Focusing hole plate flowmeter and using method thereof

Abstract

The invention relates to a focusing hole plate flowmeter, which comprises a hole plate, a front differential pressure transmitter, a rear differential pressure transmitter, a pressure transmitter, a temperature sensor and an on-line flow calculator, wherein the front differential pressure transmitter is arranged on the front end of the hole plate, and measures front and rear differential pressure, the rear differential pressure transmitter is arranged on the rear end of the hole plate, and measures pressure loss value of measured medium after the measured medium passes through the hole plate, the pressure transmitter is arranged on the front end of the hole plate, and measures a pressure value on the front end of the hole plate, the temperature sensor is arranged on the rear end of the hole plate, and the on-line flow calculator is respectively connected with the front differential pressure transmitter, the rear differential pressure transmitter, the pressure transmitter and the temperature sensor. Compared with the prior art, the focusing hole plate flowmeter has the beneficial effects that the focusing hole plate flowmeter can automatically adjust meter factors by adding a pressure measuring point on the rear segment of the hole plate, measuring pressure loss of measured medium and then comparing with a differential pressure value and calculating the change of a differential pressure radio on line.

Description

technical field [0001] The invention relates to the technical field of flow measurement, in particular to a focusing orifice flowmeter and a use method thereof. Background technique [0002] The standard orifice flowmeter is widely used. It is a standard throttling device and needs to be designed, manufactured, installed and used in accordance with the national standard GB / T2624-2006. The standard orifice flowmeter has the advantages of simple structure, good durability, no need for real flow calibration, high degree of standardization and high accuracy, and is widely used in industrial production. The measurement characteristics of the orifice flowmeter depend on the geometric characteristics of the device, and the flow rate has a definite relationship with the differential pressure. [0003] The traditional method regards all variables other than differential pressure as constants, and finally only determines the flow rate by measuring the differential pressure. In this ...

AI Technical Summary

Problems solved by technology

Moisture passing through the differential pressure flowmeter will produce a false high phenomenon, which has always seriously affected the measurement accuracy of the orifice flowmeter

[0007] Therefore, how to solve a series of problems such as the narrow turndown ratio of the standard orifice plate flowmeter, the bluntness of the sharp corner of the orifice plate, the deposition upstream of the orifice plate, and the false height of the moisture measurement is a key point.

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