Combustible gas explosion lower limit wide-temperature detection device

Abstract

The utility model provides a combustible gas explosion lower limit wide-temperature detection device. The combustible gas explosion lower limit wide-temperature detection device is composed of a main control module, an explosion module, a precise gas distribution module, a vacuum module, a temperature control module, a monitoring module, an ignition module and a synchronous control and multi-channel data acquisition processing module. The device disclosed by the utility model can be used for carrying out gas flammability tests on combustible gases such as methane under different concentration and temperature conditions, and is used for researching influence rules of factors such as temperature, atmosphere ratio and retention time on explosion lower limits of high-concentration and low-concentration combustible gases and analyzing reaction characteristics of the gases in different temperature regions; a gas explosion lower limit change mechanism under multiple factors is defined, basic data of safe utilization of the gas is obtained, theoretical support is provided for innovation of a comprehensive utilization technology of the combustible gas, and the safety problem of efficient utilization of the combustible gas is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of combustible gas explosion detection technology, and more specifically, to a combustible gas explosion lower limit wide temperature detection device. Background Technology

[0002] The background technology for studying the influence of the lower limit of low-concentration methane explosion mainly focuses on the dynamic characteristics of methane explosions, prevention and control technologies, and key characterization technologies for explosion propagation. Low-concentration methane usually refers to methane with a volume fraction of less than 30%. Although this type of methane has a low oxygen content, it still poses a risk of combustion and explosion, which poses a challenge to resource utilization and environmental protection.

[0003] While existing technologies have made some progress in developing wide-temperature detection devices for the lower explosion limit of flammable gas explosions at different temperatures, some shortcomings remain. Firstly, although temperature control devices can adjust the temperature within the explosion container, temperature fluctuations can be significant in certain situations, affecting the accuracy and repeatability of the experiment. Maintaining a constant temperature is particularly challenging under extreme temperature conditions.

[0004] Existing pressure sensors may not respond quickly enough in rapidly changing pressure environments, making it impossible to accurately capture the maximum pressure value at the moment of explosion. This can affect the accurate assessment of the explosion characteristics of flammable gases.

[0005] While the bottom drain port facilitates the cleaning of carbon deposits, its location and structural design can make the cleaning process complex and time-consuming. Furthermore, a poor seal at the drain port can lead to leaks, affecting the safety and accuracy of the experiment.

[0006] While the synchronous control and multi-channel data acquisition and processing modules are powerful, there is still room for improvement in areas such as data processing speed, storage capacity, and user interface usability. For example, the real-time data display function is weak, making it difficult for operators to understand the experimental status and make corresponding adjustments in a timely manner.

[0007] Another significant problem with existing combustible gas lower explosion limit wide-temperature detection devices is the unsatisfactory gas mixing within the explosion container. Specifically, it is difficult to achieve a uniform gas mixture within the container, and achieving this uniform mixing within a short time is particularly challenging. This uneven gas mixing negatively impacts the performance of the entire detection device. The inability to achieve sufficient and uniform gas mixing in a short time inhibits the reaction efficiency of the combustible gas within the explosion container, thereby reducing the actual explosion efficiency and affecting the accuracy and reliability of the detection results. Therefore, we propose an improved combustible gas lower explosion limit wide-temperature detection device. Utility Model Content

[0008] The purpose of this utility model is to address the problems raised in the existing background technology. To achieve the above-mentioned purpose, this utility model provides the following technical solution: a combustible gas lower explosion limit wide temperature detection device, including an explosion module, a main control module, a precision gas distribution module, a vacuum module, a temperature control module, a monitoring module, a mechanical stirring device, an ignition module, and a synchronous control and multi-channel data acquisition and processing module. The temperature control module, the monitoring module, the ignition module, and the synchronous control and multi-channel data acquisition and processing module are inserted into the explosion module. The mechanical stirring device enters the container through a pre-reserved hole at the bottom of the explosion module. The temperature control module, the monitoring module, the ignition module, and the synchronous control and multi-channel data acquisition and processing module are connected to the main control module via connecting lines. The mechanical stirring device is installed at the bottom of the explosion module.

[0009] As a preferred technical solution of this utility model, the explosion module is provided with an explosion container. The top of the explosion container is welded and sealed to the container delivery pipeline. The upper cover plate has an air inlet pipe and an exhaust pipe that are the same as those inside the explosion container. The air inlet pipe is connected to a combustible gas storage tank, and the exhaust pipe is connected to a safety valve. Temperature sensors and pressure sensors are inserted into the cover. The explosion container is equipped with an electric spark ignition.

[0010] As a preferred technical solution of this utility model, the air inlet pipe is connected to the precision gas distribution module, and the bottom of the explosion container is provided with a drain port.

[0011] As a preferred technical solution of this utility model, the explosion module contains a temperature sensor, a pressure sensor, a temperature control device, and a mechanical stirring device.

[0012] As a preferred technical solution of this utility model, the explosion module is equipped with a temperature control device, and the temperature control device is equipped with a touch screen.

[0013] As a preferred technical solution of this utility model, the top of the explosion module and the cover are sealed by a flange connection. The explosion module is made of stainless steel. One end of the explosion module is sealed and connected to the stirring device, and the other end of the explosion module is sealed and connected to the cover by a flange connection.

[0014] As a preferred technical solution of this utility model, the precision gas distribution module is connected to the combustible gas storage pipe and the interior of the explosion module; the precision gas distribution module introduces gas into the explosion module through the air inlet pipe reserved on the explosion module.

[0015] As a preferred technical solution of this utility model, the explosion module 3 is equipped with a temperature sensor and a pressure sensor, and the pressure sensor and the temperature sensor are connected to the synchronous control and multi-channel data acquisition and processing module through a connecting line.

[0016] As a preferred embodiment of this invention, the temperature sensor is a thermocouple sensor and the pressure sensor is a piezoelectric sensor.

[0017] As a preferred technical solution of this utility model, an ignition electrode is provided inside the explosion module. The ignition electrode is connected to the main control module through a cable passing through the cover. The mechanical stirring device is provided with stirring blades. The stirring blades are connected to the rotating shaft. A sealing cover is provided in the middle of the rotating shaft. The sealing cover is located at the connection between the explosion container and the stirring device.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: In the solution of this utility model:

[0019] This invention enables the study of the explosion characteristics of combustible gases at different temperatures. It controls the temperature in the explosion container through a temperature control device, collects the pressure inside the explosion container in real time through a pressure sensor, and collects the temperature inside the explosion container through a temperature sensor to prevent the pressure and temperature from being too high or too low.

[0020] The explosion container is equipped with a mechanical stirring device that can achieve high-temperature stirring, which stirs the gas in the container, so that the gas in the container is fully mixed and evenly distributed, thereby improving the accuracy of the test.

[0021] A drain port is provided at the bottom of the explosion container to facilitate the cleaning of accumulated liquid and carbon deposits inside the container. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of the present invention;

[0023] Figure 2 A schematic diagram of the mechanical stirring device provided by this utility model.

[0024] The image shows:

[0025] 1. Precision gas distribution module; 2. Ignition module; 3. Explosion module; 4. Synchronous control and multi-channel data acquisition and processing module; 5. Temperature control module; 6. Main control module; 7. Monitoring module; 8. Mechanical stirring device; 801. Stirring blade; 802. Sealing gland; 803. Rotating shaft; 9. Explosion container. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0027] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments of this utility model and the features and technical solutions within them can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] Example 1: Please refer to Figures 1-2 A combustible gas explosion lower limit wide temperature detection device includes an explosion module 3, a main control module 6, a precision gas distribution module 1, a vacuum module, a temperature control module 5, a monitoring module 7, a mechanical stirring device 8, an ignition module 2, and a synchronous control and multi-channel data acquisition and processing module 4. The temperature control module 5, the monitoring module 7, the ignition module 2, and the synchronous control and multi-channel data acquisition and processing module 4 are inserted inside the explosion module 3. The mechanical stirring device 8 enters the container through a pre-reserved hole at the bottom of the explosion module 3. The temperature control module 5, the monitoring module 7, the ignition module 2, and the synchronous control and multi-channel data acquisition and processing module 4 are connected to the main control module 6 via connecting lines. The mechanical stirring device 8 is installed at the bottom of the explosion module 3.

[0029] The explosion module 3 is equipped with an explosion container 9. The top of the explosion container 9 is welded and sealed to the container delivery pipeline. The upper cover plate has the same air inlet pipe and exhaust pipe as the inside of the explosion container 9. The air inlet pipe is connected to the combustible gas storage tank, and the exhaust pipe is connected to the safety valve. Temperature sensors and pressure sensors are installed on the cover. The explosion container 9 is equipped with an electric spark ignition.

[0030] The air inlet pipe is connected to the precision gas distribution module 1, and the bottom of the explosion container 9 is equipped with a drain port. The explosion module 3 houses a temperature sensor, a pressure sensor, a temperature control device, and a mechanical stirring device 8.

[0031] The explosion module 3 is equipped with a temperature control device, which has a touch screen. The top of the explosion module 3 and the cover are sealed by a flange connection. The explosion module 3 is made of stainless steel. One end of the explosion module 3 is sealed and connected to the stirring device, and the other end of the explosion module 3 is sealed and connected to the cover by a flange connection.

[0032] The precision gas distribution module 1 is connected to the combustible gas storage pipe and the interior of the explosion module 3; the precision gas distribution module 1 introduces gas into the explosion module 3 through the gas inlet pipe reserved on the explosion module 3.

[0033] The explosion module 3 contains a temperature sensor and a pressure sensor, which are connected to the synchronization control and multi-channel data acquisition and processing module 4 via connecting cables. The temperature sensor is a thermocouple sensor, and the pressure sensor is a piezoelectric sensor.

[0034] An ignition electrode is provided inside the explosion module 3. The ignition electrode is connected to the main control module 6 via a cable passing through the cover. A stirring blade 801 is provided on the mechanical stirring device 8. The stirring blade 801 is connected to the rotating shaft 803. A sealing cover 802 is provided in the middle part of the rotating shaft 803. The sealing cover 802 is located at the connection between the explosion container 9 and the stirring device.

[0035] This utility model is a wide-temperature detection device for the lower limit of combustible gas explosion. It is used to test the explosion characteristics of combustible gas under different temperature conditions. The device includes an explosion module 3, a main control module 6, a precision gas distribution module 1, a vacuum module, a temperature control module 5, a monitoring module 7, a mechanical stirring device 8, an ignition module 2, and a synchronous control and multi-channel data acquisition and processing module 4.

[0036] The explosion module 3 is used as a container for testing the explosion characteristics of combustible gases; the main control module 6 is used for the overall control of the device, automatically controlling the temperature, evacuating the vacuum, automatically dispensing the multi-element gas sample into the explosion container 9 according to the set parameters, automatically setting the ignition time to 0-1 second, automatically collecting and displaying the maximum explosion pressure and explosion temperature, and automatically storing the data of this explosion experiment; the precision gas mixing module 1 is used to inject combustible gas, oxygen and air into the explosion module 3 to make the concentration and pressure inside the explosion module 3 meet the test requirements;

[0037] The vacuum module is used to evacuate the explosion module 3 before and after testing; the temperature control module 5 is used to maintain and monitor the temperature inside the explosion module 3 for conducting combustible gas explosion tests at different temperatures; the monitoring module 7 is used to monitor the actual situation of the explosion module 3; and the ignition module 2 is used to ignite the gas mixture inside the explosion module 3.

[0038] Temperature control module 5, monitoring module 7, ignition module 2, and synchronous control and multi-channel data acquisition and processing module 4 are inserted inside the explosion module 3; precision gas distribution module 1 and vacuum module are devices for the experimental gas to enter and clean the explosion module 3; mechanical stirring device 8 enters the container through the reserved hole at the bottom of the explosion module 3 and is used to stir the gas inside the explosion module 3 to achieve uniform mixing.

[0039] Temperature control module 5, monitoring module 7, ignition module 2, and synchronization control and multi-channel data acquisition and processing module 4 are connected to main control module 6 via connecting cables. A stirring device uses mechanical stirring to thoroughly mix the gas inside the explosion container 9. A live seal is used between the explosion container 9 and the stirring device to ensure internal airtightness.

[0040] Example 2: A wide-temperature detection device for the lower explosive limit of combustible gases, comprising a main control module 6, an explosion module 3, a precision gas distribution module 1, a vacuum module, a temperature control module 5, and a monitoring module 7. The explosion module 3 houses a temperature sensor, a pressure sensor, a temperature control device, and a mechanical stirring device 8. Temperature control within the explosion module 3 is achieved through the temperature control device, which is equipped with a touchscreen for touch control or remote control, to meet the requirements for determining the lower explosive limit of combustible gases at different temperatures. The top of the explosion module 3 and the cover are sealed using a flange connection. The explosion module 3 is made of stainless steel, with one end sealed and connected to the stirring device, and the other end sealed to the cover using a flange connection, ensuring good sealing performance.

[0041] The precision gas distribution module 1 is connected to the combustible gas storage pipe and the interior of the explosion module 3; the precision gas distribution module 1 introduces gas into the explosion module 3 through the gas inlet pipe reserved on the explosion module 3.

[0042] The explosion module 3 is also equipped with a temperature sensor and a pressure sensor. The pressure sensor and the temperature sensor are connected to the synchronous control and multi-channel data acquisition and processing module 4 via connecting wires. The temperature sensor is a thermocouple sensor, and the pressure sensor is a piezoelectric sensor.

[0043] An ignition electrode is provided inside the explosion module 3. The ignition electrode is connected to the main control module 6 through a cable passing through the cover to discharge and ignite the electric spark of the explosion gas. A mechanical stirring device 8 is installed at the bottom of the explosion module 3. The mechanical stirring device 8 can mix and stir the combustible gas inside the module to make the gas evenly distributed inside the module.

[0044] Example 3: A wide-temperature detection device for the lower explosion limit of combustible gases, comprising an explosion container 9: the explosion container 9 is made of stainless steel and has a volume of 1 liter. The top of the container is sealed to the top cover plate via a flange to ensure airtightness. The inlet pipe and the exhaust pipe are respectively installed on the top cover plate, each with a diameter of 2 cm.

[0045] Temperature control: The temperature control device is equipped with a touch screen for easy temperature setting and monitoring by operators. Thermocouple-type temperature sensors are used to monitor the temperature inside the container in real time.

[0046] Pressure monitoring: A piezoelectric pressure sensor is used, with a range of 0-2 MPa and an accuracy of ±0.01 MPa, to monitor pressure changes inside the container in real time. When the detected pressure exceeds a preset safety value, such as 1.5 MPa, the system automatically initiates the venting and pressure relief procedure.

[0047] Gas stirring: The mechanical stirring device 8 is located at the bottom of the container, and the stirring speed is adjustable from 50 to 500 rpm, currently set to 100 rpm. The stirring paddle is made of high-temperature resistant material to ensure normal operation in high-temperature environments.

[0048] Ignition System: The electric spark ignition device is installed in the center of the container and connected to an external power source via a high-voltage cable. The ignition energy is adjustable from 1 to 10 joules, currently set to 5 joules.

[0049] Gas mixing system: The gas mixing system can handle various gases including oxygen, nitrogen, air, carbon dioxide, and water vapor, simulating real combustion scenarios. The gas mixing ratio can be adjusted according to experimental needs; currently, it is set to 95% nitrogen + 5% combustible gas.

[0050] Safety measures: An emergency stop button is installed to immediately interrupt the experiment in case of any abnormality. All electrical equipment meets explosion-proof standards to ensure safety during the experiment.

[0051] Example 4: A wide-temperature detection device for the lower limit of combustible gas explosion, wherein the explosion container 9 is also made of stainless steel, and the top of the container is sealed to the upper cover plate by a flange connection to ensure airtightness.

[0052] Temperature control: Precise temperature measurement is achieved using a thermocouple-type temperature sensor. Pressure monitoring: A pressure sensor suitable for low-temperature environments is selected, with a range of 0-1 MPa and an accuracy of ±0.005 MPa. When the pressure is detected to be close to the safe limit, the system will automatically initiate a pressure relief procedure to prevent accidents.

[0053] Gas stirring: Mechanical stirring device 8 has been changed to a low-speed operation mode, with the adjustable stirring speed range reduced to 30-300 rpm, currently set at 80 rpm. The stirring paddle is made of low-temperature resistant material to prevent the material from becoming brittle or damaged due to low temperatures.

[0054] Ignition system: The position of the electric spark ignition device remains unchanged, but the ignition energy is adjusted to a lower level, such as 3 joules, to meet the ignition requirements under low-temperature conditions. High-voltage cables must be protected against freezing to ensure normal operation in low-temperature environments.

[0055] Gas distribution system: The gas distribution system can handle gases such as oxygen, nitrogen, air, carbon dioxide, and water vapor, simulating a real combustion scenario. A heating device must be installed in the intake pipe to prevent gas condensation and blockage.

[0056] Safety measures: In addition to the standard emergency stop button, a low-temperature alarm function should be added to promptly alert operators to take appropriate measures when the temperature falls below the set value. Ensure all electrical equipment can operate stably in low-temperature environments and conduct regular inspections and maintenance to prevent malfunctions.

[0057] This utility model relates to a device for testing the explosion characteristics of combustible gases at different temperatures. The device includes an explosion module 3, a main control module 6, a precision gas distribution module 1, a vacuum module, a temperature control module 5, a monitoring module 7, a mechanical stirring device 8, an ignition module 2, and a synchronous control and multi-channel data acquisition and processing module 4. Through the coordinated operation of these modules, the lower explosive limit of combustible gases at different temperatures can be determined.

[0058] Explosion Module 3: Serves as a container for testing the explosion characteristics of combustible gases. It is equipped with an explosion container 9, sealed at the top by a welded weld. The top cover has an inlet pipe and an outlet pipe, and the bottom has a drain port. Temperature sensors, pressure sensors, and an electric spark ignition device are installed inside. The temperature and pressure inside the explosion container 9 are monitored and regulated in real time by the temperature control device and sensors.

[0059] Main control module 6: As the overall control center of the device, it automatically performs operations such as temperature control, vacuuming, gas distribution, ignition, data acquisition and storage. It automatically controls the working status of other modules according to set parameters to ensure the smooth progress of the experiment.

[0060] Precision gas mixing module 1: Injects combustible gas, oxygen, and air into explosion module 3 to achieve the required concentration and pressure for the test. By connecting the combustible gas storage tank and explosion module 3, the flow rate and proportion of the gas are precisely controlled to ensure the uniformity of the mixed gas. The gas types that can be mixed include oxygen, nitrogen, air, carbon dioxide, water vapor, etc., simulating a real combustion scenario.

[0061] Vacuum Module: Explosion module 3 is evacuated before and after the experiment to ensure the purity of the experimental environment. A vacuum pump is used to evacuate the interior of explosion module 3 to remove residual gases.

[0062] Temperature control module 5: Maintains and monitors the temperature within the explosion module 3 for conducting combustible gas explosion tests at different temperatures. The temperature within the explosion container 9 is regulated by a temperature control device such as a heater or cooler, and can be set and monitored via a touchscreen or remote control.

[0063] Monitoring module 7 monitors the actual situation of explosion module 3 to ensure the safety and stability of the experiment. It observes the interior of explosion container 9 in real time via camera or other monitoring equipment and transmits the data to main control module 6.

[0064] The mechanical stirring device 8 stirs the gas inside the explosion module 3 to ensure uniform mixing. The mechanical stirring device 8 enters the container through a pre-drilled hole at the bottom and drives the stirring blades 801 to rotate via the rotating shaft 803, thereby achieving uniform gas distribution.

[0065] Ignition module 2 ignites the gas mixture within explosion module 3. The ignition electrode is connected to main control module 6 via a cable. When preset conditions are met, main control module 6 issues a command, and the ignition electrode generates an electric spark to ignite the gas mixture.

[0066] Synchronous Control and Multi-channel Data Acquisition and Processing Module 4: Synchronously controls the operation of each module and acquires and processes experimental data. It connects to devices such as temperature and pressure sensors via connecting cables to acquire, store, and analyze data in real time.

[0067] Workflow: Preparation Phase: The main control module 6 starts and checks whether each module is working properly. The precision gas mixing module 1 begins to fill the explosion container 9 with combustible gas, oxygen, and air to form a mixed gas of a specific concentration. The types of gases that can be mixed include oxygen, nitrogen, air, carbon dioxide, water vapor, etc., simulating a real combustion scenario. The temperature control module 5 adjusts the temperature inside the explosion container 9 to the set value.

[0068] Experimental Phase: Once the temperature and pressure reach the predetermined conditions, the main control module 6 issues an ignition command. The ignition electrode generates an electric spark, igniting the gas mixture. Temperature and pressure sensors monitor temperature and pressure changes in real time during the explosion process. The mechanical stirring device 8 operates continuously to ensure uniform gas distribution.

[0069] Data Acquisition and Analysis: The synchronous control and multi-channel data acquisition and processing module 4 collects experimental data. The main control module 6 records the maximum explosion pressure and explosion temperature, and stores the experimental data.

[0070] Cleanup phase: The vacuum module evacuates the explosion container 9 to remove residue. Preparation for the next experiment.

[0071] Safety Measures: Emergency Stop Button: Allows immediate interruption of the experiment in case of any abnormal situation. Safety Valve: Automatically releases pressure when it exceeds a preset value to prevent damage to the container. Explosion-proof Design: All electrical equipment meets explosion-proof standards to ensure the safety of the experimental process.

[0072] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A wide-temperature detection device for the lower explosion limit of combustible gases, characterized in that, The device includes a precision gas distribution module (1), an ignition module (2), an explosion module (3), a synchronization control and multi-channel data acquisition and processing module (4), a temperature control module (5), a main control module (6), a monitoring module (7), and a mechanical stirring device (8). The temperature control module (5), the monitoring module (7), the ignition module (2), and the synchronization control and multi-channel data acquisition and processing module (4) are inserted inside the explosion module (3). The mechanical stirring device (8) enters the container through a pre-reserved hole at the bottom of the explosion module (3). The temperature control module (5), the monitoring module (7), the ignition module (2), and the synchronization control and multi-channel data acquisition and processing module (4) are connected to the main control module (6) via connecting lines. The mechanical stirring device (8) is installed at the bottom of the explosion module (3).

2. The combustible gas explosion lower limit wide temperature detection device according to claim 1, characterized in that, The explosion module (3) is equipped with an explosion container (9). The top of the explosion container (9) is welded and sealed to the container delivery pipeline. The upper cover plate has an air inlet pipe and an exhaust pipe that are the same as those inside the explosion container (9). The air inlet pipe is connected to a combustible gas storage tank, and the exhaust pipe is connected to a safety valve. A temperature sensor and a pressure sensor are installed on the cover. The explosion container (9) is equipped with an electric spark ignition.

3. The combustible gas explosion lower limit wide temperature detection device according to claim 2, characterized in that, The air inlet pipe is connected to the precision gas distribution module (1), and the bottom of the explosion container (9) is provided with a drain port.

4. The combustible gas explosion lower limit wide temperature detection device according to claim 3, characterized in that, The explosion module (3) contains a temperature sensor, a pressure sensor, a temperature control device, and a mechanical stirring device (8).

5. A wide-temperature detection device for the lower explosion limit of combustible gas according to claim 4, characterized in that, The explosion module (3) is equipped with a temperature control device, and the temperature control device is equipped with a touch screen.

6. A wide-temperature detection device for the lower explosion limit of combustible gas according to claim 5, characterized in that, The top of the explosion module (3) and the cover are sealed by a flange connection. The explosion module (3) is made of stainless steel. One end of the explosion module (3) is sealed and connected to the stirring device, and the other end of the explosion module (3) is sealed and connected to the cover by a flange connection.

7. A wide-temperature detection device for the lower explosion limit of combustible gas according to claim 6, characterized in that, The precision gas distribution module (1) is connected to the combustible gas storage tank and the interior of the explosion module (3); the precision gas distribution module (1) introduces gas into the explosion module (3) through the gas inlet pipe reserved on the explosion module (3).

8. A wide-temperature detection device for the lower explosion limit of combustible gas according to claim 7, characterized in that, The explosion module (3) is equipped with a temperature sensor and a pressure sensor. The pressure sensor and the temperature sensor are connected to the synchronous control and multi-channel data acquisition and processing module (4) via connecting lines.

9. A wide-temperature detection device for the lower explosion limit of combustible gas according to claim 8, characterized in that, The temperature sensor is a thermocouple sensor, and the pressure sensor is a piezoelectric sensor.

10. A wide-temperature detection device for the lower explosion limit of combustible gas according to claim 9, characterized in that, An ignition electrode is provided inside the explosion module (3). The ignition electrode is connected to the main control module (6) through a cable passing through the cover. The mechanical stirring device (8) is provided with stirring blades (801). The stirring blades (801) are connected to the rotating shaft (803). A sealing cover (802) is provided in the middle part of the rotating shaft (803). The sealing cover (802) is located at the connection between the explosion container (9) and the stirring device.

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