Piston system structure for a piston pressure gauge with a non-rotating piston

By using a non-rotating piston system structure and technologies such as driving piston cylinder rotation and ball guide sleeves, the measurement error problem caused by piston rotation is solved, and higher precision pressure measurement is achieved.

CN117419848BActive Publication Date: 2026-07-21XIAN XIDE INSTR CO LTD
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Patent Information

Application Number
CN202311355327.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-18
Publication Date
2026-07-21
Estimated Expiration
2043-10-18

AI Technical Summary

Technical Problem

In existing piston-type pressure gauges, the rotating piston causes fluctuations in measurement error due to the offset of the center of gravity of the weight and insufficient rigidity, making it difficult to achieve accurate measurement.

Method used

The system employs a non-rotating piston system structure. By driving the piston cylinder to rotate and using a ball bearing guide sleeve and a laser rangefinder to maintain the piston's verticality, combined with a motor drive and transmission pulley system, the piston is ensured not to rotate, reducing friction and deformation.

Benefits of technology

It achieves more stable and accurate pressure measurement, reduces measurement errors caused by piston rotation and deflection, and improves the traceability convenience of metrology work.

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Abstract

The application discloses a piston system structure of a non-rotating piston for a piston pressure gauge, and relates to the technical field of pressure measuring devices.The piston system structure comprises a base, a piston cylinder, a driving device, a vertically arranged first piston rod and a hollow second piston rod.The piston cylinder is arranged in the base and rotationally matched with the base.The driving device can drive the piston cylinder to rotate through a transmission mechanism.The bottom end of the first piston rod extends into the piston cylinder and is slidingly matched with the piston cylinder.The top end of the first piston rod is fixedly connected with a piston which is used for being fixedly connected with a weighing tray.The pressure weighing tray is arranged above the base.The second piston rod is fixedly connected with the base, and the top end of the second piston rod extends into the piston cylinder.The bottom end of the second piston rod is communicated with the liquid outlet of a pressure injection device through a pipeline.The piston system structure can effectively avoid the measurement error caused by the deflection of the piston by driving the piston cylinder to rotate and making the piston not rotate.
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