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Capacitive dry powder flow meter

A flowmeter and capacitive technology, applied in the field of flowmeters, can solve the problems of flowmeters not being able to withstand high pressure, accuracy, etc.

Inactive Publication Date: 2015-08-26
山东胜油固井工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these flowmeters have disadvantages such as not being able to withstand high pressure or having low accuracy.

Method used

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  • Capacitive dry powder flow meter
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  • Capacitive dry powder flow meter

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Embodiment Construction

[0018] The present invention will be further disclosed with specific embodiments below.

[0019] A capacitive dry powder flowmeter includes a capacitance detection unit and a signal processing unit. The capacitance detection unit includes a ceramic tube 6 as the inner liner of the measuring tube. The outer wall of the ceramic tube 6 is square and the inner cavity is a circular channel. The ceramic tube 6 The specification is 423mm*120mm*120mm (length*width*height). Ceramics have the characteristics of high insulation and compressive strength. Using ceramics as the inner tank can avoid the static electricity generated by friction during the transportation of powdery materials. Both ends of the ceramic tube 6 are respectively provided with a protective shell 1, and the outer periphery of the ceramic tube 6 is wrapped with a 10mm thick insulating plate 4 (insulating rubber) as the shell to isolate external interference. A total of eight groups of flat capacitors are arranged ...

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Abstract

A capacitive dry powder flow meter comprises a capacitive detection unit and a signal processing unit. The capacitive detection unit comprises a ceramic pipe serving as an inner container of a measuring pipe. The outer wall of the ceramic pipe is square, an inner cavity of the ceramic pipe is a circular duct, and a thick insulating plate wraps the periphery of the ceramic pipe. Eight plate capacitors are arranged between the ceramic pipe and the thick insulating plate. Two of the plate capacitors are attached to each face of the ceramic pipe, wherein one is located at the front end of the ceramic pipe, and the other is located at the rear end of the ceramic pipe. Each plate capacitor is composed of two parallel capacitor plates, and a copper foil outer circle is additionally arranged on the outer edge of each plate capacitor and is grounded through a wire. One end of each plate capacitor is connected with a signal processing unit through a signal wire, and the other end of each plate capacitor is grounded through a wire. Compared with the prior art, the capacitive dry powder flow meter has the advantages of being simple in structure, high in temperature stability, high in definition, good in dynamic response, and capable of working under severe conditions such as high temperature radiation and strong vibration.

Description

technical field [0001] The invention relates to the field of flowmeters, in particular to a flowmeter for measuring the flow and density of dry powder media. Background technique [0002] Dry powder flowmeters can be used to measure the flow and density of powdery materials, and are widely used in the pneumatic conveying industry of powdery materials. There are many kinds of flowmeters currently used to measure the flow and density of dry powder, such as baffle flowmeters, microwave flowmeters, Electrostatic flowmeter, etc.; for example, the measurement principle of microwave flowmeter is based on the physical principle of Doppler effect. The sensor generates a microwave field in the pipeline, and the microwave is reflected by the particles flowing in the pipeline. Calculating frequency and amplitude changes accurately measures solids flow, non-flowing particles such as dust deposits are not accounted for. However, these flowmeters have disadvantages such as not being able ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/56G01N9/00
Inventor 王崇德胡潍郭浩淼王思家孙健孙兆纯孙月燕李延伟刘庆
Owner 山东胜油固井工程技术有限公司
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