Mining uninterruptible power supply intelligent air circulation system

Abstract

The utility model discloses a mining uninterruptible power supply intelligent air circulation system which is composed of a monitoring platform layer, a bus driving control layer and an electrical execution layer, a fan set 1 in the electrical execution layer is powered by a main power source, a fan set 2 is powered by an auxiliary power source, and the auxiliary power source charges a standby power source at the same time; the standby power supply is composed of a transformer, an inverter, a chopper and a storage battery, the standby power supply supplies power to the fan set 3, and the air quality detection system, the battery management system, the early warning control system, the inverter control system and the fan power supply control system in the bus driving control layer communicate with the main controller through a CAN bus. After the main controller comprehensively analyzes air quality data and fan power supply conditions, the switch group is controlled by the fan power supply control system to start and stop three paths of power supplies, so that the system has the functions of monitoring air quality in real time, cooperatively operating multiple paths of fans, uninterruptedly supplying power and early warning abnormity, and personnel in a mine are effectively prevented from suffocation or poisoning casualties.

Description

Technical Field

[0001] The invention relates to a fan control system, and more specifically to an uninterruptible power supply intelligent air circulation system for mines. Background Art

[0002] The working environment in mines is complex. Toxic and harmful gases endanger the lives of workers, flammable and explosive gases accumulate and explode, and dark and damp environments lead to line failures. Accidents often occur. It is particularly important to monitor, warn and handle the concentration, temperature, humidity and pressure of toxic and harmful gases in the air.

[0003] At present, fans are mainly used in mines to achieve underground ventilation and dust removal. Most fans operate independently. However, abnormal power outages are inevitable, which lead to fan shutdown. The temperature in the mine rises and flammable and explosive gases accumulate, posing a fatal risk to mine operations. Summary of the invention

[0004] The purpose of the present invention is to address the problems of air quality and sudden power outages in mines, and to propose an intelligent air circulation system for mines with uninterruptible power supply, which can realize real-time monitoring of air quality, coordinated operation of multiple fans, uninterruptible power supply, and abnormal warning.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A mine-used uninterruptible power supply intelligent air circulation system is composed of a monitoring platform layer, a bus drive control layer, and an electrical execution layer. A fan group 1 in the electrical execution layer is powered by a main power supply, and a fan group 2 is powered by a secondary power supply. The secondary power supply simultaneously charges a backup power supply, and the backup power supply is composed of a transformer, an inverter, a chopper, and a battery. The backup power supply supplies power to the fan group 3. The air quality detection system, the battery management system, the early warning control system, the inverter control system, and the fan power supply control system in the bus drive control layer all communicate with the main controller through a CAN bus. The main controller can remotely control the fan power supply control system through the CAN bus to disconnect or close a switch group, so that the main power supply, the secondary power supply, and the backup power supply stop or start power supply, thereby enabling the three groups of fans to work in coordination and provide uninterrupted power supply.

[0007] The monitoring platform layer is located in the ground monitoring room of the mine, and communicates with the main controller in the bus drive layer using Ethernet; the bus drive layer is located in the mine, and all modules are installed in a flameproof box and connected through a CAN bus; the electrical execution layer is located in the mine, and the battery, chopper, inverter and transformer are all installed in the flameproof box, and the multi-point sensor and early warning circuit module are installed in a distributed manner.

[0008] The main controller can communicate with the inverter control system via the CAN bus to remotely control the start and stop of the inverter, thereby controlling the charging and discharging of the battery.

[0009] The advantages of the uninterruptible power supply intelligent air circulation system for mines described in the present invention are:

[0010] The system has three groups of fans and two independent input power supplies, the main power supply and the auxiliary power supply. The auxiliary power supply also charges the backup power supply, which serves as the third power supply to supply power to fan group 3. The system can start and stop the three power supplies independently, so that the three groups of fans can work in coordination.

[0011] The system monitors the concentration of toxic and harmful gases (including methane, carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrogen dioxide, and ammonia) at multiple points in the mine in real time, and controls the disconnection and closing of the main power supply, auxiliary power supply, and backup power supply according to the monitored air quality data, thereby achieving high-efficiency coordinated operation of three groups of fans and improving the air circulation efficiency in the mine.

[0012] The system monitors the battery power through the battery management system and charges and discharges the battery through the inverter control system, so that the backup power supply can be put into use at any time. In the case of abnormal power supply of both the remote main power supply and the auxiliary power supply, the local backup power supply (the battery is placed in the mine) is automatically started and an early warning is issued to notify personnel to evacuate, so as to achieve uninterrupted power supply for the fan, effectively preventing casualties caused by suffocation or poisoning due to sudden power outages and poor air circulation underground.

[0013] The on-duty personnel manually started the backup power supply in the mine's ground monitoring room to further ensure the personal safety of the workers.

[0014] The monitoring platform layer is located in the ground monitoring room of the mine. It can remotely monitor the real-time air quality data in the mine and retrieve and analyze historical data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a structural block diagram of an uninterruptible power supply intelligent air circulation system for mines.

[0016] Figure 2 It is a flow chart of air quality monitoring and fan coordinated operation provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] like Figure 1 As shown, the fan unit 1 in the electrical execution layer is powered by the main power supply, and the fan unit 2 is powered by the auxiliary power supply. The auxiliary power supply also charges the backup power supply. The backup power supply consists of a transformer, an inverter, a chopper and a battery. The battery management system monitors the battery power. The inverter control system charges and discharges the battery by controlling the inverter. The backup power supply serves as the third power supply to power the fan unit 3.

[0018] The bus drive control layer is composed of the main controller that obtains the real-time data of the air quality detection system, the fan power supply control system and the battery management system through the CAN bus. After a comprehensive analysis of the air quality data and the fan power supply situation, the fan power supply control system is remotely controlled through the CAN bus to disconnect or close the switch group, so that the main power supply, auxiliary power supply and backup power supply are started or stopped, thereby enabling the three groups of fans to work together and provide uninterrupted power supply.

[0019] The monitoring platform layer is located in the ground monitoring room of the mine. It is a control software running on a computer and communicates with the main controller located in the mine through Ethernet. The main controller collects real-time data from the distributed installed sensor group of the air quality detection system, battery power data from the battery management system, inverter operation data from the inverter control system, and power supply data from the fan power supply control system, and transmits it to the monitoring platform layer through Ethernet. The staff in the ground monitoring room of the mine can monitor in real time. At the same time, the system regularly saves the operation data and stores it in the data management system.

[0020] When the main controller determines that an abnormal situation occurs, on the one hand, it activates the emergency warning control system in the monitoring platform layer to inform the on-duty personnel, and on the other hand, it activates the warning control system to make the distributed installed warning circuit module send out sound and light alarms to help mine workers evacuate in time.

[0021] like Figure 2 As shown, it is a flow chart of air quality monitoring and fan coordinated operation provided by an embodiment of the present invention. When the mine uninterruptible power supply intelligent air circulation system is working, the fan power supply control system first detects the power supply. When the main power supply is abnormal, the auxiliary power supply is started. When the main power supply and the auxiliary power supply are abnormal, the backup power supply is started. When the backup power supply is abnormal, the early warning system is started. When the main power supply, the auxiliary power supply, and the backup power supply are all powered normally, the fan group 1 is started, and the air quality index AQI measured by the air quality detection system is read. The system sets 3 thresholds. When the AQI is less than the first threshold and reaches T1 time, the fan group 1 and the fan group 2 are started. When the AQI is greater than the first threshold and less than the second threshold, and the duration exceeds T2, the fan group 1, the fan group 2, and the fan group 3 are started. When the AQI is greater than the second threshold and less than the third threshold, and the duration exceeds T3, the early warning system is started to notify the operating personnel to evacuate.

[0022] The following is an explanation of the calculation method of the air quality index AQI and the three thresholds of AQI:

[0023] The measured air quality parameters (methane concentration, carbon monoxide concentration, hydrogen sulfide concentration, sulfur dioxide concentration, nitrogen dioxide concentration, ammonia concentration, temperature, humidity, pressure) are set as a1, a2, a3…an, and defined as:

[0024] AQI is a one-dimensional array [a1, a2, a3…an], the maximum allowable air quality parameter is AMAX=[M1, M2, M3…Mn], and the three threshold coefficients are α, β, and γ, respectively, defined as:

[0025] The first threshold X1 = α × [M1, M2, M3…Mn] = [αM1, αM2, αM3…αMn];

[0026] The second threshold X2 = β × [M1, M2, M3…Mn] = [βM1, βM2, βM3…βMn],

[0027] The third threshold value X3 = γ × [M1, M2, M3…Mn] = [γM1, γM2, γM3…γMn],

[0028] When any element in AQI is greater than any element in the first threshold X1, it is considered that AQI>the first threshold X1. Based on this, the size of AQI and the first threshold X1, the second threshold X2, and the third threshold X3 can be determined to determine the program execution range.

Claims

1. A mine-used uninterruptible power supply intelligent air circulation system, characterized in that: It consists of a monitoring platform layer, a bus drive control layer, and an electrical execution layer. The fan group in the electrical execution layer is powered by a main power supply, and the fan group is powered by an auxiliary power supply. The auxiliary power supply also charges the backup power supply. The backup power supply is composed of a transformer, an inverter, a chopper, and a battery. The backup power supply supplies power to the fan group. The air quality detection system, battery management system, early warning control system, inverter control system, and fan power supply control system in the bus drive control layer all communicate with the main controller through the CAN bus. The main controller can remotely control the fan power supply control system through the CAN bus to disconnect or close the switch group, so that the main power supply, auxiliary power supply, and backup power supply stop or start power supply, thereby enabling the fan group to work collaboratively and with uninterrupted power supply.

2. The uninterruptible power supply intelligent air circulation system for mines according to claim 1 is characterized in that The monitoring platform layer is located in the ground monitoring room of the mine, and communicates with the main controller in the bus drive layer via Ethernet; the bus drive layer is located in the mine, and all modules are installed in a flameproof cabinet and connected via the CAN bus; the electrical execution layer is located in the mine, and the battery, chopper, inverter and transformer are all installed in the flameproof cabinet, and the multi-point sensors and early warning circuit modules are installed in a distributed manner.

3. The uninterruptible power supply intelligent air circulation system for mines according to claim 1 is characterized in that The main controller can communicate with the inverter control system through the CAN bus to remotely control the start and stop of the inverter, thereby controlling the charging and discharging of the battery.

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