A mine explosion-proof conversion method and converter based on intrinsic safety signal conversion

Abstract

The application discloses a mining explosion-proof conversion method and converter based on intrinsic safety signal conversion. The converter comprises an explosion-proof shell, an intrinsic safety power supply module, a bidirectional signal conversion unit and a communication conversion module arranged in the explosion-proof shell, and an intrinsic safety signal input port, an intrinsic safety signal output port, a non-intrinsic safety signal input port, a non-intrinsic safety signal output port and a communication interface are formed in the explosion-proof shell. The bidirectional conversion of intrinsic safety signals and non-intrinsic safety signals is realized, the non-intrinsic safety signal output is controlled by the intrinsic safety signal to drive an alternating current electromagnetic valve, different signal systems of different devices are adapted, and the safety, compatibility and control flexibility of the signal conversion in a coal mine are improved. The intrinsic safety power supply module is electrically connected with the bidirectional signal conversion unit and the communication conversion module respectively. The bidirectional signal conversion unit realizes the bidirectional conversion of intrinsic safety signals and non-intrinsic safety signals. The communication conversion module is electrically connected with the bidirectional signal conversion unit.

Description

Technical Field

[0001] This application relates to the technical field of signal conversion equipment in underground coal mines, specifically a mine explosion-proof conversion method and converter based on intrinsically safe signal conversion. It is applicable to the bidirectional conversion and control of intrinsically safe and non-safe signals in explosive environments in underground coal mines, and can realize the action control of equipment such as AC solenoid valves. Background Technology

[0002] Coal mines are explosive and hazardous environments, placing extremely high demands on the explosion-proof and intrinsically safe requirements of electrical equipment. Signal transmission in underground equipment must strictly distinguish between intrinsically safe and non-safe signals. Existing mine signal conversion equipment is mostly unidirectional, capable of only converting non-safe signals to intrinsically safe signals or vice versa, failing to meet the diverse signal control needs underground. Furthermore, some conversion devices lack dedicated communication conversion modules, resulting in poor signal conversion compatibility, difficulty in adapting to different equipment signal standards, and an inability to directly control actuators such as AC solenoid valves driven by non-safe signals using intrinsically safe signals. Consequently, the safety of signal transmission and the flexibility of control are insufficient.

[0003] To address the aforementioned issues, there is an urgent need to design a mine-use explosion-proof and intrinsically safe signal converter that can achieve bidirectional conversion between intrinsically safe and non-safe signals, adapt to multiple device signal formats, and accurately control actuators, thereby ensuring the safety, compatibility, and operability of signal conversion in underground coal mines. Summary of the Invention

[0004] The purpose of this invention is to provide a mining explosion-proof conversion method and converter based on intrinsically safe signal conversion, which realizes bidirectional conversion between intrinsically safe and non-safe signals, supports the control of non-safe signal output through intrinsically safe signals to drive AC solenoid valves, and is compatible with the signal standards of different devices, thereby improving the safety, compatibility and control flexibility of signal conversion in coal mines.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a mine explosion-proof converter based on intrinsically safe signal conversion, comprising an explosion-proof housing, wherein an intrinsically safe power module, a bidirectional signal conversion unit and a communication conversion module are disposed inside the explosion-proof housing, and an explosion-proof cable introduction device is provided on the explosion-proof housing, wherein the explosion-proof cable introduction device includes an intrinsically safe signal input port, an intrinsically safe signal output port, a non-safe signal input port, a non-safe signal output port and a communication interface; The intrinsically safe power module is electrically connected to the bidirectional signal conversion unit and the communication conversion module respectively, providing them with intrinsically safe operating power. The bidirectional signal conversion unit is electrically connected to the intrinsically safe signal input port, the intrinsically safe signal output port, the non-safe signal input port, and the non-safe signal output port, respectively, to realize bidirectional conversion between intrinsically safe and non-safe signals; The communication conversion module is electrically connected to the bidirectional signal conversion unit, and the communication conversion module is connected to the signal of external devices through the communication interface to realize the adaptation and conversion of different signal formats. The non-safe signal output port is electrically connected to the external AC solenoid valve. The non-safe signal output of the bidirectional signal conversion unit is controlled by the intrinsically safe signal to realize the action control of the AC solenoid valve.

[0006] Furthermore, the bidirectional signal conversion unit includes an intrinsically safe to non-safe circuit and a non-safe to intrinsically safe circuit. The input terminal of the intrinsically safe to non-safe circuit is connected to the intrinsically safe signal input port, and the output terminal is connected to the non-safe signal output port. The input terminal of the non-safe to intrinsically safe circuit is connected to the non-safe signal input port, and the output terminal is connected to the intrinsically safe signal output port. Both the intrinsically safe to non-safe circuit and the non-safe to intrinsically safe circuit are equipped with opto-isolation elements to improve the electrical isolation and anti-interference performance of the signal conversion.

[0007] Furthermore, the communication conversion module has a built-in multi-standard signal adapter chip, which supports signal standard matching of various equipment in coal mines. Users can send commands to the communication conversion module through an external device via the communication interface to control the signal standard of their own equipment against the signal standard of the target equipment.

[0008] Furthermore, the inner wall of the explosion-proof housing is provided with an insulating protective layer, and each port on the housing is provided with an explosion-proof sealing joint to prevent explosive gases from entering the housing and improve the explosion-proof performance of the equipment.

[0009] Furthermore, the intrinsically safe power module is equipped with overvoltage and overcurrent protection circuits. When the input voltage or current exceeds the rated value, the power supply is automatically cut off to ensure the safe operation of the intrinsically safe power module and subsequent circuits.

[0010] A mine explosion-proof conversion method based on intrinsically safe signal conversion, the method comprising the following steps: Step 1: Connect the intrinsically safe power module to the dedicated intrinsically safe power supply circuit for underground coal mines to provide a stable intrinsically safe working power supply for the bidirectional signal conversion unit and the communication conversion module. When the input voltage or working current exceeds the rated working range, the protection circuit of the intrinsically safe power module quickly cuts off the power supply circuit to avoid damage to the module due to overvoltage and overcurrent, and at the same time prevents the generation of electric sparks, ensuring the intrinsic safety of underground use. Step 2: The intrinsically safe signal is connected to the bidirectional signal conversion unit through the intrinsically safe input port, and the non-safe signal is connected to the bidirectional signal conversion unit through the non-safe signal input port. The input terminal of the intrinsically safe to non-safe circuit is connected to the intrinsically safe signal input port, and the output terminal is connected to the non-safe signal output port; the input terminal of the non-safe to intrinsically safe circuit is connected to the non-safe signal input port, and the output terminal is connected to the intrinsically safe signal output port. The bidirectional signal conversion unit realizes the bidirectional conversion between intrinsically safe and non-safe signals. Step 3: Connect the external device signal to the communication conversion module through the communication interface to achieve the adaptation and conversion of different signal formats. The non-safe signal output port is electrically connected to the external AC solenoid valve. The non-safe signal output of the bidirectional signal conversion unit is controlled by the intrinsically safe signal to realize the action control of the AC solenoid valve.

[0011] Step 4: When it is necessary to convert an intrinsically safe signal to a non-safe signal to control an AC solenoid valve, the external intrinsically safe signal is input to the intrinsically safe to non-safe circuit through the intrinsically safe signal input port. After photoelectric isolation and signal conversion, a matching non-safe signal is output from the non-safe signal output port to drive the AC solenoid valve to complete the specified action. The user can send instructions to the communication conversion module through the communication interface via their own equipment to adjust the conversion signal format to adapt to the signal requirements of the AC solenoid valve. When it is necessary to convert a non-safe signal to an intrinsically safe signal, the external non-safe signal is input to the non-safe to intrinsically safe circuit through the non-safe signal input port. After voltage reduction, current limiting and photoelectric isolation, a standard intrinsically safe signal is output from the intrinsically safe signal output port and transmitted to the intrinsically safe equipment downhole, realizing the intrinsically safe conversion of the non-safe signal. Throughout the entire operation, the intrinsically safe power module continuously provides safe power supply. The overvoltage and overcurrent protection circuit and the structural design of the explosion-proof housing ensure the safe and stable operation of the equipment in the underground explosive environment.

[0012] This application also provides a computer-readable storage medium for storing a computer program that, when run on a computer, causes the computer to perform the method described in the first aspect of this application.

[0013] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: It realizes bidirectional conversion between intrinsically safe and non-safe signals, breaking through the limitations of traditional unidirectional conversion devices, meeting the diverse signal transmission and control needs in coal mines. Simultaneously, it can control the output of non-safe signals through intrinsically safe signals, precisely driving the action of AC solenoid valves, ensuring a safe and reliable control link. The addition of a communication conversion module adapts to the signal systems of different equipment in coal mines, allowing users to control other signal systems through their own equipment's signal system, improving equipment compatibility and adaptability. The structural design employing an explosion-proof housing and explosion-proof sealing joint, combined with overvoltage and overcurrent protection of the intrinsically safe power module and opto-isolation design of the bidirectional signal conversion unit, ensures the intrinsic safety and explosion-proof performance of the equipment in the explosive environment of coal mines from both structural and circuit perspectives, significantly improving the safety of signal conversion and transmission. The overall structure is compact, wiring is simple, and operation is convenient. It can be directly integrated into existing signal control systems in coal mines without requiring large-scale modifications to existing equipment, reducing operating costs. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of a mine explosion-proof converter based on intrinsically safe signal conversion according to an embodiment of this application; Figure 2 yes Figure 1 An internal diagram.

[0015] In the diagram: 1 Explosion-proof enclosure, 2 Intrinsically safe power module, 3 Bidirectional signal conversion unit, 4 Communication conversion module, 5 Explosion-proof cable entry device. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This embodiment presents a mine explosion-proof converter based on intrinsically safe signal conversion, which is adapted to the signal conversion and control requirements of the explosive hazardous environment in underground coal mines. The core of the converter is to realize bidirectional conversion between intrinsically safe and non-safe signals, and can accurately control the output of non-safe signals through intrinsically safe signals to drive the operation of AC solenoid valves. At the same time, it supports the adaptation and control of different equipment signal systems.

[0019] Please see Figure 1 and Figure 2 This invention provides a mine explosion-proof converter based on intrinsically safe signal conversion, including an explosion-proof housing 1. The explosion-proof housing 1 is provided with an intrinsically safe power module 2, a bidirectional signal conversion unit 3 and a communication conversion module 4. The explosion-proof housing 1 is provided with an explosion-proof cable introduction device 5, which includes an intrinsically safe signal input port, an intrinsically safe signal output port, a non-safe signal input port, a non-safe signal output port and a communication interface.

[0020] The main body of this signal converter is a standard explosion-proof enclosure for mining applications. The enclosure is forged from Q355B carbon steel, and the inner wall of the enclosure is lined with a high-temperature resistant and anti-static insulating protective layer. All signal and power ports on the enclosure are equipped with mining explosion-proof cable entry devices. The mining explosion-proof cable entry devices adopt a rubber seal and metal compression structure, which can effectively prevent explosive gases from entering the inner cavity of the enclosure, meeting the requirements of the mining explosion-proof protection level. The intrinsically safe power module 2, the bidirectional signal conversion unit 3, and the communication conversion module 4 are fixedly mounted in the inner cavity of the explosion-proof enclosure 1 through an insulating mounting bracket. The modules are connected by flame-retardant and explosion-proof wiring harnesses, and the wiring harness connectors are insulated and sealed.

[0021] The inner wall of the explosion-proof housing 1 is provided with an insulating protective layer, and each port on the housing is provided with an explosion-proof sealing joint to prevent explosive gases from entering the housing and improve the explosion-proof performance of the equipment.

[0022] The intrinsically safe power module 2 is electrically connected to the bidirectional signal conversion unit 3 and the communication conversion module 4, respectively. The intrinsically safe power module 2 is the core power supply unit of the entire equipment, connected to a dedicated intrinsically safe power supply circuit for underground coal mines. Its output terminals are electrically connected to the bidirectional signal conversion unit 3 and the communication conversion module 4, providing a stable intrinsically safe operating power supply for both types of modules. The intrinsically safe power module 2 integrates overvoltage and overcurrent protection circuits. When the input voltage or operating current exceeds the rated operating range, the protection circuit can quickly cut off the power supply circuit to prevent module damage due to overvoltage or overcurrent, while also preventing electrical sparks and ensuring intrinsic safety for underground use.

[0023] The bidirectional signal conversion unit 3 is electrically connected to the intrinsically safe signal input port, the intrinsically safe signal output port, the non-safe signal input port, and the non-safe signal output port, respectively, to realize bidirectional conversion between intrinsically safe signals and non-safe signals; The bidirectional signal conversion unit 3 includes an intrinsically safe to non-safe circuit and a non-safe to intrinsically safe circuit. The input terminal of the intrinsically safe to non-safe circuit is connected to the intrinsically safe signal input port, and the output terminal is connected to the non-safe signal output port. The input terminal of the non-safe to intrinsically safe circuit is connected to the non-safe signal input port, and the output terminal is connected to the intrinsically safe signal output port. Both the intrinsically safe to non-safe circuit and the non-safe to intrinsically safe circuit are equipped with opto-isolation elements to improve the electrical isolation and anti-interference of the signal conversion.

[0024] The bidirectional signal conversion unit 3 is the core of the signal conversion. It consists of an intrinsically safe to non-safe circuit and a non-safe to intrinsically safe circuit that are independent of each other. Both circuits are connected in series with opto-isolation elements to achieve electrical isolation between the input and output signals, effectively reducing the impact of downhole electromagnetic interference on the signal conversion accuracy, and avoiding signal loop crosstalk during faults. The input terminal of the intrinsically safe to non-safe circuit is connected to the intrinsically safe signal input port on the explosion-proof housing 1, and the output terminal is connected to the non-safe signal output port. The non-safe signal output port is externally connected to the AC solenoid valve in the coal mine. When an external intrinsically safe signal is input to the intrinsically safe to non-safe circuit through the intrinsically safe signal input port, it undergoes photoelectric isolation, signal amplification, and system conversion to output a non-safe signal that matches the action of the AC solenoid valve, thereby achieving precise control of the opening, closing, starting, and stopping actions of the AC solenoid valve by the intrinsically safe signal. The input terminal of the non-safe to intrinsically safe circuit is connected to the non-safe signal input port, and the output terminal is connected to the intrinsically safe signal output port. After the external non-safe signal passes through this circuit, it completes the signal reduction, current limiting, and intrinsic safety conversion, outputting an intrinsically safe signal that meets mining standards and transmitting it to the intrinsically safe detection and control equipment in the mine, thereby achieving safe conversion and transmission of non-safe signals.

[0025] The communication conversion module 4 is electrically connected to the bidirectional signal conversion unit 3, and the communication conversion module 4 is connected to external devices via a communication interface to achieve adaptation and conversion of different signal formats. The non-safe signal output port is electrically connected to an external AC solenoid valve, and the non-safe signal output of the bidirectional signal conversion unit 3 is controlled by the intrinsically safe signal to achieve the action control of the AC solenoid valve.

[0026] The communication terminal of the communication conversion module 4 is connected to the communication interface on the explosion-proof housing 1. The communication interface is compatible with the industrial communication protocols commonly used in coal mines and can achieve signal interface with the user's own equipment. The communication conversion module 4 has a built-in multi-standard signal adaptation chip, which supports the identification and conversion of signal standards of various equipment in coal mines. Users can send signal standard control commands to the communication conversion module 4 through their own equipment. The communication conversion module 4 adjusts the signal conversion parameters of the bidirectional signal conversion unit 3 in real time according to the commands, so as to achieve precise control of the target equipment's signal standard with the signal standard of the user's own equipment, and adapt to the signal interface requirements of different brands and models of equipment in the mine.

[0027] The workflow of this invention is as follows: When it is necessary to convert an intrinsically safe signal to a non-safe signal and control an AC solenoid valve, an external intrinsically safe signal is input to the intrinsically safe to non-safe circuit via the intrinsically safe signal input port. After photoelectric isolation and signal conversion, a matching non-safe signal is output from the non-safe signal output port to drive the AC solenoid valve to complete the specified action. The user can send instructions to the communication conversion module 4 via the communication interface through their own equipment to adjust the conversion signal format to adapt to the signal requirements of the AC solenoid valve. When it is necessary to convert a non-safe signal to an intrinsically safe signal, an external non-safe signal is input to the non-safe to intrinsically safe circuit via the non-safe signal input port. After voltage reduction, current limiting and photoelectric isolation, a standard intrinsically safe signal is output from the intrinsically safe signal output port and transmitted to the intrinsically safe equipment downhole, realizing the intrinsically safe conversion of the non-safe signal. Throughout the entire operation, the intrinsically safe power module 2 continuously provides safe power supply. The overvoltage and overcurrent protection circuit and the structural design of the explosion-proof housing 1 ensure the safe and stable operation of the equipment in the underground explosive environment.

[0028] The signal converter in this embodiment has a compact overall structure and simple wiring method. It can be directly integrated into the existing signal control system in coal mines without the need for large-scale modification of the original equipment. It is easy to install and debug, and each module is modularly designed, which can be quickly disassembled and replaced during later maintenance, reducing the maintenance cost of underground equipment.

[0029] Similar to the embodiments described above, this application also provides a mine explosion-proof conversion method based on intrinsically safe signal conversion. The method uses the converter described in the foregoing embodiments and operates similarly to the aforementioned converter. The method comprises the following steps: Step 1: Connect the intrinsically safe power module to the dedicated intrinsically safe power supply circuit for underground coal mines to provide a stable intrinsically safe working power supply for the bidirectional signal conversion unit and the communication conversion module. When the input voltage or working current exceeds the rated working range, the protection circuit of the intrinsically safe power module quickly cuts off the power supply circuit to avoid damage to the module due to overvoltage and overcurrent, and at the same time prevents the generation of electric sparks, ensuring the intrinsic safety of underground use. Step 2: The intrinsically safe signal is connected to the bidirectional signal conversion unit through the intrinsically safe input port, and the non-safe signal is connected to the bidirectional signal conversion unit through the non-safe signal input port. The input terminal of the intrinsically safe to non-safe circuit is connected to the intrinsically safe signal input port, and the output terminal is connected to the non-safe signal output port; the input terminal of the non-safe to intrinsically safe circuit is connected to the non-safe signal input port, and the output terminal is connected to the intrinsically safe signal output port. The bidirectional signal conversion unit realizes the bidirectional conversion between intrinsically safe and non-safe signals. Step 3: Connect the external device signal to the communication conversion module through the communication interface to achieve the adaptation and conversion of different signal formats. The non-safe signal output port is electrically connected to the external AC solenoid valve. The non-safe signal output of the bidirectional signal conversion unit is controlled by the intrinsically safe signal to realize the action control of the AC solenoid valve.

[0030] Step 4: When it is necessary to convert an intrinsically safe signal to a non-safe signal to control an AC solenoid valve, the external intrinsically safe signal is input to the intrinsically safe to non-safe circuit through the intrinsically safe signal input port. After photoelectric isolation and signal conversion, a matching non-safe signal is output from the non-safe signal output port to drive the AC solenoid valve to complete the specified action. The user can send instructions to the communication conversion module through the communication interface via their own equipment to adjust the conversion signal format to adapt to the signal requirements of the AC solenoid valve. When it is necessary to convert a non-safe signal to an intrinsically safe signal, the external non-safe signal is input to the non-safe to intrinsically safe circuit through the non-safe signal input port. After voltage reduction, current limiting and photoelectric isolation, a standard intrinsically safe signal is output from the intrinsically safe signal output port and transmitted to the intrinsically safe equipment downhole, realizing the intrinsically safe conversion of the non-safe signal. Throughout the entire operation, the intrinsically safe power module continuously provides safe power supply. The overvoltage and overcurrent protection circuit and the structural design of the explosion-proof housing ensure the safe and stable operation of the equipment in the underground explosive environment.

[0031] Based on the same inventive concept as the above-described method embodiments, embodiments of the present invention also provide a computer program product, which includes a computer program that, when run on an electronic device, causes the electronic device to perform the conversion method in the control method according to the various exemplary embodiments of this application described above. The program product may take the form of any combination of one or more readable media. These computer program commands can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the commands executed by the processor of the computer or other programmable data processing device produce means for implementing a specified function.

[0032] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application. It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0033] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mine explosion-proof converter based on intrinsically safe signal conversion, characterized in that: Including the explosion-proof enclosure (1), The explosion-proof housing (1) is provided with an intrinsically safe power module (2), a bidirectional signal conversion unit (3) and a communication conversion module (4). An explosion-proof cable introduction device (5) is provided on the explosion-proof housing (1). The explosion-proof cable introduction device (5) includes an intrinsically safe signal input port, an intrinsically safe signal output port, a non-safe signal input port, a non-safe signal output port and a communication interface. The intrinsically safe power module (2) is electrically connected to the bidirectional signal conversion unit (3) and the communication conversion module (4) respectively; The bidirectional signal conversion unit (3) is electrically connected to the intrinsically safe signal input port, the intrinsically safe signal output port, the non-safe signal input port, and the non-safe signal output port, respectively; The communication conversion module (4) is electrically connected to the bidirectional signal conversion unit (3), and the communication conversion module (4) is connected to the signal of the external user's own equipment through the communication interface, and the non-safe signal output port is electrically connected to the external AC solenoid valve.

2. The explosion-proof converter for mining based on intrinsically safe signal conversion according to claim 1, characterized in that: The bidirectional signal conversion unit (3) includes an intrinsically safe to non-safe circuit and a non-safe to intrinsically safe circuit that are independent of each other. The input terminal of the intrinsically safe to non-safe circuit is connected to the intrinsically safe signal input port, and the output terminal is connected to the non-safe signal output port. The input terminal of the non-safe to intrinsically safe circuit is connected to the non-safe signal input port, and the output terminal is connected to the intrinsically safe signal output port. Both the intrinsically safe to non-safe circuit and the non-safe to intrinsically safe circuit are equipped with opto-isolation elements.

3. The explosion-proof converter for mining based on intrinsically safe signal conversion according to claim 1, characterized in that: The intrinsically safe power module (2) integrates overvoltage and overcurrent protection circuits.

4. The mine explosion-proof converter based on intrinsically safe signal conversion according to claim 1, characterized in that: The communication conversion module (4) has a built-in multi-standard signal adapter chip.

5. A mine explosion-proof converter based on intrinsically safe signal conversion according to claim 1, characterized in that: The explosion-proof housing (1) is made of explosion-proof metal material. The inner wall of the explosion-proof housing (1) is covered with an insulating protective layer. Explosion-proof sealing joints are installed at the intrinsically safe signal input port, intrinsically safe signal output port, non-safe signal input port, non-safe signal output port and communication interface.

6. The mine explosion-proof converter based on intrinsically safe signal conversion according to claim 1, characterized in that: The intrinsically safe power module (2), bidirectional signal conversion unit (3) and communication conversion module (4) are all fixed inside the explosion-proof housing (1) by an insulating mounting bracket, and the modules are electrically connected to each other by flame-retardant and explosion-proof wiring harnesses.

7. A mine explosion-proof converter based on intrinsically safe signal conversion according to claim 1, characterized in that: Intrinsically safe to non-safe circuits integrate signal amplification modules, while non-safe to intrinsically safe circuits integrate step-down and current-limiting modules.

8. A mine explosion-proof conversion method based on intrinsically safe signal conversion, using the converter as described in any one of claims 1 to 7, characterized in that, The method includes the following steps: Step 1: Connect the intrinsically safe power module (2) to the dedicated intrinsically safe power supply circuit for underground coal mines to provide a stable intrinsically safe working power supply for the bidirectional signal conversion unit (3) and the communication conversion module (4). When the input voltage or working current exceeds the rated working range, the protection circuit of the intrinsically safe power module (2) quickly cuts off the power supply circuit to avoid damage to the module due to overvoltage and overcurrent, and at the same time prevents the generation of electric sparks, ensuring the intrinsic safety of underground use. Step 2: The intrinsically safe signal is connected to the bidirectional signal conversion unit (3) through the intrinsically safe input port, and the non-safe signal is connected to the bidirectional signal conversion unit (3) through the non-safe signal input port. The input terminal of the intrinsically safe to non-safe circuit is connected to the intrinsically safe signal input port, and the output terminal is connected to the non-safe signal output port; the input terminal of the non-safe to intrinsically safe circuit is connected to the non-safe signal input port, and the output terminal is connected to the intrinsically safe signal output port. The bidirectional signal conversion unit (3) realizes the bidirectional conversion between intrinsically safe and non-safe signals. Step 3: Connect the external device signal to the communication conversion module (4) through the communication interface to realize the adaptation and conversion of different signal formats. The non-safe signal output port is electrically connected to the external AC solenoid valve. The non-safe signal output of the bidirectional signal conversion unit (3) is controlled by the intrinsically safe signal to realize the action control of the AC solenoid valve. Step 4: When it is necessary to convert an intrinsically safe signal to a non-safe signal and control the AC solenoid valve, the external intrinsically safe signal is input to the intrinsically safe to non-safe circuit through the intrinsically safe signal input port. After photoelectric isolation and signal conversion, the non-safe signal output port outputs a matching non-safe signal to drive the AC solenoid valve to complete the specified action. The user can send instructions to the communication conversion module (4) through the communication interface via their own equipment to adjust the conversion signal format to adapt to the signal requirements of the AC solenoid valve. When it is necessary to convert a non-safe signal to an intrinsically safe signal, the external non-safe signal is input to the non-safe to intrinsically safe circuit through the non-safe signal input port. After voltage reduction, current limiting and photoelectric isolation, the intrinsically safe signal output port outputs a standard intrinsically safe signal and transmits it to the underground intrinsically safe equipment to realize the intrinsically safe conversion of the non-safe signal. Throughout the entire working process, the intrinsically safe power module (2) continuously provides safe power supply. The overvoltage and overcurrent protection circuit and the structural design of the explosion-proof housing (1) ensure the safe and stable operation of the equipment in the underground explosive environment.

9. A readable storage medium, characterized in that, The readable storage medium stores machine-executable instructions that, when executed by a processor, use the method described in claim 8.

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