Method and system for constructing a safe underground charging environment

Abstract

The present application provides a method and system for constructing a safe underground charging environment. When the electrical equipment detection module detects the underground electrical equipment to be charged, it sends a safe environment construction instruction to the central controller; when the central controller receives the safe environment construction instruction, it controls each back pressure module to open. In this way, the back pressure module can introduce the external ambient air in the underground ventilation duct into multiple first air inlet ducts, and increase the air pressure of the external ambient air to the target pressure; then, the back pressure module blows the external ambient air at the target pressure into the charging cavity from the air outlet. Since the air outlet is arranged in an array, the charging cavity can be purged evenly; and since the air pressure of the external ambient air at the air outlet reaches the target pressure, the flammable and explosive substances such as coal dust and gas in the charging cavity can be reliably blown out of the charging cavity, so that the charging cavity remains full of external ambient air, and a safe charging environment is constructed.

Description

Technical Field

[0001] The present application relates to the field of intelligent control technology, and in particular to a method and system for constructing a safe underground charging environment. Background Art

[0002] Coal mining produces large amounts of gas and coal dust. The hazardous conditions created by the combined effects of these gases make underground coal mines a high-risk electrical environment. The resulting gas explosions have become a significant obstacle to the high-quality development of the coal industry. With the expansion of production scale and increasing automation, higher requirements are being placed on the safe use of electricity in underground electrical equipment (such as underground inspection robots and coal transport vehicles) in high-risk electrical environments such as gas- and coal-dust mines.

[0003] At present, when underground electrical equipment is charging underground, the sparks generated during the plugging and unplugging of wired charging or the electromagnetic field energy of wireless charging act on the gas and coal dust environment underground, which can easily cause explosion accidents and cause personal injury and property damage. Summary of the Invention

[0004] The present application provides a method and system for constructing a safe underground charging environment, which is used to solve the problem in the prior art that when underground electrical equipment is charging underground, sparks generated during wired charging or the electromagnetic field energy of wireless charging act on the gas and coal dust environment underground, which is very likely to cause explosion accidents.

[0005] In a first aspect, the present application provides a system for constructing a safe underground charging environment, including a central controller, a charging cabinet, a plurality of first air inlet ducts arranged at intervals, a charging power supply, and an electrical equipment detection module. An opening on one side of the charging cabinet located below the preset underground ventilation duct forms a charging cavity, and the charging power supply and electrical equipment detection module are arranged in the charging cavity; a plurality of array-arranged air outlets are provided on the side of the charging cabinet opposite to the opening, and the tops of the plurality of first air inlet ducts are connected to the underground ventilation duct; the plurality of first air inlet ducts extend from the top to one side of one column of the plurality of air outlets, and each first air inlet duct is provided with a back pressure module; the electrical equipment detection module is used to send a safety environment construction instruction to the central controller when the underground electrical equipment to be charged is detected; the central controller is used to control the opening of each back pressure module when receiving the safety environment construction instruction; the back pressure module is used to introduce the external ambient air in the underground ventilation duct into the plurality of first air inlet ducts, and increase the air pressure of the external ambient air to the target pressure; the back pressure module is also used to blow the external ambient air at the target pressure from the air outlet into the charging cavity to construct a safe charging environment.

[0006] In some embodiments, each backpressure module includes a first-level backpressure valve and a second-level backpressure valve, each first-level backpressure valve is disposed near the top of the corresponding first air inlet duct, and each second-level backpressure valve is disposed at a position corresponding to the air outlet of a first air inlet duct. Each first-level backpressure valve is used to introduce ambient air from the underground ventilation duct into multiple first air inlet ducts and initially increase the pressure of the ambient air to a first pressure, wherein the pressure difference between the first pressure and a preset target pressure is less than a set pressure difference threshold; each second-level backpressure valve is used to increase the first pressure after the initial increase, purge the charging cavity through the corresponding air outlet, and detect the second pressure at the outlet of the second-level backpressure valve; the central controller is specifically used to adjust the opening of the second-level backpressure valve according to the second difference between the second pressure and the target pressure when the second pressure does not reach the target pressure, so that the second pressure reaches the target pressure.

[0007] In some embodiments, an opening area of ​​the air outlet on a side away from the first air inlet duct is larger than an opening area of ​​the air outlet on a side close to the first air inlet duct.

[0008] In some embodiments, the air outlet is in the shape of a truncated cone or a polygonal cone.

[0009] In some embodiments, the system further includes a second air inlet duct, which is provided with a gas drying module, the top end of the second air inlet duct is connected to the underground ventilation duct, and the bottom end of the second air inlet duct is connected to the first air inlet duct.

[0010] In some embodiments, the system further includes a flammable gas sensor disposed in the charging chamber, the flammable gas sensor being electrically connected to the central controller, which is also electrically connected to the charging power supply, and the flammable gas sensor being configured to detect the concentration of flammable gas in the charging chamber and transmit the concentration to the central controller;

[0011] The central controller is also used to control the charging power supply to be disconnected from the downhole electrical equipment when it is determined that the downhole electrical equipment is in a charging state and the concentration of the flammable gas in the charging cavity is greater than a set concentration threshold.

[0012] In some embodiments, each of the plurality of first air inlet ducts is distributed as an independent duct, or the plurality of first air inlet ducts are integrated into one supporting assembly.

[0013] In some embodiments, the central controller controls each backpressure module to close after detecting that the downhole electrical equipment has left the charging chamber.

[0014] In some embodiments, the charging power source is a wired charging power source or a wireless charging power source.

[0015] On the second aspect, the present application also provides a method for constructing a safe underground charging environment, which is applied to a system for constructing a safe underground charging environment, wherein the system provided by the present application includes a central controller, a charging cabinet, a plurality of first air inlet ducts arranged at intervals, a charging power supply, and an electrical equipment detection module. An opening on one side of the charging cabinet located below a preset underground ventilation duct forms a charging cavity, and the charging power supply and the electrical equipment detection module are arranged in the charging cavity; a plurality of array-arranged air outlets are provided on the side of the charging cabinet opposite to the opening, and the top ends of the plurality of first air inlet ducts are connected to the underground ventilation duct; the plurality of first air inlet ducts extend from the top to On one side of one column of air outlets of multiple air outlets, each first air inlet duct is provided with a back pressure module. The method provided in the present application includes: when the electrical equipment detection module detects the underground electrical equipment to be charged, it sends a safety environment construction instruction to the central controller; when the central controller receives the safety environment construction instruction, it controls each back pressure module to open; the back pressure module introduces the external ambient air in the underground ventilation duct into the multiple first air inlet ducts, and increases the air pressure of the external ambient air to the target pressure; the back pressure module blows the external ambient air at the target pressure from the air outlet into the charging cavity to build a safe charging environment.

[0016] The present application provides a method and system for constructing a safe underground charging environment. When the electrical equipment detection module detects underground electrical equipment to be charged, it sends a safe environment construction instruction to the central controller; when the central controller receives the safe environment construction instruction, it controls each back pressure module to open. In this way, the back pressure module can introduce the external ambient air in the underground ventilation duct into multiple first air inlet ducts and increase the air pressure of the external ambient air to the target pressure; then, the back pressure module blows the external ambient air at the target pressure into the charging cavity from the air outlet. Since the air outlet is arranged in an array, the charging cavity can be purged evenly; and since the air pressure of the external ambient air at the air outlet reaches the target pressure, the flammable and explosive substances such as coal dust and gas in the charging cavity can be reliably blown out of the charging cavity, so that the charging cavity remains full of external ambient air, and a safe charging environment is constructed. When the underground electrical equipment is charging in the charging cavity, no explosion accident will occur, thereby avoiding personal and property losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1A schematic diagram of the structure of a system for establishing an underground safe charging environment provided in an embodiment of the present application;

[0019] Figure 2 A schematic structural diagram of a plurality of first air inlet ducts, a first-stage back-pressure valve, a second-stage back-pressure valve, and an air outlet provided in an embodiment of the present application from a first perspective;

[0020] Figure 3 A schematic structural diagram of a plurality of first air inlet ducts, a first-level back pressure valve, and an air outlet provided in an embodiment of the present application from a second perspective;

[0021] Figure 4 Flowchart of a method for establishing a safe underground charging environment provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0023] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments of the present disclosure. These figures are not drawn to scale, and for the purpose of clarity, certain details are exaggerated and certain details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0024] In the context of the present disclosure, when a layer / element is referred to as being "on" another layer / element, it can be directly on the other layer / element or an intervening layer / element may be present therebetween. In addition, if a layer / element is "on" another layer / element in one orientation, it may be "below" the other layer / element when the orientation is reversed.

[0025] Below, the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0026] See also Figure 1An embodiment of the present application provides a system for constructing a safe underground charging environment, including a central controller 9, a charging cabinet 8, a plurality of first air inlet ducts 3 arranged at intervals, a charging power supply 6, and an electrical equipment detection module 12.

[0027] The charging cabinet 8 is located below the preset underground ventilation duct 1 and has an opening on one side to form a charging cavity 10, wherein the underground ventilation duct 1 can allow the external ambient air to enter the underground. Figure 1 As shown, the charging cabinet 8 is a rectangular parallelepiped with one side open. A charging power supply 6 and an electrical equipment detection module 12 are disposed within the charging chamber 10. The charging power supply 6 is used to charge underground electrical equipment (such as underground inspection robots or coal mine transport vehicles) within the charging chamber 10. Exemplarily, the charging power supply 6 is a wired or wireless charging power supply.

[0028] The side of the charging cabinet 8 opposite to the opening is provided with a plurality of air outlets 7 arranged in an array. Figure 1 The middle air outlets 7 are arranged in 3 rows and 5 columns). The top ends of the multiple first air inlet ducts 3 are connected to the underground ventilation duct 1. Each of the multiple first air inlet ducts 3 can be an independent duct, or the multiple first air inlet ducts 3 can also be integrated into a support assembly.

[0029] Furthermore, a plurality of first air inlet ducts 3 extend from the top to one side of one of the columns of the plurality of air outlets 7, and each first air inlet duct 3 is provided with a back pressure module. The number of the first air inlet ducts 3 is the same as the number of the columns of the air outlets 7, such as Figure 1 As shown, the plurality of first air inlet ducts 3 include five first air inlet ducts 3. Of course, the number of the first air inlet ducts 3 and the number of rows of the air outlets 7 can also be 6 or 7, etc., which is not limited here.

[0030] The electrical equipment detection module 12 is used to send a safety environment construction instruction to the central controller 9 when detecting underground electrical equipment to be charged.

[0031] In some embodiments, the electrical equipment detection module 12 can be a camera that captures images inside the charging cavity 10. When it is recognized that there is underground electrical equipment in the image, a safe environment construction instruction is sent to the central controller 9; in other embodiments, the electrical equipment detection module 12 can also be an infrared transmitting module and an infrared receiving module that are relatively set. When the infrared receiving module detects that the infrared rays emitted by the infrared transmitting module are blocked, a safe environment construction instruction is sent to the central controller 9.

[0032] The central controller 9 is used to control the activation of each backpressure module upon receiving a safe environment creation instruction. It is understood that the number of backpressure modules is the same as the number of first air inlet ducts 3. The backpressure modules are used to introduce ambient air from the underground ventilation duct 1 into the multiple first air inlet ducts 3 and increase the pressure of the ambient air to the target pressure. The backpressure modules are also used to purge the ambient air at the target pressure from the air outlet 7 into the charging chamber 10 to create a safe charging environment.

[0033] For example, Figure 2 As shown, each back pressure module includes a primary back pressure valve 4 and a secondary back pressure valve 11. Figure 2 and Figure 3 As shown, each primary back pressure valve 4 is arranged near the top of the corresponding first air inlet duct 3. Figure 2 As shown, each secondary back-pressure valve 11 is arranged at a position corresponding to the air outlet 7 of a first air inlet pipe 3. Each primary back-pressure valve 4 is used to introduce the external ambient air in the underground ventilation pipe 1 into multiple first air inlet pipes 3, and initially increase the air pressure of the external ambient air to the first air pressure, wherein the air pressure difference between the first air pressure and the preset target air pressure is less than the set air pressure difference threshold. Exemplarily, the primary back-pressure valve 4 can be, but is not limited to, a pilot-operated pneumatic back-pressure valve, which can maintain a constant output air pressure. Further, each secondary back-pressure valve 11 is used to increase the first air pressure after the initial increase again, and to purge the charging cavity 10 through the corresponding air outlet 7 and detect the second air pressure at the outlet of the secondary back-pressure valve 11. Exemplarily, the secondary back-pressure valve 11 can be, but is not limited to, an electronic proportional valve or an electric mechanical spring valve, which can adjust the air pressure of the air outlet 7 according to the set parameters.

[0034] The central controller 9 is specifically configured to adjust the opening of the secondary back-pressure valve 11 based on a second difference between the second and target pressures, if the second air pressure does not reach the target pressure, so that the second air pressure reaches the target pressure. This allows the air pressure at the air outlet 7 to be accurately raised to the target pressure, effectively purging flammable and explosive gases from the charging chamber 10.

[0035] In summary, the embodiments of the present application provide a method for establishing a safe underground charging environment. Upon detecting underground electrical equipment to be charged, the electrical equipment detection module 12 sends a safe environment establishment instruction to the central controller 9. Upon receiving the safe environment establishment instruction, the central controller 9 controls each backpressure module to activate. In this manner, the backpressure module can introduce ambient air from the underground ventilation duct 1 into the multiple first air inlet ducts 3 and increase the pressure of the ambient air to a target pressure. Furthermore, the backpressure module blows the ambient air at the target pressure into the charging chamber 10 from the air outlet 7. Because the air outlets 7 are arranged in an array, the charging chamber 10 can be evenly purged. Furthermore, because the pressure of the ambient air at the air outlet 7 reaches the target pressure, flammable and explosive substances such as coal dust and gas in the charging chamber 10 can be reliably purged out of the charging chamber 10, ensuring that the charging chamber 10 remains filled with ambient air, thus establishing a safe charging environment. When the underground electrical equipment is being charged in the charging chamber 10 , no explosion accident will occur, thus avoiding personal and property losses.

[0036] For example, Figure 2 and Figure 3 As shown, the opening area of ​​each air outlet 7 on the side away from the first air inlet duct 3 is larger than the opening area of ​​the air outlet 7 on the side closer to the first air inlet duct 3 (for example, the air outlet 7 may be, but is not limited to, a truncated cone or a multi-sided pyramid). This increases the range of ambient air that is swept. Multiple air outlets 7 can purge all areas within the charging chamber 10 without blind spots, improving the reliability of purging flammable and explosive gases from the charging chamber 10.

[0037] In addition, the system provided in this embodiment of the present application also includes a second air inlet duct, which is equipped with a gas drying module 2. The top end of the second air inlet duct is connected to the downhole ventilation duct 1, and the bottom end of the second air inlet duct is connected to the first air inlet duct 3. Gas drying module 2 can dehumidify the ambient air flowing into each second air inlet duct to effectively purge the charging chamber 10. Gas drying module 2 can be, but is not limited to, an adsorption dryer that meets the performance requirement of an output air source dew point below -20°C.

[0038] In addition, the system provided in the embodiment of the present application further includes a flammable gas sensor 5 (such as a methane sensor or a hydrogen sensor) disposed within the charging chamber 10. The flammable gas sensor 5 is electrically connected to the central controller 9. The flammable gas sensor 5 can be a catalytic combustion, semiconductor, or laser gas sensor to achieve high sensitivity and rapid response.

[0039] The central controller 9 is also electrically connected to the charging power supply 6. The flammable gas sensor 5 is used to detect the concentration of flammable gas in the charging chamber 10 and transmit it to the central controller 9. The central controller 9 is also used to control the charging power supply 6 to disconnect the underground electrical equipment and issue an alarm if it determines that the underground electrical equipment is in a charging state and the flammable gas concentration in the charging chamber 10 exceeds a set concentration threshold. This can prevent explosion accidents.

[0040] In addition, after detecting that the underground electrical equipment has left the charging chamber 10, the central controller 9 controls each back pressure module to close, thereby saving energy consumption.

[0041] In addition, the present embodiment also provides a method for establishing a safe underground charging environment, which is applied to a system for establishing a safe underground charging environment. It should be noted that the basic principles and technical effects of the method for establishing a safe underground charging environment provided in the present embodiment are the same as those of the above embodiment. For the sake of simplicity, any parts not mentioned in the present embodiment can be referred to the corresponding content in the above embodiment.

[0042] Specifically, as Figure 1 As shown, the system provided by the embodiment of the present application includes a central controller), a charging cabinet 8, a plurality of first air inlet ducts 3 arranged at intervals, a charging power supply 6 and an electrical equipment detection module 12. The central controller 9 is electrically connected to the first-level back pressure valve 4 and the second-level back pressure valve 11 respectively. A charging cavity 10 is formed at one side of the charging cabinet 8 located below the preset underground ventilation duct 1. The charging power supply 6 and the electrical equipment detection module 12 are arranged in the charging cavity 10; a plurality of array-arranged air outlets 7 are provided on the side of the charging cabinet 8 opposite to the opening, and the tops of the plurality of first air inlet ducts 3 are connected to the underground ventilation duct 1; the plurality of first air inlet ducts 3 extend from the top to one side of one of the plurality of air outlets 7, and each first air inlet duct 3 is provided with a back pressure module. As shown Figure 4 As shown, the method provided in the embodiment of the present application includes:

[0043] S301 : When the electrical equipment detection module 12 detects underground electrical equipment to be charged, it sends a safety environment construction instruction to the central controller 9 .

[0044] S302: Upon receiving the safety environment construction instruction, the central controller 9 controls each back pressure module to start.

[0045] S303: The back pressure module introduces the external ambient air in the underground ventilation duct 1 into the multiple first air inlet ducts 3, and increases the air pressure of the external ambient air to the target pressure.

[0046] S304: The back pressure module blows the ambient air at the target pressure from the air outlet 7 into the charging cavity 10 to create a safe charging environment.

[0047] In some embodiments, each back pressure module includes a primary back pressure valve 4 and a secondary back pressure valve 11. Each primary back pressure valve 4 is disposed near the top of the corresponding first air inlet duct 3, and each secondary back pressure valve 11 is disposed at a position corresponding to the air outlet 7 of a first air inlet duct 3. Specifically, the above-mentioned S303-S304 can be specifically implemented as follows:

[0048] Step 1: Each first-level back pressure valve 4 introduces the external ambient air in the underground ventilation pipe 1 into multiple first air inlet pipes 3, and initially increases the air pressure of the external ambient air to the first air pressure, wherein the pressure difference between the first air pressure and the preset target air pressure is less than the set pressure difference threshold.

[0049] Step 2: Each secondary back pressure valve 11 increases the first air pressure after the initial increase again, purges the charging cavity 10 through the corresponding air outlet 7, and detects the second air pressure at the outlet of the secondary back pressure valve 11.

[0050] Step 3: When the second air pressure does not reach the target air pressure, the opening of the secondary back pressure valve 11 is adjusted according to a second difference between the second air pressure and the target air pressure, so that the second air pressure reaches the target air pressure.

[0051] While the above description does not provide detailed technical details regarding the patterning of each layer, those skilled in the art will appreciate that various technical means can be employed to form layers, regions, and the like in desired shapes. Furthermore, those skilled in the art may devise methods that differ from those described above to achieve the same structure. Furthermore, while each embodiment has been described separately, this does not mean that the measures in each embodiment cannot be advantageously combined.

[0052] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0053] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A system for constructing an underground safe charging environment, characterized in that: It includes a central controller, a charging cabinet, a plurality of first air inlet ducts arranged at intervals, a charging power supply and an electrical equipment detection module. A charging cavity is formed by an opening on one side of the charging cabinet located below the preset underground ventilation duct, and the charging power supply and the electrical equipment detection module are arranged in the charging cavity; A plurality of air outlets arranged in an array are provided on a side of the charging cabinet opposite to the opening, and the top ends of the plurality of first air inlet ducts are connected to the underground ventilation duct; A plurality of the first air inlet ducts extend from the top to one side of one column of the plurality of air outlets, and each of the first air inlet ducts is provided with a back pressure module; The electrical equipment detection module is used to send a safety environment construction instruction to the central controller when detecting underground electrical equipment to be charged; The central controller is used to control each of the back pressure modules to start up when receiving the safety environment construction instruction; The back pressure module is used to introduce the external ambient air in the underground ventilation duct into the plurality of first air inlet ducts and increase the air pressure of the external ambient air to a target pressure; The back pressure module is also used to blow external ambient air at the target air pressure from the air outlet into the charging cavity to create a safe charging environment.

2. The system according to claim 1, wherein: Each of the back pressure modules includes a primary back pressure valve and a secondary back pressure valve, each of the primary back pressure valves is disposed at a position close to the top end of the corresponding first air inlet duct, and each of the secondary back pressure valves is disposed at a position corresponding to the air outlet of one of the first air inlet ducts. Each of the first-stage back-pressure valves is configured to introduce ambient air from the underground ventilation duct into the plurality of first air inlet ducts and initially increase the pressure of the ambient air to a first pressure, wherein the pressure difference between the first pressure and a preset target pressure is less than a set pressure difference threshold; Each of the secondary back-pressure valves is configured to increase the first air pressure after the initial increase, purge the charging cavity through the corresponding air outlet, and detect the second air pressure at the outlet of the secondary back-pressure valve; The central controller is specifically configured to adjust the opening of the secondary back pressure valve according to a second difference between the second air pressure and the target air pressure when the second air pressure does not reach the target air pressure, so that the second air pressure reaches the target air pressure.

3. The system according to claim 1, wherein: An opening area of ​​the air outlet on a side away from the first air inlet duct is larger than an opening area of ​​the air outlet on a side close to the first air inlet duct.

4. The system according to claim 3, characterized in that The air outlet is in the shape of a truncated cone or a polygonal cone.

5. The system according to claim 1, wherein: The system also includes a second air inlet duct, which is provided with a gas drying module. The top end of the second air inlet duct is connected to the underground ventilation duct, and the bottom end of the second air inlet duct is connected to the first air inlet duct.

6. The system according to claim 1, wherein: The system further includes a flammable gas sensor disposed in the charging cavity, the flammable gas sensor being electrically connected to the central controller, which is also electrically connected to the charging power supply, and the flammable gas sensor being used to detect the concentration of flammable gas in the charging cavity and transmit the concentration to the central controller; The central controller is further configured to control the charging power supply to be disconnected from the downhole electrical equipment when it is determined that the downhole electrical equipment is in a charging state and the concentration of the flammable gas in the charging chamber is greater than a set concentration threshold.

7. The system according to claim 1, wherein: Each of the plurality of first air inlet ducts is distributed as an independent duct, or the plurality of first air inlet ducts are integrated into one supporting assembly.

8. The system according to any one of claims 1 to 7, characterized in that: After detecting that the downhole electrical equipment leaves the charging chamber, the central controller controls each of the back pressure modules to close.

9. The system according to any one of claims 1 to 7, characterized in that: The charging power source is a wired charging power source or a wireless charging power source.

10. A method for constructing a safe underground charging environment, characterized in that: The invention is applied to a system for constructing a safe underground charging environment, wherein the system includes a central controller, a charging cabinet, a plurality of first air inlet ducts arranged at intervals, a charging power supply, and an electrical equipment detection module. An opening on one side of the charging cabinet located below a preset underground ventilation duct forms a charging cavity, and the charging power supply and the electrical equipment detection module are arranged in the charging cavity; a plurality of air outlets arranged in an array are provided on a side of the charging cabinet opposite to the opening, and the top ends of the plurality of first air inlet ducts are in communication with the underground ventilation duct; the plurality of first air inlet ducts extend from the top ends to one side of a row of the plurality of air outlets, and each first air inlet duct is provided with a back pressure module. The method includes: The electrical equipment detection module sends a safety environment construction instruction to the central controller when detecting the underground electrical equipment to be charged; Upon receiving the safety environment construction instruction, the central controller controls each of the back pressure modules to start; The back pressure module introduces the external ambient air in the underground ventilation duct into the plurality of first air inlet ducts and increases the air pressure of the external ambient air to a target pressure; The back pressure module blows the external ambient air at the target pressure into the charging cavity from the air outlet to create a safe charging environment.

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