Venturi tube with adjustable throat diameter for current-limiting test

Abstract

The invention discloses a venturi tube with an adjustable throat channel for a current limiting test. The venturi tube comprises a fluid pipe, annular groove is formed in inner wall, a lantern ring matched with the annular groove is embedded in the annular groove, a cavity ring is clamped between the annular groove and the lantern ring, and the section size of the cavity ring is larger than that of the annular groove. A first radial through hole and a second radial through hole which correspond to each other in position are formed in the pipe wall of the fluid pipe, the ring wall of the lantern ring and the ring wall of the cavity ring; the first radial through hole only penetrates through the ring wall on one side of the cavity ring; the second radial through hole penetrates through the ring walls on the two sides of the cavity ring; a first sleeve and a second sleeve are arranged in the first radial through hole and the second radial through hole, the outer wall of the second sleeveis provided with scales or connected with a displacement sensor, the connecting end between the second sleeve and the annular wall of the cavity ring is connected in a sealed mode, and sealing plugs are arranged between the first sleeve and the pipe wall of the fluid pipe and between the second sleeve and the pipe wall of the fluid pipe. The venturi tube is simple in structure and convenient to measure, and the size of the throat tube of the venturi tube in the tube body can be conveniently adjusted at any time.

Description

technical field [0001] The invention relates to the technical field of Venturi tube structure, in particular to a venturi tube with adjustable throat diameter for flow limiting test. Background technique [0002] For the flow measurement of liquid and gas, by installing a sensor on the pipeline through which the fluid flows, the electrical signal is measured by the sensor, and the electrical signal can reflect the pressure difference of the fluid inside the pipeline, and the flow velocity of the fluid can be calculated through the pressure difference, according to the fluid The relationship between density ρ, flow velocity v, cross-section A and flow Q is: Q=ρ×v×A can obtain flow; due to the limitation of sensor measurement range, the pressure difference Δp that can be sensed is between Δpmin~Δpmax, for The same measuring pipe, flow turndown ratio equal [0003] In actual use scenarios, the range ratio of some flow processes is very large, and a single conventional flow...

AI Technical Summary

Problems solved by technology

If multiple specifications of flow-limiting Venturi tubes are required, the number of test pieces to be produced will be large, which will waste a huge amount of manpower and material resources, and consume a lot of time.

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