CN112811122A - Anti-blocking system for hopper of grab ship unloader - Google Patents
Anti-blocking system for hopper of grab ship unloader Download PDFInfo
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- CN112811122A CN112811122A CN202011629344.0A CN202011629344A CN112811122A CN 112811122 A CN112811122 A CN 112811122A CN 202011629344 A CN202011629344 A CN 202011629344A CN 112811122 A CN112811122 A CN 112811122A
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- hopper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/60—Loading or unloading ships
- B65G67/606—Loading or unloading ships using devices specially adapted for bulk material
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- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention discloses a hopper anti-blocking system of a grab ship unloader, which comprises a hopper blocking early warning unit, a hopper anti-blocking early warning unit and a control unit, wherein the hopper anti-blocking early warning unit is arranged in a hopper and a feeding area of the grab ship unloader and is used for detecting whether the hopper is blocked and monitoring the actual operation condition of material flow; the PLC control unit is used for receiving the material blocking state and the material flow actual operation state transmitted by the hopper material blocking early warning unit, reading a belt scale working state signal, a hopper weighing signal and a material blocking detection switch signal from the received information, judging whether a material blocking detection switch action is abnormal, whether the hopper weight has a descending trend or not and whether a belt scale material flow signal is abnormal or not, and if so, sending an early warning signal, automatically adjusting the opening of the hopper and outputting a corresponding operation instruction for controlling material blocking; and the hopper blockage processing unit receives the control instruction transmitted by the PLC control unit and conducts dredging processing on the blockage condition of the hopper opening.
Description
Technical Field
The invention relates to the field of control over port bulk cargo loading and unloading machinery, in particular to a hopper anti-blocking system of a grab ship unloader.
Background
For port bulk cargo handling machinery provided with a hopper mechanism, such as a grab ship unloader, due to the physical characteristics of bulk cargo materials, particularly when the water content of the materials is large, the phenomenon of material blockage easily occurs in the mouth area of the hopper. In case the hopper putty takes place, will influence the normal operation of grab ship unloader to a great extent. Meanwhile, the manual cleaning is needed after the hopper is blocked, so that a great workload is increased for the operation and maintenance of the wharf, and meanwhile, the operation and maintenance cost of the wharf is greatly increased, so that the problem that the hopper blocking phenomenon of the grab ship unloader needs to be researched and analyzed in the field is solved, the reasonable hopper anti-blocking control method is adopted, the risk of the hopper blocking of the grab ship unloader is greatly reduced, and the high efficiency and reliability of the equipment operation are further ensured.
Disclosure of Invention
According to the problems existing in the prior art, the invention discloses a hopper anti-blocking system of a grab ship unloader, which comprises:
the hopper material blockage early warning unit is arranged in a hopper and a feeding area of the grab ship unloader and used for detecting whether the hopper is blocked or not and monitoring the actual operation condition of material flow;
the PLC control unit is used for receiving the material blocking state and the material flow actual operation state transmitted by the hopper material blocking early warning unit, reading a belt scale working state signal, a hopper weighing signal and a material blocking detection switch signal from the received information, judging whether a material blocking detection switch action is abnormal, whether the hopper weight has a descending trend or not and whether a belt scale material flow signal is abnormal or not, and if so, sending an early warning signal, automatically adjusting the opening of the hopper and outputting a corresponding operation instruction for controlling material blocking;
and the hopper blockage processing unit receives the control instruction transmitted by the PLC control unit and conducts dredging processing on the blockage condition of the hopper opening.
Further, the hopper material blockage early warning unit comprises a material blockage detection switch, an on-machine belt scale, a hopper weighing sensor and a hopper door displacement sensor; the material blockage detection switch detects material flow blockage state information at a blanking opening, the belt scale on the machine detects instantaneous material flow and accumulated material flow information of a belt, the hopper weighing sensor detects hopper weight information in real time, and the hopper door displacement sensor detects hopper opening state information.
Further, the PLC control unit comprises a PLC controller, a DP communication module, an Ethernet switch, a remote substation DP module, an AI module, a DI module and a DO module;
the PLC controller regulates and controls the working process of the grab ship unloader in real time, the PLC control unit is in data communication with a remote substation through a DP communication module and a remote substation DP module by adopting a Profibus DP protocol, the PLC control unit is in data communication with the belt weigher by adopting a TCP/IP protocol through an Ethernet switch, the AI module is used for receiving detection information transmitted by a hopper door displacement sensor and a hopper weighing sensor, the DI module is used for receiving data information transmitted by a material blockage detection switch, and the PLC controller is used for driving and controlling a hopper wall vibrator and an air cannon through the DO module.
Further, the PLC control unit carries out real-time detection, analysis and blockage early warning judgment on the detection data transmitted by the hopper blockage early warning unit, and the following modes are specifically adopted:
the instantaneous material flow and the accumulative total material flow information of the belt conveyed by the belt scale on the receiver adopt a hopper material blockage early warning judgment formula to judge whether the material flow of the belt scale is abnormal or not:
(W01*V01-W00*V00)*ΔT<K0；
wherein W01Is the current weight of the belt scale, V01Is the current running speed of the belt scale, W00For a scanning cycle weight, V, on a belt scale00Is a scanning cycle speed on the belt scale, Delta T is a system scanning cycle time, K0The flow fluctuation alarm threshold value of the belt scale is adopted, when the calculated value is smaller than the flow fluctuation alarm threshold value of the belt scale, the abnormal interruption of the material flow of the belt scale is judged, and a material blocking early warning is sent out;
receiving hopper weight information transmitted by a hopper weighing sensor to judge whether the hopper weight has a descending trend:
WHP1＝a(XHPWS1+XHPLS1)+b；
WHP0＝a(XHPWS0+XHPLS0)+b；
(WHP1-WHP0)/ΔT>KHP0；
WHP1at the current hopper weight, WHP0For the weight of the hopper, X, of the previous scanning cycleHPWS1For the current hopper sea side weighing sensor value, XHPLS1For the current hopper landside weighing sensor value, XHPWS0For the last scanning cycle the value of the hopper sea-side weighing sensor, XHPLS0The value of the hopper landside weighing sensor in the previous scanning period is a, a is a hopper weight conversion proportionality coefficient, b is a hopper weight conversion compensation coefficient, delta T is the system scanning period time, KHP0Judging a threshold value for abnormal interruption of the hopper weight descending trend, and when the feeding system operates normally and is in non-grab bucket blanking time, if the calculated value is greater than the judgment threshold value, judging that the hopper weight descending trend is abnormal interruption, and sending out a material blocking early warning;
hopper unbalance loading early warning judgment process
A＝(XHPWS-XHPLS)/(XHPWS+XHPLS)；
XHPWSIs the value of a hopper sea side weighing sensor, XHPLSThe numerical value of a weighing sensor on the land side of the hopper is shown, A is the unbalance loading proportion of the hopper, and when A is more than 20%, the unbalance loading of the material on the sea side is serious, and the early warning of the material blockage on the sea side is sent out; and when A is less than-20%, the land side material unbalance loading is serious, and land side material blockage early warning is sent out.
By adopting the technical scheme, the invention provides the hopper anti-blocking system of the grab ship unloader, which monitors the working process of the hopper of the grab ship unloader, designs a reasonable hopper blocking prevention and processing scheme by detecting data information transmitted by detection elements such as an on-machine belt scale, a blocking detection switch, a hopper door displacement sensor, a hopper weighing sensor and the like which are configured and carrying out calculation analysis on the detected signal data, automatically drives driving devices such as an air cannon device, a hopper wall vibrator, a hopper door electro-hydraulic push rod and the like, thereby realizing the hopper anti-blocking function of the grab ship unloader, has simple operation, can prevent and eliminate the hidden danger of hopper blocking in time, ensures the safe, efficient and stable operation of equipment, adopts a reasonable hopper anti-blocking control method, greatly reduces the risk of the hopper blocking of the grab ship unloader, thereby ensuring the high efficiency and reliability of the equipment operation.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an anti-blocking system disclosed by the invention;
FIG. 2 is a circuit diagram of the anti-blocking system disclosed in the present invention;
FIG. 3 is a wiring diagram of the hopper detection element of the present invention;
FIG. 4 is a diagram of the drive wiring for the bucket wall vibrator of the present invention;
FIG. 5 is a diagram of hopper door control wiring according to the present invention;
FIG. 6 is a wiring diagram of the air cannon control of the present invention;
FIG. 7 is a view of the hopper section arrangement of the present invention;
FIG. 8 is a flow chart of the hopper anti-blocking control in the present invention.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following describes the technical solutions in the embodiments of the present invention clearly and completely with reference to the drawings in the embodiments of the present invention:
after an operator of the grab ship unloader selects the hopper anti-blocking function, the PLC control unit firstly monitors and analyzes the blocking detection switch state, belt weighing flow data on the machine and hopper weighing sensor data in real time, when the phenomena of blocking detection switch action, abnormal reduction of belt scale material flow, disappearance of hopper weight descending trend and the like occur, the phenomenon of hopper blocking is judged to be about to occur, and according to the difference of blocking early warning degrees, corresponding anti-blocking processing operation is carried out through the PLC control unit to automatically control the hopper wall vibrator, the air cannon and the hopper door, so that the hopper anti-blocking function of the grab ship unloader is realized. The hopper anti-blocking system of the grab ship unloader shown in fig. 1 specifically comprises a hopper blocking early warning unit (shown as U1 in the figure), a PLC control unit (shown as U3 in the figure) and a hopper blocking processing unit (shown as U2 in the figure), wherein the hopper blocking early warning unit is arranged in a hopper and feeding area of the grab ship unloader, so that whether the early warning hopper blocks materials or not can be detected conveniently, and the actual operation condition of material flow can be monitored; the hopper blockage processing unit is arranged near the hopper opening, and the blockage PLC control unit which is convenient for processing and dredging the material at the hopper opening is arranged according to the conventional control system of the grab ship unloader and is arranged in the PLC chamber. The hopper putty early warning unit, the hopper putty processing unit and the main PLC control unit are connected and communicated with data through an Ethernet, a Profibus DP bus and a hard wire.
As shown in fig. 3, an LM0 hopper door displacement sensor, an LM1 hopper weighing sensor 1, an LM2 hopper weighing sensor 2, a BG1 jam detection switch, and a K01 jam detection switch relay. The hopper material blockage early warning unit comprises a material blockage detection switch, an on-machine belt scale, a hopper weighing sensor and the like, wherein the material blockage detection switch is a 20-39 type inclined switch in the drawing and is used for detecting material flow blockage at a blanking port, and once the blanking port has a material blockage phenomenon, the material blockage detection switch sends a switching value signal; the belt scale on the machine is a 30-series belt scale system, a 60-12 type speed sensor, a 14 type weighing sensor and an MT3000 controller are arranged in the belt scale system, the controller is used for detecting the instantaneous material flow and the accumulated material flow of the belt by receiving the data of the speed sensor and the weighing sensor, and the data are uploaded through Ethernet protocol communication; the hopper weighing sensor is a pin shaft type pressure sensor and is used for detecting the weight of the hopper and outputting a 4-20mA signal; the hopper door displacement sensor is a linear displacement sensor arranged in an electro-hydraulic push rod of the hopper door and used for measuring the opening degree of the hopper door and outputting a 4-20mA signal. The blockage detection switch is transmitted to a DI module of the main PLC control unit in a hard-wired connection mode.
Further, the hopper blockage processing unit comprises a cab linkage table operating element, a hopper wall vibrator, an air cannon system, a hopper door push rod and other structures; the operating element of the cab linkage table is transmitted to a DI module of the PLC control unit in a hard-wire connection mode, the specific connection mode is shown in figure 2, (S1: an air cannon device automatic/manual mode selection switch, S2: a hopper door adjustment automatic/manual mode selection switch, S3: a hopper wall vibrator automatic/manual mode selection switch), and an air cannon system automatic/manual mode selection switch S1 on the linkage table is used for an operator to select an air cannon system control mode; a hopper door adjustment automatic/manual mode selection switch S2 on the linkage table, which is used for selecting a hopper door adjustment control mode by an operator; an automatic/manual mode selection switch S3 of the bucket wall vibrator on the linkage table is used for selecting the control mode of the bucket wall vibrator by an operator; when above-mentioned three selector switch all set up to automatic mode, the hopper anti-blocking function will be activated, and PLC the control unit is according to data automatic control air bubble system, hopper door adjustment, the bucket wall vibrator that hopper anti-blocking early warning system detected, and then realizes hopper anti-blocking function. As shown in fig. 4, in the wall vibrator drive wiring diagram, Q1 is a wall vibrator incoming line breaker, Q1.1 is a wall vibrator 1 breaker, Q1.2 is a wall vibrator 2 breaker, Q1.3 is a wall vibrator 3 breaker, M1 is a wall vibrator 1, M2 is a wall vibrator 2, M3 is a wall vibrator 3, and K1 is a wall vibrator operating contactor.
The PLC control unit comprises a PLC controller, a DP communication module, an Ethernet switch, a remote substation DP module, an AI module, a DI module and a DO module. The PLC controller regulates and controls the working process of the grab ship unloader in real time, the PLC control unit is in data communication with a remote substation through a DP communication module and a remote substation DP module by adopting a Profibus DP protocol, the PLC control unit is in data communication with a belt scale by adopting a TCP/IP protocol through an Ethernet switch, the AI module is used for receiving detection information transmitted by a hopper door displacement sensor and a hopper weighing sensor, the DI module is used for receiving data information transmitted by a material blockage detection switch, the PLC controller is used for driving and controlling a hopper wall vibrator and an air cannon through a DO module, and in the process of the drawing, K4 is a hopper door electrohydraulic push rod pump operating contactor, S01 is a hopper door closed electromagnetic valve, S02 is a hopper door open electromagnetic valve, Q4 is a hopper door electrohydraulic push rod pump breaker, and M4 is a hopper door electrohydraulic push rod pump. FIG. 6 shows: k5 is an air cannon apparatus pump operating contactor, S03 is an air cannon apparatus 1 solenoid valve, S04 is an air cannon apparatus 2 solenoid valve, S05 is an air cannon apparatus 3 solenoid valve, Q5 air cannon apparatus pump inlet line breaker, and M5 is an air cannon apparatus pump. FIG. 7 shows (in the figure, 1 represents a hopper door electrohydraulic push rod, 2 represents an air cannon device, and 3 represents a hopper wall vibrator).
After the hopper anti-blocking function is activated, the PLC control unit firstly performs test run detection on the air gun system, the hopper door drive and the hopper wall vibrator, and after the three verify that the operation is normal, the hopper anti-blocking function is formally started. The PLC control unit monitors a belt scale signal, a hopper weighing sensor signal and a blocking detection switch signal in real time, and when the blocking detection switch acts, the hopper weight descending trend disappears abnormally or the belt scale material flow signal is interrupted abnormally, the PLC control unit sends out hopper blocking early warning, and carries out hopper dredging processing by sequentially carrying out striking action of a hopper wall vibrator, arch breaking action of an air cannon system and opening action of a hopper door, and blocking faults are eliminated. On the other hand, when the grab ship unloader works normally, the PLC control unit drives the bucket wall vibrator to perform striking action at regular time, so that materials are prevented from being stuck on the bucket wall; meanwhile, the PLC control unit detects and analyzes signals of the weighing sensor of the hopper in real time, and when the hopper is in an unbalanced load condition, the PLC control unit automatically controls the air cannons on the corresponding sides to break the arch, so that the hopper blockage fault caused by the accumulation of materials on the hopper wall on one side is avoided.
The invention discloses a hopper anti-blocking system of a grab ship unloader, which has the following working modes:
and S1, in the working process of the grab ship unloader, operating personnel operate at the cab linkage table to apply for activating the hopper anti-blocking function.
S2: after receiving the application for activating the hopper anti-blocking function, the PLC control unit performs test operation verification on the hopper wall vibrator, the air cannon and the hopper door mechanism in sequence, and after the mechanism verifies that the operation is normal, the hopper anti-blocking function is formally activated.
S3: the PLC control unit starts to detect and analyze the detection data of the hopper material blockage early warning system in real time and carries out material blockage early warning judgment; the concrete blockage early warning judgment formula is as follows:
the PLC control unit receives the information of the instantaneous material flow and the accumulated material flow of the belt conveyed by the belt scale, and analyzes and judges according to a hopper material blockage early warning judgment formula:
(W01*V01-W00*V00)*ΔT<K0；
wherein W01Is the current weight of the belt scale, V01Is the current running speed of the belt scale, W00For a scanning cycle weight, V, on a belt scale00Is a scanning cycle speed on the belt scale, Delta T is a system scanning cycle time, K0The method is characterized by comprising the steps of providing a belt scale flow fluctuation alarm threshold value, judging that the material flow of the belt scale is abnormally interrupted when a calculated value is smaller than the belt scale flow fluctuation alarm threshold value, and sending a material blocking early warning.
According to the detection data transmitted by the hopper weighing sensor, the following judgment is carried out by adopting a hopper material blockage early warning judgment formula:
WHP1＝a(XHPWS1+XHPLS1)+b；
WHP0＝a(XHPWS0+XHPLS0)+b；
(WHP1-WHP0)/ΔT>KHP0；
WHP1at the current hopper weight, WHP0Is a previous scanPeriodic hopper weight, XHPWS1For the current hopper sea side weighing sensor value, XHPLS1For the current hopper landside weighing sensor value, XHPWS0For the last scanning cycle the value of the hopper sea-side weighing sensor, XHPLS0The value of the hopper landside weighing sensor in the previous scanning period is a, a is a hopper weight conversion proportionality coefficient, b is a hopper weight conversion compensation coefficient, delta T is the system scanning period time, KHP0And judging a threshold value for abnormal interruption of the hopper weight descending trend. When the feeding system operates normally and the blanking time of the grab bucket is not used, the calculated value is larger than the abnormal interruption judgment threshold value of the weight descending trend of the hopper, the abnormal interruption of the weight descending trend of the hopper is judged, and the material blockage early warning is sent out.
And (3) a hopper unbalance loading early warning judgment process adopts a hopper unbalance loading early warning formula:
A＝(XHPWS-XHPLS)/(XHPWS+XHPLS)；
XHPWSis the value of a hopper sea side weighing sensor, XHPLSThe numerical value of a weighing sensor on the land side of the hopper, and A is the unbalance loading proportion of the hopper. When A is more than 20%, indicating that the material unbalance loading at the sea side is serious, and sending a sea side material blockage early warning; when A is less than-20%, indicating that the material unbalance loading on the land side is serious, and sending a land side material blocking early warning.
And S4, the PLC control unit correspondingly drives the hopper wall vibrator and the air cannon device at the corresponding positions to perform material blockage processing operation according to the hopper material blockage early warning judgment data in the third step, and meanwhile, when the hopper is seriously blocked by materials, the opening of the hopper door is properly and automatically adjusted, so that the materials are conveniently dredged.
S5: after the blockage processing operation is completed, the feeding system recovers to a normal operation mode, and simultaneously, blockage early warning monitoring is carried out in real time, so that safe, efficient and stable operation of the feeding system of the equipment is ensured.
Example (b):
the hopper anti-blocking function of the grab ship unloader equipped with the hopper wall vibrator, the air cannon, and the belt scale will be described as an example. The control flow is shown in FIG. 8: after the application of the hopper anti-blocking function, the PLC control unit firstly confirms the operation states of an air gun, a hopper door and a hopper wall vibrator in the blocking processing system in sequence, and if the operation is confirmed to be normal, the hopper anti-blocking function is activated. After the hopper anti-blocking function is activated, the PLC control unit carries out blocking early warning monitoring in a real-time hopper area, and when the hopper blocking early warning system generates blocking early warning (blocking detection switch action, abnormal reduction of material flow of the belt scale and disappearance of hopper weight descending trend), the PLC control unit sends out an instruction, and the hopper blocking processing system is automatically started. Under the control of the PLC control unit, the hopper blockage processing unit automatically sends blockage dredging driving instructions to the hopper wall vibrator, the air cannon and the hopper door in sequence, after the operation is completed, the PLC control unit carries out blockage early warning monitoring on the hopper area again, if the hopper blockage early warning is still not eliminated, the hopper blockage processing system is automatically controlled to carry out blockage dredging driving action again until the hopper blockage early warning is eliminated, after the hopper blockage early warning is eliminated, the hopper area feeding system recovers normal operation, and the hopper blockage preventing function is completed.
The hopper anti-blocking system of the grab ship unloader disclosed by the invention can realize the hopper anti-blocking function of the grab ship unloader, timely prevent and eliminate the hidden danger of hopper blocking, ensure the safe, efficient and stable operation of equipment, improve the intelligent level of the equipment and reduce the labor intensity of operators and wharf operation and maintenance personnel to a certain extent. The anti-blocking system for the hopper of the grab ship unloader disclosed by the invention can reduce the risk of blocking the hopper of equipment, ensure the high efficiency and reliability of the operation of the grab ship unloader and greatly increase the market core competitiveness of the grab ship unloader product.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The utility model provides a grab ship unloaders hopper anti-blocking system which characterized in that: comprises that
The hopper material blockage early warning unit is arranged in a hopper and a feeding area of the grab ship unloader and used for detecting whether the hopper is blocked or not and monitoring the actual operation condition of material flow;
the PLC control unit is used for receiving the material blocking state and the material flow actual operation state transmitted by the hopper material blocking early warning unit, reading a belt scale working state signal, a hopper weighing signal and a material blocking detection switch signal from the received information, judging whether a material blocking detection switch action is abnormal, whether the hopper weight has a descending trend or not and whether a belt scale material flow signal is abnormal or not, and if so, sending an early warning signal, automatically adjusting the opening of the hopper and outputting a corresponding operation instruction for controlling material blocking;
and the hopper blockage processing unit receives the control instruction transmitted by the PLC control unit and conducts dredging processing on the blockage condition of the hopper opening.
2. The grab ship unloader hopper anti-blocking system of claim 1, further characterized by: the hopper material blockage early warning unit comprises a material blockage detection switch, an on-machine belt scale, a hopper weighing sensor and a hopper door displacement sensor; the material blockage detection switch detects material flow blockage state information at a blanking opening, the belt scale on the machine detects instantaneous material flow and accumulated material flow information of a belt, the hopper weighing sensor detects hopper weight information in real time, and the hopper door displacement sensor detects hopper opening state information.
3. The grab ship unloader hopper anti-blocking system of claim 1, further characterized by: the PLC control unit comprises a PLC controller, a DP communication module, an Ethernet switch, a remote substation DP module, an AI module, a DI module and a DO module;
the PLC controller regulates and controls the working process of the grab ship unloader in real time, the PLC control unit is in data communication with a remote substation through a DP communication module and a remote substation DP module by adopting a Profibus DP protocol, the PLC control unit is in data communication with the belt weigher by adopting a TCP/IP protocol through an Ethernet switch, the AI module is used for receiving detection information transmitted by a hopper door displacement sensor and a hopper weighing sensor, the DI module is used for receiving data information transmitted by a material blockage detection switch, and the PLC controller is used for driving and controlling a hopper wall vibrator and an air cannon through the DO module.
4. The grab ship unloader hopper anti-blocking system of claim 1, further characterized by: the PLC control unit carries out real-time detection, analysis and blockage early warning judgment on detection data transmitted by the hopper blockage early warning unit, and the following modes are specifically adopted:
the instantaneous material flow and the accumulative total material flow information of the belt conveyed by the belt scale on the receiver adopt a hopper material blockage early warning judgment formula to judge whether the material flow of the belt scale is abnormal or not:
(W01*V01-W00*V00)*ΔT<K0；
wherein W01Is the current weight of the belt scale, V01Is the current running speed of the belt scale, W00For a scanning cycle weight, V, on a belt scale00Is a scanning cycle speed on the belt scale, Delta T is a system scanning cycle time, K0The flow fluctuation alarm threshold value of the belt scale is adopted, when the calculated value is smaller than the flow fluctuation alarm threshold value of the belt scale, the abnormal interruption of the material flow of the belt scale is judged, and a material blocking early warning is sent out;
receiving hopper weight information transmitted by a hopper weighing sensor to judge whether the hopper weight has a descending trend:
WHP1＝a(XHPWS1+XHPLS1)+b；
WHP0＝a(XHPWS0+XHPLS0)+b；
(WHP1-WHP0)/ΔT>KHP0；
WHP1at the current hopper weight, WHP0For the weight of the hopper, X, of the previous scanning cycleHPWS1For the current hopper sea side weighing sensor value, XHPLS1For the current hopper landside weighing sensor value, XHPWS0Hopper seaside scale for previous scanning periodRetransmission sensor value, XHPLS0The value of the hopper landside weighing sensor in the previous scanning period is a, a is a hopper weight conversion proportionality coefficient, b is a hopper weight conversion compensation coefficient, delta T is the system scanning period time, KHP0Judging a threshold value for abnormal interruption of the hopper weight descending trend, and when the feeding system operates normally and is in non-grab bucket blanking time, if the calculated value is greater than the judgment threshold value, judging that the hopper weight descending trend is abnormal interruption, and sending out a material blocking early warning;
hopper unbalance loading early warning judgment process
A＝(XHPWS-XHPLS)/(XHPWS+XHPLS)；
XHPWSIs the value of a hopper sea side weighing sensor, XHPLSThe numerical value of a weighing sensor on the land side of the hopper is shown, A is the unbalance loading proportion of the hopper, and when A is more than 20%, the unbalance loading of the material on the sea side is serious, and the early warning of the material blockage on the sea side is sent out; and when A is less than-20%, the land side material unbalance loading is serious, and land side material blockage early warning is sent out.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940358A (en) * | 2022-05-17 | 2022-08-26 | 交通运输部天津水运工程科学研究所 | Intelligent control system and method for constant material flow of electric hopper of coal wharf |
| CN115959442A (en) * | 2023-01-11 | 2023-04-14 | 广东天圣网络科技有限公司 | Intelligent control method and system for constant material flow of electric hopper of coal wharf |
| CN116300665A (en) * | 2023-05-24 | 2023-06-23 | 山东宏桥新型材料有限公司 | Linkage interlocking control circuit of air cannon |
| CN116620877A (en) * | 2023-07-21 | 2023-08-22 | 成都考拉悠然科技有限公司 | Method and system for detecting and processing blanking cabinet blocking materials based on deep learning |
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