CN201532231U - Float type liquid level gauge used for high temperature high pressure or low density medium - Google Patents
Float type liquid level gauge used for high temperature high pressure or low density medium Download PDFInfo
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- CN201532231U CN201532231U CN2009202478544U CN200920247854U CN201532231U CN 201532231 U CN201532231 U CN 201532231U CN 2009202478544 U CN2009202478544 U CN 2009202478544U CN 200920247854 U CN200920247854 U CN 200920247854U CN 201532231 U CN201532231 U CN 201532231U
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Abstract
The utility model relates to a float type liquid level gauge used for high temperature high pressure or low density medium, which comprises a float chamber, a float and a scale; and is characterized in that: the float is a hollow ball; the liquid level gauge also comprises a guide rail and a magnetic coupling device; a magnetic steel or a circular sheet shaped magnetic steel is mounted in the magnetic coupling device in magnetic attraction with a magnetic material ball in the float of non ferromagnetic material, or with the circle sheet shaped magnetic steel in the float of non ferromagnetic material; a metal shaft is spanned between the sidewalls of the magnetic coupling device with both ends extended out from the sidewalls, attached tightly to the guide rail by magnetic force, while capable of moving up and down driven by the magnetic force; and loop resistance value variation can be measured by winding resistance wires on the guide rail to realize continuous remote signal transmission. The liquid level gauge of the utility model solves the problem of liquid level measurement in high temperature high pressure or high pressure low density medium; achieves the advantages of high measurement precision, simple structure, convenient using and low manufacturing and maintenance cost; and can be applied widely.
Description
Technical field
The utility model relates to the level gauging field, particularly is used for the float-type or the magnetic float type level gauge of High Temperature High Pressure or high pressure low density medium.
Background technology
Liquid level gauge is an application scenario instrument extremely widely, and existing level gauging instrument is of a great variety, multifarious.Be severe corrosive or pressure height and the low occasion of Media density is done following analysis now at high temperature and high pressure containers, medium:
When the applications float type level gauge of high pressure or high pressure low density, because pressure height or pressure height and Media density are low, the manufacturing of its float is very difficult, for the High Temperature High Pressure occasion manufacturing difficulty more of float then: because metal material at high temperature intensity reduce, then the wall thickness of float needs to increase thereupon, when pressure is simultaneously high, the wall thickness of float further increases, cause the weight of float to increase, the sensitivity of float level meter is reduced even can not use, improve sensitivity if increase the float diameter, the corresponding thereupon increase of its wall thickness, and the corresponding increase of the diameter that makes float chamber with wall thickness, thus make the magnetic coupling part owing to the reason of the increase of float wall thickness and float chamber wall thickness causes the increase of magnetic coupling part operating distance to weaken the acting force of magnetic coupling part, even can not use.Guarantee the acting force of magnetic coupling part, its way is that the float diameter is as far as possible little, the corresponding little wall thickness that reduces both of float chamber diameter, with this coupling that makes the magnetic coupling part in effective spacing.Thus, the sensitivity of float is extremely low, and especially during low-density medium, it is very long that float and float chamber all need be made, even can not use because the ratio of float is great.
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.2, indicate on the spot unintelligible.Though 3 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 utility model people only considers that the ball float manufacturing is simple, add at horizontal line or equatorial zone and inlay ferrimagnet, and mention the sliding friction scale removal, as seen this utility model people does not consider the influence of float shape to friction force.As described in ZL200410015416.7, this liquid level gauge has solved the application of high-pressure boiler preferably, but its 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 has 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.Float and float chamber are sliding friction, and friction force is big, show to lag behind, and error is big.On-the-spot indication and teletransmission two structural members or fixing skeleton make complex structure.Remote transfer signal is discontinuous.
In order to solve the above problems, people have found out some other solutions again.
As described in ZL97213710.6, it has adopted the magnetic coupling structure, and add the weight that counterweight is come displacer on the colour band outside float chamber, help improving its serviceability temperature and pressure limit, and make it satisfy the use of low-density occasion, but its weak point is: 1. when working pressure is high, dividing plate between the magnetic coupling part can be very thick, the axial end of this dividing plate is flat, it is equivalent to flange or blind plate on the pipeline, its thickness is by working pressure, temperature, diameter, the material decision of selecting for use, connecing standard design can be very thick, and this dividing plate can make magnetic coupling force too little of inoperative if thickness is very big, the decay of magnetic attraction is level how much with distance, if in the coupling of circular pipe outer radial, its wall thickness can be little a lot, and the capital of doing pressure vessel or pipe design calculates this wall thickness, look into pressure vessel or the pipe design handbook also can calculate, simultaneously visible consume material is many.2. the float chamber internals are many, and the corrosive medium occasion need all be selected corrosion-resistant material for use, has increased manufacturing cost.3. interior with steel wire and steel band, the medium fluctuation easily causes fracture, influences the life-span.4. the range estimation of night or dark occasion is difficult.5. on-the-spot indication and teletransmission two nested structures, complex structure influences reliability, the manufacturing cost height.6. upper and lower two pulleys tension colour band has increased friction force, influences sensitivity and measuring accuracy.7. the magnetic coupling part is sliding friction, and friction force is big, also influences precision.
ZL94235896.1 and for example, ZL200620035810.1, ZL92212184.2, ZL92235650.5 and ZL00211305.8 are described, and their advantage is: the weight that installs balance bob compensation float additional.What thus, the wall thickness of float allow to be made is thicker in to satisfy pressure when high or pressure height and the density needs when low.But their weak point is: 1. during High Temperature High Pressure, must make float chamber and balance bob chamber with expensive high-alloy steel, this is two chambers, has increased substantially cost of manufacture thus.2. the balance bob chamber can accumulate lime set, and is subjected to buoyancy effect measuring accuracy upwards when balance bob immerses lime set.3. float chamber and the balance bob that communicates with float chamber when medium is severe corrosive, must be selected resistant material for use or do preservative treatment more than indoor.4. under the high temperature occasion, must use high-temperature bearing.5. internals are many, and the reliability that influence is used is especially under the high temperature occasion.6. remote transfer signal is discontinuous.7. on-the-spot indication is difficult to observation when dark.8. more than the internals and in the float chamber of pressurized, so maintenance bothers the maintenance cost height.9. magnet steel is in float chamber, the demagnetization temperature limitation of magnet steel the serviceability temperature of this liquid level gauge.
As described in ZL200720117496.6, its advantage is: balance bob both balance float weight, make the wall thickness of float can satisfy the needs of High Temperature High Pressure or high pressure low density occasion.While, the error that balance bob is caused by buoyancy when having avoided balance bob to immerse measured medium improved measuring accuracy owing to the float chamber making is two double-lengths of other like product approximately.But its weak point is: 1. float and balance bob under same sensitivity or precision, must increase the diameter of float chamber in same float chamber.Under the same working pressure, increasing diameter is twice, and wall thickness approximately increases by 1 times.High thus low temperature situation is a lot of high-alloy steel of waste down, have increased cost of manufacture.2 float chamber length increase about one times, have further increased manufacturing cost, also cause bulky, take up room, the transportation also inconvenience.3. internals are many, and the metal material of Korrosionsmedium consumes expensive is many.4. if guarantee precision or sensitivity, the float diameter needs big, and the float chamber wall thickness increase that the float diameter brings greatly can cause the effect of tongue tube too weak until inoperative.5. on-the-spot indication is difficult to observation when dark.6. transportation is fragile.7. it is many to make the assembling difficulty.8. more than the internals and in the float chamber of pressurized, so maintenance bothers the maintenance cost height.
As application number is described in 93115704.8 utility application, and its advantage is the weight that has adopted the balance weight mechanism displacer, but also exists following deficiency: 1. the pipe internal pressure-resistant is much larger than external pressure, because pipe bears external pressure.Wall thickness is big during high pressure, waste material.2. two pipes put in container, and waste material is more, especially during high temperature.Many standard codes, serviceability temperature is during greater than 400 ℃, pressure restraining element or force-summing element do not allow with carbon steel (this all is suitable for preceding addressing aftermentioned), the pipeline at its balancing weight place need be used high-alloy steel at this moment, when causing the higher .3. of cost to be used for the corrosive medium occasion, need to use more resistant material, further increased cost.4. complex structure.5. dark place is difficult to observation.Between the magnetic coupling part for sliding friction causes friction force big, influence precision.
As described in ZL93213461.0, its advantage is simple in structure, and magnet steel has improved the temperature usable range in the outside of measured medium.Liquid in the vernier pipe of vernier place has reduced the load of float to the buoyancy of vernier, but has following deficiency: 1. float lacks extraneous lifting force upwards, bears the more float of high pressure so still be difficult to make.The scene be presented at dark occasion be difficult to observation.3. used material in vernier chamber and interior media and sliding friction cause friction factor big, influence precision.
As seen, the problem of prior art existing in various degree in the middle of following:
1, higher working pressure and High Temperature High Pressure or high pressure low-density occasion are difficult to use;
2, precious metal or resistant material use amount are big, (pulley, bearing, float chamber etc. need by the process conditions the selection of material, as high temperature, and the corrosion occasion), increased manufacturing cost;
3, balance bob or balance bob immerse testing liquid, influence measuring accuracy;
4, indicate on the spot unintelligible; Dark place is difficult to observation;
5, assembling and demarcation difficulty;
6, huge because of its structure, ressemble adjustment after the transportation, increased packing and transportation burden;
7, remote transfer signal is discontinuous;
8, 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 utility model 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 utility model people 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 utility model people 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 Ф=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 (Ф/2)
2* Δ L * γ=f,
ΔL＝4f÷(π×γ×Ф
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.
9, in addition, the liquid level gauge complex structure that has need overlap mechanisms with two as scene indication and teletransmission, other complicated mechanical mechanisms or the like, and size is huge, poor reliability, cost height; Simultaneously, cause on the one hand very long that float or float chamber need make, waste material, size is huge, and the packed and transported burden is heavy; On the other hand, cause 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.This just requires us to reduce the interior part of float chamber as much as possible.
10, in other many factory buildings and the building site perhaps the outer occasion of multicell can not be big illuminating lamp of a liquid level gauge installing, more impossiblely install illuminating lamp respectively for each liquid level gauge, this also is unfavorable for energy-conservation.Cause observation inconvenience thus.
What 11, float or float chamber need be made is very long, waste material, and size is huge, and the packed and transported burden is heavy.
The utility model content
In view of the above-mentioned all deficiencies of existing in prior technology, the utility model aims to provide and a kind ofly is used for High Temperature High Pressure or high pressure low density medium, and has remedied the float type level gauge of the defective of prior art to a great extent.
One of technical solution of the present utility model is achieved in that
A kind of float type level gauge comprises the float chamber of nonferromagnetic material, float, rule, magnetic unitor and two guide rails of nonferromagnetic material, and it is outer and equidistant with float chamber that described two guide rails are installed on described float chamber;
It is characterized in that:
Described float is the hollow ball-type, and the spheroid of a ferromagnetism material is equipped with in its inside;
Described magnetic unitor comprises magnet steel and metal shaft between two guide rails; Described magnet steel is positioned at the side of magnetic unitor near float, and its magnetic pole is over against float; Described metal shaft is vertical with guide rail, and crossbearer is on the both sides of magnetic unitor insulation tank wall, and two ends are exposed outside the described sidewall and by magnetic force and are adjacent to mutually with described guide rail; The length of metal shaft is greater than the spacing of described two guide rails;
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 radial outside has groove fixedly are housed.
Described guide rail is between described metal shaft and float chamber.
In order to reduce the wall thickness of float, the spheroid of described ferromagnetism material is the spheroid that external diameter equates with the float internal diameter of described nonferromagnetic material, to improve the bearing capacity of float.
In order to reduce friction force, must reduce magnetic coupling force, that is reduce the weight of float, the spheroid that it is characterized in that described ferromagnetism material is the spheroid of hollow.
Two of technical solution of the present utility model is achieved in that
Compare with aforementioned first kind of technical scheme, the described float type level gauge of the technical program is characterized in that:
Described float adopts the nonferromagnetic material, in disc magnet steel A identical with the float internal diameter more than 1 is housed;
Magnet steel in the described magnetic unitor is annular magnet steel B, and described magnet steel B is fixed on the centre of insulated case, and is coaxial with the metal shaft in the described magnetic unitor, be positioned at same plane with described magnet steel A and magnetic pole opposite.The parallel axes of the two and all be parallel to ground, the magnetic pole of the two points to axis separately, and the middle vertical plane of the two is in the same plane.
Technique scheme is at the not too high occasion of medium temperature, that is described medium temperature can not cause magnet steel when demagnetization, for improving the scheme that magnetic attraction is taked.
In such scheme, can increase following technical characterictic respectively in order further to improve its performance, further the optimisation technique scheme:
Such as occasion in high pressure low density, gravity for displacer, give lifting force that makes progress of float, on the basis of above-mentioned two schemes, set up fixed pulley and balance bob and connecting rope or connected band, described fixed pulley is fixed in top, the float chamber outside, 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 to deduct mechanical friction power greater than the outer mechanical friction power of float chamber and less than the bonding force of maximum magnetic flux up and down of float and magnetic unitor.The gravity of float deduct the gravity of magnetic unitor greater than the gravity of balance bob and when separating less than float and the coupling of magnetic unitor required pulling force deduct mechanical friction power, 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.
In order to reduce friction force and to reduce wear, described metal shaft and insulation axle are by the bearing supporting that is installed on the described magnetic unitor two side.
For preventing the deflection of magnetic unitor, the center of gravity of described magnetic unitor is heart line below therein.
For realizing the more clear indicating effect on the spot of realizing exactly, described metal shaft comprises contour two sections, is adjacent under magneticaction with two guide rails respectively, and described guide rail has electric conductivity, between described two sections metal shaft light source is installed, described light source connects two sections metal shaft respectively by lead; Described metal shaft near rule is offered through hole along its axis.
For ease of reading in wideer scope and estimating, described metal shaft through hole is equipped with magnifier or wide-angle lens towards rule near the rule end.
Be to realize the signal is far passed, described two guide rails or twine resistance wire again after wherein a guide rail covers insulation course, under the liquid level jacking condition, the variation of measuring by the resistance value in metal shaft and the formed galvanic circle of guide rail can obtain level value.During the level value of calculated resistance value correspondence, need deduct the interior resistance of light source, resistance value in this is little to can ignore the time if compare whole resistance in circuit proportion, directly with resistance value and liquid level is linear calculates.As the light source of 30W, when adopting the power voltage supply of 12V, the resistance of light source is tried to achieve with following formula: resistance R=voltage V
2/ power N, i.e. resistance R=12
2/ 30=144/30=4.44 Ω (ohm).If the consideration temperature variation to the influence of resistance wire resistance, can consider to be associated with the temperature compensation lead in described galvanic circle or thermo-compensator compensates.Because the upper and lower displacement of magnetic unitor makes whole loop resistance change, therefore preferably adopt constant current source power supply.
For further improving in the dark or the range estimation at night or reading, described rule adopts the light belt chi that has the light belt chi of scale or comprise different glow colors from top to bottom.
For ease of remote range estimation, the housing of described magnetic unitor is made with transparent material.
Described float type level gauge also comprises light-operated switch, is used to control the switch of the light source of light belt chi and/or noctilucence wheel.At this moment, whether light source is lighted and can be realized by the output power of control loop.Also can electromagnetic switch in parallel realize at the two ends of light source, power hour, switch connection, on the contrary disconnect.
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.
Compared with prior art, the beneficial effects of the utility model are conspicuous, and float type level gauge disclosed in the utility model has following characteristics:
1. solved the difficult problem of High Temperature High Pressure or high pressure low density medium occasion level gauging.
2. float is spherical, be difficult for being stuck, and no matter be that float or the magnetic unitor that is coupled by magnetic force with it are rolling friction, and friction pair is few, and structure is very simple, and parts are few, in light weight, thus make friction factor very low, and friction factor is reduced to below 0.003 by traditional 0.15.Reduce hysteresis thus, improved measuring accuracy and sensitivity.
3. the size of float and float chamber reduces greatly, saves starting material.During high temperature, the high-alloy steel of conserve expensive.
4. the balancing counterweight mechanism of float is outside float chamber, and is not high to gear train and material requirements thereof, as need not high cryogenic bearing, can lubricate., reduce cost such as corrosion occasion or high low temperature situation or High Temperature High Pressure occasion saving mass expensive metal material at some, safeguard that maintenance cost is low easily, structure is simpler.
5. it is spacing that guide rail plays guide rail simultaneously, and these the three kinds of effects of power lead and signal transducer simplify the structure greatly, have reduced manufacturing cost, for country has saved great deal of raw materials, reduces the purchase cost of enterprise.
6. the magnetic unitor had both played a part the on-the-spot indication of male part, played the light source effect of night illumination again, also did one of sensing element, achieved many things at one stroke, and saved parts, and the scene indication and the teletransmission of other like products need two parts usually.
7. various factories, rural area, storage and transport station the occasion dark or the observation requirements at night such as (storehouses) have been satisfied in the design of on-the-spot indication, especially dangerous situation such as high-pressure boiler.Because range estimation is convenient, directly perceived, accurate, thereby has improved security.Simultaneously, light source is near rule, and luminous energy is concentrated, and is beneficial to energy-conservation.
8. the design of continuous remote transmission has guaranteed that 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.
9. put the ball of a permeability magnetic material in the float, make simply, economize the fetal membrane tool.
10. the simplicity of design of magnetic unitor has alleviated the load of float.
11. metal shaft and guide rail adhesive are tight, can not form loose contact, have guaranteed reliable use, and have reduced wearing and tearing.
12. significantly reducing of parts improved reliability of products, and product assembling and debugging and on-site proving are more prone to.
Description of drawings
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the another kind of structural representation of embodiment 1;
Fig. 4 is the left view of Fig. 3;
Fig. 5 is the structural representation of embodiment 2;
Fig. 6 is the left view of Fig. 5;
Fig. 7 is the structural representation of embodiment 3;
Fig. 8 is the left view of Fig. 7;
Fig. 9 is the another kind of structural representation of embodiment 3;
Figure 10 is the left view of Fig. 9;
Figure 11 is the structural representation of embodiment 4;
Figure 12 is the left view of Figure 11.
Embodiment
As Fig. 1,2,3, the float type level gauge shown in 4 comprises float chamber 7, the float 1 of nonferromagnetic material, outer rule 6, magnetic unitor 5 and two guide rails 4 of float chamber of nonferromagnetic material; It is outer and equidistant with float chamber 7 that described two guide rails 4 are installed on described float chamber 7;
Described float 1 is the hollow ball-type, and the spheroid 100 of a ferromagnetism material is equipped with in its inside, as shown in Figure 1; Described spheroid 100 can be a hollow, and its external diameter is identical with the internal diameter of described float 1, as shown in Figure 3;
Described magnetic unitor 5 comprises magnet steel 5-1 and metal shaft 5-3 between two guide rails 4; Described magnet steel 5-1 is positioned at the side of magnetic unitor 5 near float 1, and its magnetic pole is over against float 1; Described metal shaft 5-3 and guide rail 4 vertical crossbearers are on the two side of magnetic unitor 5, and two ends are exposed outside the described sidewall and by magnetic force and are adjacent to mutually with described guide rail 4; The length of metal shaft 5-3 is greater than the spacing of described two guide rails 4;
In order to guarantee the steady of magnetic unitor 5, on the described magnetic unitor 5 metal shaft 5-3 under the insulation axle 5-2 ' of an and length parallel with metal shaft 5-3 greater than two guide rail spacings is housed, this insulation axle 5-2 ' also adsorbs with described guide rail mutually by magnetic force, and bearing 5-3 ' is used for supporting insulation axle 52 '.
For further steady, described metal shaft 5-3 and insulation axle 5-2 ' go up the wheel that radial outside has groove fixedly are housed.
Described guide rail 4 is between described metal shaft 5-3 and float chamber 7.
Its principle of work is as follows:
As Fig. 5, the float type level gauge shown in 6 comprises the float chamber 7 of nonferromagnetic material, float 1, magnetic unitor 5 and two guide rails 4 of nonferromagnetic material; It is outer and equidistant with float chamber 7 that described two guide rails 4 are installed on described float chamber 7;
Described float 1 is the hollow ball-type, and disc magnet steel A10 identical with the float internal diameter more than 1 is housed in it;
Described magnetic unitor 5 comprises annular magnet steel B5-5 and metal shaft 5-3 between two guide rails 4; Described magnet steel B5-5 is fixed on the centre of insulated case 5-4, coaxial with the metal shaft 5-3 in the described magnetic unitor 5, the axis of magnet steel A10 and magnet steel B5-5 is parallel to each other and is parallel to ground, both magnetic poles lay respectively on its circular end surface and both N, S utmost point opposed, the middle vertical plane of the axis of magnet steel A, B is positioned at same plane; Described metal shaft 5-3 and guide rail 4 vertical crossbearers are on the two side of magnetic unitor 5, and two ends are exposed outside the described sidewall and by magnetic force and are adjacent to mutually with described guide rail 4; The length of metal shaft 5-3 is greater than the spacing of described two guide rails 4;
Described guide rail 4 is between described metal shaft 5-3 and float chamber 7.
This programme is applicable to that some medium temperatures are not too high, that is can not cause the occasion of magnet steel demagnetization.
Embodiment 3
As Fig. 7,8 and Fig. 9,10 shown in float type level gauge, they are different with 1 of embodiment be in, pulley 3 is set up in its float chamber 1 outer top, connecting rope or connection connect magnetic unitor 5 respectively with 2 two ends and 11, two guide rails 4 of balance bob are with between 2 at connecting rope or connection.
During the liquid level lifting, this equilibrium of forces is broken, and magnetic unitor 5 and balance bob 11 are along with upper and lower motion.Axle on the magnetic unitor 5 is along guide rail 4 upper and lower moving.
As Figure 11, the float type level gauge shown in 12, they are different with 2 of embodiment be in: pulley 3 is set up in the top outside the float chamber 1, and connecting rope or connection connect magnetic unitor 5 respectively with 2 two ends and 11, two guide rails 4 of balance bob are with between 2 at connecting rope or connection.
During the liquid level lifting, this equilibrium of forces is broken, and magnetic unitor 5 and balance bob 11 are along with upper and lower motion.Axle on the magnetic unitor 5 is along guide rail 4 upper and lower moving.
In the such scheme, also can increase following technical characterictic respectively, obtain better technique effect, comprise:
The corresponding rule 6 of the mark of giving instruction on the magnetic unitor 5 promptly can read level value.
In order to reduce the influence of friction force, in ground cylindrical change spherical by axis normal the float 1 of traditional structure to measuring accuracy.Thereby make the motion of float 1 become rolling, significantly reduced friction factor, improved measuring accuracy by slip.Because float is the structure of hollow, reduced the weight of float thus again, therefore can reduce magnetic coupling force, this has just further reduced friction force.
In order to reduce friction force and to reduce wear, described metal shaft 5-2 and insulation axle 5-2 ' are installed on bearing 5-2 and the 5-2 ' supporting on the described magnetic unitor two side.
For preventing 5 deflections of magnetic unitor, the center of gravity of described magnetic unitor 5 is heart line below therein.
For realizing the more clear indicating effect on the spot of realizing exactly, described metal shaft comprises contour two sections, is adjacent under magneticaction with two guide rails respectively, between described two sections metal shaft light source is installed, and described light source connects two sections metal shaft respectively by lead; Described metal shaft near rule is offered through hole along its axis.
For ease of reading in wideer scope and estimating, described metal shaft through hole is equipped with magnifier or wide-angle lens towards rule near the rule end.
Be to realize the signal is far passed, described two guide rails or twine resistance wire again after wherein a guide rail covers insulation course, under the liquid level jacking condition, the variation of measuring by the resistance value in metal shaft and the formed galvanic circle of guide rail can obtain level value.During the level value of calculated resistance value correspondence, need deduct the interior resistance of light source, resistance value in this is little to can ignore the time if compare whole resistance in circuit proportion, directly with resistance value and liquid level is linear calculates.If consider the influence of temperature variation, can consider series connection temperature compensation lead or thermo-compensator in described galvanic circle to the resistance wire resistance.
In order to be convenient to comparative observation more, rule can be made with having luminous light belt, is carved with scale on it.This helps the light belt chi more and shows with the magnetic unitor contrast of being with light source.
One more intuitively way be: form with the light belt chi segmentation of different colours with different colours mark or rule on the rule.As making up with red, yellow, green several color alignment.
This float type level gauge also comprises light-operated switch, is used to control the switch of light belt chi and light source, and at this moment, whether light source is lighted can be realized by the output power of control loop.Also can realize in two ends of light source electromagnetic switch in parallel, power hour, switch connection, on the contrary disconnect.
Any combination of the utility model such scheme is all in protection domain.
Utility model people 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 the material selection after the preferred version designed; Through experimental results demonstrate, float type level gauge disclosed in the utility model has solved the difficult problem of level gauging in High Temperature High Pressure or the high pressure low density medium, measuring accuracy height; And simple in structure, easy to use, manufacturing and maintenance cost are low, widely applicable.
The above; it only is the preferable embodiment of the utility model; 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 replacement or change according to the technical solution of the utility model and utility model design thereof, all should be encompassed within the protection domain of the present utility model.
Claims (13)
1. a float type level gauge comprises the float chamber of nonferromagnetic material, float, rule, magnetic unitor and two guide rails of nonferromagnetic material; It is outer and equidistant with float chamber that described two guide rails are installed on described float chamber;
It is characterized in that:
Described float is the hollow ball-type, and the spheroid of a ferromagnetism material is equipped with in its inside;
Described magnetic unitor comprises magnet steel and metal shaft between two guide rails; Described magnet steel is positioned at the side of magnetic unitor near float, and its magnetic pole is over against float; The vertical crossbearer with guide rail of described metal shaft is on the two side of magnetic unitor, and two ends are exposed outside the described sidewall and by magnetic force and are adjacent to mutually with described guide rail; The length of metal shaft is greater than the spacing of described two guide rails;
Described guide rail is between described metal shaft and float chamber.
2. float type level gauge according to claim 1 is characterized in that:
Also comprise fixed pulley and balance bell, 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 bell and magnetic unitor respectively.
3. a float type level gauge comprises the float chamber of nonferromagnetic material, float, magnetic unitor and two guide rails of nonferromagnetic material; It is outer and equidistant with float chamber that described two guide rails are installed on described float chamber;
It is characterized in that:
Described float is the hollow ball-type, and disc magnet steel A identical with the float internal diameter more than 1 is housed in it;
Described magnetic unitor comprises annular magnet steel B and metal shaft between two guide rails; Described magnet steel B is fixed on the centre of insulated case, coaxial with the metal shaft in the described magnetic unitor, 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 end surface and both N, S utmost point opposed, the middle vertical plane of the axis of magnet steel A, B is positioned at same plane; The vertical crossbearer with guide rail of described metal shaft is on the two side of the insulated case on the magnetic unitor, and two ends are exposed outside the described sidewall and by magnetic force and are adjacent to mutually with described guide rail; The length of metal shaft is greater than the spacing of described two guide rails;
Described guide rail is between described metal shaft and float chamber.
4. 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.
5. float type level gauge according to claim 1 and 2 is characterized in that:
The spheroid that the external diameter of the spheroid of described ferromagnetism material equates with the float internal diameter of described nonferromagnetic material.
6. float type level gauge according to claim 5 is characterized in that:
The spheroid of described ferromagnetism material is the spheroid of hollow.
7. according to the arbitrary described float type level gauge of claim 1～4, it is characterized in that:
Described metal shaft is by the bearing supporting that is installed on the described magnetic unitor two side.
8. according to the arbitrary described float type level gauge of claim 1～4, it is characterized in that:
The center of gravity of described magnetic unitor is heart line below therein.
9. according to the arbitrary described float type level gauge of claim 1～4, it is characterized in that:
Described guide rail is the electric conductivity material; Described metal shaft comprises contour two sections, is adjacent under magneticaction with two guide rails respectively, between described two sections metal shaft light source is installed, and described light source connects two sections metal shaft respectively by lead; Described metal shaft near rule is offered through hole along its axis.
10. according to the arbitrary described float type level gauge of claim 9, it is characterized in that:
The close rule end of described metal shaft through hole is equipped with magnifier or the wide-angle lens towards rule.
11., it is characterized in that according to the arbitrary described float type level gauge of claim 1～4:
Described two guide rails or wherein guide rail twine resistance wire again after covering insulation course, under the liquid level jacking condition, the variation of measuring by the resistance value in metal shaft and the formed galvanic circle of guide rail can obtain level value.
12., it is characterized in that according to the arbitrary described float type level gauge of claim 11:
Also be associated with temperature compensation lead or thermo-compensator in the described galvanic circle.
13., it is characterized in that according to claim 1 or 2 arbitrary described float or liquid level gauges:
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202478544U CN201532231U (en) | 2009-11-04 | 2009-11-04 | Float type liquid level gauge used for high temperature high pressure or low density medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202478544U CN201532231U (en) | 2009-11-04 | 2009-11-04 | Float type liquid level gauge used for high temperature high pressure or low density medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201532231U true CN201532231U (en) | 2010-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202478544U Expired - Lifetime CN201532231U (en) | 2009-11-04 | 2009-11-04 | Float type liquid level gauge used for high temperature high pressure or low density medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201532231U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726344B (en) * | 2009-11-04 | 2011-11-30 | 大连嘉信机电仪表有限公司 | Float type level gauge for high-temperature high-pressure or high-temperature low-density medium |
-
2009
- 2009-11-04 CN CN2009202478544U patent/CN201532231U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726344B (en) * | 2009-11-04 | 2011-11-30 | 大连嘉信机电仪表有限公司 | Float type level gauge for high-temperature high-pressure or high-temperature low-density medium |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100721 Effective date of abandoning: 20091104 |