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    • 3. 发明授权
    • Method and apparatus for measuring the tensile strength of powders
    • 用于测量粉末抗拉强度的方法和装置
    • US5386731A
    • 1995-02-07
    • US149130
    • 1993-11-05
    • Duane H. PontiusTodd R. Snyder
    • Duane H. PontiusTodd R. Snyder
    • G01N3/00G01N3/56G01N15/00G01N33/00G01N3/08
    • G01N3/565G01N15/00G01N2033/0091G01N2203/0017G01N2203/005G01N2203/0087
    • A method and apparatus for measuring the tensile strength of aggregate material comprising a device in which a layer of dust is applied to a metal electrode, and an electric field is applied in such a way as to induce a charge (negative or positive) on the outer surface of the dust layer. The electric field is then increased until particles break away from the upper surface as a result of the electrostatic force acting on the induced charge. From the balance of forces between the electrostatic (which is easily calculated from the configuration and applied voltage) and the cohesive attraction between the particles, the tensile force of the dust layer is determined. The breakaway point may be observed directly, or it may be detected by a photoelectric device designed to respond to light scattered by the particles as they are lofted from the surface. Alternatively, the breakaway point may be detected by sensing an electric current concomitant with the ejection of surface charge residing in the lofted particles.
    • 一种用于测量聚集体材料的拉伸强度的方法和装置,包括其中将灰尘层施加到金属电极的装置,并且以这样的方式施加电场,以在所述装置上引入电荷(负或正) 粉尘层的外表面。 然后由于作用在感应电荷上的静电力,电场增加直到颗粒从上表面脱离。 从静电(容易从配置和施加电压计算)与颗粒之间的内聚吸引力之间的力的平衡,确定了粉尘层的拉伸力。 可以直接观察分离点,或者可以通过设计成响应于颗粒从表面放出的散射的光的光电装置来检测。 或者,可以通过感测电流来检测分离点,伴随着位于放样颗粒中的表面电荷的喷射。
    • 6. 发明授权
    • Full flow mechanical failsafe
    • 全流动机械故障安全
    • US06656254B1
    • 2003-12-02
    • US10070811
    • 2002-06-25
    • Todd R. Snyder
    • Todd R. Snyder
    • B01D4642
    • B01D46/0089B01D35/147B01D46/0086B01D46/0095F16K17/28Y10T137/7727Y10T137/7785
    • A full-flow mechanical failsafe (100) is composed of a cylindrical shell (101) having a movable sealing plug (105) therein, for attachment to a filter element (110) of a fluid filtering system, such as a gas clean up system in a power plant. The sealing plug (105) rests on locking spheres (107) within the shell (101) during normal operation. Upon filter failure or breakage, the flow fluid will be substantially increased, causing an increase in upward pressure against the sealing plug (105), forcing it upward off the spheres (107) and into sealing contact with a flow aperture (102, 103), shutting off fluid flow. The spheres (107) move downward into a locking position upon movement of the sealing plug (105), to secure the sealing plug (105) in its upward sealing position. The failsafe (100) can be used in fluid flow control systems other than fluid filtering systems, such as oil or gas pipelines, and can be used to prevent improper reverse fluid flow.
    • 全流量机械故障保护(100)由其中具有可移动密封塞(105)的圆柱形壳体(101)组成,用于附接到流体过滤系统的过滤元件(110),例如气体净化系统 在发电厂。 在正常操作期间,密封塞(105)靠在外壳(101)内的锁定球体(107)上。 当过滤器故障或破裂时,流体流体将大大增加,导致对密封塞(105)的向上压力增加,迫使其向上离开球体(107)并与流动孔(102,103)密封接触, ,关闭流体流动。 当密封塞(105)移动时,球体(107)向下移动到锁定位置,以将密封塞(105)固定在其向上的密封位置。 故障保护(100)可用于流体过滤系统以外的流体流量控制系统,例如石油或天然气管道,可用于防止不正确的反向流体流动。