CN101922960B

CN101922960B - Method and device for metering belt conveyor for weighing continuous balk cargo

Info

Publication number: CN101922960B
Application number: CN2009101170615A
Authority: CN
Inventors: 徐厚胜
Original assignee: SANAISI ELECTRONIC CO Ltd TONGLING
Current assignee: SANAISI ELECTRONIC CO Ltd TONGLING
Priority date: 2009-06-12
Filing date: 2009-06-12
Publication date: 2012-04-25
Anticipated expiration: 2029-06-12
Also published as: CN101922960A

Abstract

The invention discloses a method and a device for metering a belt conveyor for weighing a continuous balk cargo. The device comprises at least two electronic belt scales and a standard load for verification; the verification of the electronic belt scales comprises the following steps of: simultaneously zeroing the electronic belt scales when the belt conveyor runs at an idle load; adjusting the read numerical values of the electronic belt scales to the same reference value when the belt conveyor runs at a rated load; adding a standard load in one electronic belt scale and calculating a corrected value k; and modifying the verification coefficient K of each electronic belt scale according to K=k*K(primary). By adopting the standard load to replace the conventional substance verification under the rated load, the invention has precise and convenient verification, can find out whether a material exceeds an error range in the conveying process in time and can carry out verification in time.

Description

Be used for belt conveyer metering method and device thereof to weighing continuous balk cargo

Technical field

The present invention relates to be used for belt conveyer metering method and device thereof to weighing continuous balk cargo.

Background technology

Whether just, accurate, the high efficiency of large continuous balk cargo such as coal, ore transaction metering; With the cost accounting that directly influences between business economic benefit and unit, be the problem that enterprises such as port and pier, large-scale thermal power, metallurgy, coal, building materials, chemical industry extremely pay close attention to.At present, the metering of the settlement of transactions of large continuous balk cargo generally adopts the belted electronic balance that is installed on the belt conveyer to realize, although the belted electronic balance product of degree of precision grade is arranged; But at the scene in the actual motion; The accuracy that generally can not for a long time, stably reach manufacturer and promised to undertake often brings worries to both parties, and causes the generation of metering dispute often; Its major influence factors is: the long-time stability of belted electronic balance can not guarantee; Whether material exceeds error range in course of conveying can't in time know, and has only to wait until when next check-verifying period carries out verification to belted electronic balance and could find that suitable hysteresis quality is arranged.And frequent physical goods inspection almost is difficult to accomplish.

Summary of the invention

To the problems referred to above, the invention provides a kind of belt conveyer metering method and device thereof that is used for weighing continuous balk cargo, can find whether material exceeds error range in course of conveying, and verification in time, the accurate measurement rate improves.

The present invention is used for the belt conveyer metering method of weighing continuous balk cargo is achieved in that used metering outfit comprises belted electronic balance and the normal loading that is used for verification; Wherein, Belted electronic balance has two belted electronic balances at least, and the title frame of each belted electronic balance is installed on the belt conveyer respectively; The checking procedure of each belted electronic balance is following:

(1), each belted electronic balance is carried out the integer circle school zero of weighing simultaneously with belt conveyer no-load running;

(2) belt conveyer is moved by rated load, the aggregate-value reading of each belted electronic balance in the identical time period is adjusted to same reference value;

(3) treat that step (2) is accomplished after, by under the rated load running status, in any belted electronic balance, add normal loading at belt conveyer, each belted electronic balance carries out integer circle accumulative total simultaneously weighs, by following formula calculation check coefficient modified value k:

k = \frac{1}{n - 1} (\frac{A}{D - D_{1}} + \frac{A}{D - D_{2}} + . . . + \frac{A}{D - D_{n - 1}})

Wherein, n is the platform number of belted electronic balance, and A is the aggregate-value of normal loading integer circle, and D is the integer circle aggregate-value of the belted electronic balance of loading normal loading, D ₁, D ₂D _N-1Be respectively the integer circle aggregate-value of each belted electronic balance that does not load normal loading;

(4) press K=k * K _FormerRevise the verification COEFFICIENT K of each belted electronic balance;

When weighing, the variable of getting any belted electronic balance is as the metering result; When the error between the variable of any two belted electronic balances exceeds setting value, repeat above-mentioned steps and carry out verification.

Said method step (2) is adjusted to same reference value with the aggregate-value of each belted electronic balance in the identical time period, and essence is that the slope value of revising in each belted electronic balance instrument of weighing makes each belted electronic balance show same reference value; The normal loading of step (3) is carried on the title frame of a certain belted electronic balance, calculate gained k value and be equivalent to the resulting k value of physical goods inspection, so available standards load substitutes physical goods inspection.Each belted electronic balance is weighed simultaneously, each other as comparison other,, can find immediately if difference appears in any two belted electronic balance integer circle total weight values, and verification in time, whether material exceeds error range in course of conveying can in time know; Because this method is online carrying out under the rated load of ordinary production, can substitute traditional physical goods inspection, thereby verification is very convenient, can carry out at any time.

Meter is got the said reference value of step (2) for ease, and this reference value is the operation integer circle aggregate-value of belt conveyer by any belted electronic balance under the rated load running status.

For the convenient normal loading that loads in checking procedure, on the above-mentioned belted electronic balance normal loading loading system is housed, the normal loading of step (3) is loaded by loading system.

Data processing is accomplished timely verification for ease, and it also comprises a computing machine that is used for data processing, and the data processing of step (3) and step (4) is accomplished by computing machine; Verification alarm program also is housed in the said computing machine, and the variable of in metering process, getting two belted electronic balances compares, and when the error between the variable of any two belted electronic balances exceeds setting value, sends alarm signal.

The present invention realizes the device of said method, comprises belted electronic balance, normal loading and loading system thereof, and said belted electronic balance has two at least, and the title frame of each belted electronic balance is installed on the belt conveyer respectively.

It also comprises a computing machine that is used for data processing; Verification alarm program is housed in the said computing machine; The variable of in metering process, getting each belted electronic balance compares, and when the error between the variable of any two belted electronic balances exceeds setting value, sends alarm signal.

The present invention is through selecting at least two belted electronic balances for use, utilize two at least the variable error of belted electronic balance come to find in time whether material exceeds error range in course of conveying so that verification in time.The on-line testing method is employed under the rated load and compares with belted electronic balance that has loaded normal loading and the belted electronic balance integer circle aggregate-value that the end loads normal loading in addition; Can substitute traditional physical goods inspection; Verification was both accurate; Convenient again, can utilize computer control to realize long-range verification.

Description of drawings

Fig. 1 is a WT-MSR fundamental diagram of the present invention.

Fig. 2 is the logic block-diagram of checking routine of the present invention.

Fig. 3 is the logic block-diagram of verification alarm program of the present invention.

Embodiment

WT-MSR of the present invention comprises at least two belted electronic balances, an industrial control computer; Two belted electronic balances have been used in the example as shown in Figure 1; The

title frame

11,13 of two belted electronic balances segment distance of being separated by is installed on the belt conveyer respectively; Wherein, 6, two belted electronic balance instrument of normal loading and loading system thereof 3,4 are installed on the title frame 11 of a belted electronic balance has signal wire to link to each other with industrial control computer 2, and loading system 6 remote control programs are housed in the industrial control computer 2.

In order to improve measuring accuracy; Measuring section 7 uses high precision carrying roller group in the middle of the belt conveyer; And the common carrying roller group of laser collimator 8, two

other parts

1,9 employings is housed, the

title frame

11,13 of two belted electronic balances is installed in middle measuring section 7; The conveyor surface of middle measuring section 7 is adjusted at same conveyor surface with laser collimator 8, and speed measuring device 12 is contained in title frame 11, between 13.

The belted electronic balance verification is controlled by industrial control computer, and its program is as shown in Figure 2:

(2) belt conveyer is moved by rated load, the operation integer circle aggregate-value that industrial control computer reads a belted electronic balance is a reference value, and the operation same integer circle aggregate-value reading of other belted electronic balance is adjusted to this reference value;

(3) treat that step (2) is accomplished after; Press under the rated load running status at belt conveyer; Industrial control computer sends instruction start-up loading system; In a belted electronic balance, add normal loading, simultaneously each belted electronic balance carried out integer circle accumulative total simultaneously and weigh, press following formula calculation check coefficient modified value k:

k = \frac{1}{n - 1} (\frac{A}{D - D_{1}} + \frac{A}{D - D_{2}} + . . . + \frac{A}{D - D_{n - 1}})

Wherein, n is the platform number of belted electronic balance, and A is the aggregate-value of normal loading accumulative total integer circle, and its computing formula is the girth of A=(weight of normal loading/effective weighing section length) * belt, and D is the integer circle aggregate-value of the belted electronic balance of loading normal loading, D ₁, D ₂D _N-1Be respectively the integer circle aggregate-value of each belted electronic balance that does not load normal loading;

(4) press K=k * K _FormerRevise the verification COEFFICIENT K of each belted electronic balance, wherein, K _FormerVerification coefficient for each belted electronic balance before revising.

When weighing, industrial control computer is got the variable of any belted electronic balance as the metering result.

In metering process; Industrial control computer moves verification alarm program simultaneously, and is as shown in Figure 3, when the error between the variable of any two belted electronic balances exceeds given setting value; Show difference; Send alarm signal, start checking routine simultaneously, repeat above-mentioned checking procedure and carry out verification.

Above-mentioned four checking procedures also can rely on manual completion.

Claims

1. be used for belt conveyer metering method to weighing continuous balk cargo; It is characterized in that used metering outfit comprises belted electronic balance and the normal loading that is used for verification; Wherein, belted electronic balance has two belted electronic balances at least, and the title frame of each belted electronic balance is installed on the belt conveyer respectively; The checking procedure of each belted electronic balance is following:

k = \frac{1}{n - 1} (\frac{A}{D - D_{1}} + \frac{A}{D - D_{2}} + \cdot \cdot \cdot + \frac{A}{D - D_{n - 1}})

Wherein, n is the platform number of belted electronic balance, and A is the aggregate-value of normal loading accumulative total integer circle, and D is the integer circle aggregate-value of the belted electronic balance of loading normal loading, D ₁, D ₂D _N-1Be respectively the integer circle aggregate-value of each belted electronic balance that does not load normal loading;

(4) press K=k * K _FormerRevise the verification COEFFICIENT K of each belted electronic balance, wherein, K _FormerVerification coefficient for each belted electronic balance before revising;

2. the belt conveyer metering method that is used for weighing continuous balk cargo according to claim 1 is characterized in that the said reference value of step (2) is the operation integer circle aggregate-value of belt conveyer by any belted electronic balance under the rated load running status.

3. the belt conveyer metering method that is used for weighing continuous balk cargo according to claim 1 and 2 is characterized in that on the belted electronic balance normal loading loading system being housed, and the normal loading of step (3) is loaded by loading system.

4. the belt conveyer metering method that is used for weighing continuous balk cargo according to claim 3 is characterized in that it also comprises a computing machine that is used for data processing, and the data processing of step (3) and step (4) is accomplished by computing machine; Verification alarm program also is housed in the said computing machine, and the variable of in metering process, getting each belted electronic balance compares, and when the error between the variable of any two belted electronic balances exceeds setting value, sends alarm signal.

5. a device of realizing the said method of claim 1 comprises belted electronic balance, normal loading and loading system thereof, it is characterized in that belted electronic balance has two at least, and the title frame of each belted electronic balance is installed on the belt conveyer respectively.

6. device according to claim 5; It is characterized in that it also comprises a computing machine that is used for data processing; Verification alarm program is housed in the said computing machine; The variable of in metering process, getting each belted electronic balance compares, and when the error between the variable of any two belted electronic balances exceeds setting value, sends alarm signal.