JP2014009800A - Check valve and water heater including the same - Google Patents
Check valve and water heater including the same Download PDFInfo
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- JP2014009800A JP2014009800A JP2012149071A JP2012149071A JP2014009800A JP 2014009800 A JP2014009800 A JP 2014009800A JP 2012149071 A JP2012149071 A JP 2012149071A JP 2012149071 A JP2012149071 A JP 2012149071A JP 2014009800 A JP2014009800 A JP 2014009800A
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Abstract
Description
本発明は、給湯機等に使用される逆止弁に関するものである。 The present invention relates to a check valve used in a water heater or the like.
従来、この種の逆止弁は、以下のようなものが一般的であった。 Conventionally, this type of check valve is generally as follows.
この逆止弁は、図５に示されているように、弁ケース１９の内部に一次側から二次側への流体の移動を許容するための逆止弁体２０を収容するとともに、前記弁ケース１９と前記逆止弁体２０との間に、前記逆止弁体２０を常に閉位置に付勢するためのバネ２１を介在させ、前記逆止弁体２０に二次側から一次側に圧力を逃すための圧力逃し通路２２を設け、前記圧力逃し通路２２の一次側の開口を、弾性材料よりなる圧力逃し弁板２３により常に閉塞し、二次側の圧力が異常に高くなった場合に、前記圧力逃し弁板２３を弾性変形させて前記圧力逃し通路２２を開放するようにしたことを特徴とする圧力緩和構造を備えていることを特徴としている（例えば、特許文献１参照）。 As shown in FIG. 5, the check valve accommodates a check valve body 20 for allowing the fluid to move from the primary side to the secondary side in the valve case 19, and the valve A spring 21 is provided between the case 19 and the check valve body 20 to constantly urge the check valve body 20 to the closed position, and the check valve body 20 is moved from the secondary side to the primary side. When the pressure relief passage 22 for releasing pressure is provided, and the primary side opening of the pressure relief passage 22 is always closed by the pressure relief valve plate 23 made of an elastic material, and the pressure on the secondary side becomes abnormally high Further, the pressure relief valve plate 23 is elastically deformed to open the pressure relief passage 22, and a pressure relief structure is provided (see, for example, Patent Document 1).
しかしながら、従来の逆止弁では弾性材料よりなる前記圧力逃し弁板２３の弾性変形によって圧力を逃すため、弾性体の温度特性および硬度のバラツキなどによって圧力逃しの設定圧が大きく変動する。 However, in the conventional check valve, since the pressure is released by elastic deformation of the pressure relief valve plate 23 made of an elastic material, the set pressure for pressure relief greatly fluctuates due to variations in temperature characteristics and hardness of the elastic body.
また、圧力逃しの設定圧を変更する際には、前記圧力逃し弁板２３を作り変える必要があり、圧力逃しの設定圧の再設定が困難であった。 Further, when changing the pressure relief set pressure, the pressure relief valve plate 23 needs to be redesigned, and it is difficult to reset the pressure relief set pressure.
本発明は、前記従来の課題を解決するもので、圧力逃しの設定圧を正確に設定できるようにした逆止弁を提供することを目的とする。 The present invention solves the above-described conventional problems, and an object of the present invention is to provide a check valve that can accurately set a set pressure for pressure relief.
前記従来の課題を解決するために、本発明の逆止弁は、先端が流路一次側に対向する摺動軸と、前記摺動軸の外周で前記摺動軸の先端より流路二次側に配設されたパッキンと、前記パッキンと前記摺動軸との軸方向間に配設された第一バネと、前記摺動軸の軸方向に固定され、前記第一バネよりも前記流路二次側に配設された第二バネとを備え、前記流路二次側より圧力が作用し、前記摺動軸の先端が前記パッキンより離間したときに、前記パッキンと前記摺動軸の外周との間に流路が形成される構成としたことを特徴とするものである。 In order to solve the above-described conventional problems, the check valve of the present invention includes a sliding shaft whose tip is opposed to the primary side of the flow path, and a secondary flow path from the tip of the sliding shaft on the outer periphery of the sliding shaft. A packing disposed on the side, a first spring disposed between the packing and the sliding shaft in an axial direction, and fixed in the axial direction of the sliding shaft. A second spring disposed on the secondary side of the path, and when the pressure acts from the secondary side of the flow path and the tip of the sliding shaft is separated from the packing, the packing and the sliding shaft This is characterized in that a flow path is formed between the outer periphery and the outer periphery.
これにより、圧力逃しの設定圧は、摺動軸にかかる流路一次側と二次側との圧力差および第一バネによってパッキンを押し付ける力の関係によって決定し、パッキンの温度特性や高度の影響は少なくなるため、正確な圧力逃しの設定ができる。 As a result, the set pressure for pressure relief is determined by the relationship between the pressure difference between the primary and secondary sides of the flow path on the sliding shaft and the force pressing the packing with the first spring. Therefore, accurate pressure relief can be set.
本発明によれば、圧力逃しの設定圧を正確に設定できるようにした逆止弁を提供圧できる。 According to the present invention, it is possible to provide a check valve that can accurately set the set pressure for pressure relief.
第１の発明は、先端が流路一次側に対向する摺動軸と、前記摺動軸の外周で前記摺動軸の先端より流路二次側に配設されたパッキンと、前記パッキンと前記摺動軸との軸方向間に配設された第一バネと、前記摺動軸の軸方向に固定され、前記第一バネよりも前記流路二次側に配設された第二バネとを備え、前記流路二次側より圧力が作用し、前記摺動軸の先端が前記パッキンより離間したときに、前記パッキンと前記摺動軸の外周との間に流路が形成される構成としたことを特徴とする逆止弁である。 A first invention includes a sliding shaft having a tip opposed to a flow path primary side, a packing disposed on an outer periphery of the sliding shaft on a flow path secondary side from a tip of the sliding shaft, and the packing A first spring disposed between the sliding shaft and an axial direction of the sliding shaft, and a second spring fixed in the axial direction of the sliding shaft and disposed closer to the flow path secondary side than the first spring. When the pressure acts from the secondary side of the flow path and the tip of the sliding shaft is separated from the packing, a flow path is formed between the packing and the outer periphery of the sliding shaft. A check valve characterized by having a configuration.
これにより、圧力逃しの設定圧は、摺動軸にかかる流路一次側と二次側との圧力差および第一バネによってパッキンを押し付ける力の関係によって決定し、パッキンの温度特性や高度の影響は少なくなるため、正確な圧力逃しの設定ができる。 As a result, the set pressure for pressure relief is determined by the relationship between the pressure difference between the primary and secondary sides of the flow path on the sliding shaft and the force pressing the packing with the first spring. Therefore, accurate pressure relief can be set.
第２の発明は、前記摺動軸の先端に閉塞体を配設し、前記パッキンと前記摺動軸の外周との間に形成された流路を、前記閉塞体と前記パッキンとにより閉塞させる構成としたことを特徴とするものである。 According to a second aspect of the present invention, a closing body is disposed at a tip of the sliding shaft, and a flow path formed between the packing and the outer periphery of the sliding shaft is closed by the closing body and the packing. It is characterized by having a configuration.
これにより、パッキンに負荷をかけることなく摺動軸へ組み付けることで、パッキンに亀裂等の不良発生を防ぐことを可能にしたものである。 Thus, it is possible to prevent defects such as cracks in the packing by assembling to the sliding shaft without applying a load to the packing.
また、摺動軸に閉塞体を組み付けることで、摺動軸とパッキンによるシール面積に比べ、閉塞体とパッキンによるシール面積を大きく確保でき、安定したシール構成を実現できる。 Further, by assembling the closing body on the sliding shaft, it is possible to secure a large sealing area by the closing body and packing compared to the sealing area by the sliding shaft and packing, thereby realizing a stable seal configuration.
第３の発明は、第１または第２に記載の逆止弁を備えたことを特徴とする給湯機で、給湯機において局所的に圧力が上昇することを防止でき、使用性の高い給湯機を提供できる。 A third aspect of the present invention is a water heater provided with the check valve according to the first or second aspect, which can prevent a local increase in pressure in the water heater, and has high usability. Can provide.
以下、本発明の実施の形態について、図面を参照して説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
（実施の形態１）
図１は、本発明の実施の形態１における逆止弁の断面図である。
(Embodiment 1)
FIG. 1 is a cross-sectional view of a check valve according to Embodiment 1 of the present invention.
流路１の二次側から一次側へ向かって前記流路１を閉じる方向に、第一バネ４を介して摺動軸２へ押し付けられたパッキン３を、第二バネ５によって前記流路１に形成された弁座１９に押圧させ、一次側の圧力が上昇したときに、前記第一バネ４が収縮することで、前記摺動軸２が前記流路１の一次側に摺動し、前記摺動軸２の外周部と前記パッキン３との間で形成された圧力緩和流路８を連通させ、一次側へ圧力を逃す圧力緩和構造を備えた構成となっている。 The packing 3 pressed against the sliding shaft 2 via the first spring 4 in the direction of closing the flow path 1 from the secondary side to the primary side of the flow path 1 is moved by the second spring 5 to the flow path 1. When the pressure on the primary side rises, the first spring 4 contracts when the primary side pressure rises, so that the sliding shaft 2 slides to the primary side of the flow path 1, The pressure relaxation flow path 8 formed between the outer peripheral part of the sliding shaft 2 and the packing 3 is communicated, and a pressure relaxation structure is provided to release pressure to the primary side.
以上のように構成された圧力緩和構造を備えた逆止弁について、以下その動作、作用を説明する。 The operation and action of the check valve having the pressure relaxation structure configured as described above will be described below.
図１は、前記流路１の一次側から二次側に向かって対流した際の作動状態を示す。 FIG. 1 shows an operating state when convection is performed from the primary side to the secondary side of the flow path 1.
前記流路１の一次側圧力が、二次側圧力に前記第二バネ５の力を加えた力を超えた際に、前記第二バネ５の力によって、前記流路１に形成された弁座１９に押圧されていた前記パッキン３が弁座１９から離れ、一次側から二次側に向かう対流を実現させる。 A valve formed in the flow path 1 by the force of the second spring 5 when the primary pressure of the flow path 1 exceeds the force obtained by applying the force of the second spring 5 to the secondary pressure. The packing 3 pressed against the seat 19 is separated from the valve seat 19 to realize convection from the primary side to the secondary side.
図２は、前記流路１の二次側から一次側に向かって逆止弁機構が作動した状態を示す。 FIG. 2 shows a state in which the check valve mechanism is operated from the secondary side to the primary side of the flow path 1.
前記流路１の二次側の圧力が一次側の圧力よりも高く、かつ、前記摺動軸２にかかる二次側圧力が、前記摺動軸２にかかる一次側圧力に前記第一バネ４の力を加えた力よりも低い場合に、前記流路１を閉塞する。 The pressure on the secondary side of the flow path 1 is higher than the pressure on the primary side, and the secondary pressure applied to the sliding shaft 2 is changed to the primary pressure applied to the sliding shaft 2 to the first spring 4. When the force is lower than the applied force, the flow path 1 is closed.
図３は、前記流路１の二次側から一次側に向かって圧力緩和構造が作動した状態を示す。 FIG. 3 shows a state in which the pressure relaxation structure is operated from the secondary side to the primary side of the flow path 1.
前記流路１の二次側の圧力が一次側の圧力よりも高く、かつ、前記摺動軸２にかかる二次側の圧力が前記摺動軸２にかかる一次側圧力に前記第一バネ４の力を加えた力よりも高い場合に、前記第一バネ４が圧縮され、前記摺動軸２が前記流路１の一次側へ移動することで、前記パッキン３と前記摺動軸２との間のシール構成が解かれ、前記パッキン３と前記摺動軸２との間で形成された圧力緩和流路８を通して前記流路１の二次側から一次側へ圧力を逃す。 The pressure on the secondary side of the flow path 1 is higher than the pressure on the primary side, and the pressure on the secondary side applied to the sliding shaft 2 is changed to the primary pressure applied to the sliding shaft 2. The first spring 4 is compressed and the sliding shaft 2 moves to the primary side of the flow path 1 so that the packing 3 and the sliding shaft 2 The pressure is released from the secondary side to the primary side of the flow path 1 through the pressure relaxation flow path 8 formed between the packing 3 and the sliding shaft 2.
以上のように、図１から図３の構成により、前記流路１の二次側圧力が異常に高くなった場合、流体温度や前記パッキン３の硬度に依ることなく、前記摺動軸２の流路一次側と二次側との圧力差と前記第一バネ４のバネ力のみによって圧力緩和機能が働くため、安定した圧力緩和性能を確保することが可能となる。 As described above, when the secondary pressure of the flow path 1 becomes abnormally high due to the configuration of FIGS. 1 to 3, the sliding shaft 2 does not depend on the fluid temperature or the hardness of the packing 3. Since the pressure relaxation function works only by the pressure difference between the flow path primary side and the secondary side and the spring force of the first spring 4, stable pressure relaxation performance can be ensured.
また、前記摺動軸２の流路一次側に閉塞体７を固定接続することで前記パッキン３とのシール面積を大きくすることが可能となり、前記圧力緩和流路８と前記パッキン３との間の閉塞精度を向上させることが可能となる。 Further, it is possible to increase the sealing area with the packing 3 by fixedly connecting the closing body 7 to the flow path primary side of the sliding shaft 2, and between the pressure relaxation flow path 8 and the packing 3. It becomes possible to improve the occlusion accuracy.
なお、前記摺動軸２に閉塞体７の機能を保有させた形状であっても、前記圧力緩和流路８を閉塞することは可能であるが、前記パッキン３の軸穴径よりも前記摺動軸２の閉塞機能部の外径を大きくする必要があるため、組み立て時に、前記パッキン３が損傷することを防ぐには、前記摺動軸２の閉塞機能部と前記パッキン３との間で確保できるシール面積は限定される。 Even if the sliding shaft 2 has the function of the closing body 7, it is possible to close the pressure relaxation flow path 8, but the sliding shaft is smaller than the shaft hole diameter of the packing 3. Since it is necessary to increase the outer diameter of the closing function part of the moving shaft 2, in order to prevent the packing 3 from being damaged during assembly, the closing function part of the sliding shaft 2 and the packing 3 are prevented from being damaged. The seal area that can be secured is limited.
また、前記パッキン３と前記第一バネ４との間にパッキン保持板６を設けることで、前記流路１を閉塞する際に前記パッキン３の変形を抑制することができ、閉塞精度を向上させることが可能となる。 Further, by providing a packing holding plate 6 between the packing 3 and the first spring 4, deformation of the packing 3 can be suppressed when the flow path 1 is closed, and the closing accuracy is improved. It becomes possible.
また、前記パッキン３をゴム材で構成することで、流路二次側から一次側への閉塞精度を向上させることが可能となる。 Moreover, it becomes possible to improve the obstruction | occlusion precision from a flow path secondary side to a primary side by comprising the said packing 3 with a rubber material.
図４は、本発明の実施の形態１における貯湯式給湯機のシステム図を示す。 FIG. 4 shows a system diagram of the hot water storage type hot water supply apparatus according to Embodiment 1 of the present invention.
図において、本実施の形態１の貯湯式給湯機は、貯湯タンクユニット９と熱源ユニット
１０とで構成されており、貯湯タンクユニット９は、湯水を貯湯する貯湯タンク１１と湯水を混合して所定の湯温に調整する混合弁１２と、前記混合弁１２に湯水を供給する給湯湯側管路１３と、前記混合弁１２に水を供給する給湯水側管路１４とを有している。
In the figure, the hot water storage type water heater of the first embodiment is constituted by a hot water storage tank unit 9 and a heat source unit 10, and the hot water storage tank unit 9 mixes a hot water storage tank 11 for storing hot water and hot water with a predetermined amount. A mixing valve 12 that adjusts to the hot water temperature, a hot water supply side pipe line 13 that supplies hot water to the mixing valve 12, and a hot water supply side pipe line 14 that supplies water to the mixing valve 12.
前記混合弁１２で調整した湯水は、給湯管路１５を介してカラン１６へと接続されており、使用者が前記カラン１６を開閉することで所定の湯水を供給する。 The hot water adjusted by the mixing valve 12 is connected to the currant 16 via the hot water supply pipe 15, and the user supplies the predetermined hot water by opening and closing the currant 16.
また、前記カラン１６側から前記混合弁１２に向かって逆流することを防止する目的で、前記混合弁１２の湯水両側に逆止弁１７、１８を設けることが一般的である。 In addition, for the purpose of preventing a reverse flow from the currant 16 side toward the mixing valve 12, check valves 17 and 18 are generally provided on both sides of the mixing valve 12.
このように構成された給湯機において、低外気温となる冬場に前記給湯管路１５が凍結し、前記給湯管路１５内の圧力が異常に高くなった場合などに、本発明の圧力緩和構造を備えた逆止弁を設けることで、前記逆止弁１７、１８にかかる負荷を低減し、損傷を防止することが可能となる。 In the water heater configured as described above, the pressure relief structure of the present invention is used when the hot water supply line 15 is frozen in the winter when the outside air temperature is low and the pressure in the hot water supply line 15 becomes abnormally high. By providing a check valve provided with the above, it is possible to reduce the load applied to the check valves 17 and 18 and prevent damage.
以上のように、本発明にかかる逆止弁は、二次側が異常圧力となり、一次側に圧力を逃す際の圧力逃しの設定圧が正確に設定することが可能となるので、圧力逃しの必要な機器、特に給湯機等に有用である。 As described above, the check valve according to the present invention has an abnormal pressure on the secondary side, and it is possible to accurately set the pressure relief setting pressure when the pressure is released to the primary side. This is useful for various devices, particularly hot water heaters.
１ 流路
２ 摺動軸
３ パッキン
４ 第一バネ
５ 第二バネ
６ パッキン保持板
７ 閉塞体
８ 圧力緩和流路
DESCRIPTION OF SYMBOLS 1 Flow path 2 Sliding shaft 3 Packing 4 1st spring 5 2nd spring 6 Packing holding plate 7 Closure body 8 Pressure relief flow path
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012149071A JP6002933B2 (en) | 2012-07-03 | 2012-07-03 | Check valve and water heater provided with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012149071A JP6002933B2 (en) | 2012-07-03 | 2012-07-03 | Check valve and water heater provided with the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2014009800A true JP2014009800A (en) | 2014-01-20 |
| JP6002933B2 JP6002933B2 (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012149071A Active JP6002933B2 (en) | 2012-07-03 | 2012-07-03 | Check valve and water heater provided with the same |
Country Status (1)
| Country | Link |
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| JP (1) | JP6002933B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014190523A (en) * | 2013-03-28 | 2014-10-06 | Time Engineering Co Ltd | Check valve |
| JP2016200174A (en) * | 2015-04-08 | 2016-12-01 | アック東北株式会社 | Multifunctional valve having partitioning valve and quick closing-type check valve, and water hammer prevention function having slow closing-type auxiliary valve and negative pressure operation air intake valve |
| CN110094285A (en) * | 2018-01-29 | 2019-08-06 | 世倍特集团有限责任公司 | The high pressure port and high pressure fuel pump of high pressure fuel pump for fuel injection system |
| CN110529638A (en) * | 2019-08-20 | 2019-12-03 | 王美娟 | A kind of two-stage pressure release direct-acting overflow valve |
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| JPH02124379U (en) * | 1989-03-24 | 1990-10-12 | ||
| JPH0386203U (en) * | 1989-12-22 | 1991-08-30 | ||
| JP2010096298A (en) * | 2008-10-17 | 2010-04-30 | Mitsubishi Electric Corp | Check valve and storage type hot water supplying unit using check valve |
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2012
- 2012-07-03 JP JP2012149071A patent/JP6002933B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02124379U (en) * | 1989-03-24 | 1990-10-12 | ||
| JPH0386203U (en) * | 1989-12-22 | 1991-08-30 | ||
| JP2010096298A (en) * | 2008-10-17 | 2010-04-30 | Mitsubishi Electric Corp | Check valve and storage type hot water supplying unit using check valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014190523A (en) * | 2013-03-28 | 2014-10-06 | Time Engineering Co Ltd | Check valve |
| JP2016200174A (en) * | 2015-04-08 | 2016-12-01 | アック東北株式会社 | Multifunctional valve having partitioning valve and quick closing-type check valve, and water hammer prevention function having slow closing-type auxiliary valve and negative pressure operation air intake valve |
| CN110094285A (en) * | 2018-01-29 | 2019-08-06 | 世倍特集团有限责任公司 | The high pressure port and high pressure fuel pump of high pressure fuel pump for fuel injection system |
| CN110529638A (en) * | 2019-08-20 | 2019-12-03 | 王美娟 | A kind of two-stage pressure release direct-acting overflow valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6002933B2 (en) | 2016-10-05 |
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