CN1320275C - Micro-thin film pump with double-directional overpressure protection function and application thereof - Google Patents

Micro-thin film pump with double-directional overpressure protection function and application thereof Download PDF

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CN1320275C
CN1320275C CNB031241824A CN03124182A CN1320275C CN 1320275 C CN1320275 C CN 1320275C CN B031241824 A CNB031241824 A CN B031241824A CN 03124182 A CN03124182 A CN 03124182A CN 1320275 C CN1320275 C CN 1320275C
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pump
chamber
micro
membrane
inlet
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CN1548737A (en
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王勤
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王勤
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Abstract

一种具有双向过压保护功能的微量薄膜泵,是将作为动力源的致动器置于一泵膜的上方并带动泵膜作上下往复运动,该泵膜封固于上泵体的开口周缘,且上泵体内至少设有一工作腔室及一与流体出口相通的环状腔,一下泵体内设有一进液腔室及一压力互锁腔室,该进液腔室与一液体入口相通,一阀膜置于上下泵体之间,并在阀膜的适当位置处设有与工作腔室相通的孔。 Micro membrane pump having a bidirectional overvoltage protection function, is as a power source placed above the actuator and driven by a pump membrane pump membrane makes reciprocating movement, the pump membrane is sealed to the periphery of the opening on the pump body and the pump body is provided with at least one working chamber and an outlet in fluid communication with the annular chamber, at the pump body is provided with a liquid inlet chamber and a pressure interlock chamber, the inlet chamber communicating with a liquid inlet, a diaphragm pump disposed between the upper and lower, and a hole communicating with the working chamber in place of the diaphragm. 由于该泵具有压力互锁功能,即当输入端液体压力高于输出端液体压力时,该泵输入端的液体也不会不受泵体的控制而产生直通排放,故该泵在作为胰岛素泵或其他医用微量泵时具有更高的安全性和可靠性。 Since the pump has a pressure interlock function, i.e., when the input liquid pressure is higher than the output of liquid pressure, the pump input is not generated uncontrolled pump through the discharge, so the pump as an insulin pump or other medical micropump has a higher level of security and reliability.

Description

具有双向过压保护功能的微量薄膜泵及其应用 Micro membrane pump and its application with two-way overvoltage protection function

技术领域 FIELD

本发明涉及薄膜泵,尤指一种应用在生物工程、血液循环系统中、非直通式的、当进口压力大时,流体也不能由泵直接排出的具有双向过压保护功能微量薄膜泵。 The present invention relates to a diaphragm pump, especially a micro membrane pump bidirectional overvoltage protection has an application in biotechnology, the blood circulatory system, the non-straight-through, when the inlet pressure, the fluid can not be discharged directly from the pump.

背景技术 Background technique

目前已经公开多种形式的微泵。 Now open forms of micro-pump. 例如:一种《薄膜泵》,其专利号为96211924.5,其结构如图5、6所示。 For example: a 'membrane pump ", which patent No. 96211924.5, the structure shown in Figure 5,6. 该泵的工作原理是:一电机2固定在支架1上,振动膜9安装在气室3内,被压片8固定在摆杆10上,并通过摆杆10和偏心轮6与电机主轴联接,阀片5安放在阀体4、7之间、阀体上分别开设有进气孔11和出气孔12,并在出气孔及进气孔的一侧设有同样的阀片托13,且两阀片托的设置方向相反,其作用是减少振动膜的振动幅度,增加气室的密闭性,以提高泵的抽气压差。 Working principle of the pump is: a motor 2 is fixed to the holder 1, the diaphragm 9 is mounted in the gas chamber 3, is press plate 8 is fixed to the pendulum 10, and 10 and the cam 6 is coupled to the motor shaft by pivot lever , the valve plate 5 is placed between the valve body 4, 7, defines a respective inlet hole 11 and outlet hole 12 on the valve body, and provided with the same valve plate holder 13 and the intake hole in the air outlet side, and two valve disposed opposite directions Torr, the effect is to reduce the vibration amplitude of the diaphragm, increasing the air tightness of the chamber, to increase the suction pressure of the pump.

又如:专利号为00210385的《智能型胰岛素的传动机构》,利用丝杠螺母机构将电机的输出运动转换成针筒活塞的直线运动,实现向人体补充胰岛素的功能,以满足人工智能型胰岛素输注的使用要求。 Another example: Patent No. 00210385 "intelligent transmission mechanism of insulin", screw nut mechanism utilizing the output of the motor into a linear motion of the piston motion of the syringe, to implement the functions of the body to add insulin to insulin satisfy AI use infusion requirements.

上述习知技术中均是采用机械的传动方式,其P入>P出+P阀膜,液体是经入口直接排出,为直通式排放,又由于为机械运动带动薄膜的上下运动,而使其结构相对复杂、稳定性较差,使用寿命低、适用范围窄。 The above-described conventional techniques are employed for mechanical drive mode, into which P> P + P a diaphragm, the liquid is discharged directly via the inlet as a straight-through emissions, and because the vertical movement of the film drive mechanical motion, and it structure is relatively complex, poor stability, low life, narrow scope.

发明内容 SUMMARY

本发明的主要目的,在于提供一种非机械传动、非直通式排放,而是以一致动器作为动力源,可带动设置于其下方的泵膜作上下往复运动,使泵腔内的体积变化,进而达到从入口吸入液体,从出口排出液体的带压力互锁的微量薄膜泵。 The main object of the present invention is to provide a non-mechanical transmission, the non-straight-through emissions, but rather to an actuator as a power source, provided that it can be driven up and down reciprocating movement of the pump membrane downward, so that the volume change of the pump chamber , and then to the liquid from the suction inlet, the discharge pressure of the liquid micro membrane pump with an outlet from the interlocking.

本发明的目的在于,提供一种具有双向过压保护功能微量薄膜泵,其出口阀的背面设有一与入口连通的空腔,该空腔可以实现压力互锁功能,即当达到入口的液体压力波动时,输入端的液体不会因为压力过高而直接从出口排出。 Object of the present invention is to provide a bidirectional overvoltage protection micro membrane pump, its outlet back surface of a valve provided with a cavity communicating with the inlet, the cavity pressure may be achieved interlocking function, i.e. when the liquid pressure reaches the inlet when the fluctuation of liquid input will not be discharged directly from the high pressure outlet.

本发明的又一目的在于,提供一种体积小、流量小,使用方便、寿命长,便于携带的、且应用于胰岛素泵或医用微量泵上的带压力互锁的微量薄膜泵。 A further object of the present invention is to provide a small, low flow, easy to use, long life, easy to carry, and a thin film is applied to micro-pump with pressure on the insulin pump or micro-pump for medical interlocking.

本发明的技术方案:一种具有双向过压保护功能的微量薄膜泵,主要包括:上、下泵体,其特征在于:一作为动力源的致动器置于一泵膜的上方并带动泵膜作上下往复运动,该泵膜封固于上泵体的开口周缘,且上泵体内至少设有一工作腔室及一与流体出口相通的环状腔,一下泵体内设有一进液腔室及一压力互锁腔室,该进液腔室与一液体入口相通,一阀膜置于上下泵体之间,并在阀膜的适当位置处设有与工作腔室相通的孔。 Aspect of the present invention: one micro membrane pump with bidirectional overvoltage protection, including: upper and lower pump body, wherein: as a power source placed above an actuator pump driven by a pump and the membrane film makes reciprocating motion in the pump membrane sealing the opening circumferential edge of the pump body and the pump body is provided with at least one working chamber and an outlet in fluid communication with the annular chamber, at the pump body is provided with a liquid inlet chamber and a pressure interlock chamber, the inlet chamber communicating with a liquid inlet, a valve membrane interposed between the upper and lower pump, and a hole communicating with the working chamber in place of the diaphragm. 其中:所述具有双向过压保护功能的微量薄膜泵为具有进液阀部与出液阀部且所述进液阀部与出液阀部并列配置的带压力互锁的微量薄膜泵。 Wherein: the micro-diaphragm pump having a bidirectional overvoltage protection function having an inlet valve and the liquid valve portion and the inlet portion of the valve portion and the liquid valve portion arranged in parallel with a pressure interlocking micro membrane pump.

所述上泵体的上表面设有与泵膜相匹配的浅凹槽及设于浅凹槽底面的两个并列的左、右工作腔室,并于右腔室的周围设有下开口的环状腔,及与环状腔相连通的一液体出口。 The upper surface of the pump body is provided with a pump diaphragm to match the shallow recess and the two parallel shallow recess provided in the bottom surface of the left and right working chamber, and to right chamber is provided around the lower opening annular chamber, and a liquid outlet communicating with the annular chamber.

所述下泵体的上表面设有两并列的进液腔室及压力互锁腔室,该两腔室底部分别与设于下泵体内的带有液体入口的流道相通,并在进液腔室的周围设有上开口的环状腔。 The upper surface of the lower pump body is provided with a pressure inlet chamber and two parallel interlock chamber, the bottom of the two chambers each with a liquid inlet flow passage communicating with the pump body provided in the lower and in the feed an annular chamber surrounding the cavity opening.

所述阀膜是一具有足够弹性、韧性的薄膜,可由耐腐蚀、耐磨的橡胶、塑胶或金属薄膜制成,封固于上、下泵体之间,并可随泵压的变化分别封盖于左、右工作腔室,另在相对下泵体的环状腔的适当位置处设有与左工作腔室相通的孔。 The valve is a film having sufficient elasticity, toughness of the film, may be corrosion-resistant, wear-resistant rubber, plastic or metal film made of, on the sealing between the pump, with the pump and pressure changes were sealed cover the left and right working chambers, the left and the other with a hole communicating the working chamber at an appropriate position relative to the lower annular chamber of the pump body.

本发明还可通过以下方案实现:所述具有双向过压保护功能的微量薄膜泵为具有进液阀部与出液阀部且所述进液阀部与出液阀部同心配置的带压力互锁微量薄膜泵。 The present invention can also be implemented by the following scheme: the trace has a bidirectional overvoltage protection film having a pump inlet valve and the liquid valve portion and the inlet portion with the liquid pressure valve portion and the liquid valve arranged concentrically cross section lock micro membrane pump. 其中:所述上泵体中间设有与泵膜相匹配的贯通的上、下工作腔室,其工作腔室的周围设有下开口的环状腔,及与环状腔相连通的一液体出口。 Wherein: said pump is provided on the intermediate film and the pump through the match, the working chamber, around which the working chamber is provided with a lower opening annular chamber and annular chamber communicating with a liquid Export.

所述下泵体的中间设有一腔室,其周围设有向上开口的进液腔室及压力互锁腔室,该进液腔室与带有液体入口的流道相通。 The pump is provided with a lower intermediate chamber, which is surrounded by a chamber inlet and a pressure interlock chamber open upwardly, the inlet chamber and the inlet flow passage in communication with the liquid.

所述阀膜是一具有足够弹性、韧性的薄膜,可由耐腐蚀、耐磨的橡胶、塑胶或金属薄膜制成,相对下泵体腔室的适当位置处设有一与工作腔室相通的孔,封固于上、下泵体之间,并随泵压的变化封盖于工作腔室。 The valve is a film having sufficient elasticity, toughness of the film, may be corrosion-resistant, wear-resistant rubber, plastic or metal film, at appropriate locations relative to the pump chamber is provided with a hole communicating with the working chamber, sealed fixed to the upper and lower between the pump and the pump pressure changes with the closure in the working chamber.

以上的致动器可以是压电陶瓷或磁致伸缩材料或电磁铁、甚至用电机轴上的凸轮压一个弹簧片所构成。 The above actuator may be a piezoelectric ceramic or a magnetostrictive material or an electromagnet, and even with a compression cam motor shaft spring piece constituted.

一种具有双向过压保护功能的微量薄膜泵,可应用在胰岛素泵或镇痛泵或其他医用微量输液泵上使用。 Micro membrane pump having a bidirectional overvoltage protection, application may be used in analgesia or insulin pump or other micro medical infusion pump. 具体技术方案如下:一种胰岛素泵,包括具有双向过压保护功能的微量薄膜泵,主要包括:上、下泵体,其特征在于:一作为动力源的致动器置于一泵膜的上方并带动泵膜作上下往复运动,该泵膜封固于上泵体的开口周缘,且上泵体内至少设有一工作腔室及一与流体出口相通的环状腔,一下泵体内设有一进液腔室及一压力互锁腔室,该进液腔室与一液体入口相通,一阀膜置于上下泵体之间,并在阀膜的适当位置处设有与工作腔室相通的孔。 In particular the following technical solution: an insulin pump including micro membrane pump with bidirectional overvoltage protection, including: upper and lower pump body, wherein: the top of the actuator as a power source disposed in a pump membrane and drive up and down reciprocating movement of the pump membrane, the pump membrane to the sealing edge of the opening on the periphery of the pump body and the pump body is provided with at least one working chamber and an outlet in fluid communication with the annular chamber, at the pump body is provided with a liquid inlet and a pressure chamber interlock chamber, the inlet chamber communicating with a liquid inlet, a valve membrane interposed between the upper and lower pump, and a hole communicating with the working chamber in place of the diaphragm.

一种镇痛泵,包括具有双向过压保护功能的微量薄膜泵,主要包括:上、下泵体,其特征在于:一作为动力源的致动器置于一泵膜的上方并带动泵膜作上下往复运动,该泵膜封固于上泵体的开口周缘,且上泵体内至少设有一工作腔室及一与流体出口相通的环状腔,一下泵体内设有一进液腔室及一压力互锁腔室,该进液腔室与一液体入口相通,一阀膜置于上下泵体之间,并在阀膜的适当位置处设有与工作腔室相通的孔。 One analgesic pump, including micro membrane pump with bidirectional overvoltage protection, including: upper and lower pump body, wherein: the top of the actuator as a power source and disposed a driven pump membrane pump membrane for vertical reciprocating movement, the pump membrane sealing the opening periphery on the pump body and the pump body is provided with at least one working chamber and an outlet in fluid communication with the annular chamber, at the pump body is provided with a liquid inlet chamber and a interlock pressure chamber, the inlet chamber communicating with a liquid inlet, a valve membrane interposed between the upper and lower pump, and a hole communicating with the working chamber in place of the diaphragm.

一种医用微量输液泵,包括具有双向过压保护功能的微量薄膜泵,主要包括:上、下泵体,其特征在于:一作为动力源的致动器置于一泵膜的上方并带动泵膜作上下往复运动,该泵膜封固于上泵体的开口周缘,且上泵体内至少设有一工作腔室及一与流体出口相通的环状腔,一下泵体内设有一进液腔室及一压力互锁腔室,该进液腔室与一液体入口相通,一阀膜置于上下泵体之间,并在阀膜的适当位置处设有与工作腔室相通的孔。 A medical micro-infusion pump, including micro membrane pump with bidirectional overvoltage protection, including: upper and lower pump body, wherein: as a power source placed above an actuator pump driven by a pump and the membrane film makes reciprocating motion in the pump membrane sealing the opening circumferential edge of the pump body and the pump body is provided with at least one working chamber and an outlet in fluid communication with the annular chamber, at the pump body is provided with a liquid inlet chamber and a pressure interlock chamber, the inlet chamber communicating with a liquid inlet, a valve membrane interposed between the upper and lower pump, and a hole communicating with the working chamber in place of the diaphragm.

本发明的优点在于:1、由于该泵带有压力互锁功能,因此当液体输入端出现比输出端压力高时,即P入>P出时,它能够防止液体不会受泵体的控制而产生直通排放,即使进口压力再高,流体也无法通过泵直接流出,故在作为胰岛素泵或镇痛泵时更具安全性、可靠性。 Advantage of the present invention is: 1, since this pump with a pressure interlock, so that when the liquid present at the input is higher than the pressure at the output, i.e. the P> P out, it is possible to prevent the liquid pump is not controlled generated through the discharge, then even if the inlet pressure is high, the fluid can not flow out directly through the pump, it is more secure, reliable when used as an insulin pump or analgesia. 而习知的薄膜泵则不受泵体的控制直接排放,造成对人体不应有的危害,而不能使用。 The conventional film uncontrolled pump is the pump of direct emissions, should not cause any harm to humans, but can not be used.

2、由于致动器本身即是动力源,为非机械式传动,故其结构简单、体积小、成本低、使用寿命长。 2, because the actuator itself is a power source, a non-mechanical transmission, so that a simple structure, small size, low cost, and long service life.

附图说明 BRIEF DESCRIPTION

图1为本发明第一实施例的立体剖视图。 Figure 1 is a perspective cross-sectional view of a first embodiment of the present invention.

图2为本发明第一实施例的剖视图。 Cross-sectional view of a first embodiment of the present invention. FIG. 2.

图3为本发明第二实施例的立体剖视图。 Figure 3 is a perspective cross-sectional view of the second embodiment of the present invention.

图4为本发明第二实施例的剖视图。 A cross-sectional view of a second embodiment of the present invention in FIG. 4.

图5为习知技术的结构剖视图。 5 a sectional view of the structure of a conventional technique.

图6为习知技术阀片托的结构示意图。 FIG 6 is a schematic structural diagram of a conventional valve art Torr.

图7-8为压力互锁原理与一般往复泵原理图。 FIG. 7-8 and the general principles interlocking reciprocating pump pressure diagram.

具体实施方式 Detailed ways

本发明具有双向过压保护功能的微量薄膜泵的工作原理是,采用一致动器作为泵的动力源,可带动置于下面的泵膜作上下往复运动,使泵腔内的体积变化,达到从入口吸入液体,从出口排出液体,另在出口阀的背面有一连通与入口的空腔,该空腔提供压力互锁功能,使得当达到入口的液体压力发生波动时也不会使更多的液体从出口直接排出,即:P入再大也不能直接排出。 Micro membrane pump working principle of the present invention has a bidirectional overvoltage protection function is used as a power source of an actuator of the pump, the pump may be driven below the membrane positioned to reciprocate up and down, and the volume change of the pump chamber, reaches from a liquid suction inlet, the liquid is discharged from the outlet, and another inlet in communication with a cavity in a backside of the outlet valve, the cavity providing a pressure interlock function such that when the inlet fluid pressure reaches fluctuation occurs not cause more liquid directly discharged from the outlet, i.e.: P into another big can not be directly discharged. 因泵本身具有压力互锁功能,只有当P入>P阀1+P泵室1和P泵室2>P阀2+P入同时满足时泵才能持续导通(P泵室1和P泵室2为泵室主动扩大时和缩小时的压力)。 Due to a pressure interlock pump itself, only when the P> P 1 + P valve pump chamber of the pump chamber 1 and P 2> P 2 + P valve into the pump in order to meet the continuous conduction (P 1 and the pump chamber of the pump P room 2 is the initiative to expand the pump chamber when the pressure in and out of). 从上式可以看出,当泵室压力不发生主动变化时,再大的输入压力也无法直接输送到泵的输出端,因此,该泵与习知技术相比成为一非直通式排放泵。 As can be seen from the above equation, when the pump chamber when the pressure of the drive do not change, then a big pressure can not be input directly to the output of the pump, and therefore, the pump as compared to the prior art to be a non-straight-discharge pump.

实施例1参见图1-2,为一种进液阀部与出液阀部双阀并列配置的带压力互锁的微量薄膜泵,主要包括:致动器1、泵膜2、上泵体3、阀膜4及下泵体5;其中:致动器1的下方设有一泵膜2,泵膜2是一具有足够弹性、韧性的薄膜,可由耐腐蚀、耐磨的橡胶、塑胶或金属箔制成,封固于上泵体3开口的周缘,该致动器1可为压电陶瓷,其两极通电后会自动伸缩或弯曲带动泵膜2作垂直往复运动。 1-2, as a portion of the inlet valve and the liquid valve portion arranged in parallel with a double valve interlock micro membrane pump pressure Example embodiment Referring to Figure 1, including: an actuator, the pump diaphragm 2, the pump body 3, 4 and the lower valve membrane pump 5; wherein: the bottom of the actuator 1 is provided with a membrane pump 2, the pump 2 is a film having sufficient elasticity, toughness of the film, may be corrosion-resistant, wear-resistant rubber, plastic or metal made of a foil, sealing the peripheral edge of the upper opening of the body 3, the actuator may be a piezoelectric ceramic, the two poles of power automatically driven pump diaphragm to flex or bend 2 for vertical reciprocating movement.

上泵体3,其上表面设有与泵膜2相匹配的浅凹槽及设于浅凹槽底面的两个并列的左、右工作腔室C,C1,并于右腔室C1的周围设有下开口的环状腔D,及与环状腔D相连通的一液体出口7。 The pump body 3, which is provided on the surface of the membrane pump 2 matches the shallow recess and the two parallel shallow recess provided in the bottom surface of the left and right working chamber C, C1, and to the right around the chamber C1 the annular chamber is provided with an opening D, and a liquid outlet 7 and the annular chamber D in communication. 该左工作腔室C可大于右工作腔室C1。 The left working chamber C can be greater than the right working chamber C1.

下泵体5,其上表面设有两并列的进液腔室A及压力互锁腔室A1,该两腔室底部分别与设于下泵体5内的带有液体入口6的流道相通,并在进液腔室A的周围设有上开口的环状腔B。 The pump 5, which is provided with two parallel upper surface of the inlet chamber A and the chamber pressure interlock A1, respectively, the bottom of the two chambers with the liquid flow path 6 in the inlet communicates with the pump 5 provided in the lower and an annular chamber surrounding the opening of the inlet chamber a, B. 该压力互锁腔室A1可大于进液腔室A。 The interlock pressure chamber A1 may be greater than the inlet chamber A.

阀膜4,是一具有足够弹性、韧性的薄膜,可由耐腐蚀、耐磨的橡胶、塑胶或金属箔制成,封固于上泵体3与下泵体5之间,并可随泵压的变化分别封盖于左、右工作腔室C,C1,另在相对下泵体5的环状腔B的适当位置处设有与左工作腔室C相通的孔8。 Valve film 4 is a sufficiently resilient, tough film, by corrosion, wear-resistant rubber, plastic or metal foil made of sealing between the pump 3 and the pump body 5, and with the pump pressure changes in the closure are the left and right working chamber C, a C1, and the left working chamber C communicates with the other hole 8 in position relative to the pump body of the annular chamber B 5.

上述致动器1、泵膜2、上泵体3、阀膜4及下泵体5均可为长方体、正方体或其它相互配合的结构体。 The above-described actuator 1, the pump diaphragm 2, pump body 3, 4 and the lower diaphragm pump 5 may be a rectangular parallelepiped, cube, or other cooperating structure.

工作时,当致动器1向上运动时,带动泵膜2向上,使工作腔C的体积加大61,使阀膜4的AC处向上吸,液体则从进液腔A进入环状腔B,并经阀膜4上的通孔8进入工作腔室C,因此有61量的液体从液体入口6经进液腔A、环状腔B到工作腔C。 In operation, when the actuator 1 moves upward, the upward drive pump diaphragm 2, the volume of the working chamber 61 C is increased, the valve 4 at the AC film is sucked up, the liquid A from the inlet chamber into the annular chamber B , and by the valve membrane through hole 48 into the working chamber C, with the amount of liquid 61 into the liquid chamber 6 via the liquid a from the inlet annular chamber to the working chamber B C.

当致动器1向下运动时,阀膜4的AC处闭合,工作腔室C中的液体压向阀膜4的工作腔室C1与压力互锁腔A1之间,使阀膜4打开,液体流向环状腔D自液体出口7排出。 When the actuator 1 moves downward, the valve closing film 4 at the AC, the working fluid chamber C is pressed against the valve membrane between the working chamber 4 and the pressure interlock chamber C1 A1, the membrane valve 4 is opened, liquid to the annular chamber D is discharged from the liquid outlet 7.

当进液腔A处的压力加大时,该压力打开阀膜4的AC处,该压力经过ABC直到C1处。 When the pressure at the inlet chamber A to increase the opening pressure of the valve film 4 AC, ABC until the pressure through C1. 当没有压力互锁腔A1时,此压力将打开C1处的阀膜4使液体流向环状腔D,从而使液体直接从入口6到出口7直通排出。 When there is no pressure interlock chamber A1, the pressure will open the valve film 4 C1 liquid flow at the annular chamber D, so that the liquid is discharged straight from the inlet 6 to the outlet 7. 但有了压力互锁腔A1的设置,并与进液腔A连通,故工作腔C1处的压力将小于压力互锁腔A1处的压力,使C1-A1处的阀膜4不能变形,不能打开C1-D的通路,因此该泵体的泵液量将不受输入压力的影响自液体出口7排出,故更具安全性。 But with a pressure interlock chamber A1 is disposed, and communicates with the inlet chamber A, so that the working pressure chamber C1 is less than the pressure at the interlocking A1 of the cavity, the valve membrane at the A1-C1 4 can not be deformed, can not be C1-D path is opened, so that the liquid rate of the pump will be affected by the input pump discharge pressure from the liquid outlet 7, it is more secure.

实施例2参见图3-4,为一种进液阀部与出液阀部双阀同心配置的带压力互锁的微量薄膜泵,主要包括:致动器1、泵膜2、上泵体3、阀膜4及下泵体5,其中:致动器1的下方设有一泵膜2,泵膜2是一具有足够弹性、韧性的薄膜,可由耐腐蚀、耐磨的橡胶、塑胶或金属箔制成,封固于上泵体3开口的周缘,该致动器1可为磁致伸缩材料制成,外加磁埸可产生伸缩以带动泵膜2作垂直往复运动。 Example 2 Referring to FIGS. 3-4, as a micro-membrane pump and a hydraulic valve unit liquid valve portion disposed concentrically double valve with pressure into the interlocking, including: an actuator, the pump diaphragm 2, the pump body 3, 4 and the lower valve membrane pump 5, wherein: the bottom of the actuator 1 is provided with a membrane pump 2, the pump 2 is a film having sufficient elasticity, toughness of the film, may be corrosion-resistant, wear-resistant rubber, plastic or metal made of a foil, sealing the peripheral edge of the upper opening of the body 3, the actuator 1 may be made of a magnetostrictive material, may be expanded or contracted external magnetic electroluminescent film to drive the pump 2 for vertical reciprocating movement. 上述致动器1可为圆盘状或底面带有弧形的圆盘体。 Said actuator body 1 may be provided with a disc-shaped or curved bottom surface of a disk.

上泵体3中间设有与泵膜2相匹配的贯通的上、下工作腔室C,C1,其工作腔室C1的周围设有下开口的环状腔D,及与环状腔D相连通的一液体出口7。 The pump body 3 is provided on the intermediate match the pump through the film 2 around the working chamber C, C1, C1 which working chamber is provided with an opening in the annular chamber under D, and connected with the annular chamber D a liquid through the outlet 7. 该上工作腔室C可大于下工作腔室C1。 The upper working chamber C may be greater than the lower working chamber C1.

下泵体5的中间设有一腔室E,其周围设有向上开口的进液腔室A及压力互锁腔室A1,该进液腔室A与带有液体入口6的流道相通。 The pump 5 is provided with an intermediate chamber E, which is surrounded by the inlet pressure in chamber A and A1 interlock upwardly open chamber, the inlet chamber A and the chamber with liquid inlet passage 6 communicates.

阀膜4是一具有足够弹性、韧性的薄膜,相对下泵体腔室E的适当位置处设有一与工作腔室C相通的孔8,可由耐腐蚀、耐磨的橡胶、塑胶或金属薄膜制成,封固于上泵体3与下泵体5周缘之间,并可随泵压的变化封盖于工作腔室C1。 4 is a diaphragm having a sufficient elasticity, toughness of the film, at appropriate locations relative to the pump chamber E is provided with a working chamber communication hole 8 C, may be resistant to corrosion, wear-resistant rubber, plastic or metal film , sealing between the pump body at the peripheral edge 3 to the 5 pump, and the pump pressure varies with the closure in the working chamber C1.

工作时,当致动器1向上运动时,带动泵膜2向上使工作腔C的体积加大压力减小,使阀膜4的工作腔室C1处向上变形,致使进液腔A至腔室E处产生间隙,液体则从A-C1间隙处进入腔室E,并经阀膜4上的通孔8进入工作腔室C。 In operation, when the actuator 1 moves upward, driven by the pump 2 to make up the volume of the membrane chamber C to increase the working pressure decreases, the valve working chamber upwardly deform the membrane 4 at C1, causing the inlet chamber A to the chamber E is generated at the gap, a-C1 liquid from the gap into the chamber E, and through the valve membrane through hole 48 into the working chamber C.

当致动器1向下运动时,泵膜4关闭AE间隙,但由于工作腔C体积减小压力加大,使泵膜2向下运动产生C1-D处的间隙,使液体通过此间隙进入环状腔D自液体出口7排出。 1 when activated downward movement of the actuator, the pump diaphragm AE gap 4 is closed, but because of the volume of the working chamber C is reduced pressures, so that downward movement of the pump membrane 2 is generated at the gap C1-D, the liquid enters through this gap D is discharged from the annular chamber 7 the liquid outlet.

当液体入口处6突然产生高压,此压力会顶开AE间的阀膜4,进入E腔到C腔,但当它试图顶开C1-D间的阀膜4时,遇到了液体入口处的压力大,此时液体进入环状腔D的条件是:P>PAE+PA+PCD(其中PAE是使阀膜4在AE处变形提供液体通路的压力;PCD是使阀膜在C1-D处变形提供液体通路的压力,而此时的压力源为P,即入口压力等于互锁压力P=PA1,(除非泵膜在两处间隙没有张力,液体可以通过),而我们设计的泵膜有一定的压力互锁,因此液体在致动器不工作时也不会由于液体入口的加压而使液体自出口直接排出,为此更具安全性,可靠性。 When the liquid inlet 6 sudden high pressure, this pressure will be between the top of the diaphragm to open the AE 4, E enters chamber to the cavity C, but when it tries to open the top of the diaphragm between the C1-D 4, of the liquid inlet met pressure, fluid enters the annular chamber conditions at this time is D: P> PAE + PA + PCD (PAE where the valve film 4 is deformed to provide a liquid pressure in the passage at AE; the PCD is to make the diaphragm at the C1-D pressure modification providing a liquid path, at which point the pressure source is P, i.e. inlet pressure is equal to interlock pressure P = PA1, (except the pump diaphragm in two gap no tension, the liquid can be), we designed the pump membrane has interlocking a certain pressure, the liquid is not discharged directly from the liquid outlet when the actuator does not operate due to the pressurized liquid inlet, for more security, reliability.

该泵的结构简单、设计合理,不仅可使其体积小、成本低、使用寿命长,即使入口6处的流体压力再高,都不可能自动通过泵自出口7流出。 The pump structure is simple, rational design, not only can make small size, low cost, long life, even when the fluid pressure at inlet 6 then high, can not automatically flow out through the outlet 7 from the pump.

上述上泵体3和下泵体5均可采用刚性较大的材料和结构形式。 Said pump 3 and the pump 5 may be a rigid material and a larger structure.

致动器1可以是压电陶瓷或磁致伸缩材料或电磁铁甚至用电机轴上的凸轮压一个弹簧片均可达到其上下运动的目的。 The actuator may be a piezoelectric ceramic or a magnetostrictive material electromagnet or cam motor shaft even a compression spring plate which can move up and down to achieve the purpose.

参见图7-8,为压力互锁原理与一般往复泵原理图。 Referring to FIGS. 7-8, and the general principles of the interlock pressure reciprocating pump principle FIG. 现结合图说明如下:一般往复泵工作原理见图7:当泵室体积变大时,左边的单向阀打开,右边的单向阀关闭。 Now in conjunction with FIG follows: general working principle of a reciprocating pump shown in Figure 7: when the pump chamber volume increases, the check valve is opened to the left, to the right of the check valve closed. 此时液体(或气体)从进液口进入泵室。 At this time, the liquid (or gas) into the pump chamber from the inlet opening. 当泵室体积变小时,液体将左单向阀关闭而冲开右单向阀液体从出液口输出。 When the volume of the pump chamber becomes smaller, the liquid check valve is closed and the left and right impulse to open the check valve out of the liquid from the liquid output port. 这种泵只能单向保护,即当出液口出现较大压力时由于有单向阀的缘故,液体不会从出液口返回到进液口。 This pump is only unidirectional protection, i.e., when greater pressure occurs due to the liquid outlet of a check valve, liquid does not return to the liquid outlet from the inlet opening. 但当进液口压力大于两个单向阀动作力量和出液口压力之和时液体将会从进液口直接到达出液口而形成直通。 However, when the fluid inlet pressure is greater than two and one-way valve operating force and the liquid outlet pressure of the liquid will arrive directly from the inlet port is formed through the liquid outlet.

本专利要解决的就是当进口压力大于出口压力加两单向阀动作力时仍然不会使液体不受泵的控制产生直通。 This patent does not remain to be solved is the control of the liquid from the pump when the inlet pressure is generated through the outlet pressure plus two is greater than the one-way valve operation force. 方法是在右边的单向阀背面加上压力互锁腔,使该阀的动作力受进液口压力的影响。 It is the right one-way valve coupled with the back pressure interlock chamber, so that the operation force of the valve is affected by the inlet port pressure. 也即该阀的动作压力必须大于进液压力才能打开(见图8)。 I.e., the valve operating pressure must be greater than the inlet pressure to open (see FIG. 8).

由图可见,输出阀的打开必须建立在泵内压力大于输入压力的基础上。 Seen from the figure, the outlet valve is open must be based on the pump pressure is greater than the input pressure. 否则无论输入压力变得多大,要想使液体输出,必须克服其自身压力才行。 Otherwise, regardless of the input pressure becomes much, in order to make the liquid output, must overcome its own pressure job. 而克服其自身压力的力量只能由泵的动力源提供。 To overcome the pressure of its own power can only be provided by the power source of the pump.

Claims (13)

1.一种具有双向过压保护功能的微量薄膜泵,主要包括:上、下泵体,其特征在于:一作为动力源的致动器置于一泵膜的上方并带动泵膜作上下往复运动,该泵膜封固于上泵体的开口周缘,且上泵体内至少设有一工作腔室及一与流体出口相通的环状腔,一下泵体内设有一进液腔室及一压力互锁腔室,该进液腔室与一液体入口相通,一阀膜置于上下泵体之间,并在阀膜的适当位置处设有与工作腔室相通的孔。 A micro membrane pump with bidirectional overvoltage protection, including: upper and lower pump body, wherein: as a power source placed above the actuator and driven by a pump membrane pump membrane makes reciprocating moving the pump membrane sealing the opening circumferential edge of the pump body and the pump body is provided with at least one working chamber and an outlet in fluid communication with the annular chamber, at the pump body is provided with a liquid inlet chamber and a pressure interlock chamber, the inlet chamber communicating with a liquid inlet, a valve membrane interposed between the upper and lower pump, and a hole communicating with the working chamber in place of the diaphragm.
2.根据权利要求1所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述具有双向过压保护功能的微量薄膜泵为具有进液阀部与出液阀部且所述进液阀部与出液阀部并列配置的带压力互锁的微量薄膜泵。 The micro membrane pump 1 has a bidirectional overvoltage protection as claimed in claim, wherein: said micro membrane pump has a bidirectional overvoltage protection function having an inlet valve and the liquid valve portion and the inlet portion liquid valve portion and the liquid valve portion arranged in parallel with a micro membrane pump pressure interlock.
3.根据权利要求2所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述上泵体的上表面设有与泵膜相匹配的浅凹槽及设于浅凹槽底面的两个并列的左、右工作腔室(C、C1),并于右腔室(C1)的周围设有下开口的环状腔(D),及与环状腔(D)相连通的一液体出口。 The micro-diaphragm pump 2 to the bidirectional overvoltage protection as claimed in claim, wherein: the upper surface of the pump body is provided with a membrane pump and matches the shallow recess provided in the bottom surface of the shallow recess two parallel left and right working chambers (C, C1), and to the right around the chamber (C1) is provided with an opening at the annular chamber (D), and the annular chamber (D) communicating a liquid outlet.
4.根据权利要求2所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述下泵体的上表面设有两并列的进液腔室(A)及压力互锁腔室(A1),该两腔室底部分别与设于下泵体内的带有液体入口的流道相通,并在进液腔室(A)的周围设有上开口的环状腔(B)。 2 according to the micro-pump having a bidirectional overvoltage protection film as claimed in claim, wherein: the upper surface of the lower pump body is provided with two parallel inlet chamber (A) and a pressure interlock chamber ( A1), the bottom of the two chambers respectively disposed at the liquid inlet in flow communication with the pump body, and an opening provided with an annular chamber (B) around the inlet chamber (a) is.
5.根据权利要求2所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述阀膜是一具有足够弹性、韧性的薄膜,可由耐腐蚀、耐磨的橡胶、塑胶或金属薄膜制成,封固于上、下泵体之间,并可随泵压的变化分别封盖于左、右工作腔室(C、C1),另在相对下泵体的环状腔(B)的适当位置处设有与左工作腔室(C)相通的孔。 2 5. The micro pump has a bidirectional overvoltage protection film according to claim, wherein: said valve is a membrane having a sufficient elasticity, toughness of the film, may be resistant to corrosion, abrasion of rubber, plastic, or metal thin film made to the sealing, between the lower pump, and the pump pressure varies with the closure, respectively to the left and right working chambers (C, C1), the other in the pump body relative to the lower annular chamber (B) is provided at a position communicating hole left working chamber (C).
6.根据权利要求1所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述具有双向过压保护功能的微量薄膜泵为具有进液阀部与出液阀部且所述进液阀部与出液阀部同心配置的带压力互锁微量薄膜泵。 1 according to the micro-pump having a bidirectional overvoltage protection film as claimed in claim, wherein: said micro membrane pump has a bidirectional overvoltage protection function having an inlet valve and the liquid valve portion and the inlet portion and a liquid valve unit with pressurized fluid valve portion arranged concentrically interlocking micro membrane pump.
7.根据权利要求6所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述上泵体中间设有与泵膜相匹配的贯通的上、下工作腔室(C、C1),其工作腔室(C1)的周围设有下开口的环状腔(D),及与环状腔(D)相连通的一液体出口。 6 7. The micro membrane pump with bidirectional overvoltage protection function according to claim, wherein: said pump is provided on the intermediate film and the pump through the match, the working chamber (C, C1) , around which the working chamber (C1) is provided with an opening at the annular chamber (D), a liquid outlet and the annular chamber (D) communicating.
8.根据权利要求6所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述下泵体的中间设有一腔室(E),其周围设有向上开口的进液腔室(A)及压力互锁腔室(A1),该进液腔室(A)与带有液体入口的流道相通。 According to claim 6 having a micro membrane pump bidirectional overvoltage protection claims, characterized in that: said pump is provided with an intermediate chamber (E) which is provided around the inlet chamber opening upwardly ( a) and a pressure interlock chamber (A1), the inlet chamber (a) communicates with the flow channel of the liquid inlet.
9.根据权利要求6所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述阀膜是一具有足够弹性、韧性的薄膜,可由耐腐蚀、耐磨的橡胶、塑胶或金属薄膜制成,相对下泵体腔室(E)的适当位置处设有一与工作腔室(C)相通的孔,封固于上、下泵体之间,并随泵压的变化封盖于工作腔室(C1)。 According to claim 6 having a micro membrane pump bidirectional overvoltage protection claims, characterized in that: said valve is a membrane having a sufficient elasticity, toughness of the film, may be resistant to corrosion, abrasion of rubber, plastic, or metal thin film formed, at an appropriate position relative to the pump chamber (E) is provided with (C) a hole communicating with the working chamber, on the sealing between the pump and the pump pressure varies with the working chamber closure the chamber (C1).
10.根据权利要求1所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述致动器可以是压电陶瓷或磁致伸缩材料或电磁铁、甚至用电机轴上的凸轮压一个弹簧片所构成。 10. The micro membrane pump 1 has a bidirectional overvoltage protection as claimed in claim, wherein: the actuator may be a piezoelectric ceramic or a magnetostrictive material or an electromagnet, and even pressure cam motor shaft a spring piece formed.
11.根据权利要求1~10中任意一项所述具有双向过压保护功能的微量薄膜泵,应用于一医用微量输液泵中。 According to any one of claims bidirectional overvoltage protection function having micro membrane pump 1 to 10, applied to a micro medical infusion pump.
12.根据权利要求11所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述医用微量输液泵为一胰岛素泵。 12. The method of claim 11 micro membrane pump with bidirectional overvoltage protection function, wherein: the medical infusion pump is a micro-insulin pump.
13.根据权利要求11所述具有双向过压保护功能的微量薄膜泵,其特征在于:所述医用微量输液泵为一镇痛泵。 13. The method of claim 11 micro membrane pump with bidirectional overvoltage protection function, wherein: the medical infusion pump is a micro analgesia.
CNB031241824A 2003-05-06 2003-05-06 Micro-thin film pump with double-directional overpressure protection function and application thereof CN1320275C (en)

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