CN110259499B - Method for adjusting working condition of multi-fan combined operation in different places of mine - Google Patents
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- E—FIXED CONSTRUCTIONS
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- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
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Abstract
The embodiment of the invention discloses a method for adjusting the working condition of multi-fan combined operation in different places of a mine, which comprises the following steps: step 100, arranging a sensor group for parameter acquisition in a tunnel at an inlet of a fan, and feeding back data acquired in real time to a control system; 200, simulating a corresponding parameter value by utilizing a mine ventilation three-dimensional simulation system to optimize and calculate a ventilation network, and comparing the parameter value serving as a simulation analysis value with data acquired by a tunnel where a fan is located; 300, adjusting the operating frequency of each fan motor one by one in a feedback adjustment mode according to the comparison result of the working condition parameters of each fan until the data acquired by the sensor group are consistent with the system value, and realizing the real-time combined adjustment of the multiple fans of the mine; the working condition adjusting method can ensure that the working condition of the multi-fan combined operation at different places of the mine adapts to the change of the total ventilation resistance, the production scale and the natural wind pressure of the mine, and meets the requirement of the wind quantity required by the safety production of the mine.
Description
Technical Field
The embodiment of the invention relates to the technical field of mine ventilation working condition adjustment, in particular to a method for adjusting the working condition of multi-fan combined operation of different places of a mine.
Background
The mine fan is important equipment for ensuring safe production of a mine and is responsible for continuously conveying fresh air to the underground to supply personnel with breathing, diluting and discharging harmful gas and floating dust. The ventilation effect of the mine is poor, and people poisoning, gas explosion, pneumoconiosis and other hazards can be caused, so that the effective ventilation of the mine must be ensured. Generally, when the model of the fan is selected according to the air quantity required by the mine and the ventilation resistance of the mine, the ventilation capability of the fan in the easy period and the difficult period of the mine ventilation needs to be considered, namely, the operation condition of the fan is required to be adjustable so as to adapt to the changes of the production scale of the mine, the ventilation resistance of the mine and the natural air pressure, thereby not only meeting the requirement of the air quantity required by the mine production, but also saving the ventilation energy consumption of the mine. Therefore, under different production periods, different production scales and different climatic conditions of the mine, the operation condition of the fan needs to be adjusted by adjusting the operation frequency of the fan motor, so that the repeated investment of mine enterprises is avoided, or the problems of 'big horse pulls a trolley' and low energy utilization efficiency are avoided, and the air supply quantity of the mine is ensured to meet the requirement of safe production.
The operation condition of a single fan is adjusted by mainly detecting the operation parameters (air quantity, air pressure and the like) of the mine fan through a sensor, sending the operation parameters to a PLC control system through an analog-to-digital conversion module for digital filtering, comparison, judgment and operation, and sending a control signal to a frequency converter, so that the rotating speed of a motor is controlled, and the effect of adjusting the operation condition of the fan is achieved. For the combined operation condition of a plurality of fans installed in different places, the types and the operation conditions of the fans are possibly different due to different areas served by the fans, so that the combined operation condition of the fans in different places is not calculated by putting all the fans into mine ventilation system optimization software, and the fans are respectively adjusted according to the method, the problem of mutual influence among the fans in different places is not considered, the stability of the combined operation of the fans is not well controlled, and the problem that the air supply quantity is larger or insufficient in part of operation areas is caused by considering the mutual influence is solved, so that the expected adjustment effect cannot be achieved.
Based on the defects and requirements, the invention aims to provide a method for adjusting the working condition of the multi-fan combined operation at different places of a mine.
Disclosure of Invention
Therefore, the embodiment of the invention provides a method for adjusting the working condition of multi-fan combined operation in different places of a mine, so as to solve the problem that the multi-fan combined operation in different areas cannot be stably controlled in the prior art.
In order to achieve the above object, an embodiment of the present invention provides the following:
a method for adjusting the working condition of the multi-fan combined operation of different places of a mine comprises the following steps:
step 100, arranging a sensor group for parameter acquisition in a tunnel at an inlet of a fan, and feeding back data acquired in real time to a control system;
200, simulating a corresponding parameter value by utilizing a mine ventilation three-dimensional simulation system to optimize and calculate a ventilation network, and comparing the parameter value serving as a simulation analysis value with data acquired by a tunnel where a fan is located;
and 300, adjusting the running frequency of each fan motor one by one in a feedback adjustment mode according to the comparison result of the working condition parameters of each fan until the data collected by the sensor group is consistent with the system value, and realizing the real-time combined adjustment of the multiple fans of the mine.
Further, the parameter acquisition comprises wind speed and wind pressure acquisition.
Further, the control system comprises a PLC, and a signal acquisition and feedback module and an adjusting execution mechanism which are respectively connected to the PLC, wherein the PLC receives the acquired data of the fan acquired by the signal acquisition and feedback module, analyzes and processes the acquired real-time parameters, compares the acquired real-time parameters with the simulation analysis values, and controls the adjusting execution mechanism to adjust the operating parameters of the fan according to the comparison result.
Furthermore, the signal acquisition and feedback module comprises a wind speed sensor, a wind pressure sensor, a given unit, a conditioning circuit and an A/D conversion module;
the wind speed sensor, the wind pressure sensor and the given unit are connected with the conditioning circuit, the conditioning circuit is connected with the A/D conversion module, the A/D conversion module is connected with the PLC, and the acquired signal data are transmitted to the PLC through the conditioning circuit and the A/D conversion module in sequence;
the given unit is used for determining a simulation analysis value according to a simulation result of the mine ventilation three-dimensional simulation system.
Furthermore, the adjusting and executing mechanism comprises a frequency converter connected with the PLC, a frequency conversion/power frequency automatic switching system connected with the frequency converter, and a plurality of motors connected with the frequency conversion/power frequency automatic switching system, wherein the motors independently drive corresponding fans;
and the frequency conversion/power frequency automatic switching system performs selection operation through a manual/automatic selection module and a power frequency/frequency conversion selection module which are connected with the PLC.
Furthermore, the PLC is also connected with an acousto-optic alarm module, an early warning threshold value and a warning threshold value are set in the simulation analysis value, the fluctuation of the early warning threshold value is dynamically adjusted through the difference value of the comparison result, and the early warning threshold value is not more than 90% of the warning threshold value; and the sound and light alarm module carries out three-dimensional warning monitoring on a three-dimensional model set by the mine structure according to the early warning information and the warning information.
Further, the regulation mode of the control system is PID regulation.
Further, the specific adjusting mode of the PID adjustment is as follows:
after the data signals are collected through the sensor group, the analog quantity is converted into the digital quantity through the conditioning circuit and the A/D conversion module;
calculating in a mine ventilation three-dimensional simulation system according to the air volume change of an operation area, setting a simulation analysis value according to a simulation result corresponding to measured data of a simulation sensor group, writing the simulation analysis value into a PLC through a serial port or manually inputting the simulation analysis value into the PLC through a touch screen for comparison, and comparing the result with an error;
and calculating the required control quantity by utilizing proportion, integral and differential, and carrying out frequency conversion and speed regulation on the fan motor by adjusting an execution system until the current state is met.
Further, the method further comprises depth simulation, and the depth simulation method specifically comprises the following steps:
determining a predicted tunneling depth;
determining the ventilation requirements of a mining surface and a working area according to the tunneling depth;
and performing ventilation grid optimization calculation simulation on the predicted tunneling depth through a mine ventilation three-dimensional simulation system, and re-determining a simulation analysis value of the tunneling depth.
Further, the method for three-dimensional alarm monitoring comprises the following steps:
setting two warning nodes, namely an early warning threshold and a warning threshold according to the result of the analog analysis value, and respectively giving different warning information according to the two nodes;
different thresholds are set by combining different mine positions, and the setting of the early warning threshold can dynamically change along with the change of the comparison difference between the analog analysis value and the acquired data;
a three-dimensional model is established for the mine structure in a modeling mode, monitoring information and warning information are projected in the three-dimensional model, and the monitoring information and the warning information are displayed in a three-dimensional mode, so that the purposes of dynamic monitoring and clear progress regulation and control are achieved.
The embodiment of the invention has the following advantages:
the method for adjusting the operation condition can ensure that the multi-fan combined operation condition of different places of the mine adapts to the change of the total ventilation resistance, the production scale and the natural wind pressure of the mine, and meets the requirement of the wind quantity required by the safety production of the mine.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic diagram of a conditioning flow according to an embodiment of the present invention;
fig. 2 is a block diagram of a control system according to an embodiment of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in FIG. 1, the invention provides a method for adjusting the working condition of the multi-fan combined operation of different places of a mine, which comprises the following steps:
step 100, arranging a sensor group for parameter acquisition in a tunnel at an inlet of a fan, and feeding back data acquired in real time to a control system;
200, simulating a corresponding parameter value by utilizing a mine ventilation three-dimensional simulation system to optimize and calculate a ventilation network, and comparing the parameter value serving as a simulation analysis value with data acquired by a tunnel where a fan is located;
and 300, adjusting the running frequency of the fan motor in a feedback adjustment mode according to the comparison result of the working condition parameters of the fans until the data collected by the sensor group is consistent with the system value, so as to realize the real-time adjustment of the mine multi-fan.
It is known from fig. 2 that a plurality of fans (each fan corresponds to a fan motor) can be set simultaneously in this embodiment, and the collection point corresponds to a plurality of entry roadways that need to be monitored and adjusted, that is, the adjustment correspondence of this embodiment is to compare the monitoring results of different fan motors according to different positions with corresponding analog analysis values to perform simultaneous frequency conversion adjustment, thereby realizing the joint adjustment of multiple fans. For example, the frequency of the corresponding No. 1 fan and the No. 2 fan is adjusted according to the detection results of the No. 1 fan and the No. 2 fan, so that the adjusting system is optimized through combined adjustment.
In step 200, the specific principle of the mine ventilation three-dimensional simulation system for simulating parameters such as air volume, air pressure and the like is as follows: under the prior art, the air demand of the underground operation area is provided by fans, wherein the fans n1, n2 and n3 … … are set to be responsible for air supply of an n # operation area, and the selection of the fans is determined according to the air demand of the maximum operation surface for simultaneously operating each area, namely the total power of the fans of the whole system is greater than the power of the maximum air supply. Since the air demand of different n # working planes changes according to the change of the production working plane, namely the air demand (analog analysis value) of the working area is not fixed and changes dynamically, the air demand is determined mainly according to the number of the working planes of the working area.
The air demand can be manually calculated or automatically calculated by the system through the working condition of the working face, when the air demand of a certain working area of the whole mining area changes, the working condition point (including the air quantity and the air pressure of the fan) of the fan for bearing the ventilation of the working area is optimally calculated by triggering the mine ventilation three-dimensional simulation system according to the change result and is provided to the PLC as a simulation analysis value, and the PLC comprehensively considers the adjustment of the fan power according to the feedback adjustment of the data collected by the sensor group, so that the air demand of a plurality of working areas can simultaneously change to achieve the most efficient speed to enable the dynamic change value to be the same as the simulation analysis value or within the acceptable fluctuation range.
As in the present embodiment, the error of the fluctuation may be set to ± 10%, and when the fluctuation is less than 10%, the variable frequency adjustment is not started, otherwise the variable frequency adjustment is started.
The control system comprises a PLC, and a signal acquisition and feedback module and an adjusting execution mechanism which are respectively connected to the PLC, wherein the PLC receives the real-time parameters of the fan acquired by the signal acquisition and feedback module, analyzes and processes the acquired real-time parameters, compares the acquired real-time parameters with the analog analysis values, and controls the adjusting execution mechanism to adjust the operating parameters of the fan according to the comparison result. The PLC receives the wind speed and wind pressure parameters of the fan inlet acquired by the acquisition module, analyzes and processes the wind speed and wind pressure parameters, compares the wind speed and wind pressure parameters with preset wind speed and wind pressure parameters, and controls the execution mechanism to adjust the wind speed and wind pressure parameters.
The signal acquisition and feedback module comprises a wind speed sensor, a wind pressure sensor, a given unit, a conditioning circuit and an A/D conversion module, and the corresponding parameter acquisition comprises the acquisition of wind speed and wind pressure.
The wind speed sensor, the wind pressure sensor and the given unit are connected with the conditioning circuit, the conditioning circuit is connected with the A/D conversion module, the conversion module is connected with the PLC, and the acquired signal data are transmitted to the PLC through the conditioning circuit and the A/D conversion module in sequence;
the given unit is used for determining a simulation analysis value according to a simulation result of the mine ventilation three-dimensional simulation system. It should be noted that the types of sensors involved in the present invention, including but not limited to the above-mentioned measurement of wind speed and wind pressure, and other relevant factors such as natural wind pressure, can also be measured, and are set according to only one of the examples in the present embodiment.
In addition, generally speaking, the output of the sensor group is 4-20mA current or 0-5V voltage, which is a continuous analog quantity, and the current is directly connected to the A/D conversion module of the PLC, then the PLC carries out A/D conversion, if the PLC does not have enough A/D conversion modules, the PLC is firstly externally connected to the A/D conversion module separately, and then a digital signal is sent to the PLC.
The air quantity is equal to the average air speed of the sensor set point roadway section area multiplied by the sensor set point roadway, and the section area is obtained through actual measurement.
Preferably, the adjusting and executing mechanism comprises a frequency converter connected with the PLC, a frequency conversion/power frequency automatic switching system connected with the frequency converter, and a plurality of motors connected with the frequency conversion/power frequency automatic switching system, wherein the motors independently drive corresponding fans;
and the frequency conversion/power frequency automatic switching system performs selection operation through a manual/automatic selection module and a power frequency/frequency conversion selection module which are connected with the PLC.
Preferably, the PLC is further connected to an audible and visual alarm module, which sets an early warning threshold and a warning threshold in the simulation analysis value, and dynamically adjusts an actual value of the early warning threshold according to a difference of the comparison result, wherein the early warning threshold is not greater than 90% of the warning threshold; and the sound and light alarm module carries out three-dimensional warning monitoring on a three-dimensional model set by the mine structure according to the early warning information and the warning information.
Specifically, the three-dimensional warning monitoring method comprises the following steps:
setting two warning nodes, namely an early warning threshold and a warning threshold according to the result of the analog analysis value, and respectively giving different warning information according to the two nodes;
different thresholds are set by combining different mine positions, and the setting of the early warning threshold can dynamically change along with the change of the comparison difference between the analog analysis value and the acquired data;
a three-dimensional model is established for the mine structure in a modeling mode, monitoring information and warning information are projected in the three-dimensional model, and the monitoring information and the warning information are displayed in a three-dimensional mode, so that the purposes of dynamic monitoring and clear progress regulation and control are achieved.
In addition, the invention also comprises an information output display module, and the specific display content comprises measurement signal data and a simulation analysis value given by the simulation of the mine ventilation three-dimensional simulation system and a dynamic adjustment change process, so that the attendant can quickly and accurately grasp the corresponding monitoring information.
In the monitoring process, the system firstly sets two warning nodes which are respectively an early warning threshold and a warning threshold according to the result of the simulation analysis value, and gives warning information of different degrees according to the two nodes respectively, wherein the early warning threshold plays a role in early warning to remind an on-duty worker to manually process the system according to the early warning information, and the warning threshold is that a certain parameter in the system exceeds a rated value, only an accident happens if the parameter is required to be processed in time, and the on-duty worker is required to quickly send out a dangerous case so as to be processed in time by engineering workers.
According to the above, the early warning information can be flexibly determined according to the comparison result of the system, only the early warning function is needed, and the warning information is determined by the system and cannot be adjusted, so that the safety red line of the whole system is formed.
In the system, the comparison result of the simulation analysis value and the actual measurement data is dynamically changed. According to the result of the conventional setting, the fixed and unchangeable threshold value can not achieve the purpose of effective monitoring, and the result of automatic regulation and control of the system can not be reflected from the fixed and unchangeable threshold value, so that different threshold values are set according to different mine positions in the embodiment, and the threshold value setting of each mine position is determined according to the current mine position. Because a monitoring result needs to be obtained in the mine and a system regulation and control structure needs to be embodied on the monitoring result, setting a dynamic threshold (specifically, the dynamic threshold refers to an early warning threshold) which changes along with the change of a system comparison value is most in line with the monitoring requirement of the embodiment.
In the invention, because the supply and demand relations of all positions of the mine are different, and because the influence of factors such as an operation mode and the like causes the demand information of all areas to be different, the comparison information is also dynamically changed. And because the difference of the comparison result is different in different positions of the mine, the time and the condition for reaching the early warning threshold are also different and are influenced by system regulation, so that the early warning threshold is divided according to the comparison result in order to integrate the system regulation information into the early warning threshold, and the setting of the early warning threshold can dynamically change along with the change of the difference. On the other hand, the change of the threshold value changes along with the comparison result, so that the early warning information enables the comparison result to be tracked, the sensitive warning effect is achieved, and the early warning effect is superior to that of the conventional constant value warning.
In addition, in the invention, it is also noted that the structure of the mine can be set up with a three-dimensional model in a modeling manner, and simultaneously, the monitoring information and the prediction information are both projected in the three-dimensional model, and the monitoring information and the warning information are displayed in a three-dimensional manner by the manner, that is, the monitoring information and the warning information of the points are both projected on the corresponding positions of the mine, and meanwhile, different display modes, such as different color transition colors, can be set for distinguishing, and the distinguishing is carried out according to the colors, which is beneficial for the on-duty personnel to quickly and dynamically master the monitoring information of the corresponding positions.
According to the monitoring information, on one hand, the system can automatically adjust the supply and demand relationship to eliminate dangerous situations, and simultaneously plays a role in energy conservation. In another aspect, the mine regulation and control result can be displayed in the eyes of the attendant in a threshold manner, so that the attendant can quickly and accurately grasp the actual monitoring information and the regulation and control result everywhere, the monitoring information and the regulation and control information are not required to be grasped by different systems, and the working intensity of the attendant is reduced.
The regulation mode of the control system is PID regulation. As shown in fig. 2, the PID adjusting process in the present embodiment needs to be further explained:
after a series of necessary parameters such as corresponding wind speed, wind pressure and the like are acquired through the sensor group, analog quantity is converted into digital quantity through A/D conversion, and the method is the first stage of the embodiment;
calculating in a mine ventilation three-dimensional simulation system, simulating measured data corresponding to a sensor group, setting a simulation analysis value according to a simulation result, writing the simulation analysis value into a PLC through a serial port or manually inputting the simulation analysis value into the PLC through a touch screen for comparison, calculating a required control quantity through the arrival error e (t) of the comparison result, and performing frequency conversion and speed regulation on a fan motor through an adjusting execution system until the current state is met. The embodiment of the invention has the following advantages: the method for adjusting the operation condition can ensure that the multi-fan combined operation condition of different places of the mine adapts to the change of the total ventilation resistance, the production scale and the natural wind pressure of the mine, and meets the requirement of the wind quantity required by the safety production of the mine.
The actual ventilation requirements will certainly vary depending on the depth of the mine, the different mining faces and the ventilation of the working area. Therefore, the mine depth is simulated by combining simulation software, for example, mine tunnels are updated according to the deep extension of excavation (for example, the number of extended meters and the number of downward-exploring meters are input in the simulation software in 1 day or 1 month), so that automatic simulation is performed again, and a further simulation function is realized.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. A method for adjusting the working condition of the multi-fan combined operation of different places of a mine is characterized by comprising the following steps:
step 100, arranging a sensor group for parameter acquisition in a tunnel at an inlet of a fan, and feeding back data acquired in real time to a control system;
200, simulating a corresponding parameter value by utilizing a mine ventilation three-dimensional simulation system to optimize and calculate a ventilation network, and comparing the parameter value serving as a simulation analysis value with data acquired by a tunnel where a fan is located;
300, adjusting the operating frequency of each fan motor one by one in a feedback adjustment mode according to the comparison result of the working condition parameters of each fan and the simulation analysis value until the data collected by the sensor group is consistent with the simulation analysis value, so as to realize the real-time combined adjustment of the multiple fans of the mine, and comprehensively considering the adjustment of the fan power according to the feedback adjustment of the data collected by the sensor group, so that the air quantity required by a plurality of working areas can be changed simultaneously to achieve the most efficient speed to ensure that the data collected by the sensor group is the same as the simulation analysis value;
the method further comprises depth simulation, and the depth simulation method specifically comprises the following steps:
determining a predicted tunneling depth, and determining ventilation requirements of a mining face and a working area according to the predicted tunneling depth;
performing ventilation grid optimization calculation simulation on the ventilation condition of the predicted tunneling depth through a mine ventilation three-dimensional simulation system, and re-determining the simulation analysis value of the tunneling depth;
the control system comprises a PLC, and a signal acquisition and feedback module and an adjusting execution mechanism which are respectively connected to the PLC, the PLC is also connected with an acousto-optic alarm module, the acousto-optic alarm module carries out three-dimensional warning monitoring on a three-dimensional model set by a mine structure according to early warning information and warning information, and the three-dimensional warning monitoring method comprises the following steps:
setting two warning nodes, namely an early warning threshold and a warning threshold according to the result of the analog analysis value, and respectively giving different warning information according to the two nodes;
different thresholds are set by combining different mine positions, and the setting of the early warning threshold can dynamically change along with the change of the comparison difference between the analog analysis value and the acquired data;
a three-dimensional model is established for the mine structure in a modeling mode, monitoring information and warning information are projected in the three-dimensional model, and the monitoring information and the warning information are displayed in a three-dimensional mode, so that the purposes of dynamic monitoring and clear progress regulation and control are achieved.
2. The method as claimed in claim 1, wherein the parameter acquisition includes wind speed and wind pressure acquisition.
3. The method for adjusting the working condition of the multi-fan combined operation in different places of the mine as claimed in claim 1, wherein the PLC receives the data acquired by the signal acquisition and feedback module, analyzes and processes the acquired real-time parameters, compares the real-time parameters with the simulated analysis values, and controls the adjustment actuator to adjust the operation parameters of the fan according to the comparison result.
4. The method for adjusting the working condition of the multi-fan combined operation in different places of the mine according to claim 3, wherein the signal acquisition and feedback module comprises a wind speed sensor, a wind pressure sensor, a given unit, a conditioning circuit and an A/D conversion module;
the wind speed sensor, the wind pressure sensor and the given unit are connected with the conditioning circuit, the conditioning circuit is connected with the A/D conversion module, the A/D conversion module is connected with the PLC, and the acquired signal data are transmitted to the PLC through the conditioning circuit and the A/D conversion module in sequence;
and the given unit is used for determining a simulation analysis value according to a simulation result of the mine ventilation three-dimensional simulation system.
5. The method for adjusting the working condition of the multi-fan combined operation at different places in the mine according to claim 3, wherein the adjusting and executing mechanism comprises a frequency converter connected with a PLC (programmable logic controller), a frequency conversion/power frequency automatic switching system connected with the frequency converter, and a plurality of motors connected with the frequency conversion/power frequency automatic switching system, and the motors independently drive the corresponding fans;
and the frequency conversion/power frequency automatic switching system performs selection operation through a manual/automatic selection module and a power frequency/frequency conversion selection module which are connected with the PLC.
6. The method for adjusting the working condition of the multi-fan combined operation in different places of the mine as claimed in claim 5, wherein the early warning threshold value and the warning threshold value are set in the simulation analysis value, and the early warning threshold value is dynamically adjusted by comparing the difference of the results, and is not more than 90% of the warning threshold value.
7. The method for adjusting the working condition of the multi-fan combined operation in different places of the mine as claimed in claim 5, wherein the adjusting mode of the control system is PID adjustment.
8. The method for adjusting the working condition of the multi-fan combined operation in different places of the mine according to claim 7, wherein the specific adjusting mode of the PID adjustment is as follows:
after the data signals are collected through the sensor group, the analog quantity is converted into the digital quantity through the conditioning circuit and the A/D conversion module;
calculating in a mine ventilation three-dimensional simulation system according to the air volume change of an operation area, setting a simulation analysis value according to a simulation result corresponding to measured data of a simulation sensor group, writing the simulation analysis value into a PLC through a serial port or manually inputting the simulation analysis value into the PLC through a touch screen for comparison, and obtaining an error through a comparison result;
and calculating the required control quantity by utilizing proportion, integral and differential, and carrying out variable frequency speed regulation on the fan motor by adjusting an actuating mechanism until the current state is met.
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| CN201910661818.0A CN110259499B (en) | 2019-07-22 | 2019-07-22 | Method for adjusting working condition of multi-fan combined operation in different places of mine |
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| CN112955835A (en) * | 2019-09-27 | 2021-06-11 | 法国圣戈班玻璃厂 | Automated production process and production system for bending glass sheets with integrated digital imaging |
| CN111273055B (en) * | 2020-01-17 | 2022-04-12 | 中国计量大学 | Single-point measurement and control device and method for average wind speed of mine roadway |
| CN111502726B (en) * | 2020-04-22 | 2022-10-14 | 西安科技大学 | Method for establishing wind field regulation and control rules of tunneling face in different ventilation and tunneling modes |
| CN112555184A (en) * | 2020-12-07 | 2021-03-26 | 广州市耀安实业发展有限公司 | Fan pressure detection monitoring method and system, computer equipment and storage medium |
| CN113586155A (en) * | 2021-08-27 | 2021-11-02 | 中钢集团马鞍山矿山研究总院股份有限公司 | Intelligent ventilation regulation and control system and method for metal mine underground operation place |
| CN114109470B (en) * | 2021-11-18 | 2024-04-02 | 中国矿业大学 | Accurate measurement system and method for air quantity of mine tunnel |
| CN114001047B (en) * | 2021-11-30 | 2023-06-16 | 华电电力科学研究院有限公司 | Three-fan control method and device and three-fan system |
| CN114622944B (en) * | 2022-04-19 | 2023-02-24 | 中国矿业大学 | On-demand frequency conversion air adjusting system and method for mine multi-fan combined operation |
| CN116480421B (en) * | 2023-05-05 | 2023-11-14 | 淮南矿业(集团)有限责任公司煤业分公司 | Comprehensive management system for mine ventilator |
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