CN205426251U - Multistage rectification type electromagnetic flow transducer - Google Patents
Multistage rectification type electromagnetic flow transducer Download PDFInfo
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- CN205426251U CN205426251U CN201620174810.3U CN201620174810U CN205426251U CN 205426251 U CN205426251 U CN 205426251U CN 201620174810 U CN201620174810 U CN 201620174810U CN 205426251 U CN205426251 U CN 205426251U
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Abstract
The utility model discloses a multistage rectification type electromagnetic flow transducer, including tubing assembly, electrode subassembly, coil pack, magnetic core and yoke, tubing assembly is including the one -level rectification section, second grade rectification section and the tertiary rectification section that connect gradually, and tertiary rectification section is rounded rectangle's a straight tube for the cross -section, and the electrode subassembly laminating is installed in the outside both sides of tertiary rectification section, and the magnetic core laminating is installed at the outside both sides of tertiary rectification section and perpendicular with electrode subassembly, coil pack and magnetic core laminating. During fluid process electromagnetic sensor, at first by one -level rectification section ( venturi nozzle ) rectification, then by second grade rectification section (open channel rectangle) rectification to improve circulation electromagnetic sensor's the medium velocity of flow. Response medium between the electrode is in mutually unidimensionally with the magnetic core distance to ensure induced magnetic field's uniformity. This scheme is applicable to most flow measurement occasion, especially is fit for detecting the lower object of the velocity of flow.
Description
Technical field
This utility model relates to measuring equipment, especially relates to a kind of multi-stage rectifying type electromagnetic flow transducer.
Background technology
Electromagnetic flowmeter is based on Faraday law of electromagnetic induction principle design, the measurement pipe of effusion meter is the non-magnetic alloy conduit of insulation liner material, two electrodes are fixed on measurement pipe along caliber direction break-through tube wall, when magnet exciting coil is by pulsed field magnetization, operating fields will be produced on the direction vertical with measuring pipeline.Measuring principle based on electromagnetic flowmeter and the development of technology, electromagnetic flowmeter survey precision is high, be widely used in metering and the control field of conductive liquid without technical characterstics such as crushings.
Existing effusion meter has the disadvantage in that in lower limit fields of measurement
1, magnet exciting coil is distributed in the magnetic field of two symmetry electrode diameters is decentralized model, and magnetic field, the center of circle is the strongest, and the most weak near electrode position magnetic field, in causing whole measurement range ability, the instrument linearity is undesirable；
2, when low flow velocity is measured, designing for latus rectum type sensor construction, minimum near tube wall flow velocity, pipeline center's flow velocity is the highest, and rate-of flow is the least, and its difference is the biggest, directly results in lower limit accuracy rating mostly from more than 0.4m/s guarantee measure of precision.
State Intellectual Property Office of the People's Republic of China disclosed the patent documentation (publication number: CN103017841A) of entitled " measuring the electromagnetic flow transducer of pipe all insulation integration " on 04 03rd, 2013, it measures the structure of effective all insulation integration, measuring electrode, ground electrode and described measurement tube wall and be directly embedded into formula fixed seal connection, before and after sensor housing, aluminium alloy side plate in both sides is connected with the rustless steel external catheter embedding die casting being placed in described measurement pipe two ends.This scheme yet suffers from that the instrument linearity is undesirable, low speed measures inaccurate defect.
Summary of the invention
This utility model mainly solves that the instrument linearity existing for prior art is undesirable, low speed measures inaccurate etc. technical problem, it is provided that a kind of has the preferable linearity, still can obtain the multi-stage rectifying type electromagnetic flow transducer of measurement result accurately in the case of flow velocity is relatively low.
nullThis utility model is mainly addressed by following technical proposals for above-mentioned technical problem: a kind of multi-stage rectifying type electromagnetic flow transducer，Including conduit tube component、Electrode assemblie、Coil block、Magnetic core and yoke，Described conduit tube component includes the one-level rectification section being sequentially connected with、Two grades of rectification sections and three grades of rectification sections，Described one-level rectification section is circular arc Venturi rectifying pipe，Three grades of rectification sections be cross section be the straight tube of round rectangle，Two grades of rectification sections are contraction-like，The entrance of two grades of rectification sections is circular，The outlet of two grades of rectification sections is round rectangle，Electrode assemblie is jointly mounted to the both sides outside three grades of rectification sections，Magnetic core is jointly mounted to both sides outside three grades of rectification sections vertical with electrode assemblie，Coil block is fitted with magnetic core，Yoke is by coil block、Magnetic core、Electrode assemblie and three grades of rectification sections are wrapped in interior and are connected with coil block.
Conduit tube component is non-magnetic medium.Electrode assemblie is used for measuring output magnetic induction signal.In this programme, conduit tube component uses multi-stage rectifying design, fluid is through electromagnetic transducer, first by one-level rectification section (Venturi nozzle) rectification, then by two grades of rectification sections (open channel rectangle) rectification, thus on the premise of not upsetting fluid, the state of convection cell carries out rectification, improves the velocity of medium of flow-thru electrode Magnetic Sensor.
In this programme, the cross-sectional area of electrode measurement flow is in similar rectangular design so that the induction medium between electrode and magnetic core distance are in same size design, so that it is guaranteed that the concordance of induced field.
As preferably, described conduit tube component inner surface is coated with nylon molding powder.
Nylon molding powder is used for insulating, if measured for anti-corrosive properties, then liner first carries out PFA liner, then three grades of rectification sizes of processing.
As preferably, multi-stage rectifying type electromagnetic flow transducer also includes the wrapper sheet assembly of cylindrical shape, in the two ends of described wrapper sheet assembly are connected with the outer side seal of one-level rectification section or two grades of rectification sections and yoke are wrapped in.
Wrapper sheet assembly primarily serves buffer action, is welded on conduit, shields external magnetic field.
As preferably, described coil block includes two coils and two iron cores, and magnetic core has two, and coil is full of in the periphery of each iron core, and the first end of each iron core connects a magnetic core, and the second end connects yoke.
Iron core acts primarily as and adds strong magnetic field action, thus reduces coil cost.
As preferably, described electrode assemblie includes two electrodes, two electrodes are arranged on the left and right sides outside three grades of rectification sections and are wired to outside, two magnetic cores are arranged on the both sides up and down outside three grades of rectification sections, magnetic core laterally covers the air line distance between two electrodes, longitudinally covered whole three grades of rectification sections.
Magnetic core is uniformly distributed for magnetic field.For further ensuring that between two electrodes that the induced field between straight line keeps relatively, this programme have employed the Magnetic Core Design of Parallel Symmetric distribution, the upper and lower of the symmetrical design of two magnetic cores and conduit so that form unidirectional magnetic conduction.Two electrodes, two coils have two lead-in wires to draw respectively, and electrode wires is for the measurement of induction electromotive force, and coil magnetization line is for the introducing in magnetic field.
This utility model brings and provides the benefit that, by using the runner of the electromagnetic transducer of multi-stage rectifying type to be distributed so that fluid more tends towards stability, and improves lower limit measurement flow rate, it is ensured that the precision of lower limit flow；By using many kinds of measures to improve the induced field uniformity between electrode straight line, the range linearity of complete machine can be improved further；Conduit liner uses resistant to elevated temperatures PFA material design or the spraying of nylon molding powder, and the former can be widely applied to industrial pipeline and measures Korrosionsmedium, and the latter may be used for Drinking Water Industry.
Accompanying drawing explanation
Fig. 1 is of the present utility model a kind of main regarding sectional view；
Fig. 2 is a kind of left view sectional view of the present utility model；
In figure: 1, conduit tube component, 2, electrode, 3, coil, 4, iron core, 5, magnetic core, 6, yoke, 7, wrapper sheet assembly, 11, one-level rectification section, 12, two grades of rectification sections, 13, three grades of rectification sections.
Detailed description of the invention
Below by embodiment, and combine accompanying drawing, the technical solution of the utility model is described in further detail.
nullEmbodiment: a kind of multi-stage rectifying type electromagnetic flow transducer of the present embodiment，As depicted in figs. 1 and 2，Including conduit tube component 1、Electrode assemblie、Coil block、Magnetic core 5、Yoke 6 and wrapper sheet assembly 7，Conduit tube component includes the one-level rectification section 11 being sequentially connected with、Two grades of rectification sections 12 and three grades of rectification sections 13，One-level rectification section is circular arc Venturi rectifying pipe，Three grades of rectification sections be cross section be the straight tube of round rectangle，Two grades of rectification sections are contraction-like，The entrance of two grades of rectification sections is circular，The outlet of two grades of rectification sections is round rectangle，Electrode assemblie is jointly mounted to the both sides outside three grades of rectification sections，Magnetic core is jointly mounted to both sides outside three grades of rectification sections vertical with electrode assemblie，Coil block is fitted with magnetic core，Yoke is by coil block、Magnetic core、Electrode assemblie and three grades of rectification sections are wrapped in interior and are connected with coil block.
In the two ends of wrapper sheet assembly are connected with the outer side seal of one-level rectification section or two grades of rectification sections and yoke are wrapped in.
Coil block includes two coils 3 and two iron cores 4, and magnetic core has two, and coil is full of in the periphery of each iron core, and the first end of each iron core connects a magnetic core, and the second end connects yoke.
Electrode assemblie includes two electrodes 2, two electrodes are arranged on the left and right sides outside three grades of rectification sections and are wired to outside, two magnetic cores are arranged on the both sides up and down outside three grades of rectification sections, and magnetic core laterally covers the air line distance between two electrodes, longitudinally covered whole three grades of rectification sections.
Three grades of rectification designs are included inside conduit tube component, it is respectively one-level rectification (circular arc Venturi rectifying), two grades of rectifications (circular to rectangle contraction rectification), three grades of rectifications (rectangular pipeline section rectification), conduit tube component is non-magnetic medium, and its inner surface one layer of nonmetallic nylon molding powder of coating is used for insulating, if measured for anti-corrosive properties, sidelining first carries out PFA liner, then three grades of rectification sizes of processing.
Electrode assemblie is installed on the left and right sides, carries out sealing by O etc. and installs, and is used for measuring output magnetic induction signal.
Magnetic core is installed on conduit position symmetrical above and below, and the size of its magnetic core laterally covers the air line distance between whole electrode, many to covering three grades of rectification straight lengths.Being uniformly distributed for magnetic field；
Coil and core assembly are mainly used in the introducing in magnetic field, and iron core acts primarily as and adds strong magnetic field action, thus reduces coil cost, are installed on the top of magnetic core, and contact forms one；
Yoke is wrapped in periphery, connects two coils, iron core, magnetic core so that magnetic field is circulated, and adds the intensity of high-intensity magnetic field, is additionally useful for extraneous shielding；
Wrapper sheet assembly primarily serves buffer action, is welded on conduit, shields external magnetic field.
Other two electrode assemblies, two coil blocks have two lead-in wires to draw respectively, and electrode wires is for the measurement of induction electromotive force, and coil magnetization line is for the introducing in magnetic field.
This programme is by improving the runner design of electromagnetic transducer conduit, it is achieved on the premise of flow field is stable, reduces its circulation area, improves the rate of flow of fluid by electromagnetic transducer, thus improves the lower limit accuracy rating of rate-of flow；Still further aspect improves its Distribution of Magnetic Field layout so that the magnetic field between two electrodes is in uniform state, improves the linearity in the range of overall range.
Specific embodiment described herein is only to this utility model spirit explanation for example.Described specific embodiment can be made various amendment or supplements or use similar mode to substitute by this utility model person of ordinary skill in the field, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Although the most more employing the terms such as conduit tube component, coil, magnetic core, but it is not precluded from using the probability of other term.Use these terms to be only used to more easily and describe and explain essence of the present utility model；It is all contrary with this utility model spirit for being construed as any additional restriction.
Claims (5)
1. a multi-stage rectifying type electromagnetic flow transducer, it is characterized in that, including conduit tube component, electrode assemblie, coil block, magnetic core and yoke, described conduit tube component includes the one-level rectification section being sequentially connected with, two grades of rectification sections and three grades of rectification sections, described one-level rectification section is circular arc Venturi rectifying pipe, three grades of rectification sections be cross section be the straight tube of round rectangle, two grades of rectification sections are contraction-like, the entrance of two grades of rectification sections is circular, the outlet of two grades of rectification sections is round rectangle, electrode assemblie is jointly mounted to the both sides outside three grades of rectification sections, magnetic core is jointly mounted to both sides outside three grades of rectification sections vertical with electrode assemblie, coil block is fitted with magnetic core, yoke is by coil block, magnetic core, electrode assemblie and three grades of rectification sections are wrapped in interior and are connected with coil block.
A kind of multi-stage rectifying type electromagnetic flow transducer the most according to claim 1, it is characterised in that described conduit tube component inner surface is coated with nylon molding powder.
A kind of multi-stage rectifying type electromagnetic flow transducer the most according to claim 1 and 2, it is characterised in that also include the wrapper sheet assembly of cylindrical shape, in the two ends of described wrapper sheet assembly are connected with the outer side seal of one-level rectification section or two grades of rectification sections and yoke are wrapped in.
A kind of multi-stage rectifying type electromagnetic flow transducer the most according to claim 1 and 2, it is characterised in that described coil block includes two coils and two iron cores, magnetic core has two, coil is full of in the periphery of each iron core, and the first end of each iron core connects a magnetic core, and the second end connects yoke.
A kind of multi-stage rectifying type electromagnetic flow transducer the most according to claim 4, it is characterized in that, described electrode assemblie includes two electrodes, two electrodes are arranged on the left and right sides outside three grades of rectification sections and are wired to outside, two magnetic cores are arranged on the both sides up and down outside three grades of rectification sections, magnetic core laterally covers the air line distance between two electrodes, longitudinally covered whole three grades of rectification sections.
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| CN201620174810.3U CN205426251U (en) | 2016-03-08 | 2016-03-08 | Multistage rectification type electromagnetic flow transducer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255493A (en) * | 2017-07-06 | 2017-10-17 | 郑州联慧双创知识产权代理有限公司 | A kind of novel electron flow apparatus |
| CN108801374A (en) * | 2018-06-01 | 2018-11-13 | 重庆川仪自动化股份有限公司 | A kind of flow passage structure improving Electromagnetic Flow performance |
| CN108871472A (en) * | 2018-06-01 | 2018-11-23 | 重庆川仪自动化股份有限公司 | A kind of magnetic circuit device enhancing Electromagnetic Flow signal |
| CN114577282A (en) * | 2022-03-21 | 2022-06-03 | 浙江迪元仪表有限公司 | Self-rectifying low-power-consumption electromagnetic water meter sensor |
| CN116734934A (en) * | 2023-08-11 | 2023-09-12 | 德阳市新泰自动化仪表有限公司 | Compact electromagnetic flowmeter, installation method and flow measuring method |
-
2016
- 2016-03-08 CN CN201620174810.3U patent/CN205426251U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255493A (en) * | 2017-07-06 | 2017-10-17 | 郑州联慧双创知识产权代理有限公司 | A kind of novel electron flow apparatus |
| CN108801374A (en) * | 2018-06-01 | 2018-11-13 | 重庆川仪自动化股份有限公司 | A kind of flow passage structure improving Electromagnetic Flow performance |
| CN108871472A (en) * | 2018-06-01 | 2018-11-23 | 重庆川仪自动化股份有限公司 | A kind of magnetic circuit device enhancing Electromagnetic Flow signal |
| CN114577282A (en) * | 2022-03-21 | 2022-06-03 | 浙江迪元仪表有限公司 | Self-rectifying low-power-consumption electromagnetic water meter sensor |
| CN116734934A (en) * | 2023-08-11 | 2023-09-12 | 德阳市新泰自动化仪表有限公司 | Compact electromagnetic flowmeter, installation method and flow measuring method |
| CN116734934B (en) * | 2023-08-11 | 2023-11-14 | 德阳市新泰自动化仪表有限公司 | Compact electromagnetic flowmeter, installation method and flow measuring method |
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