CN115826453A - Intelligent monitoring control system and method for fully mechanized coal mining face conveying equipment - Google Patents
Intelligent monitoring control system and method for fully mechanized coal mining face conveying equipment Download PDFInfo
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Abstract
The invention discloses an intelligent monitoring control system and method for fully mechanized coal mining face conveying equipment. The six systems are communicated with a centralized control platform, and an intelligent scheme for recognizing the chain clamping and chain breaking state and position of the scraper conveyor, soft starting and intelligent speed regulation of the scraper conveyor, automatic tensioning control of a tail chain, load and coal flow monitoring, linkage of the scraper conveyor and a coal mining machine, intelligent tensioning of a belt conveyor and automatic control of a telescopic self-moving tail of the belt conveyor is provided aiming at the problems of chain clamping and chain breaking accidents of the scraper conveyor and tightness of the tail chain.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to an intelligent fully-mechanized coal mining face fault detection and automatic control device and method, and specifically relates to an intelligent monitoring control system and method for fully-mechanized coal mining face conveying equipment.
Background
The intelligent fully-mechanized coal mining face is an important component of the mining development of a well mine, and comprises a belt conveyor and a scraper conveyor which is one of three machines of the fully-mechanized coal mining face, and the performance reliability, the operation stability, the fault diagnosis comprehensiveness, the timeliness and the intelligent degree of the fully-mechanized coal mining face are important technical bases for ensuring the intelligent operation of the mine.
At present, the fully mechanized coal mining face conveying system mainly has the following two problems:
on one hand, the scraper conveyor is adopted, and the load of the scraper conveyor is continuously changed along with factors such as cutting speed of a coal cutter, coal quantity, transition of a hydraulic support and the like in the operation process of the scraper conveyor, so that a scraper chain is tight and loose; and because the chain runs under high load for a long time, the chain ring gradually grows due to plastic deformation, so that the chain is loosened. Therefore, the phenomena of chain blocking, chain jumping, chain stacking, chain floating and the like often occur, even safety accidents occur, and the normal operation of the scraper conveyor and the service life of the chain are seriously influenced.
On the other hand, the belt conveyor needs to be added with an automatic control system for belt tensioning and an automatic tracking system for the tail of the belt conveyor.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art and provides an intelligent monitoring control system and method for conveying equipment on a fully mechanized mining face, which aim at the problems of chain clamping and chain breaking accidents of a scraper conveyor and tightness of a tail chain in combination with equipment operation state parameters from the direction of linkage relation and control parameters of the conveyor and a coal mining machine, and provide an intelligent scheme aiming at the identification of the state and position of the chain clamping and the chain breaking of the scraper conveyor, the soft start and intelligent speed regulation of the scraper conveyor, the automatic tensioning control of the tail chain, the monitoring of load capacity and coal flow, the linkage of the scraper conveyor and the coal mining machine, the intelligent tensioning of a belt machine and the automatic control of a telescopic self-moving tail of the belt machine.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a combine and adopt working face conveying equipment intelligent monitoring and control system, conveying equipment includes scraper conveyor and belt conveyor, and monitoring and control system includes host computer centralized control platform, ethernet, network switch, flameproof and this safety type controller, scraper conveyor trouble intelligent monitoring system, belt conveyor trouble intelligent monitoring system in the pit.
The underground upper computer centralized control platform is used for monitoring and controlling the whole system in real time; the Ethernet is used for data transmission among various systems; the network switch is used for converting and transmitting data; the explosion-proof and intrinsic safety type controller is used for receiving a control signal of an underground upper computer centralized control platform, converting data and transmitting data through an Ethernet switch, and then controlling the intelligent monitoring system for the faults of the scraper conveyor and the intelligent monitoring system for the faults of the belt conveyor.
The intelligent failure monitoring system for the scraper conveyor comprises a scraper conveyor coal flow monitoring subsystem, an automatic tensioning control subsystem for scraper conveyor chains, a scraper conveyor and coal mining machine start-stop linkage control subsystem and a scraper conveyor soft start control subsystem.
The intelligent belt conveyor fault monitoring system comprises an automatic belt conveyor tensioning subsystem and an automatic belt moving tail control subsystem.
As a further preferable aspect of the present invention, the scraper conveyor coal flow rate monitoring subsystem includes an intrinsically safe two-dimensional laser scanner for acquiring a coal amount variation signal.
The coal quantity state is cached in real time through the two-dimensional laser scanning scraper conveyor, the calculation processing is carried out through an internal algorithm processor, and the processed coal quantity data is converted into visual coal quantity data and is transmitted to the underground upper computer centralized control platform through the Ethernet and the network switch.
As a further preferred aspect of the present invention, the scraper conveyor chain automatic tensioning control subsystem includes a tensioning cylinder, a proportional solenoid valve, and a pressure sensor.
When the equipment is started, applying pretension force to a scraper chain of a scraper conveyor chain; the explosion-proof and intrinsic safety controller controls the tensioning oil cylinder through the proportional electromagnetic valve according to a coal quantity change signal and a pressure sensor detection signal in the working process, so that the tightness of the scraper chain is adjusted.
As a further preferable mode of the invention, the scraper conveyor and coal mining machine start-stop linkage control subsystem comprises a frequency converter and a PLC.
The frequency converter, the PLC and the underground upper computer centralized control platform are connected through the Ethernet, and the underground upper computer centralized control platform is preset with control logic, so that the coal mining machine and the scraper conveyor are started or stopped according to time sequence and set time intervals, and the machine is stopped according to set instructions when the scraper conveyor meets working conditions such as chain clamping, chain breaking and the like.
As a further preferred aspect of the present invention, the scraper conveyor soft start control subsystem is integrated in the centralized control platform of the downhole upper computer, the scraper conveyor soft start control subsystem sets a scraper conveyor soft start mode, including a speed regulation mode and control logic when the scraper conveyor is fully loaded and started, a speed regulation mode and control logic when the scraper conveyor is unloaded and started, and a speed regulation mode and control logic when the scraper conveyor is restarted after braking, and the scraper conveyor soft start control subsystem can set other start speeds according to actual conditions to achieve the adjustable start speed of the scraper conveyor.
As a further preferred aspect of the present invention, the belt conveyor automatic tensioning subsystem comprises a tension sensor, a tension buffering device and a hydraulic station; the underground upper computer centralized control platform automatically controls the belt conveyor through the tension buffer device according to the difference value between the tension value monitored by the tension sensor and the preset value; the tension buffer device comprises a buffer oil cylinder and an energy accumulator, and the hydraulic station is used for supplying oil to the tension buffer device.
As a further preferred embodiment of the present invention, the automatic control subsystem of the belt self-moving tail comprises one explosion-proof and intrinsic safety type controller, four leveling cylinders, two pushing cylinders, four lateral moving cylinders, two height-adjusting cylinders, seven two-position two-way valves, a power medium is high-pressure emulsion, and a hydraulic check valve is arranged in a liquid inlet loop of each of the four leveling cylinders to ensure that the state of the rack is maintained; with the advancing of coal cutting of the coal cutter, the advancing oil cylinder is in charge of advancing from the moving tail; the leveling oil cylinder is responsible for leveling work when the side deviates, and the side shifting oil cylinder and the heightening oil cylinder are operated when the deviation is serious, so that the rack is improved and corrected until the normal position is recovered.
A detection and control method of an intelligent monitoring and control system of fully mechanized coal mining face conveying equipment comprises the following steps:
step 1, obtaining state signals of a scraper conveyor and a belt conveyor through a scraper conveyor coal flow monitoring system, a scraper conveyor chain automatic tensioning control subsystem, a scraper conveyor and coal mining machine start-stop linkage control subsystem, a scraper conveyor soft start control subsystem, a belt tensioning control subsystem and a self-moving tail control subsystem;
step 2, converting the control signal into a level signal through a network switch, sending the level signal to an underground upper computer centralized control platform through an Ethernet, and carrying out fault detection on the control signal by the underground upper computer centralized control platform according to the level signal;
and 3, monitoring and controlling the scraper conveyor and the belt conveyor by the underground upper computer centralized control platform according to signals fed back by the scraper conveyor fault intelligent monitoring system and the belt conveyor fault intelligent monitoring system and the preset control logic per se.
Further preferably, the soft start control subsystem of the scraper conveyor sets a soft start mode of the scraper conveyor, including a speed regulation mode and control logic when the scraper conveyor is started fully, a speed regulation mode and control logic when the scraper conveyor is started in an idle state, and a speed regulation mode and control logic when the scraper conveyor is restarted after being braked.
When the scraper conveyor is started in a full-load mode, namely the variable frequency system of the scraper conveyor is used, the current of the scraper conveyor is limited to be always smaller than the rated current, so that the scraper conveyor can achieve the corresponding torque in the slow running process, and the transmission clearance between anchor chains can be eliminated.
And (4) no-load starting of the scraper conveyor, namely constant-frequency cold starting of the scraper conveyor.
The scraper conveyor is restarted after braking, namely when the scraper conveyor has the accident of chain blocking and chain breaking, the scraper conveyor is immediately stopped; and after the scraper conveyor is repaired, restarting in a full-load starting mode.
As a further preferred aspect of the invention, the belt conveyor automatic tensioning subsystem has two modes of automatic monitoring, controlled belt tensioning mode and manual adjustment control.
In an automatic control mode, the system starts to enter a self-checking state after being started, and if the tension value monitored by the tension sensor is lower than or equal to a preset fault lower limit value, the system is started in a self-protection mode, and all operations are invalid; and if the tension value monitored by the tension sensor is higher than the preset fault lower limit value, starting the hydraulic station next step, then supplying oil to a tension buffer device consisting of a buffer oil cylinder and an energy accumulator until the oil supply pressure reaches the preset upper limit value, and stopping oil filling.
And the underground upper computer centralized control platform controls the tension buffer device according to the running state of the belt conveyor fed back by the tension sensor, so that the tension buffer device releases pressure and reduces the belt tension.
The invention has the following beneficial effects:
1. the invention provides an intelligent scheme aiming at the chain clamping and chain breaking state and position recognition of a scraper conveyor, soft start and intelligent speed regulation of the scraper conveyor, automatic tensioning control of a tail chain, load and coal flow monitoring, linkage of the scraper conveyor and a coal mining machine, intelligent tensioning of a belt conveyor and automatic control of a telescopic self-moving tail of the belt conveyor by combining equipment operation state parameters and aiming at the chain clamping and chain breaking accidents of the scraper conveyor and the problem of tightness of the tail chain in time from the direction of linkage relation and control parameters of the conveyor and the coal mining machine.
2. The invention solves the problem that the scraper chain is tight and loose when the load of the scraper conveyor continuously changes along with factors such as the cutting speed of a coal mining machine, the coal quantity, the transition of a hydraulic support and the like in the operation process, and overcomes the defect that the chain is loose because the chain is gradually increased due to the plastic deformation of the chain ring when the chain runs under high load for a long time. The phenomena of chain blocking, chain jumping, chain stacking, chain floating and the like are avoided, and the operation and the service life of the scraper conveyor are prolonged.
3. According to the invention, a belt tensioning automatic control and belt conveyor tail automatic following system is added for the belt conveyor, so that the re-working and re-production efficiency after the occurrence of the chain clamping and breaking accidents of the scraper conveyor is improved, the economic loss of enterprises is reduced, the intelligent system of the fully-mechanized mining face is perfected, the production target of 'reducing personnel and improving efficiency' is achieved, and the technical support is provided for the intelligent construction of the fully-mechanized mining face.
Drawings
Fig. 1 is a schematic diagram of an intelligent monitoring and control system of a fully mechanized coal mining face conveying device.
FIG. 2 is a flow chart of an intelligent monitoring and control method of the fully mechanized coal mining face conveying equipment.
Detailed Description
In the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
As shown in figure 1, the intelligent monitoring and control system for the fully mechanized coal mining face conveying equipment comprises a scraper conveyor and a belt conveyor, and comprises an underground upper computer centralized control platform, an Ethernet, a network switch, an explosion-proof and intrinsic safety controller, an intelligent scraper conveyor fault monitoring system and an intelligent belt conveyor fault monitoring system.
The underground upper computer centralized control platform is used for monitoring and controlling the whole system in real time; the Ethernet is used for data transmission among all systems; the network switch is used for converting and transmitting data; the explosion-proof and intrinsic safety type controller is used for receiving a control signal of an underground upper computer centralized control platform, converting data and transmitting data through an Ethernet switch, and then controlling the intelligent monitoring system for the faults of the scraper conveyor and the intelligent monitoring system for the faults of the belt conveyor.
The intelligent fault monitoring system for the scraper conveyor comprises a scraper conveyor coal flow monitoring subsystem, a scraper conveyor chain automatic tensioning control subsystem, a scraper conveyor and coal cutter start-stop linkage control subsystem and a scraper conveyor soft start control subsystem.
The intelligent belt conveyor fault monitoring system comprises an automatic belt conveyor tensioning subsystem and an automatic belt self-moving tail control subsystem.
The coal flow monitoring subsystem of the scraper conveyor comprises an intrinsic safety type two-dimensional laser scanner and is used for acquiring a coal quantity change signal on the scraper conveyor, and the signal is also an input signal and a control basis of the automatic tensioning control subsystem of the scraper conveyor chain, the start-stop linkage control subsystem of the scraper conveyor and the coal mining machine and the soft start control subsystem of the scraper conveyor.
The coal quantity state is cached in real time through the two-dimensional laser scanning scraper conveyor, the calculation processing is carried out through an internal algorithm processor, and the processed coal quantity data is converted into visual coal quantity data and is transmitted to the underground upper computer centralized control platform through the Ethernet and the network switch.
The automatic tensioning control subsystem of the scraper conveyor chain comprises a tensioning oil cylinder, a proportional solenoid valve and a pressure sensor.
When the equipment is started, applying pretension force to a scraper chain of a scraper conveyor chain; the explosion-proof and intrinsic safety controller controls the tensioning oil cylinder through the proportional electromagnetic valve according to a coal quantity change signal and a pressure sensor detection signal in the working process, so that the tightness of the scraper chain is adjusted.
The scraper conveyor and coal mining machine start-stop linkage control subsystem comprises a frequency converter and a PLC.
The frequency converter, the PLC and the underground upper computer centralized control platform are connected through the Ethernet, and the underground upper computer centralized control platform is preset with control logic, so that the coal mining machine and the scraper conveyor are started or stopped according to time sequence and set time intervals, and the coal mining machine and the scraper conveyor are stopped according to set instructions when the scraper conveyor meets working conditions such as chain jamming and chain breakage.
The soft start control subsystem of the scraper conveyor is integrated on an underground upper computer centralized control platform, the soft start control subsystem of the scraper conveyor sets the soft start mode of the scraper conveyor, and comprises a speed regulation mode and a control logic when the scraper conveyor is fully loaded and started, a speed regulation mode and a control logic when the scraper conveyor is unloaded and started, and a speed regulation mode and a control logic when the scraper conveyor is restarted after being braked, and the soft start control subsystem of the scraper conveyor can set other start speeds according to actual conditions, so that the start speed of the scraper conveyor can be adjusted.
The automatic tensioning subsystem of the belt conveyor comprises a tension sensor, a tension buffer device and a hydraulic station; the underground upper computer centralized control platform automatically controls the belt conveyor through the tension buffer device according to the difference value between the tension value monitored by the tension sensor and a preset value; the tension buffer device comprises a buffer oil cylinder and an energy accumulator, and the hydraulic station is used for supplying oil to the tension buffer device.
The automatic control subsystem of the belt self-moving machine tail comprises one explosion-proof and intrinsic safety type controller, four leveling oil cylinders, two pushing oil cylinders, four lateral moving oil cylinders, two heightening oil cylinders, seven two-position two-way valves, high-pressure emulsion as power medium, and hydraulic one-way valves arranged on liquid inlet loops of the four leveling cylinders to ensure that the state of the machine frame is maintained; the pushing oil cylinder is responsible for pushing and following the self-moving tail along with the pushing of the coal cutter to cut coal; the leveling oil cylinder is responsible for leveling work when the side deviates, and the side shifting oil cylinder and the heightening oil cylinder are operated when the deviation is serious, so that the rack is improved and corrected until the normal position is recovered.
The coal flow monitoring subsystem of the scraper conveyor and corresponding sensor hardware thereof are connected with a network switch through Ethernet, so as to be indirectly connected with an underground upper computer centralized control platform (hereinafter referred to as a centralized control platform); the system comprises a scraper conveyor, a coal mining machine start-stop linkage control subsystem, a scraper conveyor soft start control subsystem, a scraper conveyor chain automatic tensioning control subsystem, a network switch and an underground dispatching center, wherein sensors and related hardware used by the scraper conveyor and the coal mining machine start-stop linkage control subsystem share an explosion-proof and intrinsic safety controller A, and the controller is connected with the network switch through the Ethernet so as to be respectively communicated with the centralized control platform and the underground dispatching center; the sensor and related hardware used by the automatic belt conveyor tensioning control subsystem and the automatic belt moving tail control subsystem share one explosion-proof and intrinsic safety controller B, and the controller is connected with a network switch through the Ethernet, so that the controller is respectively communicated with a centralized control platform and an aboveground dispatching center.
As shown in fig. 2, a detection and control method of an intelligent monitoring and control system for fully mechanized coal mining face conveying equipment includes the following steps:
step 1, acquiring state signals of a scraper conveyor and a belt conveyor through a scraper conveyor coal flow monitoring system, a scraper conveyor chain automatic tensioning control subsystem, a scraper conveyor and coal mining machine start-stop linkage control subsystem, a scraper conveyor soft start control subsystem, a belt tensioning control subsystem and a self-moving tail control subsystem;
step 2, converting the control signal into a level signal through a network switch, sending the level signal to an underground upper computer centralized control platform through an Ethernet, and carrying out fault detection on the control signal by the underground upper computer centralized control platform according to the level signal;
and 3, monitoring and controlling the scraper conveyor and the belt conveyor by the underground upper computer centralized control platform according to signals fed back by the scraper conveyor fault intelligent monitoring system and the belt conveyor fault intelligent monitoring system and the preset control logic per se.
The soft start control subsystem of the scraper conveyer sets the soft start mode of the scraper conveyer, including the speed regulation mode and the control logic when the scraper conveyer is fully loaded and started, the speed regulation mode and the control logic when the scraper conveyer is unloaded and started, and the speed regulation mode and the control logic when the scraper conveyer is restarted after being braked.
When the scraper conveyor is started in a full-load mode, namely the variable frequency system of the scraper conveyor is used, the current of the scraper conveyor is limited to be always smaller than the rated current, so that the scraper conveyor can achieve the corresponding torque in the slow running process, and the transmission clearance between anchor chains can be eliminated.
And (4) starting the scraper conveyor in no-load mode, namely, starting the scraper conveyor at a fixed frequency in a cold mode.
The scraper conveyor is restarted after braking, namely when the scraper conveyor has the accident of chain blocking and chain breaking, the scraper conveyor is immediately stopped; and after the scraper conveyor is repaired, restarting in a full-load starting mode.
The automatic tensioning subsystem of the belt conveyor has two modes of automatic monitoring, belt tensioning control and manual adjustment control.
In an automatic control mode, the system starts to enter a self-checking state after being started, and if the tension value monitored by the tension sensor is lower than or equal to a preset fault lower limit value, the system is started in a self-protection mode, and all operations are invalid; and if the tension value monitored by the tension sensor is higher than the preset fault lower limit value, starting the hydraulic station next step, then supplying oil to a tension buffer device consisting of a buffer oil cylinder and an energy accumulator until the oil supply pressure reaches the preset upper limit value, and stopping oil filling.
And the underground upper computer centralized control platform controls the tension buffer device according to the running state of the belt conveyor fed back by the tension sensor, so that the tension buffer device releases pressure and reduces the belt tension.
The invention provides an intelligent scheme aiming at the chain clamping and chain breaking state and position recognition of a scraper conveyor, soft start and intelligent speed regulation of the scraper conveyor, automatic tensioning control of a tail chain, load and coal flow monitoring, linkage of the scraper conveyor and a coal mining machine, intelligent tensioning of a belt conveyor and automatic control of a telescopic self-moving tail of the belt conveyor by combining equipment operation state parameters and aiming at the chain clamping and chain breaking accidents of the scraper conveyor and the problem of tightness of the tail chain in time from the direction of linkage relation and control parameters of the conveyor and the coal mining machine. Meanwhile, the problem that the scraper chain is tight and loose when the load of the scraper conveyor is continuously changed along with factors such as the cutting speed of a coal mining machine, the coal quantity and the transition of a hydraulic support in the operation process is solved, and the defect that the chain is loose due to the fact that the chain is gradually increased due to plastic deformation when the chain runs under high load for a long time is overcome. The phenomena of chain blocking, chain jumping, chain stacking, chain floating and the like are avoided, and the operation and the service life of the scraper conveyor are prolonged.
According to the invention, a belt tensioning automatic control and belt conveyor tail automatic following system is added to the belt conveyor, so that the re-work and re-production efficiency after the occurrence of the chain blocking and breaking accidents of the scraper conveyor is improved, the economic loss of enterprises is reduced, the intelligent system of the fully-mechanized mining face is perfected, the production target of 'personnel reduction and efficiency improvement' is achieved, and the technical support is provided for the intelligent construction of the fully-mechanized mining face.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent changes may be made within the technical spirit of the present invention, and the technical scope of the present invention is also covered by the present invention.
Claims (10)
1. The utility model provides a combine and adopt working face conveying equipment intelligent monitoring and control system, conveying equipment includes scraper conveyor and belt conveyor, its characterized in that: the monitoring and control system comprises an underground upper computer centralized control platform, an Ethernet, a network switch, an explosion-proof and intrinsic safety controller, a scraper conveyor fault intelligent monitoring system and a belt conveyor fault intelligent monitoring system;
the underground upper computer centralized control platform is used for monitoring and controlling the whole system in real time;
the Ethernet is used for data transmission among the systems;
the network switch is used for converting and transmitting data;
the explosion-proof and intrinsic safety type controller is used for receiving a control signal of an underground upper computer centralized control platform, converting data and transmitting data through an Ethernet switch, and controlling the intelligent monitoring system for the faults of the scraper conveyor and the intelligent monitoring system for the faults of the belt conveyor;
the intelligent fault monitoring system for the scraper conveyor comprises a scraper conveyor coal flow monitoring subsystem, a scraper conveyor chain automatic tensioning control subsystem, a scraper conveyor and coal cutter start-stop linkage control subsystem and a scraper conveyor soft start control subsystem;
the belt conveyor fault intelligent monitoring system comprises a belt conveyor automatic tensioning subsystem and a belt self-moving tail automatic control subsystem.
2. The intelligent monitoring and control system for fully mechanized coal mining face conveying equipment according to claim 1, wherein: the coal flow monitoring subsystem of the scraper conveyor comprises an intrinsic safety type two-dimensional laser scanner and is used for acquiring a coal quantity change signal;
the coal quantity state is cached in real time through the two-dimensional laser scanning scraper conveyor, the calculation processing is carried out through an internal algorithm processor, and the processed coal quantity data is converted into visual coal quantity data and is transmitted to the underground upper computer centralized control platform through the Ethernet and the network switch.
3. The intelligent monitoring and control system for fully mechanized coal mining face conveying equipment according to claim 2, characterized in that: the automatic tensioning control subsystem of the scraper conveyor chain comprises a tensioning oil cylinder, a proportional electromagnetic valve and a pressure sensor;
when the equipment is started, applying a pre-tension force to a scraper chain of a scraper conveyor chain; the explosion-proof and intrinsic safety controller controls the tensioning oil cylinder through the proportional electromagnetic valve according to a coal quantity change signal and a pressure sensor detection signal in the working process, so that the tightness of the scraper chain is adjusted.
4. The intelligent monitoring and control system for the fully mechanized coal mining face conveying equipment according to claim 2, characterized in that: the scraper conveyor and coal mining machine start-stop linkage control subsystem comprises a frequency converter and a PLC;
the frequency converter, the PLC and the underground upper computer centralized control platform are connected through the Ethernet, and the underground upper computer centralized control platform is preset with control logic, so that the coal mining machine and the scraper conveyor are started or stopped according to time sequence and set time intervals, and the coal mining machine and the scraper conveyor are stopped according to set instructions when the scraper conveyor meets working conditions such as chain jamming and chain breakage.
5. The intelligent monitoring and control system for fully mechanized coal mining face conveying equipment according to claim 4, wherein: the soft start control subsystem of the scraper conveyor is integrated on an underground upper computer centralized control platform, the soft start control subsystem of the scraper conveyor sets the soft start mode of the scraper conveyor, and comprises a speed regulation mode and a control logic when the scraper conveyor is fully loaded and started, a speed regulation mode and a control logic when the scraper conveyor is unloaded and started, and a speed regulation mode and a control logic when the scraper conveyor is restarted after being braked, and the soft start control subsystem of the scraper conveyor can set other start speeds according to actual conditions, so that the start speed of the scraper conveyor can be adjusted.
6. The intelligent monitoring and control system for fully mechanized coal mining face conveying equipment according to claim 1, wherein: the automatic tensioning subsystem of the belt conveyor comprises a tension sensor, a tension buffer device and a hydraulic station; the underground upper computer centralized control platform automatically controls the belt conveyor through the tension buffer device according to the difference value between the tension value monitored by the tension sensor and a preset value; the tension buffer device comprises a buffer oil cylinder and an energy accumulator, and the hydraulic station is used for supplying oil to the tension buffer device.
7. The intelligent monitoring and control system for fully mechanized coal mining face conveying equipment according to claim 1, wherein: the automatic control subsystem of the belt self-moving tail comprises one explosion-proof and intrinsic safety type controller, four leveling oil cylinders, two pushing oil cylinders, four lateral moving oil cylinders, two heightening oil cylinders, seven two-position two-way valves, high-pressure emulsion as power medium, and hydraulic one-way valves arranged on liquid inlet loops of the four leveling cylinders to ensure that the state of the machine frame is maintained; with the advancing of coal cutting of the coal cutter, the advancing oil cylinder is in charge of advancing from the moving tail; the leveling oil cylinder is responsible for leveling work when the side deviates, and the side shifting oil cylinder and the heightening oil cylinder are operated when the deviation is serious, so that the rack is improved and corrected until the normal position is recovered.
8. The intelligent monitoring control method for the fully mechanized mining face conveying equipment based on any one of claims 1 to 7 is characterized in that: the method comprises the following steps:
step 1, acquiring state signals of a scraper conveyor and a belt conveyor through a scraper conveyor coal flow monitoring system, a scraper conveyor chain automatic tensioning control subsystem, a scraper conveyor and coal mining machine start-stop linkage control subsystem, a scraper conveyor soft start control subsystem, a belt tensioning control subsystem and a self-moving tail control subsystem;
step 2, converting the control signal into a level signal through a network switch, sending the level signal to an underground upper computer centralized control platform through an Ethernet, and carrying out fault detection on the control signal by the underground upper computer centralized control platform according to the level signal;
and 3, monitoring and controlling the scraper conveyor and the belt conveyor by the underground upper computer centralized control platform according to signals fed back by the scraper conveyor fault intelligent monitoring system and the belt conveyor fault intelligent monitoring system and the preset control logic per se.
9. The intelligent monitoring and control method for the fully mechanized coal mining face conveying equipment according to claim 8, characterized in that: the soft start control subsystem of the scraper conveyer sets the soft start mode of the scraper conveyer, including the speed regulation mode and control logic when the scraper conveyer is started fully, the speed regulation mode and control logic when the scraper conveyer is started in no-load, and the speed regulation mode and control logic when the scraper conveyer is restarted after braking;
the scraper conveyor is started in a full-load mode, namely the current of the scraper conveyor is limited to be always smaller than the rated current through a frequency conversion system of the scraper conveyor, so that the scraper conveyor can achieve the torque of a corresponding degree in the slow running process, and the transmission clearance between anchor chains can be eliminated;
the scraper conveyor is started in an idle load manner, namely, the scraper conveyor is started in a cold mode at a fixed frequency;
the scraper conveyor is restarted after being braked, namely when the scraper conveyor has the accident of chain blocking and chain breaking, the scraper conveyor is immediately stopped; and after the scraper conveyor is repaired, restarting in a full-load starting mode.
10. The intelligent monitoring and control method for the fully mechanized coal mining face conveying equipment according to claim 8, characterized in that: the automatic tensioning subsystem of the belt conveyor has two modes of automatic monitoring, belt tensioning control and manual adjustment control;
in an automatic control mode, the system starts to enter a self-checking state after being started, and if the tension value monitored by the tension sensor is lower than or equal to a preset fault lower limit value, the system is started in a self-protection mode, and all operations are invalid; if the tension value monitored by the tension sensor is higher than the preset fault lower limit value, starting the hydraulic station next step, then supplying oil to a tension buffer device consisting of a buffer oil cylinder and an energy accumulator until the oil supply pressure reaches the preset upper limit value, and stopping oil filling;
and the underground upper computer centralized control platform controls the tension buffer device according to the running state of the belt conveyor fed back by the tension sensor, so that the tension buffer device is relieved in pressure, and the belt tension is reduced.
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| CN202211369194.3A CN115826453A (en) | 2022-11-03 | 2022-11-03 | Intelligent monitoring control system and method for fully mechanized coal mining face conveying equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116216194A (en) * | 2023-04-24 | 2023-06-06 | 冀凯河北机电科技有限公司 | Transition groove, scraper conveyor and intelligent general control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116216194A (en) * | 2023-04-24 | 2023-06-06 | 冀凯河北机电科技有限公司 | Transition groove, scraper conveyor and intelligent general control system |
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