公开(公告)号：US11703401B2

公开(公告)日：2023-07-18

申请号：US17253632

申请日：2020-05-12

Applicant: ZHEJIANG UNIVERSITY

Inventor： Jinyuan Qian ,  Congwei Hou ,  Juan Mu ,  Zhijiang Jin

IPC: G01L1/08 ,  G01M1/14

CPC classification number: G01L1/083 ,  G01M1/14

Abstract: Provided are a device and a measuring method for measuring an unbalanced moment on a bottom surface of a circular valve core. The device includes a diverging shaped tube, a water tank, a transparent tube, spring dynamometers, laser sources, a circular valve core, and a high-speed camera with a camera stand. Inner shackles and the laser sources are evenly distributed on an outer side of the circular valve core of the device, the spring dynamometers are connected with the inner shackles and with the outer shackles evenly distributed on an inner wall of the transparent tube. The method records an unbalanced state of the circular valve core under an impact of water flow from different orientations with the high-speed camera on the camera stand, the location of the laser point on the outer wall and a tension force of the spring dynamometer are read to calculate a torque of the circular valve core.

公开(公告)号：US11353138B1

公开(公告)日：2022-06-07

申请号：US17253627

申请日：2020-05-12

Applicant: ZHEJIANG UNIVERSITY

Inventor： Jinyuan Qian ,  Juan Mu ,  Congwei Hou ,  Zhijiang Jin

IPC: F16K39/02 ,  F16K1/54 ,  F16K1/36

Abstract: Provided are a piston valve core structure with a combination of a rigid ring surface and a flexible base surface, and a method thereof. The structure includes a piston valve core, a flexible base surface, a rigid ring surface and a connecting member; a bottom surface of the piston valve core is planar; a top surface of the flexible base surface fits to the piston valve core, and a bottom surface thereof is a ellipsoidal convex surface; the rigid ring surface is a ring body with a stepped cross-section, and is coaxially arranged under the flexible base surface; a protruding height of the flexible base surface is greater than that of the rigid ring surface; the connecting member is configured to connect respective structures. The piston valve core structure can overcome unbalanced moment on the valve core, has a simple structure, and can be widely promoted and applied.