CN1217465A - Method of weighing counter-balancing for bulk and apparatus thereof - Google Patents
Method of weighing counter-balancing for bulk and apparatus thereof Download PDFInfo
- Publication number
- CN1217465A CN1217465A CN 97107185 CN97107185A CN1217465A CN 1217465 A CN1217465 A CN 1217465A CN 97107185 CN97107185 CN 97107185 CN 97107185 A CN97107185 A CN 97107185A CN 1217465 A CN1217465 A CN 1217465A
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- China
- Prior art keywords
- storehouse
- blanking
- big
- osculum
- little
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- 238000005303 weighing Methods 0.000 title abstract description 12
- 239000000463 materials Substances 0.000 claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000003570 air Substances 0.000 claims description 10
- 230000001105 regulatory Effects 0.000 claims description 2
- 238000003756 stirring Methods 0.000 abstract 1
- 239000004568 cements Substances 0.000 description 6
- 238000000034 methods Methods 0.000 description 3
- 101710043757 GOT1 Proteins 0.000 description 1
- 208000008425 Protein Deficiency Diseases 0.000 description 1
- 238000010586 diagrams Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glasses Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002035 prolonged Effects 0.000 description 1
- -1 sandstone Substances 0.000 description 1
- 239000011901 water Substances 0.000 description 1
Abstract
Description
The present invention relates to a kind of to the weigh method and apparatus of counterweight of bulk cargo, especially very accurate to material metage and counterweight in cement stirs.
To the weigh method and apparatus of counterweight of bulk cargo is means commonly used in the various industries, as in concrete mixing plant, the proportioning of various materials such as cement, sandstone, yellow ground being weighed, in cement and glass production to the weigh method and apparatus of counterweight of various bulk cargos, for example in concrete mixing plant, because the material metage time is short, blanking velocity is fast, in seconds finish the heavy weighing of ton, so the precision weighing in the concrete mixing plant is different with common precision weighing.And the error of material metage comprises positive and negative two parts.Wherein, positive error is that speed is very big when falling owing to material, and the momentum that platform scale is subjected to material causes; Negative error then is because when closing the air valve of material bin, still has partial material to stay to cause in the air.This two aspects error all has very big contingency, thereby the measuring error of whole weighing system is wayward.
At present, the general technology that has once claimed that adopts of domestic mixing plant, common errors is bigger, and as CN93231583.6, CN95205394.2 all reaches counterweight to material with level-sensing device and spiral conveyer weighing and convey materials or time of directly feeding water by calculating.Also have the blanking of the point of employing dynamic formula to eliminate error in the world, make the air valve nonstop switch by pilot relay, a little adds materials, to reach accuracy requirement.Simple adopt the design of some dynamic formula to have an inevitable latent defect:,, to influence production efficiency so control consuming time morely because material is little by little to add.Simultaneously, the frequent switch of relay is easy to make its lost of life, thereby influences the production of whole cement mixing plant.Existing all there is similar problem in the weigh method and apparatus of counterweight of bulk cargo.
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of actual weighing precision is improved greatly, can surpass the like product level to the weigh method and apparatus of counterweight of bulk cargo.Make the velocity of approch of weighing fast, the production efficiency height.And reduced the frequent use of relay, thereby prolong the life-span of entire equipment.
The object of the present invention is achieved like this: the feed bin of every kind of material is provided with large and small two material outlets or two storehouses of size, and the diameter in osculum or little storehouse is the 1/5-1/15 of big mouth or big storehouse diameter; The regulatory region of material is divided into big mouthful of blanking and osculum blanking two-stage realizes, the promptly big mouthful blanking in the coarse adjustment district, open big storehouse or big mouthful of sluice gate blanking, control material amount reaches about 85% of required value fast, carrying out the osculum blanking again is the fine tuning district, open little storehouse or the blanking of osculum sluice gate, control material amount reaches about 99% of required value.So last precision can reach 98%, has reached international most advanced level.
The present invention is according to practical production experience, when the diameter in osculum or little storehouse be big mouthful or big storehouse diameter 1/10 the time, tectonic model also carries out fuzzy logic control with this:
A. each systematic error is that little storehouse systematic error is about 1/10 of big storehouse in whereabouts total amount ± 10%;
B. closed behind the sluice gate 0.5 second at every turn, and can think that the platform scale reading reached actual value;
C. assign the time delay of instructing air valve to finish on-off action from computing machine is fixed value at every turn.
The present invention has following effect: (1) actual weighing precision is higher than 98%, if adopt the crawl blanking of osculum again after the fine tuning district, its weighing precision can be higher than 99%, has surpassed international like product level.(2) reduce the frequent use of relay, thereby prolonged the life-span of whole mixing plant.(3) velocity of approch is fast, the production efficiency height.Purposes of the present invention is wider, is particularly useful for accurate weighing device in the concrete mixing plant.
The invention will be further described below in conjunction with accompanying drawing with by embodiment:
Fig. 1 is the structural representation of material bin device of the present invention
Fig. 2 is large and small mouthful a program circuit synoptic diagram of a certain material material bin of control of the present invention
According to the above-mentioned model that obtains according to practice, for reaching the highest precision, division blanking process is as follows: and see figures.1.and.2.
A. the sluice gate blanking of big storehouse is opened in the coarse adjustment control zone, makes platform scale reading B reach 85% of required value A fast, count systematic error, so actual value is 93.5%～76.5%;
B. the sluice gate blanking of little storehouse is opened in the fine tuning control zone, makes platform scale reading C reach 99% of required value A, counts systematic error, and actual value is (98 ± 0.45)～(98 ± 2.15) %.For near the egregious cases (98 ± 2.15) %, occurrence probability is minimum, because for fixed system, big storehouse is that maximum little storehouse of minus tolerance while is the probability ≈ 0 of maximum principal-employment, thus can ignore, and write down the time t2-t1 that open in little storehouse,
C. establish an accurate adjustment control zone in addition, i.e. osculum crawl blanking control, the little storehouse blanking velocity that utilizes the fine tuning district to calculate can accurately be extrapolated little storehouse crawl opening time T.T=(A-C)/(C-B) (t2-t1), and equal the speed of the difference of weight of material divided by the blanking of little storehouse.Once finish blanking, make the platform scale reading reach required value.The very definite flow chart that has provided control procedure in Fig. 2.
Device of the present invention is most important to be shown in the design of material bin, each material bin 1 is equipped with big mouthful of 1-1 and osculum 2-2, big mouth and osculum all have its keying of cylinder Air Valve Control, the feed bin of every kind of material is provided with large and small two material outlets or two storehouses of size, the diameter in osculum or little storehouse is the 1/5-1/15 of big mouthful or big storehouse diameter, and present embodiment is got 1/10 control that can obtain optimization.Certainly, if the storehouse of every kind of material is provided with two of sizes, big storehouse is provided with large outlet, and little storehouse is provided with little outlet, controls large and small outlet respectively in coarse adjustment and accurate adjustment control zone and does not also exceed the scope of protection of present invention.
Other device of the present invention and control device comprise conventional poidometer and have the production control device and the cylinder air valve actuating unit thereof of microprocessor, the valve of cylinder air valve interlock feed bin, poidometer is an electronic scale, be located at the position that feed bin is weighed, the signal of its output weight connects the input port of microprocessor, microprocessor keying of by-pass valve control by the size of continuous detection and heavier value.This needn't be described in detail for technology and device commonly used.
The present invention is particularly useful in the cement mixing plant, and the control of material such as sandstone, cement, yellow ground are all adopted same procedure control, and certainly, predetermined value A is different, and this value has been determined concrete prescription.
The present invention and error control scheme have all obtained good checking in practice.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97107185 CN1217465A (en) | 1997-11-06 | 1997-11-06 | Method of weighing counter-balancing for bulk and apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97107185 CN1217465A (en) | 1997-11-06 | 1997-11-06 | Method of weighing counter-balancing for bulk and apparatus thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1217465A true CN1217465A (en) | 1999-05-26 |
Family
ID=5169361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97107185 CN1217465A (en) | 1997-11-06 | 1997-11-06 | Method of weighing counter-balancing for bulk and apparatus thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1217465A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451575C (en) * | 2006-01-19 | 2009-01-14 | 云南昆船设计研究院 | Multiple cavity gage line for materiel |
| CN104261149A (en) * | 2014-08-07 | 2015-01-07 | 西安航天化学动力厂 | Dynamic weighing and feeding device for spherical oxidant and control method |
| CN105136259A (en) * | 2015-07-16 | 2015-12-09 | 安徽正远包装科技有限公司 | Two-end electronic weighing machine |
| CN105841783A (en) * | 2015-01-12 | 2016-08-10 | 中联重科股份有限公司 | Material metering device and control method therefor |
| CN106325312A (en) * | 2016-06-08 | 2017-01-11 | 武汉科技大学 | Multi-stage blanking and dynamically corrected monitoring type automatic batching control method and system |
| CN107478308A (en) * | 2017-07-30 | 2017-12-15 | 合肥徽工工业自动化工程有限公司 | A kind of multistage blanking and the Automatic Burden Control method of dynamic corrections |
| CN108955850A (en) * | 2018-07-06 | 2018-12-07 | 川田机械制造(上海)有限公司 | The automatic method for obtaining metering preset value for dosing machine |
| CN109519585A (en) * | 2018-10-26 | 2019-03-26 | 武汉智能装备工业技术研究院有限公司 | One kind opening valve device and opens valve method |
-
1997
- 1997-11-06 CN CN 97107185 patent/CN1217465A/en not_active Application Discontinuation
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451575C (en) * | 2006-01-19 | 2009-01-14 | 云南昆船设计研究院 | Multiple cavity gage line for materiel |
| CN104261149A (en) * | 2014-08-07 | 2015-01-07 | 西安航天化学动力厂 | Dynamic weighing and feeding device for spherical oxidant and control method |
| CN105841783A (en) * | 2015-01-12 | 2016-08-10 | 中联重科股份有限公司 | Material metering device and control method therefor |
| CN105136259A (en) * | 2015-07-16 | 2015-12-09 | 安徽正远包装科技有限公司 | Two-end electronic weighing machine |
| CN106325312A (en) * | 2016-06-08 | 2017-01-11 | 武汉科技大学 | Multi-stage blanking and dynamically corrected monitoring type automatic batching control method and system |
| CN106325312B (en) * | 2016-06-08 | 2019-03-08 | 武汉科技大学 | A kind of Automatic Burden Control method and system of multistage blanking and dynamic corrections monitoring |
| CN107478308A (en) * | 2017-07-30 | 2017-12-15 | 合肥徽工工业自动化工程有限公司 | A kind of multistage blanking and the Automatic Burden Control method of dynamic corrections |
| CN108955850A (en) * | 2018-07-06 | 2018-12-07 | 川田机械制造(上海)有限公司 | The automatic method for obtaining metering preset value for dosing machine |
| CN108955850B (en) * | 2018-07-06 | 2019-08-27 | 川田机械制造(上海)有限公司 | The automatic method for obtaining metering preset value for dosing machine |
| CN109519585A (en) * | 2018-10-26 | 2019-03-26 | 武汉智能装备工业技术研究院有限公司 | One kind opening valve device and opens valve method |
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