Bidirectional permanent magnetic induction flowmeter
A magnetic induction, flowmeter technology, applied in the field of flowmeters, can solve the problems of large error, difficulty in bidirectional measurement, and increased system cost, and achieve the effects of fast response, improved anti-interference ability, and simple structure
Inactive Publication Date: 2010-07-14
NAVAL UNIV OF ENG PLA
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Problems solved by technology
[0002] As known to those skilled in the art, existing flowmeters mainly include turbine flowmeters and electromagnetic flowmeters. Turbine flowmeters measure flow according to the proportional relationship between the rotational angular velocity of the impeller and the fluid flow velocity. It has simple structure, high precision, It has the advantages of strong flow capacity, etc., but the existence of pressure loss makes two-way measurement difficult, and the error is large in the process of small flow measurement; electromagnetic flowmeter has a wide measurement range, small pressure loss, fast response speed and good sensitivity to the measured fluid. The temperature, pressure and flow state require small advantages, but the electromagnetic flowmeter can only measure the flow of the conductor fluid, and the problem of electromagnetic excitation interference has always been a major defect of the electromagnetic flowmeter
In order to solve the shortcomings of the above-mentioned electromagnetic flowmeter, many scholars have studied AC excitation, DC excitation, square wave excitation, etc., but the system cost is greatly increased.
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[0016] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
[0017] like figure 1 A two-way permanent magnetic induction flowmeter is shown, which includes a measuring tube 1, a central shaft 3 coaxial with the measuring tube 1, a guide vane 2 and a detection device 8, wherein the middle section of the central shaft 3 An annular track 6 is arranged between the middle section of the measuring tube 1, and a magnetically permeable ball 5 that can move around it is arranged inside the annular track 6, and the detection device 8 is arranged at a position corresponding to the outer ring of the measuring tube 1 and the annular track 6 , the annular track 6 can limit the lateral movement of the magnetically conductive ball 5 and allow the fluid in the measuring tube 1 to flow through, and the guide vanes 2 are arranged on both sides of the annular track 6 in the measuring tube 1. Between the track 6 and the guide vane 2,...
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The invention discloses a bidirectional permanent magnetic induction flowmeter, which comprises a measuring tube, a middle axle coaxial with the measuring tube, flow guide wings and a detection device. An annular track is arranged between the middle section of the middle axle and the middle section of the measuring tube; a small magnetism-conducting ball capable of moving around the annular track is arranged in the annular track; the detection device is arranged at a position on the outer circle of the measuring tube corresponding to the annular track; the annular track can limit the small magnetism-conducting ball to transversely move leftwards and rightwards and makes fluid in the measuring tube pass through; the flow guide wings are arranged on two sides of the annular track in the measuring tube; and eddying flow generating wings capable of making the fluid rotate after passing through are arranged between the annular track and the flow guide wings. The bidirectional permanent magnetic induction flowmeter has the advantages of capability of measuring flow rate of various non magnetism-conducting low-viscosity acidic and alkali fluids, along with simple structure, high antijamming capability, low loss of pressure head, high corrosion resistance and high reaction speed.
Description
technical field [0001] The invention relates to the technical field of flowmeters, in particular to a bidirectional permanent magnet magnetic induction flowmeter. technical background [0002] As known to those skilled in the art, existing flowmeters mainly include turbine flowmeters and electromagnetic flowmeters. Turbine flowmeters measure flow according to the proportional relationship between the rotational angular velocity of the impeller and the fluid flow velocity. It has simple structure, high precision, It has the advantages of strong flow capacity, etc., but the existence of pressure loss makes two-way measurement difficult, and the error is large in the process of small flow measurement; electromagnetic flowmeter has a wide measurement range, small pressure loss, fast response speed and good sensitivity to the measured fluid. The temperature, pressure and flow state require small advantages, but the electromagnetic flowmeter can only measure the flow of the conduc...
Claims
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Inventor梁前超李华志张顺
OwnerNAVAL UNIV OF ENG PLA