CN103649690B - Electromagnetic flowmeter and its earthing method - Google Patents
Electromagnetic flowmeter and its earthing method Download PDFInfo
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- CN103649690B CN103649690B CN201180072171.XA CN201180072171A CN103649690B CN 103649690 B CN103649690 B CN 103649690B CN 201180072171 A CN201180072171 A CN 201180072171A CN 103649690 B CN103649690 B CN 103649690B
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- flow meter
- meter body
- ground loop
- electromagnetic flowmeter
- fixation kit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
Abstract
The invention provides and a kind of there is the electromagnetic flowmeter of novel grounded layout and the earthing method for described electromagnetic flowmeter.Described electromagnetic flowmeter comprises: flow meter body, and described flow meter body within it circumference place has annular groove; Ground loop, described ground loop is incorporated in described groove, and be wherein in operation described ground loop and the conductive fluid electrical contact through described flow meter body; And at least one fixation kit, the described ground loop be incorporated in described groove is fixed on described flow meter body by described fixation kit, and is electrically connected on external ground point by described ground loop.This being different from is utilized to use ground-electrode or the novel grounded layout of ground loop of being fixed by flange and method, between described ground loop with corresponding fluid, establish larger contact area, and the accuracy of measurement of earthing effect and electromagnetic flowmeter is guaranteed and promotes.
Description
Technical field
The present invention relates generally to a kind of electromagnetic flowmeter and its earthing method, and or rather, relates to a kind of electromagnetic flowmeter being built-in with ground loop.
Background technology
Electromagnetic flowmeter is widely used for measuring the flow velocity of conductive fluid.Know at present, the ground connection of electromagnetic flowmeter is vital for the correct running of such flowmeter.For example, in order to obtain the accurate measurement of rate of flow of fluid, the ground connection of fluid is necessary, to guarantee that fluid and flowmeter transmitters are in zero potential equally.
The plastic body of flowmeter has embodied huge advantage in the various application connecting pipeline made of plastic equally.Such as, with regard to acquisition cost, such as purchase, installation and maintenance etc., stream of plastic gauge has a lot of advantages.For example, flowmeter can be soldered on various pipeline, therefore avoids any leakage, and provides cost savings owing to not needing flange.In addition, also ensure that the identical in quality of lining, this point is very important when use traffic measurement amount potable water.In addition, because stream of plastic gauge main body has better and more sane isolation for the induced voltage measured, the liner of standard electric magnetic flowmeter metal master can also therefore be saved.In much strict water supply and irrigation applications, stream of plastic gauge main body is best selection.
Be applicable to plastic lined piping, or with lining or the problem with grounding of electromagnetic flowmeter of metal pipe line being coated with non-conducting material, prior art uses following two kinds of methods.
One method uses ground-electrode, and conductive fluid is connected with flow meter body by ground-electrode, and flow meter body is made up of stainless steel or other metals.As shown in fig. 1, ground-electrode 20 is arranged in flow meter body, with conducting fluid contacts.In this arrangement, ground-electrode 20 is less with the contact area between conductive fluid, and the earthing effect therefore produced is poor.In addition, have easily impaired or be oxidized compared with the electrode of small area of contact with conductive fluid, thus earthing effect is worsened further.
Another kind method is between two pipelines, sandwich a ground loop.As shown in Figure 2, in this approach, ground loop is fixed by flange coupling.But the flow meter body be made up of plastic material is generally be welded on the two ends of each pipeline, instead of use flange coupling.That is, stream of plastic gauge main body does not generally need flange, and therefore, ground loop cannot be arranged on flow meter body via flange coupling.
Here need to provide a kind of and particularly have the earthing method of the electromagnetic flowmeter of stream of plastic gauge main body for electromagnetic flowmeter, this method can make the ground connection of flowmeter become more stable and reliable, and can save cost.
Summary of the invention
Therefore, the present invention, meanwhile can also the existing advantage of complete reservation existing techniques in realizing for solving the problems referred to above occurred in the prior art.
One object of the present invention, provides a kind of electromagnetic flowmeter, and the flow meter body of this electromagnetic flowmeter has a kind of ground connection layout of novelty, and this ground connection layout is different from the ground loop using ground-electrode or fixed by flange.In this is arranged, flow meter body does not need flange, and stream of plastic gauge main body can be welded on pipeline by user easily.
A further object of the present invention, provides a kind of electromagnetic flowmeter, and the flow meter body of this electromagnetic flowmeter has a kind of ground connection layout of novelty, and this ground connection layout can guarantee that the ground connection of electromagnetic flowmeter is more stable and reliable.In this is arranged, ground loop is annular, can guarantee like this to set up larger contact area with corresponding fluid.
Another object of the present invention, provides a kind of earthing method of electromagnetic flowmeter of novelty.Utilize this new method, do not need to configure flange, and meanwhile, the measurement accuracy of earthing effect and electromagnetic flowmeter is guaranteed and improves.
According to an aspect of the present invention, provide a kind of electromagnetic flowmeter, it comprises:
Flow meter body, described flow meter body within it circumference place has at least one annular groove;
At least one ground loop, described ground loop is incorporated at least one groove described, and wherein each ground loop is in operation and the conductive fluid electrical contact by described flow meter body; And
At least one fixation kit, described ground loop for the described ground loop be incorporated in described groove is fixed to described flow meter body, and is electrically connected on external ground point by described fixation kit.
Electromagnetic flowmeter according to an embodiment of the invention has novel ground connection layout, and this ground connection layout does not need to configure flange, meanwhile, can also guarantee the accuracy of measurement of earthing effect and electromagnetic flowmeter.
Described flow meter body can also comprise at least one hole, and described hole is radially across described flow meter body and extend to described groove.Each fixation kit can also comprise conducting bolt and nut, and described conducting bolt extends through the described hole of described flow meter body; Described nut is screwed onto on described bolt.In this way, ground loop can be fixedly secured to flow meter body groove on and ground connection securely.
Each ground loop all can also have at least one aperture, and at least one aperture described is aimed at at least one hole described of described flow meter body.The described conducting bolt of each fixation kit extends through the described hole of described flow meter body and the described aperture of described ground loop.
The described bolt of each fixation kit can also be soldered on described ground loop.
Described ground loop can be made up of the two halves of symmetry, every half has two inclined-planes at two ends place, and when half and second half fit together time, described two inclined-planes in described half complementally contact with described two inclined-planes on second half, thus make described two halves form continuous print ring.
Described ground loop can be single-piece part, and comprises the breaking part with two inclined-planes; And when described ground loop is incorporated in described groove, described two inclined-planes contact complimentary to one anotherly.
Preferably, described ground loop can be made up of the two halves of symmetry, every half has two recesses at two ends place, and when half and second half fit together time, described two recesses in described half and described described two sets of recesses on second half are fitted together to form two apertures.The ground loop of this structure is easy to manufacture, and meanwhile also contributes to the installation of this ground loop.
Preferably, fixation kit may further include the seal between bolts and nuts, thus the hole of sealing flow meter body.In this way, avoid fluid to leak from hole.
Preferably, the seal also comprises base, by the O shape ring be pressed between base and flow meter body.This is by further lift-off seal effect.
Preferably, the seal may further include filling bonding agent in the base.
Preferably, flow meter body may further include the recess on the excircle of flow meter body, and the position of described recess is corresponding with hole, and a part for seal is incorporated in this recess.Because the seal of a part is placed in the recess of surrounding hole, sealing effectiveness is promoted further.
Preferably, also comprise shell, surround flow meter body at this shell of position corresponding to groove.This shell can protect fixation kit, meanwhile promotes the intensity of flow meter body, even if flowmeter is provided with groove.
Preferably, the thickness of ground loop can correspond to the degree of depth of groove.In this way, ground loop can not in flow meter main body fluid by having an impact.
Preferably, the head of bolt can be made up of corrosion-resistant material.Other parts of bolt can be made up of more cheap material.Therefore manufacturing cost has been saved.
Preferably, shell can be communicated with the outer cover for covering cable, and this cable is for being electrically connected to external ground point by fixation kit.Therefore, can prevent from outside stube cable is exposed on, prevents from thus affecting outward appearance and preventing cable to be destroyed.
Preferably, fixation kit may further include solder packing ring, and this solder packing ring is for being connected to external ground point.Use this solder packing ring, contribute to grounding connection.
Preferably, flow meter body can be made up of plastic material.Therefore, even if this flow meter body is soldered on pipeline, still present significant advantage according to ground connection of the present invention layout.
According to another aspect of the present invention, provide a kind of earthing method for electromagnetic flowmeter, it comprises:
At the inner periphery place of the flow meter body of described electromagnetic flowmeter, at least one annular groove is set;
At least one ground loop is accommodated at least one groove described, with the conductive fluid electrical contact through described flow meter body;
By at least one fixation kit, each ground loop be accommodated in described groove is fixed on described flow meter body; And
By at least one fixation kit described, each ground loop is electrically connected on external ground point.
Preferably, at least one hole is formed in described flow meter body, and described hole is radially across described flow meter body and extend to described groove.The step of fixing described ground loop also comprises: make the conducting bolt of each fixation kit extend through the described hole of described flow meter body, and be screwed on described bolt by nut.
Preferably, at least one aperture is formed in described ground loop, and at least one aperture described is aimed at at least one hole described of described flow meter body.The step of fixing described ground loop also comprises: described conducting bolt extends through the described hole of described flow meter body and the described aperture of described ground loop.
Preferably, the step of fixing described ground loop comprises: by the described bolt welding of each fixation kit on described ground loop.
Accompanying drawing explanation
Above-mentioned and other targets, feature and advantage of the present invention clearly can be understood by the detailed description of carrying out below in conjunction with accompanying drawing, wherein:
Fig. 1 is the schematic diagram of the prior art electromagnetic flowmeter with ground-electrode;
Fig. 2 is the schematic diagram of another prior art electromagnetic flowmeter with the ground loop fixed by flange coupling;
Fig. 3 illustrates the sectional view of electromagnetic flowmeter according to an embodiment of the invention, this sectional view show its ground connection layout;
The A-A sectional view that Fig. 4 is the electromagnetic flowmeter shown in Fig. 3;
Fig. 5 illustrates an example of the part according to ground loop of the present invention;
Fig. 6 illustrates for the protection of and strengthens an example of a part for the shell of flow meter body;
Fig. 7 shows two-part ground loop illustratively and is welded to an example of the bolt on this ground loop;
Fig. 8 a shows unistage type ground loop illustratively and is welded to an example of the bolt on this ground loop;
Fig. 8 b is the enlarged drawing of the part " A " in Fig. 8 a;
Fig. 9 a shows unistage type ground loop illustratively and is welded to an example of the bolt on this ground loop; And
Fig. 9 b is the enlarged drawing of the part " B " in Fig. 9 a.
List of reference characters
1 electromagnetic flowmeter 2 bolt
3 ground loop 4 bonding agents
5 cables 6 are for covering the outer cover of cable
7 base 8O shape rings
9 solder packing ring 10 nuts
11 groove 12 shells
13 flow meter body 14 fixation kits
The hole of 15 bolt head 16 flow meter body
Aperture 18 recess of 17 ground loops
20 ground-electrode 21 ground loops
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described.The problem defined in this manual, as detailed structure and key element, is only be provided for subsidiary book exercising ordinary skill complete understanding detail of the present invention, therefore the present invention is not limited thereto.
Fig. 3 and Fig. 4 shows the electromagnetic flowmeter having novel ground connection and arrange according to an embodiment of the invention.As shown in the figure, electromagnetic flowmeter 1 comprises stream of plastic gauge main body 13.This flow meter body 13 for connecting at two ends place, such as, welds, on pipeline (not shown).When the fluid from pipeline is by flow meter body 13, electromagnetic flowmeter 1 can measure the flow velocity of fluid.
In order to ensure the accuracy of measuring, be necessary for eliminating the earthing device of electromagnetic interference (EMI).In this embodiment, ground loop 3 is accommodated in the groove 11 of flow meter body 13.Groove 11 is configured to annular groove along the inner periphery of flow meter body 13.The size and dimension of ground loop 3 is configured, and can be placed in securely in groove 11 to make ground loop 3.
Be in operation, ground loop 3 for by the conductive fluid electrical contact of flow meter body 13, thus the current potential of this fluid can be made to equal the current potential of external ground point (not shown).In an example, the thickness of ground loop 3 corresponds to the degree of depth of groove 11, thus ground loop 3 is flushed with the inwall of flow meter body 13.In this way, ground loop 3 can not fluid in flow meter main body 13 by having an impact.
Two fixation kits 14 are provided, so that the ground loop be accommodated in groove 11 3 is fixed on flow meter body 13, and ground loop 3 are electrically connected on external ground point.
Utilize this ground connection to arrange, do not need to configure flange according to electromagnetic flowmeter of the present invention.Meanwhile, ensure that the accuracy of measurement of earthing effect and electromagnetic flowmeter.
Embodiment above describes the situation comprising a ground loop 3.But, should point out, multiple ground loop 3 can be configured along the longitudinal direction of flow meter body 13.Such as, another ground loop 3 can also be arranged on another opposite end of flow meter body 13.In that case, multiple groove 11 and fixation kit 14 can correspondingly be configured.
Stream of plastic gauge main body 13 has radially across flow meter body 13 and extends to two holes 16 of groove 11.Ground loop 3 has two apertures 17.When ground loop 3 is placed in groove 11, the aperture 17 of ground loop 3 is aimed at the hole 16 of flow meter body 13.Configure two conducting bolts 2 through the hole 16 of flow meter body 13 and the aperture 17 of ground loop 3.Two nuts 10 are screwed onto on bolt 2 respectively.In this way, ground loop 3 is fixedly secured on the groove 11 of flow meter body 13.
Bolt 2 can be the weld assembly formed by two parts, and one of them parts is the head 15 manufactured by punching, and another parts are the threaded mechanical component of tool.But bolt 2 can also be the single-piece part formed by casting or additive method.According to an expansion embodiment of the present invention, bolt 2 can partly be welded on ground loop 3.
The head 15 of bolt 2 can be made up of corrosion-resistant material.Other parts of bolt 2 can be made up of more cheap material.Manufacturing cost can be saved further like this.
In an example of the present invention, ground loop 3 can be made up of the two halves of symmetry.As shown in Figure 5, every half all has two half-round recessed at two ends place.When half and second half fit together time, two recesses in described half and described two sets of recesses on second half are fitted together, thus form two annular orifice 17.The ground loop 3 of this structure is easy to manufacture, and meanwhile also contributes to ground loop 3 and puts into groove 11.
Ground loop 3 can also be the single-piece part with two diametrically relative apertures 17.Ground loop 3 also can have less than two or plural aperture 17.In this case, may correspond to configuration less than two or plural fixation kit 14, and less than two or plural bolt 2.
In one embodiment of the invention, ground loop 3 can be configured to not have the aperture that bolt 2 passes.On the contrary, one or more bolt 2 is soldered on ground loop 3.As shown in Figure 7, in an example, ground loop 3 is two-part rings, each section is welded with bolt 2.At the two ends of each section, there is inclined-plane.When fitting together for these two sections, inclined-plane contacts with each other, and makes ground loop 3 form continuous print ring.
In another example, as figures 8 a and 8 b show, ground loop 3 is unistage type ring, and this ring has two relative inclined-planes and is welded with two bolts 2.In yet another embodiment, as shown in figures 9 a and 9b, ground loop 3 is unistage type ring, and this ring has two relative inclined-planes and is only welded with a bolt 2.
Ground loop 3 is made up of conductive material.This conductive material is preferably erosion-resisting.
Fixation kit 14 comprises the seal between bolt 2 and nut 10, to seal the hole 16 of flow meter body 13.In this way, avoid fluid to leak from hole 16.
The seal can comprise base 7, by the O shape ring 8 be pressed between base 7 and flow meter body 13.The seal may further include the bonding agent 4 be filled in base 7.In this way, sealing effectiveness is improved.Should point out, those of ordinary skill in the art will understand, and other encapsulating methods also can be applied in fixation kit 14.
In a preferred embodiment, flow meter body 13 comprises the recess 18 on the excircle of flow meter body 13, and the position of this recess 18 is corresponding with hole 16, and the seal of a part is accommodated in recess 18.Because the seal of a part is placed in the recess 18 of surrounding hole, sealing effectiveness is promoted further.
Because groove 11 is located on flow meter body 13, so flow meter body 13 may be weakened to a certain extent.In a preferred embodiment, also comprise shell 12, corresponding to the position of groove 11, described shell 12 surrounds flow meter body 13.Therefore, although there is groove 11, flow meter body 13 is still reinforced in this position.Shell 12 can also provide protection for fixation kit 14, thus dust and other foreign matters cannot be entered in fixation kit 14 with the sealing effectiveness of the grounding connection and seal that affect fixation kit 14.
Fig. 6 illustrates for the protection of and strengthens a part for an example of the shell 12 of flow meter body 13.As shown in the figure, shell 12 comprises the band of two substantially semicirculars in shape, and for two sockets of a part of receiving fixation kit 14.Shell 12 can be the welding assembly formed by some assemblies.Shell 12 can also be single-piece part.
As shown in Figure 3, shell 12 can be configured to be communicated with the outer cover 6 for covering cable 5 further, and this cable is for being electrically connected to external ground point by fixation kit 14.Therefore, can prevent from outside stube cable 5 is exposed on, prevents from thus affecting outward appearance and preventing cable to be destroyed.This also further ensures earthing effect.
Fixation kit 14 can be connected on external ground point or flowmeter transmitters by cable 5.Fixation kit 14 may further include solder packing ring 9.One end of cable 5 is connected on solder packing ring 9, and the other end of cable 5 is connected on external ground point.
Should point out, the present invention is not limited to the electromagnetic flowmeter with stream of plastic gauge main body described by above embodiment.Such as, the present invention can also be applied to the electromagnetic flowmeter with the flow meter body be made up of other materials (such as metal or pottery).
According to another aspect of the present invention, a kind of earthing method for electromagnetic flowmeter 1 is provided.The method comprises:
At the inner periphery place of the flow meter body 13 of described electromagnetic flowmeter 1, annular groove 11 is set;
Ground loop 3 is placed in described groove 11, with the conductive fluid electrical contact through described flow meter body 13;
By at least one fixation kit 14, the described ground loop 3 be placed in described groove 11 is fixed on described flow meter body 13; And
By at least one fixation kit 14, described ground loop 3 is electrically connected on external ground point.
The detailed description of described method with reference to the embodiment of aforementioned means, will can no longer repeat similar explanation herein.
Utilize the earthing method of this embodiment, do not need to configure flange, and meanwhile, the measurement accuracy of earthing effect and electromagnetic flowmeter is guaranteed and improves.
Should point out, although only describe the situation only having a ground loop 3 in above-described embodiment, the configurable multiple ground loop 3 of flow meter body 13.Such as, two ground loops 3 can be configured at the two ends of flow meter body 13.In the case, correspondingly configuration more other assemblies, such as groove 11, fixation kit 14, to coordinate multiple ground loop 3.
The invention provides and a kind of there is electromagnetic flowmeter that novel ground connection arranges and the earthing method for this electromagnetic flowmeter.This electromagnetic flowmeter comprises: flow meter body, and described flow meter body within it circumference place has annular groove; Ground loop, described ground loop is configured to be accommodated in described groove, wherein said ground loop be in operation for through the conductive fluid electrical contact of flow meter body; And at least one fixation kit, described fixation kit is configured to storage ground loop to be in a groove fixed on flow meter body, and is electrically connected on external ground point by described ground loop.This being different from is utilized to use ground-electrode or the novel grounded layout of ground loop of being fixed by flange and method thereof, between ground loop with corresponding fluid, establish larger contact area, and the accuracy of measurement of earthing effect and electromagnetic flowmeter is guaranteed and promotes.
Although in order to illustrative object describes the preferred embodiments of the present invention, but those of ordinary skill in the art will understand, under the prerequisite not departing from the scope and spirit of the present invention disclosed in appended claims, various amendment, interpolation and replacement can be made.
Claims (21)
1. an electromagnetic flowmeter (1), is characterized in that, comprising:
Flow meter body (13), described flow meter body (13) within it circumference place has at least one annular groove (11), and described flow meter body (13) also has at least one hole (16);
At least one ground loop (3), described at least one ground loop (3) is incorporated in described at least one groove (11), and wherein ground loop described in each (3) is in operation and the conductive fluid electrical contact by described flow meter body (13); And
At least one fixation kit (14), described ground loop (3) for the described ground loop (3) be incorporated in described groove (11) being fixed to described flow meter body (13) by means of described hole (16), and is electrically connected on external ground point by described fixation kit (14).
2. electromagnetic flowmeter according to claim 1, is characterized in that,
Described hole (16) is radially across described flow meter body (13) and extend to described groove (11); And
Fixation kit described in each (14) comprises conducting bolt (2) and nut (10), described conducting bolt (2) extends through the described hole (16) of described flow meter body (13), and described nut (10) is screwed onto on described bolt (2).
3. electromagnetic flowmeter according to claim 2, is characterized in that,
Ground loop described in each (3) has at least one aperture (17), and described at least one aperture (17) is aimed at described at least one hole (16) of described flow meter body (13); And
The described conducting bolt (2) of fixation kit described in each (14) extends through the described hole (16) of described flow meter body (13) and the described aperture (17) of described ground loop (3).
4. electromagnetic flowmeter according to claim 2, is characterized in that, the described bolt (2) of each described fixation kit (14) is soldered on described ground loop (3).
5. the electromagnetic flowmeter according to claim 1 or 4, it is characterized in that, described ground loop (3) is made up of the two halves of symmetry, every half has two inclined-planes at two ends place, and when half and second half fit together time, described two inclined-planes in described half complementally contact with described two inclined-planes on second half, thus make described two halves form continuous print ring.
6. the electromagnetic flowmeter according to claim 1 or 4, is characterized in that,
Described ground loop (3) is single-piece part, and comprises the breaking part with two inclined-planes; And
When described ground loop (3) is incorporated in described groove (11), described two inclined-planes contact complimentary to one anotherly.
7. the electromagnetic flowmeter according to claim 1 or 3, it is characterized in that, described ground loop (3) is made up of the two halves of symmetry, every half has two recesses at two ends place, and when half and second half fit together time, described two recesses in described half and described described two sets of recesses on second half are fitted together, thus form two apertures (17).
8. the electromagnetic flowmeter according to any one of claim 2 to 4, it is characterized in that, described fixation kit (14) also comprises the seal be positioned between described bolt (2) and described nut (10), for sealing the described hole (16) of described flow meter body (13).
9. electromagnetic flowmeter according to claim 8, is characterized in that, described seal comprises base (7), and by the O shape ring (8) be pressed between described base (7) and described flow meter body (13).
10. electromagnetic flowmeter according to claim 9, is characterized in that, described seal also comprises the bonding agent (4) be filled in described base (7).
11. electromagnetic flowmeters according to claim 8, it is characterized in that, described flow meter body (13) also comprises the recess (18) on the excircle being positioned at described flow meter body (13), the position of described recess (18) corresponds to described hole (16), and a part for described seal is incorporated in described recess (18).
12. electromagnetic flowmeters according to claim 1, is characterized in that, also comprise shell (12), and described in the position corresponding to described groove (11), shell (12) surrounds described flow meter body (13).
13. electromagnetic flowmeters according to claim 1, is characterized in that, the thickness of described ground loop (3) corresponds to the degree of depth of described groove (11).
14. electromagnetic flowmeters according to Claims 2 or 3, it is characterized in that, the head (15) of described bolt (2) is made up of corrosion-resistant material.
15. electromagnetic flowmeters according to claim 12, it is characterized in that, described shell (12) is communicated with the outer cover (6) for covering cable (5), and described cable (5) is for being electrically connected to described external ground point by described fixation kit (14).
16. electromagnetic flowmeters according to claim 1, is characterized in that, described fixation kit (14) also comprises solder packing ring (9), and described solder packing ring (9) is for being connected to described external ground point.
17. electromagnetic flowmeters according to any one of claim 1,2,3,4,12,13 and 16, it is characterized in that, described flow meter body (13) is made up of plastic material.
18. 1 kinds, for the earthing method of electromagnetic flowmeter (1), is characterized in that, described method comprises:
At the inner periphery place of the flow meter body (13) of described electromagnetic flowmeter (1), at least one annular groove (11) is set, further, at least one hole (16) are formed in described flow meter body (13);
At least one ground loop (3) is accommodated in described at least one groove (11), with the conductive fluid electrical contact through described flow meter body (13);
By at least one fixation kit (14), by means of described hole (16), by being accommodated in described groove (11) described in each, ground loop (3) is fixed on described flow meter body (13); And
By described at least one fixation kit (14), ground loop described in each (3) is electrically connected on external ground point.
19. earthing methods according to claim 18, is characterized in that,
Described hole (16) is radially across described flow meter body (13) and extend to described groove (11); And
The step of described fixing described ground loop (3) also comprises: the conducting bolt (2) of fixation kit described in each (14) extends through the described hole (16) of described flow meter body (13), and is screwed on described bolt (2) by nut (10).
20. earthing methods according to claim 19, is characterized in that,
At least one aperture (17) is formed in described ground loop (3), and described at least one aperture (17) is aimed at described at least one hole (16) of described flow meter body (13); And
The step of described fixing described ground loop (3) also comprises: described conducting bolt (2) extends through the described hole (16) of described flow meter body (13) and the described aperture (17) of described ground loop (3).
21. earthing methods according to claim 19, it is characterized in that, the step of described fixing described ground loop (3) also comprises: be welded on described ground loop (3) by the described bolt (2) of fixation kit described in each (14).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/078579 WO2013023378A1 (en) | 2011-08-18 | 2011-08-18 | Electromagnetic flow meter and grounding method of the same |
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| Publication Number | Publication Date |
|---|---|
| CN103649690A CN103649690A (en) | 2014-03-19 |
| CN103649690B true CN103649690B (en) | 2016-02-17 |
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| WO (1) | WO2013023378A1 (en) |
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| JP7039276B2 (en) * | 2017-12-15 | 2022-03-22 | アズビル株式会社 | Electrode for detecting potential of electromagnetic flow meter |
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| WO2013023378A1 (en) | 2013-02-21 |
| CN103649690A (en) | 2014-03-19 |
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