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Seam type laminar flow element

A slot type, component technology, applied in the direction of detecting fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effects, etc., can solve the problems of difficult processing, high cost, unstable gap, etc. The effect of small quantity and stable process

Pending Publication Date: 2019-02-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the processing quality of the inner surface of the capillary and avoid damage to the laminar flow structure, the diameter of the capillary is generally difficult to be less than 0.2mm; too small a capillary diameter will also lead to insufficient rigidity and difficulty in assembly
It is more difficult to roll a laminar flow element with a small flow rate when using corrugated plates
However, the gap formed by stacking stainless steel round rods is unstable, difficult to process, and high in cost

Method used

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  • Seam type laminar flow element
  • Seam type laminar flow element
  • Seam type laminar flow element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: as figure 1 , 2 , 3, a slot-type laminar flow element, including a hollow body 1 and a laminar flow matrix 2 that is interference fit with the hollow body 1, and a fluid is provided between the hollow body 1 and the laminar flow matrix 2 and formed The laminar flow gap 3 in the laminar flow state, the laminar flow gap 3 and the laminar flow matrix 2 are on the same axis. The hollow body 1 is a cube with a square cross-section. In this embodiment, the cross-sectional area of ​​the hollow body 1 is 100mm 2 , the height is 20mm. The laminar flow base 2 is cylindrical, the cross-sectional diameter of the laminar flow base 2 is 5mm, and the height of the laminar flow base is set corresponding to the hollow body, that is, the height of the laminar flow base 2 is 20mm. The laminar flow gap 3 is a laminar flow gap formed along a plane opened on the side wall of the laminar flow substrate 2 and cooperating with the hollow body 1 . The depth of the laminar flow ...

Embodiment 2

[0021] Embodiment 2: as Figure 4 As shown, it is the same as Embodiment 1, except that the laminar flow gap 3 is a laminar flow gap formed along a groove on the side wall of the laminar flow substrate 2 and cooperates with the hollow body 1 . The groove is a U-shaped groove.

Embodiment 3

[0022] Embodiment 3: Same as Embodiment 2, except that the groove is an O-shaped groove.

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Abstract

The invention relates to the field of flow measurement. A seam type laminar flow element comprises a hollow body and a laminar flow base body in interference fit with the hollow body. A laminar flow seam capable of allowing fluid to pass through and forming the laminar flow state is formed between the hollow body and the laminar flow base body. The laminar flow seam and the laminar flow base bodyare located on the same axis. The seam type laminar flow element is simple in structure and comprises a small number of parts; the body and the laminar flow base body are easy to machine, the processis stable, the formed laminar flow is stable, cost is low, and the purpose of designing existing laminar flow elements with the flow of 1L / min or below can be effectively achieved.

Description

technical field [0001] The invention relates to the field of flow measurement. Background technique [0002] A laminar flow element is an element that converts the flow state of a fluid from turbulent to laminar. In the state of laminar flow, the flow pressure loss of the fluid is proportional to the flow velocity. Laminar flow components are mainly used in the field of flow measurement, and are the core components of laminar flow flowmeters and laminar flow controllers. [0003] When designing a laminar flow element, it is necessary to construct some small-sized flow channels, so that the fluid flows through these flow channels to form a laminar flow. At present, laminar flow elements are generally made of capillary tubes. For example, the patent with publication number CN201220237073 discloses a capillary-type laminar flow element. The laminar flow element is composed of stainless steel thin tubes with a diameter of less than 1mm embedded in a cylindrical corrosion-resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/34
CPCG01F1/34
Inventor 王筱庐陈玉春蒋宇翔
Owner NORTHWESTERN POLYTECHNICAL UNIV