Star-shaped distribution oval inlet seven-hole flow meter
A flowmeter and inlet technology, which is applied to the volume/mass flow generated by mechanical effects, the detection of fluid flow by measuring the pressure difference, and the prevention of damage to volume instruments. Accurate, narrow measurement range and other issues, to achieve the effect of safety and flow measurement accuracy and stability improvement, short straight pipe section, and strong applicability
Inactive Publication Date: 2020-08-28
银川融神威自动化仪表厂(有限公司)
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Problems solved by technology
[0003] However, among the existing throttling differential pressure flowmeters, the application of throttling devices such as orifice plates, nozzles, and Venturi tubes is the most typical, but there are serious defects in their measurement performance, such as the measurement range (turndown ratio) Narrow, the throat of the throttling piece is easy to wear and cause the change of the flow velocity section, resulting in inaccurate flow measurement
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[0017] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.
[0018] Embodiments of the present patent are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are only used for explaining the patent, and should not be construed as limiting the patent.
[0019] see Figure 1-3 , in an embodiment of the present invention, a seven-hole flowmeter with a star-shaped distribution ellipse inlet includes a measuring tube 1, one end of the measuring tube 1 is provided with a high-pressure connecting pipe seat 2, and one side of the high-pressure connecting pipe seat 2 is provided with a low-pressure Connecting tube base 3, the high-pressure connecting tube base 2 and the low-p...
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The invention relates to the technical field of fluid measurement automation instruments,in particular to a star-shaped distribution oval inlet seven-hole flowmeter. The meter comprises a measuring pipe, and a high-pressure connecting pipe seat is arranged at one end of the measuring pipe; a low-pressure connecting pipe seat is arranged on one side of the high-pressure connecting pipe seat; the high-pressure connecting pipe seat and the low-pressure connecting pipe seat are respectively provided with a high-pressure pipe and a low-pressure pipe; the high-pressure pipe and the low-pressure pipeare communicated with the measuring pipe; a throttling element is arranged in the measuring pipe and fixedly connected with the measuring pipe through a pin, and the throttling element of the star-shaped distribution oval inlet seven-hole flowmeter is of a disc type oval inlet seven-hole structure, so that the measuring range ratio is widened, a straight pipe section needed by accurate measurement is shortened, and safety, flow measuring accuracy and stability are improved. Meanwhile, the straight line lengths of the oval inlet and the throat of the throttling element are increased, the throttling area change caused by throat abrasion is avoided, and the purpose that the flow is accurately measured and kept unchanged for a long time is achieved.
Description
technical field [0001] The invention relates to the technical field of fluid measurement automation instruments, in particular to a seven-hole flowmeter with a star distribution ellipse inlet. Background technique [0002] Differential pressure flowmeter is an instrument that measures flow according to the differential pressure generated by the flow detection part installed in the pipeline, the known fluid conditions and the geometric dimensions of the detection part and the pipeline. It mainly includes the detection part as the primary device and the differential pressure conversion and flow display instrument as the secondary device. At present, the most widely used type of flowmeter is the differential pressure flowmeter whose detection part works on the principle of throttling. Since the aperture of the throttling part is smaller than the inner diameter of the pipe, when the fluid flows through the throttling part, the flow velocity cross section suddenly Contraction, t...
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Login to View More IPC IPC(8): G01F1/42G01F15/10
CPCG01F1/42G01F15/10
Inventor 唐陈一郎李文亮卢锋
Owner 银川融神威自动化仪表厂(有限公司)