JP2022046870A - Check valve - Google Patents

Check valve Download PDF

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JP2022046870A
JP2022046870A JP2020152477A JP2020152477A JP2022046870A JP 2022046870 A JP2022046870 A JP 2022046870A JP 2020152477 A JP2020152477 A JP 2020152477A JP 2020152477 A JP2020152477 A JP 2020152477A JP 2022046870 A JP2022046870 A JP 2022046870A
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valve
flow path
disc
auxiliary
valve seat
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JP7506918B2 (en
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英範 窪
Hidenori Kubo
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TLV Co Ltd
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TLV Co Ltd
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Abstract

To provide a check valve which can secure a sufficient flow rate of fluid when a valve is opened.SOLUTION: When fluid such as drain flows in an arrow-91 direction from a flow-in port 51, a disc valve 2 moves in a direction separating from a valve seat face 9 in parallel therewith, and is valve-opened (valve-opening state). By the valve-opening of the disc valve 2, the flow-in drain or the like passes external peripheral spaces at eight points which are formed at an external periphery of the disc valve 2, and is discharged along an outside flow passage 92. Also, at the same time, the disc valve 2 is separated from a sub-valve seat face 3a of a sub-valve seat 3, a center hole 2a of the disc valve 2 is released, the flow-in drain or the like passes the center hole 2a of the disc valve 2, and is discharged along an inside flow passage 93. As above, the drain or the like is discharged along the outside flow passage 92 and the inside flow passage 93 being a plurality of different paths.SELECTED DRAWING: Figure 1

Description

本願に係る逆止弁は、弁体が移動することによって開弁又は閉弁を行う逆止弁の構成の技術に関する。 The check valve according to the present application relates to a technique for constructing a check valve that opens or closes a valve by moving the valve body.

逆止弁は、流体の流路に設けられる弁であり、流体の背圧による逆流を防止する機構を備えている。たとえば、産業プラントに設置されている配管は高温・高圧の蒸気を移送し、この配管内には蒸気と共に、蒸気から発生したドレン（凝縮水）が所定の方向（順方向）に流れている。 The check valve is a valve provided in the flow path of the fluid and has a mechanism for preventing backflow due to the back pressure of the fluid. For example, a pipe installed in an industrial plant transfers high-temperature and high-pressure steam, and drain (condensed water) generated from the steam flows in this pipe in a predetermined direction (forward direction) together with the steam.

このような蒸気やドレンの逆流を防止するために、配管上の必要箇所に逆止弁が設けられる。逆止弁には、構造上、様々な方式があり、スイング式逆止弁、リフト式逆止弁、ディスク式逆止弁等が知られている。 In order to prevent such backflow of steam and drain, check valves are provided at necessary points on the piping. There are various types of check valves in terms of structure, and swing type check valves, lift type check valves, disc type check valves and the like are known.

この中、たとえばディスク式逆止弁は、本体内に弁座及び移動可能に配置された円盤状のディスク弁を内蔵している。このディスク弁は、逆止弁の本体に形成された流路を遮るように位置しており、コイルバネによって、弁座の弁座面に接する方向に付勢されている。 Among these, for example, the disc type check valve has a valve seat and a disk-shaped disc valve movably arranged in the main body. This disc valve is positioned so as to block the flow path formed in the main body of the check valve, and is urged by a coil spring in a direction in contact with the valve seat surface of the valve seat.

ドレン等の流体が順方向に向けて逆止弁の流入口から流入した場合、流体の入口側である一次側の圧力が、出口側である二次側の圧力よりも大きくなる。これによってコイルバネは圧縮され、ディスク弁は弁座から離れる方向に平行移動して流路を開放して開弁し、ドレン等の順方向への流れを許容する。そして、ドレン等は本体の内面とディスク弁の側面との間の隙間を通過し、逆止弁の流出口から流出する。 When a fluid such as a drain flows in from the inflow port of the check valve in the forward direction, the pressure on the primary side, which is the inlet side of the fluid, becomes higher than the pressure on the secondary side, which is the outlet side. As a result, the coil spring is compressed, and the disc valve moves in parallel in the direction away from the valve seat to open the flow path and open the valve, allowing forward flow of drain and the like. Then, the drain or the like passes through the gap between the inner surface of the main body and the side surface of the disc valve, and flows out from the outlet of the check valve.

これに対して、ドレン等に逆流が生じて流出口から逆流方向にドレン等が侵入した場合、この逆流によって一次側圧力が二次側圧力よりも小さくなる。これによってディスク弁は、流体の圧力とコイルバネの付勢力を受けて平行移動し、弁座の弁座面に接して流路を閉塞して閉弁し、ドレン等の流体の逆流は逆止弁で遮られる。 On the other hand, when a backflow occurs in the drain or the like and the drain or the like invades from the outlet in the backflow direction, the primary side pressure becomes smaller than the secondary side pressure due to this backflow. As a result, the disc valve moves in parallel under the pressure of the fluid and the urging force of the coil spring, contacts the valve seat surface of the valve seat, closes the flow path and closes the valve, and the backflow of the fluid such as drain is a check valve. It is blocked by.

このようなディスク式逆止弁として、後記特許文献１に開示されている技術がある。この特許文献１に開示されている逆止弁においては、入口側部材2と出口側部材4から弁ケーシングを構成し、この弁ケーシングに入口1と弁室5と出口3を形成している。そして、入口1と弁室5の間に金属製の環状弁座6を設けている（特許文献1、明細書段落番号［0009］）。そして、環状弁座6に離着座するディスク状弁体7を弁室5内に配置し、ディスク状弁体7を環状弁座6へ付勢するコイルバネ8を設けている。（特許文献1、明細書段落番号［0009］）。 As such a disc type check valve, there is a technique disclosed in Patent Document 1 described later. In the check valve disclosed in Patent Document 1, a valve casing is composed of an inlet-side member 2 and an outlet-side member 4, and an inlet 1, a valve chamber 5, and an outlet 3 are formed in the valve casing. A metal annular valve seat 6 is provided between the inlet 1 and the valve chamber 5 (Patent Document 1, Specification Paragraph No. [0009]). A disc-shaped valve body 7 that takes off and seats on the annular valve seat 6 is arranged in the valve chamber 5, and a coil spring 8 that urges the disc-shaped valve body 7 to the annular valve seat 6 is provided. (Patent Document 1, Specification Paragraph No. [0009]).

入口1の流体圧力が出口3の流体圧力及びコイルバネ8の付勢力よりも大きくなると、ディスク状弁体7がコイルバネ8を圧縮して環状弁座6から離座して開弁し、流体がディスク状弁体7の外周を通って出口5に流れる。これに対して、入口1の流体圧力が出口3の流体圧力及びコイルバネ8の付勢力よりも小さくなると、ディスク状弁体7が入口1側に変位して環状弁座6に着座して閉弁し、出口3から入口1への流体の逆流が防止される（特許文献1、明細書段落番号［0012］）。 When the fluid pressure at the inlet 1 becomes larger than the fluid pressure at the outlet 3 and the urging force of the coil spring 8, the disc-shaped valve body 7 compresses the coil spring 8 and separates from the annular valve seat 6 to open the valve, and the fluid discs. It flows to the outlet 5 through the outer circumference of the valve body 7. On the other hand, when the fluid pressure at the inlet 1 becomes smaller than the fluid pressure at the outlet 3 and the urging force of the coil spring 8, the disc-shaped valve body 7 is displaced toward the inlet 1 and sits on the annular valve seat 6 to close the valve. However, the backflow of the fluid from the outlet 3 to the inlet 1 is prevented (Patent Document 1, Specification Paragraph No. [0012]).

特開2014-47905号公報Japanese Unexamined Patent Publication No. 2014-47905

しかし、前述の特許文献１に開示された技術においては、開弁した際、流体はディスク状弁体7の外周を通って出口5に流れるのみである。このため、流体の十分な流量を確保することができない場合がある。 However, in the technique disclosed in Patent Document 1 described above, when the valve is opened, the fluid only flows to the outlet 5 through the outer periphery of the disc-shaped valve body 7. Therefore, it may not be possible to secure a sufficient flow rate of the fluid.

そこで本願に係る逆止弁は、開弁した際、流体の十分な流量を確保することができる逆止弁の提供を目的とする。 Therefore, the check valve according to the present application is intended to provide a check valve capable of ensuring a sufficient flow rate of fluid when the valve is opened.

本願に係る逆止弁は、
流体が一次側から二次側に向かって通過する流路、及び当該流路に連通する弁室部を有する本体、
弁室部内に移動可能に位置しており、弁室部に設けられた弁座部に当接可能な弁体手段であって、一次側から二次側に通過する流体の流れを受けて移動し、弁座部と離隔することによって、外周部分に形成される外周流路を開放して開弁状態になり、二次側から一次側に向かう逆流方向の流体の流れを受けて移動し、弁座部に当接することによって、外周部分に形成される外周流路を閉塞して閉弁状態になる弁体手段、
を備えた逆止弁において、
弁室部には、弁体手段と当接可能である補助弁座部が設けられており、
弁体手段には、外周流路とは異なる経路である補助流路を形成させる補助流路空間が形成されており、
弁体手段が開弁状態にあるとき、弁体手段は補助弁座部と離隔することによって補助流路空間を開放して補助流路を形成し、
弁体手段が閉弁状態にあるとき、弁体手段は補助弁座部に当接することによって補助流路を閉塞する、
ことを特徴とする。 The check valve according to the present application is
A flow path through which the fluid passes from the primary side to the secondary side, and a main body having a valve chamber portion communicating with the flow path.
It is a valve body means that is movably located in the valve chamber and can come into contact with the valve seat provided in the valve chamber, and moves by receiving the flow of fluid passing from the primary side to the secondary side. However, by separating from the valve seat portion, the outer peripheral flow path formed in the outer peripheral portion is opened to open the valve, and the fluid moves in the backflow direction from the secondary side to the primary side. A valve body means that closes the outer peripheral flow path formed in the outer peripheral portion by abutting on the valve seat portion and closes the valve.
In a check valve equipped with
The valve chamber is provided with an auxiliary valve seat that can come into contact with the valve body means.
The valve body means is formed with an auxiliary flow path space that forms an auxiliary flow path that is a path different from the outer peripheral flow path.
When the valve body means is in the valve open state, the valve body means separates from the auxiliary valve seat portion to open the auxiliary flow path space and form the auxiliary flow path.
When the valve body means is in the closed state, the valve body means closes the auxiliary flow path by abutting on the auxiliary valve seat portion.
It is characterized by that.

本願に係る逆止弁においては、弁体手段が開弁状態にあるとき、弁体手段は弁座部と離隔して外周部分に形成される外周流路を開放すると共に、補助弁座部と離隔して補助流路空間を開放して、外周流路とは異なる経路である補助流路を形成する。 In the check valve according to the present application, when the valve body means is in the valve open state, the valve body means separates from the valve seat portion and opens the outer peripheral flow path formed in the outer peripheral portion, and also with the auxiliary valve seat portion. The auxiliary flow path space is opened at a distance to form an auxiliary flow path that is a different path from the outer peripheral flow path.

すなわち、弁体手段が開弁状態にあるとき、外周流路と共に外周流路とは異なる経路である補助流路が形成され、これらの流路を流体が通過する。したがって、開弁した際、流体の十分な流量を確保することができる。 That is, when the valve body means is in the valve open state, an auxiliary flow path different from the outer peripheral flow path is formed together with the outer peripheral flow path, and the fluid passes through these flow paths. Therefore, when the valve is opened, a sufficient flow rate of the fluid can be secured.

本願に係る逆止弁の第１の実施形態であるディスク式逆止弁1を示す一部断面図であって、開弁時の状態を示す一部断面図である。It is a partial cross-sectional view which shows the disk type check valve 1 which is the 1st Embodiment of the check valve which concerns on this application, and is the partial sectional view which shows the state at the time of valve opening. 図１に示すII―II方向の矢視断面図である。FIG. 2 is a cross-sectional view taken along the arrow in the II-II direction shown in FIG. 図１に示すディスク式逆止弁1の閉弁時の状態を示す一部断面図である。FIG. 3 is a partial cross-sectional view showing a state when the disc type check valve 1 shown in FIG. 1 is closed.

［実施形態における用語説明］
以下の実施形態において示す主な用語は、それぞれ本願に係る逆止弁の下記の構成要素に対応している。 [Explanation of terms in the embodiment]
The main terms shown in the following embodiments correspond to the following components of the check valve according to the present application, respectively.

ディスク式逆止弁1・・・逆止弁
ディスク弁2・・・弁体手段
中心穴2a・・・補助流路空間、貫通孔
副弁座3・・・補助弁座部
支持バー4・・・固定部材
弁室7・・・弁室部
弁室7、流入口51及び流出口52・・・流路
第一ボディー11及び第二ボディー12・・・本体
第一ボディー11の二次側の端部・・・弁座部
流入口51側・・・一次側
流出口52側・・・二次側
外側流路92・・・外周流路
内側流路93・・・補助流路
ドレン等・・・流体
矢印95方向・・・逆流方向 Disc type check valve 1 ・ ・ ・ Check valve Disc valve 2 ・ ・ ・ Valve body means Center hole 2a ・ ・ ・ Auxiliary flow path space, through hole Sub valve seat 3 ・ ・ ・ Auxiliary valve seat support bar 4 ・ ・・ Fixing member Valve chamber 7 ・ ・ ・ Valve chamber part Valve chamber 7, inlet 51 and outlet 52 ・ ・ ・ Flow path First body 11 and second body 12 ・ ・ ・ Main body On the secondary side of the first body 11. End: Valve seat Inlet 51 side: Primary side Outlet 52 side: Secondary side Outer flow path 92: Outer flow path Inner flow path 93: Auxiliary flow path Drain, etc.・ ・ Fluid arrow 95 direction ・ ・ ・ Backflow direction

［第１の実施形態］
本願に係る逆止弁の第１の実施形態であるディスク式逆止弁1を図面に基づいて説明する。本実施形態では、ディスク式逆止弁1を蒸気移送のための配管系統に設置する例を示す。配管内には蒸気と共に蒸気から発生したドレンが流れており、ディスク式逆止弁1はこのドレン等の逆流を防止する。 [First Embodiment]
The disc type check valve 1, which is the first embodiment of the check valve according to the present application, will be described with reference to the drawings. In this embodiment, an example in which the disc type check valve 1 is installed in a piping system for steam transfer is shown. A drain generated from the steam flows in the pipe together with the steam, and the disc type check valve 1 prevents the backflow of the drain and the like.

（ディスク式逆止弁1の構成の説明）
図１に示すように、ディスク式逆止弁1は第一ボディー11及び第二ボディー12を有しており、内部に弁室7を形成して構成されている。第一ボディー11と第二ボディー12とはネジ部13で結合され、ガスケット90を挟むことによって弁室7の気密性を保っている。 (Explanation of the configuration of the disc type check valve 1)
As shown in FIG. 1, the disc type check valve 1 has a first body 11 and a second body 12, and is configured by forming a valve chamber 7 inside. The first body 11 and the second body 12 are connected by a screw portion 13, and the airtightness of the valve chamber 7 is maintained by sandwiching the gasket 90.

第一ボディー11には流入口51が貫通して形成されて弁室７に連通しており、流入口51の外側から配管（図示せず）が接続され、流入口51を通じてドレン等が矢印91方向に沿って弁室７に流入する。また、第二ボディー12には流出口52が貫通して形成されて弁室７に連通しており、流出口52の外側に排出管（図示せず）が接続されてドレン等が矢印94方向に沿って弁室７から排出される。なお、本実施形態において、流入口51側が一次側であり、流出口52側が二次側である。弁室7を形成する第一ボディー11の二次側の端部は弁座として機能し、この二次側部分の端面が弁座面9である。 An inflow port 51 is formed through the first body 11 to communicate with the valve chamber 7, a pipe (not shown) is connected from the outside of the inflow port 51, and a drain or the like is indicated by an arrow 91 through the inflow port 51. It flows into the valve chamber 7 along the direction. Further, the outlet 52 is formed through the second body 12 and communicates with the valve chamber 7, and a discharge pipe (not shown) is connected to the outside of the outlet 52 so that the drain or the like is directed in the direction of arrow 94. It is discharged from the valve chamber 7 along the above. In this embodiment, the inlet 51 side is the primary side and the outlet 52 side is the secondary side. The secondary end of the first body 11 forming the valve chamber 7 functions as a valve seat, and the end surface of this secondary portion is the valve seat surface 9.

弁室7にはディスク弁2が設けられている。このディスク弁2の中心線60は矢印91方向に沿って配置されており、ディスク弁2は弁室7内において中心線60の配置方向に往復して移動自在である。 A disc valve 2 is provided in the valve chamber 7. The center line 60 of the disc valve 2 is arranged along the direction of the arrow 91, and the disc valve 2 can move back and forth in the valve chamber 7 in the arrangement direction of the center line 60.

ディスク弁2は円盤形状を有しており、図2に示すように外周側面に等間隔をもって8つの外周突起21が設けられている。各外周突起21は、弁室7の内周面7aに近接して位置している。そして、各外周突起21の間に8箇所の外周空間25が形成されている。さらに、ディスク弁2の中央部には中心穴2aが形成されている。この中心穴2aの中心はディスク弁2の中心線60に一致するように構成されている。 The disc valve 2 has a disk shape, and as shown in FIG. 2, eight outer peripheral protrusions 21 are provided on the outer peripheral side surface at equal intervals. Each outer peripheral protrusion 21 is located close to the inner peripheral surface 7a of the valve chamber 7. Eight outer peripheral spaces 25 are formed between the outer peripheral protrusions 21. Further, a center hole 2a is formed in the central portion of the disc valve 2. The center of the center hole 2a is configured to coincide with the center line 60 of the disc valve 2.

図1に示すように、弁室7にはバネ受17が固定されて設けられている。バネ受17は、十字型に延びる4本のバネ受脚17aを有しており、この4本のバネ受脚17aの先端部が第二ボディー12の内壁に固定されている。バネ受17とディスク弁2との間にはコイルバネ15が取り付けられている。このコイルバネ15によってディスク弁2は弁座面9に向けて付勢される。 As shown in FIG. 1, a spring receiver 17 is fixedly provided in the valve chamber 7. The spring receiver 17 has four spring receiver legs 17a extending in a cross shape, and the tips of the four spring receiver legs 17a are fixed to the inner wall of the second body 12. A coil spring 15 is attached between the spring receiver 17 and the disc valve 2. The coil spring 15 urges the disc valve 2 toward the valve seat surface 9.

バネ受17の中心部には支持バー4が固定されている。この支持バー4の軸線はディスク弁2の中心線60に一致するよう配置されている。そして、支持バー4はディスク弁2の中心穴2aを貫通して配置されており、先端に副弁座3が固定されている。副弁座3の中心もディスク弁2の中心線60に一致するよう構成されている。 A support bar 4 is fixed to the center of the spring receiver 17. The axis of the support bar 4 is arranged so as to coincide with the center line 60 of the disc valve 2. The support bar 4 is arranged so as to penetrate the center hole 2a of the disc valve 2, and the auxiliary valve seat 3 is fixed to the tip thereof. The center of the auxiliary valve seat 3 is also configured to coincide with the center line 60 of the disc valve 2.

副弁座3の一次側の正面は、中心部から外周に向けて副弁座3の厚みが漸次薄くなるようなだらかに傾斜する球面状の曲面として構成されている。そして、二次側の背面は平坦な副弁座面3aであり、この副弁座面3aは上述の弁座面9と同一平面上に配置されている。なお、副弁座面3aは、ディスク弁2に形成されている中心穴2aよりも大きな面積を備えており、ディスク弁2が副弁座面3aに当接した際、副弁座面3aが中心穴2aを完全に覆うように構成されている。 The front surface of the primary side of the auxiliary valve seat 3 is configured as a spherical curved surface that is gently inclined so that the thickness of the auxiliary valve seat 3 gradually decreases from the central portion to the outer periphery. The back surface of the secondary side is a flat sub-valve seat surface 3a, and the sub-valve seat surface 3a is arranged on the same plane as the above-mentioned valve seat surface 9. The sub-valve seat surface 3a has a larger area than the center hole 2a formed in the disc valve 2, and when the disc valve 2 comes into contact with the sub-valve seat surface 3a, the sub-valve seat surface 3a becomes larger. It is configured to completely cover the center hole 2a.

（ディスク式逆止弁1の動作の説明）
続いて、ディスク式逆止弁1の動作を説明する。流入口51からディスク式逆止弁1にドレン等の流体が矢印91方向に流入した場合、まずドレン等は副弁座3の球面状の曲面に衝突し、この球面状の曲面に沿って円滑に案内され、副弁座3の外周と弁座面9との間に形成されている空間から侵入し、ディスク弁2を加圧する。 (Explanation of operation of disc type check valve 1)
Subsequently, the operation of the disc type check valve 1 will be described. When a fluid such as drain flows from the inflow port 51 into the disk-type check valve 1 in the direction of arrow 91, the drain or the like first collides with the spherical curved surface of the auxiliary valve seat 3 and smoothly follows the spherical curved surface. Guided by, it invades from the space formed between the outer circumference of the auxiliary valve seat 3 and the valve seat surface 9, and pressurizes the disc valve 2.

これによって、弁室7内のディスク弁2は弁座面9から離れる方向に平行移動し、図１に示すように開弁する（開弁状態）。このとき、コイルバネ15は圧縮された状態になる。 As a result, the disc valve 2 in the valve chamber 7 moves in parallel in the direction away from the valve seat surface 9 and opens as shown in FIG. 1 (valve open state). At this time, the coil spring 15 is in a compressed state.

ディスク弁2が開弁することによって、流入したドレン等は、ディスク弁2の外周に形成された8箇所の外周空間25を通ってディスク弁2の裏側に回り込み、さらにバネ受17の十字型に延びる4本のバネ受脚17aの間を通過し、外側流路92に沿って流出口52から矢印94方向に排出される。 When the disc valve 2 is opened, the inflowing drain or the like wraps around to the back side of the disc valve 2 through the eight outer peripheral spaces 25 formed on the outer circumference of the disc valve 2, and further forms a cross shape of the spring receiver 17. It passes between the four extending spring receiving legs 17a and is discharged from the outlet 52 in the direction of arrow 94 along the outer flow path 92.

また、ディスク弁2が開弁することによって、同時にディスク弁2は副弁座3の副弁座面3aからも離れ、ディスク弁2の中心穴2aが開放される。これによって、流入したドレン等はディスク弁2の中心穴2aを通ってバネ受17の十字型に延びる4本のバネ受脚17aの間を通過し、内側流路93に沿って流出口52から矢印94方向に排出される。 Further, when the disc valve 2 is opened, the disc valve 2 is separated from the sub valve seat surface 3a of the sub valve seat 3 at the same time, and the center hole 2a of the disc valve 2 is opened. As a result, the inflowing drain or the like passes through the center hole 2a of the disc valve 2 and between the four spring receiving legs 17a extending in a cross shape of the spring receiving 17, and from the outlet 52 along the inner flow path 93. It is discharged in the direction of arrow 94.

このように、ディスク弁2が開弁した場合、流入したドレン等は外側流路92に沿って排出されると同時に、内側流路93に沿って排出される。すなわち、異なる複数の経路である外側流路92及び内側流路93に沿って排出されるため、開弁した際、ドレン等の流体の十分な流量を確保することができる。 In this way, when the disc valve 2 is opened, the drain or the like that has flowed in is discharged along the outer flow path 92 and at the same time is discharged along the inner flow path 93. That is, since the fluid is discharged along the outer flow path 92 and the inner flow path 93, which are a plurality of different paths, a sufficient flow rate of a fluid such as a drain can be ensured when the valve is opened.

これに対して、流出口52から図3に示す矢印95方向にドレン等が逆流して侵入した場合、この逆流はバネ受17の十字型に延びる4本のバネ受脚17aの間を通過してディスク弁2の裏側に達する。そして、ドレン等の逆流による圧力とコイルバネ15の付勢力を受けてディスク弁2は平行移動する。 On the other hand, when a drain or the like flows backward from the outlet 52 in the direction of arrow 95 shown in FIG. 3 and enters, this backflow passes between the four spring receiving legs 17a extending in the cross shape of the spring receiving 17. To reach the back side of the disc valve 2. Then, the disc valve 2 moves in parallel due to the pressure due to the backflow of the drain or the like and the urging force of the coil spring 15.

このディスク弁2の平行移動によってディスク弁2は弁座面9に接し、図3に示すように閉弁する（閉弁状態）。また、このとき同時にディスク弁2は副弁座3の副弁座面3aにも接し、ディスク弁2の中心穴2aが閉塞される。これによって、外側流路92及び内側流路93は遮断され、ドレン等の逆流が防止される。 Due to the translation of the disc valve 2, the disc valve 2 comes into contact with the valve seat surface 9 and closes as shown in FIG. 3 (valve closed state). At the same time, the disc valve 2 also comes into contact with the sub-valve seat surface 3a of the sub-valve seat 3, and the center hole 2a of the disc valve 2 is closed. As a result, the outer flow path 92 and the inner flow path 93 are blocked, and backflow such as drainage is prevented.

なお、上述のように中心穴2aの中心点はディスク弁2の中心線60に一致するよう形成されており、かつ副弁座3の中心線及びこの副弁座3を支持する支持バー4の軸線も同様にディスク弁2の中心に一致するよう配置されている。このため、開弁時において、内側流路93はディスク弁2に対して偏りなく形成され、ドレン等はディスク弁2の中心穴2aをバランスよく通過する。したがって、ディスク弁2がドレン等の偏った流体圧の影響を受けて弁室7内で斜め方向にずれる等、不都合を生じることはない。 As described above, the center point of the center hole 2a is formed so as to coincide with the center line 60 of the disc valve 2, and the center line of the sub valve seat 3 and the support bar 4 supporting the sub valve seat 3 are supported. The axis line is also arranged so as to coincide with the center of the disc valve 2. Therefore, when the valve is opened, the inner flow path 93 is formed evenly with respect to the disc valve 2, and the drain or the like passes through the center hole 2a of the disc valve 2 in a well-balanced manner. Therefore, there is no inconvenience such as the disc valve 2 being affected by a biased fluid pressure such as a drain and being displaced in the valve chamber 7 in an oblique direction.

［その他の実施形態］
前述の実施形態においては、ディスク弁2がコイルバネ15によって弁座面９に向けて付勢されているスプリング式のディスク式逆止弁１に、本願に係る逆止弁を適用した例を示したが、コイルバネ15を備えていないディスク式逆止弁に適用してもよい。 [Other embodiments]
In the above-described embodiment, an example is shown in which the check valve according to the present application is applied to the spring-type disc-type check valve 1 in which the disc valve 2 is urged toward the valve seat surface 9 by the coil spring 15. However, it may be applied to a disc type check valve that does not have a coil spring 15.

また、前述の実施形態においては、弁体手段としてディスク弁2を例示したが、弁室部に移動可能に設けられており、弁座部及び補助弁座部に離隔又は当接することによって弁の開閉を行うものであれば他の形状、構造のものを採用することができる。 Further, in the above-described embodiment, the disc valve 2 is exemplified as the valve body means, but the disc valve 2 is provided so as to be movable in the valve chamber portion, and the valve can be separated or contacted with the valve seat portion and the auxiliary valve seat portion. Other shapes and structures can be adopted as long as they are opened and closed.

たとえば、前述の実施形態においては、ディスク弁2の外周側面に等間隔をもって8つの外周突起21が設けられ、8箇所の外周空間25が形成されている例を示したが、7つ以下又は9つ以上の外周突起を設けることもできる。 For example, in the above-described embodiment, eight outer peripheral protrusions 21 are provided at equal intervals on the outer peripheral side surface of the disc valve 2, and eight outer peripheral spaces 25 are formed. However, seven or less or 9 are shown. It is also possible to provide one or more outer peripheral protrusions.

また、前述の実施形態においては、補助弁座部として支持バー4に支持された副弁座3を例示したが、他の形状、構造のものを採用することができる。たとえば、支持バー4による支持ではなく第一ボディー11（本体）の内壁に直接固定された補助弁座部を採用してもよい。 Further, in the above-described embodiment, the auxiliary valve seat 3 supported by the support bar 4 is exemplified as the auxiliary valve seat portion, but other shapes and structures can be adopted. For example, an auxiliary valve seat portion directly fixed to the inner wall of the first body 11 (main body) may be adopted instead of being supported by the support bar 4.

さらに、ディスク弁2に補助流路空間として中心穴2aが形成されている例を示したが、他の形状、構造のものを採用することができる。たとえば、複数の貫通穴を補助流路空間として弁体手段に形成してもよい。 Further, although an example in which the central hole 2a is formed in the disk valve 2 as an auxiliary flow path space is shown, those having other shapes and structures can be adopted. For example, a plurality of through holes may be formed in the valve body means as auxiliary flow path spaces.

また、前述の実施形態においては、二つの異なる経路である外側流路92及び内側流路93に沿ってドレン等の流体が流出する例を掲げたが、三つ以上の経路を形成して流体を流出させることもできる。 Further, in the above-described embodiment, an example in which a fluid such as a drain flows out along two different paths, the outer flow path 92 and the inner flow path 93, is shown, but three or more paths are formed to form the fluid. Can also be leaked.

1：ディスク式逆止弁 2：ディスク弁 2a：中心穴 3：副弁座
4：支持バー 7：弁室 11：第一ボディー 12：第二ボディー
51：流入口 52：流出口 92：外側流路 93：内側流路

1: Disc type check valve 2: Disc valve 2a: Center hole 3: Sub valve seat
4: Support bar 7: Valve chamber 11: First body 12: Second body
51: Inlet 52: Outlet 92: Outer flow path 93: Inner flow path

Claims (3)

流体が一次側から二次側に向かって通過する流路、及び当該流路に連通する弁室部を有する本体、
弁室部内に移動可能に位置しており、弁室部に設けられた弁座部に当接可能な弁体手段であって、一次側から二次側に通過する流体の流れを受けて移動し、弁座部と離隔することによって、外周部分に形成される外周流路を開放して開弁状態になり、二次側から一次側に向かう逆流方向の流体の流れを受けて移動し、弁座部に当接することによって、外周部分に形成される外周流路を閉塞して閉弁状態になる弁体手段、
を備えた逆止弁において、
弁室部には、弁体手段と当接可能である補助弁座部が設けられており、
弁体手段には、外周流路とは異なる経路である補助流路を形成させる補助流路空間が形成されており、
弁体手段が開弁状態にあるとき、弁体手段は補助弁座部と離隔することによって補助流路空間を開放して補助流路を形成し、
弁体手段が閉弁状態にあるとき、弁体手段は補助弁座部に当接することによって補助流路を閉塞する、
ことを特徴とする逆止弁。 A flow path through which the fluid passes from the primary side to the secondary side, and a main body having a valve chamber portion communicating with the flow path.
It is a valve body means that is movably located in the valve chamber and can come into contact with the valve seat provided in the valve chamber, and moves by receiving the flow of fluid passing from the primary side to the secondary side. However, by separating from the valve seat portion, the outer peripheral flow path formed in the outer peripheral portion is opened to open the valve, and the fluid moves in the backflow direction from the secondary side to the primary side. A valve body means that closes the outer peripheral flow path formed in the outer peripheral portion by abutting on the valve seat portion and closes the valve.
In a check valve equipped with
The valve chamber is provided with an auxiliary valve seat that can come into contact with the valve body means.
The valve body means is formed with an auxiliary flow path space that forms an auxiliary flow path that is a path different from the outer peripheral flow path.
When the valve body means is in the valve open state, the valve body means separates from the auxiliary valve seat portion to open the auxiliary flow path space and form the auxiliary flow path.
When the valve body means is in the closed state, the valve body means closes the auxiliary flow path by abutting on the auxiliary valve seat portion.
A check valve characterized by that. 請求項１に係る逆止弁において、
弁体手段に形成されている補助流路空間は、当該弁体手段の中心部に貫通孔として形成されている、
ことを特徴とする逆止弁。 In the check valve according to claim 1,
The auxiliary flow path space formed in the valve body means is formed as a through hole in the center of the valve body means.
A check valve characterized by that. 請求項２に係る逆止弁において、
補助弁座部は、補助流路空間を貫通して位置する固定部材によって支持されている、
ことを特徴とする逆止弁。

In the check valve according to claim 2,
The auxiliary valve seat portion is supported by a fixing member located through the auxiliary flow path space.
A check valve characterized by that.
JP2020152477A 2020-09-11 2020-09-11 non-return valve Active JP7506918B2 (en)

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