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Throttling assembly, rectifying and flow measuring device

A technology of throttling components and throttling parts, which is applied in the direction of measuring devices, liquid/fluid solid measurement, and measuring capacity, etc., can solve the problems of inability to generate sensitive and clear differential pressure signals, and achieve the goal of reducing requirements, improving accuracy and reliability Effect

Active Publication Date: 2018-07-27
NANJING EXACTRA AUTOMATION CONTROL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although these existing technologies have promoted the development of differential pressure flow measurement devices, none of them can generate sensitive and clear differential pressure signals while stabilizing the flow state, and there is still great room for improvement.

Method used

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  • Throttling assembly, rectifying and flow measuring device
  • Throttling assembly, rectifying and flow measuring device
  • Throttling assembly, rectifying and flow measuring device

Examples

Experimental program
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Effect test

Embodiment 1

[0149] image 3 and 4 Respectively showing a sectional view and a side view of a rectifying and flow measuring device according to a first embodiment of the present invention, Figure 5 and 6 respectively showing a perspective view and a cross-sectional view of a throttle assembly according to a first embodiment of the present invention, Figure 7 A sectional view showing an annular fluid channel of a rectifying and flow measuring device according to a first embodiment of the present invention.

[0150] As shown in the above figures, the rectification and flow measurement device according to the first embodiment of the present invention includes a measuring tube 8 and a throttling assembly arranged in the measuring tube 8 . Wherein, the throttling assembly includes a central throttling piece 2 and a plurality of peripheral throttling pieces 3 . The central throttle 2 is hourglass-shaped and has a cylindrical central portion of equal diameter. The peripheral throttling mem...

Embodiment 2

[0156] Figure 8 and 9 A perspective view and a cross-sectional view of a throttle assembly according to a second embodiment of the present invention are shown, respectively. The difference between the second embodiment and the first embodiment is that a plurality of elliptical through-holes 11 are arranged in the cylindrical middle part of each peripheral throttling member 3 , and these elliptical through-holes 11 are arranged along the peripheral throttling member 3 evenly distributed around the circumference.

Embodiment 3

[0158] Figure 10 shows a cross-sectional view of a rectifying and flow measuring device according to a third embodiment of the present invention, Figure 11 and 12 A perspective view and a cross-sectional view of a throttle assembly according to a third embodiment of the present invention are shown, respectively.

[0159] As shown in the above figures, the rectification and flow measurement device according to the third embodiment of the present invention includes a measuring tube 8 and a throttling assembly arranged in the measuring tube 8 . Wherein, the throttling assembly includes a central throttling piece 2 and a plurality of peripheral throttling pieces 3 . The central throttle 2 is spindle-shaped with a cylindrical middle of equal diameter. The peripheral throttling part 3 is cylindrical, the axial section of its side wall is spindle-shaped, and the peripheral throttling part 3 has a cylindrical middle part with equal diameter, and the side wall of the peripheral th...

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PUM

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Abstract

Provided are a throttling assembly and a rectifying and flow measuring device comprising the throttling assembly. The throttling assembly comprises a central throttling member and multiple peripheralmembers; the central throttling member is sleeved by the multiple peripheral members successively and is coaxial with the peripheral members; annular fluid passages are formed between the central throttling member and adjacent peripheral throttling members and between adjacent peripheral throttling members; in the axial direction of the central throttling member, the annular fluid passages in turncomprises an inlet constriction section, an equal cross-section section, and an outlet expansion section. The invention generates a sensitive and clear differential pressure signal while stabilizingthe flow state, and can improve the accuracy and reliability of the flow measurement.

Description

technical field [0001] The invention relates to the field of flow measurement, in particular to a throttling assembly and a rectifying and flow measuring device comprising the throttling assembly. Background technique [0002] If a throttling member with a flow area smaller than the cross-sectional area of ​​the pipe is placed in a pipe filled with fluid, the fluid bundle in the pipe will have local contraction or flow separation when passing through the throttling member. At the point of constriction or separation, The static pressure will decrease, so there will be a certain pressure difference (also known as differential pressure) before and after the throttle. There is a certain functional relationship between the pressure difference and the flow rate, so the flow rate can be measured by measuring the pressure difference before and after the throttling piece placed in the pipeline. [0003] The existing flow sensor placed in the pipeline using the pressure difference be...

Claims

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Application Information

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IPC IPC(8): G01F1/36G01F1/40G01F15/00F16L55/027
CPCF16L55/02718G01F1/36G01F1/40G01F15/00
Inventor 明晓
Owner NANJING EXACTRA AUTOMATION CONTROL TECH CO LTD