CN101089564A - Level measurement instrument - Google Patents
Level measurement instrument Download PDFInfo
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- CN101089564A CN101089564A CN 200710055660 CN200710055660A CN101089564A CN 101089564 A CN101089564 A CN 101089564A CN 200710055660 CN200710055660 CN 200710055660 CN 200710055660 A CN200710055660 A CN 200710055660A CN 101089564 A CN101089564 A CN 101089564A
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Abstract
A measurer of material level is prepared as setting rope wheel and force sensing transducer with pulley on support, arranging strut with pulley at top of pulverized coal cabin, setting sealed unit and position transducer in said strut, placing measurement rope on two said pulleys, connecting one end of said rope to rope wheel and fixing another end of said rope with weight through said sealed unit, using motor to drive rope wheel to rotate, using magnetic coder to detect angular displacement of motor and forming host unit by control circuit using CPU as main element.
Description
Technical field
The present invention relates to a kind of level indicator.
Background technology
At present, the Pulverized Coal Bin of generating plant and the level gauging in grey storehouse, the general ultrasonic meter that uses is measured, in the process of measuring, because the coal dust or the coal ash Mi on upper strata overflow in air, cause hyperacoustic reflection horizon uncertain, thereby cause level gauging inaccurately, can't record real material level.And previously used Weight type machinery level indicator, when being used for the level gauging in Pulverized Coal Bin and grey storehouse, because the fineness of coal dust or coal ash is very little, its weight can directly be fallen Pulverized Coal Bin and grey bottom of the reservior, can't measure material level.
Summary of the invention
The objective of the invention is to measure the problem of Pulverized Coal Bin and grey storehouse material level, and a kind of level indicator that can measure Pulverized Coal Bin and grey storehouse material level is provided in order to solve existing level indicator.
The present invention is by support, motor, lining rope, rope sheave, pulley, magnetic coder, force-sensing sensor, main computer unit, support, position transducer, packoff, weight, magnet is formed, wherein, rope sheave is arranged on the support, this rope sheave of driven by motor can rotate, force-sensing sensor is set on the support, on this force-sensing sensor pulley is set, support is arranged on the top in Pulverized Coal Bin or grey storehouse, this support top is provided with pulley, be provided with packoff and position transducer in the support, lining rope rides on two pulleys on support and the support, one end of lining rope is on rope sheave, the other end passes packoff and fixing weight, this weight is positioned at Pulverized Coal Bin or grey storehouse, has magnet in this weight, magnetic coder is used to detect the angular displacement of motor, force-sensing sensor is used to detect the quick numerical value of power of weight, position transducer is used to detect the position of weight, main computer unit is by being the control circuit that main element is formed with CPU, this main computer unit has man-machine interface, the DCS interface, the height material level is reported to the police and is exported and the output of 4～20mA material level, this man-machine interface connects keyboard, magnetic coder, force-sensing sensor, position transducer is electrically connected with main computer unit.
The present invention also has on-the-spot material level display and control device far away is electrically connected with main computer unit, this scene material level display can directly show the numerical value of material level at the scene, it is indoor that control device far away can be arranged on centralized control, be used for the testing process of material level is controlled, this control device far away has red and green color material level simulation demonstration and the monochrome digital material level shows, also having the output of warning, the output of 4～20mA material level, DCS interface.
In addition, force-sensing sensor can be suspended on the support, and pulley is suspended in the lower end of force-sensing sensor.
Principle of work of the present invention:
As shown in Figure 3, the present invention adopts the weight-loss method principle to measure, main computer unit is when confirming measurement requirement is arranged, position transducer is checked the weight position earlier by the magnet in the induction weight, according to institute's location survey amount mode treatment suitable after, put down lining rope, main computer unit is done the length computation of compartment analysis and lining rope to weight in whole process is measured, at this moment, main computer unit and control device far away all have the dynamic digital of weight position to show, and be when detecting the material level face, dark according to the storehouse that user program is set, provide material level, that is: material level=storehouse dark-put the sagging degree of depth of rope length+weight in measured medium.Main computer unit and control device far away lock material level numeral of this time measuring, provide corresponding 4～20mA output and height warning output, after this weight are regained, and finish one-shot measurement.
Beneficial effect of the present invention:
Double function and the advantage of holding traditional mechanical formula level-sensing device and ultrasound wave or reflection wave level-sensing device; Traditional mechanical formula level-sensing device measurement result is reliable, the repeatable accuracy height, and antijamming capability is strong, but can not do continuous coverage usually, and the even weakness that disorder cable is arranged, bury rope; The reflection wave level-sensing device can be done continuous non-cpntact measurement, but error is big, and the authenticity of measuring repeatable accuracy is difficult to be held, the antijamming capability of rugged surroundings relatively a little less than; The present invention has three kinds of measurement patterns, and all parameter all can be set up on their own by the user, uses to adapt to different occasions;
(1), high order modes: the each measurement, weight is transferred from Hatch Opening, measures the withdrawal Hatch Opening, is fit to the dark environment in little storehouse and uses.
(2), half high order modes: power on first, weight is transferred from Hatch Opening, measures main computer unit according to internal upper part space, storehouse size, seeks a correct position automatically and stops weight, next time is when measuring, weight directly from then on the position begin to transfer measurement, when upper space did not satisfy condition, main computer unit can change high order modes automatically over to, after the condition for the treatment of is suitable, recover half high order modes again, half high order modes general measure time only was half of high order modes, this means to provide the material level result quickly; Because the folding and unfolding rope is apart from weak point, it is also few that lining rope is hung sticking measured medium, and the wearing and tearing of drive disk assembly are relatively also little, is particularly suitable for the dark environment in big storehouse and uses.
(3), low bit pattern: i.e. Continuous Tracking pattern, similar with half high order modes, different is to receive the rope distance to be set by the user, 0.4m～0.7m does not wait, select this pattern for use after, main computer unit can every interval be measured once in 20 seconds, weight is always remained near the material level face, this pattern just provided the result in common several seconds owing to nearer apart from material level, was fit to the environment use faster of material level fluctuations.
(4), the material level of the present invention's measurement is real original material level face, different with traditional mechanical formula level-sensing device is, the degree of depth of the sagging measured matter of material level that the present invention measures and weight is irrelevant, program in service can be searched maximum, force value point and the material level before the weight weightlessness automatically, so, the fluffy degree of measurement result and measured object is irrelevant, and this mode can reach the non-cpntact measurement effect.
(5), the present invention has and buries the rope function of saving oneself, the user can set up on their own and use or do not use this function, when selecting to use, as the storehouse of collapsing, blanking, when accidental weight is buried, just enter the state of saving oneself in two seconds automatically, the main computer unit complete apish action of saving oneself, elder generation's slack rope one second, received rope four seconds again, so per ten seconds circulation primary were received in the rope at four seconds, continued pulling as weight, just Electric Machine Control is delivered back master routine and normally move, this function is passed through multiple authentication at the scene, and success ratio reaches 100%.
(6), the present invention has long-distance transmissions, automatic monitoring function, and can realize measurement requirement by following multiple mode:
A) the operation key that carries of main computer unit is manually imported response;
B) the manual measurement key of control device far away is manually imported response;
C) timing that the user sets on the main computer unit measures time response;
D) the DCS system level signal response of sending;
E) timing response in the machine of Continuous Tracking pattern.
The present invention is as in the operating measurement state, and above-mentioned any new measurement requirement is regarded as this measuring process, can not be repeated response.
(7), has automatic Presentation Function.
(8), has automatic warning function, upper and lower spacing alarm settings and acoustic alarm output.
(9), measure weight and bury underground by anti-, have different structure according to different field conditions.
(10), gear drive, lining rope freely twines, and guarantees that main frame operates steadily, not disorder cable.
(11), main frame is away from bin opening, can prevent that dust from entering in the main frame.
(12), main computer unit and control device slave computer far away all have the output of independently reporting to the police, 4～20mA output, the DCS interface makes things convenient for terminal block.
Description of drawings
Fig. 1 is the structural representation of the present invention's first embodiment.
Fig. 2 is the structural representation of the present invention's second embodiment.
Fig. 3 is a work block diagram of the present invention.
Embodiment
See also shown in Figure 1, be the first embodiment of the present invention, the present invention is made up of support 2, motor 3, lining rope 11, rope sheave 5, pulley 9,17, magnetic coder 8, force-sensing sensor 10, main computer unit 7, support 14, position transducer 12, packoff 13, weight 15, magnet, wherein, support 2 is arranged on the fluffy plate 1 in Pulverized Coal Bin or grey storehouse 16, rope sheave 5 is arranged on the support 2, motor 3 drives this rope sheave 5 and can rotate, force-sensing sensor 10 is set on the support 2, on this force-sensing sensor 10 pulley 9 is set; Support 2, motor 3, lining rope 11, rope sheave 5, pulley 9, magnetic coder 8, force-sensing sensor 10 cover in the protective cover 4;
The present invention also has on-the-spot material level display (not shown) and control device far away 6 is electrically connected with main computer unit 7, this scene material level display can directly show the numerical value of material level at the scene, it is indoor that control device 6 far away can be arranged on centralized control, be used for the testing process of material level is controlled, this control device 6 far away has red and green color material level simulation demonstration and the monochrome digital material level shows, also having the output of warning, the output of 4～20mA material level, DCS interface.
See also shown in Figure 2ly, be the second embodiment of the present invention, the difference of this embodiment and first embodiment is, force-sensing sensor 10 is suspended on the support 2, and pulley 9 is suspended in the lower end of force-sensing sensor 10.
Claims (4)
1, a kind of level indicator, it is characterized in that: be by support, motor, lining rope, rope sheave, pulley, magnetic coder, force-sensing sensor, main computer unit, support, position transducer, packoff, weight, magnet is formed, wherein, rope sheave is arranged on the support, this rope sheave of driven by motor can rotate, force-sensing sensor is set on the support, on this force-sensing sensor pulley is set, support is arranged on the top in Pulverized Coal Bin or grey storehouse, this support top is provided with pulley, be provided with packoff and position transducer in the support, lining rope rides on two pulleys on support and the support, one end of lining rope is on rope sheave, the other end passes packoff and fixing weight, this weight is positioned at Pulverized Coal Bin or grey storehouse, has magnet in this weight, motor can drive rope sheave and rotate, magnetic coder is used to detect the angular displacement of motor, force-sensing sensor is used to detect the quick numerical value of power of weight, position transducer is used to detect the position of weight, main computer unit is by being the control circuit that main element is formed with CPU, this main computer unit has man-machine interface, the DCS interface, the height material level is reported to the police and is exported and the output of 4～20mA material level, this man-machine interface connects keyboard, magnetic coder, force-sensing sensor, position transducer is electrically connected with main computer unit.
2, a kind of level indicator according to claim 1, it is characterized in that: described force-sensing sensor is suspended on the support, and pulley is suspended in the lower end of force-sensing sensor.
3, a kind of level indicator according to claim 1 and 2 is characterized in that: described main computer unit is electrically connected with on-the-spot material level display, and this scene material level display directly shows the numerical value of material level at the scene.
4, a kind of level indicator according to claim 1 and 2, it is characterized in that: described main computer unit is electrically connected with control device far away, this control device far away is used for the testing process of material level is controlled, this control device far away has red and green color material level simulation demonstration and the monochrome digital material level shows, also having the output of warning, the output of 4～20mA material level, DCS interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710055660XA CN100476372C (en) | 2007-05-23 | 2007-05-23 | Level measurement instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710055660XA CN100476372C (en) | 2007-05-23 | 2007-05-23 | Level measurement instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101089564A true CN101089564A (en) | 2007-12-19 |
| CN100476372C CN100476372C (en) | 2009-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710055660XA Active CN100476372C (en) | 2007-05-23 | 2007-05-23 | Level measurement instrument |
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| CN (1) | CN100476372C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907483A (en) * | 2010-06-29 | 2010-12-08 | 重庆大唐科技股份有限公司 | Dynamic weighing device for coal-fired boiler |
| CN102735311A (en) * | 2012-06-18 | 2012-10-17 | 江苏中旗作物保护股份有限公司 | Material level detecting device |
| CN103017859A (en) * | 2012-12-06 | 2013-04-03 | 广西大学 | Contact type high-temperature metal meltwater liquid level height measuring device |
| CN104444882A (en) * | 2014-12-16 | 2015-03-25 | 中联重科股份有限公司 | Winch system and crane comprising same |
| CN105318853A (en) * | 2015-12-09 | 2016-02-10 | 天津博远达科技有限公司 | Crystal pool salt layer thickness and brine depth measurement device |
| CN105333919A (en) * | 2015-12-08 | 2016-02-17 | 大连华锐重工集团股份有限公司 | Steel chisel inclined inserting type heavy material level meter of industrial furnace |
| CN107131926A (en) * | 2017-05-12 | 2017-09-05 | 中国城市建设研究院有限公司 | The material-level detecting device of kitchen garbage pressurized tank |
| CN111561663A (en) * | 2020-05-20 | 2020-08-21 | 福建省伟志地理信息科学研究院 | Urban pipe network measuring device and measuring method thereof |
-
2007
- 2007-05-23 CN CNB200710055660XA patent/CN100476372C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907483A (en) * | 2010-06-29 | 2010-12-08 | 重庆大唐科技股份有限公司 | Dynamic weighing device for coal-fired boiler |
| CN102735311A (en) * | 2012-06-18 | 2012-10-17 | 江苏中旗作物保护股份有限公司 | Material level detecting device |
| CN103017859A (en) * | 2012-12-06 | 2013-04-03 | 广西大学 | Contact type high-temperature metal meltwater liquid level height measuring device |
| CN103017859B (en) * | 2012-12-06 | 2015-07-08 | 广西大学 | Contact type high-temperature metal meltwater liquid level height measuring device |
| CN104444882A (en) * | 2014-12-16 | 2015-03-25 | 中联重科股份有限公司 | Winch system and crane comprising same |
| CN105333919A (en) * | 2015-12-08 | 2016-02-17 | 大连华锐重工集团股份有限公司 | Steel chisel inclined inserting type heavy material level meter of industrial furnace |
| CN105318853A (en) * | 2015-12-09 | 2016-02-10 | 天津博远达科技有限公司 | Crystal pool salt layer thickness and brine depth measurement device |
| CN107131926A (en) * | 2017-05-12 | 2017-09-05 | 中国城市建设研究院有限公司 | The material-level detecting device of kitchen garbage pressurized tank |
| CN111561663A (en) * | 2020-05-20 | 2020-08-21 | 福建省伟志地理信息科学研究院 | Urban pipe network measuring device and measuring method thereof |
| CN111561663B (en) * | 2020-05-20 | 2021-10-01 | 福建省伟志地理信息科学研究院 | Urban pipe network measuring device and measuring method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100476372C (en) | 2009-04-08 |
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