• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A check valve (10a) for a housing (12) with first and second adjacent openings (14, 16) separated by a partition (18) includes a hinge, a first leaf (26) and a second leaf. The hinge (22) is located downstream of the partition. The first leaf is anchored by the hinge, and is pivotable about the hinge to block the first opening when in a closed position. The second leaf is anchored by the hinge, and includes a first leaf section (30) and a counterweight section (32a). The section of the primary leaf is pivotable around the hinge to block the second opening when in the closed position. The counterweight section extends upstream from the section of the primary flap, and substantially parallel thereto, toward the first opening.
    公开号:FR3018890A1
    申请号:FR1552238
    申请日:2015-03-18
    公开日:2015-09-25
    发明作者:Feng Feng；Josh Kamp
    申请人:Hamilton Sundstrand Corp；
    IPC主号:
    专利说明:

    [0001] BACKGROUND OF THE INVENTION The present invention generally relates to liquid flow valves, and more particularly to a nonreturn valve with a reduced or controlled opening speed. [0002] Check valves are one-way valves used in a variety of applications to facilitate the monodirectional flow of liquid. When a pressure difference in a check valve in the flow direction is greater than a set pressure, the valve opens. The check valves can take a variety of shapes, including a diaphragm, a bullet, a duckbill and flapper valves. Some check valves have covered openings, in the closed state, by hinged flaps that can open only in one direction (ie, in the direction of the liquid flow). Such check valves generally include thrust pins to stop the opening of the leaves at a predetermined maximum angle. When the pressure difference in the check valve drops sufficiently, or changes direction, the check valve closes. The wings of the check valves based on wings can be damaged by repeated impacts against the stop pins. This damage may, for example, take the form of a crack or deformation and reduce the service life of the parts. SUMMARY [0004] A check valve for a housing with first and second adjacent openings separated by a partition comprises a hinge, a first leaf and a second leaf. The hinge is located downstream of the partition. The first leaf is anchored by the hinge, and is pivotable about the hinge to block the first opening when in a closed position. The second leaf is anchored by the hinge, and includes a primary leaf section and a counterweight section. The section of the primary leaf is pivotable around the hinge to block the second opening when in the closed position. The counterweight section extends upstream from, and substantially parallel to, the primary leaf section toward the first opening.
    [0002] BRIEF DESCRIPTION OF THE FIGURES [0005] FIG. 1 is a perspective view of an embodiment of a non-return valve according to the present invention. 10006] FIG. 2 is a sectional view of the non-return valve, along section line A-A of FIG. 1, illustrating both the closed (solid) state and the open (grayed) state of the check valve. [0007] FIG. 3 is a sectional view of the non-return valve, along sectional line A-A of FIG. 1, illustrating the forces on the valve in an intermediate state. [0008] FIG. 4 is a perspective view of another embodiment of a non-return valve according to the present invention along the section line B-B. [0009] FIG. 5 is a sectional view of the non-return valve, along section line B-B of FIG. 4, illustrating both the closed state (solid) and the open state (grayed) of the non-return valve. [0010] FIG. 6 is a sectional view of the non-return valve, along section line B-B of FIG. 4, illustrating the forces on the valve in an intermediate state.
    [0003] DETAILED DESCRIPTION [0011] Conventional check valves with hinged flaps may be damaged when the flaps open quickly and bump against the stop pins. The present invention reduces wear and increases the service life of the parts by reducing the opening speeds of the hinged flaps, so that the impact of the flap against the stop pin is less strong. FIGS. 1-3 illustrate a check valve 10a, an embodiment of a nonreturn valve according to the present invention. FIG. 1 is a perspective view of the non-return valve 10a. FIG. 2 is a sectional view of the check valve 10a along section line A-A of FIG. 1, illustrating both the open state (solid lines) and the closed state (grayed out) of the nonreturn valve 10a. FIG. 3 is a sectional view of a check valve 10a through section line A-A of FIG. 1, illustrating an intermediate state of the check valve 10a, as well as the forces and torques on the check valve 10a. The check valve 10a may, for example, be a liquid flow check valve for an air management system of the purge of a gas turbine. 100131 FIGs. 1-3 illustrate the housing 12 with the first opening 14 and the second opening 16 separated by a partition 18. The housing 12 also comprises a post 20, which supports the hinge 22 and the stop pin 24. The hinge 22 rotating anchor the first wing 26 and the second wing 28a. The second leaf 28a includes a primary leaf section 30, a counterweight section 32a, and a leg 34. The casing 12 is a rigid housing constraining the liquid. In the illustrated embodiment, the housing 12 is a substantially or locally flat wall. In other embodiments, the housing 12 may, for example, be a tube or a surface of any construction. As illustrated in FIG. 1, the first and second openings 14 and 16 are symmetrical, substantially semicircular openings through the housing 12, separated by a partition 18. The openings 14 and 16 may take other forms in alternative embodiments, and must not have the same shape and / or size. The first and second leaves 26 and 28a are articulated on a hinge 22, which is located immediately downstream of the partition 18. In a firm position, the first and second leaves 26 and 28a align with the first and the second openings, and close them, respectively. A calibration pressure difference across the check valve 10a exerts an opening force and a corresponding opening torque on the first and second leaves 28a which causes the first and second leaves 26 and 28a to rotate around the opening. hinge 22 until it is stopped by a stop pin 24 in an open position, as described in more detail below. When the first and second leaves 26 and 28b are in the open position, the check valve 10a is in an open state which allows a substantially free liquid flow. When the first and second leaves are in a closed position, the check valve 10a is in a closed state which prevents the flow of liquid. As illustrated herein, any positive pressure difference across the check valve 10a (i.e., higher pressure upstream than downstream) will cause the check valve 10a to open and its holding in the open position, while a negative pressure difference through the check valve 10a (ie, a stronger pressure downstream than upstream) will cause the closure of the check valve 10a and its holding in closed position. In alternative embodiments, the first and second leaves 26 and 28a may be forced to a closed position, so that at least one threshold set pressure difference is required to open the check valve 10a. As illustrated in FIG. 1-3, the second leaf 28a includes a primary leaf section 30, a counterweight section 32a, and a leg 34. The primary leaf section 30 is substantially parallel to the first leaf 26. The first leaf 26 and the primary leaf section Substantially correspond to the shape and size of the first and second openings 14 and 16, respectively, and completely block the first and second openings 14 and 16 in the closed position, creating a seal. In the illustrated embodiment, the counterweight section 32a extends upstream from, and substantially parallel to, the primary leaf section, 30. The leg 34 extends the connections of the counterweight section 32a to the primary leaf section 30. When the check valve 10a is in a closed state, and the first and second leaves 26 and 28a are in their respective closed positions, the leg 34 passes through the second opening 16 and the section counterweight 32a extends parallel to the first leaf 26, partially closing the first opening 14. When the check valve 10a is in a closed state, the counterweight section 32a is located on the opposite side of the casing 12 from the first leaf 26 and the primary leaf section 30. In some embodiments, the counterweight section 32a may close 75% or more of the first opening 14 while the second leaf 28a is in its closed position. In other embodiments, the counterweight section 32a may close 80% or more of the first opening 14 when the second leaf 28a is in its closed position. The counterweight section 32a reduces the opening speed of the check valve 10a, reducing the impact force of the first and second leaves 26 and 28a, respectively, on the stop pin 24. When the check valve -Return 10a undergoes a positive pressure difference, the liquid pressure exerts a first opening force F01 on the first leaf 26, which results in a first opening torque you, and a second opening force F02 on the primary leaf section 30 of the second leaf 28a, which results in a second toe opening torque (see FIG 3). By partially closing the first opening 14 when the nonreturn valve 10a is in a closed state, the counterweight section 32a reduces the opening force Fol, and correspondingly reduces the first opening torque T01. As illustrated in FIG. 2 and 3, the degree to which the counterweight section 32a closes the first opening 14 depends on the angle of rotation of the second leaf 28a, and is described by the projection of the opening Proja. Generally, the opening force F01 is reduced substantially by the fraction of the first opening 14 covered by the projection of the opening Proja. When the first opening 14 is 80% closed by the counterweight section 32a, e.g., the opening force Fait is correspondingly reduced by about 80%, resulting in a low opening speed of the first leaf 26. When the second leaf 28a opens, the projection of the opening Proja decreases, and the opening force Faith is correspondingly less diminished, until the second leaf 28a opens sufficiently for the counterweight section 32a does not close at all the first opening 14, and the projection of the opening Proja disappears completely. Since the first opening torque on the first flap 26 is the cross product of the opening force Faith and the lever arm defined by the first flap 26, however, the first opening torque tends to decrease. when the first leaf 26 moves from a closed position to an open position. The counterbalance section 32a thus provides the greatest reduction at the first opening torque when the first opening torque you would naturally be the largest (ie, when the check valve 10a is in a closed state). The counterweight section 32a also slowed the second leaf opening 28a. When the check valve 10a is exposed to a positive pressure difference, the counterweight section 32a experiences a contradictory force Fc which results in a contradictory pair tc which opposes the second opening pair T02. The second opening torque t02 is greater than the contradictory pair Tc, so that the net torque applied by the positive pressure difference across the nonreturn valve 10a always tends to pivot the second leaf 28b to its open position. The opposing pair 'cc tends to reduce the speed with which the second leaf 28a opens, however, thereby reducing the force of the impact of the primary leaf section 30 on the stop pin 24. In addition, counterweight 32a brings an additional distributed mass to the second leaf 28a, increasing its moment of inertia around the hinge 22 and correspondingly decreasing the opening speed of the second leaf 28a for a given set pressure difference through the anti-lock valve. -return 10a. FIGS. 4-6 illustrate a nonreturn valve 10b, another embodiment of a nonreturn valve according to the present invention. FIG. 4 is a perspective view of the check valve 10b along the cutting line B-B. FIG. 5 is a sectional view of the non-return valve 10b along the section line B-B, illustrating the open and closed conditions of the non-return valve 10b. FIG. 6 is a sectional view of a check valve 10b along the section line B-B, illustrating an intermediate state of the check valve 10b, as well as the forces and torques on the check valve 10a. The check valve 10b may be substantially functionally and structurally identical to the check valve 10a, except as described below. The check valve 10b has a second leaf 28b with a counterweight section 32b. Unlike the counterweight section 32a, the counterweight section 32b has a third opening 36, an opening aligned with the first opening 14 and located in a region of the counterweight section 32b near the partition 18 while the first leaf 28b is in its closed position. In some embodiments, the counterweight section 32b may further extend through the first opening 14, extending at most through the entire first opening 14, as shown in FIG. 5. The total area of the first opening 14 closed by the counterweight section 32b is reduced by the area of the third opening, as shown by the projection of the Projb opening. The illustrated embodiment, e.g., the counterweight section 32b can substantially close the entire opening 14, minus about 20% not covered by the third opening 36, so that the total counterweight section 32b substantially closes. 80% of the first aperture 14. The size and the particular shape of the third aperture 36 may vary without departing from the present invention. The third opening 36 may, for example, be a substantially semicircular or rectangular hole through the counterweight section 32b. When the check valve 10b is in a closed state, or close to its closed state, the counterweight section 32b allows the opening force Fait mainly on a part of the first leaf 26 close to the hinge 22, creating a small opening couple You because of the small size of the real lever arm. Consequently, the first flap 26 of the check valve 10b tends to open more slowly than the first flap 26 of the check valve 10a, for a given fraction of the first opening 14 closed by the counterweight sections 32a or 32b . The check valves 10a and 10b reduce the opening speed of the first and second leaves 26 and 28 (in each embodiment, 28a or 28b), respectively, reducing the first opening torque you, by opposing the second opening torque T02 to the contradictory pair Tc, and increasing the moment of inertia of the second leaf 28. This reduced opening speed increases the longevity of the non-return valves 10a and 10b by reducing or preventing the cracking and / or deformation due to high speed impacts of the wing on the stop pin 24. [0022] Presentation of the Possible Embodiments The following are non-exclusive descriptions of possible embodiments of the present invention. The following are non-exclusive descriptions of possible embodiments of the present invention. A non-return valve for housing with first and second adjacent openings separated by a partition, the check valve comprising: a hinge located downstream of the partition; a first leaf anchored on the hinge, and pivotable about the hinge to block the first opening when in the closed position; a second leaf anchored to the hinge, the second leaf comprising: a primary leaf section pivotable about the hinge to block the second opening when in the closed position; and a counterweight section extending upstream and substantially parallel to the primary leaf section toward the first opening. The check valve of the preceding paragraph may optionally comprise, in addition and / or alternatively, one or more of the following additional elements, features and / or configurations: [0027] Another embodiment of the nonreturn valve previous, also comprising a stop pin located downstream of the hinge, and positioned to stop the opening of the first leaf and the second wing, so that the first and second wings come into contact with the stop pin in a totally open position. Another embodiment of the preceding non-return valve, wherein the second leaf is pivotable so that the counterweight section closes a portion of the first opening when in the closed position. Another embodiment of the preceding check valve wherein the counterweight section closes at least 75% of the first opening when the second leaf is in the closed position. [0030] Another embodiment of the preceding check valve wherein the counterweight section closes at least 80% of the first opening when the second leaf is in the closed position. Another embodiment of the prior check valve wherein the counterweight section has a third opening extending therethrough. [0032] Another embodiment of the previous check valve, in which the second flap is in the closed position, the counterweight section substantially overlaps the entire first opening and the third opening is located upstream of the first opening. . Another embodiment of the previous check valve, wherein when the second leaf is in the closed position, the third leaf is aligned with the first opening. [0034] Another embodiment of the preceding check valve, wherein when the second flap is in the closed position, the third flap is located upstream of the region of the first opening adjacent to the partition. Another embodiment of the preceding non-return valve, wherein the first and second openings are substantially semi-circular. A method for reducing the opening speed of a nonreturn valve having first and second pivotally anchored wings for blocking the first and second openings, respectively, when in the closed position, the method comprising: counterbalancing the second opening with a counterweight section extending from a primary leaf section to the first opening; and partially closing the first opening with the counterweight section, when in the closed position. The method of the preceding paragraph may optionally include, in addition and / or alternatively, one or more of the following additional elements, features and / or configurations: [0038] Another embodiment of the foregoing method, wherein the pressure differential across the check valve exerts an opening torque on a primary leaf section of the second leaf which causes the second wing to pivot to open the second opening, and exerts a contradictory pair on the counterweight section, opposing the opening torques, thus counterbalancing the second opening. [0039] Another embodiment of the preceding method, wherein the closing portion of the first opening comprises interposing the counterweight section downstream of a region of the first opening closest to the second opening. , in the closed position.
    [0004] Another embodiment of the foregoing method, wherein closing a portion of the first opening includes interposing the counterweight section downstream of substantially the entire first opening in the closed position, and wherein the section counterweight comprises a third opening aligned with a region of the first opening closest to the second opening. Another embodiment of the above method, wherein partially closing the first opening with the counterweight section comprises closing at least 75% of the first opening, in the closed position. Although the invention has been described with reference to one or more exemplary embodiments, those skilled in the art will understand that various modifications may be made to the elements described herein, and equivalents may be used in their place without deviate from the scope of the invention. In addition, several modifications may be made to adapt a given situation or material to the teachings of this invention without departing from the essential scope thereof. Thus, it is contemplated that this invention is not limited to the particular disclosed embodiment (s), but that this invention will include all embodiments that are within the scope of the invention described above.
    权利要求:
    Claims (15)
    [0001]
    CLAIMS. A casing check valve (10a, 10b) with first and second adjacent apertures (14, 16) separated by a partition (18), the check valve (10a, 10b) comprising: a hinge (22) located downstream of the partition (18); a first leaf (26) anchored by the hinge (22), and pivotable about the hinge (22) to lock the first opening (14) when in a closed position; A second leaf (28a, 28b) anchored by the hinge (22), the second wing (28a, 28b) comprising: a section of the primary wing (30) pivotable about the hinge (22) to block the second opening (16); ) when in the closed position; and a counterweight section (32a, 32b) extending upstream from and substantially parallel to the section of the primary leaf (30) toward the first opening (14).
    [0002]
    A check valve (10a, 10b) according to claim 1, further comprising an abutment pin (24) located downstream of the hinge (22), and positioned to stop the opening of the first leaf (26) and the second leaf (28a, 28b) so that the first (26) and second leaf (28a, 28b) engage the stop pin (24) in a fully open position. 25
    [0003]
    A check valve (10a, 10b) according to claim 1 or 2, wherein the second leaf (28a, 28b) is pivotable so that the counterweight section (32a, 32b) closes part of the first opening ( 14) when in the closed position.
    [0004]
    The check valve (10a, 10b) according to claim 3, wherein the counterweight section (32a, 32b) closes at least 75% of the first opening (14) when the second leaf (28a, 28b) is in closed position.
    [0005]
    A check valve (10a, 10b) according to claim 3 or 4, wherein the counterweight section (32a, 32b) closes at least 80% of the first opening (14) when closed. second wing (28a, 28b) is in posi
    [0006]
    The check valve (10b) according to any one of claims 1 to 5, has a third opening (36) extending to which the counterweight section (32b) extends therethrough.
    [0007]
    A check valve (10b) according to claim 6, wherein when the second leaf (28b) is in the closed position, the counterweight section (32b) substantially overlaps the entire first opening (14) and the third opening (36) is located upstream of the first opening (14).
    [0008]
    The non-return valve (10b) of claim 7, wherein when the second leaf (28b) is in the closed position, the third leaf is aligned with the first opening (14).
    [0009]
    A check valve (10b) according to claim 8, wherein when the second leaf (28b) is in the closed position, the third leaf is upstream of the region of the first opening (14) adjacent to the wall (18).
    [0010]
    A check valve (10a, 10b) according to any of claims 1 to 9, wherein the first and second openings (14, 16) are substantially semicircular. 25
    [0011]
    A method for reducing the opening speed of a check valve (10a) having first (26) and second wings (28a, 28b) pivotally anchored to lock the first and second openings (14a). , 16), respectively when in the closed position, the method comprising: counterbalancing the second opening (16) with a counterweight section (32a, 32b) extending from the first leaf section (30) towards the first opening (14); and partially closing the first opening (14) with the counterweight section (32a, 32b) when in the closed position.
    [0012]
    The method of claim 11, wherein the pressure difference across the check valve (10a, 10b) exerts an opening torque on a primary leaf section (30) of the second leaf (28a, 28b) which causes the second leaf (28a, 28b) to pivot to open the second opening (16), and exerts a contradictory pair on the counterweight section (32a, 32b), opposing the opening torques, thus counterbalancing the second opening (16).
    [0013]
    The method of claim 11 or 12, wherein closing a portion of the first opening (14) comprises interposing the counterweight section (32a, 32b) downstream of a region of the first opening (14) closest to the second opening (16), in the closed position.
    [0014]
    The method of any one of claims 11 to 13, wherein closing a portion of the first opening (14) comprises interposing the counterweight section (32b) downstream of substantially all of the first opening (14) in the closed position, and wherein the counterweight section (32b) comprises a third opening (36) aligned with a region of the first opening (14) closest to the second opening (16).
    [0015]
    The method of any one of claims 11 to 14, wherein partially closing the first opening (14) with the counterweight section (32a, 32b) comprises closing at least 75% of the first opening (14), in the closed position.
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    同族专利:
    公开号 | 公开日
    US9347573B2|2016-05-24|
    FR3018890B1|2018-06-01|
    US20150267824A1|2015-09-24|
    引用文献:
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    US4942898A|1989-06-19|1990-07-24|Frank Osowski|Automatic culvert directional flow control device|EP3181969B1|2015-12-14|2019-08-07|Hamilton Sundstrand Corporation|Check valve|
    US9803761B1|2016-04-12|2017-10-31|Hs Wroclaw Sp. Z.O.O.|Flapper check valve bumper|
    US11156303B2|2019-05-31|2021-10-26|Mueller International, Llc|Break check valve for hydrant|
    US11204102B2|2020-03-19|2021-12-21|Mueller International, Llc|Watertight check valve|
    法律状态:
    2016-02-22| PLFP| Fee payment|Year of fee payment: 2 |
    2017-02-21| PLFP| Fee payment|Year of fee payment: 3 |
    2017-06-09| PLSC| Publication of the preliminary search report|Effective date: 20170609 |
    2018-02-20| PLFP| Fee payment|Year of fee payment: 4 |
    2020-02-20| PLFP| Fee payment|Year of fee payment: 6 |
    2021-02-19| PLFP| Fee payment|Year of fee payment: 7 |
    2022-02-21| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    US14/219,558|US9347573B2|2014-03-19|2014-03-19|Check valve with reduced opening speed|
    US14219558|2014-03-19|
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