉弁方向へ付勢して
いる。Reference numeral (14) is a semicircular disc-shaped valve element whose base is rotatably supported by a hinge pin (13), and is seated on the annular valve seat (12) to close the valve. And the fluid passage (11)
Close. Also, due to the fluid pressure applied from the inlet side,
As shown by the dotted line in FIG. 2, it rotates to open the valve and opens the fluid passage (11). The spring force of the spring (15) is applied to the valve body (14) to normally urge the valve body (14) in the valve closing direction.
【００１７】(16)は、弁箱(10)の中央を直径方向に横切
ってヒンジピン(13)と平行に配置された中央リブであっ
て、前記環状弁座(12)の弁座面から入口側に向って突出
している。弁座面と同一平面上で終端する中央リブ(16)
の下流端の幅は、前記弁体(14)が開弁態勢にあるときの
２枚の弁体(14)の軸支端の幅より大きく形成して、開弁
時に弁体(14)の軸支端面が流体に対して抵抗となるのを
抑制する。中央リブ(16)は流体の入口側先端部を略円錐
形状に突出させて、流体に対する抵抗を減少させるよう
にしてある。Reference numeral (16) is a central rib which is arranged diametrically across the center of the valve box (10) and parallel to the hinge pin (13), and which is located at the inlet of the valve seat surface of the annular valve seat (12). It projects toward the side. Central rib (16) terminating flush with valve seat surface
The width of the downstream end of the valve body (14) is formed to be larger than the width of the shaft support ends of the two valve bodies (14) when the valve body (14) is in the opening position, and the width of the valve body (14) is Suppress the resistance of the shaft support end face against the fluid. The central rib (16) projects the tip of the fluid inlet side into a substantially conical shape to reduce the resistance to the fluid.
【００１８】図３を参照して、弁体(14)に張設されるば
ね(15)は、２枚の弁体(14)に対してそれぞれ１個宛用意
される。ばね(15)はヒンジピン(13)に巻装され、長軸側
自由端(15a)を弁体(14)の中央部に、短軸側自由端(15b)
を弁体(14)の周辺部近傍に弾接させてある。２つのばね
(15)の間には、ブッシュ(17)が介挿され、２つのばねが
互いに干渉しないようになっている。Referring to FIG. 3, the springs (15) stretched over the valve body (14) are provided for each of the two valve bodies (14). The spring (15) is wound around the hinge pin (13), with the long-axis free end (15a) at the center of the valve body (14) and the short-axis free end (15b).
Is elastically contacted near the periphery of the valve body (14). Two springs
A bush (17) is interposed between (15) so that the two springs do not interfere with each other.
【００１９】弁体(14)の軸支端には円筒状の軸受ボス(1
8)が形成される。この軸受ボス(18)は、図５、６に示す
ように軸方向に間隔をおいて２個形成され、一方の軸受
ボス(18a)は弁体(14)の周辺に接して位置し、他方のボ
ス(18b)は１個のボスの軸方向の長さだけ中心に向って
ズラして位置づけられる。かくして、２枚の弁体(14)を
組み合わせたとき、２個のボス(18a)(18b)が同軸上に整
列して、軸支されるようになり、２枚の弁体(14)は実質
的に同一形状のものを用意すれば良いこととなる。又、
この内側の軸受ボス(18b)とばね(15)との間にもブッシ
ュ(19)が介挿される。A cylindrical bearing boss (1
8) is formed. As shown in FIGS. 5 and 6, two bearing bosses (18) are formed at intervals in the axial direction. One bearing boss (18a) is located in contact with the periphery of the valve body (14), and the other is formed. The boss (18b) of the boss is slid toward the center by the axial length of one boss. Thus, when the two valve bodies (14) are combined, the two bosses (18a) (18b) are coaxially aligned and are axially supported, and the two valve bodies (14) are It is only necessary to prepare those having substantially the same shape. or,
A bush (19) is also inserted between the inner bearing boss (18b) and the spring (15).
【００２０】弁体(14)の入口側と対向する面、すなわち
環状弁座(12)側の弁体前面(20)は、図６に示すように球
面の一部をもって形成されると共に、流体の流過方向に
平行に延びる複数の整流溝(21)が形成され、流体の流れ
を整流化している。図５に示すように、弁体(14)の前面
(20)にはその周辺に沿って連続して延びる弾性弁座(23)
が配設され、閉弁時に前記環状弁座(12)に圧着して、閉
弁時のシール性を確保している。弁体(14)の前記弁体前
面(20)と反対側の弁体背面(22)には前記ばね(15)の自由
端(15a)(15b)が弾発されると共に、弁体(14)の周辺部近
傍に位置して２個のストッパー(24)が形成される。該ス
トッパー(24)の当接面は弁体(14)が開弁位置にあるとき
当接するように斜面に形成されると共に、ストッパー(2
4)の中央には弾性の緩衝材(25)が突設される。(26)は、
弁体(14)の過回転を防止するためのストッパーピンであ
り、ヒンジピン(13)と平行に、弁箱(10)の流体通路(11)
の中心を横断して弁箱(10)に軸着される。The surface of the valve body (14) facing the inlet side, that is, the valve body front surface (20) on the side of the annular valve seat (12) is formed with a part of a spherical surface as shown in FIG. A plurality of rectifying grooves (21) extending parallel to the flow direction of are formed to rectify the fluid flow. As shown in FIG. 5, the front surface of the valve body (14)
The elastic valve seat (23) extends continuously along the periphery of (20).
Is disposed and is pressure-bonded to the annular valve seat (12) when the valve is closed to ensure the sealing performance when the valve is closed. The free ends (15a) and (15b) of the spring (15) are repulsed on the valve body rear surface (22) opposite to the valve body front surface (20) of the valve body (14) and the valve body (14 2), two stoppers (24) are formed in the vicinity of the periphery. The contact surface of the stopper (24) is formed as an inclined surface so as to contact when the valve body (14) is in the valve opening position, and the stopper (2)
An elastic cushioning material (25) is provided at the center of 4). (26) is
A stopper pin for preventing excessive rotation of the valve body (14), parallel to the hinge pin (13), the fluid passageway (11) of the valve box (10).
The valve box (10) is pivoted across the center of the.
【００２１】弁体(14)に配設される弾性弁座(23)と弾性
緩衝材(25)は、一体加硫により成形される。このため、
弾性弁座(23)を配設する凹所(27)は、図７に示すように
外方へ向って口部が狭くなる鳩穴形状に形成されると共
に、弾性緩衝材(25)を挿入する孔(28)は該凹所(27)に連
通されており、弾性弁座(23)と弾性緩衝材(25)は一体化
される。又、凹所(27)の形状を鳩穴形状としてあるの
で、弾性弁座(23)の抜け出しを防止することが出来る。
弾性弁座(23)は、環状弁座(12)より幅広く形成され、閉
弁時における着座を安定的且確実にしている。弾性弁座
(23)と弾性緩衝材(25)は、ＮＢＲ、ＥＰＤＭ等のエラス
トマ若しくは樹脂等で形成するのが好ましい。The elastic valve seat (23) and the elastic cushioning material (25) arranged on the valve body (14) are molded by integral vulcanization. For this reason,
The recess (27) for arranging the elastic valve seat (23) is formed in a dovetail shape in which the mouth is narrowed outward as shown in FIG. 7, and the elastic cushioning material (25) is inserted. The hole (28) which communicates with the recess (27) communicates with the elastic valve seat (23) and the elastic cushioning material (25). Further, since the recess (27) has a dovetail shape, the elastic valve seat (23) can be prevented from coming out.
The elastic valve seat (23) is formed wider than the annular valve seat (12) to ensure stable and reliable seating when the valve is closed. Elastic valve seat
(23) and the elastic cushioning material (25) are preferably formed of an elastomer such as NBR or EPDM, or a resin.
【００２２】図８は、ヒンジピン(13)又はストッパーピ
ン(26)を弁箱(10)に軸支する構造を示し、ピン(13)(26)
をブッシュ(30)に軸挿すると共に、ピン(13)(26)の先端
にＮＢＲ、ＥＰＤＭ等のエラストマ若しくは樹脂等から
なる弾性緩衝板(31)を有する。ブッシュ(30)を用いるこ
とによりピン(13)(26)の径寸法公差を無くすことが出
来、弾性緩衝板(31)を用いることにより長さ寸法の公差
を無くすことが出来る。これにより弁箱(10)の摩減を防
止することが可能になり、ピン(13)(26)のガタ付きを防
止出来る。ブッシュ(30)の交換に際して、ピン孔(29)の
貫通しないインロー部(29a)に治具を介して取り外し分
解することが可能である。FIG. 8 shows a structure in which the hinge pin (13) or the stopper pin (26) is pivotally supported on the valve box (10).
Is axially inserted into the bush (30), and the pins (13) and (26) have elastic cushioning plates (31) made of elastomer such as NBR or EPDM or resin at the tips thereof. By using the bush (30), the dimensional tolerance of the pins (13), (26) can be eliminated, and by using the elastic cushioning plate (31), the tolerance of the length dimension can be eliminated. This makes it possible to prevent wear of the valve box (10) and prevent rattling of the pins (13) and (26). When exchanging the bush (30), it is possible to dismount and disassemble the spigot part (29a) where the pin hole (29) does not penetrate through a jig.
【００２２】図９は、ばね(15)の張設の他の変形を示
し、１つの弁体にそれぞれ２個ずつばね(15)を張設する
と共に、同一のばねを長・短軸をそれぞれ反転して組み
立てたものである。その他の点は前記実施例と同一であ
る。FIG. 9 shows another modification of the tensioning of the spring (15). Two springs (15) are tensioned on each valve body, and the same spring is used for the long and short axes, respectively. It is an inverted assembly. The other points are the same as those in the above-mentioned embodiment.
【００２３】図１０〜１２は、ばね(15)の形態を示し、
図１０は組立前の無応力時の状態を、図１１は弁体に組
み付けた全閉位置の状態を、図１２は全開位置の状態を
それぞれ示す。ばね(15)は無応力時の形態のものを図１
１に示すように、捻ることにより弾発応力を発生し、流
体背圧(逆流)と協働して弁体(14)を環状弁座(12)に着座
させシールする。10 to 12 show the form of the spring (15),
FIG. 10 shows a state without stress before assembly, FIG. 11 shows a fully closed position assembled to the valve body, and FIG. 12 shows a fully open position. The spring (15) is in a stress-free form as shown in FIG.
As shown in FIG. 1, by twisting, elastic stress is generated, and the valve body (14) is seated on the annular valve seat (12) and seals in cooperation with the fluid back pressure (backflow).
【図１】１部を切り欠いた外観斜視図FIG. 1 is an external perspective view with a part cut away.
【図２】組立断面図[Fig. 2] Assembly sectional view
【図３】弁体の組立部の背面図FIG. 3 is a rear view of the assembly portion of the valve body.
【図４】分解斜視図FIG. 4 is an exploded perspective view.
【図５】弁体の前面を示す図FIG. 5 is a diagram showing a front surface of a valve body.
【図６ａ】弁体の背面を示す図FIG. 6a is a view showing the back surface of the valve body.
【図６ｂ】弁体の側面図FIG. 6b is a side view of the valve body.
【図７】図６Ａ−Ａ’線に沿った断面図FIG. 7 is a cross-sectional view taken along line 6A-A ′ of FIG.
【図８】ヒンジピン、ストッパーピンの軸着部の詳細を
示す断面図FIG. 8 is a cross-sectional view showing details of a shaft pinned portion of a hinge pin and a stopper pin.
【図９】弁体組立部の一変形を示す図FIG. 9 is a view showing a modification of the valve body assembly portion.
【図１０】無応力時のばねを示す図FIG. 10 is a view showing a spring when there is no stress.
【図１１】全閉位置のばねを示す図FIG. 11 is a diagram showing a spring in a fully closed position.
【図１２】全開位置のばねを示す図FIG. 12 is a diagram showing a spring in a fully opened position.
【図１３】弁体の一部の拡大斜視図FIG. 13 is an enlarged perspective view of a part of the valve body.
【図１４】弁体の他の一部の拡大斜視図FIG. 14 is an enlarged perspective view of another part of the valve body.
【図１５】従来の逆止め弁の正面図FIG. 15 is a front view of a conventional check valve.
(10)弁箱 (11)流体通路 (12)環状弁座 (13)ヒンジピン (14)弁体 (15)ばね (15a)長軸側自由端 (15b)短軸側自由端 (16)中央リブ (17)ブッシュ (18)軸受ボス (18a)軸受ボス (18b)軸受ボス (19)ブッシュ (20)弁体前面 (21)整流溝 (22)弁体背面 (23)弾性弁座 (24)ストッパー (25)弾性緩衝材 (26)ストッパーピン (27)凹所 (28)孔 (29)ピン孔 (29a)インロー部 (30)ブッシュ (31)弾性緩衝材 (32)プラグ (10) Valve box (11) Fluid passage (12) Annular valve seat (13) Hinge pin (14) Valve body (15) Spring (15a) Long shaft side free end (15b) Short shaft side free end (16) Center rib (17) Bush (18) Bearing boss (18a) Bearing boss (18b) Bearing boss (19) Bush (20) Valve body front surface (21) Flow control groove (22) Valve body rear surface (23) Elastic valve seat (24) Stopper (25) Elastic cushioning material (26) Stopper pin (27) Recess (28) Hole (29) Pin hole (29a) Inlay part (30) Bushing (31) Elastic cushioning material (32) Plug
Claims (4)
と、該弁箱(10)内に１本のヒンジピン(13)に軸支され、
ばね(15)で常時閉弁方向に付勢された２枚の半円板状の
弁体(14)とからなり、該弁体(14)の弁座(23)と圧接する
弁座(12)を弁箱(10)内に形成してなるデュアルプレート
逆止め弁において、弁箱(10)の入口側中央に入口に向っ
て突出した円錐状の中央リブ(16)を形成し、該中央リブ
(16)の最大幅を開弁時の弁体(14)の入口側端面の幅と同
等若しくはそれより大に形成し、２枚の弁体(14)の背面
(22)の外周部近傍に弾性緩衝材(25)を有するストッパー
(24)を複数形成すると共に、弁箱(10)の出口側中央に弁
体(14)の過回転を防止するストッパーピン(26)を軸着
し、前記ばね(15)はヒンジピン(13)に巻装され、その長
軸側自由端(15a)と短軸側自由端(15b)を対称位置におい
て弁体(14)の背面に弾接させて、弁体への押圧力をバラ
ンスさせるようにしたことを特徴とするデュアルプレー
ト逆止め弁。1. A valve box (10) having a fluid passage (11) therethrough.
And is pivotally supported by one hinge pin (13) in the valve box (10),
A valve seat (12) which is composed of two semi-disc-shaped valve bodies (14) which are normally biased by a spring (15) in the valve closing direction and which is in pressure contact with the valve seat (23) of the valve body (14). ) Is formed in the valve box (10), a conical central rib (16) protruding toward the inlet is formed at the center of the inlet side of the valve box (10), and rib
The maximum width of (16) is made equal to or larger than the width of the inlet side end face of the valve body (14) at the time of opening the valve, and the rear surface of the two valve bodies (14)
Stopper having elastic cushioning material (25) near the outer periphery of (22)
A plurality of (24) are formed, and a stopper pin (26) for preventing excessive rotation of the valve body (14) is axially attached to the center of the outlet side of the valve box (10), and the spring (15) is a hinge pin (13). The free end (15a) on the long axis side and the free end (15b) on the short axis side are elastically contacted with the back surface of the valve body (14) at symmetrical positions to balance the pressing force on the valve body. The dual plate check valve is characterized by
はストッパーピン(26)の両端部をブッシュ(30)を介して
弁箱(10)に挿嵌し、且弾性緩衝板(31)を介してプラグ(3
2)でピン(13)(26)の端部を固着したことを特徴とする請
求項(１)記載の逆止め弁。2. A hinge pin (13) or a stopper pin (26) fixed to the valve box (10) is inserted into the valve box (10) through bushes (30), and an elastic cushion plate ( 31) via plug (3
The check valve according to claim 1, characterized in that the ends of the pins (13) and (26) are fixed to each other by means of 2).
弾性緩衝材(25)と一体に加硫成形したことを特徴とする
請求項(１)又は(２)記載の逆止め弁。3. The valve seat (23) of the valve body (14) is made of an elastic material,
The check valve according to claim (1) or (2), characterized by being vulcanized and molded integrally with the elastic cushioning material (25).
すると共に、流路方向に平行に延びる複数の整流溝(21)
を形成したことを特徴とする請求項(１)(２)又は(３)記
載の逆止め弁。4. A plurality of flow-rectifying grooves (21), each of which has a front surface (20) of the valve body (14) formed of a part of a spherical surface and which extends in parallel to the flow direction.
The check valve according to claim 1, wherein the check valve is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06333109A JP3121513B2 (en) | 1994-12-14 | 1994-12-14 | Dual plate check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06333109A JP3121513B2 (en) | 1994-12-14 | 1994-12-14 | Dual plate check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08166072A true JPH08166072A (en) | 1996-06-25 |
| JP3121513B2 JP3121513B2 (en) | 2001-01-09 |
Family
ID=18262390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06333109A Expired - Fee Related JP3121513B2 (en) | 1994-12-14 | 1994-12-14 | Dual plate check valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3121513B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007135744A1 (en) * | 2006-05-24 | 2007-11-29 | Tomoe Technical Research Company Ltd. | Check valve |
| CN100353103C (en) * | 2004-11-18 | 2007-12-05 | 中国核动力研究设计院 | Full flow buffer check valve |
| WO2009066411A1 (en) * | 2007-11-22 | 2009-05-28 | Tozen Corporation | Quick closing check valve with noise elimination function |
| JP2012087802A (en) * | 2006-06-23 | 2012-05-10 | Chun-Hsiung Chang | Method and device for controlling air flow in engine |
| CN104405932A (en) * | 2014-09-19 | 2015-03-11 | 孙建林 | Double-disc butterfly type check valve |
| KR20160135417A (en) * | 2015-05-18 | 2016-11-28 | 양정승 | Dual plate check valve |
| CN112923106A (en) * | 2020-11-16 | 2021-06-08 | 天津澳特斯阀门制造有限公司 | Novel butterfly type double-plate check valve |
| KR20220129757A (en) * | 2021-03-17 | 2022-09-26 | 권철주 | Fold Type Disk Butterfly Valve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3181969B1 (en) * | 2015-12-14 | 2019-08-07 | Hamilton Sundstrand Corporation | Check valve |
-
1994
- 1994-12-14 JP JP06333109A patent/JP3121513B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100353103C (en) * | 2004-11-18 | 2007-12-05 | 中国核动力研究设计院 | Full flow buffer check valve |
| WO2007135744A1 (en) * | 2006-05-24 | 2007-11-29 | Tomoe Technical Research Company Ltd. | Check valve |
| JP2012087802A (en) * | 2006-06-23 | 2012-05-10 | Chun-Hsiung Chang | Method and device for controlling air flow in engine |
| WO2009066411A1 (en) * | 2007-11-22 | 2009-05-28 | Tozen Corporation | Quick closing check valve with noise elimination function |
| CN104405932A (en) * | 2014-09-19 | 2015-03-11 | 孙建林 | Double-disc butterfly type check valve |
| KR20160135417A (en) * | 2015-05-18 | 2016-11-28 | 양정승 | Dual plate check valve |
| CN112923106A (en) * | 2020-11-16 | 2021-06-08 | 天津澳特斯阀门制造有限公司 | Novel butterfly type double-plate check valve |
| CN112923106B (en) * | 2020-11-16 | 2022-07-12 | 天津澳特斯阀门制造有限公司 | Novel butterfly type double-plate check valve |
| KR20220129757A (en) * | 2021-03-17 | 2022-09-26 | 권철주 | Fold Type Disk Butterfly Valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3121513B2 (en) | 2001-01-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |