WO2024060697A1 - 一种呼吸阀阀芯及呼吸阀 - Google Patents

一种呼吸阀阀芯及呼吸阀 Download PDF

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Publication number
WO2024060697A1
WO2024060697A1 PCT/CN2023/099362 CN2023099362W WO2024060697A1 WO 2024060697 A1 WO2024060697 A1 WO 2024060697A1 CN 2023099362 W CN2023099362 W CN 2023099362W WO 2024060697 A1 WO2024060697 A1 WO 2024060697A1
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WIPO (PCT)
Prior art keywords
diaphragm
valve
valve core
valve disc
breathing
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PCT/CN2023/099362
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English (en)
French (fr)
Inventor
李姜楠
高阳
陈畅
郑伟
于槟恺
黄佳陆
彭仁杰
陈礼敏
Original Assignee
北京航天石化技术装备工程有限公司
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Application filed by 北京航天石化技术装备工程有限公司 filed Critical 北京航天石化技术装备工程有限公司
Publication of WO2024060697A1 publication Critical patent/WO2024060697A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
    • F16K17/19—Equalising valves predominantly for tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus

Definitions

  • the invention belongs to the technical field of protection valves, and specifically relates to a breathing valve core.
  • the breathing valve is a safety accessory used to prevent the storage tank from rupture or collapse due to exceeding the design pressure/vacuum, maintain the storage tank at normal working pressure, and reduce the volatilization of materials in the tank to reduce environmental pollution.
  • the exhalation valve opens to discharge pressure outward; when the tank pressure is lower than the vacuum set by the breathing valve, the suction valve opens to suck air into the tank.
  • the setting range of the breathing valve is 0.1 ⁇ 103.4kPag and -0.1 ⁇ -48kPag. It adopts gravity or spring loading according to the size of the set point.
  • the traditional breathing valve core connects the valve disc, diaphragm and diaphragm pressure plate into one body through the valve stem nut. Since it is only connected at the valve stem in the center of the valve disc, when the non-sealing side of the valve disc is deformed under pressure, the diaphragm pressure plate cannot If the diaphragm is pressed tightly again, accumulated pressure will be generated between the valve disc and the diaphragm and the diaphragm will be pulled out from between the valve seat and the valve disc, resulting in seal failure and serious leakage.
  • the pressure is set at 0.1 ⁇ 1.0kPag
  • the outlet pressure is greater than 10kPag
  • the vacuum is set at -0.1 ⁇ -1.0kPag
  • the operating pressure in the tank is greater than 10kPag
  • the suction valve and the breathing valve are designed to have a set pressure greater than 10kPag.
  • the working condition of constant vacuum is -0.1 ⁇ -1.0kPag.
  • the diaphragm pressure plate can no longer press the diaphragm tightly.
  • the accumulated pressure between the valve disc and the diaphragm will pull the diaphragm out from between the valve seat and the valve disc, causing sealing loss. As a result, media backflow or leakage may occur.
  • the technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a breathing valve core, and to solve the leakage problem of a low set point high pressure breathing valve.
  • a breathing valve core includes a valve disc, a diaphragm, and a diaphragm pressure plate arranged in sequence.
  • the diameter of the diaphragm pressure plate is smaller than the diaphragm; the center positions of the valve disc, the diaphragm, and the diaphragm pressure plate are fixed through a valve stem; the valve disc , the diaphragm and the diaphragm pressure plate are connected through connectors, and the number of connectors is not less than two.
  • valve disc, diaphragm and diaphragm pressure plate are provided with connection holes, and the connecting member mechanically connects the valve disc, diaphragm and diaphragm through the connection holes.
  • the connecting member can be a bolt, and the valve disc, diaphragm and diaphragm pressure plate are connected and fixed by bolts.
  • the valve disc should have a recoil structure to meet the need for full opening of the breathing valve at 10% overpressure.
  • the edge of the valve disc facing the diaphragm is provided with a backwash structure.
  • the height of the recoil structure is not less than 2mm.
  • the valve disc should be provided with a buffer groove so that the diaphragm and the valve disc can form a buffer at the valve seat position to prevent the valve seat from impacting the diaphragm when the valve disc returns to its seat, causing damage to the diaphragm.
  • the surface where the valve disc and the diaphragm fit together is provided with an annular buffer groove.
  • the position where the diaphragm is not facing the diaphragm pressure plate is the annular portion, and the buffer groove is opposite to the annular portion.
  • the angle between the folded edges of the buffer groove and the bottom surface of the buffer groove is 90° to 150°.
  • the diaphragm should be made of flexible material.
  • Flexible materials include rubber, PTFE, FEP or PFA.
  • valve disc is made of stainless steel, or a low-density, high-stiffness material; low-density, high-stiffness material Materials include aluminum alloy and titanium alloy.
  • valve disc is provided with reinforcing ribs, or the valve disc adopts a reinforced structure.
  • valve disc is provided with but not limited to radial and or circumferential reinforcing ribs, or adopts arch-shaped and other reinforcing structures.
  • the minimum set point of the valve core is in the range of 0.1 ⁇ 0.3 or -0.1 ⁇ -0.3kPag.
  • valve disc should be stamped or otherwise processed to reduce quality and meet the minimum set point requirement of ⁇ 0.1kPag.
  • the present invention ensures that the diaphragm pressure plate is close to the diaphragm and ensures that the valve core still maintains a sealing state at a low set point and high pressure.
  • valve disc of the present invention adopts a buffer groove design to ensure that the valve seat will not impact the diaphragm when returning to the seat, thereby increasing the service life of the diaphragm.
  • valve disc of the present invention adopts a recoil structure design to ensure that the breathing valve can be fully opened at 10% overpressure.
  • the valve core of the breathing valve of the present invention adopts a stamped valve disc, which is guaranteed to meet the minimum set point requirement of 0.1 ⁇ 0.3kPag or -0.1 ⁇ -0.3kPag.
  • the breathing valve core of the present invention not only meets the sealing requirements of low set point and high pressure working conditions, but also ensures that the lowest set point of the valve is maintained at 0.1 ⁇ 0.3 or -0.1 ⁇ -0.3kPag.
  • the discharge capacity of the breathing valve and the service life of the diaphragm are affected.
  • FIG1 is a schematic diagram of the structure of a breathing valve core in an embodiment of the present invention.
  • FIG2 is a schematic diagram of a partial enlarged structure of point A in FIG1 ;
  • Figure 3 is an exploded view of the valve core of Figure 1;
  • Figure 4 is a schematic diagram of a single call valve specifically applied to the valve core in carding according to the present invention.
  • Figure 5 is a schematic diagram of a single suction valve
  • Figure 6 is a schematic diagram of a breathing valve.
  • the embodiment of the present application discloses a breathing valve core.
  • a breathing valve core Referring to Figures 1 and 3, it includes: a valve disc 1, a diaphragm 2, a diaphragm pressure plate 3, a valve stem 4 and other parts.
  • the valve stem 4 is fixed at the center of the valve disc 1, and the valve disc 1 is provided with a number of connecting holes; the lower surface of the valve disc 1 is close to the slightly smaller diameter diaphragm 2, and the center of the diaphragm 2 is fixed to the valve stem 4, and is provided with There are several connecting holes aligned with the connecting holes of the valve disc 1; the lower side of the diaphragm 2 is close to the diaphragm pressure plate 3 with a slightly smaller diameter.
  • the center of the diaphragm pressure plate 3 is fixed to the valve stem 4, and is provided with several connecting holes to connect to the diaphragm 2. Align the holes; the end of the valve stem 4 is connected through the nut 5 and the washer 6 to fix it with the valve disc 1, diaphragm 2 and diaphragm pressure plate 3. And fix the valve disc 1, diaphragm 2 and diaphragm pressure plate 3 through the connecting holes through studs 7, nuts 8 and washers 9.
  • a recoil structure 11 of a certain height is provided on the outer extension of the valve disc 1.
  • the recoil structure 11 faces the sealing side, and the height of the recoil structure 11 is not less than 2 mm.
  • the recoil structure 11 will reduce the pressure attenuation on the sealing side of the valve core, and the overall force on the sealing side surface of the valve core will increase.
  • the valve core can rise rapidly to meet the purpose of full opening of 10% overpressure. .
  • the valve disc 1 is provided with an annular buffer groove 12.
  • the buffer groove 12 is located between the valve disc and the diaphragm. 2 on the bonding surface, the position where the diaphragm 2 is not facing the diaphragm pressure plate 3 is the annular part, and the buffer groove 12 is opposite to the annular part.
  • the valve core is in a sealed state: the flexible diaphragm 2 is covered by the weight of the valve disc 1 and covers the sealing surface of the valve seat to achieve sealing of the valve.
  • the side of the flexible diaphragm 2 that is in contact with the sealing surface of the valve seat is the sealing surface, and the other side is the non-sealing surface.
  • the valve disc 1 When the pressure on the non-sealing side is high, the valve disc 1 is deformed under pressure. However, since the diaphragm 2 and the diaphragm pressure plate 3 are fixed to the valve disc 1 through the connecting hole, the diaphragm pressure plate 3 will remain close to the diaphragm 2 as the valve disc 1 deforms, ensuring that the diaphragm 2 will not be pulled out of the valve seat, avoiding leakage problems and solving the sealing requirements under high-pressure working conditions.
  • a valve seat is provided at the inlet position of the housing.
  • the above-mentioned breathing valve core is installed on the sealing side of the housing to contact the valve seat.
  • the housing is equipped with a valve cover, and the valve stem 4 is inserted into the valve cover.
  • the set pressure is between 0.1 and 1.0 kPag, and the outlet pressure is greater than 10 kPag
  • the exhalation valve of the outlet discharge pipe should use the valve core of the present invention.
  • the inlet pressure is lower than the set pressure, the valve is in a sealed state; when the inlet pressure reaches the set pressure, the valve core rises and the medium is discharged from the outlet; and when the outlet pressure is higher, the valve core 10 can avoid the failure caused by the outlet pressure. Seal failure to avoid media backflow.
  • a valve seat is provided at the suction inlet of the housing.
  • the above-mentioned breathing valve core is installed on the sealing side of the housing to contact the valve seat.
  • the housing is equipped with a valve cover, and the valve stem 4 is inserted into the valve cover.
  • the vacuum is set at -0.1 ⁇ -1.0kPag, but the operating pressure in the tank is greater than 10kPag, the valve core of the present invention should be selected.
  • the valve When the inlet pressure is higher than the set vacuum, the valve is in a sealed state; when the inlet pressure reaches the set vacuum, the valve core rises and the medium is sucked in from the suction port; when the operating pressure in the tank is high, the valve core 10 can prevent the tank from The sealing failure caused by the internal high pressure prevents the medium from leaking out from the suction port.
  • the above-mentioned breathing valve core is installed in the housing.
  • a valve seat is provided at the suction inlet of the housing.
  • the sealing side of the breathing valve core is in contact with the valve seat.
  • a valve cover is installed on the housing, and the valve stem 4 is inserted into the housing. Located inside the valve cover. For example, if the vacuum is set at -0.1 ⁇ -1.0kPag and the set pressure is greater than 10kPag, the valve core of the present invention should be selected.
  • the valve When the inlet pressure is higher than the set vacuum and lower than the set vacuum, the valve is in a sealed state; when the inlet pressure reaches the set vacuum, the suction end valve core 10 rises and the medium is sucked in from the suction port; when the inlet pressure reaches the set pressure
  • the valve core at the exhalation end lifts up and the medium is discharged from the outlet; when the operating pressure in the tank is high, the valve core 10 can prevent the high pressure in the tank from causing the sealing failure of the suction end valve core and prevent the medium from leaking out from the suction port.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Check Valves (AREA)

Abstract

本发明公开了一种呼吸阀阀芯，涉及保护阀领域，阀芯的阀杆固定在阀盘的中心位置，阀盘上设有若干个连接孔，且阀盘外延设有反冲结构和缓冲槽；所述阀盘的下表面紧贴直径稍小的膜片，膜片中心与阀杆固定，且设有若干连接孔与阀盘连接孔对齐；膜片下侧紧贴直径稍小的膜片压板，膜片压板中心与阀杆固定，且设有若干连接孔与膜片连接孔对齐；并通过连接孔将阀盘、膜片和膜片压板固定。本发明的呼吸阀阀芯不仅满足低设定点高承压工况密封需求，并在维持阀门最低设定点0.1～0.3或-0.1～-0.3kPag的前提下，保证呼吸阀的排放能力和膜片使用寿命。

Description

一种呼吸阀阀芯及呼吸阀
本申请要求于2022年9月22日提交中国专利局、申请号为202211159789.6、发明名称为“一种呼吸阀阀芯及呼吸阀”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明属于保护阀技术领域，具体涉及一种呼吸阀阀芯。
背景技术
呼吸阀是一种用于防止储罐因超过设计压力/真空而出现破裂或抽瘪情况的安全附件，维持储罐在正常工作压力，并减少罐内物料挥发降低环境污染。通常安装在储罐顶部，当罐压超过呼吸阀的设定压力时，呼阀打开向外排放压力；当罐压低于呼吸阀设定真空时，吸阀打开向罐内吸入空气。
呼吸阀的设定范围为0.1～103.4kPag和-0.1～-48kPag，根据设定点大小采用重力或弹簧加载形式。传统呼吸阀阀芯通过阀杆螺母将阀盘、膜片和膜片压板连接成一体，由于仅在阀盘中心的阀杆处连接，当阀盘非密封侧受压产生变形时膜片压板无法再紧压膜片，阀盘和膜片间产生累积压力将膜片从阀座与阀盘间抽出，导致密封失效出现严重泄漏。
例如设定压力在0.1～1.0kPag，出口压力存在大于10kPag情况的呼阀；设定真空在-0.1～-1.0kPag，罐内操作压力大于10kPag的吸阀和呼吸阀设定压力大于10kPag而设定真空在-0.1～-1.0kPag的工况。上述情况由于呼出或吸入端设定点较低，要通过减小阀盘厚度来降低质量以满足低设定点的需要，导致阀盘强度变差，当非密封侧承受较大压力时会出现很大变形，膜片压板无法再紧压膜片，阀盘和膜片间的累积压力将膜片从阀座与阀盘间抽出，导致密封失 效出现介质回流或外漏的情况。
因此针对低设定点高承压的工况，传统呼吸阀阀芯频繁出现泄漏问题，无法满足正常使用需要。
发明内容
本发明解决的技术问题是：克服现有技术的不足，提出一种呼吸阀阀芯，解决了低设定点高承压呼吸阀的泄漏问题。
本发明的技术解决方案是：
一种呼吸阀阀芯，包括依次设置的阀盘、膜片、膜片压板，膜片压板的直径小于膜片；阀盘、膜片、膜片压板的中心位置通过阀杆进行固定；阀盘、膜片和膜片压板之间通过连接件连接，连接件数量不少于两个。
优选的，所述阀盘、膜片和膜片压板上设有连接孔，连接件通过连接孔将阀盘、膜片、膜片之间进行机械连接。
优选的，所述连接件可以为螺栓，阀盘、膜片和膜片压板之间通过螺栓连接固定。
优选的，所述阀盘应有反冲结构以满足呼吸阀10％超压全开启的需要。
具体的，所述阀盘朝向膜片一侧的边缘设有反冲结构。所述反冲结构高度不小于2mm。
优选的，所述阀盘应设有缓冲槽，在阀座位置膜片与阀盘能形成缓冲，避免阀盘回座时阀座对膜片造成冲击，导致膜片损伤。
具体的，所述阀盘与膜片贴合的表面设有环形的缓冲槽，膜片未与膜片压板正对的位置为环形部，缓冲槽与环形部相对。
优选的，所述缓冲槽的折边与缓冲槽底面的夹角为90°～150°。
优选的，所述膜片宜选用柔性材料。柔性材料包括橡胶、PTFE、FEP或PFA。
优选的，所述阀盘为不锈钢材质，或为低密度高刚度材料；低密度高刚度 材料包括铝合金、钛合金。
优选的，所述阀盘设有加强筋，或阀盘采用增强结构。
具体的，阀盘设有不限于径向和或环向加强筋，或采用拱形等增强结构。
优选的，所述阀芯设定点最小在0.1～0.3或-0.1～-0.3kPag范围内。
进一步，所述阀盘应采用冲压或其它加工方式以降低质量，满足设定点最小±0.1kPag的需要。
综上所述，本申请至少包括以下有益技术效果：
(1)本发明通过固定阀盘、膜片和膜片压板的连接孔，保证膜片压板紧贴膜片，确保阀芯在低设定点高承压时依然维持密封状态。
(2)本发明阀盘采用缓冲槽设计，保证回座时阀座不会对膜片造成冲击，提高膜片使用寿命。
(3)本发明阀盘采用反冲结构设计，保证呼吸阀可以在10％超压时实现全开启。
(4)本发明呼吸阀阀芯采用冲压形式阀盘，保证可以满足设定点最小0.1～0.3kPag或-0.1～-0.3kPag的需要。
综上所述，本发明的呼吸阀阀芯不仅满足低设定点高承压工况密封需求，并在维持阀门最低设定点0.1～0.3或-0.1～-0.3kPag的前提下，同时保证了呼吸阀的排放能力和膜片使用寿命。
附图说明
图1为本发明实施例中的呼吸阀阀芯结构示意图；
图2为图1的A处的局部放大结构示意图；
图3为图1的阀芯的爆炸图；
图4为本发明是梳理中的阀芯具体应用的单呼阀示意图；
图5为单吸阀示意图；
图6为呼吸阀示意图。
附图标记：1、阀盘；2、膜片；3、膜片压板；4、阀杆；5、螺母；6、垫圈；7、螺柱；8、螺母；9、垫圈；10、呼吸阀阀芯；11、反冲结构；12、缓冲槽。
具体实施方式
下面结合附图和具体实施例对本申请作进一步详细的描述：
本申请实施例公开一种呼吸阀阀芯，参照图1和图3，包括：阀盘1、膜片2、膜片压板3和阀杆4等零件。阀杆4固定在阀盘1的中心位置，阀盘1上设有若干连接孔；阀盘1的下表面紧贴直径稍小的膜片2，膜片2中心与阀杆4固定，且设有若干连接孔与阀盘1连接孔对齐；膜片2下侧紧贴直径稍小的膜片压板3，膜片压板3中心与阀杆4固定，且设有若干连接孔与膜片2连接孔对齐；阀杆4末端通过螺母5和垫圈6连接，将其与阀盘1、膜片2和膜片压板3固定。并通过螺柱7、螺母8和垫圈9将阀盘1、膜片2和膜片压板3通过连接孔固定。
如图2所示，阀盘1外延设有一定高度的反冲结构11，反冲结构11朝向密封侧，反冲结构11高度不小于2mm。当阀芯升起时反冲结构11会减小阀芯密封侧压力衰减，阀芯密封侧表面上整体受力变大，阀芯能够迅速的升高，以满足10％超压全开启的目的。
如图2所示，阀盘1上设有环形的缓冲槽12，缓冲槽12位于阀盘与膜片 2贴合的表面，膜片2未与膜片压板3正对的位置为环形部，缓冲槽12与环形部相对。阀芯打开时缓冲槽12内会充满气体形成一个气毯，当阀芯回座时气毯会缓解阀座对膜片2的冲击，减小膜片损耗提高工作寿命。
本发明的工作原理：
阀芯处在密封状态：柔性膜片2受到阀盘1重量作用包覆在阀座密封面，实现阀门的密封。柔性膜片2与阀座密封面贴合的一侧为密封面，另一侧为非密封面。
当非密封侧压力较高时，阀盘1受压发生变形，但由于膜片2和膜片压板3通过连接孔与阀盘1固定，膜片压板3会随着阀盘1变形依然紧贴膜片2，保证膜片2不会从阀座上抽出，避免出现泄漏问题，解决了高承压工况密封需求。
下面介绍一些常见的应用实例：
如图4所示，壳体的入口位置设有阀座，上述呼吸阀阀芯安装于壳体内密封侧与阀座接触，壳体上装有阀盖，阀杆4插设于阀盖内。例如设定压力在0.1～1.0kPag，出口压力大于10kPag，出口排放管道的呼阀，应选用本发明阀芯。当入口压力低于设定压力时，阀门处于密封状态；当入口压力达到设定压力时，阀芯升起介质从出口排出；而当出口压力较高时，阀芯10可以避免出口压力引起的密封失效，避免介质回流。
如图5所示，壳体的吸入口位置设有阀座，上述呼吸阀阀芯安装于壳体内密封侧与阀座接触，壳体上装有阀盖，阀杆4插设于阀盖内。例如设定真空在-0.1～-1.0kPag，但罐内操作压力大于10kPag的单吸阀，应选用本发明阀芯。 当入口压力高于设定真空时，阀门处于密封状态；当入口压力达到设定真空时，阀芯升起介质从吸入口吸入；而当罐内操作压力较高时，阀芯10可以避免罐内高压造成的密封失效，避免介质从吸入口外漏。
如图6所示，上述呼吸阀阀芯安装于壳体内，壳体的吸入口位置设有阀座，呼吸阀阀芯的密封侧与阀座接触，壳体上装有阀盖，阀杆4插设于阀盖内。例如设定真空在-0.1～-1.0kPag，设定压力大于10kPag的呼吸阀，应选用本发明阀芯。当入口压力高于设定真空且低于设定真空时，阀门处于密封状态；当入口压力达到设定真空时，吸入端阀芯10升起介质从吸入口吸入；当入口压力达到设定压力时，呼出端阀芯升起介质从出口排出；而当罐内操作压力较高时，阀芯10可以避免罐内高压引起吸入端阀芯密封失效，避免介质从吸入口外漏。
以上所述仅为发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种呼吸阀阀芯，其特征在于：包括依次设置的阀盘(1)、膜片(2)、膜片压板(3)，膜片压板(3)的直径小于膜片(2)；
    阀盘(1)、膜片(2)、膜片压板(3)的中心位置通过阀杆(4)进行固定；
    阀盘(1)、膜片(2)和膜片压板(3)之间通过连接件连接，连接件数量不少于两个。
  2. 根据权利要求1所述的一种呼吸阀阀芯，其特征在于：所述阀盘(1)、膜片(2)和膜片压板(3)上设有连接孔，连接件通过连接孔将阀盘(1)、膜片(2)、膜片压板(3)之间进行机械连接。
  3. 根据权利要求1所述的一种呼吸阀阀芯，其特征在于：所述连接件以阀盘(1)圆心为中心呈中心对称分布。
  4. 根据权利要求1所述的一种呼吸阀阀芯，其特征在于：所述阀盘(1)与膜片(2)贴合的表面设有环形的缓冲槽(12)，膜片(2)超出膜片压板(3)边缘的位置为环形部，缓冲槽(12)与环形部相对。
  5. 根据权利要求4所述的一种呼吸阀阀芯，其特征在于：所述缓冲槽(12)的折边与缓冲槽(12)底面的夹角为90°～150°。
  6. 根据权利要求5所述的一种呼吸阀阀芯，其特征在于：所述缓冲槽深度不小于0.5mm。
  7. 根据权利要求1所述的一种呼吸阀阀芯，其特征在于：所述阀盘(1)朝向膜片(2)一侧的边缘设有反冲结构(11)，反冲结构(11)高度不小于2mm。
  8. 根据权利要求1所述的一种呼吸阀阀芯，其特征在于：所述膜片(2)为柔性材料；柔性材料包括橡胶、PTFE、FEP或PFA；
    阀盘(1)为不锈钢材质，或为低密度高刚度材料；低密度高刚度材料包括铝合金、钛合金；
    阀盘(1)设有加强筋，或阀盘(1)采用增强结构。
  9. 根据权利要求1所述的一种呼吸阀阀芯，其特征在于：所述阀芯设定点最小在0.1～0.3或-0.1～-0.3kPag范围内。
  10. 一种呼吸阀阀芯，其特征在于：包括阀座、以及根据权利要求1-9任一所述的呼吸阀阀芯(10)，呼吸阀阀芯(10)的密封侧与阀座的密封面贴合。
PCT/CN2023/099362 2022-09-22 2023-06-09 一种呼吸阀阀芯及呼吸阀 WO2024060697A1 (zh)

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