JP2016125643A - Check valve - Google Patents

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JP2016125643A
JP2016125643A JP2015002304A JP2015002304A JP2016125643A JP 2016125643 A JP2016125643 A JP 2016125643A JP 2015002304 A JP2015002304 A JP 2015002304A JP 2015002304 A JP2015002304 A JP 2015002304A JP 2016125643 A JP2016125643 A JP 2016125643A
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adapter
valve
valve body
check valve
flow
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JP6347749B2 (en
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嶋田　佳幸
Yoshiyuki Shimada
佳幸 嶋田
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Eagle Industry Co Ltd
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Eagle Industry Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a check valve formable regardless of a flow direction without increasing the number of components.SOLUTION: A check valve 1 permits a flow of fluid in one direction and regulates a flow of the fluid in the other direction by a valve element 4 that is biased to a valve seat by an elastic member 5. A first adapter 2 has a first flow hole 2b for flowing of the fluid and has a first space part 2k larger in diameter than the first flow hole 2b. A second adapter 3 has a second flow hole 3b for flowing of the fluid and has a second space part larger in diameter than the second flow hole 3b. The first adapter and the second adapter are coupled to each other, and in a storage part 8 formed by the first space part and the second space part, the valve element 4 and the elastic member 5 are received. The check valve has a first valve seat that abuts against the valve element 4 when the valve element 4 is installed in one direction between the first space part and the first flow hole 2b, and has a second valve seat that abuts against the valve element 4 when the valve element 4 is installed in the other direction between the second space part and the second flow hole 3b.SELECTED DRAWING: Figure 1

Description

本発明は、例えば自動車、建設機械、荷役運搬車両、産業用機械等に適用される流体方向制御用逆止弁であって、弾性部材によって弁座に付勢される弁体により、一方向の流体の流れを許容し、他方向の流体の流れを規制する逆止弁に関する。   The present invention is a fluid direction control check valve applied to, for example, an automobile, a construction machine, a cargo handling vehicle, an industrial machine, and the like, and is unidirectional by a valve body biased to a valve seat by an elastic member. The present invention relates to a check valve that allows fluid flow and restricts fluid flow in the other direction.

従来のポペットタイプの逆止弁として、例えば図４に示されるように、弁体、弾性部材、支持部材及び係止部材と、アダプタとからなる逆止弁３１が知られている（例えば、特許文献１及び２参照）。   As a conventional poppet type check valve, for example, as shown in FIG. 4, a check valve 31 including a valve body, an elastic member, a support member, a locking member, and an adapter is known (for example, a patent). Reference 1 and 2).

実用新案登録第３１０６２６３号公報（第３、４頁、図１−３）Utility Model Registration No. 3106263 (pages 3, 4 and 1-3) 特開平７−２９３７１９号公報（第３頁、図１）JP-A-7-293719 (page 3, FIG. 1)

逆止弁３１のアダプタ３２は、作動油等の流体の流れる流通孔３２ｂ、流通孔３２ｂより大径に形成された空間部３２ｋ、筐体３０に取付けるための雄ネジ部３２ａ、筐体３０とアダプタ３２との間を密封する密封部材３９と、外部配管をアダプタ３２に取付けるための雌ネジ部３２ｈを有する。空間部３２ｋに収納された弁体３４が流通孔３２ｂの内側端部３２ｃに当接するように配設され、該弁体３４は、弾性部材３５によって流通孔３２ｂに向けて付勢され、該弾性部材３５は係止部材３７によって位置を固定された支持部材３６によって支持されている。このように、弁体３４が内側端部３２ｃに当接した状態で流通孔３２ｂは閉止され、出口側から入口側への流体の流れは規制される。逆に、入口側の圧力が上昇し、弁体３４に作用する入口側から出口側への流体圧による力が、弾性体３５による弁体３４への付勢力と弁体３４に作用する出口側から入口側への流体圧による力との和よりも大きくなると、弁体３４が内側端部３２ｃから離間し、流体の入口側から出口側への流れが許容される。   The adapter 32 of the check valve 31 includes a flow hole 32b through which a fluid such as hydraulic oil flows, a space part 32k having a larger diameter than the flow hole 32b, a male screw part 32a to be attached to the case 30, and the case 30 A sealing member 39 that seals between the adapter 32 and a female screw portion 32 h for attaching external piping to the adapter 32 is provided. The valve body 34 accommodated in the space portion 32k is disposed so as to contact the inner end 32c of the flow hole 32b. The valve body 34 is urged toward the flow hole 32b by the elastic member 35, and the elastic body 35 The member 35 is supported by a support member 36 whose position is fixed by a locking member 37. In this way, the flow hole 32b is closed with the valve body 34 in contact with the inner end portion 32c, and the flow of fluid from the outlet side to the inlet side is restricted. Conversely, the pressure on the inlet side rises, and the force due to the fluid pressure from the inlet side to the outlet side acting on the valve body 34 causes the biasing force of the elastic body 35 to the valve body 34 and the outlet side acting on the valve body 34. When it becomes larger than the sum of the force due to the fluid pressure from the inlet side to the inlet side, the valve body 34 is separated from the inner end portion 32c, and the flow of the fluid from the inlet side to the outlet side is allowed.

図４の逆止弁３１と逆方向の流れを許容する逆止弁４１においては、図５に示されるように、弁体３４、弾性部材３５、支持部材３６及び係止部材３７を、図４の逆止弁３１を構成する部品と共用にして、コストダウン、部品の管理の簡素化及び弁体３４前後での圧力損失や弁体３４のクラッキング圧の同一化を図っている。そして、図５に示されるように、逆方向の流れを許容する逆止弁に適合するように、アダプタ３２（図４参照）の形状とは異なる形状のアダプタ４２と、弁体３４、弾性部材３５、支持部材３６及び係止部材３７を使用して、逆方向流れを許容する逆止弁４１を構成していた。   In the check valve 41 that allows the flow in the direction opposite to that of the check valve 31 in FIG. 4, as shown in FIG. 5, the valve body 34, the elastic member 35, the support member 36, and the locking member 37 are replaced by This is shared with the components constituting the check valve 31 to reduce the cost, simplify the management of the components, and equalize the pressure loss before and after the valve body 34 and the cracking pressure of the valve body 34. As shown in FIG. 5, an adapter 42 having a shape different from the shape of the adapter 32 (see FIG. 4), a valve body 34, and an elastic member so as to be adapted to a check valve that allows reverse flow. 35, the check member 41 that allows reverse flow is configured using the support member 36 and the locking member 37.

しかしながら、図４、図５に示される逆止弁３１、４１にあっては、流れの方向によって形状の異なる形状のアダプタ３２、４２を使用する必要がある。また、図４のアダプタ３２においては雄ネジ部３２ａ、雌ネジ部３２ｈのネジサイズは同一に形成されるが、図５の逆止弁４１は、弁体３４、弾性部材３５、支持部材３６及び係止部材３７はアダプタ４２の雄ネジ部４２ａの内部に収納されるため、アダプタ４２の雄ネジ部４２ａのネジサイズは雌ネジ部３０ａ、４２ｈのネジサイズより大きく形成する必要があった。このため、逆止弁３１、４１を同じサイズの雄ネジ部３０ａに取付けるためには、図６に示されるように、さらに別部材のアダプタ４８をさらに用意して筐体３０の雌ネジ部３０ａに取付けなければならず、部品点数の増加、逆止弁４１が大形化する等の問題があった。   However, in the check valves 31 and 41 shown in FIGS. 4 and 5, it is necessary to use adapters 32 and 42 having different shapes depending on the flow direction. Further, in the adapter 32 of FIG. 4, the male screw portion 32a and the female screw portion 32h are formed to have the same screw size, but the check valve 41 of FIG. 5 includes a valve body 34, an elastic member 35, a support member 36, and Since the locking member 37 is housed inside the male screw portion 42a of the adapter 42, the screw size of the male screw portion 42a of the adapter 42 needs to be formed larger than the screw sizes of the female screw portions 30a and 42h. For this reason, in order to attach the check valves 31 and 41 to the male screw portion 30a of the same size, as shown in FIG. 6, a separate adapter 48 is further prepared and the female screw portion 30a of the housing 30 is prepared. There are problems such as an increase in the number of parts and an increase in the size of the check valve 41.

本発明は、このような問題点に着目してなされたもので、流れの方向に関わらず、部品点数を増やすことなく構成できる逆止弁を提供することを目的とする。   The present invention has been made paying attention to such problems, and an object thereof is to provide a check valve that can be configured without increasing the number of parts regardless of the direction of flow.

前記課題を解決するために、本発明の逆止弁は、
弾性部材によって弁座に付勢される弁体により、一方向の流体の流れを許容し、他方向の流体の流れを規制する逆止弁であって、流体が流れる第１流通孔を有し、該第１流通孔より大径の第１空間部を有する第１アダプタと、流体が流れる第２流通孔を有し、該第２流通孔より大径の第２空間部を有する第２アダプタとが結合して、前記第１空間部及び前記第２空間部により形成される収容部に、前記弁体と前記弾性部材を収容し、
前記第１空間部と前記第１流通孔との間に前記弁体が一方の向きに設置された際に前記弁体と当接する第１弁座を有し、前記第２空間部と前記第２流通孔との間に前記弁体が他方の向きに設置された際に前記弁体と当接する第２弁座を有することを特徴としている。
この特徴によれば、結合された第１アダプタと第２アダプタとから形成される収容部内の弁体及び弾性部材の向きを入れ替えることにより、同一の構成部品を用いて第１アダプタと第２アダプタに対する流通方向を設定することができる。 In order to solve the above problems, the check valve of the present invention is:
A check valve that allows the flow of fluid in one direction and restricts the flow of fluid in the other direction by a valve body that is biased to the valve seat by an elastic member, and has a first flow hole through which the fluid flows. A second adapter having a first space portion having a larger diameter than the first flow hole and a second flow hole through which a fluid flows and having a second space portion having a diameter larger than the second flow hole. And the valve body and the elastic member are accommodated in the accommodating portion formed by the first space portion and the second space portion,
A first valve seat that contacts the valve body when the valve body is installed in one direction between the first space portion and the first flow hole; It has the 2nd valve seat which contacts the said valve body when the said valve body is installed in the other direction between 2 flow holes.
According to this feature, the first adapter and the second adapter can be used by using the same components by changing the direction of the valve body and the elastic member in the accommodating portion formed by the combined first adapter and second adapter. The distribution direction with respect to can be set.

本発明の逆止弁は、
前記第１弁座及び前記第２弁座は、ともに同径に形成されていることを特徴としている。
この特徴によれば、第１弁座と第２弁座は、弁体に対して同じ弁座として機能する。 The check valve of the present invention is
The first valve seat and the second valve seat are both formed to have the same diameter.
According to this feature, the first valve seat and the second valve seat function as the same valve seat with respect to the valve body.

本発明の逆止弁は、
前記第１空間部の内周面と前記第２空間部の内周面は、ともに同径に形成されていることを特徴としている。
この特徴によれば、第１空間部の内周面と第２空間部の内周面は、弁体の案内面として機能する。 The check valve of the present invention is
The inner peripheral surface of the first space portion and the inner peripheral surface of the second space portion are both formed to have the same diameter.
According to this feature, the inner peripheral surface of the first space portion and the inner peripheral surface of the second space portion function as a guide surface of the valve body.

本発明の逆止弁は、
前記第１空間部及び前記第２空間部には、ともに前記弾性部材を支持する支持部が備えられることを特徴としている。
この特徴によれば、第１アダプタ及び第２アダプタは別途支持部材を用意することなく弾性部材を支持することができる。 The check valve of the present invention is
Both the first space part and the second space part are provided with support parts for supporting the elastic member.
According to this feature, the first adapter and the second adapter can support the elastic member without preparing a separate support member.

本発明の逆止弁は、
前記収容部は拡径部を有し、前記弁体には前記拡径部内を移動可能な延設部が備えられることを特徴としている。
この特徴によれば、弁体の延設部は第１アダプタと第２アダプタとから形成される拡径部によって、その可動範囲を設定することができる。 The check valve of the present invention is
The accommodating portion has an enlarged diameter portion, and the valve body is provided with an extending portion that is movable in the enlarged diameter portion.
According to this feature, the extending range of the valve body can set the movable range by the enlarged diameter portion formed from the first adapter and the second adapter.

本発明に係る一方向の流体の流れを許容する逆止弁の断面図である。It is sectional drawing of the non-return valve which accept | permits the flow of the fluid of the one direction which concerns on this invention. 本発明に係る他方向の流体の流れを許容する逆止弁の断面図である。It is sectional drawing of the non-return valve which accept | permits the flow of the fluid of the other direction which concerns on this invention. 図１の逆止弁の分解説明図である。FIG. 3 is an exploded explanatory view of the check valve of FIG. 1. 従来の一方向の流体の流れを許容する逆止弁の断面図である。It is sectional drawing of the non-return valve which permits the flow of the fluid of the conventional one direction. 従来の他方向の流体の流れを許容する逆止弁の断面図である。It is sectional drawing of the non-return valve which accept | permits the flow of the fluid of the conventional other direction. アダプタを介して図５の逆止弁を筐体に取付けた状態を示す断面図である。It is sectional drawing which shows the state which attached the non-return valve of FIG. 5 to the housing | casing via the adapter.

本発明に係る逆止弁を図１から図３を参照して説明する。以下、図１及び図２は紙面を縦長状態で、図３は紙面を横長状態で、上下方向を径方向、左右方向を軸方向として説明する。   A check valve according to the present invention will be described with reference to FIGS. 1 and 2 will be described with the paper surface in a vertically long state, and FIG. 3 with the paper surface in a horizontally long state, with the vertical direction as the radial direction and the horizontal direction as the axial direction.

図１から図３に示されるように、本発明の逆止弁１は、第１アダプタ２、第２アダプタ３、弁体４、弾性部材としてのスプリング５を主に備え、さらに、逆止弁１の取付け対象となる筐体（図示せず）及びアダプタ２との間を密封する密封部材９と、第１アダプタ２及び第２アダプタ３の間を密封する密封部材１０を備える。   As shown in FIGS. 1 to 3, the check valve 1 of the present invention mainly includes a first adapter 2, a second adapter 3, a valve body 4, and a spring 5 as an elastic member, and further includes a check valve. 1 is provided with a sealing member 9 that seals between a housing (not shown) to be attached to 1 and the adapter 2, and a sealing member 10 that seals between the first adapter 2 and the second adapter 3.

以下、逆止弁１の構成要素について図３を参照して説明する。なお、図３の第１アダプタ２、第２アダプタ３、弁体４、スプリング５の配置は、図１の逆止弁１に対応している。図２の逆止弁１１は、逆止弁１と同じ構成要素からなり、図１の逆止弁１に対し、弁体４とスプリング５の軸方向の配置が異なるのみである。   Hereinafter, the components of the check valve 1 will be described with reference to FIG. In addition, arrangement | positioning of the 1st adapter 2, the 2nd adapter 3, the valve body 4, and the spring 5 of FIG. 3 respond | corresponds to the non-return valve 1 of FIG. The check valve 11 in FIG. 2 includes the same components as the check valve 1, and only the axial arrangement of the valve body 4 and the spring 5 is different from the check valve 1 in FIG. 1.

最初に、第１アダプタ２について説明する。第１アダプタ２は、流体が流れる第１流通孔２ｂと、該第１流通孔２ｂに連通する第１空間部２ｋを備える。第１空間部２ｋは、第１流通孔２ｂに連なり径方向外側に形成される第１内側端部２ｃ、該第１内側端部２ｃの外周端から軸方向に形成される第１内周面２ｄ、該第１内周面２ｄの軸方向端部から径方向外側に形成される第１内部端面２ｆ、該第１内部端面２ｆの外周端に連なり軸方向に形成される第１円筒面２ｇ、及び後述する第２アダプタ３を結合するための雌ネジ部２ｈを備える。なお、第１内側端部２ｃは、第１流通孔２ｂが第１空間部２ｋと接続する部分に形成される第１弁座２ｍ、該第１弁座２ｍから径方向外側へ形成される支持部としての第１支持面２ｎとからなる。また、雄ネジ部２ａは、筺体に設けられた雌ネジ部に螺合して、逆止弁１、１１を筐体に取付けるために使用される。   First, the first adapter 2 will be described. The first adapter 2 includes a first flow hole 2b through which a fluid flows and a first space 2k communicating with the first flow hole 2b. The first space portion 2k is connected to the first flow hole 2b and is formed on the radially outer side, and the first inner peripheral surface 2c is formed in the axial direction from the outer peripheral end of the first inner end portion 2c. 2d, a first inner end face 2f formed radially outward from the axial end of the first inner peripheral face 2d, and a first cylindrical face 2g formed in the axial direction, connected to the outer peripheral end of the first inner end face 2f. And a female screw portion 2h for coupling a second adapter 3 to be described later. The first inner end 2c has a first valve seat 2m formed at a portion where the first flow hole 2b is connected to the first space 2k, and a support formed radially outward from the first valve seat 2m. It consists of the 1st support surface 2n as a part. Further, the male screw portion 2a is used to attach the check valves 1 and 11 to the housing by screwing into a female screw portion provided in the housing.

つぎに、第２アダプタ３は、流体が流れる第２流通孔３ｂと、該第２流通孔３ｂに連通する第２空間部３ｋを有する。第２空間部３ｋは、第２流通孔３ｂに連なり径方向外側へ形成される第２内側端部３ｃ、該第２内側端部３ｃの外周端から軸方向に形成される第２内周面３ｄを備える。また、第２アダプタ３は、第２内周面３ｄの軸方向端部から径方向外側に形成される第２端面３ｅ、第２アダプタ３を第１アダプタ２に結合するための雄ネジ部３ｈを備える。なお、第２内側端部３ｃは、第２流通孔３ｂが第２空間部３ｋと接続する部分に形成される第２弁座３ｍ、該第２弁座３ｍから径方向外側へ形成される支持部としての第２支持面３ｎとからなる。また、雌ネジ部３ｇは、外部配管に設けられた雄ネジ部に螺合して、逆止弁１、１１を外部配管に取付けるために使用される。   Next, the second adapter 3 has a second flow hole 3b through which a fluid flows, and a second space 3k communicating with the second flow hole 3b. The second space 3k is connected to the second flow hole 3b and is formed in a radially outer side with a second inner end 3c, and a second inner peripheral surface formed in the axial direction from the outer peripheral end of the second inner end 3c. 3d. The second adapter 3 includes a second end surface 3e formed radially outward from the axial end of the second inner peripheral surface 3d, and a male screw portion 3h for coupling the second adapter 3 to the first adapter 2. Is provided. The second inner end 3c is a second valve seat 3m formed in a portion where the second flow hole 3b is connected to the second space 3k, and a support formed radially outward from the second valve seat 3m. It consists of the 2nd support surface 3n as a part. Further, the female screw portion 3g is used to attach the check valves 1 and 11 to the external pipe by screwing into a male screw portion provided in the external pipe.

続いて、弁体４は、第１流通孔２ｂ及び第２流通孔３ｂより小径に形成され、第１流通孔２ｂ及び第２流通孔３ｂに挿入される側端面４ａ、該側端面４ａに連なり漸次拡径する傾斜面４ｂ、該傾斜面４ｂに連なる外周面４ｃ、該外周面４ｃに複数形成され、流体が流れる弁流通孔４ｇ、外周面４ｃより大径に形成され、第１内周面２ｄ、第２内周面３ｄとのいずれにも摺接可能な摺接面４ｄ、該摺接面４ｄの端部側に径方向外側に延設された延設部としての鍔部４ｅ、及びスプリング５と当接する当接面４ｆを備える。   Subsequently, the valve body 4 is formed with a smaller diameter than the first flow hole 2b and the second flow hole 3b, and is connected to the side end face 4a and the side end face 4a inserted into the first flow hole 2b and the second flow hole 3b. An inclined surface 4b that gradually increases in diameter, an outer peripheral surface 4c that continues to the inclined surface 4b, a plurality of outer peripheral surfaces 4c that are formed on the outer peripheral surface 4c, and that has a larger diameter than the outer peripheral surface 4c. 2d, a slidable contact surface 4d that can be slidably contacted with the second inner peripheral surface 3d, an eaves portion 4e as an extended portion extending radially outward on the end side of the slidable contact surface 4d, and A contact surface 4f that contacts the spring 5 is provided.

スプリング５は、線状の材料をらせん状に巻いたコイルばねであり、弁体４を所定の力で第１流通孔２ｂ、第２流通孔３ｂに向けて付勢する。スプリング５が弁体４を付勢力する力は、スプリング５の縮み量に応じてほぼ比例して増減する。   The spring 5 is a coil spring in which a linear material is spirally wound, and urges the valve body 4 toward the first flow hole 2b and the second flow hole 3b with a predetermined force. The force with which the spring 5 biases the valve body 4 increases or decreases in proportion to the amount of contraction of the spring 5.

以上の第１アダプタ２、第２アダプタ３、弁体４、スプリング５を備える逆止弁１についての組立てについて説明する。図１に示される逆止弁１は、矢印Ａ方向の流れを許容し、矢印Ａ方向と逆方向の流れを規制するものである。この場合には、図１、図３に示されるように、第１アダプタ２の第１空間部２ｋに弁体４を挿入し、弁体４の傾斜面４ｂを弁座２ｍに当接させる。つぎに、弁体４の当接面４ｆにスプリング５の一端部を当接させ、第２アダプタ３の雄ネジ部３ｈを第１アダプタ２の雌ネジ部２ｈに螺合し、第２アダプタ２の第２支持面３ｎとスプリング５の他端部を当接させ、スプリング５によって弁体４を付勢する。   Assembly of the check valve 1 including the first adapter 2, the second adapter 3, the valve body 4, and the spring 5 will be described. The check valve 1 shown in FIG. 1 allows the flow in the direction of arrow A and restricts the flow in the direction opposite to the direction of arrow A. In this case, as shown in FIGS. 1 and 3, the valve body 4 is inserted into the first space 2k of the first adapter 2, and the inclined surface 4b of the valve body 4 is brought into contact with the valve seat 2m. Next, one end of the spring 5 is brought into contact with the contact surface 4 f of the valve body 4, the male screw portion 3 h of the second adapter 3 is screwed into the female screw portion 2 h of the first adapter 2, and the second adapter 2. The second support surface 3n and the other end of the spring 5 are brought into contact with each other, and the valve body 4 is urged by the spring 5.

一方、図２に示される逆止弁１１は、矢印Ｂ方向の流れを許容し、矢印Ｂ方向と逆方向の流れを規制するものである。この場合には、図２、図３に示されるように、第２アダプタ３の第２空間部３ｋに弁体４を挿入し、弁体４の傾斜面４ｂを第２弁座３ｍに当接させる。つぎに、弁体４の当接面４ｆにスプリング５の一端部を当接させ、第１アダプタ２の雄ネジ部３ｈを第１アダプタ２の雌ネジ部２ｈに螺合し、第１アダプタ２の第１支持面２ｎとスプリング５の他端部とを当接させ、スプリング５によって弁体４を付勢する。   On the other hand, the check valve 11 shown in FIG. 2 allows the flow in the direction of the arrow B and restricts the flow in the direction opposite to the direction of the arrow B. In this case, as shown in FIGS. 2 and 3, the valve body 4 is inserted into the second space 3k of the second adapter 3, and the inclined surface 4b of the valve body 4 is brought into contact with the second valve seat 3m. Let Next, one end portion of the spring 5 is brought into contact with the contact surface 4 f of the valve body 4, the male screw portion 3 h of the first adapter 2 is screwed into the female screw portion 2 h of the first adapter 2, and the first adapter 2. The first support surface 2n and the other end of the spring 5 are brought into contact with each other, and the valve body 4 is urged by the spring 5.

このように、第１アダプタ２の第１内側端部２ｃ及び第２アダプタ３の第２内側端部３ｃは、ともに弁体４の弁座２ｍ、３ｍとして機能するだけでなく、スプリング５の支持面２ｎ、３ｎとしても機能する。したがって、図１の逆止弁１及び図２の逆止弁１１は、第１アダプタ２、第２アダプタ３、弁体４、スプリング５の４つの部品のみを使用して、第１空間部２ｋ、第２空間部３ｋに弁体４、スプリング５を流体の流れの方向に応じて組立てるだけで、異なる流れ方向に適合する逆止弁を構成することができる。   Thus, both the first inner end 2c of the first adapter 2 and the second inner end 3c of the second adapter 3 not only function as the valve seats 2m and 3m of the valve body 4, but also support the spring 5. It also functions as the surfaces 2n and 3n. Therefore, the check valve 1 in FIG. 1 and the check valve 11 in FIG. 2 use only the four parts of the first adapter 2, the second adapter 3, the valve body 4, and the spring 5, and use the first space portion 2 k. By simply assembling the valve body 4 and the spring 5 in the second space 3k according to the direction of fluid flow, a check valve adapted to different flow directions can be configured.

加えて、以下説明するように、逆止弁１及び逆止弁１１は、流体の流れの方向に関わらず同じ性能を発揮するように、第１空間部２ｋの寸法と第２空間部３ｋの寸法は設定されている。   In addition, as will be described below, the check valve 1 and the check valve 11 have the same dimensions as the first space portion 2k and the second space portion 3k so that the same performance can be achieved regardless of the direction of fluid flow. The dimensions are set.

弁体４と当接する第１弁座２ｍ、第２弁座３ｍは、ともに同一径に形成されている。また、弁体４が収納され、弁体４が摺動する第１空間部２ｋ、第２空間部３ｋも、ともに同一寸法に形成されている。すなわち、図３に示されるように弁体４が収納される第１空間部２ｋの第１内周面２ｄの径方向寸法ｄ２、軸方向長さ寸法ｓ１、及び第２空間部３ｋの第２内周面３ｄの径方向寸法ｄ４、軸方向長さ寸法ｓ２は、ともに同一寸法に形成されている。したがって、弁体４の摺接面４ｄは、第１内周面２ｄ、第２内周面３ｄとの間にほぼ同じクリアランスを有するので、弁体４は第１空間部２ｋ、第２空間部３ｋのどちらに収納されていても同じように摺動する。また、弁体４と当接する第１弁座２ｍ、第２弁座３ｍはともに同一径に形成されるので、弁体４が弁座２ｍ、３ｍを離脱する力を流れの向きに関わらずほぼ同じ値にすることができる。   Both the first valve seat 2m and the second valve seat 3m that come into contact with the valve body 4 are formed to have the same diameter. Further, the first space portion 2k and the second space portion 3k in which the valve body 4 is housed and the valve body 4 slides are also formed to have the same dimensions. That is, as shown in FIG. 3, the radial dimension d2 of the first inner peripheral surface 2d of the first space 2k in which the valve body 4 is accommodated, the axial dimension s1, and the second dimension of the second space 3k. The radial dimension d4 and the axial length dimension s2 of the inner peripheral surface 3d are both formed to be the same dimension. Therefore, the sliding contact surface 4d of the valve body 4 has substantially the same clearance between the first inner peripheral surface 2d and the second inner peripheral surface 3d, so that the valve body 4 includes the first space portion 2k and the second space portion. It slides in the same way regardless of whether it is stored in 3k. Further, since both the first valve seat 2m and the second valve seat 3m that are in contact with the valve body 4 are formed with the same diameter, the force with which the valve body 4 separates the valve seats 2m and 3m is almost equal regardless of the flow direction. Can be the same value.

さらに、図１、図３に示されるように、第１アダプタ２と第２アダプタ３とを螺合して、第１アダプタの側端面２ｊと第２アダプタの中央端面３ｐを当接させた状態で第１空間部２ｋと第２空間部３ｋとが連通され、軸方向長さＬｔを有する収容部８が形成される。さらに該収容部８には、第１内部端面２ｆ、第１円筒面２ｇ、雌ネジ部２ｈ及び第２端面３ｅに囲まれる拡径部８ａが形成されており、該拡径部８ａには弁体４の延設部としての鍔部４ｅが配設される。該鍔部４ｅは拡径部８ａ内で移動でき、鍔部４ｅの当接面４ｆが第２アダプタ３の第２端面３ｅに当接するまで、最大ストロークＬ１だけ移動し得るようになっている。   Further, as shown in FIGS. 1 and 3, the first adapter 2 and the second adapter 3 are screwed together, and the side end surface 2j of the first adapter and the central end surface 3p of the second adapter are brought into contact with each other. Thus, the first space portion 2k and the second space portion 3k communicate with each other, and the accommodating portion 8 having the axial length Lt is formed. Further, the accommodating portion 8 is formed with an enlarged diameter portion 8a surrounded by the first inner end surface 2f, the first cylindrical surface 2g, the female screw portion 2h, and the second end surface 3e, and the enlarged diameter portion 8a includes a valve. A collar portion 4e as an extending portion of the body 4 is disposed. The flange portion 4e can move within the enlarged diameter portion 8a, and can move by the maximum stroke L1 until the contact surface 4f of the flange portion 4e contacts the second end surface 3e of the second adapter 3.

同じく、図２の逆止弁１１においても、弁体４の鍔部４ｅは、拡径部８ａ内でその当接面４ｆが第１アダプタ２の第１内部端面２ｆに当接するまで、最大ストロークＬ４だけ移動し得るようになっている。そして、図１及び図２から明らかなように、最大ストロークＬ１と最大ストロークＬ４は等しくなるように設定されている。   Similarly, in the check valve 11 of FIG. 2, the flange 4e of the valve body 4 has a maximum stroke until the contact surface 4f contacts the first inner end surface 2f of the first adapter 2 within the enlarged diameter portion 8a. It can move only by L4. As is clear from FIGS. 1 and 2, the maximum stroke L1 and the maximum stroke L4 are set to be equal.

このように、第１空間部２ｋ、第２空間部３ｋは、ともに同一の形状、寸法となっているので、流体の流れの方向に応じて第１空間部２ｋ、第２空間部３ｋに弁体４、スプリング５を収納し、第１アダプタと第２アダプタとを螺合して、第１アダプタの側端面２ｊと第２アダプタの中央端面３ｐを当接させるだけで、流れの方向に関わりなく、ともに同一の性能を発揮する逆止弁１（図１）と逆止弁１１（図２）を得ることができる。   Thus, since both the first space portion 2k and the second space portion 3k have the same shape and size, the first space portion 2k and the second space portion 3k are valved according to the direction of fluid flow. The body 4 and the spring 5 are accommodated, the first adapter and the second adapter are screwed together, and the side end surface 2j of the first adapter and the central end surface 3p of the second adapter are brought into contact with each other. In addition, the check valve 1 (FIG. 1) and the check valve 11 (FIG. 2) exhibiting the same performance can be obtained.

さらに、図１から図３に示されるように、弁体４と第１内周面２ｄとの摺動長さＬ２（図１参照）、弁体４と第２内周面３ｄとの摺動長さＬ５（図２参照）は、弁体４の最大ストロークＬ１、Ｌ４より大きく設定されているので、弁体４が最大ストロークＬ１、Ｌ４移動しても、弁体４と第１内周面２ｄ、弁体４と第２内周面３ｄとの摺動状態が維持され、弁体４は第１内周面２ｄ、第２内周面３ｄから離脱することがない。   Further, as shown in FIGS. 1 to 3, the sliding length L2 (see FIG. 1) between the valve body 4 and the first inner peripheral surface 2d, and the sliding between the valve body 4 and the second inner peripheral surface 3d. Since the length L5 (see FIG. 2) is set to be larger than the maximum strokes L1 and L4 of the valve body 4, even if the valve body 4 moves to the maximum strokes L1 and L4, the valve body 4 and the first inner peripheral surface 2d, the sliding state of the valve body 4 and the second inner peripheral surface 3d is maintained, and the valve body 4 is not detached from the first inner peripheral surface 2d and the second inner peripheral surface 3d.

つぎに、逆止弁１の動作について図１を参照して説明する。入口側の圧力が上昇し、弁体４に作用する入口側から出口側への流体圧による力が、弾性体５による弁体４を第１弁座２ｍへ押し付ける付勢力と弁体４に作用する出口側から入口側への流体圧による力との和よりも大きくなると、弁体４が第１弁座２ｍから離間し、流体が弁流通孔４ｇ、弁内部空間４ｈ、収容部８、第２流通孔３ｂを通って出口側に流れる。逆に、弁体４に作用する入口側から出口側への流体圧による力が、弾性体５による弁体４を第１弁座２ｍへ押し付ける付勢力と弁体４に作用する出口側から入口側への流体圧による力との和よりも小さくなると、弁体４が第１弁座２ｍに当接し、第１流通孔２ｂは閉止され、出口側から入口側への流体の流れは規制される。尚、図２の逆止弁１１については、図１と入口側と出口側が逆になっているだけであり、逆止弁１１の動作は図１の逆止弁１と同様のため、説明を省略する。   Next, the operation of the check valve 1 will be described with reference to FIG. The pressure on the inlet side rises, and the force due to the fluid pressure from the inlet side to the outlet side acting on the valve body 4 acts on the urging force and the urging force that presses the valve body 4 against the first valve seat 2m by the elastic body 5. When the sum of the force due to the fluid pressure from the outlet side to the inlet side increases, the valve body 4 is separated from the first valve seat 2m, and the fluid flows through the valve flow hole 4g, the valve inner space 4h, the accommodating portion 8, 2 Flows to the outlet side through the flow hole 3b. On the contrary, the force by the fluid pressure from the inlet side to the outlet side acting on the valve body 4 causes the biasing force of the elastic body 5 to press the valve body 4 against the first valve seat 2m and the outlet side acting on the valve body 4 from the outlet side. When the sum is smaller than the sum of the force due to the fluid pressure to the side, the valve body 4 comes into contact with the first valve seat 2m, the first flow hole 2b is closed, and the flow of fluid from the outlet side to the inlet side is restricted. The Note that the check valve 11 in FIG. 2 is merely the reverse of the inlet side and the outlet side in FIG. 1, and the operation of the check valve 11 is the same as that of the check valve 1 in FIG. Omitted.

以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。   Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

例えば、本実施例において、逆止弁１、逆止弁１１はともに、一方が雄ネジ、他方が雌ネジで、ともに同じサイズのネジに形成されている。しかしこれに限らず、ともに雄ネジ、またはともに雌ネジに構成することができ、しかもネジサイズを互いに異なるネジサイズとすることができる。したがって、図６に示されるような、従来用いられていた追加のアダプタ４８を使用する必要がない。   For example, in the present embodiment, both the check valve 1 and the check valve 11 are formed as screws of the same size, one being a male screw and the other being a female screw. However, the present invention is not limited to this, and both can be configured as male screws or female screws, and the screw sizes can be different from each other. Therefore, it is not necessary to use an additional adapter 48 used conventionally as shown in FIG.

また、本実施例において、スプリング５は、線状の材料をらせん状に巻いたコイルばねとしたが、これに限らず、さらばねを複数枚組み合わせたものを使用してもよい。また、スプリング５の付勢力と、スプリング５の縮み量を線形に変化するようにしたが、付勢力と縮み量との関係を非線形の関係になるようにしてもよい。   In this embodiment, the spring 5 is a coil spring in which a linear material is spirally wound. However, the present invention is not limited to this, and a combination of a plurality of springs may be used. Further, although the urging force of the spring 5 and the amount of contraction of the spring 5 are linearly changed, the relationship between the urging force and the amount of contraction may be a non-linear relationship.

さらに、本実施例の逆止弁１、逆止弁１１において、第１アダプタ２と第２アダプタ３とは螺合によって結合され、また、逆止弁１又は逆止弁１１と筐体との接合も螺接により結合されているが、これに限らず、例えばフランジ結合や溶接結合等、如何なる結合手段を使用してもよい。   Further, in the check valve 1 and the check valve 11 of the present embodiment, the first adapter 2 and the second adapter 3 are coupled by screwing, and the check valve 1 or the check valve 11 and the housing are connected to each other. The joining is also made by screwing, but is not limited to this, and any joining means such as flange joining or welding joining may be used.

また、第１アダプタ２、第２アダプタ３、弁体４、スプリング５の材料については特に記載しなかったが、要求される強度、耐環境性能、寿命等を満たせば、鉄鋼材料、鋳物、合成樹脂、繊維強化プラスチック等を単独で使用して構成してもよいし、これらの材料を組合わせて使用してもよい。   Further, the materials of the first adapter 2, the second adapter 3, the valve body 4, and the spring 5 were not described in particular, but steel materials, castings, composites may be used as long as the required strength, environmental resistance, life, etc. are satisfied. A resin, a fiber reinforced plastic, or the like may be used alone, or these materials may be used in combination.

１ 逆止弁
２ 第１アダプタ
２ｂ 第１流通孔
２ｃ 第１内側端部（第１流通孔の内側端部）
２ｄ 第１内周面（内周面）
２ｋ 第１空間部
２ｍ 第１弁座（弁座）
２ｎ 第１支持面（支持部）
３ 第２アダプタ
３ｂ 第２流通孔
３ｃ 第２内側端部（第２流通孔の内側端部）
３ｄ 第２内周面（内周面）
３ｋ 第２空間部
３ｍ 第２弁座（弁座）
３ｎ 第２支持面（支持部）
４ 弁体
４ｅ 鍔部（延設部）
５ スプリング（弾性部材）
８ 収容部
８ａ 拡径部
１１ 逆止弁 DESCRIPTION OF SYMBOLS 1 Check valve 2 1st adapter 2b 1st flow hole 2c 1st inner side edge (inner edge part of 1st flow hole)
2d First inner peripheral surface (inner peripheral surface)
2k 1st space part 2m 1st valve seat (valve seat)
2n 1st support surface (support part)
3 Second adapter 3b Second flow hole 3c Second inner end (inner end of second flow hole)
3d Second inner peripheral surface (inner peripheral surface)
3k 2nd space part 3m 2nd valve seat (valve seat)
3n 2nd support surface (support part)
4 Valve body 4e collar part (extension part)
5 Spring (elastic member)
8 Accommodating portion 8a Expanded diameter portion 11 Check valve

Claims (5)

弾性部材によって弁座に付勢される弁体により、一方向の流体の流れを許容し、他方向の流体の流れを規制する逆止弁であって、流体が流れる第１流通孔を有し、該第１流通孔より大径の第１空間部を有する第１アダプタと、流体が流れる第２流通孔を有し、該第２流通孔より大径の第２空間部を有する第２アダプタとが結合して、前記第１空間部及び前記第２空間部により形成される収容部に、前記弁体と前記弾性部材を収容し、
前記第１空間部と前記第１流通孔との間に前記弁体が一方の向きに設置された際に前記弁体と当接する第１弁座を有し、前記第２空間部と前記第２流通孔との間に前記弁体が他方の向きに設置された際に前記弁体と当接する第２弁座を有することを特徴とする逆止弁。 A check valve that allows the flow of fluid in one direction and restricts the flow of fluid in the other direction by a valve body that is biased to the valve seat by an elastic member, and has a first flow hole through which the fluid flows. A second adapter having a first space portion having a larger diameter than the first flow hole and a second flow hole through which a fluid flows and having a second space portion having a diameter larger than the second flow hole. And the valve body and the elastic member are accommodated in the accommodating portion formed by the first space portion and the second space portion,
A first valve seat that contacts the valve body when the valve body is installed in one direction between the first space portion and the first flow hole; A check valve having a second valve seat that comes into contact with the valve body when the valve body is installed in the other direction between the two flow holes. 前記第１弁座及び前記第２弁座は、ともに同径に形成されていることを特徴とする請求項１に記載の逆止弁。   The check valve according to claim 1, wherein the first valve seat and the second valve seat are both formed to have the same diameter. 前記第１空間部の内周面と前記第２空間部の内周面は、ともに同径に形成されていることを特徴とする請求項１または２に記載の逆止弁。   The check valve according to claim 1 or 2, wherein an inner peripheral surface of the first space portion and an inner peripheral surface of the second space portion are formed to have the same diameter. 前記第１空間部及び前記第２空間部には、ともに前記弾性部材を支持する支持部が備えられることを特徴とする請求項１ないし３のいずれかに記載の逆止弁。   The check valve according to any one of claims 1 to 3, wherein the first space portion and the second space portion are each provided with a support portion that supports the elastic member. 前記収容部は拡径部を有し、前記弁体には前記拡径部内を移動可能な延設部が備えられることを特徴とする請求項１ないし４のいずれかに記載の逆止弁。   The check valve according to any one of claims 1 to 4, wherein the accommodating portion has an enlarged diameter portion, and the valve body is provided with an extending portion that is movable in the enlarged diameter portion.
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CN106246960A (en) * 2016-08-29 2016-12-21 赛洛克流体设备成都有限公司 A kind of check valve being applicable to high-corrosion medium
CN106246963A (en) * 2016-08-26 2016-12-21 赛洛克流体设备成都有限公司 A kind of check valve being applicable to ultralow temperature medium
KR101700835B1 (en) * 2016-11-11 2017-02-13 김운태 Hydraulic or Pneumatic Check Valve
CN106402435A (en) * 2016-08-29 2017-02-15 赛洛克流体设备成都有限公司 Check valve suitable for ultralow temperature
KR101717509B1 (en) * 2016-11-11 2017-03-27 김운태 Variable type Hydraulic or Pneumatic Check Valve
CN109958798A (en) * 2017-12-14 2019-07-02 浙江易达汽车零部件有限公司 A kind of check valve
CN110131452A (en) * 2019-05-29 2019-08-16 河南航天液压气动技术有限公司 A kind of hard sealed relief valve
JP2020029913A (en) * 2018-08-23 2020-02-27 日本エア・リキード株式会社 Check valve, and operation test device having check valve
CN114382815A (en) * 2020-10-06 2022-04-22 和淞科技股份有限公司 Multi-strand spring and multi-strand spring valve body
JP2023501711A (en) * 2019-11-14 2023-01-18 インテグリス・インコーポレーテッド welded check valve

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106246963A (en) * 2016-08-26 2016-12-21 赛洛克流体设备成都有限公司 A kind of check valve being applicable to ultralow temperature medium
CN106246960A (en) * 2016-08-29 2016-12-21 赛洛克流体设备成都有限公司 A kind of check valve being applicable to high-corrosion medium
CN106402435A (en) * 2016-08-29 2017-02-15 赛洛克流体设备成都有限公司 Check valve suitable for ultralow temperature
KR101700835B1 (en) * 2016-11-11 2017-02-13 김운태 Hydraulic or Pneumatic Check Valve
KR101717509B1 (en) * 2016-11-11 2017-03-27 김운태 Variable type Hydraulic or Pneumatic Check Valve
WO2018088818A1 (en) * 2016-11-11 2018-05-17 김운태 Hydraulic/pneumatic check valve
CN109958798A (en) * 2017-12-14 2019-07-02 浙江易达汽车零部件有限公司 A kind of check valve
JP2020029913A (en) * 2018-08-23 2020-02-27 日本エア・リキード株式会社 Check valve, and operation test device having check valve
JP7140599B2 (en) 2018-08-23 2022-09-21 日本エア・リキード合同会社 CHECK VALVE AND OPERATION TESTING DEVICE HAVING THE CHECK VALVE
CN110131452A (en) * 2019-05-29 2019-08-16 河南航天液压气动技术有限公司 A kind of hard sealed relief valve
JP2023501711A (en) * 2019-11-14 2023-01-18 インテグリス・インコーポレーテッド welded check valve
JP7480290B2 (en) 2019-11-14 2024-05-09 インテグリス・インコーポレーテッド Welded check valve
CN114382815A (en) * 2020-10-06 2022-04-22 和淞科技股份有限公司 Multi-strand spring and multi-strand spring valve body

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