CN205262544U - Tuning fork level meter - Google Patents
Tuning fork level meter Download PDFInfo
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- CN205262544U CN205262544U CN201520939304.4U CN201520939304U CN205262544U CN 205262544 U CN205262544 U CN 205262544U CN 201520939304 U CN201520939304 U CN 201520939304U CN 205262544 U CN205262544 U CN 205262544U
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- protective sleeve
- tuning fork
- bar portion
- position measuring
- fork material
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Abstract
The utility model relates to a tuning fork level meter, it includes: the sensing part, the sensing part includes: stretch into the pole portion that treats among the test container, the end of pole portion is sealed by the spacer, the vibrating elements of spacer is fixed in from the outside, and the inboard piezoelectric element who is fixed in the spacer of follow, the circuit part, the circuit part electricity is connected in piezoelectric element to drive piezoelectric element is and obtain to come from piezoelectric element's signal, and wherein, tuning fork level meter still includes the protective sheath that is connected to the partial pole portion of sensing, and the protective sheath is turned up the soil around the vibrating elements with the vibrating elements interval. This tuning fork level meter receives the protection between the transportation / service time, has avoided because the collision causes spacer and piezoelectric element's deformation, and then has avoided the piezoelectric element damage.
Description
Technical field
The utility model relates to a kind of tuning fork material-position measuring meter.
Background technology
This section is only for introducing some background knowledges relevant to the utility model, and these knowledge may not be prior aries.
Tuning fork material-position measuring meter vibrates tuning fork by the piezoelectric element being arranged on tuning fork partition under certain resonant frequency. WhenWhen the vibrating elements of tuning fork liquid level gauge contacts with measured medium, the frequency of tuning fork and amplitude will change, this of tuning fork liquid level gaugeA little variation detected by circuit, thereby knows whether vibrating elements contacts with measured medium.
Due in transport, installation and use procedure, vibrating elements may be impacted, and then damages inner piezoelectricity unitPart, therefore, need to protect tuning fork material-position measuring meter.
Utility model content
An object of the present utility model is to provide a kind of tuning fork thing that can be protected between transport and/or operating periodPosition meter.
The utility model provides a kind of tuning fork material-position measuring meter, and it comprises: sensing part, described detecting part divides and comprises: stretch intoTo the bar portion in container to be detected, the end of described bar portion is sealed by partition; Be fixed on the vibrating elements of described partition from outside;And be fixed on the piezoelectric element of described partition from inner side; Circuit part, described circuit part is electrically connected on described piezoelectric element,Thereby drive described piezoelectric element and obtain the signal from described piezoelectric element, wherein, described tuning fork material-position measuring meter also comprisesThe protective sleeve that is connected to described bar portion, described protective sleeve and described vibrating elements are at interval around described vibrating elements.
Alternatively, described bar portion comprises the terminal part of bar portion main body and contiguous described partition, and the external diameter of described terminal part is littleIn the external diameter that equals described bar portion main body.
Alternatively, described protective sleeve is connected to described terminal part, and the external diameter of described protective sleeve is less than the described bar master of portionThe external diameter of body.
Alternatively, described protective sleeve is connected to described bar portion main body.
Alternatively, the internal diameter of described protective sleeve is greater than the external diameter of described bar portion main body.
Alternatively, described protective sleeve is hollow barrel-type.
Alternatively, described protective sleeve is made up of nonmetal, and is connected to described bar portion by interference fit.
Alternatively, be provided with radially multiple at contrary one end place, one end with being connected to described bar portion of described protective sleeveThe reinforcement gusset extending.
Alternatively, on described protective sleeve, be provided with multiple pass through openings.
Alternatively, on described protective sleeve, be provided with and facilitate hand-held hand held structures.
Alternatively, described hand held structures is hole, protuberance, recess or groove.
Alternatively, described protective sleeve is made of metal, and is provided with multiple pass through openings on described protective sleeve.
Alternatively, described protective sleeve is connected to described bar portion by welding in non-removable mode.
Alternatively, described protective sleeve is connected to described bar portion by spot welding.
Alternatively, described protective sleeve is the tubular of one end sealing, has central opening in blind end, and described bar portion is inserted intoIn described central opening, and described protective sleeve is soldered to described bar portion along described central opening.
Alternatively, described protective sleeve is connected to described bar by the mode being threaded along the axial direction of described bar portionPortion.
Alternatively, described protective sleeve is fixed by screw, rivet or the pin vertical with the axial direction of described bar portionBe connected to described bar portion.
Alternatively, on described bar portion and described protective sleeve, be respectively arranged with the location structure of shape complementarity, described protectionCover is fixed on described bar portion by clip.
Alternatively, described bar portion and described protective sleeve are provided with flange, the flange of described bar portion and described protective sleeveBetween flange, be provided with sealing ring, and by joint, the flange of described bar portion and the flange of described protective sleeve be fixed on to oneRise, described joint has by hinged two semi-circular half portions, and described two semi-circular half portions are relative with hinge oneSide has bolt hole, circularizes, to hold the flange of described bar portion, the flange of described protective sleeve thereby can be boltedWith described sealing ring.
The utility model has the advantage of, a kind of tuning fork level being protected between transport and/or operating period is providedMeter, has avoided causing due to collision the distortion of partition and piezoelectric element, and then has avoided piezoelectric element damage. Thereby improve soundThe obdurability of fork level meter, makes tuning fork material-position measuring meter can be applied to the measurement occasion of frequent generation mechanical collision, and can keep awayExempt from unnecessary economic loss.
Brief description of the drawings
By the description referring to accompanying drawing, the feature and advantage of one or several embodiment of the present utility model will becomeEasier to understand, wherein:
Fig. 1 be do not install protective sleeve according to the partial sectional view of tuning fork material-position measuring meter of the present utility model;
Fig. 2 be provided with a kind of protective sleeve according to the partial sectional view of tuning fork material-position measuring meter of the present utility model;
Fig. 3 is the cutaway view of the modification of the protective sleeve in Fig. 2;
Fig. 4 and Fig. 5 are the end-views of the modification of protective sleeve;
Fig. 6 is the partial sectional view that the tuning fork material-position measuring meter of another kind of protective sleeve is installed;
Fig. 7 is the partial perspective view of tuning fork material-position measuring meter shown in Fig. 6;
Fig. 8-12nd, the partial sectional view of tuning fork material-position measuring meter, shows the difference enforcement side that connects protective sleeve by weldingFormula;
Figure 13-15th, the partial sectional view of tuning fork material-position measuring meter, shows and is threaded connection and connects the difference of protective sleeveEmbodiment;
Figure 16-18th, the partial sectional view of tuning fork material-position measuring meter, shows respectively by screw, rivet and pin and is fixed on barThe protective sleeve of portion;
Figure 19 is the partial sectional view that the tuning fork material-position measuring meter of protective sleeve is installed in another way; And
Figure 20 is the partial sectional view that the tuning fork material-position measuring meter of protective sleeve is installed in another way.
Detailed description of the invention
Description related to the preferred embodiment is only exemplary below, and be never to the utility model and application thereof orThe restriction of usage. In description, used " on ", the word of the expression direction such as D score, " top ", " bottom " describes between partsRelative position relation, using these words is clearly to describe the utility model for the direction based on shown in accompanying drawing, and structure notPaired restriction of the present utility model. It will be appreciated by those skilled in the art that in the time that tuning fork material-position measuring meter is installed with different directions instituteThe parts of describing may have different relative position relations.
Fig. 1 shows according to the tuning fork material-position measuring meter 1 installing before protective sleeve of the present utility model, itself and prior artTuning fork material-position measuring meter is roughly the same. This tuning fork material-position measuring meter 1 comprises sensing part 10 and circuit part 20 generally, and sensing part 10 canExtend in container with the thing position in Sensing container, and circuit part 20 is stayed outside container. Sensing part 10 comprises and is roughly cylinderThe bar portion 12 of shape, the length of bar portion 12 can design as required. The diameter of the terminal part 121 of bar portion 12 is slightly less than bar portion main body122 diameter, thus between portion 121 and bar portion main body 122, form stage portion 13 endways. Terminal part 121 is sealed by partition 14,Thereby protection inner member does not touch sensed material. Sensing part 10 also comprises that be fixed on a pair of of partition 14 shakes from outsideMove element 16 and be fixed on the piezoelectric element 18 of partition 14 from inner side, piezoelectric element 18 is for example PZT wafer. Circuit part 20Be connected in piezoelectric element 18 by the circuit (not shown) in bar portion 12, thereby can drive piezoelectric element 18 vibrate and obtainFrom the signal of piezoelectric element 18.
In example described below, bar portion comprises bar portion main body 122 and the smaller terminal part 121 of diameter. But, bar portion12 also may have consistent diameter, that is, the size of terminal part 121 equals the size of bar portion main body 122. In this case,Can simply " terminal part " below mentioned and " bar portion main body " be all interpreted as to " bar portion ", and not distinguish.
This tuning fork material-position measuring meter 1 can, for detection of the thing position of different medium, comprise: liquid, as have explosive and non-quick-friedThe liquid of fried property danger, corrosive liquids (acid, alkali), high viscosity liquid etc.; And the solid of the free-pouring intermediate density of energyPowder; Or particle. For example, while using tuning fork material-position measuring meter 1 in the process to container filling material, the vibration unit of tuning fork material-position measuring meter 1Part 16 is arranged on object height place, by circuit part 20, piezoelectric element 18 is applied to alternating electric field, on vibrating elements 16, producesRaw mechanical force, makes vibrating elements 16 with certain resonant frequency vibration. When the carrying out along with filling, the material in container reaches vibrationWhen the At The Height of element 16 and submergence vibrating elements 16, the frequency of vibrating elements 16 and amplitude will change, and these change by electricityRoad part 20 detects, and processes and convert it to a switching signal. Should be appreciated that this tuning fork material-position measuring meter 1 is all rightBe arranged on the bottom of container, whether emptying with the material in inspection instrument.
At present, on market, common tuning fork material-position measuring meter is to be the design of quant type mostly, and vibrating elements holds as cantilever beam very muchBe vulnerable to impact and produce destruction, now oar shape vibrating elements is easy to make partition stretch and be out of shape, and binding was not therein bothThe piezoelectric element of thin and fragile is also subject to stretching and rupture failure thereupon. In some applications, in gasoline, diesel pouring process, liquidPosition instrument is collided unavoidably and destroys, and how in this type of application, to ensure that it is a measurement that instrument is worked reliably alwaysA difficult problem. In addition, in transport and installation process, user also likely drops tuning fork because of carelessness or breaks bad tuning fork vibration unitPart, these all may damage inner piezoelectric element, cause tuning fork material-position measuring meter to lose efficacy. And user is only installing thing positionCount and bring into use after could find the fault of level meter, thereby necessary replacing level meter, this also increased cost and toUser brings inconvenience. Therefore in such situation, be, very necessary with the tuning fork meter of protection.
For this reason, tuning fork material-position measuring meter 1 is designed to protective sleeve 30. Protective sleeve 30 can be made up of nonmetal or metal,When by nonmetal making, it is dismountable that protective sleeve 30 is made, thus only at the In transit of tuning fork material-position measuring meter 1 to vibrating unitPart 16 is protected, and in the time that level meter 1 is installed, protective sleeve 30 is removed; In the time being made of metal, protective sleeve 30 can be withNonmetal protective sleeve is equally dismountable, also may be fixedly attached on tuning fork material-position measuring meter 1, thereby in delivery period of level meter 1Between and between the operating period, all vibrating elements 16 is protected.
Describe protective sleeve 30 and the some examples with the connected mode of level meter 1 main body thereof hereinafter with reference to accompanying drawing, useAlphabetical a-q (wherein do not use alphabetical l and o) refer to each example of protective sleeve 30.
Protective sleeve 30a shown in Fig. 2 is roughly hollow circle tube, with around vibrating elements 16. The internal diameter of protective sleeve 30a withThe external diameter interference fit of the terminal part 121 of bar portion 12, makes it possible to by the pressure that coordinates between protective sleeve 30a and terminal part 121Power and protective sleeve 30a is remained in bar portion 12. And, the inwall of protective sleeve 30a and the spaced apart certain distance of vibrating elements 16,, do not contact with vibrating elements 16. The external diameter of protective sleeve 30a can be less than or equal to the external diameter of bar portion main body 122, thus, and Ke YibaoThe overall dimensions of holding sensing part 10 does not expand, thereby does not need to expand for the vessel port of level meter 1 is installed.
Protective sleeve 30a can for example, be made up of nonmetal (plastics), and therefore, it is for protecting tuning fork material-position measuring meter 1 in the delivery periodBe not damaged. In the time that In transit bumps, shock will can not act directly on vibrating elements 16, thereby protection insidePiezoelectric element 18 can not break because of excessive deformation. Different from following embodiment, on the nonmetal protective sleeve 30a makingCan not be provided for discharging the pass through openings of medium.
Near the end of protective sleeve 30a, can be provided with the structure that facilitates user that protective sleeve 30a is taken off, Fig. 2 illustratesRelatively arrange two through hole 31a as example, user can pinch protective sleeve 30a at through hole 31a place and be taken off. ShouldWork as understanding, can adopt any other suitable Handheld Division, as protuberance, recess or groove.
Referring to Fig. 3, protective sleeve 30a can also not be simple cylindrical shape, radially prolongs but be provided with several in bottomThe gusset 32a stretching. Fig. 4 and Fig. 5 show respectively the end-view of the protective sleeve 30a that is provided with three and five gusset 32a. AbilityField technique personnel can understand, and the gusset 32a of other quantity also can be set. By gusset 32a is set, can improve by plasticsEtc. the intensity of the nonmetal protective sleeve 30a making, enable the shock loading that opposing is larger.
Although protective sleeve 30a is described as being engaged and being attached to bar portion 12 by interference, should be appreciated that protective sleeve30a also can be connected to bar portion 12 in other dismountable mode, for example, be threaded connection etc. In appropriate circumstances, withThe connected mode of the described metal protective sleeve in lower combination Fig. 6-20 also can be applied to nonmetal protective sleeve 30a.
Fig. 6-7 show another example 30b of protective sleeve. Protective sleeve 30b is made of metal, and transport, install andIn use procedure, be all fixed on the sensing part 10 of level meter 1. Protective sleeve 30b is also roughly hollow circle tube with first around vibrationPart 16. Protective sleeve 30b matches with the terminal part 121 of bar portion 12 at 33b place, auxiliary section, and by the top around auxiliary section 33bPortion edge carries out spot welding and is connected to terminal part 121 (solder joint is illustrated by w). Present inventor finds, by reasonably selectingSelect number of welds and position, can avoid the terminal part 121 of bar portion 12 to be out of shape, and then not affect the frequency spy of tuning fork material-position measuring meter 1Property. 30a is similar with protective sleeve, the inwall of protective sleeve 30b and the spaced apart certain distance of vibrating elements 16, that is, not with vibrating elements16 contacts. The external diameter of protective sleeve 30b can be less than or equal to the external diameter of bar portion main body 122, thus, can keep the whole of sensing part 10Body size does not expand, thereby does not need to expand for the vessel port of level meter 1 is installed.
As shown in Fig. 6-7, on protective sleeve 30b, be provided with multiple pass through openings 34b so that be communicated with inside and outside protective sleeve 30b.Pass through openings 34b is arranged in different axial locations and circumferential position place, in the axial direction, with the top of vibrating elements 16, inThe position of portion and bottom correspondence is provided with pass through openings 34b; And pass through openings 34b all has at each circumferential angle place pointCloth. Only for example, and do not represent actual quantity in the pass through openings shown in Fig. 6-20. The shape of these pass through openings 34Unrestricted, can be for example circle, ellipse, flute profile etc., it is dimensioned to and makes process medium (as thick liquid, powderEnd or solid) can pass pass through openings 34. Thus, in the time that protective sleeve 30b gos deep into process medium with sensing part 10, mistakeCheng Jiezhi can successfully enter and leave protective sleeve via the bottom-open mouth of multiple pass through openings 34b and protective sleeve 30b30b, and can not accumulate in the space between vibrating elements 16 and protective sleeve 30b, thereby prevent false alarm.
Metal protective sleeve 30b processed is mainly used in easily occurring the job applications of shock, and for example oil is filling. In use,If clashed into, rammer is by first impact protector cover 30b, and protective sleeve 30b deforms replacement vibrating elements 16 resistImpact. Owing to having gap between protective sleeve 30b and vibrating elements 16, so even the situation that protective sleeve 30b is deformingUnder be also not easy and vibrating elements collision, thus, dividing plate 14 and piezoelectric element 18 can not break because of excessive deformation, thereby riseTo the effect of protection sensing part 10. With enough firmly opposing impacts of level meter 1 of this protective sleeve 30b.
Use with another advantage of the tuning fork material-position measuring meter 1 of protective sleeve 30b and be, due to pass through openings 34b'sProtective sleeve 30b changes and plays damping action for thing position in container, thus in the time that outside thing position changes rapidly (for example, owing to stirringMix and while making liquid level unstable), it is relatively mild that the thing position in protective sleeve 30b changes, vibrating elements 16 can not enter continually/fromOpen procedure medium, so can improve sensing precision, reduces false alarm.
Fig. 8 shows protective sleeve 30c, and weight is no longer carried out in its aspect similar and identical with the protective sleeve 30b shown in Fig. 6Multiple description. below mention rear embodiment to formerly describe embodiment " similar " time, those skilled in the art canUnderstand, aspect not describing in detail in rear embodiment, as material, size, structure all identical with embodiment formerly (whenSo, likely simply change as required), and can obtain and beneficial effect that formerly embodiment is identical. Fig. 8The difference of protective sleeve 30b shown in shown protective sleeve 30c and Fig. 6 is only position and the welding manner of welding, as shown in Figure 8,Substantial middle part at the auxiliary section 33c matching with terminal part 121 of protective sleeve 30c is welded, and by protective sleeve30b burn-through (is shown in weld seam w) so that protective sleeve 30b is fixed on to terminal part 121.
Fig. 9 shows protective sleeve 30d, and weight is no longer carried out in its aspect similar and identical with the protective sleeve 30b shown in Fig. 6Multiple description. Difference is, the length in terminal part 121 to the first embodiments of tuning fork material-position measuring meter 1, correspondingly, protective sleeve 30d'sThe auxiliary section 33d matching with terminal part 121 is also relatively long, and for example, the length of terminal part 121 and auxiliary section 33d is greater than end1/2 of the diameter of end 121. 30b is identical with protective sleeve, weld around the top of auxiliary section 33d, thereby by protective sleeve30d is connected to terminal part 121 (weld seam is illustrated by w). By increasing the length of auxiliary section 33c, make weld seam w more away from partition14 and piezoelectric element (not shown in Fig. 9), thus, the heat can further reduce to weld time is to partition 14 and piezoelectric element18 impacts that cause, keep the frequency characteristic of level meter 1 constant.
Figure 10 shows protective sleeve 30e, and no longer carry out its aspect similar and identical with the protective sleeve 30d shown in Fig. 9Be repeated in this description. Difference is, protective sleeve 30e is not engaged to the less terminal part 121 of diameter of bar portion 12, but closely joinsBe bonded to bar portion main body 122. The internal diameter of the auxiliary section 33e of protective sleeve 30e matches with the external diameter of bar portion main body 122, by around joiningClosing the top of the 33e of portion welds and is connected to bar portion main body 122 (weld seam is illustrated by w). This weld seam w can be than Fig. 9 instituteThe weld seam w showing is more away from partition 14 and piezoelectric element (not shown in Figure 10), thus, can further reduce to weld timeThe impact that heat causes partition 14 and piezoelectric element 18. Because the thickness of metal protective sleeve 30e is less, so only omitMicro-overall dimensions that increases sensing part 10.
Figure 11 shows protective sleeve 30f, and no longer carry out its aspect similar and identical with the protective sleeve 30e shown in Figure 10Be repeated in this description. Difference is, protective sleeve 30f is not closely engaged to bar portion main body 122. Protective sleeve 30f is roughly top (phaseFor the direction shown in figure) cylindrical shape of sealing, and be provided with medium pore 35f in its center of top, medium pore 35fInternal diameter match with the external diameter of bar portion main body 122, bar portion main body 122 is inserted in medium pore 35f. Carry out around medium pore 35fWelding, to be fixed to bar portion 12 by protective sleeve 30f. The internal diameter of protective sleeve 30f is obviously greater than the size of bar portion main body 122, therebyMake, compared with the protective sleeve 30e shown in Figure 10, to have increased the gap between protective sleeve 30f and vibrating elements 16. Thus, canFurther avoid in the time that protective sleeve 30f is subject to clashing into, the protective sleeve 30f after distortion touches the possibility of vibrating elements 16.
Figure 12 shows protective sleeve 30g, and no longer carry out its aspect similar and identical with the protective sleeve 30f shown in Figure 11Be repeated in this description. Difference is, protective sleeve 30g is not only fixed to bar portion main body 122. Protective sleeve 30g is also roughly top sealCylindrical shape, and be provided with medium pore 35g in its center of top. The terminal part 121 of the internal diameter of medium pore 35g and bar portion 12External diameter matches, and therefore, after bar portion 12 is inserted in medium pore 35g, the top surface of protective sleeve 30g is resisted against stage portion 13,In this case, on the top of medium pore 35g, between protective sleeve 30g and bar portion main body 122, weld, and in central authoritiesWeld, as shown in weld seam w between protective sleeve 30g and terminal part 121 bottom of hole 35g. Thus, can determine exactlyPosition protective sleeve 30g and more securely protective sleeve 30g is fixed on to bar portion 12.
Above Fig. 6-12 all show protective sleeve 30 and are soldered to the mode of bar portion 12, it will be appreciated by those skilled in the art thatUnder the instruction of these embodiments, those skilled in the art can carry out multiple remodeling, with by the protection of various sizes, shapeCover is soldered to the diverse location of bar portion 12. Welding manner can be spot welding, weld or all-round welding along circumferential multistage.
Figure 13 shows protective sleeve 30h, and no longer carry out its aspect similar and identical with the protective sleeve 30b shown in Fig. 6Be repeated in this description. Difference is, in bar portion main body 122, is provided with along the axial direction of bar portion away from the position of terminal part 121The external thread part 123 extending, the external diameter of external thread part 123 is greater than the external diameter of bar portion main body 122. At columnar protective sleeve 30hInside be provided with the internal thread part 36h that can engage with threaded portion 123 and be positioned at extending radially inwardly of internal thread part belowProtuberance 37h. The internal diameter of protuberance 37h is greater than the external diameter of bar portion main body 122, and is less than the external diameter of threaded portion 123. Can easily lead toCross protective sleeve 30h is screwed in bar portion main body 122 protective sleeve 30h is fixed on to bar portion main body 122, and as protuberance 37hWhile being resisted against the lower edge of external thread part 123, stop screwing, with accurate positioning protective sleeve 30h.
Figure 14 shows protective sleeve 30i, and no longer carry out its aspect similar and identical with the protective sleeve 30h shown in Figure 13Be repeated in this description. Difference is, is provided with external thread part 123, outer spiral shell in the position of the adjacent end portion 121 of bar portion main body 122The external diameter of line portion 123 is substantially equal to the external diameter of bar portion main body 122. In the protective sleeve 30i of general cylindrical shape, being provided with can be withThe internal thread part 36i that engage threaded portion 123, and protuberance is not set. Can be easily by protective sleeve 30i be screwed to bar portionIn main body 122, protective sleeve 30i is fixed on to bar portion main body 122, in the time that internal thread part 36i coordinates completely with external thread part 123,Thereby stop screwing accurately positioning protective sleeve 30i.
Figure 15 shows protective sleeve 30j, and no longer carry out its aspect similar and identical with the protective sleeve 30i shown in Figure 14Be repeated in this description. Difference is, on the terminal part 121 of bar portion 12, is provided with external thread part 123, and the external diameter of external thread part 123 is littleIn the external diameter of bar portion main body 122, and form circumferential recess 124 between external thread part 123 and bar portion main body 122. RoughlyIn columnar protective sleeve 30j, be provided with the internal thread part 36j that can engage with threaded portion 123. Can be easily by protectingSheath 30j is screwed on terminal part 121 and protective sleeve 30j is fixed on to bar portion 12, when the top of protective sleeve 30j is against the master of bar portionWhen body 122, thereby stop screwing accurately positioning protective sleeve 30j. By groove 124 is set, can ensure protective sleeve in the time of assembling30j and bar portion main body 122 are close to. The external diameter of protective sleeve 30j is also less than the external diameter of bar portion main body 122, therefore at this embodimentIn, compared with the situation of unassembled protective sleeve 30j, be equipped with the overall dimensions of the sensing part 10 of the level meter 1 of protective sleeve 30jDo not increase.
Figure 16 shows protective sleeve 30k, and no longer carry out its aspect similar and identical with the protective sleeve 30e shown in Figure 10Be repeated in this description. Difference is, protective sleeve 30k is not connected to bar portion main body 122 by welding, but by vertical with bar portionScrew 41 be fixed on bar portion main body 122.
Figure 17 shows protective sleeve 30m, and no longer carry out its aspect similar and identical with the protective sleeve 30k shown in Figure 16Be repeated in this description. Difference is, protective sleeve 30m is fixed on bar portion main body 122 by the rivet vertical with bar portion 42.
Figure 18 shows protective sleeve 30n, and no longer carry out its aspect similar and identical with the protective sleeve 30k shown in Figure 16Be repeated in this description. Difference is, protective sleeve 30n is fixed on bar portion main body 122 by the pin vertical with bar portion 43. Pin 43 roughlyBe frustoconical.
Figure 19 shows protective sleeve 30p, and no longer carry out its aspect similar and identical with the protective sleeve 30e shown in Figure 10Be repeated in this description. Difference is, protective sleeve 30p is not connected to bar portion main body 122 by welding. Connecing of bar portion main body 122The position of proximal end portion 121 is provided with the protuberance 126 extending radially outwardly, and joining with bar portion main body 122 at protective sleeve 30eThe corresponding position of the auxiliary section 33p closing is provided with recess 38p. By the protuberance 126 of shape complementarity and coordinating of recess 38p,The accurately relative position of positioning protective sleeve 30p and bar portion 12. Then use the outer most surrounding protection of clip 44 at recess 38pCover 30p also passes through screw 45 fixing hoops 44. Thus, also can by protective sleeve 30p accurately, be firmly-fixed to bar portion 12. ShouldWork as understanding, also can in bar portion main body 122, recess be set, and the protuberance of shape complementarity or other are set on protective sleeve 30pThe structure of shape complementarity, to provide positioning action.
Figure 20 shows protective sleeve 30q, and no longer carry out its aspect similar and identical with the protective sleeve 30g shown in Figure 12Be repeated in this description. Difference is, this protective sleeve 30q is roughly cylindrical, and has flange 39q at top periphery, flange 39q'sThickness is along the direction convergent away from cylindrical-shaped main body. The terminal part 121 of bar portion 12 is also with flange 127, the thickness edge of flange 127Away from the direction convergent of terminal part 121. The bottom surface of flange 127 is relative with the end face of flange 39q across sealing ring 128. Then makeFlange 127 and flange 39q are fixed together with joint 46, joint 46 has two semi-circular half portions that connected by hinge 48,This two half-unit has bolt hole 47 in a side relative with hinge, circularizes (its structure class thereby can be boltedLike handcuffss), to hold flange 39q, 127 and sealing ring 128. Joint 46 has corresponding with the convergent shape of flange 127 and 39qInterior shape, thus, can protective sleeve 30q and bar portion 12 be linked together hermetically by joint 46.
In above each example, bar portion 12 and protective sleeve 30 are all cylindrical, should be appreciated that bar portion 12 and protective sleeve 30 alsoCan there is circular shape of cross section in addition.
Although described embodiment of the present utility model in detail at this, should be appreciated that the utility model does not limit toIn the detailed description of the invention of describing in detail and illustrating here, can be by the situation that not departing from essence of the present utility model and scopeThose skilled in the art realizes other modification and variant. All these modification and variant all fall into scope of the present utility modelIn. And all members described here can be replaced by the member being equal in other technologies, real in conjunction with one of themThe described structure of the mode of executing and principle can be applicable to other embodiment.
Claims (19)
1. a tuning fork material-position measuring meter, is characterized in that comprising:
Sensing part, described detecting part divides and comprises: extend into the bar portion in container to be detected, the end of described bar portion is sealed by partitionClose; Be fixed on the vibrating elements of described partition from outside; And be fixed on the piezoelectric element of described partition from inner side;
Circuit part, described circuit part is electrically connected on described piezoelectric element, thereby drives described piezoelectric element and obtainFrom the signal of described piezoelectric element,
Wherein, described tuning fork material-position measuring meter also comprises the protective sleeve, described protective sleeve and the described vibrating elements that are connected to described bar portionAt interval around described vibrating elements.
2. tuning fork material-position measuring meter according to claim 1, is characterized in that, described bar portion comprise bar portion main body and contiguous described inThe terminal part of partition, the external diameter of described terminal part is less than or equal to the external diameter of described bar portion main body.
3. tuning fork material-position measuring meter according to claim 2, is characterized in that, described protective sleeve is connected to described terminal part, andAnd the external diameter of described protective sleeve is less than the external diameter of described bar portion main body.
4. tuning fork material-position measuring meter according to claim 2, is characterized in that, described protective sleeve is connected to described bar portion main body.
5. tuning fork material-position measuring meter according to claim 2, is characterized in that, the internal diameter of described protective sleeve is greater than the described bar master of portionThe external diameter of body.
6. tuning fork material-position measuring meter according to claim 1, is characterized in that, described protective sleeve is hollow barrel-type.
7. according to the tuning fork material-position measuring meter described in any one in claim 1 to 6, it is characterized in that, described protective sleeve is by nonmetalMake, and be connected to described bar portion by interference fit.
8. tuning fork material-position measuring meter according to claim 7, is characterized in that, described protective sleeve be connected to described bar portionContrary one end place, one end be provided with multiple radially extend reinforcement gussets.
9. tuning fork material-position measuring meter according to claim 7, is characterized in that, is provided with multiple perforations and opens on described protective sleeveMouthful.
10. tuning fork material-position measuring meter according to claim 7, is characterized in that, on described protective sleeve, be provided with facilitate hand-heldHand held structures.
11. tuning fork material-position measuring meters according to claim 10, is characterized in that, described hand held structures be hole, protuberance, recess orGroove.
12. according to the tuning fork material-position measuring meter described in any one in claim 1 to 6, it is characterized in that, described protective sleeve is by metalMake, on described protective sleeve, be provided with multiple pass through openings.
13. tuning fork material-position measuring meters according to claim 12, is characterized in that, described protective sleeve by welding and with non-disconnectableThe mode of unloading is connected to described bar portion.
14. tuning fork material-position measuring meters according to claim 13, is characterized in that, described in described protective sleeve is connected to by spot weldingBar portion.
15. tuning fork material-position measuring meters according to claim 12, is characterized in that, described protective sleeve is the tubular of one end sealing,In blind end, have central opening, described bar portion is inserted in described central opening, and described protective sleeve is along described central authoritiesOpening is soldered to described bar portion.
16. tuning fork material-position measuring meters according to claim 12, is characterized in that, described protective sleeve is by the axle along described bar portionThe mode being threaded to direction is connected to described bar portion.
17. tuning fork material-position measuring meters according to claim 12, is characterized in that, described protective sleeve by with the axle of described bar portionBe fixedly attached to described bar portion to the vertical screw of direction, rivet or pin.
18. tuning fork material-position measuring meters according to claim 12, is characterized in that, difference on described bar portion and described protective sleeveBe provided with the location structure of shape complementarity, described protective sleeve is fixed on described bar portion by clip.
19. tuning fork material-position measuring meters according to claim 12, is characterized in that, described bar portion and described protective sleeve are provided withFlange, is provided with sealing ring between the flange of described bar portion and the flange of described protective sleeve, and by joint by described bar portionFlange and the flange of described protective sleeve be fixed together, described joint has by hinged two semi-circular half portions, instituteState two semi-circular half portions and there is bolt hole in a side relative with hinge, circularize thereby can be bolted, to holdReceive the flange of described bar portion, flange and the described sealing ring of described protective sleeve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520939304.4U CN205262544U (en) | 2015-11-23 | 2015-11-23 | Tuning fork level meter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520939304.4U CN205262544U (en) | 2015-11-23 | 2015-11-23 | Tuning fork level meter |
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| CN205262544U true CN205262544U (en) | 2016-05-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840303A (en) * | 2017-02-08 | 2017-06-13 | 江苏德大自动化设备有限公司 | Prevent level transducer, overflow electrostatic controller and the electrostatic system of electrostatic spark |
| CN106840309A (en) * | 2017-04-01 | 2017-06-13 | 伊玛精密电子（苏州）有限公司 | Intelligent miniature tuning fork type level meter |
| CN108955815A (en) * | 2018-09-07 | 2018-12-07 | 天长市瑞达仪表电缆材料厂 | A kind of food processing tuning fork liquidometer |
| CN109489771A (en) * | 2018-11-22 | 2019-03-19 | 北京航天计量测试技术研究所 | It is a kind of suitable for high temperature and pressure, the oscillatory type level switch of inflammable and explosive environment |
-
2015
- 2015-11-23 CN CN201520939304.4U patent/CN205262544U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840303A (en) * | 2017-02-08 | 2017-06-13 | 江苏德大自动化设备有限公司 | Prevent level transducer, overflow electrostatic controller and the electrostatic system of electrostatic spark |
| CN106840309A (en) * | 2017-04-01 | 2017-06-13 | 伊玛精密电子（苏州）有限公司 | Intelligent miniature tuning fork type level meter |
| WO2018176579A1 (en) * | 2017-04-01 | 2018-10-04 | 伊玛精密电子（苏州）有限公司 | Miniature intelligent tuning fork-type level gauge |
| CN108955815A (en) * | 2018-09-07 | 2018-12-07 | 天长市瑞达仪表电缆材料厂 | A kind of food processing tuning fork liquidometer |
| CN109489771A (en) * | 2018-11-22 | 2019-03-19 | 北京航天计量测试技术研究所 | It is a kind of suitable for high temperature and pressure, the oscillatory type level switch of inflammable and explosive environment |
| CN109489771B (en) * | 2018-11-22 | 2020-06-09 | 北京航天计量测试技术研究所 | Vibrating material level switch suitable for high-temperature high-pressure, inflammable and explosive environment |
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