CN205120210U - Floater formula level gauge that vernier shows - Google Patents

Abstract

The utility model relates to a floater formula level gauge that vernier shows, including the outer vernier of float chamber and the spherical floater of interior ferromagnetism, float chamber, scale, and vernier guide rail, wherein, the vernier includes the fixed and roll system in the frame of overlapping of magnet steel, frame and level, the roll system includes roll wheel, antifriction bearing and the axle of following the circumference surface and being equipped with radial groove, the magnet steel is located and is close to between float chamber and the frame and on being fixed in the frame float chamber one side off -plate, the magnetic pole of magnet steel is just right the floater, the vernier guide rail overlap in be located in the rectangular frame between magnet steel and the roll system, the magnetic coupling power that the roll system passes through between magnet steel and the floater realizes rolling the wheel on its groove position edge the vernier guide rail rolls from top to bottom. The utility model discloses the simple structure science, performance is reliable, the manufacturing is easy, with low costs, has compensatied prior art's defect, has effectively satisfied the demand in relevant field.

Description

The floating ball type liquid-level meter of vernier display

Technical field

The utility model relates to fluid level measuring device, particularly relates to the floating ball type liquid-level meter of a kind of vernier display.

Background technology

The existing liquid level instrument of indicating type on the spot has glass plate type, magnetic turnover panel (post) formula, float type, two-colour fluviograph etc.Glass plate type can only closely be estimated, and covers dust or by range estimation difficulty after medium pollution, to be withstand voltagely restricted.Magnetic turnover panel (post) formula structure relative complex and easily occur mess code, magnet steel in addition in ball float also also exists the problem of high temperature demagnetization, affect its Long-Time Service, such as: the magnetic floating ball lever meter of import, although high temperature resistant, use after 4 ~ 5 years, have to change ball float because of the magnet steel demagnetization in ball float.The media range that two-colour fluviograph is suitable for is narrow and be withstand voltagely also restricted.In addition, glass plate type leveler or two-colour fluviograph can not take insulation, cause energy consumption large.

As Chinese patent ZL93213461.0, its advantage is that structure is simple, and improve temperature usable range, the buoyancy of liquid to vernier in the vernier pipe at vernier place reduces the load of float.But it also exists following deficiency: float and vernier are sliding friction, cause friction factor large, thus make friction force large and the precision of impact measurement and sensitivity, even can not use.This can find out from the result of calculation another Chinese patent ZL200910219681.X instructions.

And for example Chinese patent ZL9923472.9, its advantage is also that structure is simple, improve the usable range of temperature, but it exists the deficiency of aforementioned patent equally, namely affect measuring accuracy and sensitivity because friction force is large, to such an extent as to instrument is unavailable.

And for example Chinese patent ZL88218650.7, its advantage is that structure is simple, changes fluid level gauge (buoy) into ball simultaneously, greatly reduces friction force.Its weak point is: 1. float is sliding friction, causes friction factor and friction force greatly, has influence on precision and the sensitivity of measurement; 2. in float, whole circle arranges that magnet steel adds the weight of float, and this certainly will increase the volume of float; 3. the demagnetization temperature limiting serviceability temperature of this liquid level gauge of magnet steel.

And for example Chinese patent ZL200410015416.7, this liquid level gauge solves the application of high-pressure boiler preferably, but its magnetic car needs the parts such as 4 wheels, otherwise vernier can deflect or teetertotters and cannot use, and makes complex structure so first, magnetic car weight amount is second made to be increased, and then add the load of float, this is equivalent to the increase of float weight, and be difficult to the use met in High Temperature High Pressure or high pressure low density medium occasion, remote transfer signal is discontinuous; , then there is aforementioned friction power large, and then affect the problem such as measuring accuracy and sensitivity in sliding friction between float and float chamber described in this patent simultaneously.

Some existing liquid level gauge above-mentioned due to surface temperature high, hidden danger is many, fire hazardous or blast during as easily scalded people or inflammable and explosive dielectric leakage.

For another example in Chinese patent ZL200910219684.3, the float type level gauge of described band buoy is used for the occasion of High Temperature High Pressure or high pressure low density medium, and buoy structure seems complicated, and manufacturing cost is tended towards superiority.And its parts are many, then failure rate is high, affects dependability and causes maintenance cost high.In addition, installing magnet steel in its ball float, the restriction being limited by the demagnetization of magnet steel high temperature then two hemispherical Shells of this ball float cannot adopt and is welded to connect, thus makes this ball float manufacture difficulty.During use, magnet steel also also exists the problem of high temperature demagnetization.

Similar with it, as Chinese patent ZL200910219681.X float type level gauge indicated on the spot also exists above-mentioned same problem.

For another example in Chinese patent application CN103411652, disclosed float is aspheric, and its friction force is large, there is the problem similar with aforementioned patent.Separately, track is had in oil ga(u)ge fixator described in it, magnetic indictor is provided with in track, magnetic indictor is fan-shaped, although the oil ga(u)ge fixator center of gravity of this structure is in below, but be difficult to ensure that described oil ga(u)ge fixator is vertical, namely this oil ga(u)ge fixator is easy to depart from original position gradually in repeatedly upper and lower back and forth movement.In addition,

For another example in Chinese patent ZL201210140345.8, disclosed vernier there are axle and connecting rod and weight to ensure that the center of gravity of vernier is in below, nonetheless, still the axis being difficult to the axle ensured on it is level, namely be difficult to ensure that moving up and down of vernier is vertical, in fact, can wander off gradually in its use procedure.When described liquid level gauge range is little, can normally use.Very large once its range, need effort adjustment meticulously, otherwise the possibility of sideslip increases or the distance of sideslip increases, and namely there is the problem of precision or reliability.In addition, the existence of the axle on vernier and connecting rod and weight, adds the weight of vernier first; Second add mechanical friction, affect precision; Three structures are more complicated, and cost is obviously increased; Four fundamental rules parts are many, also affect the reliability that it uses; The radial magnetic force of five magnet steel is uneven affects precision.

Liquid level gauge described in aforementioned Chinese patent application CN103411652 also also exists above-mentioned similar problem.

Applicant studies discovery further in conjunction with the new relevant disclosed patented claim of nearly 2 years:

As the float type level gauge that vernier disclosed in Chinese utility model patent ZL201420640215.5 or buoy show, still outstanding there are the following problems:

1. friction force is large, obviously delayed, precision is low: through the relative motion test repeatedly and between the linear bearing of multiple import and line slideway, friction force between linear bearing and line slideway is a unavoidable problem, friction force between domestic linear bearing and line slideway is larger, corresponding liquid level gauge neither one is very sensitive, and precision is low, greatly delayed.Inventor the experiment proved that: delayedly after upper reach 3mm, and return difference reaches 8mm.And linear bearing itself is heavier, necessarily increase the weight of vernier, the increase of vernier weight needs larger magnetic force to be coupled, and which in turns increases mechanical friction, also needs the buoyancy of ball float larger thus, brings more relevant issues thus.2. cost remains high: each about more than 50 yuan of the linear bearing of import, about 6 ~ 7 yuan of the line slideway every meter manufactured with aluminium alloy, about 100 yuan of every meter of import, and when range is large, in total cost, accounting is heavy larger.This does not also comprise other parts on vernier.3. guide rail poor rigidity, the rigidity of the cylindrical linear guide rail matched with cylindrical linear bearing reduces with the increase of rail length, and when vernier and ball float under the effect at magnetic coupling force, guide rail can bend to direction, float chamber, cannot use when range is large.This guide rail does not improve its rigidity by installation accessories, otherwise cannot use.Unless used opening linear bearing.If increase the rigidity of guide rail, need increase the diameter of guide rail, this certainly will increase the weight of linear bearing, and this not only further increases mechanical friction, even cannot be able to use because the increase of weight causes ball float to sink in liquid.4. rail joint is many, the quality of fit of line slideway and linear bearing requires very high, line slideway forms through mechanical Precision Machining, the requirement to guide rail rigidity when being limited by mechanical Precision Machining, and each root guide rail cannot be processed very long, when the range of level gauging is large, need the connection of multiple guide rail to form, the two ends of every root guide rail and the connection of other guide rail must ensure precision, and this is the thing of part difficulty, otherwise linear bearing can be stuck in the junction of two guide rails.If increase guide rail rigidity and strengthen guide rail diameter realizing the minimizing of joint, this will certainly increase the size of linear bearing, and then add the weight of vernier, this load can make ball float sink to liquid, make liquid level gauge that 5 bearings cannot be used to keep in repair equally, determining after it enters impurity of linear bearing structure itself is just difficult to cleaning, once enter impurity, just must upgrade, and further increase cost thus.

Existing float level meter can be used for High Temperature High Pressure occasion, is limited by the heatproof of electronic component on it, does not allow insulation or need radiation fin simultaneously near the position of transmitter, causes power consumption, easily scalds the generation of the problems such as people.

Expensive from the magnetic floating ball lever meter of state's imports such as America and Europe, every platform 5 ~ 100,000 yuan.The problem of high temperature resistant and high pressure when it not only also exists difference, the problem of demagnetizing under also there is high temperature occasion, uses several years and need change magnetic ball float, each when changing magnetic ball float, need carry out dismounting, change sealing, the hydraulic testing, tightness test.The price of each resistant to elevated temperatures magnetic float is more than ten thousand yuan.It is reported, when the magnetic ball float of import is used for high temperature occasion, in general 4 ~ 5 years of life-span, the equipment rebuilding phase of petrochemical industry is 3 years, thus, within 3 years, need change the magnetic ball float of an import, and the visible cost of this liquid level gauge that uses is too high.

Utility model content

In view of the problems referred to above existing for prior art, the utility model aims to provide a kind of floating ball type liquid-level meter of high-precision low cost, and it has the structure of more simple science, uses reliable, easy to manufacture, compensate for the defect of prior art, effectively meet the demand of association area.

Solution of the present utility model is achieved in that

A floating ball type liquid-level meter for vernier display, comprises float chamber, the ball float of ferromagnetism material, rule, the vernier outside float chamber and a vernier guide rail; It is characterized in that:

Described vernier comprises magnet steel, framework and level to be fixed and is placed on the rolling system in described framework; Wherein

Described rolling system comprises coaxial scroll wheel, rolling bearing and axle, and described scroll wheel circumferentially surface is provided with radial groove, and described rolling bearing inner ring coordinates with described axle, and described housing washer coordinates with described scroll wheel and rotates thereupon;

Described axle is fixed by described frame supported and is parallel to ground;

It is outside near side, described float chamber that described magnet steel is fixed on described framework, and its magnetic pole is just to described ball float;

It is interior between described magnet steel and rolling system that described vernier guide rail is placed on described framework;

By the magnetic coupling force between described magnet steel and ball float, described scroll wheel to be fitted and along described vernier guide rail scroll-up/down at the working surface of its groove location and described vernier guide rail.

Further, described vernier guide rail is provided with guide rail from top to bottom near side, float chamber and strengthens gusset, by this, reach the rigidity improving described vernier guide rail, and then the effect of the measuring accuracy of guarantee liquid level gauge.

Further, from directly over, on described scroll wheel, the shape of radial groove is corresponding with the shape of described vernier guide rail joint place.

As described in vernier guide rail be cylindrical vernier guide rail, the radial groove of described scroll wheel is the indent circular groove consistent with the arc surface of described cylindrical slideway and its joint place.

The diameter of described indent circular groove is greater than the diameter of cylindrical slideway.

Or described vernier guide rail is cylindrical vernier guide rail, the radial groove of described scroll wheel is trapezoidal groove, then the described scroll wheel similar with trapezoidal groove is in the structure of belt pulley.In described rolling system by under the magnetic coupling force active state between magnet steel and ball float, the trapezoidal groove of described scroll wheel is at least fitted on two inclined-planes that its trapezoidal hypotenuse is formed and described vernier guide rail and along described vernier guide rail scroll-up/down.

And for example, described vernier guide rail is cuboid vernier guide rail; The radial groove of described scroll wheel is rectangular recess, and the spacing of described rectangular recess two interior parallel surfaces is greater than the spacing of two outside surfaces that guide rail corresponds.

Or further, described rolling system comprises two covers, described two cover rolling systems are set in parallel in described same framework up and down, and the plane that forms of two axles wherein and ground perpendicular.Around the rotation up and down of axle, the precision and reliability that use is improved by this to reduce vernier magnet steel in motion process.

Further, described liquid level gauge also comprises the vernier room of the transparent material of a closed nonferromagnetic, and itself and described float chamber adjoin setting, both axis being parallel; It is indoor that described vernier and guide rail are contained in described vernier.In actual use, described vernier must be placed in airtight casing usually, uses to prevent the function influence due to rain, snow, ice, dust etc.

In order to balance the buoyancy of ball float, to ball float one lifting force upwards, can be filled with liquid medium, wherein arrange buoy further by described vernier indoor, it is cursory that described buoy comprises described vernier and is fixed on described vernier.

Described vernier fixed cursory and forms buoy, and being filled with liquid medium in described vernier indoor for described buoy a buoyancy is provided.For the ease of observation, reduce friction force, improve measuring accuracy, avoid volatilization impact to use, the liquid medium of vernier indoor adopts transparent and has the medium of greasy property, as transformer oil or edible wet goods.

Further, as the occasion in High Temperature High Pressure or high pressure low density medium, because the wall thickness of ball float is thicker, the proportion of ball float is comparatively large or be greater than the proportion of measured medium, in order to balance the gravity of ball float, to ball float one lifting force upwards, also can adopt following technical scheme: on the basis of preceding solution, and then set up fixed pulley system, it is fixed on directly over described vernier, its connecting rope one end connects balance bob, and the other end connects described framework.

Cuboid guide rail and radial groove are the friction force calculated example between the scroll wheel of rectangular recess: as the force analysis of Fig. 9 (a) and Fig. 9 (b), if the scroll wheel of rectangular recess and cuboid guide rail are 40mm perpendicular to the contact length up and down on ground, the weight W=40 gram of vernier, if the material expansion coefficient of the scroll wheel of rectangular recess is greater than the material expansion coefficient of cuboid guide rail, after being heated, the scroll wheel of rectangular recess and the end play of cuboid guide rail is caused to be 0.1mm, in this case, the upper end of the scroll wheel of rectangular recess may be attached on the side outer wall of cuboid guide rail, the lower end of the scroll wheel of rectangular recess may be attached on the opposite side outer wall of cuboid guide rail, force analysis is done with the axis centre of the scroll wheel of rectangular recess, tensile force f=W=40 gram upwards suffered when vernier and ball float balance, side direction horizontal component N and N ' that the two ends up and down of the scroll wheel of rectangular recess act on cuboid guide rail is:

The aggregate level component at upper and lower two ends is N+N '=0.1+0.1=0.2 gram, and the mechanical friction coefficient of steel to steel is K=0.2, it can thus be appreciated that the mechanical friction up and down suffered by vernier is (N+N ') Xk=0.04 gram.

If liquid medium is water in float chamber, proportion is 1g/cm 4 DEG C time ³, ball float diameter D be 100mm, ball float immerses the position of liquid half, the buoyancy that liquid level change 1mm produces is changed to 5X5X3.14X0.1X1=7.85 gram, and as can be seen here, the measurement impact of mechanical friction on liquid level of above-mentioned 0.04 gram is very little.

Further, described liquid level gauge also comprises a vernier for subsequent use, and described vernier for subsequent use is positioned at the top of vernier indoor, and it utilizes magnetic couple to fix by the magnet steel being fixed on vernier outdoor; The magnet steel of vernier outdoor is fixed on vernier outdoor by securing member.

Rolling containing impurity effect ball float in liquid, there is protruding ball float track described float chamber on the inwall of vernier side, when ball float is moved up and down, is not attached on float chamber's inwall, such as, is provided with 2 ball float tracks.

In order to reduce the friction force between vernier and track, coated teflon on the workplace that described scroll wheel is adjacent in its groove location and described vernier guide rail.

For consideration that is high temperature resistant, high pressure resistant, corrosion-resistant and reduction ball float proportion, the protective layer of the ball float outer cladding carbon fiber of described ferromagnetism material.Because the low-density of carbon fiber, high strength, high temperature resistant, the corrosion-resistant overall proportion of ball float that makes reduce, make it to can be used for occasion and the mordant medium simultaneously of High Temperature High Pressure or high pressure low density medium.In like manner, described ball float outward also can the protective layer of coated teflon.

Or, for high temperature resistant, high pressure resistant and corrosion resistant consideration, the protective layer of the resistant to elevated temperatures high-alloy steel material of ball float outer cladding of described ferromagnetism material, as 304,316 or CrMo steel etc., or described ball float adopts the high-alloy steel of ferromagnetism material, as 2Cr13.

In like manner, for corrosion resistant consideration, described float chamber can make with plastics (as teflon) or glass etc., or the inwall of float chamber is lined with corrosion-resistant coating.

In order to liquid level display is eye-catching clear, described vernier scribbles eye-catching mark and/or the described vernier surface coating luminescent layers such as such as redness, described luminescent layer can adopt rare earth self-luminescent material.

During use, when ball float and vernier depart from, in order to make both again be coupled, the position of ball float can be found by hand-held one block of magnet steel, then with hand by vernier or attract vernier to draw after near ball float when vernier room exists with magnet steel to unclamp hand or remove hand-held magnet steel.When suspecting whether the position of vernier and ball float coincide, just can know after the position comparison residing for the position of searching ball float and vernier can being gone with magnet steel.

In addition, consider heat insulation or every cold and realize energy-conservation requirement, heat-insulation layer or Cold-keeping Layer can be established between the outer wall of described float chamber and vernier or vernier room, described heat-insulation layer can adopt Magnesiumaluminumsilicate material, or the heat-barrier material that nano ceramic material forms with silicate or alumina silicate fibre, its thickness several millimeters.Described Cold-keeping Layer can adopt the cold insulation material such as polyurethane or urea amine fat.Because the magnet steel of above-mentioned liquid level gauge described in the utility model and the spacing of ball float can reach 12 millimeters, therefore also can consider to carry out integral heat insulation to float chamber, and at all not affect display after insulation, realize energy-conservation thus, also be beneficial to and slow down magnet steel demagnetization.

In order to prevent magnet steel from breaking into pieces because surprisingly falling from eminence, the lower of described vernier indoor can be fixed with spring or filling soft material.

In order to reduce the weight of spherical ball float, ball float makes hollow.

In order to realize teletransmission, near magnet steel, arrange magneto sensor from top to bottom.

The principle of work of the floating ball type liquid-level meter of vernier display of the present utility model is achieved in that

The buoyancy F1 that ball float immerses suffered by liquid one half equals the gravity G1 of ball float and the gravity G2 of vernier and mechanical friction f sum, i.e. F1=G1+G2+f.

When having balance bob, the buoyancy F1 that ball float immerses suffered by liquid one half adds that the gravity G3 of balance bob equals the gravity G1 of ball float and the gravity G2 of vernier and mechanical friction f sum, i.e. F1+G3=G1+G2+f.

The ball float being positioned at float chamber is coupled with vernier all the time, and during liquid level lifting, this equilibrium of forces is broken, and ball float makes vernier be elevated with liquid level lifting, and namely the position of the corresponding rule of the pointer on buoy can read liquid level.

And then, when vernier indoor are filled with liquid medium (proportion of described buoy is less than the proportion of vernier indoor liquid medium), ball float immerses buoyancy F2 sum suffered by buoyancy F1 suffered by liquid one half and buoy and equals the gravity G1 of ball float and the gravity G2 of buoy and mechanical friction f sum, i.e. F1+F2=G1+G2+f.Both realize equilibrium of forces by magnetic coupling force, that is: buoy by the magnetic coupling with ball float to the ball float in float chamber one lifting force upwards.The ball float being positioned at float chamber is coupled with buoy all the time, and during liquid level lifting, this equilibrium of forces is broken, and ball float makes buoy be elevated with liquid level lifting, and namely the position of the corresponding rule of the pointer on buoy can read liquid level.

Compared with prior art, the beneficial effect of the utility model technical solution is apparent, comprising:

The trackability that vernier (or magnet steel) and ball float are elevated is fabulous, and delayed little, precision is high.The structure of vernier is simple, and very lightly, the material of its associated components is aluminium matter, and part is little, thin, and gently, the alleviating of weight means can realize coupling with little magnet steel or less magnetic force, therefore can reduce friction force further, improve precision.There is not mess code that magnetic flap level gauge occurs and complex structure, parts are many, cost is high problem in it, more demonstrate its advantage when wide range, only a vernier just instead of several magnetic turnover panels.Also the problem of glass plate liquid level gauge reading numerical values difficulty is overcome.Overcome glass plate liquid level gauge and the large problem of magnetic flap level gauge energy consumption simultaneously.Meanwhile, many defects such as also overcome the friction force existing for liquid level gauge adopting linear bearing large, precision is low, greatly delayed, use reliability difference.Therefore the utility model solves prior art and measures the inaccurate or insecure difficult problem of instruction liquid level, cost performance is high, there is applicability very widely, especially solve this kind of structure liquid level gauge for a world-class difficult problem for the such as level gauging such as High Temperature High Pressure or high pressure low density medium and solve many dare not by a difficult problem for the occasion level gauging of glass plate liquid level gauge;

Meanwhile, the O&M cost of manufacturing cost and user all significantly reduces, and meets the demand of more users; Compare the cost of linear bearing several ten yuan/and line slideway unit/rice up to a hundred thereof, whole vernier cost of the present utility model only needs about 10 yuan, wherein vernier guide rail only needs a few unit/rice, the quality of fit of vernier guide rail of the present utility model and scroll wheel requires low, vernier guide rail can use aluminium section bar one-shot forming, do not need reprocessing, significantly reduce cost thus;

And it is easier to manufacture and keep in repair.High precision guide rail is difficult to the longer of manufacture, and when range is large, many groups can only be adopted right, and this is the thing of part difficulty at the scene, and the utility model avoids this problem; The one-time formed joint length of vernier guide rail aluminium section bar of the present utility model at least can reach 6 meters, and thereby reduce the joint quantity between guide rail, this is except reducing costs, and makes manufacture and maintenance easier, uses more reliable;

Further, vernier and rolling system architecture thereof are simple, and manufacture, assembling, adjustment, installation and on-site proving and in the future safeguarding all is more prone to;

Meanwhile, alleviating of vernier weight, makes it the scope of application wider, occasion as little in fluid density; And the alleviating of vernier weight, making it need not increase counterweight in many situations can use;

Further, the magnet steel on vernier, outside float chamber, away from float chamber, not easily demagnetizes, even if demagnetization, changes magnet steel also easier; When eliminating each replacing magnetic ball float thereupon, dismounting need be carried out, change a series of trouble and the losses such as sealing, the hydraulic testing, tightness test, especially change the magnetic ball float of import, lose larger.

And the outfit of vernier for subsequent use, then eliminate the trouble in the past changing vernier.

In addition, when vernier pointer makes redness or adopt luminescent materials, it indicates and shows very intuitively eye-catching;

The utility model improves high temperature resistant, high pressure resistant, the corrosion resistant performance of liquid level gauge about the use of protective layer is more effective, as the ball float outer cladding anticorrosive coat of ferromagnetism material, high temperature resistant, high pressure resistant, the corrosion resistant performance of ball float is improved further;

The design of heat-insulation layer or Cold-keeping Layer is then in order to realize energy-saving effect.Float chamber's outer wall allows insulation, and insulation thickness several millimeters can meet the demands; Use safer, as fire, blast can not be caused, can not scald people simultaneously; For cold pipeline, not easily frosting or icing;

When comparing float level meter for High Temperature High Pressure occasion, be limited by the heatproof of electronic component on it, do not allow insulation or need radiation fin simultaneously near the position of transmitter, cause power consumption, easily scald the problems such as people, the utility model is then without this anxiety.

To sum up, inventor is through the theory more than 6 years and various lot of experiments and experiment, prove that structure of the present utility model overcomes all deficiencies of prior art, solve the technical barrier that this area is urgently to be resolved hurrily: its technique effect give prominence to be embodied in its mechanical friction greatly reduce, delayed little, precision is high, structure is very simple, cost reduces greatly, stable and reliability obtains breakthrough raising, its integrated performance index is much better than the magnetic float liquidlevel meter of state's imports such as America and Europe, substitute import, foreign exchange earning, application prospect is very extensive.

Accompanying drawing explanation

Fig. 1 is the structural representation of embodiment 1;

Fig. 2 is the A-A cut-open view of Fig. 1;

Fig. 3 (a), Fig. 3 (b) are the schematic diagram of two kinds of forms that the scroll wheel of trapezoidal groove matches with vernier guide rail;

The structural representation of Fig. 4 embodiment 2;

Fig. 5 is the B-B cut-open view of Fig. 4;

Fig. 6 is the structural representation of embodiment about 3 two scroll wheels;

Fig. 7 is the structural representation of embodiment 4;

Fig. 8 is the structural representation of embodiment 5;

Fig. 9 (a) is the force analysis figure of friction force between rectangular recess scroll wheel and guide rail;

Fig. 9 (b) is the left view of Fig. 9 (a).In figure:

1. ball float 2. float chamber 3. cylindrical slideway 3 '. gusset 8. vernier 8-1 strengthened by cuboid guide rail 4. fixed pulley 5. connecting rope or connecting belt 6. rule 7. guide rail, 8-1 '. rolling bearing 8-2. magnet steel 8-3,8-3 '. axle 8-4,8-4 '. the liquid medium 16. ball float track of the magnet steel 14. vernier 15. vernier for subsequent use indoor of the cursory 13. external fixing verniers for subsequent use of the liquid medium 12. in trapezoidal groove 9. balance bob 10. vernier room 11. float chamber of the rectangular recess 8-43. scroll wheel of the circular groove 8-42. scroll wheel of scroll wheel 8-5. rectangular frame 8-41. scroll wheel.

Embodiment

Embodiment 1

(1) basic model

A kind of floating ball type liquid-level meter of vernier display, as depicted in figs. 1 and 2, comprise the float chamber 2 of nonferromagnetic material, the spherical ball float 1 of ferromagnetism material in float chamber 2, float chamber 2 arranges rule 6, cylindrical slideway 3 outer adjoining with it, and the vernier room 10 of closed nonferromagnetic transparent material, described rule 6, the axis of cylindrical slideway 3 and the axis of vernier room 10 parallel to each other and be parallel to the axis of described float chamber 2, vernier 8 and cylindrical slideway 3 are arranged in vernier room 10 respectively;

Described cylindrical slideway 3 is provided with guide rail at it from top to bottom near side, float chamber 2 and strengthens gusset 7;

Wherein, described vernier 8 comprises magnet steel 8-2, rectangular frame 8-5 and rolling system, and described rolling system comprises circumferentially surface and is provided with scroll wheel 8-4 and the axle 8-3 and rolling bearing 8-1 thereof of radial groove;

Described rectangular frame 8-5 has 4 side X1 perpendicular to surface level, X1, Y1, Y2;

Described magnet steel 8-2 is between described float chamber 2 and rectangular frame 8-5 and be fixed on described rectangular frame 8-5 outside the side X1 of described float chamber 2, and the magnetic pole of described magnet steel 8-2 is just to described ball float 1;

The described parallel ground of axle 8-3 is supported on two parallel side Y1 and Y2 of described rectangular frame 8-5, and described two parallel side Y1 and Y2 are the plane perpendicular with the described side X1 it securing magnet steel;

Described rolling system comprises coaxial scroll wheel, rolling bearing and axle, and described scroll wheel circumferentially surface is provided with radial groove, described rolling bearing inner ring and described axle interference fit, and described housing washer and described scroll wheel interference fit are also rotated thereupon;

Described cylindrical slideway 3 to be placed in described rectangular frame 8-5 and between described magnet steel 8-2 and rolling system;

Described rolling system realizes described scroll wheel 8-4 by the magnetic coupling force between magnet steel 8-2 and ball float 1 and to fit and along described cylindrical slideway scroll-up/down at the working surface of its groove location and described cylindrical slideway 3.The radial groove of described scroll wheel is the indent circular groove 8-41 that its corresponding cylindrical slideway corresponding circle cambered surface matches.

The radial groove of described scroll wheel also can be trapezoidal groove 8-43, and as shown in Fig. 3 (a) He Fig. 3 (b), namely described trapezoidal groove 8-43 structure is the corresponding construction being similar to belt pulley wide outside and narrow inside.Under the magnetic coupling force active state between the magnet steel and ball float of described vernier, the trapezoidal groove 8-43 of described scroll wheel at least fits on two inclined-planes that its trapezoidal hypotenuse is formed and described cylindrical slideway 3 and along described cylindrical slideway 3 scroll-up/down, as shown in Fig. 3 (a).Or the trapezoidal groove 8-43 of described scroll wheel to fit and along described cylindrical slideway 3 scroll-up/down at 3 medial surfaces of its trapezoidal groove 8-43 and described cylindrical slideway 3, as shown in Fig. 3 (b).

(2) protection type

For dustproof and waterproof consideration and to the impact avoiding wind and frost sleet on instrument, described liquid level gauge also can comprise the vernier room 10 of the transparent material of a closed nonferromagnetic further, and itself and described float chamber 2 adjoin setting, both axis being parallel; Described vernier 8 and cylindrical slideway 3 are contained in described vernier room 10.The inner upper projection size of described vernier room 10, slightly larger than the projection size above vernier, looks down from top, is a square box structure.At normal temperatures, the rectangular projection size 0.05-0.08 millimeter that the rectangular projection size of described vernier room 10 inner upper is greater than above vernier with every side is advisable.If for high temperature or low temperature situation, the amount of expanding with heat and contract with cold of vernier room 10 and vernier 8 should be considered respectively.

(3) fixed pulley type

In addition, for some occasion, such as in the occasion of High Temperature High Pressure or high pressure low density medium, because the wall thickness of ball float 1 is larger, the proportion of ball float 1 is greater than the proportion of measured medium, in order to balance the gravity of ball float 1, needs to ball float 1 one lifting force upwards, then can set up fixed pulley 4 on the basis of technique scheme, balance bob 9 and connecting rope or connecting belt 5.Described fixed pulley 4 is fixed on the top inside vernier room 10, and connecting rope or connecting belt 5 walk around fixed pulley 4, and two ends connect the rectangular frame 8-5 of described balance bob 9 and vernier 8 respectively.

Under conventional occasion, the weight G2 that the weight G3 of balance bob 9 is greater than vernier 8 with make ball float 1 and vernier 8 is formed all the time up and down between pulling force, avoid the centre at magnet steel 8-2 between ball float 1 and vernier 8 to form dead band, produce delayed.The size of this pulling force, deducts described mechanical friction f to be greater than to comprise suffered mechanical friction f in vernier and ball float motion process and be less than ball float 1 again with the bonding force of maximum magnetic flux up and down of vernier 8.The gravity G3 that the gravity G1 of ball float 1 is greater than balance bob 9 deducts the gravity G2 of vernier 8 and is less than required pulling force when ball float 1 is separated with vernier 8 bonding force and deducts mechanical friction f again, and leaves safety allowance.Gravity G1 as: ball float 1 deducts the gravity G2 that gravity G3 that the ball float 1 buoyancy F1 immersed suffered by liquid one half equals balance bob 9 deducts vernier 8 and deducts mechanical friction f again.Now, the gravity G2 that the gravity G3 that magnetic coupling force must be greater than balance bob 9 deducts vernier 8 adds mechanical friction f.

Embodiment 2

The floating ball type liquid-level meter of another vernier display, as shown in Figure 4 and Figure 5, its protection type with embodiment 1 different be in, described vernier guide rail is cuboid guide rail 3 '; Accordingly, the radial groove of described scroll wheel 8-4 is rectangular recess 8-42, and the spacing of described rectangular recess 8-42 two interior parallel surfaces is greater than the spacing of two outside surfaces corresponding with guide rail 3 '.Under magnet steel 8-2 on vernier 8 and the magnetic coupling interaction of ball float 1, described scroll wheel 8-4 rolls along the working surface of described cuboid guide rail 3 '.

Further, the trouble of magnet steel 8-2 is changed after magnet steel 8-2 demagnetization, described liquid level gauge top position in its vernier room 10 is provided with a vernier 14 for subsequent use, and correspondence fixes the magnet steel 13 of a fixing vernier for subsequent use outward by securing member in vernier room 10, and realize fixing vernier 14 for subsequent use by described magnet steel 13 with the magnetic coupling of the magnet steel of described vernier 14 for subsequent use.

Embodiment 3

The floating ball type liquid-level meter of another vernier display, it is on the basis of aforementioned liquid level gauge, improves its vernier 8, namely described vernier 8 comprises the described rolling system of two covers, namely comprises two scroll wheel 8-4,8-4 ' and respective axle 8-3 thereof, 8-3 ' and rolling bearing 8-1,8-1 ', as shown in Figure 6.Described two cover rolling systems are set in parallel in described same rectangular frame 8-5 up and down, and two axle 8-3 wherein, the plane that 8-3 ' is formed and ground perpendicular, by this to avoid vernier 8 to produce rotation around axle in the process of moving up and down, improve the precision and reliability that use.

Embodiment 4

The floating ball type liquid-level meter of a vernier display again, as shown in Figure 7, on its basis based on the technical scheme of aforementioned various liquid level gauge, consider the needs of the buoyancy of balance ball float 1, the below of described vernier 8 is fixed cursory 12 and is formed buoys, and described cursory 12 also can above described vernier 8, simultaneously, in described vernier room 10, be filled with liquid medium 15, provide a buoyancy to described vernier or buoy.

The proportion of described vernier is less than the proportion of liquid 15 in described vernier room 10, under equilibrium state, the gravity G1 that the gravity G2 that buoyancy F2 suffered by vernier 8 deducts vernier equals ball float 1 deduct ball float 1 immerse liquid only about half of time buoyancy F1 suffered by ball float, i.e. F2-G2=G1-F1.

Embodiment 5

As shown in Figure 8, on the basis of aforementioned various liquid level gauge, in order to avoid the rolling containing impurity effect ball float 1 in the liquid medium 11 in float chamber further, there are 2 protruding ball float tracks 16 described float chamber 2 on the inwall of vernier 8 side, when moving up and down to make ball float 1, under the support of described spherical track 16, be not directly attached on float chamber 2 inwall, in order to avoid blocked by impurity.

For the various liquid level gauges provided in above-described embodiment, also can consider for different technique effects, and make further improvement, such as:

In order to reduce the friction force between scroll wheel and vernier guide rail, radial groove working surface (i.e. described groove and rectilinear orbit are adjacent to mutually and along the mating surface of non-orbiting scroll) the coated teflon protective layer at described scroll wheel 8-4 can be taked.

For consideration that is high temperature resistant, high pressure resistant, corrosion-resistant and reduction ball float 1 proportion, can at the ball float 1 outer cladding carbon fiber protective layer of described ferromagnetism material.

Or for corrosion resistant consideration, can at the ball float 1 outer cladding protective layer of described ferromagnetism material, as the protective layer of coated teflon.

For high temperature resistant, high pressure resistant and corrosion resistant consideration, at the protective layer of the resistant to elevated temperatures high alloy steel of ball float 1 outer cladding of described ferromagnetism material, as 304,316 or CrMo steel etc., maybe can adopt high-alloy steel, as 2Cr13, make described ball float.

Same for corrosion resistant consideration, described float chamber 2 can use plastics, and as teflon, or glass etc. is made, or the inwall lining corrosion-resistant coating of float chamber.

Eye-catching clear in order to show, can adopt and apply such as red mark and/or coating rare earth self-luminescent material layer on described vernier 8.

In order to heat insulation or every cold and realize energy-conservation, can arrange between the outer wall of described float chamber 2 and vernier 8 or vernier room 10 and be incubated or Cold-keeping Layer, Magnesiumaluminumsilicate material is adopted as heat insulation, or the heat-barrier material that nano ceramic material forms with silicate or alumina silicate fibre, its thickness several millimeters can meet the demands.Every cold, polyurethane or urea amine fat material can be adopted.And realize energy-conservation thus.

In order to prevent vernier 8 from breaking into pieces because surprisingly falling from eminence, spring or filling soft material can be set the below in vernier room 10.

In order to reduce the weight of spherical ball float 1, ball float 1 can make hollow.

For the ease of observation, reduce friction force, improve measuring accuracy, avoid volatilization impact to use, the liquid medium 15 in vernier room 10 adopts transparent and has the medium of greasy property, as transformer oil or edible wet goods.

In order to realize teletransmission, near the magnet steel 8-2 of described vernier 8, arrange magneto sensor from top to bottom.

During use, when ball float 1 and vernier 8 depart from, again be coupled to make both, the position of ball float 1 can be found by hand-held one block of magnet steel, then draw by vernier 8 or when vernier room 10 exists with magnet steel attraction vernier 8 with hand and unclamp hand after near ball float 1 or remove hand-held magnet steel.

Inventor did equipment control for many years, do excess pressure container and pipe design, be devoted to study multiple liquid level gauge, did many experiments, and used the time more than 6 years, consider precision, cost, the reliability used, maintenanceability, solve existing technical barrier, consider energy-conservation simultaneously, the process conditions be suitable for, the market demand, processibility, on the basis of all factors such as the maintenance cost of user, and the preferred version designed after carrying out Strength co-mputation and Material selec-tion to ball float and float chamber also finally forms the technical solution of the utility model, be intended to for the needs of liquid level gauge for various different occasion, comprise the difficult problem such as solving High Temperature High Pressure or the measurement of high pressure low density medium medium liquid level, and many occasions dare not use difficult problem of glass plate liquid level gauge etc.

The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to according to the technical solution of the utility model and inventive concept thereof and replace or change, all should be encompassed within protection domain of the present utility model.

Claims (16)

1. a floating ball type liquid-level meter for vernier display, comprises float chamber, the ball float of ferromagnetism material, rule, the vernier outside float chamber and a vernier guide rail; It is characterized in that:

Described vernier comprises magnet steel, framework and level to be fixed and is placed on the rolling system in described framework; Wherein:

Described rolling system comprises coaxial scroll wheel, rolling bearing and axle, and described scroll wheel circumferentially surface is provided with radial groove, and described rolling bearing inner ring coordinates with described axle, and described housing washer coordinates with described scroll wheel and rotates thereupon;

Described axle is fixed by described frame supported and is parallel to ground;

Described magnet steel is fixed on described framework outside near side, described float chamber, and its magnetic pole is just to described ball float;

It is interior between described magnet steel and rolling system that described vernier guide rail is placed on described framework;

By the magnetic coupling force between described magnet steel and ball float, described scroll wheel to be fitted and along described vernier guide rail scroll-up/down at the working surface of its groove location and described vernier guide rail.

2. the floating ball type liquid-level meter of vernier display as claimed in claim 1, is characterized in that:

Described vernier guide rail is provided with guide rail from top to bottom near side, float chamber and strengthens gusset.

3. the floating ball type liquid-level meter of vernier display as claimed in claim 1 or 2, is characterized in that:

On described scroll wheel, the shape of radial groove is corresponding with the shape of described vernier guide rail joint place.

4. the floating ball type liquid-level meter of vernier display as claimed in claim 3, is characterized in that:

Described vernier guide rail is cylindrical slideway, and the radial groove of described scroll wheel is the indent circular groove consistent with the arc surface of described cylindrical slideway and its joint place.

5. the floating ball type liquid-level meter of vernier display as claimed in claim 1 or 2, is characterized in that:

Described vernier guide rail is cylindrical slideway, and the radial groove of described scroll wheel is trapezoidal groove;

In described rolling system by under the magnetic coupling force active state between magnet steel and ball float, the trapezoidal groove of described scroll wheel at least to be fitted and along described cylindrical slideway scroll-up/down at the working surface of two interior inclined-planes that its trapezoidal hypotenuse is formed and described cylindrical slideway.

6. the floating ball type liquid-level meter of vernier display as claimed in claim 3, is characterized in that:

Described vernier guide rail is cuboid guide rail; The radial groove of described scroll wheel is rectangular recess.

7. the floating ball type liquid-level meter of vernier display as claimed in claim 1 or 2, is characterized in that:

Described rolling system comprises two covers, and described two cover rolling systems are set in parallel in described same framework up and down, and the plane that forms of two axles wherein and ground perpendicular.

8. the floating ball type liquid-level meter of vernier display as claimed in claim 1 or 2, is characterized in that:

Also comprise the vernier room of the transparent material of a closed nonferromagnetic, itself and described float chamber adjoin setting, both axis being parallel; It is indoor that described vernier and guide rail are contained in described vernier.

9. the floating ball type liquid-level meter of vernier display as claimed in claim 8, is characterized in that:

Described vernier indoor are filled with liquid medium, wherein arrange buoy, and it is cursory that described buoy comprises described vernier and is fixed on described vernier.

10. the floating ball type liquid-level meter of vernier display as claimed in claim 8, is characterized in that:

Also comprise a vernier for subsequent use, described vernier for subsequent use is positioned at the top of vernier indoor, and it is fixed by the magnet steel being fixed on vernier outdoor.

11. as claim 1, and the floating ball type liquid-level meter of 2,9 or 10 arbitrary described vernier displays, is characterized in that:

Also comprise fixed pulley system, it is fixed on directly over described vernier, and its connecting rope one end connects balance bob, and the other end connects described framework.

The floating ball type liquid-level meter of 12. vernier displays as claimed in claim 8, is characterized in that:

Also comprise fixed pulley system, it is fixed on directly over described vernier, and its connecting rope one end connects balance bob, and the other end connects described framework.

13. as claim 1, and the floating ball type liquid-level meter of 2,9 or 10 arbitrary described vernier displays, is characterized in that:

The ball float outer cladding protective layer of described ferromagnetism material, described protective layer adopts carbon fiber, teflon material or high-alloy steel material.

The floating ball type liquid-level meter of 14. vernier displays as claimed in claim 8, is characterized in that:

The ball float outer cladding protective layer of described ferromagnetism material, described protective layer adopts carbon fiber, teflon material or high-alloy steel material.

15. as claim 1, and the floating ball type liquid-level meter of 2,9 or 10 arbitrary described vernier displays, is characterized in that:

The inwall of described float chamber (2) near vernier (8) side is provided with protruding ball float track.

The floating ball type liquid-level meter of 16. vernier displays as claimed in claim 8, is characterized in that:

The inwall of described float chamber (2) near vernier (8) side is provided with protruding ball float track.