WO2023011475A1 - 一种用于医用真空负压机的单向阀系统 - Google Patents

一种用于医用真空负压机的单向阀系统 Download PDF

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WO2023011475A1
WO2023011475A1 PCT/CN2022/109712 CN2022109712W WO2023011475A1 WO 2023011475 A1 WO2023011475 A1 WO 2023011475A1 CN 2022109712 W CN2022109712 W CN 2022109712W WO 2023011475 A1 WO2023011475 A1 WO 2023011475A1
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valve seat
way valve
air
umbrella
negative pressure
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PCT/CN2022/109712
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English (en)
French (fr)
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徐明泉
唐海涛
丁文龙
冯路横
刘庆城
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江苏苏中药业集团医疗器械有限公司
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Publication of WO2023011475A1 publication Critical patent/WO2023011475A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/223—Multiway valves

Definitions

  • the invention belongs to the technical field of a one-way valve system, and in particular relates to a one-way valve system for a medical vacuum negative pressure machine.
  • negative pressure wound therapy management as a closed negative pressure therapy technology, has been widely used in various local tissue wound healing treatments.
  • the application of negative pressure wound therapy management technology ensures the formation of a negative pressure environment on the tissue wound surface and promotes wound healing.
  • Chinese patent application CN112943986A discloses a medical one-way valve, mainly through the deformation of the elastic seal to realize the conduction of the upper and lower chambers, and the seal is prone to aging, resulting in air leakage and the like.
  • Chinese patent CN213145482U discloses a medical springless one-way valve.
  • the one-way valve is mainly through the deformation and movement of the elastic valve core to realize the conduction of the valve body. It also has the elastic valve core that is prone to aging, resulting in air leakage or Problems such as restricted movement of the spool.
  • the airtightness of the one-way valve system is not high in the actual use of the commonly used medical negative pressure machines on the market.
  • the present invention provides a one-way valve system for medical vacuum negative pressure machines. Small, can effectively improve the airtightness of the negative pressure pump in the medical vacuum negative pressure machine, thereby reducing the power consumption of the medical vacuum negative pressure machine, improving control accuracy, reducing noise, and bringing a better user experience.
  • a one-way valve system for a vacuum negative pressure machine including a one-way valve, an adapter, a gas nozzle and a negative pressure pump, the one-way valve is built in the gas nozzle and is close to its gas outlet end, wherein the The valve seat and the air nozzle, the air outlet of the adapter and the air inlet of the air nozzle, the air inlet of the negative pressure pump and the air outlet of the air nozzle are assembled and connected by interference fit.
  • the interference fit has a compact structure, is easy to install, and has good airtightness, which is especially suitable for the directional flow of gas; the uniformly distributed flow hole design makes the air pressure of each gas channel the same, ensuring the opening and closing process of the one-way valve Respond in a timely and stable manner.
  • described gas nozzle is three-way nozzle, comprises three-way nozzle inlet (31), three-way nozzle collection port (32) and three-way nozzle gas outlet (33), wherein, three-way nozzle collection port (32) adopt the interference fit assembly mode to be connected with the air pressure sensor (4).
  • the inner diameter of the collecting port and the air outlet of the air nozzle is smaller than the inner diameter of the air inlet.
  • the material of the adapter, the one-way valve, the negative pressure pump, the air pressure sensor and the air nozzle in the interference fit position of the air nozzle is elastic material, preferably silica gel or rubber; the preferred shape is circular. This design can make full use of the elastic characteristics of the material to further improve the airtightness of the component interface.
  • the material of the adapter and the one-way valve is elastic material, preferably plastic PP material.
  • any interference fit part inside the gas nozzle is provided with a protruding sealing gasket.
  • any other interference fit part inside the gas nozzle is provided with Protruding sealing gasket;
  • the sealing gasket is integrated with the gas nozzle, and its material is elastic material, preferably silica gel or rubber;
  • the shape of the sealing gasket is consistent with the shape of the interference fit part of the gas nozzle, preferably O-shaped;
  • the number of sealing gaskets is 3 or 5.
  • the inner diameter of the air inlet of the air nozzle is smaller than the outer diameter of the air outlet of the adapter; the inner diameter of the air outlet of the air nozzle is smaller than the outer diameter of the air inlet of the negative pressure pump; the inner diameter of the collection port of the air nozzle The size is smaller than the outer diameter of the air pressure sensor collection port; the outer diameter of the check valve seat is larger than the inner diameter of the air inlet and the air outlet of the air nozzle.
  • the adapter is a Luer adapter (1), comprising a Luer adapter (11), a joint stopper (12) and a Luer adapter air outlet (13), and the joint stopper (12) is arranged on the Luer Between the joint (11) and the air outlet (13) of the Luer adapter.
  • the end surface of the valve seat of the one-way valve is provided with evenly distributed flow holes, and the distance between the outer edge of the flow holes and the inner wall of the valve seat end surface is not less than the distance between the edge of the umbrella door and the inner wall of the valve seat end surface.
  • the assembly method of the valve and the valve seat of the one-way valve is an interference fit.
  • the structure of the one-way valve (7) is a combined structure of an umbrella valve (72) and a valve seat (71), and the valve faces one end of the negative pressure pump; the Shore hardness of the umbrella valve is preferred At 40 ⁇ 5HD.
  • the valve seat (71) includes a central hole (710) passing through the end surface of the valve seat and flow holes (711) uniformly distributed on the end surface of the valve seat;
  • the umbrella valve (72) includes an umbrella handle (721), and a set The umbrella knot (722) in the middle of the umbrella handle (721) and the umbrella mouth (723) at the top, wherein the umbrella handle (721) and the umbrella knot (722) pass through the central hole (710) and are connected to the valve seat (71),
  • the outer diameter of the umbrella knot (722) is larger than the aperture size of the central hole (710), the umbrella knot (722) and the central hole (710) are in the form of an interference fit, and the umbrella mouth (723) is located relative to the umbrella knot in the central hole ( 710) and can expand and close under pressure.
  • the expanded maximum outer diameter of the umbrella mouth (723) is smaller than the inner diameter of the valve seat (71); the umbrella valve flow hole (711) can be completely covered after the umbrella mouth (723) is expanded; the top surface of the umbrella mouth (723) faces the negative
  • the direction of the pressure pump preferably, the number of flow holes is an even number.
  • the umbrella mouth is in contact with the bottom of the umbrella valve seat in the closed state and covers all the flow holes of the umbrella valve, and is out of contact with the bottom of the umbrella valve seat in the expanded state and exposes all the flow holes of the umbrella valve.
  • the structure of the one-way valve is a combined structure of a diaphragm and a valve seat.
  • the one-way valve (2) includes a diaphragm (22), a valve seat composed of a front valve seat (21) and a rear valve seat (23), and the diaphragm (22), the rear valve seat (23) and the front valve seat
  • the valve seats (21) are respectively connected by means of an interference fit assembly.
  • the bottom of the front valve seat (21) is provided with an exhaust hole (210), and the center of the bottom end surface of the rear valve seat (23) is provided with a raised portion facing the direction of the front valve seat, and its end surface is provided with evenly distributed flow holes ( 230).
  • the diaphragm is in the shape of a cylinder with one end sealed; further preferably, its Shore hardness is 30 ⁇ 5HD, and its wall thickness is 0.15 ⁇ 0.05mm.
  • the diaphragm (22) is located in the internal space where the front valve seat (21) is connected to the rear valve seat (23), and can move under pressure; the inner diameter of the rear valve seat (23) is smaller than the front valve seat (23). 21), the inner diameter of the diaphragm (22) is smaller than the outer diameter of the front seat (21) and smaller than the inner diameter of the rear seat (23), the front seat (21) is smaller than the seat (23) Away from the direction of the negative pressure pump, there is a gap between the interference fit parts of the rear valve seat (23) and the front valve seat (21) and the raised part of the rear valve seat (23).
  • the diaphragm sheet When the diaphragm sheet contacts with the bottom of the front valve seat, it can prevent gas from entering the diaphragm valve flow hole through the vent hole, and when it contacts the bottom of the rear valve seat, the gas coming in from the vent hole can pass through the diaphragm valve flow hole.
  • the negative pressure pump (5) comprises a negative pressure pump air inlet (51) and a negative pressure pump air outlet (52), and the negative pressure pump air outlet (52) is connected with a duckbill valve (6).
  • the setting of the duckbill valve can further reduce the gas leakage of the system.
  • the present invention has the following advantages:
  • the invention is applied to the design of the one-way valve system of the medical vacuum negative pressure machine, especially by using the interference fit method of the assembly size of the components and the uniform distribution design of the micro flow holes, which can significantly improve the airtightness.
  • the suction state of the negative pressure pump can quickly reach the predetermined upper limit of negative pressure, and at the same time maintain a certain negative pressure environment for a long time, thereby reducing the overall working noise of the negative pressure machine.
  • the assembly is simple and the cost is reduced.
  • the structure of the one-way valve system adopts the component assembly method, which reduces the complexity of the overall assembly, and is also conducive to the division of labor in the assembly line, which improves the assembly efficiency and reduces the production cost.
  • Fig. 1 is a schematic structural diagram of Embodiment 1 of the present invention.
  • Fig. 2 is a schematic diagram of the elastic characteristic effect of the silicone material of the present invention.
  • Fig. 3 is a schematic diagram of the combined structure of the umbrella valve of the present invention.
  • Fig. 4 is a schematic diagram of the working principle of the umbrella valve of the present invention.
  • Fig. 5 is a schematic structural diagram of Embodiment 2 of the present invention.
  • Fig. 6 is a schematic diagram of the combined structure of the diaphragm valve of the present invention.
  • Fig. 7 is a schematic diagram of the working principle of the diaphragm valve of the present invention.
  • FIG. 1 it is a one-way valve system combined with an umbrella valve 72 and a valve seat 71 applied to a medical vacuum negative pressure machine.
  • the Luer adapter 1 can only be opened through the gas channel of the three-way air nozzle 3 and then to the air outlet 52 of the negative pressure pump.
  • the umbrella valve 72 and the umbrella valve seat 71 are combined to form the structure of the umbrella valve 7, and the assembly method of the umbrella valve 7 and the three-ventilator 3 is an interference fit.
  • the outer diameter of the umbrella valve seat 71 is larger than the inner diameter of the three-way nozzle 3, and the difference between the two sizes is within the range of 0.4 ⁇ 0.1mm; the umbrella valve 7 is embedded in the three-way nozzle 3 and is close to the position of the outlet 33 of the three-way nozzle , can ensure that the airtightness of the contact area between the umbrella valve 7 and the three-way nozzle 3 is very good.
  • the assembly method among the Luer adapter 1 , the three-way vent 3 , and the air pressure sensor 4 is an interference fit.
  • the joint limit port 12 is tightly fixed with the Luer adapter 1 in the negative pressure machine shell, and at the same time ensures the concentricity of the three-vent nozzle 3 and the Luer adapter 1;
  • the air outlet 13 of the Luer adapter is made of plastic PP material, and its outer
  • the diameter size should be larger than the inner diameter of the air inlet 31 of the three-way air nozzle, and the difference between the two sizes is within 0.5 ⁇ 0.1mm; Within the range of 0.3 ⁇ 0.1mm; the inner diameter of the air outlet 33 of the three-way air nozzle is smaller than the outer diameter of the air inlet 51 of the negative pressure pump, and the difference between the two sizes is within the range of 0.8 ⁇ 0.1mm.
  • the contact area A between the air outlet 13 of the Luer adapter and the air inlet 31 of the three-way nozzle has three O-shaped silicone rings on the inside of the air inlet 31 of the three-way nozzle to fully seal the external gas leakage channel in the contact area;
  • In the contact area C with the air inlet 51 of the negative pressure pump there are three O-shaped silicone rings in the inner area of the air outlet 33 of the three-way nozzle, so that the gas in the contact area here does not leak to the outside.
  • the assembly structure of the umbrella valve 72 and the umbrella valve seat 71 is an interference fit.
  • the umbrella valve 72 passes through the central hole 710 of the umbrella valve seat 71 through the umbrella knot 722 on the umbrella handle 721.
  • the umbrella knot 722 has a circular structure and is integrally formed with the umbrella valve by a silicone mold.
  • the outer diameter of the umbrella knot 722 is larger than that of the umbrella valve.
  • the diameter of the central hole 710 of the valve seat 71 is within the range of 1 ⁇ 0.1mm.
  • the interference assembly of the umbrella knot 722 and the umbrella valve seat 71 ensures that the umbrella valve 721 and the central hole 710 are concentric and tightly fixed.
  • the maximum outer diameter of the umbrella mouth 723 should be smaller than the inner diameter of the umbrella valve seat 71, and both The size difference of the latter is controlled within the range of 0.3 ⁇ 0.05mm.
  • the umbrella valve 7 constituted by the umbrella valve 72 and the umbrella valve seat 71 has a one-way air flow function.
  • the pressure on one side of the umbrella mouth 723 of the umbrella valve 72 that is, P2
  • the pressure on one end of the umbrella top that is, P1
  • the umbrella valve 72 begins to open, so that the edge of the umbrella mouth 723 is separated from the end face of the umbrella valve seat 71, and the umbrella valve
  • There is a gap between the seat 71 and the umbrella valve 72 so that the gas passes through the flow hole 711 of the umbrella valve to form air circulation
  • the pressure on one side of the umbrella mouth 723, that is, P2 is lower than the pressure on one end of the umbrella top, that is, P1, the umbrella mouth 723 is deformed Shrink, the umbrella mouth 723 is close to the umbrella valve seat 71, and the umbrella valve flow hole 711 on the end face of the umbrella valve seat 71 is tightly covered, so that the gas cannot pass through the umbrella valve seat 71, thereby achieving the purpose of
  • the flow holes 711 are evenly distributed on the end surface of the umbrella valve seat 71 to allow the umbrella valve 72 to open and close stably under pressure.
  • a number of umbrella valve flow holes 711 uniformly distributed in a 360° plane are designed, and its number can be 4, 8, 12 scheme designs, and the best scheme is 4 or 8 , its function is to allow the umbrella valve 72 to be subject to the same air pressure in all directions during the gas circulation process.
  • the inner diameter can be
  • the only difference is the difference in the structure of the one-way valve, which is a diaphragm 22, a front valve seat 21, and a rear valve seat 23 applied to a medical vacuum negative pressure machine.
  • the combined one-way valve structure system is designed so that only when the negative pressure pump 5 is working, the gas passage from the Luer adapter 1 through the three-way air nozzle 3 to the negative pressure pump outlet 52 can be opened.
  • the combination of the diaphragm 22 , the rear valve seat 23 and the front valve seat 21 is an interference fit.
  • the front valve seat 21 and the rear valve seat 23 form a cylindrical area with a diameter of 6.5 mm and a depth of 0.8 mm.
  • a diaphragm 22 is embedded in the cylindrical area.
  • the diaphragm 22 is a cylinder with a height of 0.5 mm and an inner diameter of 6.5 mm.
  • the inner diameter of the rear valve seat 23 is larger than the outer diameter of the front valve seat 21, and the difference between the two sizes is within the range of 0.5 ⁇ 0.1 mm; the inner diameter of the diaphragm 22 is larger than the outer diameter of the front valve seat 21, And the size difference between the two is within the range of 0.2 ⁇ 0.05mm; the outer diameter of the diaphragm valve 2 is larger than the inner diameter of the three-way nozzle 3, and the difference between the two sizes is 0.8 ⁇ 0.1mm; such a size design makes the two assembly methods: The interference fit ensures airtightness.
  • the diaphragm valve 2 composed of the diaphragm 22 , the front valve seat 21 and the rear valve seat 23 has the function of one-way air circulation.
  • the pressure on the front end of the diaphragm 22, that is, P3 is greater than the pressure on the rear end, that is, P4, the diaphragm 22 moves toward the rear valve seat 23 under the action of pressure, so that a gap is formed between the front valve seat 21 and the inner side of the three-way valve 3.
  • the gas and the flow hole 230 of the diaphragm valve on the end face of the rear valve seat 23 form an air flow.
  • a cylindrical protrusion 231 with a diameter of 2.0 ⁇ 0.05 mm and a height of 1.0 mm is designed at the center of the end face of the rear valve seat 23 to ensure that the diaphragm 22 does not
  • the membrane valve flow hole 230 will be blocked; when the pressure on the front end of the diaphragm 22, that is, P3, is lower than the pressure on the rear end, that is, P4, because the diaphragm 22 and the front valve seat 21 are assembled with an interference fit, the diaphragm 22 Under the action of pressure, the front valve seat 21 is moved to cover the exhaust hole 210 tightly, so that the gas cannot pass through, thereby achieving the effect of a one-way valve.
  • the flow holes are evenly designed on the end surface of the rear valve seat 23 to allow the diaphragm 22 to move stably under pressure.
  • the material of the diaphragm needs to be silica gel or rubber, the Shore hardness is 30HD, the thickness is 0.15 ⁇ 0.05mm, and the height Designed in a cylindrical structure with a diameter of 0.5mm and a diameter of 6.5mm.
  • a check valve system applied to a medical vacuum negative pressure machine in order to better control the gas leakage of the system, a valve can be installed at the negative pressure pump outlet 52 of the negative pressure pump 5
  • Duckbill valve 6 duckbill valve 6 is also a kind of one-way valve structure, when negative pressure pump 5 works, is combined with negative pressure pump air outlet 52 to be normal gas flow; When negative pressure pump 5 is not working, duckbill valve 6 will block the gas channel that the negative pressure pump air outlet 52 communicates with the outside world. At the same time, the combined structure of the duckbill valve 6 and the air outlet 52 of the negative pressure pump will increase the power consumption of the negative pressure pump 5 .

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
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  • Veterinary Medicine (AREA)
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Abstract

一种用于医用真空负压机的单向阀系统，单向阀系统包括依次连接的转接头（1）、单向阀（2,7）、气嘴（3）和负压泵（5），转接头（1）与气嘴（3）、单向阀（2,7）与气嘴（3）、气嘴（3）和负压泵（5）的装配方式均采用过盈配合形式，单向阀（2,7）内部为过盈配合结构，并且端面设有均匀分布的流量孔（230,711）。单向阀系统能够实现空气只能单向流通，同时对外气体泄露量很小，能够有效提升单向阀系统气密性，确保整个医用真空负压机系统的气密性，从而降低医用真空负压机的功耗、提升控制精度、降低噪音，带来更好的用户体验。

Description

一种用于医用真空负压机的单向阀系统 技术领域
本发明属于单向阀系统技术领域，具体涉及一种用于医用真空负压机的单向阀系统。
背景技术
近年来，负压伤口治疗管理作为一种封闭式负压治疗技术，广泛应用于各类局部组织伤口愈合治疗，负压伤口治疗管理技术的应用保证组织伤口表面形成负压环境，促进伤口愈合。
中国专利申请CN112943986A公开了一种医用单向阀，主要是通过弹性密封件的形变，实现上下腔体的导通，其密封件容易发生老化，从而导致漏气等。中国专利CN213145482U公开了一种医用无簧单向阀，该单向阀主要是通过弹性阀芯的形变和移动，实现阀体的导通，其也存在弹性阀芯容易发生老化，导致漏气或者阀芯移动受限等问题。市面常用的医用负压机在实际使用过程中单向阀系统气密性不高，在负压伤口治疗过程中存在以下四方面问题：1、负压泵需要间歇性的启动抽气造成机器的功耗较大；2、负压压力值控制精度不高、无法实现精细化治疗；3、反复启动设备出现噪音较大，影响患者休息等问题；4、反复启动设备影响负压泵和电池使用寿命。
发明内容
发明目的：针对现有技术存在的问题，本发明提供了一种用于医用真空负压机的单向阀系统，该单向阀系统能够实现空气只能单向流通，同时对外气体泄露量很小，能够有效提升医用真空负压机中负压泵的气密性，从而降低医用真空负压机的功耗、提升控制精度、降低噪音，带来更好的用户体验。
技术方案：为了达到上述发明目的，本发明所采用的技术方案如下：
一种用于真空负压机的单向阀系统，包括单向阀、转接头、气嘴和负压泵，单向阀内置于气嘴内且靠近其出气口端，其中，单向阀的阀座与气嘴、转接头的出气口与气嘴的进气口、负压泵的进气口与气嘴的出气口通过过盈配合方式装配连接。
所述过盈配合，结构紧凑，便于安装，且气密性好，特别适用于气体的定向流通；所述均匀分布的流量孔设计使得各个气体通道气压相同，保证了单向阀开启和闭合过程及时稳定地响应。
作为优选方案或者改进方案：
还包括气压传感器，所述气嘴为三通气嘴，包括三通气嘴进气口(31)、三通气嘴采集口(32)和三通气嘴出气口(33)，其中，三通气嘴采集口(32)采用过盈配合装配方式与气压传感器(4)连接。
所述气嘴的采集口和出气口的内径尺寸小于进气口的内径尺寸。
所述转接头、单向阀、负压泵、气压传感器与气嘴的过盈配合部位的气嘴的材质为弹性材料，优选为硅胶或橡胶；优选形状为圆形。该设计能够充分利用材质的弹性特征，进一步提高组件接口处气密性。
所述转接头、单向阀的材质为弹性材料，优选为塑胶PP材质。
气嘴内部的任一过盈配合部位设置有突出的密封垫圈，优选地，除单向阀的阀座与气嘴连接的过盈配合部位外，气嘴内部其他任一过盈配合部位设置有突出的密封垫圈；所述密封垫圈与气嘴为一体结构，其材质为弹性材料，优选为硅胶或橡胶；所述密封垫的形状与气嘴的过盈配合部位形状一致，优选为O型；优选密封垫圈的个数为3个或5个。
所述气嘴进气口的内径尺寸小于转接头出气口的外径尺寸；所述气嘴的出气口内径尺寸小于负压泵进气口的外径尺寸；所述气嘴采集口的口内径尺寸小于气压传感器采集口的外径尺寸；所述单向阀阀座的外径尺寸大于气嘴进气口和出气口内径尺寸。上述尺寸的分配能够实现组件的过盈配合，并且最大程度优化过盈配合结构，保证接口处的气密性和安装便捷性。
所述转接头为鲁尔转接头(1)，包括鲁尔接头(11)、接头限位口(12)和鲁尔转接头出气口(13)，接头限位口(12)设置在鲁尔接头(11)和鲁尔转接头出气口(13)中间。
所述单向阀的阀座的端面设有均匀分布的流量孔，所述流量孔外沿与阀座端面内壁的距离不小于伞门边沿与阀座端面内壁的距离。
所述单向阀的阀门与阀座的装配方式为过盈配合形式。
作为一种实施方案，所述单向阀(7)的结构为伞形阀门(72)与阀座(71)的组合结构，所述阀门朝向负压泵一端；优选伞形阀门的邵氏硬度在40±5HD。
所述阀座(71)包括穿过阀座端面的中心孔(710)和均匀分布在阀座端面的流量 孔(711)；所述伞形阀门(72)包括伞柄(721)、以及设置在伞柄(721)中部的伞结(722)和顶部的伞口(723)，其中，伞柄(721)和伞结(722)穿过中心孔(710)与阀座(71)连接，伞结(722)的外径尺寸大于中心孔(710)的孔径尺寸，伞结(722)与中心孔(710)为过盈配合形式，伞口(723)位于相对于伞结位于中心孔(710)的另一侧，并且在压力作用下能够展开和闭合。
伞口(723)的展开最大外径尺寸小于阀座(71)的内径尺寸；伞口(723)的展开后可将伞阀流量孔(711)完全覆盖；伞口(723)顶面朝向负压泵方向；优选所述的流量孔个数为偶数个。
伞口，闭合状态下与伞阀阀座的底部接触，并且覆盖住所有的伞阀流量孔，展开状态下与伞阀阀座的底部脱离接触，并且暴露出所有的伞阀流量孔。
作为另一种实施方案，所述单向阀的结构为隔膜片与阀座的组合结构。
所述单向阀(2)包括隔膜片(22)、由前阀座(21)与后阀座(23)构成的阀座，所述隔膜片(22)、后阀座(23)与前阀座(21)分别通过过盈配合的装配方式连接。
前阀座(21)的底部设有排气孔(210)，后阀座(23)的底部端面中心朝向前阀座方向上设有一凸起部位，且其端面设有均匀分布的流量孔(230)。
所述隔膜片为一端封口的圆筒形状；进一步优选其邵氏硬度在30±5HD，壁厚0.15±0.05mm。
所述隔膜片(22)位于前阀座(21)与后阀座(23)连接的内部空间中，在压力作用下能够移动；所述后阀座(23)的内径尺寸小于前阀座(21)的外径尺寸，隔膜片(22)的内径尺寸小于前阀座(21)的外径尺寸且小于后阀座(23)的内径尺寸，前阀座(21)较阀座(23)远离负压泵方向，后阀座(23)与前阀座(21)的过盈配合部位与后阀座(23)的凸起部位之间有空隙间距。
隔膜片与前阀座的底部接触时，能阻止气体通过排气孔进入隔膜阀流量孔，与后阀座的底部接触时，能使排气孔进来的气体通过隔膜阀流量孔。
所述负压泵(5)，包括负压泵进气口(51)和负压泵出气口(52)，负压泵出气口(52)连接有鸭嘴阀(6)。鸭嘴阀的设置，能够使系统气体泄露量进一步降低。
有益效果：与现有技术相比，本发明具有以下优势：
(1)提高医用真空负压机的气密性。本发明应用于医用真空负压机的单向阀系统设计，特别是利用组件装配尺寸的过盈配合方式和微型流量孔的均匀性分布设计，能够显著提高气密性。
(2)通过该单向阀的气压均匀。通过设置均匀分布的流量孔以及设置隔膜片与阀座的组合结构、伞形阀门与阀座的组合结构，保证了通过该单向阀后的气压均匀。
(3)电池续航能力强。使用该单向阀系统后，气密性得到提高，负压泵抽气频率降低，同时增加了维持预期负压环境的时间，降低了功耗，使得电池的使用寿命进一步得到增加。
(4)降低噪音。由于该单向阀系统结构紧凑，设计合理，负压泵抽气状态能很快达到预定的负压上限值，同时长时间保持一定负压环境，从而使得负压机整体工作噪声降低。
(5)装配简单，降低成本。该单向阀系统结构采用部件装配式组合方式，降低了整体装配复杂度，同时也有利于流水线分工合作，提高了装配效率，降低了生产成本。
附图说明
图1本发明实施例1结构示意图。
图2本发明硅胶材料弹性特征效果示意图。
图3本发明伞阀组合结构示意图。
图4本发明伞阀工作原理示意图。
图5本发明实施例2结构示意图。
图6本发明隔膜阀组合结构示意图。
图7本发明隔膜阀工作原理示意图。
具体实施方式
下面将结合实施例对本发明作进一步说明，以便全面解本发明。
实施例1
如图1所示，为一种应用于医用真空负压机的伞阀72和阀座71组合的单向阀系统，该单向阀系统设计使得只有在负压泵5工作的情况下，从鲁尔转接头1经过三通气嘴3再到负压泵出气口52的气体通道才能打开。
如图1和图3所示，伞阀72和伞阀阀座71组合成伞阀门7结构，伞阀门7与三通气嘴3的装配方式为过盈配合。伞阀阀座71的外径尺寸大于三通气嘴3内径尺寸，且两者尺寸 相差在0.4±0.1mm范围内；伞阀门7嵌入到三通气嘴3内并靠近三通气嘴出气口33的位置，可以保证伞阀门7和三通气嘴3接触区域的气密性很好。
如图1所示，鲁尔转接头1、三通气嘴3、气压传感器4之间组合装配方式为过盈配合。接头限位口12为鲁尔转接头1紧密固定与负压机外壳中，同时确保了三通气嘴3、鲁尔转接头1同心性；鲁尔转接头出气口13为塑胶PP材质，其外径尺寸要大于三通气嘴进气口31内径尺寸且两者尺寸差在0.5±0.1mm范围内；三通气嘴采集口32内径尺寸要小于气压传感器采集端41外径尺寸，两者尺寸差在0.3±0.1mm范围内；三通气嘴出气口33内径尺寸小于负压泵进气口51的外径尺寸，两者尺寸差在0.8±0.1mm范围内。
如图2所示，鲁尔转接头1与三通气嘴3之间、气压传感器4与三通气嘴3之间、三通气嘴3与负压泵5之间为O型硅胶圈紧密配合。鲁尔转接头出气口13与三通气嘴进气口31接触区域A，在三通气嘴进气口31内侧有三道O型硅胶圈，实现此处接触区域对外气体泄露通道充分封闭；在三通气嘴采集口32与气压传感器采集端41的接触区域C内，三通气嘴采集口32内侧区域有三道O型硅胶圈，实现此处接触区域气压能够充分采集且封闭；在三通气嘴出气口33与负压泵进气口51的接触区域C内，在三通气嘴出气口33内侧区域有三道O型硅胶圈，实现此处接触区域气体对外不泄露。
如图3所示，伞阀72与伞阀阀座71的组合装配结构为过盈装配。伞阀72通过伞柄721上的伞结722穿过伞阀阀座71的中心孔710，伞结722为圆形结构，与伞阀为硅胶模具一体成型，伞结722的外径尺寸大于伞阀阀座71的中心孔710孔径尺寸，且两者尺寸相差在1±0.1mm范围内。此处伞结722与伞阀阀座71的过盈装配方式，保证了伞阀721与中心孔710同心且紧密固定。
进一步地说，如图3所示，为了让伞口在受到空气压力过程中能顺利快速地打开和闭合，需要伞口723展开最大外径尺寸要小于伞阀阀座71的内径尺寸，且两者的尺寸差控制在0.3±0.05mm范围内。
如图4所示，伞阀72和伞阀阀座71构成的伞阀门7具备单向空气流通的。当伞阀72的伞口723一面受到的压力即P2大于伞顶一端受到的压力即P1时，伞阀72开始张开，使得伞口723边缘与伞阀阀座71端面分离，在伞阀阀座71和伞阀72之间产生间隙，从而使得气体通过伞阀流量孔711，形成空气流通；当伞口723一面受到的压力即P2小于伞顶一端受到的压力即P1时，伞口723变形收缩，伞口723紧贴伞阀阀座71，将伞阀阀座71端面的伞阀流量孔711严密覆盖，气体无法通过伞阀阀座71，从而达到单向阀目的。
如图3所示，在伞阀阀座71端面均匀分布流量孔711，是为了让伞阀72在受到压力作用下能够稳定地张开和闭合。在伞阀阀座71的端面设计若干数量在360°的平面内均匀分布的伞阀流量孔711，它的数目可以是4、8、12个的方案设计，最好方案是4个或8个，其作用是气体流通过程中，让伞阀72受到各个方向的气压力相同。比如当数目为4个时，其内径可以为
Figure PCTCN2022109712-appb-000001
实施例2
如图5所示，与实施例1基本相同，不同之处仅在于单向阀结构的不同，为一种应用于医用真空负压机的由隔膜片22、前阀座21、后阀座23组合而成的单向阀结构系统，该系统设计使得只有在负压泵5工作的情况下，从鲁尔转接头1经过三通气嘴3再到负压泵出气口52的气体通道才能打开。
如图6所示，隔膜片22、后阀座23和前阀座21之间组合的装配方式为过盈配合。前阀座21和后阀座23构成直径6.5mm，深度0.8mm的圆柱形区域，在该圆柱形区域内嵌入一个隔膜片22，隔膜片22为高度0.5mm，内径为6.5mm的圆筒形状，此处后阀座23的内径尺寸要大于前阀座21的外径尺寸，且两者尺寸相差在0.5±0.1mm范围内；隔膜片22的内径尺寸大于前阀座21的外径尺寸，且两者尺寸相差在0.2±0.05mm范围内；隔膜阀2的外径尺寸大于三通气嘴3的内径尺寸，且两者尺寸相差在0.8±0.1mm；这样的尺寸设计使得两者装配方式为过盈配合，保证了气密性。
如图7所示，隔膜片22、前阀座21、后阀座23组合而成的隔膜阀2具备单向空气流通的功能。当隔膜片22前端面受到的压力即P3大于后端面受到的压力即P4时，隔膜片22在压力作用下向后阀座23移动，从而使得前阀座21与三通气嘴3内侧产生间隙，从而使得气体与后阀座23端面隔膜阀流量孔230形成空气流通，同时后阀座23端面中心处设计一个直径2.0±0.05mm，高1.0mm的圆柱凸起231结构设计，保证隔膜片22不会将膜阀流量孔230堵住；当隔膜片22前端面受到的压力即P3小于后端面受到的压力即P4时，因为隔膜片22与前阀座21为过盈配合装配，使得隔膜片22在压力作用下向前阀座21移动并将其排气孔210严密覆盖，造成气体无法通过，从而达到单向阀作用。
如图6所示，在后阀座23端面均匀设计流量孔，是为了让隔膜片22在受到压力作用下能够稳定地移动。在后阀座23端面设计若干数量在360°的平面内均匀分布的隔膜阀流量孔230，它的数目可以是3、6、9个的方案，最好是3个或6个，其作用是气体流通过程中，让隔膜片22受到各个方向气压力相同。比如当数目为3个时，其内径可以为
Figure PCTCN2022109712-appb-000002
进一步地说，如图5所示，为了让隔膜片在受到空气压力过程中能顺利快速移动，需要隔膜片的材质特性为硅胶或橡胶，邵氏硬度在30HD，厚度在0.15±0.05mm，高度在0.5mm、直径为6.5mm的圆筒状结构设计。
如图1和图5所示，一种应用于医用真空负压机的单向阀系统，为了更好的控制系统气体泄漏量，可以在负压泵5的负压泵出气口52安装一种鸭嘴阀6，鸭嘴阀6也是一种单向阀结构，在负压泵5工作时，与负压泵出气口52组合为正常气体流通；当负压泵5不工作时，鸭嘴阀6将堵住负压泵出气口52与外界流通的气体通道。同时，鸭嘴阀6和负压泵出气口52组合结构，会增加负压泵5的功耗。

Claims (19)

  1. 一种用于真空负压机的单向阀系统，其特征在于，包括单向阀、转接头、气嘴和负压泵，单向阀内置于气嘴内且靠近其出气口端，其中，单向阀的阀座与气嘴、转接头的出气口与气嘴的进气口、负压泵的进气口与气嘴的出气口通过过盈配合方式装配连接。
  2. 根据权利要求1所述的单向阀系统，其特征在于，包括气压传感器，所述气嘴为三通气嘴，包括三通气嘴进气口(31)、三通气嘴采集口(32)和三通气嘴出气口(33)，其中，三通气嘴采集口(32)采用过盈配合装配方式与气压传感器(4)连接。
  3. 根据权利要求1-2任一项所述的单向阀系统，其特征在于，所述气嘴的采集口和出气口的内径尺寸小于进气口的内径尺寸。
  4. 根据权利要求1-2任一项所述的单向阀系统，其特征在于，所述转接头、单向阀、负压泵、气压传感器与气嘴的过盈配合部位的气嘴的材质为弹性材料，优选为硅胶或橡胶；优选形状为圆形。
  5. 根据权利要求1-2任一项所述的单向阀系统，其特征在于，所述转接头、单向阀的材质为弹性材料，优选为塑胶PP材质。
  6. 根据权利要求1-2任一项所述的单向阀系统，其特征在于，气嘴内部的任一过盈配合部位设置有突出的密封垫圈，优选地，除单向阀的阀座与气嘴连接的过盈配合部位外，气嘴内部其他任一过盈配合部位设置有突出的密封垫圈；所述密封垫圈与气嘴为一体结构，其材质为弹性材料，优选为硅胶或橡胶；所述密封垫的形状与气嘴的过盈配合部位形状一致，优选为O型；优选密封垫圈的个数为3个或5个。
  7. 根据权利要求1-2任一项所述的单向阀系统，其特征在于，所述气嘴进气口的内径尺寸小于转接头出气口的外径尺寸；所述气嘴的出气口内径尺寸小于负压泵进气口的外径尺寸；所述气嘴采集口的口内径尺寸小于气压传感器采集口的外径尺寸；所述单向阀阀座的外径尺寸大于气嘴进气口和出气口内径尺寸。
  8. 根据权利要求1-2任一项所述的单向阀系统，其特征在于，所述转接头为鲁尔转接头(1)，包括鲁尔接头(11)、接头限位口(12)和鲁尔转接头出气口(13)，接头限位口(12)设置在鲁尔接头(11)和鲁尔转接头出气口(13)中间。
  9. 根据权利要求1所述的单向阀系统，其特征在于，所述单向阀的阀座的端面设有均匀分布的流量孔，所述流量孔外沿与阀座端面内壁的距离不小于伞门边沿与阀座端面内壁的距离。
  10. 根据权利要求1-2任一项所述的单向阀系统，其特征在于，所述单向阀的阀门与阀座的装配方式为过盈配合形式。
  11. 根据权利要求1-2任一项所述的单向阀系统，其特征在于，所述单向阀(7)的结构为伞形阀门(72)与阀座(71)的组合结构，所述阀门朝向负压泵一端；优选伞形阀门的邵氏硬度在40±5HD。
  12. 根据权利要求11所述的单向阀系统，其特征在于，所述阀座(71)包括穿过阀座端面的中心孔(710)和均匀分布在阀座端面的流量孔(711)；所述伞形阀门(72)包括伞柄(721)、以及设置在伞柄(721)中部的伞结(722)和顶部的伞口(723)，其中，伞柄(721)和伞结(722)穿过中心孔(710)与阀座(71)连接，伞结(722)的外径尺寸大于中心孔(710)的孔径尺寸，伞结(722)与中心孔(710)为过盈配合形式，伞口(723)位于相对于伞结位于中心孔(710)的另一侧，并且在压力作用下能够展开和闭合。
  13. 根据权利要求12所述的单向阀系统，其特征在于，伞口(723)的展开最大外径尺寸小于阀座(71)的内径尺寸；伞口(723)的展开后可将伞阀流量孔(711)完全覆盖；伞口(723)顶面朝向负压泵方向；优选所述的流量孔个数为偶数个。
  14. 根据权利要求1-2任一项所述的单向阀系统，其特征在于，所述单向阀的结构为隔膜片与阀座的组合结构。
  15. 根据权利要求14所述的单向阀系统，其特征在于，所述单向阀(2)包括隔膜片(22)、由前阀座(21)与后阀座(23)构成的阀座，所述隔膜片(22)、后阀座(23)与前阀座(21)分别通过过盈配合的装配方式连接。
  16. 根据权利要求15所述的单向阀系统，其特征在于，前阀座(21)的底部设有排气孔(210)，后阀座(23)的底部端面中心朝向前阀座方向上设有一凸起部位，且其端面设有均匀分布的流量孔(230)。
  17. 根据权利要求15所述的单向阀系统，其特征在于，所述隔膜片为一端封口的圆筒形状；进一步优选其邵氏硬度在30±5HD，壁厚0.15±0.05mm。
  18. 根据权利要求17所述的单向阀系统，其特征在于，所述隔膜片(22)位于前阀座(21)与后阀座(23)连接的内部空间中，在压力作用下能够移动；所述后阀座(23)的内径尺寸小于前阀座(21)的外径尺寸，隔膜片(22)的内径尺寸小于前阀座(21)的外径尺寸且小于后阀座(23)的内径尺寸，前阀座(21)较阀座(23)远离负压 泵方向，后阀座(23)与前阀座(21)的过盈配合部位与后阀座(23)的凸起部位之间有空隙间距。
  19. 根据权利要求1-2任一项所述的单向阀系统，其特征在于，所述负压泵(5)，包括负压泵进气口(51)和负压泵出气口(52)，负压泵出气口(52)连接有鸭嘴阀(6)。
PCT/CN2022/109712 2021-08-05 2022-08-02 一种用于医用真空负压机的单向阀系统 WO2023011475A1 (zh)

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