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公开(公告)号：US4852466A
公开(公告)日：1989-08-01
申请号：US50167
申请日：1987-05-15
CPC分类号： G01L7/082
摘要： Floating the diaphragm portion of a diaphragm sensor in the pressurizing fluid frees the diaphragm from exterior housing forces, and makes overall manufacture and replacement inexpensive. A diaphragm can be protected from exterior stress by interspersing a channel between the diaphragm edge and the closure and support structure of an enclosing housing. By extending the channel and incorporating an adequate seal, the diaphragm structure may be made replaceable. The replaceable diaphragm further allows use of a smaller amount of costly materials, and makes repair less costly.
摘要翻译： 将隔膜传感器的隔膜部分浮动在加压流体中可以使隔膜从外部外壳力释放，并使整体制造和更换成本低廉。 可以通过在隔膜边缘与封闭件之间的通道和包围壳体的支撑结构间隔开通道来保护隔膜免受外部应力。 通过延伸通道并结合适当的密封，可以使隔膜结构可更换。 可替换的隔膜进一步允许使用较少量的昂贵的材料，并使维修成本更低。
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公开(公告)号：US5146793A
公开(公告)日：1992-09-15
申请号：US418103
申请日：1989-10-06
CPC分类号： G01N30/18 , F16J15/3204 , G01N35/1079
摘要： A sealing means is provided that may be used, among other things, for sample injection apparatus used in liquid chromatography. The seal includes a jacket having a central bore through which a hypodermic needle containing a sample is inserted. The jacket includes a U-shaped cross section having an inner axial surface and an outer axial surface. Metal cylindrical bands which function as springs are positioned tightly against the inner and outer axial surfaces respectively. Each band has a slot extending through its thickness and along its entire axial length.
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公开(公告)号：US5114161A
公开(公告)日：1992-05-19
申请号：US661782
申请日：1991-03-20
CPC分类号： G01N30/18 , F16J15/3204 , G01N35/1079
摘要： A sealing means is provided that may be used, among other things, for sample injection apparatus used in liquid chromatography. The seal includes a jacket having a central bore through which a hypodermic needle containing a sample is inserted. The jacket includes a U-shaped cross section having an inner axial surface and an outer axial surface. Metal cylindrical bands which function as springs are positioned tightly against the inner and outer axial surfaces respectively. Each band has a slot extending through its thickness and along its entire axial length.
摘要翻译： 提供了一种密封装置，其可以用于液相色谱中使用的样品注射装置。 密封件包括具有中心孔的护套，通过该护套插入含有样品的皮下注射针。 护套包括具有内轴向表面和外轴向表面的U形横截面。 用作弹簧的金属圆柱带分别紧密地定位在内和外轴向表面上。 每个带具有延伸穿过其厚度并沿其整个轴向长度的槽。
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公开(公告)号：US4520678A
公开(公告)日：1985-06-04
申请号：US531561
申请日：1983-09-13
IPC分类号： G01F1/32
CPC分类号： G01F1/3254
摘要： A small line-size vortex meter comprising a small-diameter flow tube cast with an integral vortex-shedding bar and an external sensor housing. The outer surface of the housing is formed with an approximately circular recess extending towards the flow tube and communicating with the interior of the tube through side-by-side impulse ports located adjacent one end of the vortex-shedding bar. Inserted into the central region of the recess is a sensor body having diaphragms on opposite sides to respond to vortex pressure fluctuations transmitted through the impulse ports to chambers along the sides of the sensor body. The sensor body comprises an oil-filled capsule with the diaphragms serving to transmit the pressure fluctuations to a piezo-electric sensor element which produces corresponding electrical signals.
摘要翻译： 一种小型直径的流量计，其包括一个具有一体式涡流脱落杆和一个外部传感器外壳的小直径流量管。 壳体的外表面形成有大致圆形的凹槽，该凹槽朝着流动管延伸，并且通过与涡流脱落杆的一端相邻的并排脉冲端口与管的内部连通。 插入到凹部的中心区域中的传感器主体具有在相对侧上的隔膜，以响应通过脉冲端口传递的涡流压力波动，沿着传感器主体的侧面。 传感器主体包括一个充满油的胶囊，其中隔膜用于将压力波动传递到产生相应电信号的压电传感器元件。
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公开(公告)号：US5065611A
公开(公告)日：1991-11-19
申请号：US394013
申请日：1989-08-15
IPC分类号： G01L27/00
CPC分类号： G01L27/005
摘要： A differential pressure measuring system comprising a transmitter for a pressure-measuring instrument connected to a control room by a two-wire transmission line carrying a d-c signal powered from the control room and representing the measured pressure. The instrument includes a reference pressure device of the falling-ball type, wherein a ball is first lifted to an upper position and then allowed to descend under the force of gravity to produce a reference pressure pulse for calibrating the instrument span. The lifting device for the ball is a two-coil magnetic actuator powered by current from the two-wire transmission line, and is operable at a sufficiently low current to be classified intrinsically safe. The reference pressure device is supported by an adjustable mounting providing two degrees of freedom for movement so as to permit ready adjustment of the device orientation to assure alignment with the force of gravity.
摘要翻译： 一种差压测量系统，包括用于通过承载从控制室供电的d-c信号并表示测量的压力的双线传输线连接到控制室的压力测量仪的发射器。 仪器包括落球式的参考压力装置，其中首先将球提升到上部位置，然后在重力作用下允许其下降以产生用于校准仪器跨度的参考压力脉冲。 用于球的提升装置是由来自双线传输线的电流供电的双线圈磁致动器，并且在足够低的电流下可操作地被分类为本质安全。 参考压力装置由可调节的安装支撑，提供两个自由度的运动，以便允许准备好调整装置方向以确保与重力的对准。
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公开(公告)号：US09207140B2
公开(公告)日：2015-12-08
申请号：US13883043
申请日：2011-11-03
申请人： George E. Sgourakes
发明人： George E. Sgourakes
CPC分类号： G01L13/025 , G01L9/0072 , G01L9/0073 , G01L15/00 , G01L19/0015 , G01L19/02
摘要： The present invention provides a dual sensor differential pressure transmitter with a single fill fluid volume that intrinsically eliminates process and environmental performance influences, increases signal level while substantially reducing product costs.
摘要翻译： 本发明提供了具有单一填充流体体积的双传感器差压变送器，其本质上消除了过程和环境性能的影响，增加了信号水平，同时显着降低了产品成本。
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公开(公告)号：US20130068036A1
公开(公告)日：2013-03-21
申请号：US13583080
申请日：2011-03-18
申请人： George E. Sgourakes
发明人： George E. Sgourakes
IPC分类号： G01F1/32
CPC分类号： G01F1/3209 , G01F1/3245
摘要： A vortex flow meter that senses the alternating pressure variations generated by a fixed vortex shedding generator. The alternating pressure variations of the vortices within the rows on each side of the vortex shedding generator act upon flexible elements producing forces on long columns that are transmitted to remotely located piezoelectric force sensors. The alternating forces upon the two columns are used to determine the passage of a vortex and thereby the flow. Improved output signal by minimizing loss of parasitic energy. 97% of the available signal is applied to the piezoelectric force sensors as compared to conventional 60%. Process influences such as vibration in all planes and pumping pulsations are equal and opposing and are rejected by the sensor. A capability of operating at extreme process temperatures is assured for the high temperature of the process is dissipated to the environment along the long columns. Reliability of operation is assured for the sensor has no process seals and is easily replaced by technicians, without interrupting flow or venting process. Improved process containment is realized with construction having a high safety factor and multiple stages of process containment. Wafer form reduces installation costs and an optional redundant sensor improves reliability of operation, decreases pumping losses, and only requires one K-factor. Process up-time is assured with an economical redundant sensor.
摘要翻译： 一种涡流流量计，用于检测由固定的涡流脱落发生器产生的交变压力变化。 在涡流脱落发生器的每一侧的行内的涡流的交替压力变化作用在柔性元件上，在长柱上产生传递到远位的压电力传感器的力。 使用两列上的交替力来确定涡流的通过，从而确定流动。 通过最小化寄生能量的损失来改善输出信号。 与传统的60％相比，97％的可用信号被应用于压电力传感器。 过程影响如所有平面中的振动和泵送脉动是相等和相反的，并被传感器拒绝。 确保在极端工艺温度下运行的能力，因为该过程的高温被消散到沿长柱的环境中。 确保操作的可靠性，传感器没有过程密封，并且易于技术人员更换，而不会中断流量或排气过程。 改进的过程控制是通过具有高安全系数和多级过程控制的结构来实现的。 晶圆形式降低了安装成本，可选的冗余传感器提高了操作的可靠性，降低了泵浦损耗，并且只需要一个K因子。 使用经济的冗余传感器确保加工正常运行时间。
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公开(公告)号：US5641270A
公开(公告)日：1997-06-24
申请号：US509472
申请日：1995-07-31
CPC分类号： G01N30/32 , F04B17/04 , F04B43/04 , F04B49/065 , G01N2030/027 , G01N2030/326
摘要： A magnetostrictive pump is provided which makes use of a magnetostrictive element which, when an alternating magnetic field is applied to it, compresses a chamber containing a working fluid. A bellows located within the working fluid is repeatedly compressed by the compression of the chamber, and pumps a fluid to be pumped in and out of the bellows. Since the magnetostrictive element does not directly contact the bellows, the bellows life is greatly extended. Valves are provided to direct the fluid flow in a desired manner. The pump may be combined with other pumps in various series or parallel arrangements to create a pump system. The pump may be pre-biased to make its response more linear by either mechanical or magnetic biasing. A permanent magnet may be used to magnetically bias the pump and create an "at-rest" initial extension of the magnetostrictive element. Similarly, a spring may be used to mechanically load the magnetostrictive element. A controller is used to detect feedback signals from pressure and pump displacement transducers, and thereby provide active control of the pump or pump system. It is especially useful for high performance liquid chromatography.
摘要翻译： 提供了一种利用磁致伸缩元件的磁致伸缩泵，该磁致伸缩元件当施加交变磁场时，压缩包含工作流体的腔室。 位于工作流体内的波纹管通过腔室的压缩被反复压缩，并将要泵入的流体泵入和流出波纹管。 由于磁致伸缩元件不直接接触波纹管，因此波纹管寿命大大延长。 提供阀以以期望的方式引导流体流动。 泵可以与各种串联或并联装置的其它泵组合以产生泵系统。 泵可以被预偏置以通过机械或磁偏置使其响应更线性。 可以使用永磁体来磁偏置泵并产生磁致伸缩元件的“静止”初始延伸。 类似地，可以使用弹簧来机械地加载磁致伸缩元件。 控制器用于检测来自压力和泵位移传感器的反馈信号，从而提供泵或泵系统的主动控制。 它对高效液相色谱特别有用。
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公开(公告)号：US4380935A
公开(公告)日：1983-04-26
申请号：US236416
申请日：1981-02-20
CPC分类号： G01P5/01
摘要： A vortex-sensing fluid flowmeter has a freely rotatable vortex-shedding body suspended in a section of conduit through which a fluid stream passes, the body being oriented generally transverse to the direction of fluid flow. The body has an integrally formed upstream-facing portion adapted to shed a series of vortices within the fluid, which vortices alternately influence opposite lateral faces of the body, tending to produce a periodic rotation of the body about a firmly attached rotational shaft. The shaft is rotatably mounted to the conduit and passes at one end through the wall of the conduit to the exterior thereof. A sleeve-like tube surrounds the shaft and is fastened tightly at its bottom end to the shaft and at its top end to the conduit wall to provide a fluid-tight seal around the shaft. The tube is sufficiently flexible and pliable to exert negligible restraining force against the rotation of the shaft. A sensing device located outside of the fluid stream and coupled to the externally protruding portion of the shaft exerts a predetermined restraint on the shaft. This restraint limits the maximum rotation of the shaft at high flow rates, for minimizing the fatiguing stress exerted on the sealing tube, yet does not impede rotation at low flow rates. The sensing device responds to the restrained rotations of the shaft, and electronic circuitry associated with the sensing device converts the response to a signal output indicative of the flow rate of the fluid.
摘要翻译： 涡流感测流体流量计具有悬挂在流体流通过的管道部分中的可自由旋转的涡流脱落体，主体通常横向于流体流动的方向定向。 主体具有整体形成的上游侧部分，其适于在流体内流出一系列涡流，涡流交替地影响身体的相对侧面，倾向于产生身体围绕牢固附着的旋转轴的周期性旋转。 轴可旋转地安装到导管，并且一端通过导管的壁到达其外部。 套筒状的管围绕轴并且紧密地紧固在其底端处于轴并且在其顶端紧固到导管壁以提供围绕轴的流体密封的密封。 该管具有足够的柔性和柔韧性，以抵抗轴的旋转施加可忽略的约束力。 位于流体流外部并耦合到轴的外部突出部分的感测装置在轴上施加预定的约束。 这种约束限制了轴在高流速下的最大旋转，以最小化施加在密封管上的疲劳应力，但不会妨碍在低流速下的旋转。 感测装置响应于轴的受限制的旋转，并且与感测装置相关联的电子电路将响应转换成指示流体的流速的信号输出。
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公开(公告)号：US08844372B2
公开(公告)日：2014-09-30
申请号：US13583080
申请日：2011-03-18
申请人： George E. Sgourakes
发明人： George E. Sgourakes
CPC分类号： G01F1/3209 , G01F1/3245
摘要： A vortex flow meter that senses the alternating pressure variations generated by a fixed vortex shedding generator. The alternating pressure variations of the vortices within the rows on each side of the vortex shedding generator act upon flexible elements producing forces on long columns that are transmitted to remotely located piezoelectric force sensors. The alternating forces upon the two columns are used to determine the passage of a vortex and thereby the flow. Improved output signal by minimizing loss of parasitic energy. 97% of the available signal is applied to the piezoelectric force sensors as compared to conventional 60%. Process influences such as vibration in all planes and pumping pulsations are equal and opposing and are rejected by the sensor. A capability of operating at extreme process temperatures is assured for the high temperature of the process is dissipated to the environment along the long columns. Reliability of operation is assured for the sensor has no process seals and is easily replaced by technicians, without interrupting flow or venting process. Improved process containment is realized with construction having a high safety factor and multiple stages of process containment. Wafer form reduces installation costs and an optional redundant sensor improves reliability of operation, decreases pumping losses, and only requires one K-factor. Process up-time is assured with an economical redundant sensor.
摘要翻译： 一种涡流流量计，用于检测由固定的涡流脱落发生器产生的交变压力变化。 在涡流脱落发生器的每一侧的行内的涡流的交替压力变化作用在柔性元件上，在长柱上产生传递到远位的压电力传感器的力。 使用两列上的交替力来确定涡流的通过，从而确定流动。 通过最小化寄生能量的损失来改善输出信号。 与传统的60％相比，97％的可用信号被应用于压电力传感器。 过程影响如所有平面中的振动和泵送脉动是相等和相反的，并被传感器拒绝。 确保在极端工艺温度下运行的能力，因为该过程的高温被消散到沿长柱的环境中。 确保操作的可靠性，传感器没有过程密封，并且易于技术人员更换，而不会中断流量或排气过程。 改进的过程控制是通过具有高安全系数和多级过程控制的结构来实现的。 晶圆形式降低了安装成本，可选的冗余传感器提高了操作的可靠性，降低了泵浦损耗，并且只需要一个K因子。 使用经济的冗余传感器确保加工正常运行时间。
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