Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Inner-outer tube type gas flowmeter and flow detecting method

A technology of gas flowmeter and outer tube, which is applied in the direction of volume/mass flow generated by mechanical effects, fluid flow detection by measuring pressure difference, etc., and can solve problems such as narrow range ratio, fluid disturbance, pressure loss, etc.

Active Publication Date: 2017-05-31
HEBEI UNIVERSITY
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some shortcomings that are difficult to overcome. For example, the tail of the V-cone flowmeter is a blunt body structure, and the fluid flow is separated, forming a large number of vortices and causing a large pressure loss; compared with the electromagnetic flowmeter, its range ratio is relatively narrow; The L-shaped cantilever structure may generate vibration when the flow is large
[0007] For the above-mentioned orifice plate, Venturi tube and V-cone flowmeter, the throttling method is realized by changing the total flow area of ​​the fluid, which will inevitably cause disturbance to the fluid itself, and the differential pressure signal will be unstable.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inner-outer tube type gas flowmeter and flow detecting method
  • Inner-outer tube type gas flowmeter and flow detecting method
  • Inner-outer tube type gas flowmeter and flow detecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1, an inner and outer tube gas flow meter.

[0061] Such as figure 1 As shown, the inner and outer tube gas flowmeter provided by the present invention includes an outer tube 1, an inner tube, a bracket, a full-bridge differential structure composed of four strain gauges, a power supply, a signal acquisition and amplification circuit, and a data processing circuit.

[0062] The outer tube 1 is a cylindrical straight tube structure placed horizontally; the inner diameter of the outer tube 1 is represented by D, and the length is represented by L. The inner tube is a throttling part, and the inner tube is arranged in the outer tube 1, and the inner tube is located on the axis of the outer tube 1, that is, the axis of the outer tube 1 coincides with the axis of the inner tube. The length of the inner tube is the same as the length L of the outer tube 1 , and the two ends of the inner tube are respectively aligned with the two ends of the outer tube 1 . The inn...

Embodiment 2

[0082] Embodiment 2, an inner and outer tube type gas flow detection method.

[0083] Such as Figure 1 ~ Figure 2 As shown, the inner and outer tube type gas flow detection method provided by the present invention comprises the following steps:

[0084] a. Set the inner tube on the axis line inside the outer tube 1 .

[0085] The outer tube 1 is a circular straight tube structure placed horizontally. An inner tube is arranged on the axis of the outer tube 1; the inner tube includes a large-diameter tube 2, a shrink tube 3 and a small-diameter tube 4 connected in sequence; the shrink tube 3 has a frusto-conical structure; the large-diameter tube 2 and the small-diameter tube 4 The ends of the tubes are respectively aligned with the two ends of the outer tube 1, that is, the inner tube and the outer tube 1 have the same length. The distance between the outer wall of the large diameter tube 2 and the inner wall of the outer tube 1 is greater than 1 mm. On the same cross-sect...

Embodiment 3

[0106] Example 3, throttling ratio β and contraction angle preferred embodiment of .

[0107] According to the empirical theory and the consideration of the total pipe size, the shrinkage angle of the shrinkage tube Set it as 15°, and then calculate the inner diameter of the large-diameter pipe and the inner diameter of the small-diameter pipe under different throttling ratios, and then carry out the simulation according to the determined structural size at the inlet velocity of 10.27m / s, and obtain the flow rate according to the simulation results Calculate the pressure values ​​at multiple places, specifically: ① Obtain the differential pressure between the inner and outer pipes, ② Obtain the pressure difference between the 10D (D is the inner diameter of the outer pipe) before the inflow end of the outer pipe (or inner pipe) and the 5D behind the outflow end. Pressure difference, this is the pressure loss. The pressure loss ratio is obtained by dividing the pressure los...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Contraction angleaaaaaaaaaa
Login to View More

Abstract

The invention provides an inner-outer tube gas flowmeter and a flow detecting method. According to the inner-outer tube gas flowmeter, an inner tube of which the length is equal to that of an outer tube is arranged inside the outer tube, supports are arranged at the two ends of the inner tube so as to guarantee that in the measuring process, the inner tube is fixed and stays still, and the perturbation phenomenon of the inner tube is reduced; four pressure measuring holes are uniformly formed in the same cross section of the inner tube simultaneously, strain gages with positive stress are embedded into two oppositely-arranged pressure measuring holes, strain gages with negative stress are embedded into the other two pressure measuring holes, and the four strain gages form a full-bridge differential-motion structure, which is equivalent to the function of arranging a pressure sensor in the inner tube. When gas flows, the resistance values of the strain gages change due to strain effects, a voltage is loaded on the strain gages, the voltage value is obtained through signal acquisition and amplified circuit acquisition, the obtained voltage through acquisition reflects differential pressure information between the inner tube and the outer tube, and the flow of gas can be calculated through the differential pressure information. The inner-outer tube gas flowmeter is simple in structure and reasonable in design, and the final measuring result is accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of two-phase flow detection, in particular to an inner and outer tube type gas flow meter and a flow detection method. Background technique [0002] Differential pressure flowmeter is one of the most widely used flowmeters in the measurement of two-phase flow, and it is currently recognized as a flowmeter that can work stably under all flow patterns of two-phase flow. [0003] Differential pressure flowmeters are based on a split-phase or homogeneous model, which establishes the relationship between flow and pressure drop. Among them, the longest research history is the throttling differential pressure flowmeter, and the differential pressure method is basically found in the throttling differential pressure flowmeter. The flowmeter has the advantages of easy installation and reliable operation, and has formed a mature international standard in the course of many years of research. At present, many manufactu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01F1/40
CPCG01F1/40
Inventor 方立德李丹李婷婷李小亭吕晓晖田季吴琼
Owner HEBEI UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com