Pressure induction pipe of inserted type averaging pitot tube flowmeter

Abstract

The invention relates to a flow quantity measuring technique, and aims at providing a pressure induction pipe of an inserted type averaging pitot tube flowmeter. The pressure induction pipe is characterized in that a main body of the pressure induction pipe is in a hollow column shape, one end of the main body is sealed, and the other end of the main body is opened; the interior of the pressure induction pipe is separated into a front side total pressure cavity and a back side static pressure cavity by a vertical separating plate, and the walls of the total pressure cavity and the static pressure cavity are respectively provided with a plurality of through holes which are used for inducing fluid pressure of the cavity environments; and the exterior edge of the transverse cross section of the pressure induction pipe is surrounded by two smooth curves, and the connecting part of the two smooth curves is in smooth transition. The pressure induction pipe has the advantages that by designing the exterior edge of the transverse cross section of the pressure induction pipe, the processing technology of a die can be simplified, and the manufacturing cost is reduced; more importantly, the requirement of changing large flow blockage ratio into small flow blockage ratio is met, and the flowing geometric boundary condition for mutual conversion of dynamic pressure and static pressure in the flowing process is provided; and meanwhile, by adopting the walls, the stability of separating points is ensured.

Description

technical field [0001] The invention relates to flow measurement technology, in particular to a pressure introduction tube for an insertion-type equal velocity tube flowmeter. Background technique [0002] High-precision and stable measurement of fluid flow is an important basic data for high-precision control, operation management, and energy-saving and optimized operation of many industries and enterprises. The flow systems involved include ventilation systems, compressed air systems, water systems and steam systems, which are the dynamic core of process industry companies. From the point of view of the overall optimization operation of the process industry, timely and accurate grasp of the flow rate of the fluid medium used by each branch user is an important basis for the realization of on-demand allocation and on-demand supply self-adaptation. [0003] Velocity tube flowmeters, including Annbar, Torbar, Probar, verabar, itabar, etc., are based on the principle of Pitot...

AI Technical Summary

Problems solved by technology

However, the three-stage structure of its shape has the problem that it is difficult to process and form it at one time.

On the other hand, in the actual operation process, in the gas process, because the temperature, pressure and flow parameters are coupled and changed, what the user actually needs is a credible reference basis - the standard flow rate, while the existing uniform velocity tube flowmeter Generally, there is a corresponding difference between the actual working condition flow rate and the user's demand

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