CN102756927A - Material level balance control method and system - Google Patents
Material level balance control method and system Download PDFInfo
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- CN102756927A CN102756927A CN2012102630181A CN201210263018A CN102756927A CN 102756927 A CN102756927 A CN 102756927A CN 2012102630181 A CN2012102630181 A CN 2012102630181A CN 201210263018 A CN201210263018 A CN 201210263018A CN 102756927 A CN102756927 A CN 102756927A
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Abstract
The invention provides a material level balance control method and system for silos. The method comprises the following steps: starting one of a plurality of belt conveyors and all or part of feeding machines corresponding to the belt conveyor; utilizing a belt weigher on the started belt conveyor to measure the material flow rate on the belt conveyor; and stopping the started belt conveyor and the feeding machines corresponding to the belt conveyor according to the measurement result of the material flow rate or when the running time of the belt conveyor exceeds a first preset time, and starting another belt conveyor in the plurality of belt conveyors, which is different from the belt conveyor in use, and all or part of feeding machines corresponding to the another belt conveyor. Through the above technical scheme, the belt weighers are used for detecting the material flow rate, and whether the belt conveyors are to be switched or not is determined according to the detected material flow rate, so that the material level can be timely adjusted when the material levels in the silos are unbalanced, and the safety and stability in the whole discharge process are ensured while the operation is not influenced.
Description
Technical field
The present invention relates to material level balance control system and method, relate in particular to a kind of material level balance control system and method for large-scale coal storage silo.
Background technology
The harbour is the aortic hinge of communications and transportation, and in order to realize securely and effectively shipping functions of pivoting at the harbour, storage, transportation and technics of shipment specialized, automation all are absolutely necessary.According to the characteristic of material, the scale of shipping and the requirement of the aspects such as efficient that the material storage is transported, adopted various materials memory scheduling scheme to come shipping is coordinated in the current port traffic.Such as, adopt the mode of silo storage for materials such as grain, cement more, and to modes that adopt the open storages storage such as coal ores more.
For fortune coal harbour mouth; Open storage storage meeting causes the material of very big pollution and stacking to receive the influence of weather easily to environment; And adopting general sealing stockyard or storehouse storage, the coal ton-kilometerage volume can receive very big restriction, and the efficient of whole storage and transportation is not high.Based on above reason, adopting cylindrical silo to carry out large-scale coal storage at the harbour will be more satisfactory selection.
The silo coal storage adopts in power plant and colliery to some extent; But the colliery is short with power plant's coal storage time, storage content is little, technological process is single, less demanding to efficient, categories of coal is single and do not relate to being mixed of different coals; And the high efficiency exactly that the harbour coal storage is paid close attention to most, many kinds, the coal that is mixed, high-throughput and the long time of storing up; Therefore; If will realize the scheme of the extensive coal storage of silo at the harbour, must on structure, function and method of application, carry out suitable transformation and improvement to existing coal storage silo.
Especially, for the large-scale silo of the required use of extensive storage, require the level cross-sectionn of silo very big; Like this; When leaking coal at the bottom of the storehouse, in the silo through regular meeting whole or local material level energy imbalance appear, and this will cause the coal of some position in the silo to leak on the belt feeder via the feeder at the bottom of the storehouse timely; Cause the long-time accumulation of this part coal, can not be substituted by new coal.The long-term accumulation of coal very easily causes nature, even possibly set off an explosion, and is very dangerous, therefore needs timely the material level in the silo to be carried out balance control.
Summary of the invention
In order better silo to be carried out the material level balance control, the present invention provides a kind of material level balance control method and system.
The invention provides a kind of silo material level balance control method; Wherein this silo bottom is provided with a plurality of feeders that are used for discharging; The below of this silo also is provided with parallel a plurality of belt feeders; Wherein each belt feeder corresponds respectively at least one feeder in said a plurality of feeder, and has at least one belt conveyer scale on each belt feeder, and this method comprises: open a belt feeder and the pairing all or part of feeder of this belt feeder in said a plurality of belt feeder; Utilize the belt conveyer scale on the belt feeder of opening to measure the mass flow on this belt feeder; According to the mass flow result of a measurement or when said belt feeder time of run surpassed for first schedule time; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.
The present invention also provides a kind of silo material level balance control system; Wherein this silo bottom is provided with a plurality of feeders that are used for discharging; The below of this silo also is provided with parallel a plurality of belt feeders; Wherein each belt feeder corresponds respectively at least one feeder in said a plurality of feeder, and this system comprises: a plurality of belt conveyer scales wherein all are provided with a belt conveyer scale on each belt feeder in said a plurality of belt feeders at least; The control unit that is electrically connected with said a plurality of feeders, said a plurality of belt feeders and said a plurality of belt conveyer scale respectively, this control unit is used for: a belt feeder and the pairing all or part of feeder of this belt feeder of opening said a plurality of belt feeders; Reception is from the measured mass flow of the belt conveyer scale of the belt feeder of being opened; According to said mass flow or when said belt feeder time of run surpassed for first schedule time; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.
Pass through technique scheme; Use belt conveyer scale to detect mass flow; And determine whether belt feeder is switched through detected mass flow, like this, can occur timely material level being adjusted under the unbalanced situation by the material level in silo; When not influencing operation, guaranteed the safety and stability of whole discharge process.
Other features and advantages of the present invention will partly specify in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification sheets, is used to explain the present invention with the following specific embodiment, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 shows a kind of exemplary silo scheme drawing;
Fig. 2 shows the silo material level balance control method according to one embodiment of the present invention;
Fig. 3 shows the silo material level balance control method according to another embodiment of the invention;
Fig. 4 shows the silo material level balance control method according to another embodiment of the present invention;
Fig. 5 shows the silo material level balance control system scheme drawing according to one embodiment of the present invention;
Fig. 6 shows the silo material level balance control system scheme drawing according to another embodiment of the invention; And
Fig. 7 shows the silo material level balance control system scheme drawing according to another embodiment of the present invention.
The specific embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention.Should be understood that the specific embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
In silo structure, especially in large-scale silo structure, a plurality of feeders that are used for discharging can be set at the bottom of the storehouse, so that improve maximum unloading performance, and help to realize the material level balance.The quantity and the arrangement form of feeder at the bottom of the storehouse of feeder wherein, can be set according to the factors such as restriction of size, unloading performance demand and the discharge rate of size and shape, feeder at the bottom of the storehouse.
For silo structure with feeder at the bottom of a plurality of storehouses; It can better solve the material level equilibrium problem of silo with respect to the small-sized silo that has only a feeder; But consider the factor such as shape, quality, size of the material of storage; When discharging, may occur various situations (such as since feeder degree of opening deficiency result in blockage etc.), and discharge process is produced the influence that can not estimate, and probably can cause the material overbalance.Based on this, the present invention proposes the method and system that further silo that at the bottom of the storehouse, has a plurality of feeders is carried out the material level balance control.
A kind of exemplary silo has been shown among Fig. 1.Wherein this silo 110 has a plurality of feeders 130 at the bottom of the storehouse, and the material in the silo 110 can pour on the belt feeder 150 through feeder 130, and is transported to assigned address through belt feeder 150.In the present invention; In order to realize that the material level in the silo 110 is detected and controls, also some accessory devices possibly are set, these devices can be used as the part of material balance control system proposed by the invention; Such as level-sensing device 120 and belt conveyer scale 140 etc., hereinafter will be described in detail.
Fig. 2 shows the silo material level balance control method according to one embodiment of the present invention.
As shown in Figure 2, in step 210, utilize a plurality of level-sensing devices to detect the material level in the said silo.
In step 220, adjust at least one the load in said a plurality of feeder according to the detected material level of said a plurality of level-sensing devices.
In this step; The function (such as aviation value) of material level value that can assert material level value or a plurality of specific location of a specific location relevant with feeder can determine the load of this feeder; Therefore; When the value of the function of material level value that detects these one or more specific location or material level value bigger than normal (such as, compare with the aviation value of the material level value of all level-sensing devices in the silo) time, then should reduce the load of this feeder; Otherwise, then should increase the load of this feeder.
In this step; Can at first confirm the simulation material level curved surface in the said silo according to the detected material level of said a plurality of level-sensing devices; Just the material level value according to the ad-hoc location in the detected silo of a plurality of level-sensing devices simulates a curved surface; The ideal form of this curved surface should be consistent with the material surface configuration in the silo, therefore is called simulation material level curved surface.The material level value of any position can be simulated the material level curved surface through this and obtains in the silo like this, and can be further comes at least one the load in said a plurality of feeders is adjusted through the material level value that obtains.
Level-sensing device can setting as much as possible on a large scale, to obtain even more ideal simulation material level curved surface.Also can be preferably (midpoint directly over such as feeder, between two feeders etc.) are provided with level-sensing device at the key point place earlier, under the situation that guarantees certain precision, can practice thrift cost like this.
In a kind of embodiment of replacement, can only level-sensing device be set directly over feeder and make said a plurality of level-sensing device corresponding one by one with said a plurality of feeders.So; Can adjust the load of this feeder according to the level-sensing device directly over the feeder; When the material level value of this level-sensing device is bigger than normal (such as comparing) with the aviation value of material level value of all level-sensing devices in the silo; Then should reduce the load of this feeder, otherwise, the load of this feeder then should be increased.
Preferably, said feeder is the activation feeder.
Corresponding with the method among Fig. 2, in Fig. 5, the present invention also provides the silo material level balance control system according to one embodiment of the present invention, and wherein this silo has a plurality of feeders 130 that are used for discharging (concrete structure can with reference to figure 1) in the bottom.This control system comprises: a plurality of level-sensing devices 120 that are used for detecting the material level in the said silo; The feeder control unit 510 that is electrically connected with said a plurality of level-sensing devices 120 and said a plurality of feeders 130 respectively.Wherein this feeder control unit 510 is used to receive the detected material level from said a plurality of level-sensing devices 120, and adjusts the load of at least one feeder in said a plurality of feeder 130 according to detected material level.
Preferably, said feeder control unit is confirmed the simulation material level curved surface in the said silo according to the detected material level of said a plurality of level-sensing devices, and comes at least one the load in said a plurality of feeders is adjusted according to said simulation material level curved surface.
Replacedly, said a plurality of level-sensing devices are corresponding one by one with said a plurality of feeders, and place respectively corresponding feeder directly over.Said feeder control unit adjusts respectively the load with the corresponding feeder of this level-sensing device according to the detected material level of each level-sensing device in said a plurality of level-sensing devices at least in part; Such as, adjust in conjunction with the aviation value of the material level value of all level-sensing devices in the silo.
Fig. 3 shows the silo material level balance control method according to another embodiment of the invention; Wherein this silo bottom is provided with a plurality of feeders that are used for discharging; The below of this silo also is provided with parallel a plurality of belt feeders, and wherein each belt feeder corresponds respectively at least one feeder in said a plurality of feeder.
As shown in Figure 3, in step 310, open a belt feeder and the pairing all or part of feeder of this belt feeder in said a plurality of belt feeder.
In step 320, utilize a plurality of level-sensing devices to detect the material level in the said silo.
Preferably, said a plurality of level-sensing devices are corresponding one by one with said a plurality of feeders, and place respectively corresponding feeder directly over, to detect the material level at corresponding feeder place respectively.
Preferably, said feeder is the activation feeder.
In step 330; According to the detected material level of said a plurality of level-sensing devices or when said belt feeder time of run surpassed for first schedule time; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.
Preferably, repeated execution of steps 320 and step 330 in said method are to realize continuous detecting and the control to whole discharge process.
In above-mentioned steps 310-330 and repeatedly in execution in step 320 and 330 the process,, then adjust the load of the feeder of current unlatching according to the detected material level of said a plurality of level-sensing devices if opened the pairing whole feeders of a certain belt feeder.The content of the method among this method of adjustment and Fig. 2 is consistent, repeats no more here.
In above-mentioned steps 310-330 and repeatedly in execution in step 320 and 330 the process; If only opened the pairing M of an a certain belt feeder feeder (wherein M is more than or equal to 1 and less than the quantity of the pairing whole feeders of this belt feeder); Then according to the detected material level of said a plurality of level-sensing devices or when said belt feeder time of run surpassed for second schedule time; M the feeder that use that select and M incomplete same feeder of M current unlatching a feeder from the pairing whole feeders of this belt feeder are replaced current unlatching carries out discharging, thereby avoids because certain feeder cuts out the material level overbalance that is caused for a long time.
Corresponding with the method among Fig. 3; In Fig. 6; The present invention also provides the silo material level balance control system according to another embodiment of the invention; Wherein this silo bottom is provided with a plurality of feeders 130 that are used for discharging; The below of this silo also is provided with parallel a plurality of belt feeders 150, and wherein each belt feeder 150 corresponds respectively at least one feeder in said a plurality of feeder 130 (concrete structure can referring to Fig. 1), and this system comprises a plurality of level-sensing devices 120 that are used for detecting the material level in the said silo; The control unit 610 that is electrically connected with said a plurality of level-sensing device 120, said a plurality of feeders 130 and said a plurality of belt feeder 150 respectively.
Wherein, this control unit 610 is used for opening a belt feeder and the pairing all or part of feeder of this belt feeder of said a plurality of belt feeder 150; Reception is from the detected material level of said a plurality of level-sensing devices 120; According to said a plurality of level-sensing device 120 detected material levels or when said belt feeder 150 time of ruies surpassed for first schedule time; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder 150.
Preferably, said control unit also is used for when having opened the pairing whole feeder of a belt feeder, adjusting the load of the feeder of current unlatching according to the detected material level of said a plurality of level-sensing devices.
Preferably; Said control unit also is used for when only having opened the pairing M of a belt feeder feeder (M is more than or equal to 1 and less than the quantity of the pairing whole feeders of this belt feeder); According to the detected material level of said a plurality of level-sensing devices or when said belt feeder time of run surpassed for second schedule time, M the feeder that uses from the pairing whole feeders of this belt feeder that select and M incomplete same feeder of M current unlatching a feeder to replace current unlatching carries out discharging.
Preferably, said a plurality of level-sensing devices are corresponding one by one with said a plurality of feeders, and place respectively corresponding feeder directly over, to detect the material level at corresponding feeder place respectively.
Preferably, said feeder is the activation feeder.
Fig. 4 shows the silo material level balance control method according to another embodiment of the present invention; Wherein this silo bottom is provided with a plurality of feeders that are used for discharging; The below of this silo also is provided with parallel a plurality of belt feeders; Wherein each belt feeder corresponds respectively at least one feeder in said a plurality of feeder, and has at least one belt conveyer scale on each belt feeder.
As shown in Figure 4, in step 410, open a belt feeder and the pairing all or part of feeder of this belt feeder in said a plurality of belt feeder.
In step 420, utilize the belt conveyer scale on the belt feeder of opening to measure the mass flow on this belt feeder.
Preferably, said feeder is the activation feeder.
In step 430; According to the mass flow result of a measurement or when said belt feeder time of run surpassed for first schedule time; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.Wherein said first schedule time also can be described as the tired time.
In step 430; Preferably according to the aggregate-value of mass flow result of a measurement in the 3rd schedule time and the comparative result of fatigue data of said belt feeder; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.Wherein, more preferably, the 3rd schedule time is less than first schedule time.Wherein said fatigue data can preestablish when belt feeder dispatches from the factory.
Preferably, repeated execution of steps 420 and step 430 in said method are to realize continuous detecting and the control to whole discharge process.
In above-mentioned steps 410-430 and repeatedly in execution in step 420 and 430 the process; If only opened the pairing M of a belt feeder feeder (wherein M is more than or equal to 1 and less than the quantity of the pairing whole feeders of this belt feeder); Then when said belt feeder time of run surpassed for second schedule time; M the feeder that use that select and M incomplete same feeder of M current unlatching a feeder from the pairing whole feeders of this belt feeder are replaced current unlatching carries out discharging, to avoid because the material level overbalance that certain feeder is not worked and caused for a long time.
Preferably, also can comprise step 440 in the described method of Fig. 4, in this step, utilize a plurality of level-sensing devices to detect the material level in the said silo.
In above-mentioned steps 410-430 and repeatedly in execution in step 420 and 430 the process, when having opened the pairing whole feeder of a belt feeder, adjust the load of the feeder of current unlatching according to the detected material level of said a plurality of level-sensing devices.The content of the method among this method of adjustment and Fig. 2 is consistent, repeats no more here.
Owing to be provided with a plurality of level-sensing devices; In step 420-430, close belt feeder and the pairing feeder of being opened of this belt feeder and open on the basis of another different belt feeder of belt feeder in said a plurality of belt feeder and the pairing all or part of feeder of this another belt feeder with using according to the mass flow result of a measurement; Can also carry out above-mentioned same operation according to the detected material level of said a plurality of level-sensing devices.The content of the method among this method of adjustment and Fig. 3 is consistent, repeats no more here.
Preferably, when all needs carried out above-mentioned same operation according to the detected material level of said a plurality of level-sensing devices and said mass flow result of a measurement, the priority of the detected material level of said a plurality of level-sensing devices was higher.By way of example; If confirm to switch to second belt feeder according to the mass flow result of a measurement on first belt feeder; But should switch back first belt feeder from second belt feeder according to the detected material level of level-sensing device simultaneously; Then open first belt feeder and close second belt feeder, this is because higher according to the priority of the judgement that detected material level carried out.
Preferably, said a plurality of level-sensing devices are corresponding one by one with said a plurality of feeders, and place respectively corresponding feeder directly over, to detect the material level at corresponding feeder place respectively.
Corresponding with the method among Fig. 4; In Fig. 7; The present invention also provides the silo material level balance control system according to another embodiment of the present invention; Wherein this silo bottom is provided with a plurality of feeders 130 that are used for discharging, and the below of this silo also is provided with parallel a plurality of belt feeders 150, and wherein each belt feeder corresponds respectively at least one feeder (concrete structure is referring to Fig. 1) in said a plurality of feeder 130; This system comprises a plurality of belt conveyer scales 140, wherein all is provided with a belt conveyer scale at least on each belt feeder in said a plurality of belt feeders 150; The control unit 710 that is electrically connected with said a plurality of feeder 130, said a plurality of belt feeders 150 and said a plurality of belt conveyer scale 140 respectively.
Wherein, this control unit 710 is used for opening a belt feeder and the pairing all or part of feeder of this belt feeder of said a plurality of belt feeder 150; Reception is from the measured mass flow of the belt conveyer scale of the belt feeder of being opened 140; According to said mass flow or when said belt feeder time of run surpassed for first schedule time; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.
Preferably; Said control unit also is used for the aggregate-value of mass flow result of a measurement in the 3rd schedule time and the comparative result of fatigue data according to said belt feeder; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.Wherein, more preferably, the 3rd schedule time is less than first schedule time.Wherein said fatigue data can preestablish when belt feeder dispatches from the factory.
Preferably; Said control unit also is configured to; When only having opened the pairing M of a belt feeder feeder (wherein M is more than or equal to 1 and less than the quantity of the pairing whole feeders of this belt feeder); If said belt feeder time of run surpassed for second schedule time, M the feeder that then uses from the pairing whole feeders of this belt feeder that select and M incomplete same feeder of M current unlatching a feeder to replace current unlatching carries out discharging.
In above system, said control unit also is used to utilize a plurality of level-sensing devices to detect the material level in the said silo.
Preferably, said control unit also is used for when having opened the pairing whole feeder of a belt feeder, adjusting the load of the feeder of current unlatching according to the detected material level of said a plurality of level-sensing devices.
Preferably; Said control unit is being closed belt feeder and the pairing feeder of being opened of this belt feeder and is being opened on the basis of another different belt feeder of the belt feeder with using in said a plurality of belt feeder and the pairing all or part of feeder of this another belt feeder according to the mass flow result of a measurement; Can also carry out above-mentioned same operation according to the detected material level of said a plurality of level-sensing devices.More preferably, when all needs carried out above-mentioned same operation according to the detected material level of said a plurality of level-sensing devices and said mass flow result of a measurement, the priority of the detected material level of said a plurality of level-sensing devices was higher.
Preferably, said a plurality of level-sensing devices are corresponding one by one with said a plurality of feeders, and place respectively corresponding feeder directly over, to detect the material level at corresponding feeder place respectively.
Also can carry out combination in any between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Pass through technique scheme; Use belt conveyer scale to detect mass flow; And determine whether belt feeder is switched through detected mass flow, like this, can occur timely material level being adjusted under the unbalanced situation by the material level in silo; When not influencing operation, guaranteed the safety and stability of whole discharge process.
Claims (19)
1. silo material level balance control method; Wherein this silo bottom is provided with a plurality of feeders that are used for discharging; The below of this silo also is provided with parallel a plurality of belt feeders, and wherein each belt feeder corresponds respectively at least one feeder in said a plurality of feeder, and has at least one belt conveyer scale on each belt feeder; It is characterized in that this method comprises:
1) belt feeder and the pairing all or part of feeder of this belt feeder in the said a plurality of belt feeders of unlatching;
2) utilize the belt conveyer scale on the belt feeder of opening to measure the mass flow on this belt feeder;
3) according to the mass flow result of a measurement or when said belt feeder time of run surpassed for first schedule time; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.
2. method according to claim 1, wherein repeated execution of steps 2) to 3).
3. method according to claim 1; Wherein in step 3); The aggregate-value of mass flow result of a measurement in the 3rd schedule time and the comparative result of fatigue data according to said belt feeder; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.
4. according to each the described method among the claim 1-3, wherein this method also comprises:
4) utilize a plurality of level-sensing devices to detect the material level in the said silo.
5. method according to claim 4 wherein when having opened the pairing whole feeder of a belt feeder, is adjusted the load of the feeder of current unlatching according to the detected material level of said a plurality of level-sensing devices.
6. method according to claim 4; Wherein according to the detected material level of said a plurality of level-sensing devices; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.
7. method according to claim 6 wherein preferentially determines whether to close belt feeder and the pairing feeder of being opened of this belt feeder and opens different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder according to detected material level rather than said mass flow result of a measurement.
8. method according to claim 4, wherein said a plurality of level-sensing devices are corresponding one by one with said a plurality of feeders, and place respectively corresponding feeder directly over, to detect the material level at corresponding feeder place respectively.
9. according to each the described method among the claim 1-3, wherein when only having opened the pairing M of a belt feeder feeder, wherein M is more than or equal to 1 and less than the quantity of the pairing whole feeders of this belt feeder:
When said belt feeder time of run surpassed for second schedule time, M the feeder that uses from the pairing whole feeders of this belt feeder that select and M incomplete same feeder of M current unlatching a feeder to replace current unlatching carried out discharging.
10. according to each the described method among the claim 1-3, wherein said feeder is the activation feeder.
11. silo material level balance control system; Wherein this silo bottom is provided with a plurality of feeders that are used for discharging; The below of this silo also is provided with parallel a plurality of belt feeders; Wherein each belt feeder corresponds respectively at least one feeder in said a plurality of feeder, it is characterized in that, this system comprises:
A plurality of belt conveyer scales wherein all are provided with a belt conveyer scale on each belt feeder in said a plurality of belt feeders at least;
The control unit that is electrically connected with said a plurality of feeders, said a plurality of belt feeders and said a plurality of belt conveyer scale respectively, this control unit is used for:
Open a belt feeder and the pairing all or part of feeder of this belt feeder in said a plurality of belt feeder;
Reception is from the measured mass flow of the belt conveyer scale of the belt feeder of being opened;
According to said mass flow or when said belt feeder time of run surpassed for first schedule time; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.
12. system according to claim 11; Wherein, Said control unit also is used for the aggregate-value of mass flow result of a measurement in the 3rd schedule time and the comparative result of fatigue data according to said belt feeder; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.
13. according to claim 11 or 12 described systems, wherein said control unit also is used to utilize a plurality of level-sensing devices to detect the material level in the said silo.
14. system according to claim 13, wherein said control unit also is used for when having opened the pairing whole feeder of a belt feeder, adjusting the load of the feeder of current unlatching according to the detected material level of said a plurality of level-sensing devices.
15. system according to claim 13; Wherein said control unit also is used for according to the detected material level of said a plurality of level-sensing devices; Close belt feeder and the pairing feeder of this belt feeder opened, and open different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder.
16. system according to claim 15, wherein said control unit preferentially determines whether to close belt feeder and the pairing feeder of being opened of this belt feeder and opens different another belt feeder and the pairing all or part of feeders of this another belt feeder of the belt feeder with using in said a plurality of belt feeder according to detected material level rather than said mass flow result of a measurement.
17. system according to claim 13, wherein said a plurality of level-sensing devices are corresponding one by one with said a plurality of feeders, and place respectively corresponding feeder directly over, to detect the material level at corresponding feeder place respectively.
18. according to claim 11 or 12 described systems; Wherein said control unit also is used for when only having opened the pairing M of a belt feeder feeder; If said belt feeder time of run surpassed for second schedule time; M the feeder that then uses from the pairing whole feeders of this belt feeder that select and M incomplete same feeder of M current unlatching a feeder to replace current unlatching carries out discharging, and wherein M is more than or equal to 1 and less than the quantity of the pairing whole feeders of this belt feeder.
19. according to claim 11 or 12 described systems, wherein said feeder is the activation feeder.
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| CN201210263018.1A CN102756927B (en) | 2012-07-26 | 2012-07-26 | Material level balance control method and system |
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| CN201210263018.1A CN102756927B (en) | 2012-07-26 | 2012-07-26 | Material level balance control method and system |
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