CN202116001U - Bulk conveying system - Google Patents

Bulk conveying system Download PDF

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Publication number
CN202116001U
CN202116001U CN2011201313946U CN201120131394U CN202116001U CN 202116001 U CN202116001 U CN 202116001U CN 2011201313946 U CN2011201313946 U CN 2011201313946U CN 201120131394 U CN201120131394 U CN 201120131394U CN 202116001 U CN202116001 U CN 202116001U
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CN
China
Prior art keywords
bulk cargo
coal
delivery system
control system
bulk
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Expired - Fee Related
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CN2011201313946U
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Chinese (zh)
Inventor
金义良
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金义良
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Priority to CN2011201313946U priority Critical patent/CN202116001U/en
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Publication of CN202116001U publication Critical patent/CN202116001U/en
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Abstract

The utility model relates to a bulk conveying system, which comprises a belt conveyor, a bulk flow detection device (1) and a motor speed regulating device (2). The bulk flow detection device (1) and the motor speed regulating device (2) are mounted on the belt conveyor, the bulk flow detection device is connected with a central control system and capable of measuring flow rate of bulk conveyed on the belt conveyor, outputting bulk flow signals and sending the signals to the central control system, and the motor speed regulating device is connected with both the central control system and a motor (4) driving the belt conveyor, and is used for regulating output power of the motor driving the belt conveyor according to control signals sent from the central control system so as to lead the output power of the motor to be matched with actual bulk flow detected by the bulk flow detection device. The output power of the motor is matched with the bulk flow of the belt conveyor, energy resources are saved, and the bulk conveying system is simple in structure and low in cost.

Description

The bulk cargo delivery system
Technical field
The utility model relates to the especially delivery system of bulk cargo of a kind of solid material, particularly relates to a kind of coal-fired power plant coal handling system.
Background technology
In the large and medium-sized coal-fired station of China's construction,, mainly be exactly belt conveyer from receiving handler to coal yard and the defeated used equipment that transports of coal of boiler run coal bin.Because coal yard is far away apart from coal bunker, fire coal will pass through multistage conveying just can send into coal bunker, and according to the difference of each enterprise's coal blending mode, coal conveyer belt quantity is all more, and transmission distance is also long.Coal conveyer belt generally all adopts power frequency operation, and no matter the coal conveying belt amount is big or small, is the constant speed operation, causes the station-service waste of electric quantity.And in the actual shipment process, receiving the influence of various factors such as personnel operation, equipment start-stop, breakdown of equipment, the efficient of last coal amount/belt time of run has been wasted mass energy often less than 50% of design rating.
The utility model content
The purpose of the utility model is to provide a kind of solid material (especially bulk cargo, like fire coal) delivery system, so as to saves energy.
Bulk cargo delivery system according to the utility model; Comprise belt conveyer; It is characterized in that: this bulk cargo delivery system also comprises bulk cargo flow detector and the motor speed control device that is installed on the said belt conveyer; Said bulk cargo flow detector links to each other with master control system, and this bulk cargo flow detector can be measured the bulk cargo flow of on belt conveyer, carrying in real time, and the output bulk cargo flows signal, sends into master control system; Motor speed control device is connected with master control system on the one hand; Link to each other with the electrical motor that drives belt conveyer on the other hand; Regulate the horsepower output of the electrical motor that drives belt conveyer with the control signal that is sent according to master control system, the actual bulk cargo flow that makes output power of motor and bulk cargo flow detector record is complementary.
Preferably, motor speed control device is designed to frequency converter.
Preferably, said bulk cargo flow detector is designed to the bulk cargo layer height measurement mechanism that is installed on the said belt conveyer, and the bulk cargo layer height that records through said bulk cargo layer height measurement mechanism comes conversion Calculation to obtain the bulk cargo flow.The operation simple in structure, reliable, easy of this bulk cargo flow detector, cost are low, and can stably measure the bulk cargo stream size that constantly changes on the belt in real time.
Preferably; Said bulk cargo layer height measurement mechanism comprises the support that is installed on the belt conveyer; The swing arm and the transfer device of band rotating shaft are installed on this support; The bottom of said swing arm is a distance above the belt of belt conveyer, and said transfer device is used for the angular transposition of rotating shaft is converted into direct current signal, is delivered to master control system.
Preferably, said bulk cargo delivery system is designed for coal-fired power plant and carries fire coal, and wherein, said bulk cargo is coal-fired, and master control system is Power Plant DCS System (Distributed Control System: dcs).
When bulk cargo (like Coal-fired capacity) is low, be complementary with the coal amount, the power of coal conveyer belt motor output is less, thus the delivery speed of coal conveyer belt is less.The situation of coming the coal chute blockage in a large number appears when preventing that the belt delivery speed is too small, preferably, and except the chute blockage switch is installed; The bulk cargo delivery system comprises that also the bulk cargo that is installed on its material-falling hopper stops up monitoring device; Said bulk cargo stops up monitoring device and links to each other with master control system, when chute blockage occurring, when master control system is sent the chute blockage signal; Master control system is sent control signal to frequency converter, through regulating speed that frequency converter increases coal conveyer belt to guarantee not chute blockage.Said bulk cargo stops up monitoring device and is preferably the infrared rays survey device.
The bulk cargo delivery system that the utility model provides can realize that the horsepower output of electrical motor and the belt bulk cargo flow of belt conveyer are complementary, and practiced thrift the energy, and equipment are simple, cost is low.
Chute blockage problem when in addition, the utility model has also solved coal conveying belt low speed.
Description of drawings
Embodiment to the utility model is described in detail below in conjunction with accompanying drawing, with further feature and the advantage that provides the utility model.In the accompanying drawing:
Fig. 1 illustrates the control principle figure by the coal handling system of an embodiment of the utility model;
Fig. 2 illustrates the structural principle scheme drawing of coal flow detector of the coal handling system of an embodiment of the utility model.
The specific embodiment
As shown in Figure 1, provide the utility model and be applied to the control principle figure that the coal-fired coal handling system in power plant is used to carry coal-fired embodiment.
By the coal-fired coal handling system in the power plant of this embodiment, comprise coal conveyer belts, material-falling hopper etc.This coal handling system also comprises coal flow detector 1 and the frequency converter 2 that is installed on the said coal conveyer belts; This coal flow detector 1 links to each other with Power Plant DCS System 3; This coal flow detector 1 can be measured the coal flow of on coal conveyer belts, carrying in real time, and the output coal flows signal, sends into Power Plant DCS System 3; Frequency converter 2 is connected with Power Plant DCS System 3 on the one hand; Link to each other with the electrical motor 4 that drives coal conveyer belts on the other hand; Regulate the output power of motor of driving belt machine with the control signal that is sent according to Power Plant DCS System, the actual coal amount that makes output power of motor and coal flow detector record is complementary.
In the utility model, replace frequency converter 2 also can adopt the motor speed control device of other types.
In one embodiment, the coal flow detector is designed to the coal seam height measuring device that is installed on the said coal conveyer belts.When the size variation of coal stream on the coal conveyer belts, its coal seam height also changes, and then detects the height in coal seam through said coal seam height measuring device and conversion Calculation obtains the coal flow.
Fig. 2 has provided the structural principle scheme drawing by a kind of coal flow detector of the utility model coal handling system of an embodiment.A support 13 is installed on coal conveyer belts; A swing arm 12 that has rotating shaft is installed on support 13; Its bottom is a distance belt 11 of coal conveyer belts (preferably a little more than) above the belt 11 of coal conveyer belts; When the stream of the coal on coal conveyer belts size variation, its coal seam height also changes corresponding, makes rotating shaft produce angular transposition thereby drive swing arm 12; Convert the angular transposition of swing arm into direct current signal through transfer device 14 then and be delivered to Power Plant DCS System, to confirm coal stream size.
Also can adopt the coal flow detector of other types,, specifically see also paper " structure of modular electronic belt conveyer scale and characteristics ", be published in 2011 the 40th volumes of periodical " weighing apparatus " the 1st phase 51-52 page or leaf like the modular electronic belt conveyer scale; Roller belt conveyer scale, three skill scales or the like for another example.
In another (unshowned) embodiment, the chute blockage monitoring device also is installed, this chute blockage monitoring device is installed on the material-falling hopper of coal handling system.This chute blockage monitoring device links to each other with Power Plant DCS System, when monitoring chute blockage, thereby comes the control motor effectively to prevent chute blockage through regulating the frequency converter revolution.
In the prior art, material-falling hopper generally all is equipped with the chute blockage switch of a protection usefulness, and when in a certain coal position the chute blockage phenomenon taking place, certain belt feeder or all belt feeders quit work.For the vertical distance of coal conveyer belt, the protection of the existing coal conveyer belts in the installation site of this chute blockage monitoring device is low with chute blockage switch present position.Promptly press an embodiment of the utility model,, the chute blockage monitoring device is installed also except the chute blockage switch is installed.Preferably, the chute blockage monitoring device is designed to the infrared rays survey device; Also can be contact monitoring device, turnover plate type monitoring device.
Can obtain the relation of coal flow on the output power of motor that drives coal conveyer belts and the coal conveyer belts belt through experiment repeatedly.For example, when coal-feeding quantity is 1600 tons/hour, belt width is 1.4 meters; When belt speed was 2.5 meter per seconds, the coal seam height was represented with H, coal flow and coal seam height correlation; The H of belt electrical motor revolution=(2.5/0.167) then; Wherein, incidence coefficient is 0.167 (here for for example), the parameter of this coefficient and belt, relevant like belt width etc.Through adopting the technical scheme of the utility model, the efficient of coal amount/belt time of run can reach more than 80% of design rating on this coal handling system.
The technical scheme of the utility model also can be applied to the conveying occasion of other bulk cargo except that coal-fired, wherein, adopts belt conveyer to carry the bulk cargo such as stone, sand, carries such as the building stones in mine, and perhaps the sandstone of sandstone field are carried.For the utility model importantly: can measure the bulk cargo flow of on belt conveyer, carrying in real time through the bulk cargo flow detector; Regulate the horsepower output of the electrical motor that drives belt conveyer according to this; The actual bulk cargo flow that makes output power of motor and bulk cargo flow detector record is complementary, thereby improves the efficient of bulk cargo amount/belt time of run.

Claims (7)

1. bulk cargo delivery system; Comprise belt conveyer; It is characterized in that: said bulk cargo delivery system also comprises bulk cargo flow detector (1) and the motor speed control device that is installed on the said belt conveyer; Said bulk cargo flow detector links to each other with master control system, and this bulk cargo flow detector can be measured the bulk cargo flow of on belt conveyer, carrying in real time, and the output bulk cargo flows signal, sends into master control system; Said motor speed control device is connected with master control system on the one hand; Link to each other with the electrical motor (4) that drives belt conveyer on the other hand; Regulate the horsepower output of the electrical motor (4) that drives belt conveyer with the control signal that is sent according to master control system, the actual bulk cargo flow that makes output power of motor and bulk cargo flow detector record is complementary.
2. bulk cargo delivery system according to claim 1 is characterized in that, said motor speed control device is designed to frequency converter (2).
3. bulk cargo delivery system according to claim 1 is characterized in that, said bulk cargo delivery system comprises that also bulk cargo stops up monitoring device, and said bulk cargo stops up monitoring device and links to each other with master control system.
4. bulk cargo delivery system according to claim 3 is characterized in that: said bulk cargo stops up monitoring device and is designed to the infrared rays survey device.
5. bulk cargo delivery system according to claim 1; It is characterized in that: said bulk cargo flow detector is designed to the bulk cargo layer height measurement mechanism that is installed on the said belt conveyer, and the bulk cargo layer height that records through bulk cargo layer height measurement mechanism comes conversion Calculation to obtain the bulk cargo flow.
6. bulk cargo delivery system according to claim 5; It is characterized in that: said bulk cargo layer height measurement mechanism comprises the support (13) that is installed on the belt conveyer; The swing arm (12) and the transfer device (14) of band rotating shaft are installed on this support; The bottom of said swing arm is in a distance, belt (11) top of belt conveyer, and said transfer device (14) is used for the angular transposition of rotating shaft is converted into direct current signal, is delivered to master control system.
7. according to each described bulk cargo delivery system in the claim 1 to 6, it is characterized in that said bulk cargo delivery system is designed for coal-fired power plant and carries fire coal, wherein, said bulk cargo is coal-fired, and said master control system is Power Plant DCS System (3).
CN2011201313946U 2011-04-29 2011-04-29 Bulk conveying system Expired - Fee Related CN202116001U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201313946U CN202116001U (en) 2011-04-29 2011-04-29 Bulk conveying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201313946U CN202116001U (en) 2011-04-29 2011-04-29 Bulk conveying system

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CN202116001U true CN202116001U (en) 2012-01-18

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102756904A (en) * 2011-04-29 2012-10-31 金义良 Method and system for conveying bulk cargo
CN103466284A (en) * 2013-09-16 2013-12-25 中国神华能源股份有限公司 Belt conveyor centralized control method and system
CN105858132A (en) * 2016-05-12 2016-08-17 天地(常州)自动化股份有限公司 Coal flow conveying system with conveyor load distribution detection function and energy-saving control method of coal flow conveying system
CN109607103A (en) * 2018-11-28 2019-04-12 武汉钢铁有限公司 Heap mass flow online test method, device and its application are dissipated on belt conveyor
CN112320262A (en) * 2020-10-16 2021-02-05 大同煤矿集团有限责任公司 Overload early warning method for coal mine coal flow main conveying device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102756904A (en) * 2011-04-29 2012-10-31 金义良 Method and system for conveying bulk cargo
CN102756904B (en) * 2011-04-29 2015-09-09 金义良 Bulk material method and system
CN103466284A (en) * 2013-09-16 2013-12-25 中国神华能源股份有限公司 Belt conveyor centralized control method and system
CN103466284B (en) * 2013-09-16 2016-02-17 中国神华能源股份有限公司 Sealing-tape machine centralized control method and system
CN105858132A (en) * 2016-05-12 2016-08-17 天地(常州)自动化股份有限公司 Coal flow conveying system with conveyor load distribution detection function and energy-saving control method of coal flow conveying system
CN109607103A (en) * 2018-11-28 2019-04-12 武汉钢铁有限公司 Heap mass flow online test method, device and its application are dissipated on belt conveyor
CN112320262A (en) * 2020-10-16 2021-02-05 大同煤矿集团有限责任公司 Overload early warning method for coal mine coal flow main conveying device

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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120118

Termination date: 20170429