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公开(公告)号：US4787253A
公开(公告)日：1988-11-29
申请号：US67927
申请日：1987-06-29
摘要： A flow meter having electrical signal outputs and a digital display is described. A transducer uses a magnet inside the flow meter to position a ball on a resistor bar and a contact bar and, thus, generate a position signal. The position signal provides an accurate electrical indication of flow to the circuitry driving the display.
摘要翻译： 描述具有电信号输出和数字显示的流量计。 传感器使用流量计内的磁体将球定位在电阻棒和接触杆上，从而产生位置信号。 位置信号提供对驱动显示器的电路的精确电流指示。
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公开(公告)号：US4500759A
公开(公告)日：1985-02-19
申请号：US536694
申请日：1983-09-28
IPC分类号： H01H35/40
CPC分类号： H01H35/405
摘要： A flow switch is disclosed comprising a body member having a fluid inlet and a fluid outlet defined therein. An outer core tube is disposed within the body member and has a first and a second end. An inner core tube is disposed coaxial to and within the outer core tube and has a first and a second end with the first ends of the inner and outer core tubes being disposed adjacent the fluid inlet. One of the inner and outer core tubes being in fluid communication with the fluid inlet. The body member defines a body flow path between the outer core tube and the body member and in fluid communication with the fluid outlet. A first aperture is defined by the inner core tube and a second aperture is defined by the outer core tube. Securing means secures one of the core tubes to be non-rotatable relative to the body member. The other of the core tubes is rotatable relative to the body member enabling the first aperture to register with the second aperture for defining a first orifice of variable size to provide a variable flow path from the fluid inlet to the body flow path and to the fluid outlet in accordance with the relative rotational position between the inner and outer core tubes. A cylindrical chamber is defined by the rotatable core tube. A piston is slidably disposed in the cylindrical chamber for movement in accordance with the fluid flow through the fluid inlet. A switch is disposed proximate the piston for providing a switching output in response to the fluid flow through the fluid inlet exceeding a preselected level.
摘要翻译： 公开了一种流量开关，其包括具有限定在其中的流体入口和流体出口的本体构件。 外芯管设置在主体构件内并且具有第一端和第二端。 内芯管同轴设置在外芯管内并具有第一和第二端，内芯管和外芯管的第一端邻近流体入口设置。 内芯管和外芯管中的一个与流体入口流体连通。 主体构件限定了在外芯管和主体构件之间并与流体出口流体连通的主体流动路径。 第一孔由内芯管限定，第二孔由外芯管限定。 固定装置将芯管中的一个固定成相对于主体构件是不可旋转的。 核心管中的另一个可相对于本体构件旋转，使得第一孔能够与第二孔对准，用于限定可变尺寸的第一孔，以提供从流体入口到身体流动路径和流体的可变流动路径 根据内芯管和外芯管之间的相对旋转位置排出。 圆筒形腔由可旋转的芯管限定。 活塞可滑动地设置在圆柱形腔室中，用于根据通过流体入口的流体流动而移动。 开关设置在活塞附近，以响应于流过流体入口的流体超过预选的水平来提供开关输出。
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公开(公告)号：US4489614A
公开(公告)日：1984-12-25
申请号：US444976
申请日：1982-11-29
CPC分类号： G01F1/24
摘要： A flowmeter for measuring the flow rate of a liquid or gaseous media is disclosed. The flowmeter comprises a body portion including an inlet and an outlet. A fluid path extends between the inlet and the outlet. A core tube is disposed vertically within the body portion and a recessed groove is defined by the core tube. The groove extends longitudinally relative to the core tube and a first piston is movably disposed within the core tube and disposed adjacent the groove. A cross sectional area of the fluid path is defined by the groove and the first piston, the cross sectional area of the fluid path being variably dependent upon the longitudinal disposition of the first piston relative to the groove. A cover tube is disposed adjacent the body portion and in fluid communication with the fluid path. A second piston is disposed within the cover tube and is connected to the first piston by a connecting means enabling the first and second pistons to move in unison. A first and a second side of the second piston are immersed in a static fluid enabling controlled damping of the first piston and an indicator cooperating with the second piston indicates the position thereof relative to the cover tube. An embodiment is disclosed for measuring gaseous flow in which the indicator is operative within a range dependent upon the buoyancy of the connecting means immersed in the static fluid.
摘要翻译： 公开了一种用于测量液体或气体介质的流量的流量计。 该流量计包括一个包括入口和出口的主体部分。 流体路径在入口和出口之间延伸。 芯管垂直设置在主体部分内，凹槽由芯管限定。 槽相对于芯管纵向延伸，并且第一活塞可移动地设置在芯管内并邻近凹槽设置。 流体路径的横截面由凹槽和第一活塞限定，流体路径的横截面积可变地取决于第一活塞相对于凹槽的纵向布置。 盖管邻近主体部分设置并与流体路径流体连通。 第二活塞设置在盖管内并且通过使第一和第二活塞能够一致地移动的连接装置连接到第一活塞。 第二活塞的第一和第二侧被浸入静态流体中，从而能够控制第一活塞的阻尼，并且与第二活塞配合的指示器指示其相对于盖管的位置。 公开了一种用于测量气体流量的实施例，其中指示器在取决于浸入静态流体中的连接装置的浮力的范围内操作。
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公开(公告)号：US4361051A
公开(公告)日：1982-11-30
申请号：US208630
申请日：1980-11-20
IPC分类号： G01F1/24
CPC分类号： G01F1/24
摘要： An improved flowmeter is disclosed for measuring the flow rate of a fluid such as a gas or a liquid. The flowmeter comprises a body portion including a fluid inlet and a fluid outlet. A core tube is vertically disposed within the body portion to be in fluid communication with the fluid inlet. A tapered recessed groove extends along the core tube to provide a fluid path adjacent the core tube in fluid communication with at least the fluid outlet of the body portion. A piston is located within the core tube to expose a variable amount of the tapered recessed groove to the fluid inlet upon movement of the piston within the core tube. The fluid flow moves the piston relative to the recessed groove to an equilibrium position determined by a single cross-sectional area of the tapered recessed groove for a given flow. Means are provided for indicating the position of the piston for determining the volumetric flow rate of the fluid.
摘要翻译： 公开了一种用于测量诸如气体或液体的流体的流量的改进的流量计。 流量计包括主体部分，其包括流体入口和流体出口。 芯管垂直设置在主体部分内以与流体入口流体连通。 锥形凹槽沿着芯管延伸，以提供与芯管相邻的流体路径，其与至少主体部分的流体出口流体连通。 活塞位于芯管内，以在活塞在芯管内移动时将可变量的锥形凹槽暴露于流体入口。 流体流将活塞相对于凹槽移动到由给定流量的锥形凹槽的单个横截面面积确定的平衡位置。 提供了用于指示用于确定流体的体积流量的活塞的位置的装置。
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