Wide-range double-vortex flowmeter
A technology of vortex street flow and flowmeter, which is applied in the electronic field, can solve the problems of narrow detection range of gas flowmeter, and achieve the effect of rich data, good flow velocity characteristics and improved detection accuracy
Active Publication Date: 2012-05-23
CHONGQING MAS SCI & TECH CO LTD
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Problems solved by technology
[0004] In view of the above-mentioned deficiencies in the prior art, the main purpose of the present invention is to solve the problem of the narrow detection range of the current gas flowmeter, and provide a double vortex flowmeter with a wide detection range
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] like figure 1 , figure 2 and image 3 As shown, the wide-range double vortex flowmeter of the present invention includes a measuring tube 1, flanges 7 are respectively arranged at both ends of the measuring tube 1, and a flange 7 is arranged on the inner wall of the measuring tube 1 upstream for detecting low-velocity gas signals. An ultrasonic vortex flow sensor 2 and a stress vortex flow sensor 3 arranged downstream of the inner wall of the measuring tube 1 for detecting high-velocity gas signals. The ultrasonic vortex flow sensor 2 is composed of a first vortex generating body 21, an ultrasonic transmitting transducer 22 and an ultrasonic receiving transducer 23, and the first vortex generating body 21, the ultrasonic transmitting transducer 22 and the ultrasonic receiving transducer 23 are existing equipment, the role of the firs...
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The invention provides a wide-range double-vortex flowmeter, which comprises an ultrasonic vortex flow sensor arranged in the upstream of a measuring pipe and a stress vortex flow sensor arranged in the downstream of the measuring pipe. The ultrasonic vortex flow sensor and the stress vortex flow sensor are connected to a flow converter; the flow converter consists of a switching unit and a measurement and control calculating unit; outputs of the ultrasonic vortex flow sensor and the stress vortex flow sensor are connected with the input of the switching unit respectively; a gas flow signal detected by the ultrasonic vortex flow sensor and the stress vortex flow sensor is switched and controlled by the switching unit, and is then input to the measurement and control calculating unit; the measurement and control calculating unit processes the received gas flow signal and then outputs and displays the signal; and the output of the measurement and control calculating unit is also connected with a control end of the switching unit to form a closed-loop circuit. Two different vortex flow sensors are used by the invention, and the switching control is performed through the flow converter, so wide-range gas flow detection is realized.
Description
technical field [0001] The invention relates to a wide-range flowmeter for measuring gas flow in coal mines, which belongs to the field of electronic technology. Background technique [0002] Gas is the main hazard factor for underground coal mine workers. It has the characteristics of high humidity, dust, corrosiveness, low air pressure, unbalanced gas flow, and a particularly large flow range. The current treatment method for gas is to pump it out. It is transported to natural gas companies through pipelines as raw materials for civil natural gas. However, due to the large difference in the flow rate of gas between the peak period and the trough period of gas consumption, which can reach tens or even hundreds of times, the gas flowmeter must have a wide measurement range, high sensitivity and small pressure loss. [0003] Most of the existing gas flowmeters use vortex flowmeters, but the current vortex flowmeters have the problem of narrow detection range, such as tail co...
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IPC IPC(8): G01F1/32G01F1/66
Inventor 叶立胜全太锋孙申厚刘建华杨志勇
Owner CHONGQING MAS SCI & TECH CO LTD