WO2021196412A1 - 一种控制液体流量及流速的流控阀 - Google Patents

一种控制液体流量及流速的流控阀 Download PDF

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Publication number
WO2021196412A1
WO2021196412A1 PCT/CN2020/096259 CN2020096259W WO2021196412A1 WO 2021196412 A1 WO2021196412 A1 WO 2021196412A1 CN 2020096259 W CN2020096259 W CN 2020096259W WO 2021196412 A1 WO2021196412 A1 WO 2021196412A1
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WO
WIPO (PCT)
Prior art keywords
valve
flow
control valve
flow control
connecting portion
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PCT/CN2020/096259
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English (en)
French (fr)
Inventor
吴宇森
鲍海涛
张昊宁
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南京汉欣医药科技有限公司
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Publication of WO2021196412A1 publication Critical patent/WO2021196412A1/zh

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Classifications

    • 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
    • A61M39/24—Check- or non-return valves
    • 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
    • A61M19/00—Local anaesthesia; Hypothermia
    • 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
    • A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16804—Flow controllers
    • A61M5/16813—Flow controllers by controlling the degree of opening of the flow line
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16877—Adjusting flow; Devices for setting a flow rate
    • A61M5/16881—Regulating valves
    • 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
    • A61M39/24—Check- or non-return valves
    • A61M2039/242—Check- or non-return valves designed to open when a predetermined pressure or flow rate has been reached, e.g. check valve actuated by fluid
    • 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
    • A61M39/24—Check- or non-return valves
    • A61M2039/2433—Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc
    • 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
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/10—Trunk
    • A61M2210/1042—Alimentary tract
    • A61M2210/1046—Pharynx

Definitions

  • the present invention relates to the field of medical equipment, in particular to a flow control valve for controlling liquid flow and flow rate.
  • Throat anesthesia is widely used in throat surgery and endoscopy. It is mainly used for mucosal surface anesthesia to ensure that patients with sensitive throat reflexes can cooperate with the doctor to complete the examination.
  • an anesthesiologist performs laryngoscopy, tracheal intubation, and throat surgery on patients, they need to anaesthetize the patient's throat to relieve their pain.
  • the traditional throat anesthesia device includes a syringe and an injection catheter to spray anesthetic liquid to the throat through external force injection. This kind of throat anesthesia device sprays the liquid unevenly, and the spraying speed of the liquid is not easy to control.
  • the traditional infusion set generally includes an infusion needle, an infusion tube, a flow regulator, and a drip bucket, etc., which are connected by a catheter.
  • the infusion method is to hang a bottle or an infusion bag with liquid on a high place, and use gravity to make the liquid pass through the infusion.
  • the skin tube flows into the vein, and the flow rate needs to be manually adjusted by the flow regulator.
  • the degree of adjustment depends on the drip rate (drops/min) in the drip hopper.
  • the purpose of the present invention is to provide a new flow control valve for controlling liquid flow and flow rate, which has a simple structure and convenient operation, which can overcome the above-mentioned shortcomings of the prior art.
  • a flow control valve for controlling liquid flow and flow rate includes a valve sleeve and a valve core.
  • the valve sleeve includes a first connecting portion and a second connecting portion.
  • the connecting portion and the second connecting portion are both hollow structures;
  • the valve core includes a flapper, a circular flap, a connecting rod, and an elastic valve ring, and the middle of the flapper and the middle of the circular flap are connected to
  • the two ends of the connecting rod are respectively connected, the diameter of the circular baffle is smaller than the inner diameter of the valve sleeve, the elastic valve ring is sleeved on the periphery of the connecting rod, and the flap-shaped baffle is connected to the valve through the fan-shaped protrusion structure on the outer periphery.
  • the inner surface of the sleeve is connected, and the flow control valve is integrally formed except for the elastic valve ring.
  • the fan-shaped protrusion structure is connected to the inner surface of the first connecting portion or the inner surface of the second connecting portion.
  • the fan-shaped protrusion structure can be arranged on any part of the inner surface of the valve sleeve as required, preferably on the inner surface of the connection between the first connecting portion and the second connecting portion, which can increase the strength and service life of the valve core.
  • the elastic valve ring is a deformable medical silicone material, has excellent resistance to various chemicals, has no adverse reactions to the human body, and has better elasticity to further control the flow of fluid and The flow rate makes the fluid distribution more even.
  • the outer diameter of the elastic valve ring ⁇ the inner diameter of the valve sleeve can be used in the field of medical equipment, such as a throat anesthesia device, to make the fluid distribution more uniform and reduce secondary pollution caused by the backflow of the liquid medicine.
  • the outer diameter of the elastic valve ring ⁇ the inner diameter of the valve sleeve which can be used in the field of medical equipment, such as throat anesthesia devices, to make the fluid distribution more uniform and prevent secondary pollution caused by the backflow of liquid medicine; It can also be used in infusion devices. On the one hand, it can prevent adverse reactions caused by air entering blood vessels, and on the other hand, it can prevent secondary pollution caused by drugs or blood reflux.
  • the thickness of the elastic valve ring ⁇ the length of the connecting rod; preferably the thickness of the elastic valve ring ⁇ the length of the connecting rod, at this time the elastic valve ring can move along the connecting rod to play a buffering effect and reduce the elasticity of the fluid.
  • the stress of the valve ring is preferably 0.01-10 mm, it can be adjusted according to needs or the size of the flow control valve.
  • the liquid flow and flow rate are controlled by the thickness of the elastic valve ring. Under the same pressure, the smaller the thickness of the elastic valve ring, the greater the ring variable of the elastic valve, and the greater the flow rate; The greater the thickness of the elastic valve ring, the smaller the ring variable of the elastic valve and the lower the flow rate.
  • the outer diameters of the first connecting portion and the second connecting portion are the same or different, and can be adjusted according to needs, such as connection with other injection equipment, for matching.
  • the inner diameters of the first connecting portion and the second connecting portion are the same or different, and can be adjusted according to needs, such as connection with other injection equipment, for matching.
  • the inner surface or outer surface of the first connecting portion and the second connecting portion can be provided with threads as required, which can increase the connection strength with other equipment and prevent falling off.
  • the flow control valve provided by the present invention for controlling liquid flow and flow rate has the following technical effects: when it is used for throat anesthesia, the flow and flow rate of the anesthetic liquid can be controlled, so as to achieve aerosolization.
  • the effect is to make the liquid medicine spray more evenly, absorb more comprehensively, and have a better anesthetic effect, and reduce or prevent secondary pollution caused by drug reflux; when used in an infusion device, it can prevent adverse reactions caused by air entering the blood vessel on the one hand, and on the other On the one hand, it can prevent secondary pollution caused by medicine or blood backflow, and effectively avoid the phenomenon of blood back caused by the infusion of liquid medicine.
  • Fig. 1 is a perspective view of a flow control valve according to a preferred embodiment of the present invention.
  • Figure 2 is the A-A cross-sectional view of the flow control valve of Figure 1 (50% ratio).
  • Fig. 3 is a B-B cross-sectional view of the flow control valve of Fig. 1 (approximately 75%, view in the direction of the fluid inflow end).
  • Fig. 4 is a B-B cross-sectional view of the flow control valve of Fig. 1 (approximately 75%, a view in the direction of the fluid outflow end).
  • Figure 5 is a B-B cross-sectional view of the flow control valve in Figure 1 without the elastic valve ring (approximately 75%).
  • Fig. 6 is a perspective view of a valve core with an elastic valve ring installed.
  • Fig. 7 is a perspective view of the valve core without the elastic valve ring (a view in the direction of the fluid inflow end).
  • Figure 8 is a perspective view of a valve core without an elastic valve ring (a view in the direction of the fluid outflow end).
  • Figure 9 is a perspective view of the elastic valve ring.
  • Fig. 10 is a front view of the cross-sectional view of Fig. 2.
  • Fig. 11 is a left side view of the perspective view of Fig. 1.
  • Fig. 12 is a right side view of the perspective view of Fig. 1.
  • Figure 13 is a schematic diagram of an anesthesia injection device.
  • Figure 14 is a schematic diagram of an infusion device.
  • valve sleeve 1.1.1, first connecting part; 1.1.2, second connecting part; 1.2, valve core; 1.2.1, flap baffle; 1.2.1.1, fan-shaped protrusion Structure; 1.2.2, circular baffle; 1.2.3, connecting rod; 1.2.4, elastic valve ring; 2. injection device; 3. drug catheter; 3.1, marker; 4. infusion needle; 5. infusion bottle ; 6. Infusion tube.
  • Figures 1 to 14 show a preferred embodiment of the present invention.
  • FIG. 1 it is a perspective view of a flow control valve according to a preferred embodiment of the invention.
  • Figure 5 shows the BB cross-sectional view of the flow control valve without the elastic valve ring
  • Figure 6 shows the valve core with the elastic valve ring installed.
  • FIGS. 13 to 14 show schematic diagrams of the use method of the flow control valve.
  • the flow control valve 1 of the present invention includes a valve sleeve 1.1 and a valve core 1.2.
  • the valve sleeve 1.1 includes a first connecting portion 1.1.1 and a second connecting portion 1.1.2.
  • the first connecting portion 1.1.1 and the second connecting portion 1.1.2 are both hollow structures, and the outer diameter of the first connecting portion 1.1.1 is smaller than the outer diameter of the second connecting portion 1.1.2, and the first connecting portion 1.1.1
  • the inner diameter is equal to the inner diameter of the second connecting portion 1.1.2; the outer surface of the first connecting portion 1.1.1 and the inner surface of the second connecting portion 1.1.2 are provided with threads, which can increase the connection strength with other equipment and prevent falling off.
  • the valve core 1.2 includes a flap-shaped baffle 1.2.1, a circular baffle 1.2.2, a connecting rod 1.2.3, and an elastic valve ring 1.2.4, the flap-shaped baffle 1.2.1 in the middle and a circular baffle 1.2.2
  • the middle part is connected to the two ends of the connecting rod 1.2.3 respectively
  • the petal-shaped baffle 1.2.1 is arranged on the side close to the port of the first connecting part 1.1.1
  • the diameter of the circular baffle 1.2.2 is smaller than
  • the inner diameter of the valve sleeve 1.1, the elastic valve ring 1.2.4 is sleeved on the periphery of the connecting rod 1.2.3, and the flap-shaped baffle 1.2.1 passes through the fan-shaped protrusion structure 1.2.1.1 on its outer periphery and the valve sleeve 1.1 Surface connection, the flow control valve 1 is integrally formed except for the elastic valve ring 1.2.4.
  • the elastic valve ring 1.2.4 is a deformable medical silicone material, which has excellent resistance to a variety of chemicals, has no adverse reactions to the human body, and has better elasticity to further control the flow of fluid and The flow rate makes the fluid distribution more even.
  • the outer diameter of the elastic valve ring 1.2.4 is equal to the inner diameter of the valve sleeve 1.1, the thickness of the elastic valve ring 1.2.4 ⁇ the length of the connecting rod 1.2.3, and the thickness of the elastic valve ring 1.2.4 is 1 mm, at this time the elastic valve ring 1.2.4 can move along the connecting rod 1.2.3.
  • example 1 and example 2 respectively show the application method of the flow control valve of the present invention in the field of medical equipment, such as anesthesia injection device and infusion device.
  • the flow control valve 1 that controls the liquid flow rate and the flow rate is used for the injection of lidocaine hydrochloride in the throat in the anesthesia injection device.
  • the flow control valve 1 is arranged between the injection device 2 and the drug conduit 3, that is, the first connecting portion 1.1.1 of the valve sleeve in the flow control valve 1 is connected to the output end of the injection device 2, and the flow control valve
  • the second connecting part 1.1.2 of the valve sleeve in 1 is connected with the input end of the medicine catheter 3.
  • the flow control valve 1 that controls the flow rate and flow rate of the liquid is used for the infusion device.
  • the flow control valve 1 is set above the infusion needle 4, when the patient is infused, the medical liquid flows into the flow control valve 1 from the infusion bottle 5 through the infusion tube 6.
  • the liquid medicine flows into the valve core from the first connecting part 1.1.1 of the valve sleeve in the flow control valve 1, and flows to the elastic valve ring after being divided by the flapper.
  • the elastic valve ring undergoes elastic deformation under the pressure of the liquid medicine, and the liquid medicine Finally, it flows to the infusion needle and enters the human body.
  • the force provided by the gravity of the liquid medicine is not enough to deform the elastic valve ring.
  • the elastic valve ring returns to its original shape, which prevents air from entering the blood vessel caused by the liquid medicine flowing out, and prevents the medicine or blood from flowing back.

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  • Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Pulmonology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

一种控制液体流量及流速的流控阀（1），包括阀套（1.1）和阀芯（1.2），阀套（1.1）包括第一连接部（1.1.1）和第二连接部（1.1.2）且均是中空结构；阀芯（1.2）包括瓣型挡板（1.2.1）、圆形挡板（1.2.2）、连接杆（1.2.3）和弹性阀环（2.4），瓣型挡板（1.2.1）中部和圆形挡板（1.2.2）中部与连接杆（1.2.3）的两端分别连接，圆形挡板（1.2.2）直径小于阀套（1.1）内径，弹性阀环（2.4）套接在连接杆（1.2.3）外围，瓣型挡板（1.2.1）通过其外周的扇形凸起结构（1.2.1.1）与阀套（1.1）内表面连接，流控阀（1）除弹性阀环（2.4）外均是一体成型。将其用于咽喉麻醉时，流控阀（1）可以控制麻醉药液流量及流速，达到雾化效果，使药液喷洒更为均匀，吸收更全面并且不会造成药物回流的二次污染；在用于对输液时间、输液量有特定要求患者时，它可以有效解决定时定量的输液问题，还可有效避免药液输完导致的回血现象。

Description

一种控制液体流量及流速的流控阀 技术领域
本发明涉及医疗器械领域，特别是涉及一种控制液体流量及流速的流控阀。
 背景技术
咽喉麻醉法在咽喉部的手术及内窥镜检查时运用非常广泛，主要用于粘膜表面麻醉，以保证咽喉部反射敏感的患者能够配合医生完成检查。在临床实践中，麻醉科医生对患者进行喉镜检查、气管插管和咽喉手术的操作时，需对患者的咽喉进行麻醉以减轻其痛苦。
 技术问题
传统的咽喉麻醉装置包括注射器及注射导管，通过外力注射向咽喉部位喷洒麻醉药液，这种咽喉麻醉装置药液喷洒不均匀，且药液喷洒速度不好控制。
传统的输液器一般包括输液针、输液管、流量调节器和滴斗等，它们通过导管连接，输液方法是把装有液体的瓶或输液袋悬挂在高处，利用重力的作用使液体通过输液皮管流入静脉内，流量的大小需要通过流量调节器手动调节，调节的程度是看滴斗中的滴速（滴/分）。使用传统输液器进行输液时，必须要时刻注意药瓶中药液量的变化，若未及时发现药液滴空，空气便会由输液管进入血管或血液由输液管逆流。空气进入血管有可能引起不良后果，严重的会导致猝死。
 技术解决方案
本发明的目的是提供一种新的控制液体流量及流速的流控阀，其结构简单、操作方便，能够克服上述现有技术的不足。
为了实现上述目的，本发明提供如下技术方案，一种控制液体流量及流速的流控阀，包括阀套和阀芯，所述阀套包括第一连接部和第二连接部，所述第一连接部与所述第二连接部均是中空结构；所述阀芯包括瓣型挡板、圆形挡板、连接杆和弹性阀环，所述瓣型挡板中部和圆形挡板中部与连接杆的两端分别连接，所述圆形挡板直径小于阀套内径，所述弹性阀环套接在所述连接杆外围，所述瓣型挡板通过其外周的扇形凸起结构与阀套内表面连接，所述流控阀除弹性阀环外均是一体成型。
上述流控阀除弹性阀环外的其它结构可以用弹性材料一体注塑成型，也可以用刚性材料一体浇铸而成；其根据应用场景而定。
上述弹性阀环因为具有弹性，因此可用相应工具通过弹性阀环中间的通孔穿过圆形挡板，从而套接在所述连接杆外围。
当上述瓣型挡板设置在靠近第一连接部端口一侧时，则流体从第一连接部端口流入，从第二连接部端口流出；当上述瓣型挡板设置在靠近第二连接部端口一侧时，则流体从第二连接部端口流入，从第一连接部端口流出。瓣型挡板的具体设置方向根据应用场景而定。
作为本发明的进一步改进，所述扇形凸起结构与所述第一连接部内表面或第二连接部内表面连接。所述扇形凸起结构可以根据需要设置在阀套内表面任何部位，优选设置在第一连接部与第二连接部连接处内表面，可以增加阀芯的强度和使用寿命。
作为本发明的进一步改进，所述扇形凸起结构为三个或三个以上，可以实现分流的作用。
作为本发明的进一步改进，所述弹性阀环为可发生形变的医用硅胶材料，具有优异的耐多种化学药品性能，对人体无不良反应，且具有更好的弹性能够进一步控制流体的流量及流速，使流体分布更加均匀。
作为本发明的进一步改进，所述弹性阀环外径＜所述阀套内径，可用于医疗器械领域，如用于咽喉麻醉装置，使流体分布更加均匀，减少药液回流造成的二次污染。
作为本发明的进一步改进，所述弹性阀环外径≥所述阀套内径，可用于医疗器械领域，如用于咽喉麻醉装置，使流体分布更加均匀，防止药液回流造成的二次污染；也可用于输液装置，一方面可以防止空气进入血管导致的不良反应，另一方面还可以防止药物或血液回流造成的二次污染。
作为本发明的进一步改进，所述弹性阀环厚度≤所述连接杆长度；优选弹性阀环厚度＜连接杆长度，此时弹性阀环可沿连接杆移动，起到缓冲作用，减少流体对弹性阀环的应力。所述弹性阀环厚度优选为0.01~10 mm，可根据需要或流控阀尺寸进行调整，通过弹性阀环厚度控制液体流量和流速，在相同压力下，所述弹性阀环厚度越小，弹性阀环形变量越大，流速越大；所述弹性阀环厚度越大，弹性阀环形变量越小，流速越小。
作为本发明的进一步改进，所述第一连接部和第二连接部外径相同或不同，可以根据需要，如根据与其它注射设备的连接情况进行调整，以作匹配。
作为本发明的进一步改进，所述第一连接部和第二连接部内径相同或不同，可以根据需要，如根据与其它注射设备的连接情况进行调整，以作匹配。
作为本发明的进一步改进，所述第一连接部和第二连接部的内表面或外表面可根据需要设置螺纹，可以增加与其它设备的连接强度，防止脱落。
 有益效果
与现有技术相比，本发明提供的一种控制液体流量及流速的流控阀，具有如下技术效果：将其用于咽喉麻醉时，可以控制麻醉药液流量及流速，从而达到雾化的效果，使药液喷洒更为均匀，吸收更全面、麻醉效果更好，减少或防止药物回流造成的二次污染；在用于输液装置时，一方面可以防止空气进入血管导致的不良反应，另一方面可以防止药物或血液回流造成的二次污染，有效避免药液输完导致的回血现象。
 附图说明
图1为本发明一种优选实施方案的流控阀的立体图。
图2为图1流控阀的A-A剖面图(50%比例)。
图3为图1流控阀的B-B剖面图(约75%比例，流体流入端方向的视图)。
图4为图1流控阀的B-B剖面图(约75%比例，流体流出端方向的视图)。
图5为图1未安装弹性阀环的流控阀的B-B剖面图 (约75%比例)。
图6为安装有弹性阀环的阀芯的立体图。
图7为未安装弹性阀环的阀芯的立体图（流体流入端方向的视图）。
图8为未安装弹性阀环的阀芯的立体图（流体流出端方向的视图）。
图9为弹性阀环的立体图。
图10为图2剖面图的正视图。
图11为图1立体图的左视图。
图12为图1立体图的右视图。
图13为麻醉注射装置示意图。
图14为输液装置示意图。
图中各标记如下：
1、流控阀；1.1、阀套；1.1.1、第一连接部；1.1.2、第二连接部；1.2、阀芯；1.2.1、瓣型挡板；1.2.1.1、扇形凸起结构；1.2.2、圆形挡板；1.2.3、连接杆；1.2.4、弹性阀环；2、注射装置；3、药物导管；3.1、标识物； 4、输液针；5、输液瓶；6、输液管。
 本发明的最佳实施方式
现结合说明书附图中图1至图14对本发明作进一步的说明，图1至图14所展示的是本发明的一个较佳实施例。
如图1所示，是发明一种优选实施方案的流控阀的立体图。现对图1作A-A剖面，得到图2所示的A-A剖面图。对图1作B-B剖面，得到图3和图4所示的B-B剖面图。为了使本发明的流控阀结构和各部件之间的连接关系更加清晰，图5展示了未安装弹性阀环的流控阀的B-B剖面图，图6展示了安装有弹性阀环的阀芯立体图，图7~图8展示了未安装弹性阀环的阀芯立体图，图9展示了弹性阀环的立体图，图10~12展示了流控阀各个角度的平面视图。为了使本发明的流控阀对其使用用途的解释更加清楚，图13~图14展示了流控阀的使用方法示意图。
如图2~图8所示，本发明所述流控阀1包括阀套1.1和阀芯1.2，所述阀套1.1包括第一连接部1.1.1和第二连接部1.1.2，所述第一连接部1.1.1与所述第二连接部1.1.2均是中空结构，且第一连接部1.1.1外径小于第二连接部1.1.2外径，第一连接部1.1.1内径等于第二连接部1.1.2内径；第一连接部1.1.1外表面和第二连接部1.1.2的内表面设置有螺纹，可以增加与其它设备的连接强度，防止脱落。所述阀芯1.2包括瓣型挡板1.2.1、圆形挡板1.2.2、连接杆1.2.3和弹性阀环1.2.4，所述瓣型挡板1.2.1中部和圆形挡板1.2.2中部与连接杆1.2.3的两端分别连接，所述瓣型挡板1.2.1设置在靠近第一连接部1.1.1端口一侧，所述圆形挡板1.2.2直径小于阀套1.1内径，所述弹性阀环1.2.4套接在所述连接杆1.2.3外围，所述瓣型挡板1.2.1通过其外周的扇形凸起结构1.2.1.1与阀套1.1内表面连接，所述流控阀1除弹性阀环1.2.4外均是一体成型。扇形凸起结构1.2.1.1有三个，设置在第二连接部1.1.2内表面，且靠近第一连接部1.1.1一端，第二连接部1.1.2径向厚度比第一连接部1.1.1径向厚度大，因此可以增加阀芯1.2的强度和使用寿命。如图9所示，弹性阀环1.2.4为可发生形变的医用硅胶材料，具有优异的耐多种化学药品性能，对人体无不良反应，且具有更好的弹性能够进一步控制流体的流量及流速，使流体分布更加均匀。如图10~图12所示，所述弹性阀环1.2.4外径等于所述阀套1.1内径，弹性阀环1.2.4厚度＜连接杆1.2.3长度，弹性阀环1.2.4厚度为1 mm，此时弹性阀环1.2.4可沿连接杆1.2.3移动。
下面实施例1和实施例2分别展示了本发明的流控阀在医疗器械领域，具体如麻醉注射装置和输液装置中的使用方法。
 本发明的实施方式
实施例1：
根据上述结构，将控制液体流量及流速的流控阀1用于麻醉注射装置中咽喉盐酸利多卡因的注射。如图13所示，流控阀1设置在注射装置2与药物导管3之间，即流控阀1中阀套的第一连接部1.1.1与注射装置2的输出端连接，流控阀1中阀套的第二连接部1.1.2与药物导管3的输入端连接。当使用注射装置2注射药液时，将药物导管3凸面朝上，缓慢插入病人的咽喉，直至标识物3.1到达病人的声带附近，即可停止深入，在外力的作用下药液由注射装置2依次经过流控阀1流进阀芯，通过瓣型挡板分流后流向弹性阀环，弹性阀环在药液的压力下发生弹性形变，药液最后流入药物导管从而使得药液分布更加均匀，流速更快，高速水流碰到障碍物后会裂成小水滴，从而形成喷雾。使得盐酸利多卡因能以雾状的形式注射到咽喉部位，从而增强麻醉效果。在注射完成后不易出现药液回流，造成二次污染。
实施例2：
根据上述结构，将控制液体流量及流速的流控阀1用于输液装置。如图14所示，流控阀1设置在输液针4上方，当病人输液时，药液由输液瓶5经输液管6流入流控阀1。药液由流控阀1中阀套的第一连接部1.1.1流进阀芯，通过瓣型挡板分流后流向弹性阀环，弹性阀环在药液的压力下发生弹性形变，药液最后流向输液针进入人体。当药液逐渐流尽时，药液重力提供的力不足以使弹性阀环发生形变，此时弹性阀环恢复原形，避免了药液流尽导致的空气进入血管，而且能防止药物或血液倒流造成的二次污染。
以上所述仅是本发明的优选实施方式，本发明的保护范围并不仅限于上述实施例，凡属于本发明思路下的技术方案均属于本发明的保护范围。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理前提下的若干改进和润饰，也应视为本发明的保护范围。
 工业实用性
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Claims (10)

  1. 一种控制液体流量及流速的流控阀，包括阀套和阀芯，其特征在于，所述阀套包括第一连接部和第二连接部，所述第一连接部与所述第二连接部均是中空结构；所述阀芯包括瓣型挡板、圆形挡板、连接杆和弹性阀环，所述瓣型挡板中部和圆形挡板中部与连接杆的两端分别连接，所述圆形挡板直径小于阀套内径，所述弹性阀环套接在所述连接杆外围，所述瓣型挡板通过其外周的扇形凸起结构与阀套内表面连接，所述流控阀除弹性阀环外均是一体成型。
  2. 根据权利要求1所述的控制液体流量及流速的流控阀，其特征在于，所述扇形凸起结构与所述第一连接部内表面或第二连接部内表面连接。
  3. 根据权利要求1所述的控制液体流量及流速的流控阀，其特征在于，所述扇形凸起结构为三个或三个以上。
  4. 根据权利要求1所述的控制液体流量及流速的流控阀，其特征在于，所述弹性阀环为可发生形变的医用硅胶材料。
  5. 根据权利要求1所述的控制液体流量及流速的流控阀，其特征在于，所述弹性阀环外径＜所述阀套内径。
  6. 根据权利要求1所述的控制液体流量及流速的流控阀，其特征在于，所述弹性阀环外径≥所述阀套内径。
  7. 根据权利要求1 所述的控制液体流量及流速的流控阀，其特征在于，所述弹性阀环厚度≤所述连接杆长度。
  8. 根据权利要求1所述的控制液体流量及流速的流控阀，其特征在于，所述第一连接部和第二连接部外径相同或不同，所述第一连接部和第二连接部内径相同或不同。
  9. 根据权利要求1所述的控制液体流量及流速的流控阀，其特征在于，所述第一连接部和第二连接部的内表面或外表面可根据需要设置螺纹或凹槽或凸点。
  10. 根据权利要求1~9任一项所述的控制液体流量及流速的流控阀，其特征在于，所述流控阀在医疗器械领域可用于控制流体流量和流速方面的用途。
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Publication number Priority date Publication date Assignee Title
US4332249A (en) * 1980-08-01 1982-06-01 Sherwood Medical Industries, Inc. Filter and valve assembly for hypodermic syringe
CN1674957A (zh) * 2002-08-13 2005-09-28 株式会社Jms 流体控制装置
WO2007083892A1 (en) * 2006-01-20 2007-07-26 Seung-Hwan Heo Device for protecting flowing backward of blood
WO2011095766A1 (en) * 2010-02-02 2011-08-11 Imperial Innovations Limited Manometer and three-way valve
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