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Internal-bevel and venturi assembled flowmeter with variable area

A Venturi tube and variable area technology, which is applied in the direction of volume/mass flow generated by mechanical effects, fluid flow detection by measuring pressure difference, etc., can solve the problem of low measurement accuracy of throttling flowmeters, high requirements for on-site installation conditions, and flow problems. Large resistance and other problems, to achieve the effect of small flow resistance, high signal-to-noise ratio, and short straight pipe sections before and after

Inactive Publication Date: 2006-03-15
CHINA JILIANG UNIV
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Problems solved by technology

[0006] In order to solve the problems of low measurement accuracy of throttling flowmeters, high requirements for on-site installation conditions, narrow range, and large flow resistance, the purpose of the present invention is to provide an internal flowmeter capable of measuring the flow of air and steam with a large flow range in the pipe. Cone-Venturi combined variable area flowmeter

Method used

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  • Internal-bevel and venturi assembled flowmeter with variable area

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with drawings and embodiments.

[0012] As shown in the accompanying drawings, the present invention includes a nozzle-type Venturi tube 2 with a high-pressure pressure-taking port 1 on the flange and a low-pressure pressure-taking port 3 in the expansion section. The nozzle-type Venturi tube 2 is equipped with a cone core 4 , the large end of the cone core 4 faces the large port of the nozzle-type Venturi tube 2, the large end of the nozzle-type Venturi tube 2 is connected to the outer tube 5, the large end of the cone core 4 is fixedly connected with a slide rod 6, and the two ends of the slide rod 6 It is sealed with a dust-proof sealing washer and a nut 9. A balance spring 7 is set on the slide bar 6 and installed in the dust cover 12 of the outer tube 5. The dust cover 12 is supported in the middle of the outer tube 5 by a support 8, and the slide bar 6 can move axially, and adjusting nut 11 is ho...

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Abstract

An internal taper ¿C Venturi tube integrated flow meter of variable area is prepared as setting taper core in expanding section of Venturi tube down stream to let the two form a circular channel, making circular channel flowing area generate variation by moving taper core backward and forward according to different flow rate, setting high pressure sample connection at up stream of Venturi tube and low pressure sample connection on tube wall of section in Venturi tube, converting obtained differential pressure signal to be electric signal through pressure transmitter for obtaining flow rate data .

Description

technical field [0001] The invention relates to a flow measuring device, in particular to an inner cone-venturi combined variable area flowmeter. Background technique [0002] Differential pressure flowmeters represented by orifice plates, nozzles and venturi tubes have a long history of application, complete standards and specifications, rich and mature practical experience, complete varieties and specifications, low cost, and reliable operation. They have always occupied an important position in flow measurement. In the middle and late 1990s, all kinds of differential pressure flowmeters were widely used in the world, and the market of differential pressure flowmeters in my country was also very broad. However, it also has many shortcomings: such as low measurement accuracy, high requirements for on-site installation conditions, narrow range, non-linear output, and large flow resistance. With the development of society and economy, people put forward higher requirements f...

Claims

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Application Information

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IPC IPC(8): G01F1/34G01F1/44
Inventor 张洪军苏中地史晓妍
Owner CHINA JILIANG UNIV
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