CN1271089A - Electronically weighing method and equipment for the accuracy calibration of coal feeding machine - Google Patents
Electronically weighing method and equipment for the accuracy calibration of coal feeding machine Download PDFInfo
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- CN1271089A CN1271089A CN 99113647 CN99113647A CN1271089A CN 1271089 A CN1271089 A CN 1271089A CN 99113647 CN99113647 CN 99113647 CN 99113647 A CN99113647 A CN 99113647A CN 1271089 A CN1271089 A CN 1271089A
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Abstract
With counter balance of certain weight and by using calibration probe to measure the average time of reflecting paper stuck onto the belt from one end of the weighing idler to the other end, the accuracy of coal feeding machine is obtained through the measurement with accuracy calibrating instrument comprising input shaping circuit, microprocessor, memory, decoding drive circuit, display circuit and keyboard and calculation of coal feeding rate based on certain formula. The present invention is suitable for accracy calibration for coal eeding machine in various heat power plant as well as material feeding machine in cement and other industry. By means of replacing calibration with practical object, the present invention can make coal feeding machine operate in optimal state.
Description
The present invention relates to a kind of electronic weighing type coal feeder precision checking method and apparatus, it can be used for the feeder of fuel-burning power plant and the feeding machine of other industries such as cement and chemical industry.
In the fuel-burning power plant, boiler turbine and turbodynamo are called three big main frames.And feeder is a very important ingredient of steam generator system, be with the micro-processor controlled electronic weighing type coal feeder can be by the central control room requirement, accurately coal is sent into material grinder, therefore it is not only well behaved regulating device, it also is reliable coal consumption measuring apparatus, guarantee the feeder precision, except making the feeder control system, outside weighing system and governing system are in shape, also just degree of certainty and demarcation also must make two weighing carrier rollers and weigh the roller adjustment in a straight line, and its error can not surpass ± 0.05mm, belt will be strained, can not skid, in the running, three rollers must rotate.That is to say that it is a lot of to influence the feeder factors of accuracy, and apparatus factor is arranged, human factor is also arranged.Just because of this, a lot of users have proposed such problem, after feeder is debugged, an easy method can be provided, can differentiate feeder has adjusted to and can guarantee high-precision kilter, at present, the precision of feeder does not have additive method and equipment except materials calibration.And the both time-consuming effort of materials calibration can only be used once in a while, can not use always, especially at the power plant scene, can be described as sometimes and can't carry out.
The purpose of this invention is to provide a kind of complete alternative materials calibration, operate very easy again electronic weighing type coal feeder precision checking method and apparatus.
Method provided by the present invention may further comprise the steps:
1, keep not having coal on the electronic weighing type coal feeder belt,
2, on the feeder belt, post 2～4 reflective sheetings by equipartition principle;
3, step up at feeder left and right sides Ding Du two fixed degree probes be housed respectively, and with the verification that is equipped with microcomputer
Equipment connects;
4, hang up degree of the deciding counterweight of 34.70 kilograms or other weight, start feeder, make it by certain coal supply
The rate operation treats that feeder operates steadily, and the beginning verification is to degree of the deciding counterweight of other weight, then
Need to begin to import corresponding counterweight weight by the acknowledgement key on the calibration equipment in back 20 seconds in verification;
5, calibration equipment begins to measure reflective sheeting and steps up two fixed degree probes by being contained in feeder left and right sides Ding Du
Time, continuous coverage 8 times, to 8 time values by the calibration equipment value of averaging Δ t calculate, ordering, ask for behind the absolute value of maximum time deviation divided by the percentage value that obtains the maximum time deviation averaging time, maximum time deviation | t|max=|t-Δ t|max ÷ Δ t * 100%; 6, calculate coal supply rate and demonstration by given computing formula: the coal supply rate (ton/hour)=
To be reflective sheeting go to the other end from an end of weighing carrier roller to Δ t measures averaging time eight times.
For the above-mentioned custom-designed calibration equipment of feeder precision checking method is a tester that is equipped with microcomputer, it comprises and is contained in the two fixed degree probes that feeder left and right sides Ding Du steps up, be used for receiving the input shaper circuit of degree of deciding probe signal, and be used for time of recording and calculate maximum time deviation and the chip microprocessor of coal supply rate, storer, decoder driver circuit, display circuit and keyboard.
Optimum implementation of the present invention is described further in conjunction with the accompanying drawings.
Fig. 1 is an electronic weighing type coal feeder check system structural representation;
Fig. 2 is an electronic weighing type coal feeder precision checking system schematic;
Fig. 3 is an electronic weighing type coal feeder precision checking instrument system block diagram;
Fig. 4 is an electronic weighing type coal feeder precision checking instrument circuit connection diagram;
Fig. 5 is a main program block diagram of the present invention.
By Fig. 1,2,3, shown in 4, the solution of the present invention is: hang up degree of deciding counterweight 8 and post 2～4 reflective sheetings 7 by equipartition principle on the electronic weighing type coal feeder 1 of no coal on feeder belt 6, step up at feeder 1 left and right sides Ding Du two fixed degree probes 3 are housed respectively, 4, and be connected with the tester 5 that is equipped with microcomputer, fixed degree is popped one's head in reflective photoelectric sensor, the input shaper circuit is by the Amphrnol connector, light every, 40,106 six Schmidt triggers are formed, microprocessor adopts 8031 chip microprocessors, storer is 27324KBEPROM and 7,4LS,373 eight D-latchs, they constitute the major part of tester, and decoding drives and display circuit is latched/deciphers/driver for seven sections by CC4511 BCD-, eight sections common cathode charactrons of LDD880 LED display, 40,106 six Schmidt triggers, UIL 2003A seven road Darlington drivers are formed.Like this, start feeder 1, it is moved by certain coal supply rate under the control of computer control device 2, treat that feeder operates steadily, the beginning verification, surely spend counterweight can with 34.70 kilograms with other non-34.70 kilograms counterweights, if the standard test weight that uses when spending surely is non-34.70 kilograms, then need to begin in back 20 seconds by the acknowledgement key on the calibration equipment in verification, using then increases or reduces key, obtains after the required numeral again by acknowledgement key, the precision checking instrument will be according to the digital computation coal supply rate of input, guarantee the precision of verification,, then need not change if standard test weight is 34.70 kilograms.The present invention adopts eight sections common cathode charactrons of five LED to carry out the dynamic scan demonstration, first charactron be display digit 0-9 successively, when showing 0-7, the each reflective sheeting of back group of four figures pipe numeral is by fixed degree probe 3,4 promptly during two reflective photoelectric sensors, the time value that the precision checking instrument records, numerical value is accurate to Millisecond, like this, repeated measurement 8 times, the time value that records input microprocessor is to the mean value of the time quantum that records for 8 times, ordering, maximum deviation is calculated, when first charactron shows 8, back group of four figures pipe has shown the percentage value of maximum time deviation, according to the formula that obtains by theoretical derivation and actual verification: the coal supply rate (ton/hour)=
To be reflective sheeting go to the other end from an end of weighing carrier roller to Δ t measures averaging time eight times.
34.70 kilogram is a standard test weight, also can set by actual weight by keyboard.
When first charactron showed 9, back group of four figures pipe then showed measured coal supply rate.Utilize degree of deciding probe measurement Δ t exactly from the task of the above precision checking instrument, and calculate the coal supply rate, its error is mainly from Δ t measuring error.By maximum coal supply rate is 80 tons/hour, and according to above-mentioned formula, then minimum delta t is 3123 milliseconds, and the timing least unit is a millisecond in the tester, so measuring accuracy is about 0.03%.At present, in the actual use of feeder, when measuring coal supply rate and actual coal supply rate error in ± 0.5% the time, illustrate that feeder operates in perfect condition, when error surpassed ± 0.5%, feeder should reexamine machinery and electric part, and demarcates again and degree of deciding.Maximum time, the percentage value of deviation only was reference value,, whether sideslip or the not reference of both sides asymmetric judgement whether smooth as belt.
For realizing method of the present invention, adopt the mode of subroutine call, flow chart is seen Fig. 5.
Because the used precision checking instrument of the present invention has adopted chip microprocessor control, be applicable to various weighing coal feeder precision checkings, by setting software parameter and changing the internal arithmetic formula, also applicable to the precision checking of the feeder of the fuel-burning power plant of different size, different model and the feeding machine of other industries such as cement and chemical industry etc.The present invention can not only replace materials calibration, saves a large amount of material resources, financial resources, and can guarantee that feeder moves in the best condition, reduces power plant's coal consumption greatly, has really brought into play the effect of projection electronic weighing formula feeder.
Claims (7)
1, a kind of electronic weighing type coal feeder precision checking method is characterized in that its method may further comprise the steps:
(1), keep the belt (6) of electronic weighing type coal feeder (1) to go up no coal,
(2), on feeder belt (6), post 2～4 reflective sheetings (7) by equipartition principle;
(3), step up at feeder left and right sides Ding Du two fixed degree probes (3), (4) be housed respectively, and be connected with the tester that is equipped with microcomputer;
(4), hang up degree of the deciding counterweight of 34.70 kilograms or other weight, start feeder, make it by one
Decide the operation of coal supply rate, treat that feeder operates steadily, the beginning verification is to the degree of deciding of other weight
The enamel sign indicating number then needs to begin in back 20 seconds corresponding by the input of the acknowledgement key on the calibration equipment in verification
Enamel code weight amount;
(5), calibration equipment begins to measure reflective sheeting and steps up two fixed degree by being contained in feeder left and right sides Ding Du
The probe time, continuous coverage 8 times, to 8 time values by the calibration equipment value of averaging
Δ t calculates, ordering, asks for behind the absolute value of maximum time deviation divided by obtaining averaging time
The percentage value of big time deviation, maximum time deviation | t|max=|t-Δ t|max
÷Δt×100％；
(6), calculate coal supply rate and demonstration by given computing formula: the coal supply rate (ton/hour)=
To be reflective sheeting go to the other end from an end of weighing carrier roller to Δ t measures averaging time eight times.
2, the described method of a kind of use claim 1 and custom-designed equipment, it is characterized in that, for the custom-designed equipment of its method is an electronic weighing type coal feeder precision checking instrument (5), it comprises two fixed degree probe (3), (4) that are contained in that feeder left and right sides Ding Du steps up, be used for receiving the input shaper circuit of degree of deciding probe signal, and be used for time of recording and calculate maximum time deviation and the chip microprocessor of coal supply rate, storer, decoder driver circuit, display circuit and keyboard.
3, equipment according to claim 2 is characterized in that, described fixed degree probe (3), (4) are reflective photoelectric sensor.
4, equipment according to claim 2 is characterized in that, described input shaper circuit is made up of every, 40,106 six Schmidt triggers Amphrnol connector, light.
5, equipment according to claim 2 is characterized in that, described chip microprocessor is 8031 chip microprocessors.
6, equipment according to claim 2 is characterized in that, described storer is made up of 27324KBEPROM and 7,4LS,373 eight D-latchs.
7, equipment according to claim 2, it is characterized in that, described decoding driving and display circuit by seven sections of CC4511 BCD-latch/decipher/driver, eight sections common cathode charactrons of LDD880 LED display, 40,106 six Schmidt triggers, UIL 2003A seven road Darlington drivers form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99113647 CN1109882C (en) | 1999-04-20 | 1999-04-20 | Electronically weighing method and equipment for the accuracy calibration of coal feeding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99113647 CN1109882C (en) | 1999-04-20 | 1999-04-20 | Electronically weighing method and equipment for the accuracy calibration of coal feeding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1271089A true CN1271089A (en) | 2000-10-25 |
| CN1109882C CN1109882C (en) | 2003-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99113647 Expired - Fee Related CN1109882C (en) | 1999-04-20 | 1999-04-20 | Electronically weighing method and equipment for the accuracy calibration of coal feeding machine |
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| CN (1) | CN1109882C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089565B (en) * | 2006-06-13 | 2010-09-29 | 上海新拓电力设备有限公司 | Pairing device and method for degree probe of feeder |
| CN102169011A (en) * | 2010-12-31 | 2011-08-31 | 上海发电设备成套设计研究院 | Method of hanging weight calibration and error automatic correction for increasing metering precision of electric weighing coal feeder |
| CN103235520B (en) * | 2013-05-23 | 2015-05-20 | 山东博硕电子有限公司 | Automatic blending analog control device and control method |
| CN104635606A (en) * | 2014-12-11 | 2015-05-20 | 南京梅山冶金发展有限公司 | Transmission control method of leveling line weighing data |
| CN105806455A (en) * | 2014-12-30 | 2016-07-27 | 华润电力（菏泽）有限公司 | Method and system for metering coal consumption of thermal power plant |
| CN112161690A (en) * | 2020-09-17 | 2021-01-01 | 无锡利信能源科技有限公司 | Remote automatic unmanned calibration method for coal feeder |
-
1999
- 1999-04-20 CN CN 99113647 patent/CN1109882C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089565B (en) * | 2006-06-13 | 2010-09-29 | 上海新拓电力设备有限公司 | Pairing device and method for degree probe of feeder |
| CN102169011A (en) * | 2010-12-31 | 2011-08-31 | 上海发电设备成套设计研究院 | Method of hanging weight calibration and error automatic correction for increasing metering precision of electric weighing coal feeder |
| CN103235520B (en) * | 2013-05-23 | 2015-05-20 | 山东博硕电子有限公司 | Automatic blending analog control device and control method |
| CN104635606A (en) * | 2014-12-11 | 2015-05-20 | 南京梅山冶金发展有限公司 | Transmission control method of leveling line weighing data |
| CN105806455A (en) * | 2014-12-30 | 2016-07-27 | 华润电力（菏泽）有限公司 | Method and system for metering coal consumption of thermal power plant |
| CN105806455B (en) * | 2014-12-30 | 2018-06-19 | 华润电力（菏泽）有限公司 | A kind of metering method and system of thermal power plant coal consumption |
| CN112161690A (en) * | 2020-09-17 | 2021-01-01 | 无锡利信能源科技有限公司 | Remote automatic unmanned calibration method for coal feeder |
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| Publication number | Publication date |
|---|---|
| CN1109882C (en) | 2003-05-28 |
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Granted publication date: 20030528 Termination date: 20120420 |