CN202853730U - On-line calibration system for electronic belt scale - Google Patents
On-line calibration system for electronic belt scale Download PDFInfo
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- CN202853730U CN202853730U CN 201220440582 CN201220440582U CN202853730U CN 202853730 U CN202853730 U CN 202853730U CN 201220440582 CN201220440582 CN 201220440582 CN 201220440582 U CN201220440582 U CN 201220440582U CN 202853730 U CN202853730 U CN 202853730U
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Abstract
Disclosed is an on-line calibration system for an electronic belt scale, comprising a delivery mechanism, wherein the upper portion of the delivery mechanism is a delivery belt while the lower portion of the delivery mechanism is a return stroke belt; the delivery mechanism is internally provided with a detecting scale and a to-be-detected scale; the upper portions of the detecting scale and the to-be-detected scale are fixedly provided with at least one carrier roller respectively; the carrier rollers are tightly attached to the lower side of the delivery belt; and the upper portion of the detecting scale is further provided with weights. The on-line calibration system of the utility model is capable of calibrating the electronic belt scale during the material-transporting process. Moreover, the online load calibration eliminates the influence of the belt tension upon the usage precision of the electronic belt scale under the empty band and loading state.
Description
Technical field
The utility model relates to a kind of belted electronic balance calibration system, relates in particular to a kind of belted electronic balance on-line proving system that can finish demarcation under load condition.
Background technology
At present, along with developing rapidly of electronic technology, mainly be to adopt belted electronic balance that the material in the course of conveying is weighed continuously dynamically, and the advantage such as little with space hold, that price is relatively low, maintaining is easy, be applied to the industries such as coal, chemical industry, building materials, harbour, power plant, grain processing much more more and more, and become requisite weighing-appliance.
But, select which kind of scaling method and how to improve the degree of accuracy of demarcation, become present urgent problem.
At present, it is that blanking bar is demarcated mode that the simulated calibration of belted electronic balance is mainly adopted, at first place the counterweight of known weight at belted electronic balance, by the time of belt operation integer circle, pass through again the reading of read electric belt conveyer scale dial plate, the cumulative amount that calculates with counterweight compares, the difference that contrasts both is adjusted flow modificatory coefficient, but there is defective in this kind modification method: clearly belted electronic balance is to measure for the material to transportation, belt state in material conveying process and the belt state of no-load running are different, wherein be apparent that most the variation of belt tension, can cause the uncertain of calibrated error, the stability of belt conveyer scale is brought very large impact.
The utility model content
The technical problems to be solved in the utility model provides a kind of belted electronic balance on-line proving system that can demarcate belted electronic balance in the material transportation process.
In order to solve the problems of the technologies described above, the utility model provides a kind of belted electronic balance on-line proving system, include conveying device, the top of described conveying device is belt conveyor, the bottom of described conveying device is return belt, and described conveying device inside is provided with detects scale and detected scale, and described detection scale and detected scale top are fixed with respectively at least one carrying roller, described carrying roller is close to the belt conveyor downside, and described detection scale top also is provided with counterweight.
Further, the carrying roller on described detection scale top is four and is symmetrical arranged.
Further, the carrying roller on described detected scale top is four and is symmetrical arranged.
Further, described detection scale also is provided with the counterweight automatic loading device.
Further, also be provided with velometer in the described conveying device, the return belt upside is close in the bottom of described velometer.
The utility model can be demarcated belted electronic balance in the material transportation process, and load calibration has been eliminated under blanking bar and the load condition online, and belt tension is on the impact of belted electronic balance service precision.
Description of drawings
Fig. 1 is the side view of the utility model belted electronic balance on-line proving one embodiment of system;
Fig. 2 is the vertical view of the utility model belted electronic balance on-line proving system.
Among the figure, 1. belt conveyor, 2. return belt 3. detects scale, 4. detected scale, 5. material, 6. carrying roller, 7. counterweight automatic loading device, 8. velometer.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the utility model and being implemented, but illustrated embodiment is not as to restriction of the present utility model.
As shown in Figure 1, embodiment for this use Novel electronic belt weigher on-line proving system, include conveying device, the top of described conveying device is belt conveyor 1, the bottom of described conveying device is return belt 2, described conveying device inside is provided with detects scale 3 and detected scale 4, and described detection scale 3 tops also are provided with counterweight.
Described detection scale 3 and detected scale 4 tops are fixed with respectively at least one carrying roller 6, described carrying roller 6 is close to belt conveyor 1 downside, in the present embodiment, the carrying roller 6 on described detection scale 3 tops is four and is symmetrical arranged that the carrying roller 6 on described detected scale 4 tops is four and is symmetrical arranged.
The layout that detects scale 3 and detected scale 4 is the direction setting according to the material operation, but not restriction of distance between the two.For the loading work that detects scale 3 counterweights, can also can finish loading by machine automatization by manually finishing loading, in the present embodiment, described detection scale 3 is provided with counterweight automatic loading device 7, by electric (or hydraulic pressure) robot brain tool arm, mechanical arm clamping counterweight and counterweight is placed on detects on the scale 3.
Also be provided with velometer 8 in the described conveying device, return belt 2 upsides are close in the bottom of described velometer 8, can in time measure the travelling speed of belt.
The embodiment that the utility model is demarcated at first under the condition of blanking bar, uses conventional method to carry out Zero calibration to detecting scale 3 and detected scale 4.
Before the on-line proving correction, at first to detect the comparison of scale 3 and detected scale 4 error consistencies, namely under load condition, judge the consistance that detects scale and detected scale cumulative errors.
During belt conveyor 1 convey materials, in belt moves whole circle time range, judge 4 pairs of relative errors that detect scale 3 of detected scale, namely whether detected scale 4 dial readings and the difference that detects scale 3 dial readings and the ratio that detects scale 3 dial readings is in ± index that 0.25%(requires about repeated 5.6.1 according to GB/T7721-2007) in the scope, if so, then carry out next step, if not, then regulate the calibration coefficient of detected scale 4, repeat until reach ± 0.25% scope in.Our purpose is not to measure weight in kind herein, but the error consistency that will guarantee two scales be controlled at ± 0.25% scope in.
After finishing the consistance judgement of error, the counterweight automatic loading device 7 that detects scale 3 is loaded into counterweight and detects on the scale 3, the theory calculating cumulative amount that loads counterweight is Wg, in the time range of the whole circle multiple of belt, add up detecting scale 3 and detected scale 4, the whole circle multiple of selecting belt is the cumulative errors that produce in order to eliminate the belt became uneven.
As shown in Figure 2, the distance between two carrying rollers is b, when the distance to first carrying roller that detects scale 3 is a, detects scale 3 and begins metering; When the distance to first carrying roller that is detected scale 4 was a, detected scale 4 began metering, a=0.5b.
The distance that detects between scale 3 and the detected scale 4 weighing length starting points is d, and drawing the time that belt moves by distance d by actual measurement is t; The cumulative time of detecting between the scale 3 accumulative total t1 zero hour and the finish time t3 is the time of the whole circle multiple of belt; Cumulative time between the detected scale 4 accumulative total t2 zero hour and the finish time t4 is the time of the whole circle multiple of same belt, then:
The zero hour: begin metering when detecting scale t1, begin metering during detected scale t2=t1+t;
The finish time: stop metering when detecting scale t3, stop metering during detected scale t4=t3+t.
Can obtain this moment, detects scale cumulative amount: Wt
Detected scale cumulative amount: Wbt
Then carrying out error correction calculates:
Detect the detected actual cumulative amount Wp of scale cumulative amount Wbt=counterweight of scale cumulative amount Wt-, further relatively revise calibration coefficient by Wp and Wg.
Correction formula: Kq '=Wg/Wp * Kq
Detect scale cumulative amount Wt;
Detected scale cumulative amount Wbt;
The theory of counterweight is calculated cumulative amount: Wg;
The actual cumulative amount Wp of counterweight;
Distance between the two scale weighing length starting points: d;
T working time of the distance between the two scale weighing length starting points;
Calibration coefficient Kq before revising;
Calibration coefficient Kq ' after revising.
Calculate to detect respectively the rear calibration coefficient Kq ' that is corrected of scale 3 and detected scale 4, will detect scale 3 simultaneously and detected scale 4 is revised, thereby further improve the calibration accuracy that is detected scale 4.
Counterweight accumulative total relative error is controlled at ± can satisfy the on-site proving requirement of present 0.5 grade of belt conveyer scale in 0.25% scope.
Counterweight accumulative total relative error=(Wp-Wg)/Wg * 100%;
It is counterweight weight that the theory of counterweight is calculated cumulative amount Wg=G/l * L(G, and l is weighing length, and L is Belt Length);
The utility model has been eliminated under blanking bar and the load condition belt tension to the impact of belted electronic balance service precision by online load calibration.
The above embodiment is the preferred embodiment that proves absolutely that the utility model is lifted, and protection domain of the present utility model is not limited to this.Being equal to that those skilled in the art do on the utility model basis substitutes or conversion, all within protection domain of the present utility model.Protection domain of the present utility model is as the criterion with claims.
Claims (5)
1. belted electronic balance on-line proving system, include conveying device, the top of described conveying device is belt conveyor, the bottom of described conveying device is return belt, it is characterized in that described conveying device inside is provided with detects scale and detected scale, described detection scale and detected scale top are fixed with respectively at least one carrying roller, described carrying roller is close to the belt conveyor downside, and described detection scale top also is provided with counterweight.
2. belted electronic balance on-line proving according to claim 1 system is characterized in that the carrying roller on described detection scale top is four and is symmetrical arranged.
3. belted electronic balance on-line proving according to claim 1 system is characterized in that the carrying roller on described detected scale top is four and is symmetrical arranged.
4. belted electronic balance on-line proving according to claim 1 system is characterized in that described detection scale also is provided with the counterweight automatic loading device.
5. belted electronic balance on-line proving according to claim 1 system is characterized in that also be provided with velometer in the described conveying device, the return belt upside is close in the bottom of described velometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220440582 CN202853730U (en) | 2012-08-31 | 2012-08-31 | On-line calibration system for electronic belt scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220440582 CN202853730U (en) | 2012-08-31 | 2012-08-31 | On-line calibration system for electronic belt scale |
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| Publication Number | Publication Date |
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| CN202853730U true CN202853730U (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220440582 Expired - Fee Related CN202853730U (en) | 2012-08-31 | 2012-08-31 | On-line calibration system for electronic belt scale |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471698A (en) * | 2013-10-08 | 2013-12-25 | 莱芜钢铁集团有限公司 | Checking method for electronic belt scale |
| CN110646077A (en) * | 2019-10-29 | 2020-01-03 | 安徽恒远电子称重设备有限公司 | Compression resistance testing device for load-bearing panel of explosion-proof truck scale and using method thereof |
-
2012
- 2012-08-31 CN CN 201220440582 patent/CN202853730U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471698A (en) * | 2013-10-08 | 2013-12-25 | 莱芜钢铁集团有限公司 | Checking method for electronic belt scale |
| CN103471698B (en) * | 2013-10-08 | 2015-06-10 | 莱芜钢铁集团有限公司 | Checking method for electronic belt scale |
| CN110646077A (en) * | 2019-10-29 | 2020-01-03 | 安徽恒远电子称重设备有限公司 | Compression resistance testing device for load-bearing panel of explosion-proof truck scale and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20180831 |
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| CF01 | Termination of patent right due to non-payment of annual fee |