CN2636207Y - Servo type level meter - Google Patents
Servo type level meter Download PDFInfo
- Publication number
- CN2636207Y CN2636207Y CN 03207192 CN03207192U CN2636207Y CN 2636207 Y CN2636207 Y CN 2636207Y CN 03207192 CN03207192 CN 03207192 CN 03207192 U CN03207192 U CN 03207192U CN 2636207 Y CN2636207 Y CN 2636207Y
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- CN
- China
- Prior art keywords
- steel band
- servo
- float
- liquid level
- level meter
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Level Indicators Using A Float (AREA)
Abstract
The utility model discloses a servo liquid level meter, which comprises a floater which is hung on a hanger. A position sign is provided on the hanger, which can be perceived by an opto-electronic acquisition unit; another opto-electronic acquisition unit is arranged near the hanger. The original displacement information collected by the utility model can reflect the change of the liquid level directly, have higher measurement accuracy, can measure the liquid level and the interface, is simple in structure and easy to process and reduce the processing cost.
Description
Technical field
The utility model relates to level gauging instrument technical field, is specifically related to a kind of accurately servo-type level meter of measurement that can be used for.
Background technology
Liquid level gauge is widely used in the storing and transporting system of industries such as oil, chemical industry, food.Liquid level commonly used is in respect of radar level gauge, servo liquid meter, level gauge of steel band etc.
Radar level gauge is divided into metering level and common monitoring level, and metering level radar level gauge costs an arm and a leg and is difficult for being adopted by the user, and requires that in installation process waveguide pipe is arranged, and any burr can not be arranged in the waveguide pipe, otherwise the measuring-signal distortion, metering is inaccurate.Common monitoring level radar level gauge then can not be used in the occasion that requires accurate measuring liquid level because precision is low.
The servo liquid meter generally is made up of stepper motor, magnetic force coupling dish, wheel hub, steel wire, float, force transducer and corresponding electronic circuit.Its principle is that float, wheel hub and force transducer etc. are formed a dynamic balance rotation system, and float can move up and down under the drive of stepper motor, and the moment that float gravity produces reacts on the force transducer.Because the buoyancy difference of float under the different densities medium, also different to the reacting force that force transducer produces, so,, can determine that the float position is in air, on liquid level (liquid level position) or interface (interface between liquid) by measuring the size of reacting force.The actual position of float is to obtain by the step number of measuring stepper motor.On the wheel hub of this liquid level gauge thread groove is arranged, steel wire enters in the thread groove and by its screw thread and positions.Stepper motor whenever makes a move, and float displacement must be in full accord, otherwise will produce error.Therefore, the servo liquid meter is very high to the requirement on machining accuracy of wheel hub, stepper motor and corresponding gear train.This not only makes processing cost very high, and a lot of producer even be difficult to processing.
The float of steel band type liquid level gauge hangs on the steel band, and steel band drives by a sprocket wheel, and sprocket wheel send code-disc to be connected by shaft coupling, clutch and gear set and a change.This liquid level gauge send change value of sending of code-disc as the original displacement information of gathering with change, be used for calculating liquid level by related circuit.Because its gear train is more, this liquid level gauge failure rate height and precision are very low, are eliminated gradually.
Analyzing the reason that the problem of these existing liquid level gauges exists, is that the original displacement information that calculates being used to of being that it gathers liquid level all is taken from intermediate structure, can only reflect the variation of liquid level indirectly, and can not directly reflect the variation of liquid level.
Summary of the invention
Technical problem to be solved in the utility model is that a kind of servo-type level meter that can directly reflect liquid level change is provided.
For solving above-mentioned technical problem underlying, the utility model provides a kind of new servo-type level meter, and it comprises a float, and this float hangs on a suspender, this suspender is provided with can be by the tick lables of photoelectricity collector perception, and contiguous this suspender also is provided with a photoelectricity collector.
Wherein, described suspender can be a steel band, and this steel coil strip is around in a wheel hub, and described tick lables can be by certain regularly arranged perforation.
Wherein, described photoelectricity collector is an optoelectronic switch, and it comprises a light-emitting component and a photo-sensitive cell, lays respectively at the both sides of described steel band, and the perforation on the described steel band can be between described light-emitting component and photo-sensitive cell.
Wherein, described perforation vertically equidistantly is arranged on the steel band.
Adopt such scheme, the utlity model has following beneficial effect:
One, because have on the suspender of this servo-type level meter can be by the tick lables of photoelectricity collector perception, can be by the photoelectricity collector from reading original displacement information and be used to calculate liquid level with this suspender that float directly links to each other.So the original displacement information of the utility model collection can directly reflect the variation of liquid level, has higher measuring accuracy, can exact filling level and interface.
Two, because original displacement information directly reflects the variation of liquid level, on level gauging, there are not cumulative errors, so the machining precision of wheel hub, stepper motor and corresponding gear train etc. does not influence the level gauging precision, therefore, the requirement on machining accuracy of this servo-type level meter can correspondingly reduce, be easy to processing, thereby cut down finished cost.
Three, the steel coil strip of this servo-type level meter is around on the wheel hub, and does not need complicated gear set structure, so this liquid level gauge is simple in structure, has also correspondingly reduced processing cost.
Description of drawings
Below in conjunction with accompanying drawing, describe embodiment of the present utility model in detail.
Fig. 1 is the structural representation of a kind of embodiment of the utility model;
Fig. 2 be among Fig. 1 A to structural representation.
Piece number explanation among the figure:
The 1-float; The 2-steel band; The 3-perforation; The 4-optoelectronic switch; The 5-wheel hub; 6-magnetic clutch discs; The 7-stepper motor; The 8-axle; The 9-support; The 10-leaf spring; 11-moves pole piece; The quiet pole piece of 12-; The 13-pull bar; The 14-backguy; The 15-light-emitting component; The 16-photo-sensitive cell.
Embodiment
Referring to Fig. 1, show a kind of embodiment of the present utility model.
This servo-type level meter comprises a wheel hub 5, one magnetic clutch discs 6, and a stepper motor 7, and wheel hub 5 is installed together with magnetic clutch discs 6, and stepper motor 7 is connected with magnetic clutch discs 6 by axle 8.
The hub end of this servo-type level meter is provided with the liquid level information collecting device, and the stepper motor end is provided with the equilibrant sensing apparatus.The utility model is the innovation and creation that the liquid level information collecting device of servo-type level meter is done.
First talk about the hub end of this servo-type level meter.Be wound with a steel band 2 on the wheel hub 5, steel band 2 is as suspender, and its lower end is connected with float 1.Longitudinally equidistantly be provided with row's perforation 3 on the steel band 2, steel band 2 next doors are provided with an optoelectronic switch 4, and it can perceive this perforation 3.This optoelectronic switch 4 comprises a light-emitting component 15 and a photo-sensitive cell 16, lays respectively at the both sides of described steel band 2, and upper and lower when mobile with float 1 when steel band 2, the perforation 3 on it can be just in time between light-emitting component 15 and photo-sensitive cell 16.This has the steel band 2 and the optoelectronic switch 4 common liquid level information collecting devices that constitute liquid level gauge described in the utility model of perforation 3.
The utility model in the specific implementation, wherein said steel band 2 can also be other any suspender that can connect float 1, has tick lables on it.
Described tick lables also can be that outside the perforation other is any can be by the structure of photoelectricity collector perception, as scale mark etc.
Described perforation 3 also can be to be arranged on the steel band in the Else Rule mode, the photoelectricity collector reads corresponding with it different perforation 3, represents that then float is positioned at the position of a certain height, like this, by the coded message of the perforation on the steel band 3, just can know the position of float.
Now, the stepper motor end of this servo-type level meter again.The right-hand member of stepper motor 7 has a pull bar 13, pull bar 13 the other end be connected with a leaf spring 10 by a backguy 13.The left end of leaf spring 10 is fixed in a support 9, and its right-hand member links to each other with a Linear displacement transducer.In the present embodiment, what described Linear displacement transducer specifically adopted is a kind of condenser type Linear displacement transducer, and it has a moving pole piece 11 and a quiet pole piece 12.Wherein moving pole piece 11 is fixed in the right-hand member of leaf spring 10.Because float 1, steel band 2, wheel hub 5, magnetic clutch discs 6, axle 8, stepper motor 7, pull bar 13, backguy 14 and leaf spring 10 constitute a dynamic balance system, when so float 1 relative liquid level distance changes, its suffered buoyancy also changes, the variation of this buoyancy will be reflected to leaf spring 10, and then the distance between pole piece 11 and the quiet pole piece 12 is changed, thereby this condenser type Linear displacement transducer can perceive this variation.Because the variation and the float 1 suffered buoyancy of the electric signal of the condenser type Linear displacement transducer perception that is caused by variable in distance between the dynamic and static pole piece 11,12 have fixing corresponding relation, so also can accurately measure the suffered buoyancy of float by this device.
Describe the course of work of this liquid level gauge below in detail.
Stepper motor 7 rotates, and drives 6 rotations of magnetic clutch discs by axle 8, and magnetic clutch discs 6 and then drive wheel hub 5 rotate.When wheel hub 5 rotated, steel band 2 was on wheel hub 5 or reel or unclamp, thereby drove float 1 upper and lower motion.At this moment, the perforation 3 on the steel band 2 will be moved between the light-emitting component 15 of optoelectronic switch and photo-sensitive cell 16, thereby optoelectronic switch 4 will may be read into the position at float 1 place.Float 1 is subjected to the acting in conjunction of gravity and buoyancy, will produce a moment to described dynamic balance system, and this moment will act on the leaf spring 10.According to Archimedes's the law of buoyancy, the moment difference that float 1 produces in air and in the different densities liquid time, also just different to the acting force of leaf spring 10, the distance meeting between moving pole piece 11 and the quiet pole piece 12 changes with the different of size of the suffered buoyancy of float.To reach the effect of ergometry by the variation of measuring this distance.Like this,, in other words,, will know that float 1 is to be arranged in air according to the variation of the electric signal of Linear displacement transducer perception by measurement result to this equilibrant, on the liquid level, or on the interface between liquid.At this moment, the position of the displacement sign by described on-off element 4 perception can obtain accurate liquid level or interface, thereby realize the purpose at accurate measuring liquid level and interface.
Claims (4)
1. a servo-type level meter comprises a float, and this float hangs on a suspender, it is characterized in that, this suspender is provided with can be by the tick lables of photoelectricity collector perception, and contiguous this suspender also is provided with a photoelectricity collector.
2, servo-type level meter according to claim 1 is characterized in that, described suspender is a steel band, and this steel band is wound in a wheel hub, and described tick lables is for pressing certain regularly arranged perforation.
3, servo-type level meter according to claim 2, it is characterized in that described photoelectricity collector is an optoelectronic switch, it comprises a light-emitting component and a photo-sensitive cell, lay respectively at the both sides of described steel band, the perforation on the described steel band can be between described light-emitting component and photo-sensitive cell.
4, servo-type level meter according to claim 2 is characterized in that, described perforation vertically equidistantly is arranged on the steel band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03207192 CN2636207Y (en) | 2003-08-07 | 2003-08-07 | Servo type level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03207192 CN2636207Y (en) | 2003-08-07 | 2003-08-07 | Servo type level meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2636207Y true CN2636207Y (en) | 2004-08-25 |
Family
ID=34288328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03207192 Expired - Lifetime CN2636207Y (en) | 2003-08-07 | 2003-08-07 | Servo type level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2636207Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010015132A1 (en) * | 2008-08-06 | 2010-02-11 | Fan Mingjun | Servo liquid level meter |
| CN101566492B (en) * | 2009-06-03 | 2011-04-20 | 吴军保 | Liquid storage tank liquid-level meter |
| CN102914342A (en) * | 2012-09-20 | 2013-02-06 | 北京中矿艾可沃特科技有限公司 | Detection device for underground sump coal slime sediment deposition |
| CN103954531A (en) * | 2014-05-21 | 2014-07-30 | 范明军 | Device for driving density measurement part to move up and down |
| CN111256782A (en) * | 2020-02-14 | 2020-06-09 | 孙淑芳 | A measure servo level gauge for oil tank |
-
2003
- 2003-08-07 CN CN 03207192 patent/CN2636207Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010015132A1 (en) * | 2008-08-06 | 2010-02-11 | Fan Mingjun | Servo liquid level meter |
| CN101566492B (en) * | 2009-06-03 | 2011-04-20 | 吴军保 | Liquid storage tank liquid-level meter |
| CN102914342A (en) * | 2012-09-20 | 2013-02-06 | 北京中矿艾可沃特科技有限公司 | Detection device for underground sump coal slime sediment deposition |
| CN103954531A (en) * | 2014-05-21 | 2014-07-30 | 范明军 | Device for driving density measurement part to move up and down |
| CN111256782A (en) * | 2020-02-14 | 2020-06-09 | 孙淑芳 | A measure servo level gauge for oil tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130807 Granted publication date: 20040825 |