CN210180489U

CN210180489U - Grounding structure of electromagnetic flowmeter sensor

Info

Publication number: CN210180489U
Application number: CN201920876202.0U
Authority: CN
Inventors: Yangcheng Tang; 唐杨成
Original assignee: SHANGHAI GUANGHUA INSTRUMENT CO Ltd
Current assignee: SHANGHAI GUANGHUA INSTRUMENT CO Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-03-24
Anticipated expiration: 2029-06-12

Abstract

The utility model provides a grounding structure of electromagnetic flowmeter sensor, including the pipe, be equipped with the electrode in the pipe, and locate the shell on the pipe, be equipped with excitation coil in the shell, still include a pair of curb plates that connect respectively on the shell both ends, the curb plate cover is located on the pipe, and overlap a pair of flanges that locate on the pipe both ends respectively; a measuring electrode is connected to the position of the conduit between the pair of side plates; a grounding electrode is connected to the position of the guide pipe between the side plate and the flange on the same side; and the outer side surfaces of the pair of flanges are connected with liners. The utility model discloses to connect the liquid electrode to install outside magnetic field region, thoroughly avoided electromagnetic flowmeter to connect the electromagnetic interference that the liquid electrode brought.

Description

Grounding structure of electromagnetic flowmeter sensor

Technical Field

The utility model relates to an electromagnetic flow meter sensor, more specifically say, relate to an electromagnetic flow meter sensor's ground structure.

Background

The electromagnetic flowmeter is a speed type instrument which is based on Faraday's law of electromagnetic induction, compares the electromotive force generated by cutting magnetic lines by conductive fluid with the reference potential of the measured liquid, and finally converts the induced potential signal into flow speed and finally into volume flow.

The working principle of the electromagnetic flowmeter determines that the electromagnetic flowmeter has to work with a reference potential of a measured liquid as a reference. Therefore, in addition to the measuring electrode, the electromagnetic flowmeter must have a grounding ring or grounding electrode in contact with the measured liquid to obtain a reference potential signal.

As shown in fig. 1, the electromagnetic flowmeter is usually contacted with the measured liquid by means of a liquid grounding ring 1 to meet the grounding requirement. However, in many cases, the liquid measured by the electromagnetic flowmeter has very serious corrosivity, and a noble metal liquid (such as tantalum, titanium, platinum and the like) is required to meet the corrosivity requirement. Due to the large area of the liquid grounding ring 1, if the liquid grounding ring 1 is used for grounding, the cost is very high.

As shown in fig. 2 and 3, in order to solve this problem, liquid contact is generally performed by using a liquid contact electrode. The liquid-contacting electrode 2 is usually arranged on the same circumference as the measuring electrode 3, perpendicular to the position of the measuring electrode 3. The liquid receiving method has the disadvantages that the liquid receiving electrode 2 is required to be arranged in the magnetic field 4 and receives electromagnetic induction signals synchronously with the measuring electrode 3, so that interference is brought to the measuring signals, and the measuring signals are easy to fluctuate.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned defect that exists among the prior art, the utility model aims at providing an electromagnetic flowmeter sensor's ground structure will connect the liquid electrode to install outside the magnetic field region, has thoroughly avoided electromagnetic flowmeter to connect the electromagnetic interference that the liquid electrode brought.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the grounding structure of the electromagnetic flowmeter sensor comprises a guide pipe, a shell, a pair of side plates, a pair of flanges and a pair of connecting plates, wherein electrodes are arranged in the guide pipe, the shell is arranged on the guide pipe, a magnet exciting coil is arranged in the shell, the pair of side plates are respectively connected to two ends of the shell, the side plates are sleeved on the guide pipe, and the pair of flanges are respectively sleeved on two ends of the guide pipe;

a measuring electrode is connected to the position of the conduit between the pair of side plates;

a grounding electrode is connected to the position of the guide pipe between the side plate and the flange on the same side;

the inner side of the conduit and the outer side of the pair of flanges are both connected with liners.

The pair of flanges and the guide pipe are connected in a welding mode.

The pair of side plates and the guide pipe are connected in a welding mode.

The lining is a soft insulating sealing material, preferably rubber or fluoroplastic.

The measuring electrodes are provided with a pair and are symmetrically arranged along the horizontal axis of the catheter.

The grounding electrode is provided with one grounding electrode, is arranged on the position of the guide pipe between the side plate and the flange on any side and is symmetrically arranged along the vertical axis of the guide pipe.

The grounding electrode is sealed through a threaded pressurizing spring.

In the technical scheme, the utility model provides a pair of electromagnetic flowmeter sensor's ground structure not only effectively solves the electromagnetic flowmeter ground connection problem of strong corrosive medium, and the electromagnetic interference problem that the electromagnetic flowmeter that has still thoroughly avoided connecing the liquid electrode to bring is simple in structural improvement, low cost, and the effect is obvious.

Drawings

FIG. 1 is a schematic diagram of a prior art electromagnetic flow meter;

FIG. 2 is a schematic view of an installation of a conventional liquid-receiving electrode;

FIG. 3 is a schematic view in the direction A-A of FIG. 2;

fig. 4 is a schematic diagram of the grounding structure of the present invention;

FIG. 5 is a schematic view in the direction B-B in FIG. 4;

fig. 6 is a sectional view of the ground structure of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

Please refer to fig. 4 to 6, the grounding structure of an electromagnetic flowmeter sensor provided by the present invention includes a conduit 5, an electrode 6 installed in the conduit 5, and a housing 7 sleeved on the conduit 5, and an excitation coil 8 installed in the housing 7, which are not described again for the prior art. Different from the prior art, the magnetic field.

Preferably, a measuring electrode 11 is connected to the position of the guide tube 5 between the pair of side plates 9, and a pair of measuring electrodes 11 is arranged and symmetrically arranged along the horizontal axis of the guide tube 5.

Preferably, the position of the guide pipe 5 between the side plate 9 and the flange 10 on the same side is connected with a grounding electrode 12, and the grounding electrode 12 is provided with one, is installed on the position of the guide pipe 5 between the side plate 9 and the flange 10 on any side, and is symmetrically arranged along the vertical axis of the guide pipe 5, so that the grounding electrode 12 is installed outside the range of the magnetic field area, and the electromagnetic interference problem caused by the liquid receiving electrode of the electromagnetic flowmeter is thoroughly avoided.

Preferably, the ground electrode 12 is also sealed by a threaded compression spring.

Preferably, a lining 13 is further attached to each of the inner side surface of the conduit 5 and the outer side surfaces of the pair of flanges 10, and the lining 13 is made of a soft insulating sealing material, preferably rubber or fluoroplastic.

To sum up, the utility model provides a pair of electromagnetic flowmeter sensor's ground structure not only effectively solves the electromagnetic flowmeter ground connection problem of strong corrosive medium, and the electromagnetic interference problem that the electromagnetic flowmeter that has still thoroughly avoided connecing the liquid electrode to bring is simple in construction improvement, low cost, and the effect is obvious.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. The utility model provides an electromagnetic flowmeter sensor's ground structure, includes the pipe, is equipped with the electrode in the pipe, and locates the shell on the pipe, is equipped with excitation coil, its characterized in that in the shell: the side plates are sleeved on the guide pipe and are respectively sleeved on a pair of flanges at two ends of the guide pipe;

a grounding electrode is connected to the position of the guide pipe between the side plate and the flange;

2. The grounding structure of an electromagnetic flow meter sensor of claim 1, wherein: the pair of flanges and the guide pipe are connected in a welding mode.

3. The grounding structure of an electromagnetic flow meter sensor of claim 1, wherein: the pair of side plates and the guide pipe are connected in a welding mode.

4. The grounding structure of an electromagnetic flow meter sensor of claim 1, wherein: the lining is a soft insulating sealing material, and the soft insulating sealing material is rubber or fluoroplastic.

5. The grounding structure of an electromagnetic flow meter sensor of claim 1, wherein: the measuring electrodes are provided with a pair and are symmetrically arranged along the horizontal axis of the catheter.

6. The grounding structure of an electromagnetic flow meter sensor of claim 1, wherein: the grounding electrode is provided with one grounding electrode, is arranged on the position of the guide pipe between the side plate and the flange on any side and is symmetrically arranged along the vertical axis of the guide pipe.

7. The grounding structure of an electromagnetic flow meter sensor of claim 6, wherein: the grounding electrode is sealed through a threaded pressurizing spring.