WO2022078135A1 - 一种用于低压工况的单向阀 - Google Patents

一种用于低压工况的单向阀 Download PDF

Info

Publication number
WO2022078135A1
WO2022078135A1 PCT/CN2021/117737 CN2021117737W WO2022078135A1 WO 2022078135 A1 WO2022078135 A1 WO 2022078135A1 CN 2021117737 W CN2021117737 W CN 2021117737W WO 2022078135 A1 WO2022078135 A1 WO 2022078135A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
channel
pressure chamber
way valve
diaphragm
Prior art date
Application number
PCT/CN2021/117737
Other languages
English (en)
French (fr)
Inventor
卫晓霞
鲍鲜宇
李娜
王亦逍
郭善刚
边玲
于红辉
帅鹏
李晓峰
王学彬
陈殿京
唐旭丽
Original Assignee
北京航天石化技术装备工程有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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
Priority to US18/028,077 priority Critical patent/US20240026985A1/en
Publication of WO2022078135A1 publication Critical patent/WO2022078135A1/zh

Links

Images

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
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/144—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery
    • 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
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/54—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves

Definitions

  • the invention belongs to the technical field of one-way sealing, and particularly relates to a one-way valve for low-pressure working conditions.
  • the one-way valve In industrial production, the one-way valve is widely used, and its main function is to only allow the medium to flow in one direction and not in the opposite direction. In the field of safety valves, since there is sometimes back pressure at the outlet of the safety valve, in order to avoid the influence of the back pressure on the opening of the safety valve, several one-way valves will be reasonably connected and used as a backflow protector.
  • a one-way valve consists of a valve body, a valve cover, a valve seat, a valve disc assembly, a spring, and a spring washer, wherein the valve seat, the valve disc assembly and the spring are installed on the valve body and the valve cover.
  • the valve seat is installed between the valve body and the valve cover, and the seal is realized by the spring gasket;
  • the valve disc assembly is installed in the valve body cavity, including the valve disc and the sealing gasket, and the sealing gasket is lined at one end of the valve disc, and The valve seat is sealed; the spring is mounted on the other end of the disc.
  • the inventors have made keen research to provide a one-way valve for low-pressure working conditions, breaking the traditional one-way valve structure design concept, by using the valve body, valve cover, upper membrane
  • the combination design of the diaphragm and the preferred lower diaphragm and elastic cylindrical pin enables the medium to be opened quickly when passing through the one-way valve.
  • the pressure difference caused by the different contact areas of the upper and lower surfaces of the upper diaphragm can be used. and the higher the pressure, the better the sealing effect, thus completing the present invention
  • a one-way valve for low-pressure working conditions comprising: a valve cover, a valve body and an upper diaphragm, wherein the upper diaphragm is laid between the valve cover and the valve body, and the three are tightly connected by tightening threaded connectors , the lower surface of the valve cover is provided with a first pressure chamber for accommodating the reverse medium;
  • the inside of the valve body is provided with an inflow channel and an outflow channel, a second pressure cavity is machined on the upper surface, an inflow hole is machined from the inner wall of the inflow channel to the bottom surface of the second pressure cavity, and the medium flows from the inflow channel. Enter the second pressure chamber through the inflow hole, and apply upward pressure to the upper diaphragm, so that the upper diaphragm moves toward the direction of the valve cover;
  • the outflow channel includes a vertical outflow channel and a horizontal outflow channel.
  • the inlet end of the vertical outflow channel is located on the upper surface of the valve body, the outlet end is communicated with the horizontal outflow channel, and the second pressure chamber is connected to the vertical outflow channel.
  • the inlet ends of the channels all fall within the coverage of the first pressure chamber.
  • the side wall of the horizontal outlet channel is machined with a counter-flow groove that communicates with the first pressure chamber.
  • a part of the reverse medium entering the horizontal outlet channel enters the first pressure chamber through the counter-flow groove, and the other part enters the vertical outlet channel.
  • the contact area with the upper surface of the upper diaphragm is larger than the contact area with the lower surface of the upper diaphragm, and reverse sealing is performed by the pressure difference between the upper and lower surfaces of the upper diaphragm.
  • the one-way valve for low-pressure working conditions breaks the structural design concept of the traditional one-way valve.
  • the combined design uses the pressure difference caused by the different contact areas of the upper and lower surfaces of the upper diaphragm to achieve a good seal when the low-pressure medium passes through the check valve in the reverse direction, and the higher the pressure, the better the sealing effect;
  • a one-way valve for low-pressure working conditions provided by the present invention can quickly open the one-way valve under low pressure by fixing an elastically deformable upper diaphragm between the valve body and the valve cover ;
  • the one-way valve for low-pressure working conditions provided by the present invention adopts a slope design for the inflow hole, so that the medium can smoothly enter the inflow hole after entering the inflow channel, reducing the leakage of the medium in the inflow channel due to the medium hole.
  • the one-way valve for low-pressure working conditions provided by the present invention is designed for the height of the first pressure chamber, which can control the upper diaphragm within a suitable deformation range, which is beneficial to the high-frequency use of the upper diaphragm;
  • the lower diaphragm is placed in the second pressure chamber, and the height of the lower diaphragm is designed, which can play a role in the sealing of the upper diaphragm.
  • the function of support reduces the deformation of the upper diaphragm, and the upper and lower surfaces of the upper diaphragm can be sealed with a small deformation caused by a small pressure difference;
  • an elastic cylindrical pin is installed in the reverse flow groove, and the upper end of the elastic cylindrical pin enters the first pressure chamber, which is beneficial for the reverse medium to flow into the first pressure chamber. seal;
  • the present invention provides a one-way valve for low-pressure working conditions.
  • the vertical outflow channel on the valve body is located on the axis of the valve body, and the annular second pressure chamber is located at the periphery of the vertical outflow channel. This design makes the force on the upper diaphragm relatively uniform, which is beneficial to improve the service life.
  • FIG. 1 shows a schematic cross-sectional structure diagram of a one-way valve used in a low-pressure working condition in a preferred embodiment of the present invention
  • Figure 2 shows a top view of the valve body in a preferred embodiment of the present invention.
  • the present invention provides a one-way valve for low pressure conditions, as shown in FIG. 1 , comprising: a valve cover 1, a valve body 2 and an upper diaphragm 3, wherein the upper diaphragm 3 is laid on the valve cover 1 and the valve Between the body 2, the three are tightly connected by tightening threaded connectors (such as bolts and screws).
  • the lower surface of the valve cover 1 has a first pressure cavity 11 for accommodating the reverse medium.
  • the upper diaphragm 3 exerts downward pressure;
  • the inside of the valve body 2 is provided with an inflow channel 22 and an outflow channel, a second pressure cavity 21 is processed on the upper surface, and an inflow hole 221 is processed from the inner wall of the inflow channel 22 to the bottom surface of the second pressure cavity 21 , the medium enters the second pressure chamber 21 from the inflow channel 22 through the inflow hole 221, and exerts upward pressure on the upper diaphragm 3, so that the upper diaphragm 3 moves in the direction of the valve cover 1, as shown in Figures 1 and 2;
  • the outflow channel includes a vertical outflow channel 231 and a horizontal outflow channel 232.
  • the inlet end of the vertical outflow channel 231 is located on the upper surface of the valve body 2, the outlet end is communicated with the horizontal outflow channel 232, and the second pressure chamber is 21 and the inlet end of the vertical outflow channel 231 both fall within the coverage of the first pressure chamber 11.
  • the inflow hole 221 communicates with the vertical outflow channel 231.
  • the medium flows out of the one-way valve after passing through the vertical outflow channel 231 and the horizontal outflow channel 232;
  • a counter-flow groove 233 connected to the first pressure chamber 11 is machined on the side wall of the horizontal outlet flow channel 232.
  • a part of the reverse medium entering the horizontal outlet flow channel 232 enters the first pressure chamber 11 through the counter-flow groove 233, and the other part enters the vertical flow channel 11.
  • the outflow channel 231 is reversely sealed by the pressure difference between the upper and lower surfaces of the upper diaphragm 3 .
  • the medium enters from the left side in FIG. 1 , enters the second pressure chamber 21 of the valve body 2 through the inflow channel 22 , and acts on the lower surface of the upper diaphragm 3 , so that the upper diaphragm 3 goes toward the valve.
  • the cover 1 moves in the direction, the air inlet and the air outlet will be connected, and the medium will flow out through the air outlet.
  • the medium When the medium enters from the right side of the one-way valve in Fig. 1, it will flow in two paths, one of which will enter the first pressure chamber 11 through the reverse flow groove 233, and form a pressure acting on the upper surface of the upper diaphragm 3, forming a downward pressure
  • the other medium forms a pressure at the upper diaphragm 3 and the vertical outflow channel 231, and acts on the lower surface of the upper diaphragm 3 to form an upward force.
  • the downward force acting on the upper diaphragm 3 is greater than the upward force, so that the upper diaphragm
  • the sheet 3 plays the role of the main seal, blocking the flow of the medium from the air outlet to the air inlet, so it can prevent the medium from leaking in the reverse direction.
  • valve cover 1 and the valve body 2 are sealed by water lines.
  • the upper diaphragm 3 may be a diaphragm made of polytetrafluoroethylene, fluorinated ethylene propylene copolymer (FEP), fluororubber cloth and metal material.
  • FEP fluorinated ethylene propylene copolymer
  • the height of the first pressure cavity 11 is within the maximum elastic deformation range of the upper diaphragm 3 in the same direction, so as to avoid plastic deformation of the upper diaphragm 3 and affect the height of the upper diaphragm 3 frequently used.
  • the cross-sectional area of the cavity of the first pressure cavity 11 is as large as possible on the premise of satisfying the structural stability of the one-way valve, so that the downward force of the upper diaphragm 3 is greater than the upward force, which is conducive to preventing leakage.
  • the inflow hole 221 is an oblique flow channel, and the inflow hole 221 is located in front of the inlet of the inner wall of the inflow channel 22 and behind the outlet of the bottom surface of the second pressure chamber 21. After the medium enters the inflow channel 22 , it can smoothly enter the inflow hole 221 from the front inlet, thereby reducing the fluid fluctuation and the sharp increase in pressure caused by the reduction of the medium hole in the inflow channel 22 .
  • the second pressure cavity 21 is an annular cavity located at the periphery of the vertical outlet channel 231 .
  • Circumferential cavity design applies circumferential force to the upper diaphragm. Compared with unilateral force, the upper diaphragm receives more uniform force and prolongs the service life of the upper diaphragm.
  • the vertical outflow channel 231 is located at the axis of the valve body 2 . Further, the cross-sectional area of the vertical outflow channel 231 is as small as possible when the flow requirements are met, which also enables the downward force of the upper diaphragm 3 to be greater than the upward force, which is conducive to preventing leakage.
  • the second pressure chamber 21 is provided with a lower diaphragm 4 , and the thickness of the lower diaphragm 4 is smaller than the height of the second pressure chamber 21 . Further, the thickness of the lower diaphragm 4 is 1/4 to 3/4 of the height of the second pressure cavity 21 .
  • the lower diaphragm is below the upper diaphragm, which can support the upper diaphragm during sealing and reduce the deformation of the upper diaphragm. In this way, the upper and lower surfaces of the upper diaphragm produce small deformation through a small pressure difference, that is, Sealing can be implemented.
  • an elastic cylindrical pin 5 is installed in the reverse flow groove 233 , and the upper end of the elastic cylindrical pin 5 enters the first pressure cavity 11 .
  • the outer wall of the elastic cylindrical pin 5 is in close contact with the inner wall of the first pressure chamber 11 , and at this time, the elastic cylindrical pin 5 plays a role in positioning the reverse flow groove 233 .
  • the above technical solution in the present invention realizes the good sealing performance of the one-way valve under a lower pressure range, so that the low-pressure medium can only flow in one direction in the valve, and solves the difficulty of the current conventional one-way valve under low pressure. Open and leak-prone issues.

Abstract

一种用于低压工况的单向阀，包括：阀盖(1)、阀体(2)和两者之间的上膜片(3)，阀盖(1)的下表面开设第一压腔(11)，用于容纳逆向介质；阀体(2)的上表面加工有第二压腔(21)，内部开设有进流道(22)和出流道，进流道(22)的内壁至第二压腔(21)的底面加工有进流孔(221)，介质由进流道(22)经进流孔(221)进入第二压腔(21)，对上膜片(3)施加向上的压力，使得上膜片(3)向阀盖的方向移动；出流道的侧壁上加工有连通至第一压腔(11)的逆流槽(233)，进入出流道的部分逆向介质可通过逆流槽(233)进入第一压腔(11)，通过上膜片(3)上下表面的压力差进行逆向密封。本单向阀使介质通过单向阀时迅速的开启，同时利用上膜片两侧的压力差，能保证低压下的逆向密封。

Description

一种用于低压工况的单向阀
本申请要求于2020年10月15日提交中国专利局、申请号为202011104363.1、发明名称为“一种用于低压工况的单向阀”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
本发明属于单向密封技术领域，特别涉及一种用于低压工况的单向阀。
背景技术
在工业生产中，单向阀的使用非常广泛，主要作用是只允许介质沿一个方向流动而不能反向流动。在安全阀领域，由于安全阀的出口有时会存在背压，为了避免背压对安全阀的开启造成影响，会将几个单向阀合理的连接，作为回流保护器使用。
在现有技术中，单向阀由阀体、阀盖、阀座、阀瓣组件和弹簧、弹垫这些零部件组成，其中阀座、阀瓣组件和弹簧安装在阀体和阀盖组成的空腔中；阀座安装在阀体和阀盖间，通过弹垫实现密封；阀瓣组件安装在阀体腔内，包括阀瓣和密封垫两部分，密封垫内衬在阀瓣的一端，与阀座实现密封；弹簧安装在阀瓣另一端。逆向给压时，即从弹簧一端通压时，由于阀瓣组件与阀座间是密封的，介质不能流通；而正向给压时，介质压力推动阀瓣组件和弹簧，阀门开启，介质通过。
当单向阀进口压力过低时，弹簧不容易被压缩，开启难度增大。当出口压力低时，阀瓣组件与密封垫之间会出现密封不严、泄露情况。
因此，在低压工况下，如何使介质通过单向阀时迅速的开启，逆向通过单向阀时保证很好的密封是亟需解决的技术问题。
发明内容
为了克服现有技术中的不足，本发明人进行了锐意研究，提供了一种用于 低压工况的单向阀，打破传统单向阀结构设计构思，通过采用阀体、阀盖、上膜片以及优选的下膜片和弹性圆柱销的组合设计，使介质通过单向阀时迅速的开启，同时利用上膜片上下表面的接触面积不同造成的压力差，低压介质逆向时能实现很好的密封，且压力越高密封效果越好，从而完成本发明
本发明提供的技术方案如下：
一种用于低压工况的单向阀，包括：阀盖、阀体和上膜片，其中，上膜片铺设于阀盖和阀体之间，通过紧固螺纹连接件将三者紧密连接，所述阀盖的下表面开设第一压腔，用于容纳逆向介质；
所述阀体的内部开设有进流道和出流道，上表面加工有第二压腔，所述进流道的内壁至第二压腔的底面加工有进流孔，介质由进流道经进流孔进入第二压腔，对上膜片施加向上的压力，使得上膜片向阀盖的方向移动；
所述出流道包括竖向出流道和水平出流道，竖向出流道的进口端位于阀体的上表面，出口端与水平出流道连通，第二压腔与竖向出流道的进口端均落入第一压腔的覆盖范围内，在上膜片向阀盖的方向移动时，进流孔与竖向出流道连通，介质通过竖向出流道、水平出流道后流出单向阀；
所述水平出流道的侧壁上加工有连通至第一压腔的逆流槽，进入水平出流道的逆向介质一部分通过逆流槽进入第一压腔，另一部分进入竖向出流道，介质与上膜片的上表面的接触面积大于与上膜片的下表面的接触面积，通过上膜片上下表面的压力差进行逆向密封。
根据本发明提供的一种用于低压工况的单向阀，具有以下有益效果：
(1)本发明提供的一种用于低压工况的单向阀，打破传统单向阀结构设计构思，通过采用阀体、阀盖、上膜片以及优选的下膜片和弹性圆柱销的组合设计，利用上膜片上、下表面的接触面积不同造成的压力差，能使低压介质逆向通过单向阀时实现很好的密封，且压力越高密封效果越好；
(2)本发明提供的一种用于低压工况的单向阀，通过在阀体与阀盖之间固定能够发生弹性形变的上膜片，在较低压力下即可迅速开启单向阀；
(3)本发明提供的一种用于低压工况的单向阀，对进流孔采用斜度设计，介质进入进流道后可顺畅的进入进流孔，降低进流道内由于介质孔道的变小引发的流体波动和压力急剧增加；
(4)本发明提供的一种用于低压工况的单向阀，对第一压腔的高度进行设计，可控制上膜片在适宜的形变范围内，利于上膜片的高频使用；
(5)本发明提供的一种用于低压工况的单向阀，在第二压腔中放置下膜片，且对下膜片的高度进行设计，能够在密封时对上膜片起到支撑的作用，降低上膜片的变形，上膜片上下表面通过较小的压力差产生较小的形变即可实施密封；
(6)本发明提供的一种用于低压工况的单向阀，在逆流槽内安装弹性圆柱销，且弹性圆柱销的上端进入第一压腔，利于逆向介质流入第一压腔，实施密封；
(7)本发明提供的一种用于低压工况的单向阀，阀体上的竖向出流道位于阀体的轴心上，环形第二压腔位于竖向出流道的外围，该设计使上膜片受力相对均匀，利于提高使用寿命。
附图说明
图1示出本发明一种优选实施方式中用于低压工况的单向阀的剖面结构示意图；
图2示出本发明一种优选实施方式中阀体的俯视图。
附图标号说明
1-阀盖、11-第一压腔、2-阀体、21-第二压腔、22-进流道、221-进流孔、231-竖向出流道、232-水平出流道、233-逆流槽、3-上膜片、4-下膜片、5-弹性圆柱销。
具体实施方式
下面通过对本发明进行详细说明，本发明的特点和优点将随着这些说明而变得更为清楚、明确。
本发明提供了一种用于低压工况的单向阀，如图1所示，包括：阀盖1、 阀体2和上膜片3，其中，上膜片3铺设于阀盖1和阀体2之间，通过紧固螺纹连接件(如螺栓和螺钉)将三者紧密连接，所述阀盖1的下表面开设第一压腔11，用于容纳逆向介质，通过容纳的逆向介质对上膜片3施加向下的压力；
所述阀体2的内部开设有进流道22和出流道，上表面加工有第二压腔21，所述进流道22的内壁至第二压腔21的底面加工有进流孔221，介质由进流道22经进流孔221进入第二压腔21，对上膜片3施加向上的压力，使得上膜片3向阀盖1的方向移动，如图1和2所示；
所述出流道包括竖向出流道231和水平出流道232，竖向出流道231的进口端位于阀体2的上表面，出口端与水平出流道232连通，第二压腔21与竖向出流道231的进口端均落入第一压腔11的覆盖范围内，在上膜片3向阀盖1的方向移动时，进流孔221与竖向出流道231连通，介质通过竖向出流道231、水平出流道232后流出单向阀；
所述水平出流道232的侧壁上加工有连通至第一压腔11的逆流槽233，进入水平出流道232的逆向介质一部分通过逆流槽233进入第一压腔11，另一部分进入竖向出流道231，通过上膜片3上下表面的压力差进行逆向密封。
当单向阀工作时，介质从图1中的左侧进入，通过进流道22进入阀体2的第二压腔21中，作用在上膜片3下表面，使得上膜片3往阀盖1方向移动，进气孔与出气孔将连通，介质通过出气孔流出。
当介质从图1单向阀的右侧进入时，将分两路流通，一路通过逆流槽233进入第一压腔11，并形成一个压力作用在上膜片3的上表面，形成了向下的作用力；另一路介质在上膜片3和竖向出流道231处形成一个压力，并作用在上膜片3的下表面形成向上的作用力。由于压力作用在上膜片3的上表面的接触面积大于作用在上膜片3的下表面的接触面积，使得作用在上膜片3上向下的作用力大于向上的作用力，使上膜片3起到了主密封的作用，阻断了介质从出气孔向进气孔之间的流通，因此可以阻止介质逆向泄露。
在本发明一种优选的实施方式中，所述阀盖1和阀体2之间通过水纹线密 封。
在本发明一种优选的实施方式中，所述上膜片3可以为聚四氟乙烯、氟化乙烯丙烯共聚物(FEP)、氟橡胶夹布和金属材质制成的膜片。
在本发明一种优选的实施方式中，所述第一压腔11的高度在上膜片3同方向上的最大弹性形变范围内，避免上膜片3的塑性形变，影响上膜片3的高频使用。
进一步地，所述第一压腔11的腔体横截面积在满足单向阀结构稳定性的前提下尽量大，这样，上膜片3向下的作用力更加大于向上的作用力，利于防泄漏。
在本发明一种优选的实施方式中，所述进流孔221为斜向流道，进流孔221在进流道22内壁的入口靠前，在第二压腔21底面的出口靠后，介质进入进流道22后可顺畅的由靠前的入口进入进流孔221，降低进流道22内由于介质孔道的变小引发的流体波动和压力急剧增加。
在本发明一种优选的实施方式中，所述第二压腔21为环形腔体，位于竖向出流道231的外围。环向腔体设计，对上膜片周向施力，相较于单侧施力，上膜片受力更为均匀，延长上膜片的使用寿命。
在本发明一种优选的实施方式中，所述竖向出流道231位于阀体2的轴心。进一步地，所述竖向出流道231的横截面积在满足流量要求下尽量小，同样能够使得上膜片3向下的作用力更加大于向上的作用力，利于防泄漏。
在本发明一种优选的实施方式中，所述第二压腔21内设置有下膜片4，所述下膜片4的厚度小于第二压腔21的高度。进一步地，所述下膜片4的厚度为第二压腔21高度的1/4～3/4。下膜片在上膜片下方，能够在密封时对上膜片起到支撑的作用，降低上膜片的变形，这样，上膜片上下表面通过较小的压力差产生较小的形变，即可实施密封。
在本发明一种优选的实施方式中，所述逆流槽233内安装有弹性圆柱销5，所述弹性圆柱销5的上端进入第一压腔11。
进一步地，所述弹性圆柱销5的外壁紧贴第一压腔11的内壁，此时弹性圆柱销5对逆流槽233起定位作用。
本发明中上述技术方案，实现了单向阀在较低压力范围下很好的密封性，从而使低压介质在阀内只能单向的流通，解决了目前常规式单向阀在低压下难开启和易泄漏的问题。
以上结合具体实施方式和范例性实例对本发明进行了详细说明，不过这些说明并不能理解为对本发明的限制。本领域技术人员理解，在不偏离本发明精神和范围的情况下，可以对本发明技术方案及其实施方式进行多种等价替换、修饰或改进，这些均落入本发明的范围内。本发明的保护范围以所附权利要求为准。
本发明说明书中未作详细描述的内容属本领域技术人员的公知技术。

Claims (10)

  1. 一种用于低压工况的单向阀，其特征在于，包括：阀盖(1)、阀体(2)和上膜片(3)，其中，上膜片(3)铺设于阀盖(1)和阀体(2)之间，通过紧固螺纹连接件将三者紧密连接；
    所述阀盖(1)的下表面开设第一压腔(11)，用于容纳逆向介质；
    所述阀体(2)的内部开设有进流道(22)和出流道，上表面加工有第二压腔(21)，所述进流道(22)的内壁至第二压腔(21)的底面加工有进流孔(221)，介质由进流道(22)经进流孔(221)进入第二压腔(21)，对上膜片(3)施加向上的压力，使得上膜片(3)向阀盖(1)的方向移动；
    所述出流道包括竖向出流道(231)和水平出流道(232)，竖向出流道(231)的进口端位于阀体(2)的上表面，出口端与水平出流道(232)连通，第二压腔(21)与竖向出流道(231)的进口端均落入第一压腔(11)的覆盖范围内，在上膜片(3)向阀盖(1)的方向移动时，进流孔(221)与竖向出流道(231)连通，介质通过竖向出流道(231)、水平出流道(232)后流出单向阀；
    所述水平出流道(232)的侧壁上加工有连通至第一压腔(11)的逆流槽(233)，进入水平出流道(232)的逆向介质一部分通过逆流槽(233)进入第一压腔(11)，另一部分进入竖向出流道(231)，介质与上膜片(3)的上表面的接触面积大于与上膜片(3)的下表面的接触面积，通过上膜片(3)上下表面的压力差进行逆向密封。
  2. 根据权利要求1所述的单向阀，其特征在于，所述阀盖(1)和阀体(2)之间通过水纹线密封。
  3. 根据权利要求1所述的单向阀，其特征在于，所述上膜片(3)可以为聚四氟乙烯、氟化乙烯丙烯共聚物、氟橡胶夹布和金属材质制成的膜片。
  4. 根据权利要求1所述的单向阀，其特征在于，所述第一压腔(11)的高度在上膜片(3)同方向上的最大弹性形变范围内。
  5. 根据权利要求1所述的单向阀，其特征在于，所述进流孔(221)为斜 向流道，进流孔(221)在进流道(22)内壁的入口靠前，在第二压腔(21)底面的出口靠后。
  6. 根据权利要求1所述的单向阀，其特征在于，所述竖向出流道(231)位于阀体(2)的轴心。
  7. 根据权利要求1所述的单向阀，其特征在于，所述第二压腔(21)为环形腔体，位于竖向出流道(231)的外围。
  8. 根据权利要求1所述的单向阀，其特征在于，所述第二压腔(21)内设置有下膜片(4)，所述下膜片(4)的厚度小于第二压腔(21)的高度；优选地，所述下膜片(4)的厚度为第二压腔(21)高度的1/4～3/4。
  9. 根据权利要求1所述的单向阀，其特征在于，所述逆流槽(233)内安装有弹性圆柱销(5)，所述弹性圆柱销(5)的上端进入第一压腔(11)。
  10. 根据权利要求9所述的单向阀，其特征在于，所述弹性圆柱销(5)的外壁紧贴第一压腔(11)的内壁。
PCT/CN2021/117737 2020-10-15 2021-09-10 一种用于低压工况的单向阀 WO2022078135A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US18/028,077 US20240026985A1 (en) 2020-10-15 2021-09-10 Check valve for low pressure operating conditions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011104363.1A CN112377648A (zh) 2020-10-15 2020-10-15 一种用于低压工况的单向阀
CN202011104363.1 2020-10-15

Publications (1)

Publication Number Publication Date
WO2022078135A1 true WO2022078135A1 (zh) 2022-04-21

Family

ID=74581568

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/117737 WO2022078135A1 (zh) 2020-10-15 2021-09-10 一种用于低压工况的单向阀

Country Status (3)

Country Link
US (1) US20240026985A1 (zh)
CN (1) CN112377648A (zh)
WO (1) WO2022078135A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112377648A (zh) * 2020-10-15 2021-02-19 北京航天石化技术装备工程有限公司 一种用于低压工况的单向阀
CN112870511A (zh) * 2021-03-23 2021-06-01 威海华菱光电股份有限公司 呼吸装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008089910A1 (de) * 2007-01-27 2008-07-31 Ixetic Hückeswagen Gmbh Ventileinrichtung für ein unterdruck-versorgungssystem
US7422030B2 (en) * 2004-07-15 2008-09-09 Cherne Industries Incorporated Air admittance valve assembly
CN103896368A (zh) * 2012-12-26 2014-07-02 刘爱东 无电低压可断水纯水机
CN204403466U (zh) * 2015-01-16 2015-06-17 刘远征 低压逆止阀
WO2018033453A1 (en) * 2016-08-17 2018-02-22 W.L. Gore & Associates Gmbh Check valve
CN207513975U (zh) * 2017-11-14 2018-06-19 瑞立集团瑞安汽车零部件有限公司 一种单向膜片式溢流阀
CN111536256A (zh) * 2020-06-11 2020-08-14 中山市佐恩斯电子科技有限公司 一种多功能阀门组件结构
CN112377648A (zh) * 2020-10-15 2021-02-19 北京航天石化技术装备工程有限公司 一种用于低压工况的单向阀

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5386848A (en) * 1994-02-22 1995-02-07 Alliedsignal Inc. Pneumatic check valve and method for making same
JP5494658B2 (ja) * 2009-05-25 2014-05-21 株式会社村田製作所 バルブ、流体装置及び流体供給装置
JP5185475B2 (ja) * 2011-04-11 2013-04-17 株式会社村田製作所 バルブ、流体制御装置
CN109707878B (zh) * 2019-02-26 2020-04-21 哈尔滨工业大学 一种基于响应膜片的单向阀及单向变压阀

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7422030B2 (en) * 2004-07-15 2008-09-09 Cherne Industries Incorporated Air admittance valve assembly
WO2008089910A1 (de) * 2007-01-27 2008-07-31 Ixetic Hückeswagen Gmbh Ventileinrichtung für ein unterdruck-versorgungssystem
CN103896368A (zh) * 2012-12-26 2014-07-02 刘爱东 无电低压可断水纯水机
CN204403466U (zh) * 2015-01-16 2015-06-17 刘远征 低压逆止阀
WO2018033453A1 (en) * 2016-08-17 2018-02-22 W.L. Gore & Associates Gmbh Check valve
CN207513975U (zh) * 2017-11-14 2018-06-19 瑞立集团瑞安汽车零部件有限公司 一种单向膜片式溢流阀
CN111536256A (zh) * 2020-06-11 2020-08-14 中山市佐恩斯电子科技有限公司 一种多功能阀门组件结构
CN112377648A (zh) * 2020-10-15 2021-02-19 北京航天石化技术装备工程有限公司 一种用于低压工况的单向阀

Also Published As

Publication number Publication date
US20240026985A1 (en) 2024-01-25
CN112377648A (zh) 2021-02-19

Similar Documents

Publication Publication Date Title
WO2022078135A1 (zh) 一种用于低压工况的单向阀
CN216201346U (zh) 一种具有高密封性的暖气阀
RU2810328C1 (ru) Обратный клапан для условий работы при низком давлении
CN211315121U (zh) 一种带辅助定位机构的升降式止回阀
CN101943280A (zh) 新型y型内螺纹止回阀
CN209876018U (zh) 一种先导隔膜式减压阀
WO2019205989A1 (zh) 一种电磁阀
CN207864689U (zh) 一种三通气动薄膜调节阀
CN107061786B (zh) 一种耐腐蚀隔膜阀
CN220354553U (zh) 低阻力倒流防止器
CN205136688U (zh) 一种低阻力倒流防止器
CN216692233U (zh) 整体式球阀
CN215410397U (zh) 一种污水处理自动调压阀
CN213088819U (zh) 一种防堵塞稳压阀
CN220416332U (zh) 一种防阀芯粘连的单向压力控制阀
CN220870170U (zh) 排气阀
CN219493038U (zh) 一种燃气流量调节阀的阀口垫密封结构
CN216643212U (zh) 一种阀门壳体结构
CN210240691U (zh) 一种燃气采暖热水炉的进水阀
CN211599659U (zh) 一种带呼吸孔的水力控制阀
CN220551518U (zh) 一种低压启动大流量耐高温直动放水电磁阀
CN215110899U (zh) 一种电磁阀膜片组件
CN214662116U (zh) 一种抗拉伸性强的中线对夹橡胶阀座
CN219692294U (zh) 一种截止阀
CN219639449U (zh) 一种双重密封效果的抗冲刷截止阀

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21879181

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 18028077

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21879181

Country of ref document: EP

Kind code of ref document: A1