CN201279480Y - Steel-ball milling state detection system - Google Patents
Steel-ball milling state detection system Download PDFInfo
- Publication number
- CN201279480Y CN201279480Y CNU2008202002571U CN200820200257U CN201279480Y CN 201279480 Y CN201279480 Y CN 201279480Y CN U2008202002571 U CNU2008202002571 U CN U2008202002571U CN 200820200257 U CN200820200257 U CN 200820200257U CN 201279480 Y CN201279480 Y CN 201279480Y
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- steel ball
- ball mill
- signal modulator
- data
- detecting system
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Abstract
The utility model relates to a state detection system of a steel ball mill used in a steel ball coal mill system in a thermal power plant, comprising an acceleration sensor, a signal modulator, a data acquisition card, a power supply and a computer; wherein, the acceleration sensor is installed on the bearing seat of the steel ball mill, the signal modulator is connected with the acceleration sensor and receives signal from the acceleration sensor, the data acquisition card is connected with the signal modulator and acquires data from the signal modulator, the power supply provides power for the signal modulator and the data acquisition card, the computer is connected with the data acquisition card and conducts data sampling from data obtained by the data acquisition card and data processing and analysis. The state detection system of the steel ball mill can conduct real-time optimum steel ball proportioning test and optimum steel ball load test, thus substantially obtaining the goal of reducing unit consumption in coal milling.
Description
Technical field
The utility model relates to steel ball mill condition detecting system in the power power plant ball mill pulverizing system.
Background technology
Low speed coal mill is the powder manufacturing apparatus of domestic present more Thermal Power Station, and its advantage is working stability, reliable, and is strong to coal adaptability.Its shortcoming is that power consumption is bigger, and generally speaking, power consumption accounts for power plant self and produces about 2% of electric weight, and the unit consumption that therefore reduces low speed coal mill is the energy-conservation main target of power plant, is key problem in technology and make low speed coal mill be operated in optimum state.Make the steel ball mill really can reduce the unit power consumption of coal pulverizing key and be the deep powder process mechanism of understanding the steel ball mill.Two important variablees be respectively steel ball best proportioning and best useful loads of steel ball wherein.And because the loss of steel ball, the proportioning of steel ball changes always in the coal pulverizer, if can more accurately detect the proportioning situation of steel ball in the coal pulverizer, and in view of the above steel ball matching is adjusted, and can effectively reduce unit consumption.In addition, coal load quantity is detected, and optimum charge of balls is adjusted, can effectively reduce unit consumption again according to testing result.Therefore, it is real in necessary to make a kind of steel ball mill condition detecting system of steel ball matching and coal load quantity that can accurately detect in the steel ball mill.
Summary of the invention
The purpose of this utility model provides a kind of steel ball mill condition detecting system that can accurately detect steel ball matching and coal load quantity in the steel ball mill.
For achieving the above object, the utility model provides following technical scheme:
Steel ball mill condition detecting system,
It comprises
Acceleration transducer, it is installed on the bearing block of steel ball mill;
Signal modulator, it connects described acceleration transducer, and from described acceleration transducer received signal;
Data collecting card, it connects described signal modulator, and from described signal conditioner image data;
Power supply, it is described signal modulator and the power supply of described data collecting card;
Operating computer, it connects described data collecting card, and the data of obtaining from described data collecting card are sampled with the data processing, analyzed.
Above-mentioned steel ball mill condition detecting system can be real-time carry out best proportioning test of steel ball and the best useful load test of steel ball.Thereby the real purpose that realizes reducing unit power consumption of coal pulverizing.And the coal load quantity signal also is the important parameter of steel ball mill, can prevent full mill, improves security.By using above-mentioned steel ball mill condition detecting system can make steel ball total amount, steel ball matching and coal load quantity in the steel ball mill be in rational state all the time, thereby reach the purpose that reduces unit consumption.
Description of drawings
Fig. 1 is the structured flowchart of the utility model first embodiment;
Fig. 2 is the structured flowchart of the utility model second embodiment.
The utility model is described in further detail below in conjunction with drawings and Examples.
The specific embodiment
Embodiment one
Referring to Fig. 1, steel ball mill condition detecting system comprises acceleration transducer, signal modulator, usb data capture card, power supply and operating computer.Acceleration transducer is installed on the bearing block of steel ball mill.Signal modulator connects acceleration transducer, and from the acceleration transducer received signal.The described signal modulator of data acquisition card connection, and from described signal conditioner image data.Operating computer connects the usb data capture card, and operating computer is sampled to the data of obtaining from described data collecting card and data are handled, analyzed.Power supply is electrically connected with signal modulator and usb data capture card, and is they power supplies.
Above-mentioned signal modulator comprises electric current loop and the amplifier that connects by cable.
As operating computer, above-mentioned steel ball mill condition detecting system can be applied as portable, and different steel ball mills is carried out state-detection with notebook computer.
Embodiment two
Referring to Fig. 2, steel ball mill condition detecting system comprises 6 acceleration transducers, 6 signal modulators, PCL data collecting card, power supply, operating computer and a plurality of industrial Adam's modules.Each acceleration transducer is contained in respectively on the bearing block of different steel ball mills.Each signal modulator is corresponding to connect an acceleration transducer, and from the acceleration transducer received signal.Each signal modulator of data acquisition card connection, and from the signal conditioner image data.Operating computer connects the pci data capture card, and operating computer is sampled to the data of obtaining from described data collecting card and data are handled, analyzed.Power supply is electrically connected with signal modulator and pci data capture card, and is they power supplies.Operating computer also connects a plurality of industrial Adam's modules, so that carry out the remote signal transmission.
Introduce above-mentioned steel ball mill condition detecting system various piece and operation principle below in detail:
One, basic principle
1.1 being steel ball bump wave, the signal that acceleration transducer measured watt produces.The steel ball of different-diameter is different with the natural frequency of vibration because of its acceleration, and Impact energy is also different, is delivered to bearing block by grinding cylinder.Therefore the signal accepted of acceleration transducer is the variation of the natural frequency of vibration and the amplitude of steel ball itself, and when constantly clashing into cylindrical shell for a large amount of steel balls, the signal that sensor is accepted has direct related with the ratio of steel ball different-diameter.
1.2 energy maximum when when empty mill, not having the damping action of coal, i.e. coal load quantity minimum, the relation of being inversely proportional to.When allowing maximum coal-supplying amount, steel ball bump rule is basic identical, but energy reduces greatly, so coal load quantity maximum, i.e. coal load quantity signal and the energy spectrum signal relation of being inversely proportional to.Learn the proportionate relationship of steel ball size equally by mathematical analysis and conversion.Representative in the steel ball ratio that records about less than 10% than normal coal-supplying amount in general.
1.3 since steel ball mill one week of low speed rotation in 2.5-3 second, bearing vibration amplitude frequency own is very low, to measuring not influence.
1.4 with one 350/600 steel ball mill is example, general power plant steel ball loading capacity is about 50T, steel ball size is 40 3 kinds of φ 60, φ 50 and φ, if the steel ball ratio is 3:4:3, calculate by weight its dress ball number about about 90,000, whenever turning around, it is about 1/10 to be carried into steel ball that tube goes up, and per second mostly is 10,000 steel balls most.And acceleration transducer frequency measurement resolution ratio is 10K/ second, therefore can satisfy the measurement requirement of different model steel ball mill.
1.5 its frequency distribution of steel ball of various diameters is in 2K to 6K scope as can be known from the frequency distribution [being Fourier transform] of energy spectrum, wherein 1K to 3K scope is that little big small ball clashes into the energy of generation simultaneously.Therefore the regularity of distribution of energy spectrum can be represented the rule and the coal load quantity signal of steel ball different-diameter ratio percentage.
Two, the steel ball matching of steel ball mill
2.1 native system can directly be measured steel ball magnitude proportion relation in the current mill.
Only needing to reduce coal-supplying amount about 10% 2.2 normally be in operation, move and write down historical data after 15 minutes, is 5 minutes mean value for the last time, can be drawn the ratio of different-diameter steel ball in the current mill by the record of excellent figure.
2.3 coal pulverizer is except that installing new steel ball fully additional, the ratio of seeing from excellent figure is between the φ 60-φ 55, between the φ 55-φ 45, between the φ 45-φ 35 and the steel ball ratio of φ 35-φ 25 in fact.Mill is long more running time, and φ 35 following steel balls are many more, comprises damaged steel ball.If any the steel ball of φ 70, then proportionate relationship is represented separately.
Three, the installation of acceleration transducer and use
The fixed form of acceleration transducer and use are in order to guarantee the uniformity of every mill in regularly detecting.And the bearing block of different structure has different fixed forms and requirement.
Four, amplifier
4.1 preamplifier be in order to signal linearity that the current mode acceleration transducer is detected will with amplify and then signal be amplified to-10V-+10V in, adjustable potentiometer is arranged in order to adjust output voltage amplitude in the amplifier, debug by supplier staff by the dress back in system.
4.2 acceleration transducer is to directly connecting through twin-core PVC insulation shielding cable with being not less than 0.5mm between the electric current loop.
Certainly, the utility model steel ball mill condition detecting system also can have other distortion.In a word, do conspicuous change, and other every change that does not break away from the utility model essence all should be included within the described scope of claim according to the prompting of above-mentioned example.
Claims (6)
1, steel ball mill condition detecting system,
It is characterized in that, comprise
Acceleration transducer, it is installed on the bearing block of steel ball mill;
Signal modulator, it connects described acceleration transducer, and from described acceleration transducer received signal;
Data collecting card, it connects described signal modulator, and from described signal conditioner image data;
Operating computer, it connects described data collecting card, and the data of obtaining from described data collecting card are sampled with the data processing, analyzed.
2, steel ball mill condition detecting system according to claim 1,
It is characterized in that:
Described operating computer comprises display unit and input unit.
3, steel ball mill condition detecting system according to claim 2,
It is characterized in that:
Also be included as the power supply of described signal modulator and described data collecting card power supply.
4, steel ball mill condition detecting system according to claim 3,
It is characterized in that:
Described signal modulator comprises electric current loop and the amplifier that connects by cable.
5, according to any described steel ball mill condition detecting system in the claim 1 to 4,
It is characterized in that:
The quantity of the quantity of described acceleration transducer and signal modulator is identical, and all greater than one.
6, steel ball mill condition detecting system according to claim 5,
It is characterized in that:
Described operating computer also connects a plurality of industrial Adam's modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202002571U CN201279480Y (en) | 2008-09-09 | 2008-09-09 | Steel-ball milling state detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202002571U CN201279480Y (en) | 2008-09-09 | 2008-09-09 | Steel-ball milling state detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201279480Y true CN201279480Y (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008202002571U Expired - Fee Related CN201279480Y (en) | 2008-09-09 | 2008-09-09 | Steel-ball milling state detection system |
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| Country | Link |
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| CN (1) | CN201279480Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506936A (en) * | 2011-11-02 | 2012-06-20 | 广东亚仿科技股份有限公司 | Coal load sensor |
| CN102600958A (en) * | 2012-03-30 | 2012-07-25 | 西安艾贝尔科技发展有限公司 | Dynamical system for loadage of grinding body in cylinder type ball mill and application method of dynamical system |
| CN102744131A (en) * | 2011-04-20 | 2012-10-24 | 山东理工大学 | System and method for detecting stress of ball stones |
| CN110339914A (en) * | 2019-07-18 | 2019-10-18 | 北京科技大学 | A kind of ore mill integrated operation state on-line detector and autocontrol method |
-
2008
- 2008-09-09 CN CNU2008202002571U patent/CN201279480Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744131A (en) * | 2011-04-20 | 2012-10-24 | 山东理工大学 | System and method for detecting stress of ball stones |
| CN102744131B (en) * | 2011-04-20 | 2014-04-09 | 山东理工大学 | System and method for detecting stress of ball stones |
| CN102506936A (en) * | 2011-11-02 | 2012-06-20 | 广东亚仿科技股份有限公司 | Coal load sensor |
| CN102506936B (en) * | 2011-11-02 | 2016-02-17 | 广东亚仿科技股份有限公司 | Coal load sensor |
| CN102600958A (en) * | 2012-03-30 | 2012-07-25 | 西安艾贝尔科技发展有限公司 | Dynamical system for loadage of grinding body in cylinder type ball mill and application method of dynamical system |
| CN102600958B (en) * | 2012-03-30 | 2014-08-27 | 西安艾贝尔科技发展有限公司 | Method for controlling loadage of grinding body in cylinder type ball mill |
| CN110339914A (en) * | 2019-07-18 | 2019-10-18 | 北京科技大学 | A kind of ore mill integrated operation state on-line detector and autocontrol method |
| CN110339914B (en) * | 2019-07-18 | 2023-05-05 | 北京科技大学 | Online detection device and automatic control method for comprehensive running state of ore mill |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20110909 |