Measuring device for sound velocity in middle-high pressure hydraulic pipeline

By designing a sound velocity measurement device for medium and high pressure hydraulic pipelines that includes a drive shaft, rotary valve, and fiber optic grating sensor, the problem of measuring the propagation velocity of liquid pulses in hydraulic pipelines is solved. This enables accurate measurement of pulsating flow and pressure stability in hydraulic systems, and improves the measurement accuracy of noise characteristics of hydraulic components and systems.

CN224202554UActive Publication Date: 2026-05-05WEIFANG JIATENG HYDRAULIC TECH CO LTD
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Patent Information

Application Number
CN202520807403.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-25
Publication Date
2026-05-05
Estimated Expiration
2035-04-25

AI Technical Summary

Technical Problem

In the existing technology, it is difficult to measure the propagation speed of liquid pulses in medium and high pressure hydraulic pipelines, especially the accuracy and stability of sound velocity in oil are difficult to obtain, which affects the measurement accuracy of noise characteristics of hydraulic components and systems.

Method used

A sound velocity measurement device for medium- and high-pressure hydraulic pipelines is adopted, including a drive shaft, a rotary valve, a transition end cap, a hydraulic pipeline, and first and second fiber optic grating sensors. The design of the rotary valve core realizes the injection and recovery of hydraulic oil. Combined with the scanning measurement of hydraulic oil pressure and pulse amplitude by the fiber optic grating sensors, the sound velocity of the oil propagation in the hydraulic pipeline is recorded.

Benefits of technology

It enables precise measurement of liquid pulses in hydraulic lines, provides controllable measurement of the time and period of pulsating flow in hydraulic systems, improves the measurement accuracy of noise characteristics of hydraulic components and systems, eliminates the influence of air bubbles in hydraulic oil, and ensures pressure stability.

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Abstract

The utility model discloses a device for measuring sound velocity in a middle-high pressure hydraulic pipeline, which relates to the technical field of measuring devices and comprises a driving shaft, a rotary valve, a transition end cover, a hydraulic pipeline, a first fiber bragg grating sensor and a second fiber bragg grating sensor. An axial output port of the rotary valve is connected with a transition end cover, and the transition end cover is connected with a hydraulic pipeline; the front end of the hydraulic pipeline is connected with a first fiber grating sensor, and the tail end is connected with a second fiber grating sensor; the rotary valve comprises a valve cover, a valve body, and a rotary valve core and a bearing which are arranged in the valve body; the driving shaft is connected with the rotary valve element, and an explosion flushing cavity and a low-pressure cavity which are isolated from each other are formed in the rotary valve element; the blasting cavity is provided with a first conical nozzle, and the low-pressure cavity is provided with a second conical nozzle; an axial output port of the rotary valve is provided with a third conical nozzle; the transition end cover is provided with a fourth conical nozzle; measurement of the propagation sound velocity of oil in a hydraulic pipeline under a certain pressure is realized.
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