An emergency power supply device for an explosion-proof local fan

Abstract

The utility model discloses an explosion -proof local fan emergency power supply device, including explosion -proof battery cabinet and inverter cabinet, and explosion -proof battery cabinet is by casing and battery, contactor, buffer resistance and electric reactor constitutes, and inverter cabinet is by casing and inverter core, filter capacitor and output electric reactor constitutes, its characterized in that: explosion -proof battery cabinet and inverter cabinet are split setting, and battery is connected with the input end of inverter core through contactor and electric reactor, and inverter core provides alternating current for the standby fan in the coal mine tunnel through inversion, and charges the battery through rectification. The utility model discloses an explosion -proof local fan emergency power supply device, when the main fan stops for some reason, switches the emergency power supply device to power supply for the standby fan to be the continuous ventilation of the scene, avoids the gas in the local tunnel too high due to the power supply failure under the mine and causes the safety accident. Meanwhile, when the inverter fails, the inverter cabinet can be maintained without ascending the well operation.

Description

Technical Field

[0001] This utility model relates to an emergency power supply device, and more specifically, to an emergency power supply device for an explosion-proof local fan. Background Technology

[0002] In high-gas coal mine production, a large amount of flammable and explosive gas is generated. Localized high gas levels can lead to mine shutdowns and even safety accidents. To prevent the accumulation of gas in localized roadways, local ventilation fans are needed to maintain airflow. However, the mine's power supply circuits frequently experience power outages due to equipment malfunctions. Power supply problems directly prevent the local ventilation fans from operating. Malfunctioning fans cause an increase in gas levels in the coal face and roadways, thus affecting normal and safe production. To maintain uninterrupted power supply to underground equipment such as local ventilation fans, emergency power supplies are required. Therefore, there is an urgent need for explosion-proof emergency power supplies.

[0003] With the continuous advancement of electronic technology, battery technology, explosion-proof technology, and other fields, the development of explosion-proof emergency power supplies has become technically feasible. New explosion-proof materials and structural designs can effectively prevent the propagation of explosion energy. Advanced battery management systems can optimize power supply performance and safety. Intelligent control technology enables functions such as automatic monitoring, rapid switching, and remote monitoring of emergency power supplies, making the development of efficient, reliable, and safe explosion-proof emergency power supplies a reality. This meets the emergency power needs in complex industrial environments and ensures the safe and stable operation of production. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned technical problems, this utility model provides an emergency power supply device for explosion-proof local fans.

[0005] This utility model discloses an explosion-proof emergency power supply device for a local ventilation fan, comprising an explosion-proof battery cabinet and an inverter cabinet. The explosion-proof battery cabinet consists of an explosion-proof battery cabinet shell and a battery, contactor, buffer resistor, and reactor disposed within the internal cavity of the explosion-proof battery cabinet shell. The inverter cabinet consists of an inverter cabinet shell and an inverter core, filter capacitor, and output reactor disposed within the internal cavity of the inverter core. The device is characterized in that the explosion-proof battery cabinet and the inverter cabinet are separate units, with the wiring cavity of the explosion-proof battery cabinet connected to the wiring cavity of the inverter cabinet via mining cables. The battery is connected to the input terminal of the inverter core via the contactor and reactor. The inverter core inverts AC power to provide AC power to a backup fan in the coal mine roadway and charges the battery through rectification.

[0006] The present invention relates to an emergency power supply device for an explosion-proof local fan. The contactor includes contactor KM1 and contactor KM2. The normally open contact of contactor KM2 is connected in series with a buffer resistor and then in parallel with the normally open contact of contactor KM1. The two ends of the connection are then connected between the battery and the reactor.

[0007] The present invention relates to an emergency power supply device for an explosion-proof local fan. The explosion-proof battery cabinet housing is equipped with a three-phase disconnect switch and a voltage detection circuit. The three-phase disconnect switch is located at the output terminal of the reactor, and the voltage detection circuit is used to measure the voltage of the battery.

[0008] The explosion-proof emergency power supply device for a local fan of this utility model has 180 batteries, which are divided into 5 battery modules. Each battery module consists of 36 batteries, and the total capacity of the 180 batteries is 74kWh.

[0009] The beneficial effects of this utility model are as follows: The explosion-proof local fan emergency power supply device of this utility model consists of an explosion-proof battery cabinet and an inverter cabinet. The explosion-proof battery cabinet is equipped with a battery, a reactor, a buffer resistor, and a contactor. The inverter cabinet is equipped with an inverter core, an output reactor, and a filter capacitor. The explosion-proof battery cabinet and the inverter cabinet are connected by mining cables. It serves as the power supply for the standby independent fan in the coal mine and has a frequency conversion start function. When the main fan stops for any reason, it can be switched to the explosion-proof local fan emergency power supply device of this utility model to power the standby fan. It can also achieve frequency conversion soft start, providing continuous ventilation on site and avoiding safety accidents caused by excessive methane levels in local tunnels due to power supply failures.

[0010] Meanwhile, since the explosion-proof battery cabinet and inverter cabinet are set up separately, when the inverter malfunctions, the three-phase isolating switch can be turned off, and the inverter cabinet can be opened in the explosion-proof area for maintenance without having to lift the inverter cabinet equipment up for operation, which improves the convenience and efficiency of inverter cabinet maintenance. Attached Figure Description

[0011] Figure 1 This is a front view of the explosion-proof battery cabinet in this utility model; Figure 2 This is a perspective view of the explosion-proof battery cabinet in this utility model; Figure 3 This is a front view of the inverter cabinet in this utility model; Figure 4 This is a perspective view of the inverter cabinet in this utility model; Figure 5 This is a circuit diagram of the emergency power supply device for the explosion-proof local fan of this utility model.

[0012] In the diagram: 1. Explosion-proof battery cabinet; 2. Inverter cabinet; 3. Explosion-proof battery cabinet housing; 4. Battery; 5. Reactor; 6. Buffer resistor; 7. Contactor; 8. Three-phase disconnect switch; 9. Inverter cabinet housing; 10. Inverter core; 11. Output reactor; 12. Filter capacitor. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] This utility model discloses an explosion-proof emergency power supply device for a local fan, which consists of an explosion-proof battery cabinet 1 and an inverter cabinet 2, and the explosion-proof battery cabinet 1 and inverter cabinet 2 are installed separately. Figure 1 and Figure 2 As shown, the front view and perspective view of the explosion-proof battery cabinet of this utility model are given respectively. The explosion-proof battery cabinet 1 shown consists of an explosion-proof battery cabinet shell 3 and a storage battery 4, a reactor 5, a buffer resistor 6, and a contactor 7 disposed in the internal cavity of the explosion-proof battery cabinet 3. Figure 3 and Figure 4 As shown, the front view and perspective view of the inverter cabinet of this utility model are given respectively. The inverter cabinet 2 shown consists of an inverter cabinet housing 9 and an inverter core 10, an output reactor 11 and a filter capacitor 12 disposed in the internal cavity of the inverter cabinet housing 9.

[0015] like Figure 5 The diagram shows the circuit schematic of the emergency power supply device for the explosion-proof local ventilation fan of this utility model. The battery 4 is connected to the input terminal of the inverter core 10 via contactor 7 and reactor 5 to provide DC power to the input terminal of the inverter core 10. The output terminal of the inverter core 10 is connected to the power input terminal of the standby independent fan via output reactor 11. Reactor 11 acts as a filter, reducing the impact during battery 4 charging. Thus, when the power supply line in the tunnel fails and a power outage occurs, the battery 4 in the explosion-proof battery cabinet 1 provides DC power to the inverter cabinet 2. The inverter core 10 in the inverter cabinet 2 converts the DC power into AC power to supply the standby independent fan, driving the standby independent fan to continue working and providing continuous ventilation to the site, preventing safety accidents caused by excessive methane levels in local tunnels due to power outages.

[0016] The explosion-proof battery cabinet 1 shown also includes a three-phase disconnect switch 8 and a voltage detection circuit. The three-phase disconnect switch 8 is located at the output terminal of the reactor 5 and is used to connect or disconnect the connection between the explosion-proof battery cabinet 1 and the inverter cabinet 2. The voltage detection circuit is used to measure the voltage of the battery 4.

[0017] The contactor 7 shown consists of contactor KM1 and contactor KM2. The normally open contact of contactor KM2 is connected in series with the buffer resistor 6, and then in parallel with the normally open contact of contactor KM1. The two ends of the buffer circuit are then connected between the battery 4 and the reactor 5. In this way, contactor KM1 and buffer resistor 6 form a buffer circuit to achieve power-on buffering. After the power-on buffering is completed, the normally open contact of KM1 is disconnected, and the normally open contact of KM2 is connected.

[0018] As can be seen, since the explosion-proof battery cabinet 1 and inverter cabinet 2 are set up separately and are independent of each other, the wiring cavity of the explosion-proof battery cabinet 1 and the wiring cavity of the inverter cabinet 2 are connected by mining cables. In this way, when the inverter cabinet 2 malfunctions and needs to be repaired, the three-phase disconnecting switch 8 can be turned off to isolate the energized explosion-proof battery cabinet 1 from the inverter cabinet 2, so that the inverter cabinet 2 is de-energized. At this time, the inverter cabinet 2 can be opened for repair without having to bring the inverter cabinet 2 equipment up to the surface, which improves the convenience and efficiency of inverter cabinet repair.

[0019] The number of batteries 4 shown is 180. These 180 batteries 4 are divided into 5 battery modules, each consisting of 36 batteries 4. The total capacity of the 180 batteries 4 is 74kWh. The output voltage of the 180 batteries 4 connected in series is no greater than 600V. The DC power output from the explosion-proof battery cabinet 1, which does not meet the 660V requirement, is used to raise the bus voltage to 930V via inverter core 10. Then, the inverter core 10 inverts the DC power to output an AC voltage that meets the 660V requirement.

[0020] The output reactor 11 and filter capacitor 12 installed in inverter cabinet 2 filter the three-phase output power to improve the quality of the output power.

Claims

1. An emergency power supply device for an explosion-proof local fan, comprising an explosion-proof battery cabinet (1) and an inverter cabinet (2), wherein the explosion-proof battery cabinet consists of an explosion-proof battery cabinet shell (3) and a battery (4), a contactor (7), a buffer resistor (6), and a reactor (5) disposed in the internal cavity of the explosion-proof battery cabinet shell; the inverter cabinet consists of an inverter cabinet shell (9) and an inverter core (10), a filter capacitor (12), and an output reactor (11) disposed in the internal cavity of the inverter cabinet shell; characterized in that: The explosion-proof battery cabinet and the inverter cabinet are set up separately. The wiring cavity of the explosion-proof battery cabinet and the wiring cavity of the inverter cabinet are connected by mining cables. The battery is connected to the input terminal of the inverter core through a contactor and a reactor. The inverter core converts the battery into AC power to provide AC power to the backup fan in the coal mine roadway and charges the battery through rectification.

2. The emergency power supply device for explosion-proof partial fan according to claim 1, characterized in that: The contactor (7) includes contactor KM1 and contactor KM2. The normally open contact of contactor KM2 is connected in series with the buffer resistor (6) and then in parallel with the normally open contact of contactor KM1. The two ends of the connection are connected between the battery (4) and the reactor (5).

3. The emergency power supply device for explosion-proof partial fan according to claim 1 or 2, characterized in that: The explosion-proof battery cabinet housing (3) is equipped with a three-phase disconnect switch (8) and a voltage detection circuit. The three-phase disconnect switch is located at the output end of the reactor (5), and the voltage detection circuit is used to measure the voltage of the battery (4).

4. The explosion-proof emergency power supply device for a local fan according to claim 1 or 2, characterized in that: The number of batteries (4) is 180. The 180 batteries are divided into 5 battery modules. Each battery module consists of 36 batteries. The capacity of the 180 batteries is 74kWh.

Images