CN117886145B - Intelligent feeding system for on-line monitoring and controlling powder feeding amount based on dust concentration - Google Patents
Intelligent feeding system for on-line monitoring and controlling powder feeding amount based on dust concentration Download PDFInfo
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- CN117886145B CN117886145B CN202410291168.6A CN202410291168A CN117886145B CN 117886145 B CN117886145 B CN 117886145B CN 202410291168 A CN202410291168 A CN 202410291168A CN 117886145 B CN117886145 B CN 117886145B
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- 239000000428 dust Substances 0.000 title claims abstract description 382
- 239000000843 powder Substances 0.000 title claims abstract description 179
- 238000012544 monitoring process Methods 0.000 title claims abstract description 42
- 239000002360 explosive Substances 0.000 claims abstract description 44
- 238000005452 bending Methods 0.000 claims description 12
- 238000004880 explosion Methods 0.000 abstract description 33
- 230000002265 prevention Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 28
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 9
- 229910052744 lithium Inorganic materials 0.000 description 9
- 230000002159 abnormal effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000011835 investigation Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The application relates to the field of dust explosion prevention, in particular to an intelligent feeding system for on-line monitoring and controlling the feeding amount based on dust concentration, which comprises the following components: the dust pipeline is used for introducing explosive dust; the powder feeding device comprises a powder feeding pipeline and a powder feeding mechanism, wherein the powder feeding pipeline is communicated with the powder feeding pipeline and the powder feeding mechanism, and the powder feeding mechanism is used for conveying inert dust to the powder feeding pipeline; the dust concentration meter is arranged at one end of the powder feeding pipeline, which is close to the dust pipeline, and is used for monitoring and acquiring the dust concentration value in the powder feeding pipeline and sending out a signal; and the control center is respectively and electrically connected with the powder feeding mechanism and the dust concentration meter and is used for receiving signals sent by the dust concentration meter and outputting control signals to the powder feeding mechanism. The dust concentration meter can monitor and accurately control the amount of inert dust entering the dust pipeline on line, and simultaneously can accurately reflect the mixing condition of the inert dust and the explosive dust, so that the explosion risk can be reduced.
Description
Technical Field
The application relates to the field of dust explosion prevention, in particular to an intelligent feeding system for on-line monitoring and controlling the feeding amount based on dust concentration.
Background
The lithium battery production equipment generates a large amount of explosive dust in the production process, and the numerical values of the maximum explosion pressure and the explosion index of the dust cloud of the dust are increased when the dust concentration is large, so that the production process has a great safety risk. In order to ensure the life safety of personnel in the production process, a certain amount of inert dust is usually added into the explosive dust to reduce the explosion pressure and the explosion index, and the alarm can be given out in time under abnormal conditions to ensure the personal safety in the lithium battery production process as much as possible. When charging inert dust into explosive dust, the charging value of the inert dust needs to be accurately controlled. If the charging value of the inert dust is lower than the preset value, the explosion risk of the explosive dust is still higher. If the charging value of the inert dust is higher than the preset value, the explosion-proof cost is relatively high.
The powder adding device in the prior art indirectly calculates the powder adding amount of the inert dust by measuring the weight of the inert dust tank body at different time points through a weighing sensor. The powder adding device can only detect the amount of the powder with the weight output by the inert powder tank body, and as the inert powder possibly partially remains in the powder adding device or the powder adding pipeline, whether the reduced amount of the inert powder is completely mixed with the explosive powder through the powder adding pipe cannot be accurately known. The technical scheme cannot monitor whether the charging value of the inert dust is consistent with the preset value, so that the explosion risk of the dust in the production process is still difficult to control.
Disclosure of Invention
In order to solve the problem that the explosion risk of dust is still difficult to control in the production process, the application provides an intelligent feeding system for on-line monitoring and controlling the feeding amount based on the dust concentration.
The application provides an intelligent feeding system for on-line monitoring and controlling the powder feeding amount based on dust concentration, which adopts the following technical scheme:
An intelligent feeding system for on-line monitoring and controlling the amount of powder feeding based on dust concentration, comprising:
the dust pipeline is used for introducing explosive dust;
The powder feeding device comprises a powder feeding pipeline and a powder feeding mechanism, wherein the powder feeding pipeline is communicated with the powder feeding pipeline and the powder feeding mechanism, and the powder feeding mechanism is used for conveying inert dust to the powder feeding pipeline; the dust concentration meter is arranged at one end of the powder feeding pipeline, which is close to the dust pipeline, and is used for monitoring and acquiring the dust concentration value in the powder feeding pipeline and sending out a signal;
The control center is respectively and electrically connected with the powder feeding mechanism and the dust concentration meter and is used for receiving signals sent by the dust concentration meter and outputting control signals to the powder feeding mechanism;
When the monitoring value of the dust concentration meter is higher than or lower than the highest value or the lowest value in the error range of the preset value, the control center controls the powder feeding mechanism to correspondingly slow down or speed up the inert dust conveying speed so that the dust concentration value and the preset value are kept in the error range.
Through adopting above-mentioned technical scheme, firstly, when letting in inert dust explosion-proof to the dust pipeline, can be through the real-time on-line monitoring of dust concentration appearance and feedback inert dust and get into the quantity to the dust pipeline, therefore can be according to the accurate control inert dust's of dust concentration let in the volume in order to reduce explosion risk. Secondly, the position of the dust concentration meter can accurately reflect the mixing condition of inert dust and explosive dust, so that misjudgment can be reduced to improve the safety in the production process. Thirdly, the powder throwing amount of the inert dust can be effectively controlled to be always in the error range of the preset value by matching the dust concentration meter, the control center and the powder throwing mechanism, so that the explosion risk can be further reduced.
Optionally, the device further comprises a dust removing mechanism, wherein the dust removing mechanism is communicated with a powder outlet of the dust pipeline to form negative pressure so as to drive the explosive dust to flow towards the powder outlet, and a pipe section at the communicating part of the powder feeding pipeline and the dust pipeline bends and inclines along the flowing direction of the explosive dust.
Through adopting above-mentioned technical scheme, first, throw the slope direction of buckling of powder pipeline and make the inert dust that gets into the dust pipeline get into dust removal mechanism's resistance less to throwing the explosive dust in the powder pipeline. Secondly, the bending and tilting direction of the powder feeding pipeline is convenient for negative pressure formed by the dust removing mechanism so as to suck out inert dust in the powder feeding pipeline, and the inert dust enters the dust pipeline to be mixed with the explosive dust. Thirdly, can effectively handle the explosive dust through dust removal mechanism, further improve the security of production.
Optionally, the device further comprises an alarm mechanism, wherein the alarm mechanism is electrically connected with the control center, a plurality of powder feeding pipelines are arranged, and each powder feeding pipeline is provided with a dust concentration meter;
When the numerical deviation between the monitoring value of at least one dust concentration meter and the monitoring values of other dust concentration meters exceeds a preset range, the control center outputs an alarm signal to the alarm mechanism; when the monitoring value of at least one dust concentration meter exceeds the maximum or minimum dust concentration corresponding to the dust conveying speed of the dust throwing mechanism, the control center also outputs an alarm signal to the alarm mechanism.
Through adopting above-mentioned technical scheme, compare in setting up a dust concentration appearance, set up a plurality of dust concentration appearance and contrast a plurality of dust concentration appearance's monitoring value, can reduce because single dust concentration appearance or throw powder mechanism and break down and not know in time and cause the risk that produces the explosion, further improved the security. When the numerical value of the dust concentration meter is abnormal, related staff can timely learn and conduct fault investigation through the alarm mechanism. Therefore, the personal safety of staff can be further ensured, and the risk of dust explosion in the production process is reduced.
Optionally, the control center receives signals sent by each dust concentration meter, calculates an average dust concentration value according to monitoring values of all the dust concentration meters, and controls the dust conveying speed of the dust feeding mechanism according to the average dust concentration value and the preset value.
Through adopting above-mentioned technical scheme, control center makes the data of control more accurate through calculating the average concentration value, therefore can effectively improve the inert dust and get into the precision of the dust volume in the dust pipeline, reduce the explosion risk.
Optionally, the height positions of the dust concentration meters are consistent, and the lengths of the pipe sections of the powder feeding pipelines between the powder feeding mechanism and the dust concentration meters are consistent.
Through adopting above-mentioned technical scheme, the position of dust concentration appearance and throw the length setting that the powder pipeline corresponds for the monitoring environment of each dust concentration appearance is the same as far as possible, with the numerical value difference that reduces each dust concentration appearance. Only when the difference between the dust concentration meters is large, it is indicated that the system may have a certain fault. The technical scheme can reduce the occurrence of the condition that the alarm mechanism alarms due to the fact that the system misjudges to have faults.
Optionally, the extending paths of the powder feeding pipelines, which are close to the bending inclined sections of the dust pipelines, intersect at a point, and the point is located on the axis of the dust pipelines.
Through adopting above-mentioned technical scheme, the removal route of the inert dust that shifts out in the powder pipeline is thrown to the multiunit intersects at a bit, can make inert dust collide with the explosive dust in the dust pipeline effectively in order to realize intensive mixing, therefore can further reduce the explosion risk.
Optionally, the length of the pipe section of the powder feeding pipeline between the dust concentration meter and the dust pipeline is consistent, and each powder feeding pipeline is provided with at least one bending part; wherein the number of bends in the powder feeding pipe above the dust pipe is less than the number of bends in the powder feeding pipe below the dust pipe.
Through adopting above-mentioned technical scheme, first, the setting of buckling can make pipeline length the same, therefore can make inert dust enter into the dust pipeline simultaneously from throwing the powder pipeline to guarantee to get into the quantity of inert dust of dust pipeline and monitor value unanimity. Secondly, the bending quantity of the powder feeding pipelines at different positions is inconsistent, so that the moving resistance of inert dust entering the dust pipelines is the same as much as possible, and the inert dust can enter the dust pipelines from different powder feeding pipelines at the same time.
Optionally, the positions of the communicating positions of the powder feeding pipelines and the dust pipelines are uniformly distributed along the circumferential direction of the dust pipelines at equal intervals.
Through adopting above-mentioned technical scheme, through evenly arranging the multiunit powder throwing pipeline along the circumference equidistance of dust pipeline, can make inert dust get into in the dust pipeline from different directions to inert dust and explosive dust's mixed effect has been improved.
Optionally, a pipe section of the powder feeding pipeline near one end of the powder feeding mechanism is a telescopic section.
By adopting the technical scheme, the setting of the telescopic section allows the powder feeding pipeline to generate certain vibration in the system operation so as to reduce the possibility that inert dust can be accumulated in the powder feeding pipeline.
Optionally, the powder feeding mechanism is set as a spiral powder feeding machine.
By adopting the technical scheme, the spiral powder feeder can effectively control the conveying speed of inert dust through the rotating speed.
In summary, the present application includes at least one of the following beneficial technical effects:
1. The dust concentration meter can monitor and feed back the quantity of the inert dust entering the dust pipeline on line in real time, so that the feeding quantity of the inert dust can be accurately controlled according to the dust concentration to reduce explosion risk, and meanwhile, the position of the dust concentration meter can accurately reflect the mixing effect of the inert dust and the explosive dust, so that misjudgment can be reduced to improve the safety in the production process; finally, the powder feeding amount of the inert dust can be effectively controlled to be always within the error range of the preset value by matching the dust concentration meter, the control center and the powder feeding mechanism, so that the explosion risk can be further reduced;
2. Compared with the arrangement of one dust concentration meter, the dust concentration meters are arranged and the monitoring values of the dust concentration meters are compared, so that the risk of explosion caused by failure of a powder feeding mechanism or the failure of a single dust concentration meter can be reduced, and the safety guarantee is further improved;
3. The position of the dust concentration meter and the length of the powder feeding pipeline can reduce the occurrence of the condition that the alarm mechanism alarms due to the fault of the misjudgment of the system, and can effectively improve the mixing effect of inert dust and explosive dust, so that the explosion risk is reduced, and the personal safety of staff is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent feeding system for on-line monitoring and controlling the amount of powder feeding based on the concentration of dust in embodiment 1 of the present application.
Fig. 2 is an enlarged schematic view at a in fig. 1.
Fig. 3 is an enlarged schematic view at B in fig. 1.
Fig. 4 is a schematic structural diagram of an intelligent feeding system for on-line monitoring and controlling the amount of powder feeding based on the concentration of dust in embodiment 2 of the present application.
Fig. 5 is an enlarged schematic view at C in fig. 4.
Fig. 6 is a schematic diagram showing the connection between the dust pipe and the powder feeding pipe in the direction D in fig. 4.
Reference numerals illustrate:
1. A dust duct; 2. a powder feeding mechanism; 3. a powder feeding pipeline; 4. a dust concentration meter; 5. a control center; 6. a dust removing mechanism; 7. and an alarm mechanism.
Detailed Description
The present application will be described in further detail with reference to fig. 1 to 6.
It should be noted that, in the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The embodiment of the application discloses an intelligent feeding system for on-line monitoring and controlling the powder feeding amount based on dust concentration.
In the embodiment of the application, the dust explosion prevention of the lithium battery production equipment in the production process is taken as an example, and the intelligent feeding system is not limited to the dust explosion prevention of the lithium battery production equipment in the production process, but is only applicable to the field.
Example 1:
referring to fig. 1, an intelligent feeding system for on-line monitoring and controlling the amount of powder feeding based on the concentration of dust comprises a dust pipe 1, a powder feeding mechanism 2, a powder feeding pipe 3, a dust concentration meter 4, a control center 5 and a dust removing mechanism 6.
Referring to fig. 1, a dust pipe 1 is used for introducing explosive dust, and a dust removing mechanism 6 is communicated with a dust outlet of the dust pipe 1 to form negative pressure so as to drive the explosive dust to flow towards the dust outlet. In this embodiment, the powder inlet of the dust pipe 1 is communicated with a lithium battery production device (not shown in the figure), and explosive dust generated in the production process of the lithium battery production device enters the dust removing mechanism 6 through the dust pipe 1. Wherein the dust removing mechanism 6 forms negative pressure through an internal fan thereof, thereby attracting the explosive dust to flow in the dust pipeline 1. Since the specific structure of the dust removing mechanism 6 is the prior art, the details are not described here. The dust removing mechanism 6 can effectively treat explosive dust, so that the production safety can be improved.
Referring to fig. 1, a powder feeding pipe 3 communicates a dust pipe 1 with a powder feeding mechanism 2, and the powder feeding mechanism 2 is used for feeding inert dust to the dust pipe 1. Therefore, inert dust enters the dust pipeline 1 from the powder outlet end of the powder feeding mechanism 2 through the powder feeding pipeline 3, and the explosion risk of explosive dust can be effectively reduced by introducing the inert dust, so that the safety in the production process of lithium batteries is ensured.
In this embodiment, the powder feeding mechanism 2 is provided as a screw powder feeder. The spiral powder feeder can push inert dust to move to the powder outlet end of the powder feeding mechanism 2 through rotation, and meanwhile, the conveying speed of the inert dust can be effectively controlled through adjusting the rotation speed of the spiral powder feeder.
Referring to fig. 1, a dust concentration meter 4 is installed at one end of the dust pipe 3 near the dust pipe 1, and is used for monitoring and acquiring the dust concentration value in the dust pipe 3 and sending out a signal. The control center 5 is electrically connected with the powder feeding mechanism 2 and the dust concentration meter 4 respectively, and is used for receiving signals sent by the dust concentration meter 4 and outputting control signals to the powder feeding mechanism 2. In the application, the control center 5 is arranged as a PLC electric control cabinet.
Specifically, when the dust concentration value monitored by the dust concentration meter 4 is higher than or lower than the highest value or the lowest value in the error range of the preset value, the control center 5 controls the powder feeding mechanism 2 to correspondingly slow down or speed up the inert dust conveying speed so that the dust concentration value and the preset value are kept in the error range. The preset value of the concentration of the inert dust is determined according to the concentration value of explosive dust generated in the production process of lithium battery production equipment. In this embodiment, the preset value is an optimal value that allows the explosive dust to reduce its explosion risk factor. It can be appreciated that when the concentration value of the explosive dust is high, the preset value is correspondingly high; when the concentration value of the explosive dust is low, the preset value is correspondingly low.
Through the mode, the concentration value of the inert dust can be fed back to the control center 5 in real time on line through the dust concentration meter 4, and the control center 5 can accurately control the conveying speed of the powder feeding mechanism 2 by comparing the collected concentration data of the inert dust with the preset value, so that the powder feeding amount of the inert dust is ensured to be in the error range of the preset value, and the personal safety in the lithium battery production process is further ensured.
In the prior art, the weight change of the dust tank body is monitored through a weighing sensor to feed back the amount of inert dust, and the amount of the inert dust which is reduced cannot be effectively ensured to be fully mixed with the explosive dust through the powder feeding pipeline 3. The reason is that part of the inert dust may accumulate inside the powder feeding mechanism 2. Thus, although the load cell monitors less inert dust, the actually reduced inert dust may not enter the dust duct 1 to mix with the explosive dust, resulting in misjudging the amount of inert dust. In this case, however, the risk of explosion is still high, since the inert dust mixed in the explosive dust is relatively reduced. In this embodiment, the position of the dust concentration meter 4 can monitor and feed back the amount of inert dust entering the dust pipeline 1 on line in real time, and can accurately reflect the mixed condition of the reduced amount of inert dust and explosive dust, so that the misjudgment condition can be reduced to improve the safety in the production process and reduce the explosion risk.
In addition, when the amount of the inert dust is controlled through the weighing sensor in the prior art, the amount of the inert dust needs to be calculated according to the weight change of different time points, so that the measurement period is long, real-time monitoring cannot be achieved, and the dust concentration meter 4 in the embodiment can monitor the dust concentration value in real time and is more accurate. Meanwhile, the measuring precision is low because the weighing sensor is possibly interfered by the operation vibration of mechanical equipment, and the dust concentration meter 4 is not interfered by the condition through concentration feedback inert dust quantity, so that the precision is higher.
Referring to fig. 2, the pipe section at the connection point of the powder feeding pipe 3 and the dust pipe 1 is bent and inclined along the flow direction of the explosive dust. The bending and tilting arrangement of the powder feeding pipeline 3 makes inert dust entering the dust pipeline 1 have smaller resistance to the explosive dust in the powder feeding pipeline 3 entering the dust removing mechanism 6. Meanwhile, the bending and tilting direction of the powder feeding pipeline 3 is convenient to suck out by means of the suction force of the dust removing mechanism 6, so that inert dust in the powder feeding pipeline 3 enters the dust pipeline 1 to be mixed with the explosive dust. The explosion risk of explosive dust can thus be reduced.
Referring to fig. 3, a pipe section of the powder feeding pipe 3 near one end of the powder feeding mechanism 2 is provided as a telescopic section. The arrangement of the telescopic section allows the powder feeding pipe 3 to generate certain vibration so as to reduce the possibility that inert dust may be accumulated in the powder feeding pipe 3.
The implementation principle of the embodiment 1 is as follows: the explosive dust enters the dust removing mechanism 6 through the dust pipeline 1 for dust removal, and the inert dust enters the dust pipeline 1 through the powder feeding pipeline 3 under the action of the powder feeding mechanism 2 for mixing with the explosive dust so as to reduce the explosion risk of the explosive gas. The dust concentration meter 4 monitors the dust concentration in the powder feeding pipeline 3 in real time on line, sends a signal to the control center 5, the control center 5 receives the signal and processes analysis data, then outputs a control signal to the powder feeding mechanism 2, and controls the powder feeding mechanism 2 to adjust the dust conveying speed in real time so as to ensure that the inert dust amount is within the error range of a preset value.
Example 2:
referring to fig. 4, the difference between the present embodiment and embodiment 1 is that an intelligent feeding system for on-line monitoring and controlling the amount of powder feeding based on the dust concentration in the present embodiment further includes an alarm mechanism 7, the alarm mechanism 7 is electrically connected with the control center 5, the powder feeding pipelines 3 are provided in plurality, and each powder feeding pipeline 3 is provided with a dust concentration meter 4. In this embodiment, three groups of powder feeding pipelines 3 and dust concentration meters 4 are taken as an example. In other embodiments, there may be two groups, four groups, five groups, etc.
Wherein, when the value deviation of the monitoring value of at least one dust concentration meter 4 and the monitoring value of other dust concentration meters 4 exceeds the preset range, the control center 5 outputs an alarm signal to the alarm mechanism 7. It may be indirectly indicated that the dust concentration meter 4 may be damaged or that the dust pipe 3 corresponding to the dust concentration meter 4 may be damaged. The preset range is the maximum deviation value of data between the dust concentration meters 4 set by related staff according to actual working conditions. It can be appreciated that the smaller the preset range, the more accurate the log control and the higher the safety production factor. Compared with the dust concentration meter 4, if the dust concentration meter 4 is damaged, the measured value of the dust concentration meter is abnormal, and the error judgment of the control center 5 is caused, and the deviation of the value of the inert dust conveyed by the powder feeding mechanism 2 is further caused, so that the explosion risk is increased.
In this embodiment, when one of the dust concentration meters 4 is inaccurate in measured value due to damage, the comparison between the data of the other two dust concentration meters 4 and the other two dust concentration meters can well indicate that the system is abnormal, and the alarm mechanism 7 outputs an alarm signal so that relevant staff can stop the system in time to perform risk investigation, thereby ensuring personal safety in the production process. Since the probability of damage to the plurality of dust concentration meters 4 is small at the same time, the production safety factor can be improved as much as possible.
When the monitoring value of the at least one dust concentration meter 4 exceeds the maximum or minimum dust concentration corresponding to the dust conveying speed of the dust throwing mechanism 2, the control center 5 also outputs an alarm signal to the alarm mechanism 7. At this time, the powder feeding mechanism 2 can be indirectly indicated to be possibly abnormal, so that related staff is required to be involved in time for risk investigation, and the production safety coefficient is further improved.
When the output values of the dust concentration meters 4 are similar and within the error range of the preset value, the control center 5 receives the signal sent by each dust concentration meter 4, calculates an average dust concentration value according to the monitoring values of all the dust concentration meters 4, and controls the dust conveying speed of the powder feeding mechanism 2 according to the average dust concentration value and the preset value. The data monitored by calculating the average dust concentration value are more accurate, so that the accuracy of the dust amount of inert dust entering the dust pipeline 1 can be effectively improved, and the explosion risk is reduced.
Referring to fig. 4 and 5, the dust concentration meters 4 are located at the same height positions, and the lengths of the pipe sections of the dust pipe 3 between the dust feeding mechanism 2 and the dust concentration meters 4 are identical. The position of the dust concentration meter 4 and the corresponding length setting of the powder feeding pipeline 3 can enable the monitoring environments of the dust concentration meters 4 to be the same as much as possible, so that the numerical value difference of the dust concentration meters 4 is reduced. Only when the difference between the dust concentration meters 4 is large, an alarm is required. The technical scheme can reduce the occurrence of the condition that the alarm mechanism 7 alarms due to the fact that the system misjudges to have faults.
Referring to fig. 5, the extending paths of the plurality of groups of powder feeding pipes 3 near the bent inclined sections of the dust pipe 1 intersect at a point on the axis of the dust pipe 1. The inert dust can collide with each other after entering the dust pipeline 1 through the inclined section of the powder feeding pipeline 3 so that the inert dust can be fully mixed with the explosive dust to reduce the explosion risk.
Referring to fig. 5, the lengths of the pipe sections of the powder feeding pipes 3 between the dust concentration meter 4 and the dust pipe 1 are consistent, and each powder feeding pipe 3 is provided with at least one bending. Wherein, the quantity of bending of the powder feeding pipeline 3 above the dust pipeline 1 is less than the quantity of bending of the powder feeding pipeline 3 below the dust pipeline 1. The same pipeline length can be ensured by arranging different numbers of bends, so that inert dust can enter the dust pipeline 1 from different powder feeding pipelines 3 at the same time, and the inert dust amount entering the dust pipeline 1 is consistent with the monitoring value of the dust concentration meter 4. The powder feeding pipelines 3 at different positions are provided with different bending numbers, so that the moving resistance of the inert dust in the powder feeding pipelines is as consistent as possible, and the inert dust can enter the dust pipeline 1 from different powder feeding pipelines 3 at the same time.
In the present application, for example, the number of bends in the powder feeding pipe 3 above the dust pipe 1 is set to one, and the number of bends in the powder feeding pipe 3 below the dust pipe 1 is set to two. Since the powder feeding pipe 3 above the dust pipe 1 needs to overcome the high Cheng work during lifting, a bend is provided, so that the resistance of the powder feeding pipe 3 and the powder feeding pipe 3 below the dust pipe 1 are as consistent as possible.
Referring to fig. 6, the positions of the communicating parts of the plurality of groups of powder feeding pipelines 3 and the dust pipeline 1 are uniformly distributed at equal intervals along the circumferential direction of the dust pipeline 1. The inert dust can enter the dust pipeline 1 from different directions, so that the mixing effect of the inert dust and the explosive dust in the dust pipeline 1 is improved, and the explosion risk is reduced.
The implementation principle of embodiment 2 differs from that of embodiment 1 in that: the control center 5, the dust concentration meter 4, the powder feeding mechanism 2 and the alarm mechanism 7 are different in signal transmission flow. In this embodiment, the control center 5 compares and analyzes the measured values of the plurality of dust concentration meters 4 with each other, and compares and analyzes the maximum or minimum dust concentration value corresponding to the dust conveying speed of the dust feeding mechanism 2, and determines whether or not an alarm signal needs to be sent to the alarm mechanism 7.
If the control center 5 does not send out an alarm signal, the control center 5 calculates an average dust concentration value according to the measured values of the dust concentration meters 4, performs comparison analysis with a preset value, and sends out a control signal to the powder feeding mechanism 2 according to the analysis result so as to control the inert dust conveying speed.
If the control center 5 sends out an alarm signal, the control center 5 does not perform subsequent data processing.
Therefore, the embodiment can timely find out abnormality and remind relevant staff to timely intervene in investigation so as to further reduce explosion risk and ensure personal safety.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (5)
1. An intelligent feeding system for on-line monitoring and controlling the feeding amount based on dust concentration, which is characterized by comprising:
A dust pipeline (1) for introducing explosive dust;
The powder feeding device comprises a powder feeding pipeline (3) and a powder feeding mechanism (2), wherein the powder feeding pipeline (3) is communicated with the dust pipeline (1) and the powder feeding mechanism (2), and the powder feeding mechanism (2) is used for conveying inert dust to the dust pipeline (1);
The dust concentration meter (4) is arranged at one end of the powder feeding pipeline (3) close to the dust pipeline (1) and is used for monitoring and acquiring a dust concentration value in the powder feeding pipeline (3) and sending out a signal;
the control center (5) is respectively and electrically connected with the powder feeding mechanism (2) and the dust concentration meter (4) and is used for receiving signals sent by the dust concentration meter (4) and outputting control signals to the powder feeding mechanism (2);
When the monitoring value of the dust concentration meter (4) is higher or lower than the highest value or the lowest value in the error range of the preset value, the control center (5) controls the powder feeding mechanism (2) to correspondingly slow down or speed up the inert dust conveying speed so as to keep the dust concentration value and the preset value in the error range;
the dust collection device further comprises a dust collection mechanism (6), wherein the dust collection mechanism (6) is communicated with a powder outlet of the dust pipeline (1) to form negative pressure so as to drive explosive dust to flow towards the powder outlet, and a pipe section at the communication part of the powder feeding pipeline (3) and the dust pipeline (1) is bent and inclined along the flow direction of the explosive dust; the dust concentration meter (4) is also positioned in front of the inclined pipe section of the powder feeding pipeline (3);
The dust concentration device further comprises an alarm mechanism (7), wherein the alarm mechanism (7) is electrically connected with the control center (5), a plurality of powder feeding pipelines (3) are arranged, and each powder feeding pipeline (3) is provided with a dust concentration meter (4);
when the numerical deviation between the monitoring value of at least one dust concentration meter (4) and the monitoring values of other dust concentration meters (4) exceeds a preset range, the control center (5) outputs an alarm signal to the alarm mechanism (7); when the monitoring value of at least one dust concentration meter (4) exceeds the maximum or minimum dust concentration corresponding to the dust conveying speed of the dust throwing mechanism (2), the control center (5) also outputs an alarm signal to the alarm mechanism (7);
The extending paths of the plurality of powder feeding pipelines (3) close to the bending inclined sections of the dust pipeline (1) are intersected at a point, and the extending paths are positioned on the axis of the dust pipeline (1);
The height positions of the dust concentration meters (4) are consistent, and the lengths of pipe sections of the powder feeding pipelines (3) between the powder feeding mechanism (2) and the dust concentration meters (4) are consistent; the lengths of the pipe sections of the powder feeding pipelines (3) between the dust concentration meter (4) and the dust pipelines (1) are consistent, and each powder feeding pipeline (3) is provided with at least one bending part; wherein the number of bends in the powder feeding pipe (3) above the dust pipe (1) is less than the number of bends in the powder feeding pipe (3) below the dust pipe (1).
2. The intelligent feeding system for on-line monitoring and powder feeding amount control based on dust concentration according to claim 1, wherein: the control center (5) receives signals sent by each dust concentration meter (4) and calculates an average dust concentration value according to monitoring values of all the dust concentration meters (4), and the control center (5) controls the dust conveying speed of the dust feeding mechanism (2) according to the average dust concentration value and the preset value.
3. The intelligent feeding system for on-line monitoring and powder feeding amount control based on dust concentration according to claim 1, wherein: the positions of the communicating positions of the powder feeding pipelines (3) and the dust pipelines (1) are uniformly distributed along the circumferential direction of the dust pipelines (1) at equal intervals.
4. The intelligent feeding system for on-line monitoring and powder feeding amount control based on dust concentration according to claim 1, wherein: the pipe section of the powder feeding pipeline (3) close to one end of the powder feeding mechanism (2) is a telescopic section.
5. The intelligent feeding system for on-line monitoring and powder feeding amount control based on dust concentration according to claim 1, wherein: the powder throwing mechanism (2) is arranged as a spiral powder throwing machine.
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