CN101706310B - Continuous remote transmission float type level gauge - Google Patents
Continuous remote transmission float type level gauge Download PDFInfo
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- CN101706310B CN101706310B CN2009102196839A CN200910219683A CN101706310B CN 101706310 B CN101706310 B CN 101706310B CN 2009102196839 A CN2009102196839 A CN 2009102196839A CN 200910219683 A CN200910219683 A CN 200910219683A CN 101706310 B CN101706310 B CN 101706310B
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Abstract
The invention relates to a continuous remote transmission floater type level gauge, which comprises a floater and a magnetic connector, the continuous remote transmission floater type level gauge is characterized in that: the level gauge further comprises an electrically conductive or magnetically inductive and electrically conductive guide rail, and at least one guide rail is covered by an insulating layer and wound with resistance wires; the magnetic connector comprises an insulating case and a magnetic shaft or a metal shaft arranged horizontally; for the magnetic floater type level gauge, the magnetic connector further comprises a magnetic steel; the magnetic shaft or the metal shaft moves up and down along the guide rail with the up-and-down movement of the floater under the action of magnetic force; and a corresponding liquid level value is obtained by measuring a resistance value in a conducting loop consisting of the guide rail, the magnetic shaft or the metal shaft so as to realize continuous remote transmission of liquid level data. The continuous remote transmission floater type level gauge can further comprise a fixed slide pulley, a balance weight, a connecting rope or a balancing magnetic connector brought by connection. The continuous remote transmission floater type level gauge has remarkable characteristics of simple structure and continuous remotely transmitted signal.
Description
Technical field
The present invention relates to the level gauging field, particularly a kind of float-type of continuous remote transmission or magnetic float type level gauge.
Background technology
Liquid level gauge is an application scenario instrument extremely widely, and a lot of people study the problem that prior art exists.
Existing level gauging instrument, of a great variety, multifarious, have his own strong points, also exist deficiency, the scene indication that the existing instrument of determining based on quasi-solution of the present invention exists is unintelligible, dark occasion or be difficult to observation night, remote transfer signal is discontinuous, and teletransmission is overlapped mechanisms with indication on the spot with two, the big a series of problems such as measuring accuracy that influence of friction force are as follows with existing correlation technique division:
One existing indicating type on the spot and/or have the float type level gauge of teletransmission in addition
Various occasions need indicating type liquid level instrument on the spot, and glass plate liquid level gauge commonly used is easily contaminated, influence observation direct-reading, and two-colour fluviograph can not be used for the high pressure occasion.
Various occasion light is bad, and existing on-the-spot indicating instrument observation direct-reading difficulty especially night, from energy-conservation angle, can not be adorned an illuminating lamp for each field instrument and be used for observation on factory building or scene.
As the disclosed a kind of scheme of patent No. CN86101109B: its roller bearing pulley moves up and down at float upper edge guide rail, relies on the spotlight irradiates light photosensitive elements on the float to realize on-the-spot indication and teletransmission.Its advantage is the friction force that does not have magnetic coupling force to cause, but its weak point is: 1. signal is discontinuous.2. electric guide rail immerses in the liquid, must select for use resistant material to make, and explosion-proof occasion can not use, and brush can be with medium to flow on the float from guide rail when moving up and down.3. there is problem of aging in elastic insulated circle, and influence is reliably used.4. elastic insulated circle, spotlight and light-passing board are present in float chamber, have determined it can not be used for the High Temperature High Pressure occasion.5. to spotlight power supply with adhere to two loops and float measurement and light activated element separately to the light activated element power supply partly each is independent respectively, i.e. magnetic float pulley and track, the teletransmission sensor has used one to overlap fixed support again, has caused complex structure.6. roller bearing pulley and spotlight etc. place on the float, have further increased the quality of float, and then need to increase the volume and the thickness of float and float chamber housing, more are not suitable for the low-density high-pressure field of force in this case and close down use.7. the spotlight surface easily forms gathering dust on moisture film or the light activated element and influences use.8. do not have well on-the-spot indication, be not easy to range estimation.9. signal is discontinuous.10. the internals of float chamber housing are many, and when being used for the strong corrosive medium occasion, its internals must all be selected expensive resistant material for use, cause cost to raise.
As described in ZL99220056.3, ZL94235895.3, ZL200820107045.9, ZL94206404.6, ZL89210466.X, respectively there are the following problems for their: 1. complex structure, huge, gear train line wheel is many, friction force is big, influences precision and sensitivity.2. on-the-spot indication is unintelligible, range estimation difficulty, especially night or when dark.3. the no teletransmission or the remote transfer signal that have are discontinuous.4. skid and cause cumulative errors.5. on-the-spot indication and two independently mechanisms of teletransmission cause complex structure, the cost height.
As described in ZL200410015416.7, this liquid level gauge has solved the application of high-pressure boiler preferably, but has following deficiency: 1. on-the-spot indication and teletransmission two structural members or fixing skeleton make it complex structure.2. remote transfer signal is discontinuous.3. the magnetic car needs 4 wheels, otherwise vernier can deflection or is teetertottered and can't use, make complex structure so first, magnetic car weight amount is increased, and then increased the load of float, the increase that this is equivalent to float weight is difficult to satisfy the use in High Temperature High Pressure or high pressure low density medium occasion.4. on-the-spot range estimation inconvenience.5, float and float chamber are sliding friction, and friction force is big, show to lag behind.
As described in ZL89210640.9, this liquid level gauge adopts rolling friction to reduce friction force, its weak point is: 1, the signal is far passed partly need add the slide wire resistor of a band skeleton and the lever arm of slide wire resistor in addition, makes complex structure, has increased friction force in addition.Though 2 to mention float be simple with spherical, but when float adopts nonferromugnetic material, inlay ferrimagnet at waterline (liquid level line) or equatorial zone, can form sliding friction thus causes friction force big, as seen this inventor only considers that the ball float manufacturing is simple, add at waterline or equatorial zone and inlay ferrimagnet and mention the sliding friction scale removal, as seen this inventor does not consider the influence of float shape to friction force.And for example application number is that 02132734.3 application for a patent for invention, ZL92203633.0, ZL99234762.9 and ZL88218650.7 are described, exists the above some problem equally, and does not have teletransmission.Application number is that its float chamber internals are many in 02132734.3 the application for a patent for invention, need select high-temperature bearing, resistant material or the like for use in some occasions.
As described in ZL97225950.3, it is big also to exist friction force, uses magnetic to turn over the insecure problem of part, and the circuit complexity.
And for example publication number is that 87102867A is described, and its advantage is that on-the-spot range estimation is convenient.But have following deficiency: 1. float is an opening, and condensed fluid easily is deposited on float inside, and influence is normally used.2. complex structure is only for a lot of parts of on-the-spot clear display.3. exist some cited problems of aforementioned ZL200410015416.7 simultaneously.In addition, discontinuous, unreliable with the tongue tube signal, and the circuit complexity.
ZL97243163.2 is described for another example, and its advantage is that on-the-spot indication is clear, but remains following deficiency: 1. used two pairs of static contacts, connected different light emitting diodes, made switch and light-emitting component many, influenced reliability.2. element is many, and structure is more complicated.3. signal is discontinuous.
Two. existing nothing is indicated on the spot and the float type level gauge of teletransmission is arranged
As described in ZL99203851.0 and ZL02215560.0, their advantage is simple in structure, and weak point is: 1. sensing element inserts in the pipe of stretching in vessel liquid, non-refractory.High and low temperature all makes resistance variations influence precision.2. middle have the float of guide rod hole not high pressure resistant.3. also need a last in addition cover communicating pipe if realize indication on the spot.4. float easily is stuck.5. make element many with tongue tube, unreliable, signal is discontinuous.6. what the resistance wire of two helix tube types was adjacent is entangled on the insulator, too close easy short circuit, and too space Shadows is rung precision.The impurity that conduction arranged enters when making assembling and easily causes short circuit.Also twining when too thin might can't operate as normal because the some contact of ball cause access failure.7. it is just possible to stop work when keeping in repair.8. have some occasions of internals to use in the container, as heat interchanger, 9. sensor signal is that fluctuation is jumped, that is signal is discontinuous.10, float and guide rod are sliding friction, and friction force is big, show to lag behind.
And for example ZL98229246.5 is described: its advantage is not need magneto sensor, has improved reliability greatly, but following deficiency is also arranged: 1. resistance places in the sensor pipe, and the high temperature occasion can't be used.2. the float of this structure and shell not high pressure resistant (pipe internal pressure-resistant bigger) than proof to external pressure.3. the moving dolly of magnetic has increased float weight and is unfavorable for using under High Temperature High Pressure or high pressure low density occasion.4. signal is discontinuous.5. do not have on-the-spot indication, need add a cover mechanism in addition if increase indication on the spot.6. magnetic moves the vehicle structure complexity.7. magnetic conduction sheet is from the magnet steel distance, and the suction-combining force is reduced.8. there are some occasions of internals to use in the container, as heat interchanger.10, float and guide rod are sliding friction, and friction force is big, show to lag behind.
As described in ZL200520108103.6, its advantage is that remote transfer signal is continuous, optical sensor precision height, but above also existing at the described some shortcomings of ZL98229246.5, need 4 pulleys from drawing simultaneously, the friction force that has increased greatly thus.The magnetic coupling part is sliding friction, and friction force is big, influences precision, shows to lag behind.
Also have the problem of the high low temperature of above-mentioned tolerance as ZL02221869.6, signal is discontinuous, does not have indication on the spot, and components and parts influence reliability more, can't be used for problems such as low-density or high pressure occasion, and the withstand voltage scope of transparent tube has limited its range of application.
Problem in the middle of the above-mentioned prior art of enumerating existing in various degree is following:
1, remote transfer signal is discontinuous;
2, many with precious metal or resistant material, (pulley, bearing, float chamber etc. need by the process conditions the selection of material, as high temperature, and the corrosion occasion), further increased manufacturing cost;
3, higher working pressure or high pressure low-density occasion are difficult to use;
4, counterweight (or balance bob) immerses liquid and influences precision;
5, assembling and demarcation difficulty;
6, ressemble adjustment after the transportation.The structure that has is huge, has increased packing and transportation burden;
7, be more than the friction pair or between float and the tube wall sliding friction to cause friction force big, (friction coefficient mu of steel to steel is 0.15, and the cylindrical radial coefficient of rolling friction of steel to steel is 0.05, and spherical steel ball is below 0.003 to the friction factor of steel.The present invention has adopted the friction structure of the very low steel ball of friction factor to steel) cause demonstration to lag behind, influence precision, even not available.Here what deserves to be mentioned is: a lot of inventors consider how to reduce friction force, but with regard to prior art solution be not very thorough.This point can be known by retrieval prior art and similar products at home and abroad.The inventor who had both made has adopted the way of rolling friction, and its friction factor is still big, and the structure of its design is particularly complicated.Especially existing magnetic float or the float product that is coupled by magnetic force do not have spherical so far.All be that the product of rolling friction exists so far simultaneously between the part that float is coupled by magnetic force with it.
For example: the suction-combining force F between the magnetic coupling part is 200g, then friction force f=F * μ=200g * 0.15=30g.μ is a friction factor.If the diameter of phi=60mm=6cm of float, Media density γ=1, overcome above-mentioned friction force needing the variable quantity of liquid level is Δ L, promptly produces a buoyancy F1 who equates with friction force, that is F1=f, F1=π (Φ/2)
2* Δ L * γ=f,
ΔL＝4f÷(π×γ×Φ
2)＝4×30÷(3.14×1×3
2)＝4.244cm。Hence one can see that, and liquid level change just can make float move for nearly 42.5 millimeters, if Media density is low, this is worth also corresponding increase.If magnetic coupling force is big again, this value further increases.So far find on magnetic coupling type or magnetic float type level gauge that reason with spherical float is because the float domestic demand is wound perpendicular to the axis on ground and arranged a cause of enclosing magnet steel when adopting the magnetic float, comprise and place float chamber outer during magnet steel with float formation magnetic coupling, a lot of people have ignored the influence of this factor of friction force to measuring accuracy, and product both domestic and external is all like this.This shows that friction force is very big to the influence of measuring.
What 8, have is difficult in maintenance, inconvenient maintenance, maintenance cost height.Many as the float chamber internals, must take float chamber apart during maintenance, the dismounting trouble often needs to change sealing after the dismounting.Also to carry out hydraulic pressure and tightness test simultaneously.
9, complex structure need overlap mechanisms with two as scene indication and teletransmission, other complicated mechanical mechanism or the like, and size is huge, poor reliability, cost height.
What 10, float or float chamber need be made is very long, waste material, and size is huge, and the packed and transported burden is heavy.
11, float easily blocks.
Summary of the invention
In view of the above-mentioned all deficiencies of existing in prior technology, the present invention aims to provide a kind of simple in structure, measures the float type level gauge of continuous remote transmission accurately.
One of technical solution of the present invention is the occasion at the normal pressure open-top receptacle:
A kind of float type level gauge comprises float, connecting rope or connects band, fixed pulley and magnetic unitor; Fixed pulley is fixed on the container; Connecting rope or connection band are walked around fixed pulley, and two ends connect float and magnetic unitor respectively;
It is characterized in that:
Also comprise two guide rails and the collets that are positioned at its lower end, described guide rail has magnetic conduction electric conductivity, and vertical fixing is on described collets; And have at least on the guide rail behind the insulation course of covering and be wound with resistance wire;
Described magnetic unitor comprises insulated case, horizontally disposed magnetic axis between two guide rails; Described insulated case respectively with the close biside plate of two guide rails on porose, the end of described magnetic axis cooperates with two holes and exposes respectively that insulated case is outer adsorbs mutually by magnetic force and described guide rail;
Under the state of described magnetic unitor lifting with the liquid level lifting, the variation of measuring by resistance value in the loop that resistance wire and magnetic axis constituted of guide rail and upward winding thereof can obtain level value.
The magnetic unitor also has the effect of balance bob at this, and promptly the weight of described float equals float immerse suffered buoyancy and magnetic unitor weight sum when only about half of in fluid to be measured.
The magnetic force of the magnetic unitor that has a magnetic axis by magnetic axis is adsorbed on two guide rails that permeability magnetic material makes, and guarantee that its contact is good, and the magnetic unitor can not shake disorderly.Magnetic axis long enough on the magnetic unitor, guide rail is near as far as possible, the short circuit that can not form power circuit when making the deflection of the magnetic unitor left and right sides with open circuit, guarantee that reliably working can getaway.
Be with copper sheathing on the magnetic axis of magnetic unitor, with the good conductive of assurance with guide rail.
The principle of work of described float type level gauge is achieved in that
The float that is positioned at container makes the lifting of magnetic unitor with the liquid level lifting, the magnetic axis of magnetic unitor is adsorbed on and does upper and lower elevating movement on the guide rail, for realizing the signal is far passed, twine resistance wire again after covering insulation course on described two guide rails or the guide rail wherein, the liquid level lifting makes the magnetic unitor do upper and lower elevating movement, thereby whole resistance in circuit value is changed, and the resistance value of measuring two ends can realize the teletransmission of signal.If consider the influence of temperature variation, can add a temperature compensation lead or thermo-compensator and compensate to the resistance wire resistance.
For reduce the magnetic unitor move up and down under the state and between the guide rail friction force and to the wearing and tearing of guide rail, bearing is installed respectively in the hole on the biside plate of described insulated case, magnetic axis is supported by described bearing.
For ease of remote range estimation, eye-catching mark is arranged, on the described insulated case as red-label.
For reaching the purpose of dustproof and anti-explosion, the signal is far passed part all can be contained in the casing of a non-magnetic material.
Two of technical solution of the present invention is at the occasion that pressure seal container is arranged:
A kind of float type level gauge, comprise be communicated with tested pressure vessel and be fixed in the float chamber of the nonferromagnetic material on the tested container and wherein the ferromagnetism material float, be positioned at the outer magnetic unitor of float chamber;
It is characterized in that:
Float chamber also has outward two guide rails and is positioned at the collets of its lower end, and described two guide rails have electric conductivity, and vertical fixing is on described collets and equidistant with float chamber; And have at least on the guide rail behind the insulation course of covering and be wound with resistance wire;
Described magnetic unitor comprises insulated case, magnet steel and horizontally disposed metal shaft between two guide rails; Described magnet steel is positioned at the side of insulated case near float, and its magnetic pole is over against float; Described insulated case respectively with the close biside plate of two guide rails on porose, the end of described metal shaft cooperates with two holes and exposes that insulated case is outer to fit by magnetic force and described guide rail;
For guarantee the magnetic unitor steadily, on the described magnetic unitor metal shaft under the insulation axle of an and length parallel with metal shaft greater than two guide rail spacings is housed, this insulation spool is also adsorbed with described guide rail by magnetic force mutually.
For further steady, described metal shaft and insulation axle are gone up the wheel that has groove on the ring fixedly are housed.
Described guide rail is between described metal shaft and float chamber;
Under the state of described magnetic unitor lifting with the liquid level lifting, measure by guide rail and go up the resistance wire that twines and loop that metal shaft is constituted in the variation of resistance value can obtain level value.
The principle of work of this float type level gauge is achieved in that
Float is along with the liquid level lifting, and float that ferrimagnet is made and the magnet steel on the magnetic unitor form magnetic coupling force and drive the lifting of magnetic unitor.For realizing the signal is far passed, twine resistance wire again after covering insulation course on described two guide rails or the guide rail wherein, the liquid level lifting makes the magnetic unitor do upper and lower elevating movement, thereby whole resistance in circuit value is changed, and the resistance value of measuring two ends can realize the teletransmission of signal.If consider the influence of temperature variation, can add a temperature compensation lead or thermo-compensator and compensate to the resistance wire resistance.
In order to reduce the friction force that magnetic force bonding force or magnetic attraction cause, must reduce magnetic coupling force, promptly alleviate the weight of float, and reduce friction factor, it is characterized in that the float that described ferrimagnet is made is the spheroid of hollow, sliding friction is become rolling friction.
For high temperature resistant, outer resistant to elevated temperatures high-alloy steel of coating of the float that described ferrimagnet is made or described ferrimagnet are high-alloy steel.
In order to improve corrosion resistance, it is characterized in that the float that ferrimagnet is made coats corrosion-resistant coating outward.
Other designs comprise installs the bearing that is used to support metal shaft and insulation axle on the biside plate of magnetic unitor, have eye-catching mark to be equal to embodiment 1 on the insulated case.
Three of technical solution of the present invention is at the not too high occasion of some medium temperatures, that is temperature can not cause under the situation of magnet steel demagnetization:
Described float type level gauge, two difference of itself and aforementioned schemes is:
Replace the float of ferromagnetism material with the float of nonferromagnetic material, disc magnet steel A identical with the float internal diameter more than 1 is housed in the float of described nonferromagnetic material;
Magnet steel in the described magnetic unitor more than 1 is annular magnet steel B, the center of magnet steel B is porose, fix by the metal shaft in this hole and the described magnetic unitor, described magnet steel B is fixed on the centre of insulated case, the axis of magnet steel A and magnet steel B is parallel to each other and is parallel to ground, both magnetic poles lay respectively on its circular axis end face and both N, S utmost point opposed, and the middle vertical plane of the axis of magnet steel A, B is positioned at same plane.
In order to reduce the friction force that magnetic coupling force or magnetic attraction cause, must reduce magnetic coupling force, promptly alleviate the weight of float, and reduce friction factor, it is characterized in that float that described nonferromugnetic material is made is in the spheroid of hollow a slice or several circular magnet steel identical with the float internal diameter to be housed.
Four of technical solution of the present invention is the occasions that are applicable to high pressure low density:
Different with three of aforementioned schemes two and schemes be in, occasion in high pressure low density, gravity for displacer, give lifting force that makes progress of float, on the basis of scheme two and scheme three, set up fixed pulley and balance bob and connecting rope or connected band, described fixed pulley is fixed in top, the float chamber outside, and connecting rope or connection band are walked around fixed pulley, and two ends connect described balance bob and magnetic unitor respectively.
Under the conventional occasion, the weight of balance bob greater than the weight of magnetic unitor so that float and the magnetic unitor pulling force between forming up and down all the time avoids forming between float and the magnetic unitor dead band, generation hysteresis in the middle of magnet steel.The size of this pulling force is with greater than outer mechanical friction power of float chamber and poor less than the maximum up and down bonding force of float and magnetic unitor and mechanical friction power.Required pulling force and mechanical friction power sum when the gravity of float separates greater than the difference of the gravity of balance bob and the gravity of magnetic unitor and less than float and the coupling of magnetic unitor, and leave safety allowance.When descending, need overcome mechanical friction power, mechanical friction force is also arranged during the float motion because of the magnetic unitor.Deducting float as: the weight of float immerses the weight that weight that the suffered buoyancy of liquid one half equals balance bob deducts the magnetic unitor and deducts mechanical friction power again.At this moment, the magnetic coupling force gravity that must deduct the magnetic unitor greater than the gravity of balance bob is added mechanical friction power.
The principle of work of this liquid level gauge is achieved in that
The float that is positioned at float chamber is coupled with the magnetic unitor all the time, and during the liquid level lifting, this equilibrium of forces is broken, and float makes the lifting of magnetic unitor with the liquid level lifting, and has realized the signal is far passed by aforementioned the same teletransmission structural design.
The gravity that the gravity that the gravity of balance bob deducts the magnetic unitor greater than the gravity of the gravity of magnetic unitor and balance bob equals float deducts float and immerses the suffered buoyancy of the about half of fluid to be measured.Both realize equilibrium of forces by magnetic coupling force, that is: balance bob spurs the magnetic unitor and gives lifting force that makes progress of float by the magnetic unitor.
Two magnetic coupling parts are always sought the shortest distance and are coupled, and therefore, float of the present invention and magnetic unitor always seek that nearest distance is upper and lower to be synchronized with the movement.That is: the two can not depart under the normal condition.
In above-mentioned whole technical solutions, for steadily, do not produce inclination, the center of gravity of described magnetic unitor is in the bottom.
For reaching the purpose of dustproof and anti-explosion, the signal is far passed part all can be contained in the casing of a non-magnetic material.
The high-temperature field is fashionable, can add thermofin between float chamber and magnetic unitor, and the magnetic unitor is preferably the round shelly concentric with axle.
Be with copper sheathing on magnetic axis or the metal shaft, with the good conductive of assurance with guide rail.
Compared with prior art, the invention has the beneficial effects as follows conspicuously, float type level gauge disclosed in this invention has following characteristics:
1. signal is continuous, has overcome the problem and the baroque problem that adopt the discontinuous and poor reliability of a large amount of magnetosensitives or light activated element signal.
2. guide rail plays dual parts the spacing and signal transducer of guide rail simultaneously, reduce one of the fixed mount and the dustproof and anti-explosion case thereof of teletransmission parts, thereby simplified the structure greatly, reduced manufacturing cost, for country has saved great deal of raw materials, reduce the purchase cost of enterprise.
3. designed structure comprises between two magnetic coupler elements and is rolling friction, and parts significantly reduce, and makes friction factor very low, and friction factor is reduced to below 0.003 by traditional 0.15.Reduce hysteresis thus, improved measuring accuracy.
4. significantly reducing of components and parts improved reliability of products, and product assembling and debugging and demarcation are more prone to.
5. the structure of sensor and secondary instrument are all very simple, easy to manufacture.
6. float is spherical, is difficult for being stuck.
7. simple in structure, safeguard easily, use reliable.
8. magnetic axis or metal shaft and guide rail are fitted closely, can not form loose contact, have guaranteed reliable use, have removed brush from, do not form wearing and tearing, do not increase friction force.
9. after designed magnetic unitor adopted magnetic axis, the existing magnetic bassinet structure of texture ratio was simply many, saves four little magnetic wheels, has alleviated the load of float.
Description of drawings
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the structural representation of magnetic unitor;
Fig. 3 is the structural representation of embodiment 2;
Fig. 4 is the right view of Fig. 3;
Fig. 5 is the structural representation of embodiment 3;
Fig. 6 is the right view of Fig. 5;
Fig. 7 is the structural representation of embodiment 4;
Fig. 8 is the right view of Fig. 7;
The structural representation of Fig. 9 embodiment 5;
Figure 10 is the right view of Fig. 9.
Embodiment
Embodiment 1: the non-pressure vessel float type level gauge
As Fig. 1, the float type level gauge shown in 2 comprises float 1, place connecting rope or connection on the pulley 3 to be with 2, its two ends link with float 1 and magnetic unitor 5 respectively, and perpendicular to the guide rail 4 that ground is fixed on two magnetic conductions on the insulation fixed block 6 and conducts electricity, pulley 3 is fixed on the top of container 9.
Described two guide rails 4 are fixing by the collets under it 6, have at least one upward to twine resistance wire behind the covering insulation course;
Insulated case 5-4 can on eye-catching mark is arranged, as red-label, so that rough observation.
In order to realize the signal is far passed, when the magnetic axis 5-2 on the magnetic unitor 5 changes with liquid level change, resistance on the loop that is made of resistance wire on the guide rail 4 and magnetic axis 5-2 produces corresponding the variation, is equivalent to a slide rheostat, and the variable quantity of measuring this resistance value can be known level value.The instrument of corresponding measuring resistance is many, does not give unnecessary details one by one at this.
In order to reduce the influence of temperature, can add a temperature compensation lead or compensating resistance and compensate the resistance wire change in resistance.
Good in order to guarantee conduction, stud with copper sheathing on the magnetic axis 5-2.
Embodiment 2: the container float type level gauge that pressure is arranged
As Fig. 3, float type level gauge shown in 4, comprise the float chamber 10 that is communicated with and is fixed on the nonferromugnetic material making on the tested container 9 with tested container 9, the float 1 that ferrimagnet in the float chamber 10 is made, it is characterized in that also comprising two guide rails 4 outside the float chamber 10, collets 6 under the guide rail 4 and magnetic unitor 5, described magnetic unitor 5 comprise insulated case 5-3, magnet steel 5-4 and horizontally disposed metal shaft 5-5 between two guide rails 4; Described magnet steel 5-4 is positioned at the side of insulated case 5-3 near float 1, and its magnetic pole is over against float 1; Similar to embodiment 1, be separately installed with bearing 5-1 in the hole on the biside plate of insulated case 5-3; By described bearing 5-1 supporting, an end is positioned at insulated case 5-3 inside to metal shaft 5-5 respectively, and the other end exposes outside the insulated case 5-3; Because the magnetic attraction of magnet steel 5-4 is fitted well the metal shaft 5-5 of magnetic conduction and guide rail 4, so adopt metal shaft 5-5 to replace magnetic axis 5-2 here.
In order to guarantee the steady of magnetic unitor 5, on the described magnetic unitor 5 metal shaft 5-5 under the insulation axle 5-5 ' of an and length parallel with metal shaft 5-5 greater than two guide rail spacings is housed, this insulation axle 5-5 ' also adsorbs with described guide rail 4 mutually by magnetic force, and bearing 5-1 ' is used for supporting insulation axle 5-5 '.
For further steady, described metal shaft 5-5 and insulation axle 5-5 ' go up the wheel that radial outside has groove fixedly are housed.
Two guide rails 4 and float chamber are equidistant and between float chamber 10 and metal shaft 5-5.For realizing the signal is far passed, have at least on the guide rail 4 and twine resistance wire again behind the covering insulation course; When float 1 during along with the liquid level lifting, float 1 that ferrimagnet is made and the magnet steel 5-4 on the magnetic unitor 5 form magnetic adhesion and drive 5 liftings of magnetic unitor, thereby whole resistance in circuit value is changed, and the resistance value of measuring two ends can realize the teletransmission of signal.Consider the influence of temperature variation, can add a temperature compensation lead or thermo-compensator and compensate the resistance wire resistance.
The technical characterictic of other optimization is as there being eye-catching mark, as studding with copper sheathing etc. on red-label or the axle 5-5 all with embodiment 1 on the insulated case.Float adopts sphere in addition, to reduce friction force etc.
In addition, the high temperature resistant and corrosion resistance characteristic of consideration raising float 1 can coat resistant to elevated temperatures high-alloy steel layer outside the float 1 of described ferromagnetism material or float itself promptly adopts high-alloy steel; Perhaps in order to improve corrosion resistance, the described float 1 outer corrosion-resistant coating that coats.
For dustproof and anti-explosion, the signal is far passed part all can be contained in the casing of a non-magnetic material.
Two magnetic coupling parts are always sought the shortest distance and are coupled, and therefore, float of the present invention 1 always seeks with magnetic unitor 5 that nearest distance is upper and lower to be synchronized with the movement.That is: the two can not depart under the normal condition.
Embodiment 3: the magnetic float type level gauge that is applicable to the pressure vessel that medium temperature is not too high
In the not too high occasion of medium temperature, that is can not cause magnet steel when demagnetization, in order to improve magnetic attraction, employed a kind of magnetic float type level gauge, as Fig. 5, shown in 6, different with 2 of embodiment be in: its float 1 usefulness nonferromugnetic material is made, the above circular magnet steel A11 identical with the float internal diameter of a slice is housed in the float, 1 above annular magnet steel B5-6 is housed between two guide rails 4 on the magnetic unitor 5, magnet steel B5-6 is that annular magnetic is firm, and the center of magnet steel B5-6 is porose, fixes by this hole and metal shaft.Described magnet steel B5-6 is fixed on the centre in the insulated case 5-3, the magnetic pole of magnet steel A11 and magnet steel B5-6 lays respectively on its circular end surface and both N, S utmost point opposed, the axis of the two is parallel to each other and be parallel to ground, and the middle vertical plane of the axis of the two is positioned at same plane.
Same, for realizing the signal is far passed, twine resistance wire again after covering insulation course on described two guide rails or the guide rail wherein, during the liquid level lifting, magnetic coupling force between magnet steel A and the magnet steel B makes the magnetic unitor do elevating movement thereupon, thereby whole resistance in circuit value is changed, and the resistance value of measuring two ends can realize the teletransmission of signal.
Embodiment 4; Be applicable to the float type level gauge of high pressure low density occasion
Float type level gauge as shown in Figure 7 and Figure 8, weight for displacer, give lifting force that makes progress of float, be on the basis of embodiment 2, increased fixed pulley 3 and balance bob 12 and connecting rope or connection with 2 design: described fixed pulley 3 is fixed in top, float chamber 10 outsides, connecting rope or connection are with 2 to walk around fixed pulley 3, and two ends connect described balance bob 12 and magnetic unitor 5 respectively.
Embodiment 5: be applicable to the high pressure low density occasion
As Fig. 9 and float type level gauge shown in Figure 10, same, weight for displacer, give lifting force that makes progress of float, on the basis of embodiment 3, increased fixed pulley 3 and balance bob 12 and connecting rope or connection with 2 design: described fixed pulley 3 is fixed in top, float chamber 10 outsides, and connecting rope or connection are with 2 to walk around fixed pulley 3, and two ends connect described balance bob 12 and magnetic unitor 5 respectively.
Technical scheme of the present invention can not total number, and the inventor did equipment control for many years, did excess pressure container and pipe design, studied multiple liquid level gauge.Selecting such scheme is the multiple design of contrast, considering energy-conservation, cost, reliability, maintenanceability, suitable process conditions, the market demand, processibility and be intended to solve on all factors basis such as existing technical barrier, and to float and float chamber carry out that intensity is calculated and material is designed after selecting preferred version: through testing in a large number, liquid level gauge disclosed in this invention is very sensitive, has stopped hysteresis phenomenon.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (11)
1. a float type level gauge comprises float, connecting rope or connects band, fixed pulley and magnetic unitor; Fixed pulley is fixed on the container; Connecting rope or connection band are walked around fixed pulley, and two ends connect float and magnetic unitor respectively;
It is characterized in that:
Also comprise two guide rails and the collets that are positioned at its lower end, described guide rail has magnetic conduction electric conductivity, and vertical fixing is on described collets; And have at least on the guide rail behind the insulation course of covering and be wound with resistance wire;
Described magnetic unitor comprises insulated case, horizontally disposed magnetic axis between two guide rails; Described insulated case respectively with the close biside plate of two guide rails on porose, the end of described magnetic axis cooperates with two holes and exposes respectively that insulated case is outer adsorbs mutually by magnetic force and described guide rail;
Under the state of described magnetic unitor lifting with the liquid level lifting, the variation of measuring by resistance value in the loop that resistance wire and magnetic axis constituted of guide rail and upward winding thereof can obtain level value.
2. float type level gauge, comprise be communicated with tested pressure vessel and be fixed in the float chamber of the nonferromagnetic material on the tested container and wherein the ferromagnetism material float, be positioned at the outer magnetic unitor of float chamber;
It is characterized in that:
Float chamber also has outward two guide rails and is positioned at the collets of its lower end, and described two guide rails have electric conductivity, and vertical fixing is on described collets and equidistant with float chamber; And have at least on the guide rail behind the insulation course of covering and be wound with resistance wire;
Described magnetic unitor comprises insulated case, magnet steel and horizontally disposed metal shaft between two guide rails; Described magnet steel is positioned at the side of insulated case near float, and its magnetic pole is over against float; Described insulated case respectively with the close biside plate of two guide rails on porose, the end of described metal shaft cooperates with two holes and exposes that insulated case is outer to fit by magnetic force and described guide rail;
Described guide rail is between described metal shaft and float chamber;
Under the state of described magnetic unitor lifting with the liquid level lifting, measure by guide rail and go up the resistance wire that twines and loop that metal shaft is constituted in the variation of resistance value can obtain level value.
3. float type level gauge according to claim 2 is characterized in that:
Replace the float of ferromagnetism material with the float of nonferromagnetic material, disc magnet steel A identical with the float internal diameter more than 1 is housed in the float of described nonferromagnetic material;
Magnet steel in the described magnetic unitor more than 1 is annular magnet steel B, and the center of magnet steel B is porose, fixes by the metal shaft in this hole and the described magnetic unitor, and described magnet steel B is fixed on the centre of insulated case; The axis of magnet steel A and magnet steel B is parallel to each other and is parallel to ground, and both magnetic poles lay respectively on its circular axis end face and both N, S utmost point opposed, and the middle vertical plane of the axis of magnet steel A, B is positioned at same plane.
4. float type level gauge according to claim 2 is characterized in that:
Also comprise fixed pulley and balance bob and connecting rope or connect band, described fixed pulley is fixed in top, the float chamber outside, and connecting rope or connection band are walked around fixed pulley, and two ends connect described balance bob and magnetic unitor respectively.
5. float type level gauge according to claim 3 is characterized in that:
Also comprise fixed pulley and balance bob, described fixed pulley is fixed in top, the float chamber outside, and connecting rope or connection band are walked around fixed pulley, and two ends connect described balance bob and magnetic unitor respectively.
6. according to the arbitrary described float type level gauge of claim 1～5, it is characterized in that:
Bearing is installed respectively in the hole on the biside plate of described insulated case, and described magnetic axis or metal shaft are respectively by described bearing supporting.
7. according to the arbitrary described float type level gauge of claim 2～5, it is characterized in that:
The center of gravity of described magnetic unitor is in the bottom.
8. according to the arbitrary described float type level gauge of claim 1～5, it is characterized in that:
Described float is spherical.
9. according to claim 2 or 4 arbitrary described float type level gauges, it is characterized in that:
Outer resistant to elevated temperatures high-alloy steel layer of coating of the float of described ferromagnetism material or described ferromagnetism material are high-alloy steel.
10. according to claim 2 or 4 arbitrary described float type level gauges, it is characterized in that:
On the described magnetic unitor metal shaft under the insulation axle of an and length parallel with metal shaft greater than two guide rail spacings is housed.
11. float type level gauge according to claim 10 is characterized in that:
Bearing is installed respectively in the hole on the biside plate of described insulated case, and described metal shaft and insulation axle are by described bearing supporting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102196839A CN101706310B (en) | 2009-11-04 | 2009-11-04 | Continuous remote transmission float type level gauge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102196839A CN101706310B (en) | 2009-11-04 | 2009-11-04 | Continuous remote transmission float type level gauge |
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| CN101706310A CN101706310A (en) | 2010-05-12 |
| CN101706310B true CN101706310B (en) | 2011-06-22 |
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| CN2009102196839A Expired - Fee Related CN101706310B (en) | 2009-11-04 | 2009-11-04 | Continuous remote transmission float type level gauge |
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| US10788354B2 (en) * | 2015-11-18 | 2020-09-29 | Dalian Jiaxin Electromechanical Instrument Co. Ltd. | Ball float type liquidometer with vernier display |
| CN113089559A (en) * | 2021-04-12 | 2021-07-09 | 廖聪钱 | Hospital cleans care apparatus with road surface |
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