CN106525147A - High precision digital display magnetic ring impeller flowmeter - Google Patents

Abstract

The invention discloses a high precision digital display magnetic ring impeller flowmeter. The overall flowmeter adopts a macromolecular non-magnetic material, wherein an impeller is composed of rubber blades and a magnetic ring, after fluid enters a fluid cavity through a fluid director, the impeller is impacted to produce torque, the magnetic ring rotates, magnetic flux is changed, the rotating speed of the impeller is related to the flow of the fluid, the magnetic flux is related to the rotating speed of the impeller and reflects the flow of the fluid, and the flow of the fluid can be given in a digital display format by virtue of a magnetic induction element and a digital analog module. The high precision digital display magnetic ring impeller flowmeter disclosed by the invention has the characteristics of low power consumption, low flow pulsation, simple structure, high measurement accuracy, digital display and the like.

Description

High-precision digital display magnetic ring impeller flowmeter

technical field

The invention relates to an industrial instrument and meter, which relates to a novel high-precision digital display magnetic ring impeller flowmeter.

Background technique

Flow rate is one of the basic physical quantities that reflect the flow of fluid, and fluid measurement is the science of studying the quality change of substances. It is listed as the three major detection parameters of fluid along with pressure and temperature. For a certain fluid, as long as these three parameters are known, its energy can be calculated. In the industrial field, instruments that measure fluid flow are collectively referred to as flow meters. Flowmeter is one of the most important instruments in industrial measurement. It is widely used in metallurgy, electric power, coal, chemical industry, industrial, transportation, construction, textile, food, medicine, agriculture, environmental protection and people's daily life. All fields of economy are important tools for developing industrial and agricultural production, saving energy, improving product quality, improving economic efficiency and management level, and occupy an important position in the national economy.

At present, there are nearly a hundred kinds of flowmeters that have been put into use. According to their measurement principles, there are: mechanical principles, electrical principles, acoustic principles, thermal principles, optical principles, atomic physics principles and other forms. According to the most extensive and popular classification method at present, it can be divided into: positive displacement flowmeter, differential pressure flowmeter, rotameter, impeller flowmeter, inductance flowmeter, fluid oscillation flowmeter, ultrasonic flowmeter, mass flow meter, insertion flow meter, open channel flow meter and other flow meters.

In recent years, the research of impeller flowmeter has been uninterrupted, developing towards the direction of low power consumption, low pressure difference, high precision, digital display, etc., focusing on the innovation of impeller structure, flow monitoring system and digital secondary instrument.

Contents of the invention

The invention aims at the deficiencies of the prior art, and provides a high-precision impeller flowmeter for measuring flow based on the change of magnetic flux.

The technical scheme adopted in the present invention:

The flowmeter as a whole is made of polymer non-magnetic materials, and the impeller is composed of rubber blades and magnetic rings. When the fluid enters the flow chamber through the deflector, it impacts the impeller to generate torque, the magnetic ring rotates, and the magnetic flux changes. The speed of the impeller and the fluid The flow rate is related. The magnitude of the magnetic flux is related to the impeller speed, which reflects the flow rate of the fluid. Through the magnetic sensing element and the digital analog module, the fluid flow rate can be given in a digital display format.

On the basis of analyzing the development trend and performance characteristics of the impeller flowmeter, the present invention proposes a new low-power consumption digital display high-precision magnetic ring impeller flowmeter, which has the advantages of low power consumption, low flow pulsation, simple structure, and high measurement accuracy. High, digital display and other characteristics, which is undoubtedly of great significance for improving system performance.

Description of drawings

Fig. 1: Schematic diagram of the structure of the present invention;

Figure 2a; Figure 2b: Schematic diagram of the impeller;

Figure 3: Schematic diagram of the deflector;

In the figure: 1-impeller, 2-front deflector, 3-rear deflector, 4-magnetic sensor, 5-analog/digital module, 6-housing, 7-digital display module, 8-magnetic ring , 9-blade, 10-impeller shaft, 11-support hole, 12-guide vane.

detailed description

The principle and structure of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, the measurement structure of this flowmeter consists of a front deflector 2, a rear deflector 3, a casing 6 and an impeller 1, wherein the front deflector 2, the rear deflector 3, and the casing 6 The material is ABS polymer plastic. When the fluid passes through the front deflector 2 and enters the housing 6, the front deflector 2 and the rear deflector 3 can make the fluid generate a stable flow field. The fluid impinges on the impeller 1 to generate torque, causing the impeller 1 to rotate. The rotation of impeller 1 causes the magnetic field to change. The magnitude of the magnetic flux is related to the flow rate of the fluid. The magnitude of the magnetic flux is measured by the magnetic sensor 4 and passes through the analog/digital module 5 and the digital quantity display module 7, so that the flow rate of the fluid can be given as a digital quantity.

As shown in FIG. 2 a and FIG. 2 b , the impeller 1 of the flowmeter is mainly composed of a magnetic ring 8 , blades 9 and an impeller shaft 10 . The material of the blade 9 is rubber, and the material of the impeller shaft is ABS. When the impeller 1 rotates, the rotation of the magnetic ring 8 causes the magnetic field to change, and the magnitude of the magnetic flux is related to the fluid flow.

As shown in Figure 3, this figure is a schematic diagram of the front deflector 2 and the rear deflector 3, the material of the front deflector 2 and the rear deflector 3 is ABS plastic, and the guide vane 12 and the support hole 11 Composition, the seat hole 11 is used to fix the impeller 1. The front deflector 2 and the rear deflector 3 are staggered at a certain angle, which can stabilize the flow field of the fluid.

Claims (2)

1. high-precision digital-display magnet ring propeller flowmeter, including front air deflector, rear air deflector, housing and impeller, the two ends point of housing Front air deflector and rear air deflector for stabilized fluid flow field is not provided with, housing is built with impeller, it is characterised in that：Impeller Rotation causes changes of magnetic field, measures magnetic flux size by feeling Magnetic Sensor, and shows through analog/digital module and digital quantity Module, the flow of fluid is given with digital quantity.

2. high-precision digital-display magnet ring propeller flowmeter according to claim 1, it is characterised in that：Described impeller mainly by Magnet ring, blade and impeller axle composition；The material of blade is rubber, and the material of impeller axle is ABS, after wheel rotation, magnet ring Rotation causes changes of magnetic field, and the size of magnetic flux is related with fluid flow.