Combustible gas leakage protection system

Abstract

The invention provides a combustible gas leakage protection system, which is characterized in that a control module of the combustible gas leakage protection system judges whether the concentration of combustible gas is lower than a first concentration threshold value or not when receiving concentration information detected by a concentration detection module, and generates a first control instruction when the concentration of the combustible gas is not lower than the first concentration threshold value. The control module further generates a second control instruction when the combustible gas concentration is not lower than a second concentration threshold value and the flame detection module detects that no open fire exists, and generates a third control instruction when the combustible gas concentration is not lower than the second concentration threshold value and the open fire exists. And the protection module executes different protection actions according to different control instructions of the control module. According to the application, the response scheme is divided into three grades, and corresponding protection strategies are implemented according to the detection signals of different grades, so that the response sensitivity and accuracy when the combustible gas leaks can be remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of combustible gas safety equipment, and in particular to a combustible gas leakage protection system. Background Art

[0002] Combustible gas is a state of combustible matter that can evenly mix with air (or oxygen) within a certain concentration range to form a premixed gas. It can explode upon contact with a fire source, releasing large amounts of energy during combustion. With the widespread use of combustible gases such as natural gas and hydrogen in industrial production and daily life, fires and explosions caused by gas leaks are becoming frequent, posing serious safety risks.

[0003] Most existing combustible gas detection systems use a single method for concentration detection, have a single alarm mechanism, and lack an effective graded response strategy, especially in the event of high-concentration leaks or the presence of ignition sources. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a combustible gas leakage protection system to solve the above technical problems.

[0005] Based on the above objectives, the present application provides a combustible gas leakage protection system, comprising:

[0006] Concentration detection module, used to detect the concentration information of combustible gas in the use environment;

[0007] Flame detection module, used to detect flame information in the use environment;

[0008] a control module, connected to the concentration detection module and the flame detection module respectively, the control module being configured to determine whether the combustible gas concentration is lower than a first concentration threshold upon receiving the concentration information, and to generate a first control instruction when the combustible gas concentration is not lower than the first concentration threshold; the control module generating a second control instruction when the combustible gas concentration is not lower than a second concentration threshold and there is no open flame; the control module generating a third control instruction when the combustible gas concentration is not lower than the second concentration threshold and there is no open flame; the control module generating a third control instruction when the combustible gas concentration is not lower than the second concentration threshold and there is an open flame; wherein the second concentration threshold is greater than the first concentration threshold;

[0009] The protection module is connected to the control module and is used to perform different protection actions according to different control instructions of the control module.

[0010] Optionally, the protection module includes a first execution module, a second execution module, and a third execution module, wherein the first execution module, the second execution module, and the third execution module are respectively configured to execute corresponding protection actions upon receiving the first control instruction, the second control instruction, and the third control instruction; the first execution module includes:

[0011] Audible and visual alarms; and

[0012] The gas valve control unit includes a first solenoid valve and a combustible gas supply pipeline. When the gas valve control unit receives the first control instruction, it closes the first solenoid valve to cut off the gas supply pipeline.

[0013] Optionally, the use environment of the combustible gas leakage protection system is a semi-enclosed chamber with double-opening windows, and the first execution module further includes:

[0014] a window opening device, comprising a plurality of supports and a plurality of slide rails, each of the slide rails being connected to a corresponding one of the sashes of the double-opening window via one of the supports, the window opening device opening the double-opening window upon receiving the first control instruction;

[0015] The fan control unit includes a central fan arranged at the top of the semi-enclosed chamber. The fan control unit automatically starts when receiving the first control instruction to discharge the combustible gas in the semi-enclosed chamber.

[0016] Optionally, the second execution module includes:

[0017] An inert gas dilution unit includes an inert gas bottle, a second solenoid valve, a connecting pipe, and multiple air inlets connected in sequence. The inert gas dilution unit automatically opens upon receiving the second control instruction and controls the second solenoid valve to open the inert gas bottle. The inert gas passes through the connecting pipe and is sprayed into the use environment through the air inlet. The multiple air inlets are spaced apart and arranged at different heights to achieve stratified release of the inert gas.

[0018] Optionally, the third execution module includes:

[0019] The fire extinguishing unit includes a fire extinguishing tank, a third solenoid valve, a delivery pipe and multiple nozzles connected in sequence. The fire extinguishing unit automatically opens upon receiving the third control instruction and controls the third solenoid valve to open the fire extinguishing tank. The fire extinguishing agent passes through the delivery pipe and is sprayed out from the nozzle; wherein the multiple nozzles are spaced apart and arranged at different heights to achieve multi-level fire extinguishing coverage.

[0020] Optionally, the concentration detection module includes:

[0021] Infrared absorption sensor, used for quantitative detection of combustible gas molecules;

[0022] Catalytic combustion sensor, used for fast response compensation at low combustible gas concentrations.

[0023] Optionally, the flame detection module includes an infrared flame sensor for real-time monitoring of flame information in the use environment.

[0024] Optionally, the control module includes:

[0025] Cloud data platform for remote monitoring and data uploading;

[0026] A central monitoring unit, connected to the cloud data platform, for issuing control instructions;

[0027] The remote communication unit is connected to the cloud data platform and is used to connect the cloud data platform with each execution module.

[0028] Optionally, the control module further includes:

[0029] A system reset unit is connected to the cloud data platform. When the concentration of the combustible gas drops below a first concentration threshold, the system reset unit turns off the protection module, restores the detection status of the concentration detection module and the flame detection module, and records the event.

[0030] Optionally, the control module further includes:

[0031] The human-computer interaction terminal is connected to the cloud data platform and is used to manually adjust or terminate corresponding protective actions according to on-site conditions.

[0032] The combustible gas leakage protection system provided by the present application includes a concentration detection module, a flame detection module, a control module and a protection module. The control module is configured to determine whether the combustible gas concentration is lower than a first concentration threshold when receiving concentration information, and to generate a first control instruction when the combustible gas concentration is not lower than the first concentration threshold. The control module generates a second control instruction when the combustible gas concentration is not lower than a second concentration threshold and there is no open flame. The control module generates a third control instruction when the combustible gas concentration is not lower than the second concentration threshold and there is an open flame. The second concentration threshold is greater than the first concentration threshold. The protection module is connected to the control module and is used to perform different protection actions according to different control instructions of the control module. The present application divides the response scheme into three levels according to the two concentration thresholds of the combustible gas and in combination with the presence or absence of an open flame, and implements corresponding protection strategies according to different levels of detection signals, thereby realizing effective hierarchical control and protection of the combustible gas leakage protection system, significantly improving the sensitivity and accuracy of the response when a combustible gas leak occurs, and effectively improving the safety of the combustible gas leakage protection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 is a schematic structural diagram of a combustible gas leakage protection system according to a specific embodiment of the present application;

[0035] Figure 2 is a schematic structural diagram of a window sash in a closed state according to a specific embodiment of the present application;

[0036] Figure 3 It is a schematic structural diagram of a window sash in an open state according to a specific embodiment of the present application.

[0037] Description of reference numerals:

[0038] 100. Combustible gas leakage protection system;

[0039] 10. Concentration detection module; 11. Infrared absorption sensor; 12. Catalytic combustion sensor;

[0040] 20. Flame detection module; 21. Infrared flame sensor;

[0041] 30. Control module; 31. Cloud data platform; 32. Central monitoring unit; 33. Remote communication unit;

[0042] 40. First execution module; 41. Sound and light alarm; 42. Air valve control unit; 421. First solenoid valve; 422. Air supply pipe; 43. Window opening device; 431. Support member; 432. Slide rail; 433. Window sash; 44. Fan control unit; 441. Central fan;

[0043] 50. Second execution module; 51. Inert gas bottle; 52. Second solenoid valve; 53. Connecting pipe; 54. Air inlet;

[0044] 60. Third execution module; 61. Fire extinguisher; 62. Third solenoid valve; 63. Delivery pipeline; 64. Nozzle;

[0045] 70. Semi-enclosed chamber. DETAILED DESCRIPTION

[0046] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0047] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Inside", "outside" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] like Figure 1-Figure 3 As shown, an embodiment of the present application provides a combustible gas leakage protection system 100, which includes a concentration detection module 10, a flame detection module 20, a control module 30, and a protection module. The concentration detection module 10 is used to detect the concentration of combustible gas in the operating environment. The flame detection module 20 is used to detect flame information in the operating environment.

[0049] The control module 30 is connected to the concentration detection module 10 and the flame detection module 20, respectively. The control module 30 is configured to determine whether the combustible gas concentration is lower than a first concentration threshold upon receiving concentration information, and to generate a first control instruction when the combustible gas concentration is not lower than the first concentration threshold. The control module 30 generates a second control instruction when the combustible gas concentration is not lower than a second concentration threshold and there is no open flame. The control module 30 generates a third control instruction when the combustible gas concentration is not lower than the second concentration threshold and there is an open flame. The second concentration threshold is greater than the first concentration threshold. The protection module is connected to the control module 30 and is used to perform different protection actions according to different control instructions of the control module 30.

[0050] Here, it can be understood that the protection module executes a protection action corresponding to the first control instruction when the concentration detection module 10 detects that the combustible gas reaches a low concentration threshold, executes a protection action corresponding to the second control instruction when the combustible gas reaches a high concentration threshold and the flame detection module 20 detects that there is no open flame, and executes a protection action corresponding to the third control instruction when the combustible gas reaches a high concentration threshold and the flame detection module 20 detects that there is an open flame.

[0051] In the combustible gas protection system of the embodiment of the present application, the response scheme is divided into three levels according to the two concentration thresholds of the combustible gas and the presence or absence of open flames, and corresponding protection strategies are implemented according to the detection signals of different levels, so as to achieve effective hierarchical control and protection of the combustible gas leakage protection system 100, and significantly improve the sensitivity and accuracy of the response when the combustible gas leaks, thereby effectively improving the safety of the combustible gas leakage protection system 100.

[0052] In some embodiments, the first concentration threshold is 25% LEL (Lower Explosion Limit), and the second concentration threshold is 50% LEL. The LEL refers to the lowest concentration of a combustible gas that can explode when mixed with air and exposed to an ignition source. In other embodiments, the specific values ​​of the first and second concentration thresholds can be adjusted based on actual conditions.

[0053] In some embodiments, the protection module may include a first execution module 40, a second execution module 50 and a third execution module 60, and the first execution module 40, the second execution module 50 and the third execution module 60 are respectively used to perform corresponding protection actions when the first control instruction, the second control instruction and the third control instruction are received accordingly.

[0054] Specifically, the first execution module 40 is configured to execute a corresponding protective action upon receiving a first control instruction, the second execution module 50 is configured to execute a corresponding protective action upon receiving a second control instruction, and the third execution module 60 is configured to execute a corresponding protective action upon receiving a third control instruction. Different execution modules are configured to receive different control instructions and execute corresponding protective actions. In this way, the combustible gas leak prevention system 100 employs different response strategies for different detection signals, enabling a hierarchical response of the combustible gas leak prevention system 100, thereby improving the response accuracy of the combustible gas leak prevention system 100.

[0055] The first execution module 40 may include an audible and visual alarm 41 and a gas valve control unit 42. The gas valve control unit 42 may include a first solenoid valve 421 and a combustible gas supply pipeline 422. The gas valve control unit 42 closes the first solenoid valve 421 to cut off the gas supply pipeline 422 upon receiving the first control instruction.

[0056] When the concentration of combustible gas is greater than or equal to the first concentration threshold, the sound and light alarm 41 can emit sound or light as an alarm indication according to the first control instruction, and issue an alarm in the early stage of combustible gas leakage, providing timely warning, reminding users to pay attention to safety and avoid escalation of leakage risks.

[0057] When the combustible gas concentration is greater than or equal to the first concentration threshold, the gas valve control unit 42 automatically closes the first solenoid valve 421 after receiving the first control instruction, quickly cuts off the gas source, and closes the gas supply pipeline 422 in time, fundamentally stopping the leakage of combustible gas, thereby preventing the combustible gas from continuing to spread to a dangerous concentration and reducing the risk of explosion.

[0058] In some embodiments, the flammable gas leakage prevention system 100 can be used in a fully enclosed chamber. In this fully enclosed environment, the flammable gas leakage prevention system 100 responds to different levels of flammable gas leakage in a graded manner, providing accurate responses and improving safety in the operating environment.

[0059] In some embodiments, the combustible gas leakage prevention system 100 may be used in a semi-enclosed chamber 70 having a double-sash window. The first execution module 40 may further include a window opening device 43 and a fan control unit 44. The window opening device 43 includes a plurality of supports 431 and a plurality of slide rails 432. Each slide rail 432 is connected to a corresponding window sash 433 of the double-sash window via a support 431. The window opening device 43 opens the double-sash window upon receiving a first control command.

[0060] Specifically, see Figure 2 and Figure 3 The window opening device 43 comprises two supports 431, two slide rails 432, and a motor. Each slide rail 432 is connected to a corresponding window sash 433 of the double-sash window via a support 431. When the window opening device 43 receives a first control command, the motor controls the slide rails 432 to drive the supports 431 on the window sash 433 to slide, thereby automatically opening the double-sash window. This allows for rapid ventilation of the operating environment and reduces the concentration of combustible gases in the chamber.

[0061] In some embodiments, the window opening device 43 may include two supports 431 and two slide rails 432. Each window sash 433 is connected to the corresponding slide rail 432 through a support 431. The two slide rails 432 can slide synchronously under the drive of a motor to open the double-opening window and achieve natural ventilation.

[0062] The fan control unit 44 may include a central fan 441 disposed at the top of the semi-enclosed chamber 70. The fan control unit 44 automatically activates upon receiving a first control instruction to exhaust the combustible gas within the semi-enclosed chamber 70. Here, the fan control unit 44 controls the activation of the central fan 441 upon receiving the first control instruction. The central fan 441 can forcibly exhaust the leaked gas within the semi-enclosed chamber 70, thereby accelerating air circulation and achieving dilution and circulation of the combustible gas within the chamber.

[0063] In this embodiment, the window opening device 43 and the fan control unit 44 cooperate, and the window can be opened for rapid ventilation. The central fan 441 can forcibly discharge the leaked combustible gas, thereby speeding up the air flow rate, realizing the dilution and circulation of the combustible gas in the use environment, quickly reducing the concentration of the combustible gas, avoiding the safety hazard caused by the leaked combustible gas, and improving the safety of the combustible gas leakage protection system 100.

[0064] In some embodiments, the second execution module 50 may include an inert gas dilution unit. The inert gas release unit includes an inert gas bottle 51, a second solenoid valve 52, a connecting pipe 53, and multiple air inlets 54, which are connected in sequence. The inert gas dilution unit automatically opens upon receiving the second control instruction and controls the second solenoid valve 52 to open the inert gas bottle 51. The inert gas passes through the connecting pipe 53 and is sprayed into the operating environment through the air inlet 54. The multiple air inlets 54 are spaced at different heights to achieve stratified release of the inert gas.

[0065] Here, when the combustible gas concentration is greater than or equal to the second concentration threshold and no open flame is detected, the inert gas dilution unit opens and controls the second solenoid valve 52 to open the inert gas bottle 51. After voltage stabilization and flow regulation, the inert gas is injected into the connecting pipe 53. The transported inert gas is sprayed into the chamber through the air inlets 54 located at different heights, thereby reducing the risk of combustion or explosion by changing the gas composition of the use environment.

[0066] In some embodiments, the inert gas may be nitrogen, argon, or the like. While inert gases themselves are non-combustible and non-combustible, they can mix with combustible gases in the air upon release, reducing their concentration to below the LEL (lower emission limit), thereby eliminating explosive conditions. Inert gases can also, to a certain extent, block oxygen from contacting combustible gases, inhibiting the occurrence of combustion reactions.

[0067] Specifically, see Figure 1 There are four air inlets 54, located at different heights. These staggered arrangements achieve comprehensive inerting of the operating environment and uniform release of inert gas. The four air inlets 54 are spaced apart from each other from the floor toward the ceiling, allowing for inert gas coverage and dilution at different levels, rapidly reducing the concentration of combustible gases within the chamber.

[0068] In some embodiments, the third execution module 60 may include a fire extinguishing unit, which includes a fire extinguishing tank 61, a third solenoid valve 62, a delivery pipe 63, and multiple nozzles 64 connected in sequence. The fire extinguishing unit automatically opens upon receiving the third control instruction and controls the third solenoid valve 62 to open the fire extinguishing tank 61. The fire extinguishing agent passes through the delivery pipe 63 and is ejected from the nozzles 64. The multiple nozzles 64 are located at different heights in the room to achieve multi-level fire extinguishing coverage.

[0069] Here, when the concentration of combustible gas is greater than or equal to the second concentration threshold and an open flame is detected, the fire extinguishing unit opens and controls the third solenoid valve 62 to open the fire extinguishing tank 61. The fire extinguishing agent passes through the delivery pipe 63 and is sprayed into various height areas in the chamber by the nozzles 64 located at different heights. By isolating oxygen, etc., the initial fire can be quickly extinguished or the spread of the fire can be suppressed. The formation of explosion conditions can also be suppressed by diluting the concentration of combustible gas, thereby suppressing the risk of explosion.

[0070] In some embodiments, the fire extinguishing agent can be a dry powder, the fire extinguishing tank 61 is a dry powder fire extinguishing tank 61, and the delivery pipe 63 is a powder delivery pipe. Dry powder can interrupt the combustion chain reaction, quickly inhibiting the generation of free radicals, thereby preventing the continued combustion. In other embodiments, the type of fire extinguishing agent can be selected according to actual needs, such as flame-retardant foam. Flame-retardant foam can form a coating on the surface of the burning object, blocking the contact between oxygen and combustible gases, thereby inhibiting combustion.

[0071] In some embodiments, there are four nozzles 64 arranged at different heights to achieve comprehensive fire extinguishing coverage and ensure uniform distribution of the fire extinguishing agent at different heights. In some embodiments, the nozzles 64 correspond to the positions of the air inlet 54 to achieve uniform coverage of the fire extinguishing agent across the entire space, forming a spatially layered response structure, achieving efficient coverage and treatment across the entire space, thereby improving fire extinguishing efficiency.

[0072] In some embodiments, the concentration detection module 10 may include an infrared absorption sensor 11 and a catalytic combustion sensor 12. The infrared absorption sensor 11 is used to quantitatively detect combustible gas molecules, while the catalytic combustion sensor 12 is used to quickly respond and compensate for low combustible gas concentrations.

[0073] The infrared absorption sensor 11 utilizes the Lambert-Beer law, which states that when infrared light of a specific wavelength passes through a gas, its intensity is attenuated by absorption by gas molecules, with the degree of attenuation positively correlated with the gas concentration. The infrared absorption sensor 11 has a wide measurement range, enabling high-precision detection. Furthermore, the infrared absorption sensor 11 utilizes a non-contact detection method, eliminating the need for direct chemical reaction with the gas. There is no open flame or spark during the detection process, ensuring safety.

[0074] The catalytic combustion sensor 12 is a sensor that uses the catalytic principle to detect gas. When the combustible gas contacts the catalyst on the surface of the sensor, flameless combustion occurs under the action of the catalyst. The heat generated by the combustion will increase the temperature of the sensor, which in turn causes the resistance of the sensor to change. The gas concentration is detected by measuring this resistance change.

[0075] When the concentration of combustible gas in the air is relatively low, the gas concentration may approach or fall below the lower explosive limit (LEL). However, accurate detection is still required to ensure a safe operating environment. The catalytic combustion sensor 12 can quickly respond to changes in gas concentration in low-concentration environments and compensate for the measurement results through a specific algorithm or mechanism to improve measurement accuracy and reliability. Rapid response is crucial for preventing potential hazards in a timely manner, while compensation eliminates the influence of various interfering factors on measurement results, ensuring that the sensor provides accurate measurements even at low concentrations.

[0076] In this embodiment, the infrared absorption sensor 11 and the catalytic combustion sensor 12 of the concentration detection module 10 constitute a sensor redundant detection mechanism. Through the signal fusion algorithm, the combustible gas protection system's real-time perception of changes in combustible gas concentration is enhanced, while effectively suppressing environmental interference. This design significantly improves the detection sensitivity and accuracy of combustible gas leaks, and effectively reduces the risks of false alarms and missed alarms.

[0077] In some embodiments, the flame detection module 20 may include an infrared flame sensor 21 for real-time monitoring of whether there is an open flame in the operating environment. Specifically, the infrared flame sensor 21 detects an open flame in the operating environment by sensing the unique infrared radiation spectrum characteristics and dynamic change patterns of the flame. Once the infrared flame sensor 21 detects an open flame, it triggers the third execution module 60 to initiate fire extinguishing, ensuring the timeliness and accuracy of the fire extinguishing response. Based on the concentration detection module 10, the infrared flame sensor 21 can assist in determining the response level of the combustible gas leakage protection system 100 and ensure the accuracy and timeliness of the fire extinguishing command triggering.

[0078] In some embodiments, the infrared flame sensor 21 has a 360° monitoring viewing angle and can continuously determine the stability and authenticity of flame information within a preset time.

[0079] In some embodiments, the control module 30 may include a cloud data platform 31, a central monitoring unit 32, and a remote communication unit 33. The cloud data platform 31 is used to implement remote monitoring and data upload. The central monitoring unit 32 is connected to the cloud data platform 31 to issue control instructions. The remote communication unit 33 is connected to the cloud data platform 31 to connect the cloud data platform 31 to the execution module.

[0080] The combustible gas leakage protection system 100 has a cloud-based remote reporting function, automatically recording and generating alarm and response logs to ensure data integrity and traceability.

[0081] The remote communication unit 33 connects to the cloud data platform 31 by combining wireless communication and wired communication, and supports real-time uploading and centralized management of alarm information, response status, and device status.

[0082] The central monitoring unit 32 performs centralized management of the detection sensors and each execution module, and realizes remote monitoring, data upload and log recording through the cloud data platform 31 to facilitate later data analysis, accident tracing and system optimization and maintenance.

[0083] In some embodiments, the control module 30 may also include a system reset module, which is connected to the cloud data platform 31. When the combustible gas concentration drops below the first concentration threshold, the system reset module shuts down all execution modules, restores the monitoring status of the concentration detection module 10 and the flame detection module 20, and records the event.

[0084] In the response process at any level, when the concentration detection module 10 detects that the concentration of combustible gas is continuously lower than the first concentration threshold, the system reset module will shut down all execution modules, stop the alarm information, and automatically execute the system reset process.

[0085] In some embodiments, the control module 30 may further include a human-computer interaction terminal connected to the cloud data platform 31 for manually adjusting or terminating corresponding strategies based on on-site conditions. Specifically, the human-computer interaction terminal supports manual intervention in alarm responses, response strategy adjustment, and information confirmation. Users can manually adjust or terminate response strategies based on on-site conditions.

[0086] After the audible and visual alarm module is triggered, the combustible gas leak prevention system 100 will synchronously send the alarm information to the central monitoring module. If manually confirmed as a false alarm, the monitoring terminal will respond to the current program and record the fault log. If no human intervention is performed, the combustible gas leak prevention system 100 will automatically report the alarm information to the cloud data platform 31 and maintain the current response status until the combustible gas concentration drops below the safety threshold (the first concentration threshold). The combustible gas leak prevention system 100 will automatically terminate the response program and return to the initial monitoring state.

[0087] The human-computer interaction terminal may include an APP, a receiving screen, a mobile phone, etc. Users can use their mobile phones to understand the operating status of the combustible gas leakage system and the on-site conditions of the use environment in real time, thereby achieving management and improving the efficiency of combustible gas monitoring.

[0088] This application uses a multi-modal redundant perception and signal fusion method to comprehensively utilize two different modal information of combustible gas concentration and open flame to improve perception accuracy and reliability, achieve highly sensitive monitoring of combustible gas concentration and open flame, and improve the response speed and processing efficiency in combustible gas leakage scenarios. It has strong practicality and promotion value. The combustible gas leakage protection system 100 automatically triggers a three-level linkage response mechanism according to the concentration threshold level, and realizes sound and light alarms, cuts off the combustible gas source, automatic ventilation, inert gas dilution and dry powder fire extinguishing in sequence, and supports manual intervention and remote control. The combustible gas leakage protection system 100 of this application also has an automatic reset function, which can realize real-time uploading and recording of event data.

[0089] The flammable gas leak prevention system 100 of this application incorporates a human-machine collaborative mechanism based on automatic response. After an alarm is triggered, manual confirmation and response decisions can be made, and the corresponding process can be manually adjusted or terminated based on actual on-site conditions. Furthermore, the flammable gas leak prevention system 100 has a remote reporting function, and all alarm and response processes are automatically recorded and logged, facilitating accident tracking and system management.

[0090] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0091] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A combustible gas leakage protection system, characterized in that: include: Concentration detection module, used to detect the concentration information of combustible gas in the use environment; Flame detection module, used to detect flame information in the use environment; a control module, connected to the concentration detection module and the flame detection module, respectively, the control module being configured to determine whether the combustible gas concentration is lower than a first concentration threshold upon receiving the concentration information, and to generate a first control instruction when the combustible gas concentration is not lower than the first concentration threshold; the control module generating a second control instruction when the combustible gas concentration is not lower than a second concentration threshold and there is no open flame; and the control module generating a third control instruction when the combustible gas concentration is not lower than the second concentration threshold and there is an open flame; wherein the second concentration threshold is greater than the first concentration threshold; The protection module is connected to the control module and is used to perform different protection actions according to different control instructions of the control module.

2. The combustible gas leakage protection system according to claim 1, characterized in that: The protection module includes a first execution module, a second execution module, and a third execution module. The first execution module, the second execution module, and the third execution module are respectively configured to execute corresponding protection actions upon receiving the first control instruction, the second control instruction, and the third control instruction. The first execution module includes: Audible and visual alarms; and The gas valve control unit includes a first solenoid valve and a combustible gas supply pipeline. When the gas valve control unit receives the first control instruction, it closes the first solenoid valve to cut off the gas supply pipeline.

3. The combustible gas leakage protection system according to claim 2, characterized in that: The use environment of the combustible gas leakage protection system is a semi-enclosed chamber with double-opening windows, and the first execution module further includes: a window opening device, comprising a plurality of supports and a plurality of slide rails, each of the slide rails being connected to a corresponding one of the sashes of the double-opening window via one of the supports, the window opening device opening the double-opening window upon receiving the first control instruction; The fan control unit includes a central fan arranged at the top of the semi-enclosed chamber. The fan control unit automatically starts when receiving the first control instruction to discharge the combustible gas in the semi-enclosed chamber.

4. The combustible gas leakage protection system according to claim 2, characterized in that: The second execution module includes: An inert gas dilution unit includes an inert gas bottle, a second solenoid valve, a connecting pipe, and multiple air inlets connected in sequence. The inert gas dilution unit automatically opens upon receiving the second control instruction and controls the second solenoid valve to open the inert gas bottle. The inert gas passes through the connecting pipe and is sprayed into the use environment through the air inlet. The multiple air inlets are spaced apart and arranged at different heights to achieve stratified release of the inert gas.

5. The combustible gas leakage protection system according to claim 2, characterized in that: The third execution module includes: The fire extinguishing unit includes a fire extinguishing tank, a third solenoid valve, a delivery pipe and multiple nozzles connected in sequence. The fire extinguishing unit automatically opens upon receiving the third control instruction and controls the third solenoid valve to open the fire extinguishing tank. The fire extinguishing agent passes through the delivery pipe and is sprayed out from the nozzle; wherein the multiple nozzles are spaced apart and arranged at different heights to achieve multi-level fire extinguishing coverage.

6. The combustible gas leakage protection system according to claim 1, characterized in that: The concentration detection module includes: Infrared absorption sensor, used for quantitative detection of combustible gas molecules; Catalytic combustion sensor, used for fast response compensation at low combustible gas concentrations.

7. The combustible gas leakage protection system according to claim 1, characterized in that: The flame detection module includes an infrared flame sensor for real-time monitoring of flame information in the use environment.

8. The combustible gas leakage protection system according to claim 1, characterized in that: The control module includes: Cloud data platform for remote monitoring and data uploading; A central monitoring unit, connected to the cloud data platform, for issuing control instructions; The remote communication unit is connected to the cloud data platform and is used to connect the cloud data platform with each execution module.

9. The combustible gas leakage prevention system according to claim 8, characterized in that: The control module further includes: A system reset unit is connected to the cloud data platform. When the concentration of the combustible gas drops below a first concentration threshold, the system reset unit turns off the protection module, restores the detection status of the concentration detection module and the flame detection module, and records the event.

10. The combustible gas leakage prevention system according to claim 9, characterized in that: The control module further includes: The human-computer interaction terminal is connected to the cloud data platform and is used to manually adjust or terminate corresponding protective actions according to on-site conditions.

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