CN1217465A - Method of weighing counter-balancing for bulk and apparatus thereof - Google Patents

Method of weighing counter-balancing for bulk and apparatus thereof Download PDF

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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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CN
China
Prior art keywords
storehouse
blanking
big
osculum
little
Prior art date
Application number
CN 97107185
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Chinese (zh)
Inventor
徐健健
刘先昆
孙晓村
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南京大学
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 南京大学 filed Critical 南京大学
Priority to CN 97107185 priority Critical patent/CN1217465A/en
Publication of CN1217465A publication Critical patent/CN1217465A/en

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Abstract

The present invention relates to a weighing and propertioning method for bulk and its equipment. It is characterized by that for every kind of material, it possesses a large outlet and a small outlet or a large bin and a small bin, and the diameter of small outlet or small bin is 1/5-1/15 of the diameter of large outlet or large bin, and the discharge regulation is implemented by two-stage discharge, i. e. it uses the large outlet as coarse regulation zone to quickly discharge material to about 85% of demand value, then uses the small outlet as fine regulation zone to more discharge material to about 99% of demand value to obtain high-accuracy discharge whose accuracy is above 99%, and can prolong the service life of stirring machine, and can raise production effency.

Description

A kind of to the weigh method and apparatus of counterweight of bulk cargo

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)

1. one kind to the weigh method of counterweight of bulk cargo, it is characterized in that 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 be big mouthful or the 1/5-1/15 of storehouse diameter greatly; 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.
2. described to the weigh method of counterweight of bulk cargo by claim 1, it is characterized in that establishing in addition an accurate adjustment control zone, i.e. osculum crawl blanking control.
3. by claim 1,2 described to the weigh method of counterweight of bulk cargo, it is characterized in that the little storehouse blanking velocity that utilizes the fine tuning region measurement to go out, can accurately extrapolate little storehouse crawl opening time T, and equal the speed of the difference of weight of material divided by the blanking of little storehouse.
4. one kind to the weigh device of counterweight of bulk cargo, comprise material bin, conventional poidometer and the production control device and the cylinder air valve actuating unit thereof that have 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, it is characterized in that 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 greatly, little two material outlets or two storehouses of size, the diameter in osculum or little storehouse are the 1/5-1/15 of big mouth or big storehouse diameter.
5. by the weigh device of counterweight of the described bulk cargo of claim 4, it is characterized in that 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.
6. by the weigh device of counterweight of claim 4,5 described bulk cargos, the diameter that it is characterized in that described feed bin osculum or little storehouse is 1/10 of big mouthful or big storehouse diameter.
CN 97107185 1997-11-06 1997-11-06 Method of weighing counter-balancing for bulk and apparatus thereof CN1217465A (en)

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

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CN1217465A true CN1217465A (en) 1999-05-26

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Cited By (8)

* Cited by examiner, † Cited by third party
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

Cited By (10)

* Cited by examiner, † Cited by third party
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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