A mining explosion-proof and intrinsically safe DC regulated power supply

Abstract

This utility model discloses a mine-use explosion-proof and intrinsically safe DC regulated power supply, including: an explosion-proof power supply box and an AC-DC module, a three-channel DC power supply module, a dual power supply switching module, a dual overvoltage and overcurrent protection module, a control and monitoring module, and a backup battery installed inside it. The AC-DC module is connected to the input terminal of the main power supply. The dual power supply switching module is used for switching between the main power supply and the backup battery. The control and monitoring module monitors the voltage and current output of each DC power supply module, the main power supply, and the backup battery. When the voltage or current output of a certain DC power supply module exceeds a threshold, the corresponding dual overvoltage and overcurrent protection module is triggered to activate the protection action. This mine-use explosion-proof and intrinsically safe DC regulated power supply has multiple protection mechanisms at the output terminal to cope with transient interference or load changes, ensuring stable power output while preventing safety accidents. When the main power supply is depleted, it can automatically switch to the backup battery to continue supplying power to the load, allowing the load to operate normally.

Description

Technical Field

[0001] This utility model relates to the field of mining power supply technology, specifically to a mining explosion-proof and intrinsically safe DC regulated power supply. Background Technology

[0002] Explosion-proof and intrinsically safe DC power supplies for mining are mainly used in flammable and explosive environments such as coal mines and metal mines, providing safe and reliable DC power for underground equipment (such as monitoring systems, communication equipment, sensors, lighting systems, etc.). Their core function is to ensure stable power output while meeting both explosion-proof and intrinsically safe standards, preventing gas and coal dust explosions caused by electrical sparks or high temperatures. A search revealed Chinese patent application number "CN201220744613.2", which discloses a mining safety production equipment, specifically a mining explosion-proof and intrinsically safe DC power supply. This power supply includes an explosion-proof power box and, within the box, sequentially connected AC power input terminals, a power fuse, a power transformer, three AC / DC power modules, and three intrinsically safe output terminals. Each AC / DC power module and each intrinsically safe output terminal is equipped with dual current-limiting protection circuits, dual overvoltage protection circuits, and electronic switches.

[0003] In the process of implementing this utility model, the inventors discovered the following problems with the existing technology:

[0004] Existing mining DC power supplies rely on a single power source to power all loads. When the power supply fails or is unavailable due to other factors, it cannot provide a reliable and uninterrupted DC voltage regulation, causing the loads to malfunction and reducing work efficiency.

[0005] Therefore, the problem that this utility model urgently needs to solve is to provide a mining explosion-proof and intrinsically safe DC regulated power supply that has multiple protection mechanisms at the output end of the power supply during use to deal with transient interference or load changes, to ensure stable power output while preventing safety accidents, and to automatically switch to the backup battery to continue to power the load when the main power supply is out of power, so as to avoid affecting the normal use of the load. Utility Model Content

[0006] To address the aforementioned technical problems, the purpose of this utility model is to overcome the shortcomings of existing technologies that rely solely on a single power supply to power various loads. When the power supply fails or is unavailable due to other factors, it cannot reliably and continuously provide a DC regulated power supply, leading to the load's inability to operate normally and reduced efficiency. This invention provides a mining-grade explosion-proof and intrinsically safe DC regulated power supply that incorporates multiple protection mechanisms at the power output to cope with transient interference or load fluctuations. This ensures stable power output while preventing safety accidents. Furthermore, when the main power supply fails, it automatically switches to a backup battery to continue powering the load, preventing disruption to normal load operation.

[0007] To achieve the above objectives, this utility model provides a mine-use explosion-proof and intrinsically safe DC regulated power supply, comprising: an explosion-proof power supply box and an AC-DC module, a three-way DC power supply module, a dual power supply switching module, a dual overvoltage and overcurrent protection module, a control and monitoring module, and a backup battery, all housed within the box and integrated on a single circuit board.

[0008] The AC-DC module connected to the input terminal of the main power supply is used to convert the AC power with a voltage input range of 85-305VAC of the main power supply into 24V DC power, and to output power to all loads.

[0009] The three-channel DC power supply module electrically connected to the AC-DC module includes: two sets of DC-DC modules with a power of 24W and an output voltage of 24V, and one set of DC-DC modules with a power of 24W and an output voltage of 18V; used to convert the DC power of the main power supply with a power of 90W and an output voltage of 24V into three mutually isolated DC power supplies, which are then connected to the load to supply power to the load. Each of the DC power supply modules and the load is equipped with a dual overvoltage and overcurrent protection module.

[0010] The dual power supply switching module is used to switch between the main power supply and the backup battery. When the main power supply is out of power, the backup battery is connected to ensure that the load can be used normally.

[0011] The control and monitoring module is used to monitor the voltage and current output of each DC power module, main power supply and backup battery. When the voltage or current output of a certain DC power module exceeds the threshold, the corresponding dual overvoltage and overcurrent protection module is triggered to activate the protection action to protect the load.

[0012] Preferably, the mining explosion-proof and intrinsically safe DC regulated power supply further includes: an EMC filter membrane module integrated on the circuit board and connected between the main power supply and the AC-DC module, used to suppress and eliminate strong electromagnetic interference and electrical spark interference from the outside.

[0013] Preferably, the backup battery is a lithium battery pack, and the lithium battery pack is composed of six batteries connected in series with lithium iron phosphate cells.

[0014] Preferably, the mining explosion-proof and intrinsically safe DC regulated power supply further includes: a charging module; wherein,

[0015] The charging module includes an SLM6900B charging chip for charging the backup battery. During the charging process, the chip can collect the voltage and current signals of the backup battery and transmit the collected voltage and current signals to the control and monitoring module, which then processes and monitors the voltage and current signals of the backup battery.

[0016] Preferably, the control and monitoring module includes: a monitoring chip of model STM32F103C8T6; wherein,

[0017] The monitoring chip is used to collect voltage and current signals from each DC power module, backup battery, and main power supply, and to calculate their respective power based on their current and voltage signals.

[0018] Preferably, the intrinsically safe and explosion-proof DC regulated power supply for mining further includes: a temperature acquisition module and a display module; wherein,

[0019] The temperature acquisition module is used to acquire the temperature of the backup battery and the load, and transmit the acquired temperature signals to the control and monitoring module respectively. The control and monitoring module receives and processes the acquired temperature signals. When the temperature of the backup battery or the temperature of the load exceeds the threshold, the control and monitoring module interrupts the charging of the backup battery or stops supplying power to the load.

[0020] The display module is mounted on the explosion-proof power supply box and is used to display the voltage and current information of each DC power module, backup battery and main power supply, as well as the temperature of the backup battery and the temperature of the load.

[0021] Preferably, the control and monitoring module is connected to the host computer via an RS485 communication module.

[0022] Preferably, the explosion-proof power supply box includes: an independent upper compartment and a lower compartment, with an upper cover and a lower cover respectively detachably provided at their openings. The upper compartment is equipped with a circuit board integrating an AC-DC module, a three-way DC power supply module, a backup battery, a dual power switching module, a dual overvoltage and overcurrent protection module, and a control and monitoring module. The lower compartment is fixedly equipped with a backup battery. Located next to the backup battery, the lower compartment is fixedly equipped with a JD4 explosion-proof wall-penetrating terminal that connects the components in the upper and lower compartments. A battery control switch is installed at the bottom of the lower compartment and is connected to the JD4 explosion-proof wall-penetrating terminal. The backup battery is electrically connected to the circuit board through the JD4 explosion-proof wall-penetrating terminal. Explosion-proof cable entry terminals are welded to both sides of the explosion-proof power supply box. The main power supply or load is electrically connected to the circuit board through the explosion-proof cable entry terminals. The display module is fixed above the circuit board.

[0023] Preferably, an observation window is provided on the upper cover facing the display module, and a transparent explosion-proof glass is fixedly installed on the observation window.

[0024] Preferably, the outer walls of the upper cover and the lower cover are respectively hinged with handles.

[0025] According to the above technical solution, the beneficial effects of the explosion-proof and intrinsically safe DC regulated power supply for mining provided by this utility model in use are as follows:

[0026] (1) This utility model converts low-voltage DC power through a set of AC-DC modules for rectification and filtering. The DC power is then converted into three mutually isolated DC power through three sets of DC-DC modules for use by the load. Multiple protection mechanisms are set at the output of the power supply to deal with transient interference or load changes. While ensuring stable power output, it prevents safety accidents and improves the safety and reliability of the power supply. In addition, when the main power supply is out of power, it can automatically switch to the backup battery to continue to supply power to the load, avoiding affecting the normal use of the load.

[0027] (2) It is equipped with a control and monitoring module, which can collect voltage and current signals of each circuit in real time to monitor the status of the power supply and load, strengthen the monitoring of the underground situation, and prevent safety problems.

[0028] (3) This utility model integrates an AC-DC module, a three-way DC power supply module, a dual power supply switching module, a dual overvoltage and overcurrent protection module, a control and monitoring module and an EMC filter module on a single circuit board. This allows for the use of a high-efficiency integrated module, which optimizes heat dissipation and the burden on the power grid, while also reducing the size and facilitating installation and maintenance.

[0029] In summary, this utility model sets up multiple protection mechanisms at the output end of the power supply to cope with transient interference or load changes, ensuring stable power output while preventing safety accidents. When the main power supply fails, it can automatically switch to the backup battery to continue supplying power to the load, avoiding affecting the normal use of the load.

[0030] Other features and advantages of this utility model will be described in detail in the following detailed description section; and all parts not covered in this utility model are the same as or can be implemented using existing technology. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of the working principle of a mining explosion-proof and intrinsically safe DC regulated power supply provided in a preferred embodiment of this utility model;

[0033] Figure 2 This is a circuit diagram of a dual overvoltage and overcurrent protection module for a mine explosion-proof and intrinsically safe DC regulated power supply provided in a preferred embodiment of this utility model.

[0034] Figure 3 This is a circuit diagram of a dual power supply switching module for a mine explosion-proof and intrinsically safe DC regulated power supply provided in a preferred embodiment of this utility model.

[0035] Figure 4 This is a circuit diagram of a three-channel DC power supply module for a mine explosion-proof and intrinsically safe DC regulated power supply provided in a preferred embodiment of this utility model.

[0036] Figure 5 This is a schematic diagram of the monitoring chip of the control and monitoring module of the intrinsically safe and explosion-proof DC regulated power supply for mining provided in a preferred embodiment of this utility model;

[0037] Figure 6 This is a schematic diagram of the structure of the explosion-proof power supply box of the intrinsically safe and explosion-proof DC regulated power supply for mining provided in a preferred embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the internal structure of the explosion-proof power supply box of the intrinsically safe and explosion-proof DC regulated power supply for mining, provided in a preferred embodiment of the present invention.

[0039] Figure 8 This is a structural cross-sectional view of the explosion-proof power supply box of a mining explosion-proof and intrinsically safe DC voltage regulator provided in a preferred embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures

[0041] 100. AC-DC module; 200. DC power supply module; 300. Backup battery; 400. Dual power switching module; 500. Dual overvoltage and overcurrent protection module; 600. Control and monitoring module; 700. EMC filter membrane module; 800. Charging module; 900. Temperature acquisition module; 1000. Display module; 1. Explosion-proof power supply box; 2. Circuit board; 3. Upper cover; 4. Lower cover; 5. JD4 explosion-proof through-wall terminal; 6. Battery control switch; 7. Explosion-proof cable entry terminal; 8. Observation window; 9. Explosion-proof glass; 10. Handle; 11. Battery box. Detailed Implementation

[0042] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0043] like Figure 1-8As shown, the present invention provides a mine explosion-proof and intrinsically safe DC regulated power supply, including: an explosion-proof power supply box 1 and an AC-DC module 100, a three-way DC power supply module 200, a dual power supply switching module 400, a dual overvoltage and overcurrent protection module 500, a control and monitoring module 600 and a backup battery 300, which are installed inside the box and integrated on a circuit board 2.

[0044] The AC-DC module 100 connected to the input terminal of the main power supply is used to convert the AC power with a voltage input range of 85-305VAC of the main power supply into 24V DC power, and to output power to all loads.

[0045] The three-way DC power supply module 200 electrically connected to the AC-DC module 100 includes: two sets of DC-DC modules with a power of 24W and an output voltage of 24V, and a set of DC-DC modules with a power of 24W and an output voltage of 18V; used to convert the DC power of the main power supply with a power of 90W and an output voltage of 24V into three mutually isolated DC power supplies and connect them to the load respectively to supply power to the load, and each of the DC power supply modules 200 and the load is provided with a dual overvoltage and overcurrent protection module 500;

[0046] The dual power supply switching module 400 is used to switch between the main power supply and the backup battery 300. When the main power supply is out of power, the backup battery 300 is connected to ensure that the load can be used normally.

[0047] The control and monitoring module 600 is used to monitor the voltage and current output of each DC power module 200, main power supply and backup battery 300. When the voltage or current output of a certain DC power module 200 exceeds the threshold, the corresponding dual overvoltage and overcurrent protection module 500 is triggered to activate the protection action to protect the load.

[0048] In the above scheme, the main power supply is underground AC power, which supplies power to all loads. Before supplying power to all loads, the AC power is first converted into DC power by the AC-DC module 100. After being converted into DC power, the AC power from the main power supply is further converted into three separate DC power lines by the three-way DC power supply module 200, and then the loads are protected by the dual overvoltage and overcurrent protection module 500.

[0049] When the main power supply fails due to a fault or other factors, the monitoring module 600 can switch to the backup battery 300 via the dual power switching module 400, so that the backup battery 300 can continuously supply power to all loads, ensuring seamless connection of the backup battery 300 without affecting the normal use of the loads. The dual power switching module 400 includes: a dual power switching circuit and a switching switch, such as... Figure 3As shown, the working principle of the dual power supply switching module 400 is as follows: Q1 and Q2 are the switching switches for the main power supply and the backup battery 300, respectively. The remaining components are auxiliary switches that automatically switch between each other. The conduction condition for Q1 and Q2 is that VGS is less than zero, and the conduction condition for Q3 is that VGS is greater than zero.

[0050] When both the main power supply VCC and the backup battery VBB are normal, the state of switch Q2 is as follows: the voltage at point G2 is determined by the voltage division of VCC through R1 and R2. Adjusting the resistance values ​​of R1 and R2 makes the voltage at point G2 greater than that at point S2. At this time, VGS of Q2 is greater than zero, and Q2 is cut off. VBB does not supply power regardless of whether it has power or not.

[0051] Switch Q1 state: The voltage at point S1 is equal to VCC. The voltage at point G3 is determined by the voltage division of VCC through R3 and R4. The appropriate resistance value can be adjusted to make VGS of Q3 greater than zero. At this time, Q3 is turned on, causing G1 of Q1 to be directly connected to ground through Q3, which is 0V. Therefore, VGS of Q1 is 0-VCC, which meets the conduction condition of being less than zero. At this time, Q1 is turned on, and VCC is output normally.

[0052] When the main power supply VCC fails and the backup battery VBB is normal, the state of switch Q2 is: VCC returns to zero, point G2 is zero, and VGS of Q2 is 0-VBB, which meets the conduction condition and conducts normally.

[0053] Switch Q1 state: VCC is zero, G3 is zero, Q3's VGS=0 does not meet the conduction condition, Q3 is cut off. The voltage at G1 is conducted by R5, so its value is VBB, making Q1's VGS=VBB greater than zero, which does not meet the conduction condition, so Q1 is cut off.

[0054] In addition, the function of diodes D4, D3, D2, and D1 is that, since there is a body diode inside the MOSFET, when Vout is energized, the voltage will flow back to the source terminal of the MOSFET, causing the gate terminals of the three MOSFETs to have voltage. At this time, automatic switching cannot be completed, and the circuit voltage is chaotic. The four diodes are the reverse voltage of the resistance.

[0055] In the above solution, the dual overvoltage and overcurrent protection module 500 includes: two independent overvoltage and overcurrent circuits and MOSFETs, such as... Figure 2 As shown, a fault in any one of the overvoltage and overcurrent circuits will not affect the operation of the other circuit. The working principle of each overvoltage and overcurrent circuit is as follows: the monitoring module 600 is responsible for responding to the MOSFET switch. When the output voltage of any DC power module 200 exceeds the threshold, the monitoring module 600 turns off the MOSFET and stops supplying power to the load; when the output current of any DC power module 200 exceeds the threshold, the monitoring module 600 turns off the MOSFET and stops supplying power to the load.

[0056] In addition, each of the dual overvoltage and overcurrent protection modules 500 is soldered to the circuit board 2 through two sets of 5P pins, and the three DC-DC modules use isolation transformers and optocouplers to achieve isolation between the input and output terminals, transforming the 24V output voltage from the 90W main power supply into three mutually isolated outputs to power the load respectively.

[0057] In summary, this utility model uses a set of AC-DC modules 100 to rectify and filter low-voltage DC power. The DC power is then converted into three isolated DC power supplies by three sets of DC-DC modules for the load. Multiple protection mechanisms are set at the output of the power supply to deal with transient interference or load changes. While ensuring stable power output, it prevents safety accidents and improves the safety and reliability of the power supply. In addition, when the main power supply fails, it can automatically switch to the backup battery to continue to power the load, avoiding affecting the normal use of the load.

[0058] In a preferred embodiment of this utility model, the mining explosion-proof and intrinsically safe DC regulated power supply further includes: an EMC filter membrane module 700 integrated on the circuit board 2 and connected between the main power supply and the AC-DC module 100, for suppressing and eliminating strong electromagnetic interference and electric spark interference from the outside.

[0059] In the above scheme, the main power supply is rectified and filtered to convert into low-voltage DC power through the combined use of the AC-DC module 100 and the EMC filter module 700.

[0060] In a preferred embodiment of this utility model, the backup battery 300 is a lithium battery pack, and the lithium battery pack is composed of six batteries connected in series with lithium iron phosphate cells.

[0061] In a preferred embodiment of this utility model, the mine-use explosion-proof and intrinsically safe DC regulated power supply further includes: a charging module 800; wherein,

[0062] The charging module 800 includes a charging chip of model SLM6900B, which is used to charge the backup battery 300. During the charging process, the chip can collect the voltage and current signals of the backup battery 300 and transmit the collected voltage and current signals to the control and monitoring module 600, which processes and monitors the voltage and current signals of the backup battery 300.

[0063] In the above scheme, the charging module 800 is soldered to the circuit board 2 through two sets of 5P pins.

[0064] In a preferred embodiment of this utility model, the control and monitoring module 600 includes: a monitoring chip of model STM32F103C8T6; wherein,

[0065] The monitoring chip is used to collect the voltage and current signals of each DC power module 200, backup battery 300, and main power supply, and to calculate their respective power based on their respective current and voltage signals.

[0066] In the above scheme, such as Figure 5 The diagram shows the structure of the monitoring chip. The monitoring chip, model STM32F103C8T6, can monitor various voltage and current signals in real time, thereby enabling the monitoring of the status of components and loads and strengthening the control and supervision of the mine conditions.

[0067] In a preferred embodiment of this utility model, the mine-use explosion-proof and intrinsically safe DC regulated power supply further includes: a temperature acquisition module 900 and a display module 1000; wherein,

[0068] The temperature acquisition module 900 is used to acquire the temperature of the backup battery 300 and the load, and transmit the acquired temperature signals to the control and monitoring module 600 respectively. The control and monitoring module 600 receives and processes the acquired temperature signals. When the temperature of the backup battery 300 or the temperature of the load exceeds the threshold, the control and monitoring module 600 interrupts the charging of the backup battery 300 or stops supplying power to the load.

[0069] The display module 1000 is mounted on the explosion-proof power supply box 1 and is used to display the voltage and current information of each DC power supply module 200, backup battery 300 and main power supply, as well as the temperature of backup battery 300 and load.

[0070] In the above scheme, the temperature acquisition module 900 includes: a temperature sensor mounted on the backup battery 300 and each load for real-time acquisition of the temperature of the backup battery 300 and each load; the display module 1000 includes: a screen and a driving circuit; and the screen is connected to the circuit board 2 via a ribbon cable.

[0071] In a preferred embodiment of this utility model, the control and monitoring module 600 is connected to the host computer via an RS485 communication module.

[0072] In the above scheme, the control and monitoring module 600 can monitor various states of the power supply in real time to prevent safety problems, and transmit the monitored data to the host computer through the RS485 communication module for backend personnel to supervise.

[0073] In a preferred embodiment of this utility model, the explosion-proof power supply box 1 includes: an independent upper compartment and a lower compartment, with an upper cover 3 and a lower cover 4 respectively detachably provided at their openings. The upper compartment is equipped with a circuit board 2 integrating an AC-DC module 100, a three-way DC power supply module 200, a backup battery 300, a dual power switching module 400, a dual overvoltage and overcurrent protection module 500, and a control and monitoring module 600. The lower compartment is fixedly equipped with the backup battery 300, and the lower compartment is located next to the backup battery 300. The interior is equipped with JD4 explosion-proof wall-penetrating terminals 5, which connect the components in the upper and lower compartments. A battery control switch 6 is installed at the bottom of the lower compartment and is connected to the JD4 explosion-proof wall-penetrating terminals 5. The spare battery 300 is electrically connected to the circuit board 2 through the JD4 explosion-proof wall-penetrating terminals 5. Explosion-proof cable entry terminals 7 are welded to both sides of the explosion-proof power supply box 1. The main power supply or load is electrically connected to the circuit board 2 through the explosion-proof cable entry terminals 7. The display module 1000 is fixed on top of the circuit board 2.

[0074] In the above scheme, the explosion-proof power supply box 1 is made of Q235 carbon steel, and its surface can be painted with a paint thickness of less than or equal to 1.0 mm. During installation, the electrical clearance is greater than or equal to 3.2 mm, the creepage distance is greater than or equal to 3.2 mm, the joint surface width is ≥25 mm, the joint surface gap is ≤0.5 mm, the distance from the edge of the hole on the joint surface to the interior is ≥9 mm, the roughness of the explosion-proof static joint surface is ≤Ra6.3, and the roughness of the dynamic joint surface is ≤Ra3.2.

[0075] A battery box is fixedly installed in the lower compartment, and a spare battery 300 is fixedly installed inside the battery box. The opening of the battery box 11 is sealed by the battery box cover.

[0076] In use, turn off the battery control switch 6 on the explosion-proof power supply box 1, connect the cables while the power is off, close the upper cover 3 and lower cover 4, and then turn on the power. After power is on, each module will operate automatically. The control and monitoring module 600 collects the current and voltage of each channel at preset time intervals. It refreshes the voltage, current, and temperature information displayed by the display module 1000 at a preset frequency, waits for the signal from the host computer via the 485 bus, and replies with information in the correct format after receiving it. The dual overcurrent and overvoltage protection module 500 monitors whether the output voltage and current exceed the limits. If the limits are exceeded, it automatically disconnects and stops supplying power to the load.

[0077] In a preferred embodiment of this utility model, an observation window 8 is provided on the upper cover 3 facing the display module 1000, and a transparent explosion-proof glass 9 is fixedly provided on the observation window 8.

[0078] In the above scheme, the information displayed on the display module 1000 can be seen through the explosion-proof glass on the observation window.

[0079] In a preferred embodiment of this utility model, the outer walls of the upper cover 3 and the lower cover 4 are respectively hinged with handles 10.

[0080] In summary, the explosion-proof and intrinsically safe DC regulated power supply for mining provided by this utility model overcomes the problem in the prior art that only one power supply is used to supply power to each load. When the power supply fails or is unable to supply power due to other factors, it cannot provide a reliable and uninterrupted DC regulated power supply, which leads to the load not being able to work continuously and reduces work efficiency.

[0081] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0082] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0083] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A mine-use explosion-proof and intrinsically safe DC regulated power supply, characterized in that, include: The explosion-proof power supply box (1) and the AC-DC module (100), the three-way DC power supply module (200), the dual power supply switching module (400), the dual overvoltage and overcurrent protection module (500), the control and monitoring module (600) and the backup battery (300) are installed inside it and integrated on a circuit board (2). The AC-DC module (100) connected to the input terminal of the main power supply is used to convert the AC power with a voltage input range of 85-305VAC of the main power supply into 24V DC power, and to output power to all loads. The three-way DC power supply module (200) electrically connected to the AC-DC module (100) includes: two sets of DC-DC modules with a power of 24W and an output voltage of 24V, and one set of DC-DC modules with a power of 24W and an output voltage of 18V; The DC power supply with a power of 90W and an output voltage of 24V is used to convert the DC power of the main power supply into three isolated DC power supplies and connect them to the load respectively to supply power to the load. Each DC power supply module (200) and the load are equipped with a dual overvoltage and overcurrent protection module (500). The dual power supply switching module (400) is used to switch between the main power supply and the backup battery (300). When the main power supply is out of power, the backup battery (300) is connected to ensure that the load can be used normally. The control and monitoring module (600) is used to monitor the voltage and current output of each DC power module (200), main power supply and backup battery (300), and when the voltage or current output of a certain DC power module (200) exceeds the threshold, the corresponding dual overvoltage and overcurrent protection module (500) is triggered to start the protection action to protect the load.

2. The intrinsically safe and explosion-proof DC regulated power supply for mining as described in claim 1, characterized in that, The mining explosion-proof and intrinsically safe DC regulated power supply also includes an EMC filter membrane module (700) integrated on the circuit board (2) and connected between the main power supply and the AC-DC module (100), used to suppress and eliminate strong electromagnetic interference and electric spark interference from the outside.

3. The intrinsically safe and explosion-proof DC regulated power supply for mining as described in claim 1, characterized in that, The backup battery (300) is a lithium battery pack, which is composed of six batteries connected in series with lithium iron phosphate cells.

4. The intrinsically safe and explosion-proof DC regulated power supply for mining according to claim 3, characterized in that, The intrinsically safe and explosion-proof DC regulated power supply for mining also includes: a charging module (800); wherein... The charging module (800) includes a charging chip of model SLM6900B, which is used to charge the backup battery (300). During the charging process, the chip can collect the voltage and current signals of the backup battery (300) and transmit the collected voltage and current signals to the control and monitoring module (600). The control and monitoring module (600) processes and monitors the voltage and current signals of the backup battery (300).

5. The intrinsically safe and explosion-proof DC regulated power supply for mining according to claim 4, characterized in that, The control and monitoring module (600) includes: a monitoring chip of model STM32F103C8T6; wherein, The monitoring chip is used to collect the voltage and current signals of each DC power module (200), backup battery (300), and main power supply, and to calculate their respective power based on their respective current and voltage signals.

6. The intrinsically safe and explosion-proof DC regulated power supply for mining according to claim 5, characterized in that, The intrinsically safe and explosion-proof DC regulated power supply for mining also includes: a temperature acquisition module (900) and a display module (1000); wherein, The temperature acquisition module (900) is used to acquire the temperature of the backup battery (300) and the load, and transmit the acquired temperature signals to the control and monitoring module (600). The control and monitoring module (600) receives and processes the acquired temperature signals. When the temperature of the backup battery (300) or the temperature of the load exceeds the threshold, the control and monitoring module (600) interrupts the charging of the backup battery (300) or stops supplying power to the load. The display module (1000) is mounted on the explosion-proof power supply box (1) and is used to display the voltage and current information of each DC power supply module (200), backup battery (300) and main power supply, as well as the temperature of the backup battery (300) and the temperature of the load.

7. The intrinsically safe and explosion-proof DC regulated power supply for mining according to claim 6, characterized in that, The control and monitoring module (600) is connected to the host computer via an RS485 communication module.

8. The intrinsically safe and explosion-proof DC regulated power supply for mining according to any one of claims 1-7, characterized in that, The explosion-proof power supply box (1) includes: an independent upper compartment and a lower compartment, with an upper cover (3) and a lower cover (4) respectively detachably provided at their openings. The upper compartment is equipped with a circuit board (2) that integrates an AC-DC module (100), a three-way DC power supply module (200), a backup battery (300), a dual power switching module (400), a dual overvoltage and overcurrent protection module (500), and a control and monitoring module (600). The lower compartment is fixedly equipped with a backup battery (300), and the lower compartment next to the backup battery (300) is fixedly equipped with a circuit board (2) that integrates an AC-DC module (100), a three-way DC power supply module (200), a backup battery (300), a dual power switching module (400), a dual overvoltage and overcurrent protection module (500), and a control and monitoring module (600). The components in the compartment and the lower compartment are connected by a JD4 explosion-proof wall-penetrating terminal (5). A battery control switch (6) is installed at the bottom of the lower compartment. The battery control switch (6) is connected to the JD4 explosion-proof wall-penetrating terminal (5). The spare battery (300) is electrically connected to the circuit board (2) through the JD4 explosion-proof wall-penetrating terminal (5). Explosion-proof cable entry terminals (7) are welded on both sides of the explosion-proof power box (1). The main power supply or load is electrically connected to the circuit board (2) through the explosion-proof cable entry terminal (7). The display module (1000) is fixed above the circuit board (2).

9. The intrinsically safe and explosion-proof DC regulated power supply for mining according to claim 8, characterized in that, An observation window (8) is provided on the upper cover (3) facing the display module (1000), and a transparent explosion-proof glass (9) is fixedly provided on the observation window (8).

10. The intrinsically safe and explosion-proof DC regulated power supply for mining according to claim 8, characterized in that, The outer walls of the upper cover (3) and the lower cover (4) are respectively hinged with handles (10).

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