CN205879265U - Electromagnetic flowmeter - Google Patents

Electromagnetic flowmeter Download PDF

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Publication number
CN205879265U
CN205879265U CN201620795290.8U CN201620795290U CN205879265U CN 205879265 U CN205879265 U CN 205879265U CN 201620795290 U CN201620795290 U CN 201620795290U CN 205879265 U CN205879265 U CN 205879265U
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CN
China
Prior art keywords
ground loop
electromagnetic flowmeter
ground
liquid electrode
medium
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Active
Application number
CN201620795290.8U
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Chinese (zh)
Inventor
唐杨成
陈佳
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SHANGHAI GUANGHUA INSTRUMENT CO Ltd
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SHANGHAI GUANGHUA INSTRUMENT CO Ltd
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Priority to CN201620795290.8U priority Critical patent/CN205879265U/en
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Abstract

The utility model discloses an electromagnetic flowmeter, including the sensor and rather than the converter that links to each other, the both sides limit of converter still links respectively has the medium pipeline, and the medium pipeline is equipped with on all and connects the liquid electrode, even have the ground loop on connecing the liquid electrode, the ground loop is corrosion -resistant material, still links the earth conductor who has for ground loop ground connection on the side of ground loop. The utility model discloses can solve the ground connection problem of electromagnetic flowmeter in strong corrosive medium occasion effectively.

Description

A kind of electromagnetic flowmeter
Technical field
This utility model relates to Ferraris instrument, more particularly, it relates to a kind of electromagnetic flowmeter.
Background technology
Electromagnetic flowmeter is a kind of based on Faraday law of electromagnetic induction, the sense produced by conductor fluid cutting magnetic line Answer electromotive force to measure the average speed in cross section, then according to bore (fixed value) and flow velocity, be converted into the sensing of volume flow Formula instrument.
Conventional electromagnetic flowmeter is typically all made up of sensor and the big parts of transducer two, and during measurement, transducer is responsible for Thering is provided the exciting current needed to sensor, after sensor excitation coil energising, produce magnetic field, conducting medium is at sensor tube In when flow through, do the motion of cutting magnetic line and output induction electromotive force, the induction electromotive force of generation is by sensor Two electrode detection out, feed back to transducer.
The transducer of electromagnetic flowmeter needs have the strongest anti-common mode disturbances ability, and the electrode detection on transducer is out Induction electromotive force, the amplifier being input to transducer is differential In-put design, then one of them public reference ground is must Need, this " " must be connected with the ground of signal source.For electromagnetic flowmeter, it is simply that touch medium, fill suitably Liquid-contacting part just can be reliably, stably using the signal of the conducting liquid datum mark as differential flow signal with transducer Couple together, keep measuring basis and the same current potential of measured medium.Thus ensure the normal work of instrument.
Medium is in pipeline, if process pipe is to be made from a material that be electrically non-conductive, or metallic conduit but there is insulation inside Lining, it is exactly required for now stretching into the ground loop that pipe interior contacts with medium, as it is shown in figure 1, traditional ground loop is whole Body material carries out connecing liquid and forming stable datum mark.
But the medium of measuring of the most this occasion has the strongest corrosivity, connect liquid material must be Hastelloy, tantalum, The precious metals such as platinum/iridium alloy, use traditional ground loop to be usually associated with high cost.
Utility model content
For drawbacks described above present in prior art, the purpose of this utility model is to provide a kind of electromagnetic flowmeter, energy Enough efficiently solve the electromagnetic flowmeter problem with grounding in strong corrosive medium occasion.
For achieving the above object, this utility model adopts the following technical scheme that
A kind of electromagnetic flowmeter, including sensor and coupled transducer, the dual-side of transducer connects the most respectively Having medium pipeline, medium pipeline is all provided with and connects liquid electrode, described in connect and on liquid electrode, be connected with ground loop, ground loop is corrosion-resistant material Material, the side of ground loop is also connected with the earth lead in order to ground loop ground connection.
Described resistant material is politef.
Described earth lead is connected on ground loop by securing member.
The described liquid electrode that connects is inserted in ground loop, and is connected with ground loop.
Described ground loop is located at one and is connect on liquid electrode.
Comprehensive above technical scheme, ground loop of the present utility model uses polytetrafluoroethylmaterial material to make, can be significantly Cost-effective, and by the way of earth lead is drawn, complete ground connection, form stable datum mark with this, it is possible to have Effect ground solves the electromagnetic flowmeter problem with grounding in strong corrosive medium occasion.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing ground loop;
Fig. 2 is the schematic diagram of this utility model structure;
Fig. 3 is the schematic diagram that this utility model is arranged on scene.
Detailed description of the invention
The technical solution of the utility model is further illustrated below in conjunction with the accompanying drawings with embodiment.
Incorporated by reference to shown in Fig. 2 to Fig. 3, a kind of electromagnetic flowmeter provided by the utility model, including sensor 1 and with Its transducer 2 being connected, the dual-side of transducer 2 is connected with medium pipeline 3 the most respectively, and medium pipeline 3 is all provided with and connects liquid electrode 4, above-mentioned part is prior art, just repeats no more at this.Unlike the prior art, connect described in be connected with on liquid electrode 4 and connect Ground ring 5, ground loop 5 is resistant material, so can be the most cost-effective, and solves electromagnetic flowmeter in deep-etching The problem with grounding of medium occasion.The earth lead 6 in order to ground loop 5 ground connection, earth lead 6 also it is connected with on the side of ground loop 5 It is connected on ground loop 5 by securing member 7, by the way of earth lead 6 is drawn, completes ground connection, form stable measurement with this Datum mark.
It is also preferred that the left described resistant material is politef, the corrosion-resistant specially good effect of politef almost can be resistance to The corrosion of all of conducting liquid, is therefore as preferably selecting.
It is also preferred that the left the described liquid electrode 4 that connects is inserted in ground loop 5, and it is connected with ground loop 5 so that connect liquid electrode 4 He An entirety is formed between ground loop 5.
Connect on liquid electrode 4 it is also preferred that the left described ground loop 5 is located at one, so make the medium of the dual-side of transducer 2 Pipeline 3 is respectively adopted two kinds of different structures (being while using traditional structure, another side uses this utility model), is all Ground loop 5 is contacted with liquid, can reliably, stably using conducting liquid as the datum mark of differential flow signals and conversion The signal of device couples together, and keeps measuring basis and the same current potential of measured medium, thus ensures the normal work of instrument.
Those of ordinary skill in the art is it should be appreciated that above embodiment is intended merely to illustrate that this practicality is new Type, and it is not used as to restriction of the present utility model, as long as in spirit of the present utility model, to the above The change of embodiment, modification all will fall in Claims scope of the present utility model.

Claims (5)

1. an electromagnetic flowmeter, including sensor and coupled transducer, the dual-side of transducer is connected with the most respectively Medium pipeline, medium pipeline is all provided with and connects liquid electrode, it is characterised in that connects described in: and is connected with ground loop, ground loop on liquid electrode For resistant material, the side of ground loop is also connected with the earth lead in order to ground loop ground connection.
2. a kind of electromagnetic flowmeter as claimed in claim 1, it is characterised in that described resistant material is polytetrafluoroethyl-ne Alkene.
3. a kind of electromagnetic flowmeter as claimed in claim 1, it is characterised in that described earth lead is connected in by securing member On ground loop.
4. a kind of electromagnetic flowmeter as claimed in claim 1, it is characterised in that the described liquid electrode that connects is inserted in ground loop In, and be connected with ground loop.
5. a kind of electromagnetic flowmeter as claimed in claim 1, it is characterised in that described ground loop is located at and is connect liquid electrode On.
CN201620795290.8U 2016-07-27 2016-07-27 Electromagnetic flowmeter Active CN205879265U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620795290.8U CN205879265U (en) 2016-07-27 2016-07-27 Electromagnetic flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620795290.8U CN205879265U (en) 2016-07-27 2016-07-27 Electromagnetic flowmeter

Publications (1)

Publication Number Publication Date
CN205879265U true CN205879265U (en) 2017-01-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620795290.8U Active CN205879265U (en) 2016-07-27 2016-07-27 Electromagnetic flowmeter

Country Status (1)

Country Link
CN (1) CN205879265U (en)

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