CN201974196U - Electrode structure of electromagnetic flowmeter sensor - Google Patents
Electrode structure of electromagnetic flowmeter sensor Download PDFInfo
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- CN201974196U CN201974196U CN2011200624011U CN201120062401U CN201974196U CN 201974196 U CN201974196 U CN 201974196U CN 2011200624011 U CN2011200624011 U CN 2011200624011U CN 201120062401 U CN201120062401 U CN 201120062401U CN 201974196 U CN201974196 U CN 201974196U
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Abstract
The utility model provides an electrode structure of an electromagnetic flowmeter sensor; the electromagnetic flowmeter sensor comprises a ceramic measuring pipe; the electrode structure comprises a pair of electrode plugholes and a pair of electrode members, wherein the pair of electrode plugholes are arranged at opposite ends of the ceramic measuring pipe in opposite directions, are protruded from the ceramic measuring pipe and are boss-shaped; the pair of electrode members are arranged in the electrode plugholes in a corresponding way; therefore, electrodes and the ceramic measuring pipe are tightly combined so as to avoid fluid in the ceramic measuring pipe from leaking along a tiny gap between the electrodes and the measuring pipe and overcome the problem of electrode leakage.
Description
Technical field
The utility model relates to electromagnet flow meter sensor, especially, relates to a kind of electrode structure that can avoid the ceramic pipe electromagnet flow meter sensor of electrode seepage.
Background technology
Electromagnetic flowmeter is to utilize the flow of the detected fluid with electric conductivity that electromagnetic induction phenomenon will flow in measuring tube to be converted to the device that electric signal is measured.
Fig. 1 has shown the structure of a kind of electromagnetic flowmeter of the prior art.As shown in Figure 1, described electromagnetic flowmeter comprises: flowing has the measuring tube 11 of detected fluid, with contact with detected fluid and subtend is configured in electrode 12a, 12b on the measuring tube 11, apply the field coil 13 in magnetic field to detected fluid, supply with exciting currents, make it produce the power supply unit 14 in magnetic field to field coil 13.In addition, described electromagnetic flowmeter also comprises: be connected the signal conversion unit 15 that is used for the induction electromotive force between detecting electrode 12a, the 12b with electrode 12a, 12b, from calculated the flow output unit 16 of the flow of detected fluid by electromotive force between signal conversion unit 15 detected electrodes.
Use described electromagnetic flowmeter, when fluid passes the magnetic field that is produced by field coil 13 and flows in measuring tube 11, according to Faraday's law, will on electrode 12a, 12b, produce induction electromotive force, have linear relationship between the voltage that the mean flow rate of fluid and electrode place induce, this relation can be used following formulate: E=K*B*D*V, wherein E is the induced voltage that is produced, and K is a proportionality constant, and B is a magnetic field intensity, D is a conduit diameter, and V is the mean flow rate of conduction type fluid.Like this, utilize signal conversion unit 15 and flow output unit 16, can record the flow rate of fluid corresponding, and then obtain the flow of fluid with described induction electromotive force.
The ceramic pipe electromagnet flow meter sensor has many good qualities, but the electrode sealing is a very hang-up.Fig. 2 is the cut-away view of arranging in order to show electrode along perpendicular plane, the magnetic field that produces with field coil 13 among Fig. 1.As Fig. 2, measuring tube 11 is provided with electrode jack 110, and described electrode jack 110 is cylindrical or conical, and its thickness roughly wall thickness with measuring tube 11 is suitable, and electrode (only indicating electrode 12a here) is embedded in the electrode jack 110 of measuring tube 11.Yet the electrode in shown in Figure 2 has only minority producer to possess special sintering technology, and it is non-leakage to guarantee electrode to produce electrode under high temperature and high pressure environment, realizes that difficulty is very big.And mechanical fitting tights such as employing O type circle, because the ceramic material surfaces certain thickness can become tide, service time one is long, insulativity will descend, and influences measuring accuracy.
The utility model content
The purpose of this utility model is to provide a kind of electrode structure that can avoid the ceramic pipe electromagnet flow meter sensor of electrode seepage, electrode occurs with the electrode structure that solves ceramic pipe electromagnet flow meter sensor in the prior art in long-term work and becomes tide even leakage problems.
The utility model provides a kind of electrode structure of electromagnet flow meter sensor, described electromagnet flow meter sensor includes ceramic measuring tube, and described electrode structure comprises: subtend is configured in the pair of electrodes jack and the corresponding pair of electrodes member that is disposed in the described electrode jack of described ceramic measuring tube opposite end; Described electrode jack is that evagination is the boss shape in described ceramic measuring tube.
Alternatively, the counter bore structure that described electrode jack contracts and extends out in being, comprise the first jack section of the internal face that points to described ceramic measuring tube and link to each other, point to the second jack section of the outside wall surface of described ceramic measuring tube with the described first jack section, the aperture of the described second jack section is greater than the aperture of the described first jack section; Described electrode member comprises electrode plug, the electrode pressure cap in the second jack section of described electrode jack and the conductive glass powder between described electrode plug and described electrode pressure cap in the first jack section of described electrode jack.
Alternatively, the joint face of the first jack section of described electrode jack and the second jack section is plane or circular conical surface.
Alternatively, described electrode member comprises that being arranged in described electrode jack closes on the conductive glass powder of described ceramic measuring tube internal face and be arranged in the electrode pressure cap that described electrode jack closes on described ceramic measuring tube outside wall surface.
Alternatively, described electrode structure also comprises the opening part position limiting structure that is positioned at described electrode jack, described position limiting structure is unidirectional spacing, is used to avoid described electrode pressure cap to break away from described electrode jack, but allows the electrode pressure cap is compressed to described ceramic measuring tube internal face.
Alternatively, described position limiting structure comprises the limiting section that is positioned at described electrode jack outside wall surface and is fastened on the described electrode jack termination, has a gland of the screens portion that cooperates with described limiting section.
Alternatively, described limiting section is a spacing block set.
Alternatively, described position limiting structure comprises limiting section that is positioned at described electrode jack internal face and the electrode pressure cap that cooperates with described limiting section.
Alternatively, described limiting section is a spacing block set.
Alternatively, described electrode pressure cap also comprises: be located at the outside wall surface of described electrode pressure cap, the chute corresponding with described spacing block set; Be located at the outside wall surface of described electrode pressure cap, be the annular slot at center with the rotating shaft of described electrode pressure cap; And the screens portion that on described annular slot, has certain rotation gradient.
In sum, the electrode structure of the utility model electromagnet flow meter sensor can be sintered to electrode member and measuring tube integratedly, makes and combines closely between electrode and the measuring tube, prevents that leakage problems from appearring in electrode.
Description of drawings
Fig. 1 is the structural representation of a kind of electromagnetic flowmeter of the prior art;
Fig. 2 is the cut-away view that show electrode is arranged among Fig. 1;
Fig. 3 cuts open figure along cutting radially for electromagnet flow meter sensor of the present utility model in first embodiment;
Fig. 4 cuts open figure for Fig. 3 cuts along A-A did;
Fig. 5 cuts open figure along cutting radially in a second embodiment for electromagnet flow meter sensor of the present utility model;
Fig. 6 cuts open figure for Fig. 5 cuts along B-B did;
Fig. 7 a and Fig. 7 b are respectively the structural representation of the gland that has the electrode jack of limiting section among Fig. 5 and Fig. 6 and cooperate with it;
Fig. 8 cuts open figure along cutting radially for electromagnet flow meter sensor of the present utility model in the 3rd embodiment;
Fig. 9 cuts open figure for Fig. 7 cuts along C-C did;
Figure 10 a and Figure 10 b are respectively the structural representation of the electrode pressure cap that has the electrode jack of limiting section among Fig. 8 and Fig. 9 and cooperate with it;
Figure 11 cuts open figure along cutting radially for electromagnet flow meter sensor of the present utility model in the 4th embodiment;
Figure 12 cuts open figure for Figure 11 cuts along D-D did;
The ceramic measuring tube structure structural representation in one embodiment that Figure 13 provides for the electromagnet flow meter sensor that is used for making Figure 11 the 4th embodiment;
The ceramic measuring tube structure that Figure 14 provides for the electromagnet flow meter sensor that is used for making Figure 11 the 4th embodiment changes structural representation in example at another.
Embodiment
In view of existing ceramic measuring tube electromagnetic flowmeter provides the thickness cylindrical or conical electrode jack suitable with the ceramic measuring tube wall thickness, cause electrode structure to have manufacture craft difficulty height, be prone to problems such as electrode seepage.Therefore, inventor of the present utility model has creatively done improvement to existing ceramic measuring tube electromagnetic flowmeter, a kind of electrode structure of novel electromagnet flow meter sensor is provided, mainly be that opposite end subtend at ceramic measuring tube has disposed the pair of electrodes jack (degree of depth of described electrode jack is greater than the pipe thickness of described ceramic measuring tube) that is the boss shape, in described electrode jack, electrode is set, so, can be so that combine closely between electrode and the ceramic measuring tube, the fluid of avoiding ceramic measuring tube overcomes the electrode leakage problems along the fine gap seepage between electrode and the measuring tube.
Below will come the electrode structure of electromagnet flow meter sensor of the present utility model is elaborated by specific embodiment.
First embodiment:
See also Fig. 3 and Fig. 4, wherein, Fig. 3 has shown that electromagnet flow meter sensor of the present utility model cuts open figure along cutting radially in first embodiment; Fig. 4 cuts open figure for Fig. 3 cuts along A-A did.
In conjunction with Fig. 3 and Fig. 4, described electromagnet flow meter sensor comprises: flowing has the ceramic measuring tube 20 of detected fluid; Be positioned at two ends of ceramic measuring tube 20, the flange of conduct sealing usefulness; Subtend is configured in ceramic measuring tube 20 along the opposite end of caliber, evagination is the boss shape in described ceramic measuring tube pair of electrodes jack 22; Cooperate the electrode member 24 that is assembled on the ceramic measuring tube 20 with electrode jack 22.
Especially, in electromagnet flow meter sensor of the present utility model, pair of electrodes jack 22 evaginations that subtend is configured in ceramic measuring tube 20 opposite ends are the boss shape in described ceramic measuring tube.With respect to the suitable prior art of (close or equate) of the pipe thickness of the degree of depth of electrode jack and ceramic measuring tube, the degree of depth of the electrode jack 22 in the present embodiment will be much larger than the pipe thickness of (more than 2 times) ceramic measuring tube 20.Particularly, the counter bore structure that electrode jack 22 contracts and extends out in being comprises the first jack section 220 that points to ceramic measuring tube 20 internal faces and links to each other, points to the second jack section 222 of ceramic measuring tube 20 outside wall surface with the first jack section 220.Wherein, that end face away from the second jack section 222 is to flush with ceramic measuring tube 20 internal faces in the first jack section 220.The first jack section 220 is cylindric or coniform (narrow outer wide in being); The second jack section 222 cylindrical or conical (narrow outer wide in being); The joint face of the second jack section 222 and the first jack section 220 is plane or circular conical surface, preferably, is circular conical surface.
Making at electrode jack 22, in one embodiment, thereby can be before the sintering process of ceramic measuring tube 20, to be reserved with the structure corresponding behind sintering process, to form, form electrode jack 22 thereby for example adopted the mould corresponding and behind sintering process, removed described mould with electrode jack to be formed with electrode jack 22; Perhaps, in another embodiment, also can be subsequent machining technology such as for example to dig on through the ceramic measuring tube 20 behind the sintering process again and form electrode jack 22.In fact, as long as can produce the ceramic pipe with electrode jack, its concrete manufacture craft is not limited to above-mentioned description, still other variation can be arranged, so do not repeat them here.
Electrode member 24 comprises electrode plug 240, the electrode pressure cap 244 in the second jack section 222 of electrode jack 22 and the conductive glass powder 242 between electrode plug 240 and electrode pressure cap 244 in the first jack section 220 of electrode jack 22.
In first embodiment, the process of making electrode member 24 in electrode jack 22 is divided into two and goes on foot, the first step is finished the making of first electrode member 24: in second step, finish the making of second electrode member 24 in another electrode jack 22 therein in electrode jack 22.
Wherein the manufacturing process of each electrode member is subdivided into following steps again:
At first, provide electrode plug 240, electrode plug 240 plants are gone in the electrode jack 22.In the present embodiment, electrode plug 240 is roughly a plug structure, comprises electrode plug section and the electrode cap top that is connected with described electrode plug section.The structure of described electrode plug section is corresponding with the first jack section 220, is conical.Described electrode cap top is connected with described electrode plug section, and in one embodiment, described electrode cap top is that the tail end by described electrode plug section expands outwardly and to extend the back integrated.The coupling part at described electrode plug section and described electrode cap top and the joint face of the first jack section 220 and the second jack section 222 are corresponding, preferably, are circular conical surface.The tail end at described electrode cap top has flange, and described flange has the contoured surface that is made of groove and boss, thereby can increase contact area relatively.When electrode plug 240 being assembled to the first jack section 220 of ceramic measuring tube 20, electrode plug 240 keeps closely contacting with the first jack section 220.Particularly, described electrode plug section is to be arranged in the first jack section 220, the front end face of electrode plug 240 wherein is to flush (neither protrude and also do not cave in) with the internal face of ceramic measuring tube 20, so, in use, can avoid fluid the washing away and wear and tear in the ceramic measuring tube 20 to electrode plug 240, not only can prolong the serviceable life of electrode plug 240, also can avoid electromagnetic flowmeter collision because of fluid in the ceramic measuring tube 20 and electrode plug 240 when work to produce extra noise.The electrode cap top of electrode plug 240 then is arranged in the second jack section 222 of part, and position-limiting action can be played in described electrode cap top, prevent electrode plug 240 by on vertically insert the first jack section 220 back and drop naturally.
The manufacturing materials of first electrode plug 240 can have multiple choices, and in some cases, described manufacturing materials can be a metal, for example is stainless steel 316L or precious metal alloys, preferably, is platinumiridio.
Then, at the rear end of electrode plug 240 filled conductive glass powder 242.In the present embodiment, can also utilize the outside terminal compacting conductive glass powder 242 that bears down on one to carry out precompression and handle.
Then, insert the electrode pressure cap 244 that compresses with conductive glass powder 242 in the rear end of electrode plug 240.In the present embodiment, electrode pressure cap 244 comprises the portion of bearing down on one and the tops that is connected with the described portion of bearing down on one, the aperture of the aperture of the described portion of bearing down on one and the second jack section 222 is complementary, the aperture of described tops is greater than the aperture of the second jack section 222, when the first electrode pressure cap 244 is assembled to electrode jack 22, the described portion of bearing down on one is arranged in the second jack section 222 and presses on conductive glass powder 242, and described tops then is positioned at the outer end of the second jack section 222 of the first jack section 220.For realizing that wherein conductive glass powder 242 is more closely compressed effect, more preferably, that end that the portion of bearing down on one of electrode pressure cap 244 presses on conductive glass powder 242 also is threaded or corner angle.In the present embodiment, the manufacturing materials of electrode pressure cap 244 can be metal (for example being stainless steel or precious metal alloys).
At last, the above-mentioned ceramic measuring tube 20 that is equipped with electrode plug 240, conductive glass powder 242 and electrode pressure cap 244 is placed under the hot environment in the heating furnace carries out heat treated, and be heated to conductive glass powder 242 softening temperature in addition more than, make that conductive glass powder 242 is softening, be in molten condition; Ceramic measuring tube 20 is taken out in heating furnace and pressure welding, described pressure welding comprises: apply big pressure on electrode pressure cap 244, make electrode pressure cap 244 be pressed into further in the electrode jack 22, conductive glass powder 242 is through pressurized compacting and flow and be filled in gap between electrode pressure cap 244 and the electrode jack 22 and the gap between electrode plug 240 and the electrode jack 22; Utilize pressure welding, thereby under high pressure conditions, the electrode jack 22 of electrode plug 240, conductive glass powder 242, electrode pressure cap 244 and ceramic measuring tube 20 is welded together, make the high-intensity electrode member 24 of high-compactness.
Need to specify and be, in first embodiment, owing to two electrode members 24 successively complete in batches in regular turn, therefore, can adopt two kinds of conductive glass powder, thereby make that to add the temperature conditions of pining for heating at twice inequality with different softening temperatures.The softening temperature of the second class conductive glass powder the when softening temperature of the first kind conductive glass powder when generally speaking, making first electrode member 24 will compare second electrode member 24 of making comes higherly.For example: the softening temperature of first kind conductive glass powder is 1100 ℃ to 1200 ℃, and therefore, the heating-up temperature when making first electrode member 24 is 1100 ℃ to 1200 ℃; And the softening temperature of the second class conductive glass powder is 800 ℃ to 900 ℃, and the heating-up temperature of therefore making second electrode member 24 is 800 ℃ to 900 ℃.Above-mentioned only is exemplary illustration, not as limit, in actual applications, still can do other change.
Second embodiment:
See also Fig. 5 and Fig. 6, wherein, Fig. 5 has shown that electromagnet flow meter sensor of the present utility model cuts open figure along cutting radially in a second embodiment; Fig. 6 cuts open figure for Fig. 5 cuts along B-B did.
In conjunction with Fig. 5 and Fig. 6, described electromagnet flow meter sensor comprises: flowing has the ceramic measuring tube 30 of detected fluid; Be positioned at two ends of ceramic measuring tube 30, the flange of conduct sealing usefulness; Subtend is configured in ceramic measuring tube 30 along the opposite end of caliber, evagination is the boss shape in described ceramic measuring tube pair of electrodes jack 32; Cooperate the electrode member 34 that is assembled on the ceramic measuring tube 30 with electrode jack 32.Electrode jack 32 comprises the first jack section 320 that points to ceramic measuring tube 30 internal faces and links to each other, points to the second jack section 322 of ceramic measuring tube 30 outside wall surface with the first jack section 320 that electrode member 34 comprises electrode plug 340, the electrode pressure cap 344 in the second jack section 322 of electrode jack 32 and the conductive glass powder 342 between electrode plug 340 and electrode pressure cap 344 in the first jack section 320 of electrode jack 32.
Especially, compare with first embodiment, in a second embodiment, electrode member 34 also comprises the second electrode section, 322 opening parts that are positioned at electrode jack 32, the position limiting structure that is used to avoid electrode pressure cap 344 disengaging electrode jacks 32.In a second embodiment, described position limiting structure comprises: be positioned at the limiting section 37 of electrode jack 32 outside wall surface and cooperate, be fastened on gland 36 on electrode jack 32 terminations with limiting section 37.For example, gland 36 constitutes (the screens portion that gland 36 is stretched in being provided with that is clasped with electrode jack 32, the outside wall surface of electrode jack 32 is provided with the limiting section 37 that for example rotates the spacing block set of the gradient for band), after gland 36 is fastened on the electrode jack 32, the screens portion of gland 36 matches with the limiting section 37 of electrode jack 32, can realize: after assembling is finished, gland 36 can carry out spacingly to being positioned over electrode pressure caps 344 in the electrode jack 32, avoids electrode pressure cap 344 to break away from electrode jacks 32.In addition, preferably, in a second embodiment, described position limiting structure can be realized unidirectional spacing function, allows the internal face of electrode pressure cap 344 to ceramic measuring tube 30 compressed.Particularly, after gland 36 was fastened on the electrode jack 32, gland 36 also had such characteristics: have certain displacement space under the situation that can not break away from electrode jack 32.Specifically, when the radially inner pressure that applies to electrode pressure cap 344 along ceramic measuring tube 30, can inwardly compress with certain displacement stroke along described radial direction; Thereby and electrode pressure cap 344 is limited in to exert pressure is pressed into the state of conductive powder being subjected to playing when ceramic measuring tube 30 internal pressures are impelled electrode pressure cap 344 along radially outward the ejecting of ceramic measuring tube 30 position-limiting action.
Fig. 7 a and Fig. 7 b have shown limiting section 37 among Fig. 5 and Fig. 6 and gland 36 structural representation in one embodiment that cooperates with it respectively.In conjunction with Fig. 7 a and Fig. 7 b, limiting section 37 is located on the outside wall surface of electrode jack 32, particularly, limiting section 37 for have certain rotation gradient and symmetrically arranged two spacing block sets (in the following description, spacing block set is indicated with 37), and leaving certain gaps uncovered by the economic plan between two described spacing block sets 37.Correspondingly, gland 36 is the lid of inner hollow, stretch in empty therein inside is provided with, with two corresponding screens portions 361 of spacing block set 37 on electrode jack 32 outside wall surface.Preferably, screens portion 361 also can be designed as and has certain rotation gradient.When using, at first, radially inwardly pushing along ceramic measuring tube 30 behind the breach that two screens portions 361 of gland 36 aim between two spacing block sets 37; Then, after pushing certain distance, the rotation gradient of gland 36 along spacing block set 37 is rotated, utilizes the effect of the spacing block set 37 of the screens portion 361 of gland 36 and electrode jack 32, be clasped thereby make gland 36 constitute with electrode jack 32, realization is spacing to electrode pressure cap 344.
Compared to once assembling an electrode, heat again and pressure welding, make two electrode members 24, first embodiment of manufacture craft in two steps, in a second embodiment, since especially provide have position-limiting action position limiting structure (in the present embodiment, described position limiting structure comprises the gland 36 with screens portion and is positioned at electrode jack 32 outside wall surface, for example is the limiting section 37 of the spacing block set of the band rotation gradient), thus make that making electrode member 34 can carry out simultaneously two electrode jacks 32 in.Like this, only need once assemble two electrodes, heating simultaneously again, pressure welding simultaneously can be finished the making of electrode member 34, has simplified production technology and cycle.
Specifically, in a second embodiment, the process of making electrode member 34 in electrode jack 32 comprises: earlier electrode plug 340 is inserted in the first jack section 320 of electrode jack 32, at electrode plug 340 rear end filled conductive glass powders 342, and electricity consumption extreme pressure cap 344 compacting conductive glass powder 342; Gland 36 is assembled on the electrode jack 32, covers and compress tight conductive glass powder 342 and electrode pressure cap 344 carries out spacing; The above-mentioned ceramic measuring tube 30 that is equipped with electrode plug 340, conductive glass powder 342 and electrode pressure cap 344 is placed under the hot environment in the heating furnace carries out heat treated, because the position-limiting action of gland 46 is pressed in conductive glass powder 342 in heating process in the space between electrode plug 340 and the electrode pressure cap 344 all the time; Be heated to softening temperature even above (heating-up temperature is decided according to the softening temperature of the conductive glass powder in the practical application, for example is 800 ℃ to 1200 ℃) of conductive glass powder 342, make that conductive glass powder 342 is softening, be in molten condition; Ceramic measuring tube 30 is taken out in heating furnace and pressure welding, described pressure welding comprises: apply big pressure on electrode pressure cap 344, make electrode pressure cap 344 be pressed into further in the electrode jack 32, conductive glass powder 342 is through pressurized compacting and flow and be filled in gap between electrode pressure cap 344 and the electrode jack 32 and the gap between electrode plug 340 and the electrode jack 32; Utilize pressure welding, thereby the electrode jack 32 with electrode plug 340, conductive glass powder 342, electrode pressure cap 344 and ceramic measuring tube 30 in two electrode jacks 32 at ceramic measuring tube 30 two ends under high pressure conditions welds together, and makes the high-intensity electrode member 34 of high-compactness.
The 3rd embodiment:
See also Fig. 8 and Fig. 9, wherein, Fig. 8 has shown that electromagnet flow meter sensor of the present utility model cuts open figure along cutting radially in the 3rd embodiment; Fig. 9 cuts open figure for Fig. 8 cuts along C-C did.
In conjunction with Fig. 8 and Fig. 9, described electromagnet flow meter sensor comprises: flowing has the ceramic measuring tube 40 of detected fluid; Be positioned at two ends of ceramic measuring tube 40, the flange of conduct sealing usefulness; Subtend is configured in ceramic measuring tube 40 along the opposite end of caliber, evagination is the boss shape in described ceramic measuring tube pair of electrodes jack 42; Cooperate the electrode member 44 that is assembled on the ceramic measuring tube 40 with electrode jack 42.Electrode jack 42 comprises the first jack section 420 that points to ceramic measuring tube 40 internal faces and links to each other, points to the second jack section 422 of ceramic measuring tube 40 outside wall surface with the first jack section 420 that electrode member 44 comprises electrode plug 440, the electrode pressure cap 444 in the second jack section 422 of electrode jack 42 and the conductive glass powder 442 between electrode plug 440 and electrode pressure cap 444 in the first jack section 420 of electrode jack 42.
Especially, compare with first embodiment, in the 3rd embodiment, electrode member 44 also comprises the second electrode section, 422 opening parts that are positioned at electrode jack 42, the position limiting structure that is used to avoid electrode pressure cap 444 disengaging electrode jacks 42.Compare with second embodiment, in the 3rd embodiment, described position limiting structure comprises the limiting section 47 that is positioned at electrode jack 42 internal faces, utilizes limiting section 47, can carry out spacing to electrode pressure cap 444.
Figure 10 a and Figure 10 b have shown limiting section 47 among Fig. 8 and Fig. 9 and electrode jack 42 structural representation in one embodiment that cooperates with it respectively.In conjunction with Figure 10 a and Figure 10 b, limiting section 47 is located on the internal face of electrode jack 42, particularly, limiting section 47 be two spacing block sets (in the following description, spacing block set is indicated with 47), preferably, described two spacing block sets 47 have certain rotation gradient and are symmetrical arranged, and leaving certain gaps uncovered by the economic plan between two described spacing block sets 47.Correspondingly, electrode pressure cap 444 has also been done the certain structure improvement, be specially: offer the chute 445 corresponding with spacing block set 47 in the outside wall surface of electrode pressure cap 444, wherein, the width of chute 445 is more than or equal to the width of spacing block set 47, and the degree of depth of chute 445 is more than or equal to the protrusion height of spacing block set 47; Offering with 444 rotating shafts of electrode pressure cap on the outside wall surface in the stage casing of electrode pressure cap 444 is the annular slot 447 at center, wherein, the degree of depth of annular slot 447 more than or equal to spacing block set 47 protrusion height; Preferably, on annular slot 447, offer two screens portions 449 of certain rotation gradient.When using, at first, electrode plug 440 and conductive glass powder 442 inserted electrode jack 42 in regular turn after, the chute 445 of electrode pressure cap 444 is aimed at the spacing block set 47 of electrode jack 42 and radially inwardly pushing along ceramic measuring tube 40; Then, push certain distance to the annular slot 447 of electrode pressure cap 444 position corresponding to the spacing block set 47 of electrode jack 42, electrode pressure cap 444 is rotated along the rotation gradient of screens portion 449 (intuitively it seems, it is exactly the annular slot 447 that spacing block set 47 is positioned at screens with a slope portion 449, unidirectional spacing in order to realize, annular slot 447 should leave the gap, with guarantee to make electrode pressure cap 444 to electrode plug 440 do compress mobile), be clasped thereby make electrode pressure cap 444 constitute with electrode jack 32, realization is spacing to electrode pressure cap 344.
What need special instruction is, in the foregoing description, the described position limiting structure that provides is not as limit, constitute firm being clasped as long as can guarantee electrode pressure cap and electrode jack, position limiting structure still can be done other variation, for example: in a certain embodiment, described electrode pressure cap can design the combination of the chute and the annular slot of multisection type; In another embodiment, the electrode pressure cap also can not design annular slot, but only design the screens portion 449 of rotating the gradient at the end of electrode pressure cap 444, when using, be directly entire electrode pressure cap 444 to be pressed in the electrode jack 42, utilize the screens portion 449 of electrode pressure cap 444 ends and 47 formations of the spacing block set in the electrode jack 42 to be clasped; Do not give unnecessary details one by one at this.
Similar with second embodiment, in the 3rd embodiment, since especially provide have position-limiting action position limiting structure (in the present embodiment, described position limiting structure comprise having be positioned at electrode jack 42 outside wall surface, for example be chute 445, annular slot 447 and the screens portion 449 of the limiting section 47 of spacing block set and design on electrode pressure cap 444), thereby make two electrode jacks 42 in making electrode member 44 to carry out simultaneously.Like this, only need once assemble two electrodes, heating simultaneously again, pressure welding simultaneously can be finished the making of electrode member 44, has simplified production technology and cycle.
The 4th embodiment:
See also Figure 11 and Figure 12, wherein, Figure 11 has shown that electromagnet flow meter sensor of the present utility model cuts open figure along cutting radially in the 4th embodiment; Figure 12 cuts open figure for Figure 11 cuts along D-D did.
In conjunction with Figure 11 and Figure 12, described electromagnet flow meter sensor comprises: flowing has the ceramic measuring tube 50 of detected fluid, be positioned at two ends of ceramic measuring tube 50, the flange of conduct sealing usefulness, subtend is configured in ceramic measuring tube 50 along the opposite end of caliber, evagination is the boss shape in described ceramic measuring tube pair of electrodes jack 52; Cooperate the electrode member 54 that is assembled on the ceramic measuring tube 50 with electrode jack 52.
Especially, compare with second embodiment, in the 4th embodiment, electrode member 54 has been cancelled traditional electrode plug, only comprises that being arranged in electrode jack 52 closes on the conductive glass powder 542 of described ceramic measuring tube 50 internal faces and be arranged in the electrode pressure cap 544 that electrode jack 52 closes on ceramic measuring tube 50 outside wall surface.
In the 4th embodiment, the process of making electrode member 54 in electrode jack 52 comprises: at first, provide ceramic measuring tube 50, have a ceramic leg 58 (as shown in figure 13) in ceramic measuring tube 50.Ceramic leg 58 is a hollow structure, and its two ends are connected with two electrode jacks 52 at ceramic measuring tube 50 two ends respectively, and wherein electrode jack 52 gos deep into ceramic leg 58 parts; In ceramic leg 58, be packed into conductive glass powder 542, in electrode jack 52, insert the electrode pressure cap 544 that presses on conductive glass powder 542, and on electrode jack 52, assemble the gland 56 that plays position-limiting action; The ceramic measuring tube 50 that is filled with conductive glass powder 542 inserted carries out heat treated in the heating furnace, be heated to conductive glass powder 542 softening temperature in addition above after, make that conductive glass powder 542 is softening; Ceramic measuring tube 50 is taken out in heating furnace and pressure welding, thereby the conductive glass powder 542 in two electrode jacks 52 at ceramic measuring tube 50 two ends, electrode pressure cap 544 are welded together with the electrode jack 52 and the ceramic leg 58 of ceramic measuring tube 50; Finish after the pressure welding earlier with hyperacoustic method with ceramic leg 58 smash to its residual fraction dimpling in ceramic measuring tube 50 internal faces, with skive that the protuberance office polishing of ceramic leg 58 is extremely smooth until flushing with ceramic measuring tube 50 internal faces again.
Similar with second embodiment, also provide position limiting structure among the 4th embodiment, it comprises: be positioned at electrode jack 52 outside wall surface, for example for the limiting section 57 of spacing block set and have the screens portion that cooperates with limiting section 57 and be fastened on gland 56 on electrode jack 52 terminations, thereby make that making electrode member 54 in two electrode jacks 52 can carry out simultaneously.Like this, only need once assemble two electrodes, heating simultaneously again, pressure welding simultaneously can be finished the making of electrode member 54, has simplified production technology and cycle.
In the 4th embodiment, can realize that the electrode member that is made of conductive glass powder 542 and electrode pressure cap 544 54 and ceramic electrode jack 52 on every side combine closely seamless, before having avoided medium to infiltrate in several schemes the slit of electrode plug and electrode jack be difficult to cleaning, so can be used to have the occasion of hygienic requirements.
In addition, what need special instruction is, in the 4th embodiment, the ceramic leg that provides 58 for two ends respectively with two hollow structures that electrode jack 52 is connected at ceramic measuring tube 50 two ends, but not as limit, described ceramic leg still can have other variation example, for example in the ceramic leg 59 that provides as shown in figure 14, the two ends of ceramic leg 59 are blind hole structure, the hole end face of described each blind hole is to communicate with electrode jack 52, the bottom surface, hole of described each blind hole is the internal face (can for the filling position of conductive glass powder 542 will protrude from the internal face of ceramic measuring tube 50) of convex for ceramic measuring tube 50, so, follow-up smash ceramic leg 59 after, can expose conductive glass powder 542, and behind sanding and polishing, make conductive glass powder 542 flush again with ceramic measuring tube 50 internal faces, as electrode member 54.
Have, also it should be noted that, the position limiting structure among the 4th embodiment is not limited in top description, and it still can do other variations, for example can be with reference to the description among the 3rd embodiment, and perhaps carrying out of other do not repeat them here.
The foregoing description just lists expressivity principle of the present utility model and effect is described, but not is used to limit the utility model.Any personnel that are familiar with this technology all can make amendment to the foregoing description under spirit of the present utility model and scope.Therefore, rights protection scope of the present utility model should be listed as claims.
Claims (10)
1. the electrode structure of an electromagnet flow meter sensor, described electromagnet flow meter sensor includes ceramic measuring tube, and described electrode structure comprises: subtend is configured in the pair of electrodes jack and the corresponding pair of electrodes member that is disposed in the described electrode jack of described ceramic measuring tube opposite end; It is characterized in that described electrode jack is that evagination is the boss shape in described ceramic measuring tube.
2. electrode structure according to claim 1, it is characterized in that, the counter bore structure that described electrode jack contracts and extends out in being, comprise the first jack section of the internal face that points to described ceramic measuring tube and link to each other, point to the second jack section of the outside wall surface of described ceramic measuring tube with the described first jack section, the aperture of the described second jack section is greater than the aperture of the described first jack section;
Described electrode member comprises electrode plug, the electrode pressure cap in the second jack section of described electrode jack and the conductive glass powder between described electrode plug and described electrode pressure cap in the first jack section of described electrode jack.
3. electrode structure according to claim 2 is characterized in that, the first jack section of described electrode jack and the joint face of the second jack section are plane or circular conical surface.
4. electrode structure according to claim 1, it is characterized in that described electrode member comprises that being arranged in described electrode jack closes on the conductive glass powder of described ceramic measuring tube internal face and be arranged in the electrode pressure cap that described electrode jack closes on described ceramic measuring tube outside wall surface.
5. according to claim 2,3 or 4 described electrode structures, it is characterized in that, also comprise the opening part position limiting structure that is positioned at described electrode jack, described position limiting structure is unidirectional spacing, be used to avoid described electrode pressure cap to break away from described electrode jack, but allow the electrode pressure cap is compressed to described ceramic measuring tube internal face.
6. electrode structure according to claim 5 is characterized in that, described position limiting structure comprises the limiting section that is positioned at described electrode jack outside wall surface and is fastened on the described electrode jack termination, has a gland of the screens portion that cooperates with described limiting section.
7. electrode structure according to claim 6 is characterized in that, described limiting section is a spacing block set.
8. electrode structure according to claim 5 is characterized in that, described position limiting structure comprises limiting section that is positioned at described electrode jack internal face and the electrode pressure cap that cooperates with described limiting section.
9. electrode structure according to claim 8 is characterized in that, described limiting section is a spacing block set.
10. electrode structure according to claim 8 is characterized in that, described electrode pressure cap also comprises: be located at the outside wall surface of described electrode pressure cap, the chute corresponding with described spacing block set; Be located at the outside wall surface of described electrode pressure cap, be the annular slot at center with the rotating shaft of described electrode pressure cap; And the screens portion that on described annular slot, has certain rotation gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200624011U CN201974196U (en) | 2011-03-10 | 2011-03-10 | Electrode structure of electromagnetic flowmeter sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200624011U CN201974196U (en) | 2011-03-10 | 2011-03-10 | Electrode structure of electromagnetic flowmeter sensor |
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| CN201974196U true CN201974196U (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200624011U Expired - Lifetime CN201974196U (en) | 2011-03-10 | 2011-03-10 | Electrode structure of electromagnetic flowmeter sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931991A (en) * | 2017-12-15 | 2019-06-25 | 阿自倍尔株式会社 | The potentiometric detection electrode of electromagnetic flowmeter |
| CN110044428A (en) * | 2019-03-20 | 2019-07-23 | 中国计量大学上虞高等研究院有限公司 | The optimization method of inserted electromagnet flow meter probe structure and arrangement |
-
2011
- 2011-03-10 CN CN2011200624011U patent/CN201974196U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931991A (en) * | 2017-12-15 | 2019-06-25 | 阿自倍尔株式会社 | The potentiometric detection electrode of electromagnetic flowmeter |
| CN110044428A (en) * | 2019-03-20 | 2019-07-23 | 中国计量大学上虞高等研究院有限公司 | The optimization method of inserted electromagnet flow meter probe structure and arrangement |
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