An explosion-proof diesel engine tail gas safety detection device

Abstract

The application provides a safety detection device for tail gas of an explosion-proof diesel engine, which comprises a sleeve cabin, a gas mixing assembly and a detection assembly. The first end of the sleeve cabin is used for detachable connection with a tail gas exhaust pipe of the diesel engine. The gas mixing assembly comprises a gas mixing cabin and a gas mixing element. The gas mixing cabin is provided with a combustible gas inlet, an air inlet and a mixed gas outlet. The combustible gas inlet is used for inputting combustible gas, the air inlet is used for inputting air, and the mixed gas outlet is connected with the sleeve cabin. At least part of the gas mixing element is arranged in the gas mixing cabin, so as to mix the combustible gas and the air input into the gas mixing cabin. The detection assembly is connected with the sleeve cabin, so as to monitor the state change of the mixed gas in the sleeve cabin. The safety detection device for tail gas of the explosion-proof diesel engine has the advantages of convenient use and high safety.

Description

Technical Field

[0001] This invention relates to the technical field of exhaust manifold devices for explosion-proof diesel engines used in mining, and more specifically, to a safety detection device for exhaust gases from explosion-proof diesel engines. Background Technology

[0002] An explosion-proof diesel engine is a specially designed diesel engine that takes into account its safety when operating in environments that may produce flammable gases, vapors, or mists. It is widely used in potentially explosive environments such as underground coal mines.

[0003] The exhaust safety performance of explosion-proof diesel engines mainly involves testing their explosion-proof capabilities. In related technologies, safety testing of explosion-proof diesel engines is often conducted before assembly, which is not suitable for conveniently providing real-time safety testing for explosion-proof diesel engines in operation underground. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention provide an explosion-proof diesel engine exhaust gas safety detection device, which has the advantages of being easy to use and highly safe.

[0006] The explosion-proof diesel engine exhaust gas safety detection device according to an embodiment of the present invention includes:

[0007] A casing compartment, the first end of which is detachably connected to the exhaust pipe of a diesel engine;

[0008] A gas mixing assembly includes a gas mixing chamber and a gas mixing component. The gas mixing chamber has a combustible gas inlet, an air inlet, and a mixed gas outlet. The combustible gas inlet is used to introduce combustible gas, the air inlet is used to introduce air, and the mixed gas outlet is connected to the casing chamber. At least a portion of the gas mixing component is disposed within the gas mixing chamber for mixing the combustible gas and air introduced into the gas mixing chamber.

[0009] A detection component, connected to the casing chamber, is used to monitor changes in the state of the gas mixture within the casing chamber.

[0010] The explosion-proof diesel engine exhaust safety detection device of this invention can simulate the emission of diesel engine exhaust gas through a gas mixing component and monitor the changes in the state of the mixture in real time using a detection component, including parameters such as concentration and temperature, thereby promptly determining whether the diesel engine exhaust gas meets safety standards. Furthermore, through real-time monitoring, it can effectively prevent the risk of explosion caused by excessively high exhaust gas concentrations, ensuring the safety of personnel working underground.

[0011] In some embodiments, the gas mixing assembly further includes a partition plate disposed within the gas mixing chamber and dividing the gas mixing chamber into a mixing chamber and a delivery chamber, at least a portion of the gas mixing component being disposed within the mixing chamber, the delivery chamber being connected to a mixed gas outlet, and a through hole being provided on the partition plate, the through hole connecting the mixing chamber and the delivery chamber.

[0012] In some embodiments, there are multiple through holes, and the ratio of the projected area of ​​the multiple through holes on the partition to the area of ​​the partition is less than 1 / 3.

[0013] In some embodiments, the gas mixing assembly further includes a concentration detection element connected to the gas mixing chamber, with at least a portion of the concentration detection element disposed within the delivery chamber for detecting the concentration of the mixed gas within the delivery chamber.

[0014] In some embodiments, the casing includes a first section, a second section, and a third section connected in sequence. The first section is detachably connected to the exhaust pipe of the diesel engine. The radial dimensions of the second section and the third section are both smaller than the radial dimension of the first section, and the cross-sectional area of ​​the second section gradually decreases in the direction from the first section to the third section.

[0015] In some embodiments, the gas mixing assembly further includes a pressure reducing assembly, which includes a pressure reducing chamber and a delivery branch pipe. The pressure reducing chamber is connected to the mixed gas outlet, and the delivery branch pipe connects the pressure reducing chamber and the first compartment. There are multiple delivery branch pipes, which are arranged at intervals along the extension direction of the casing compartment.

[0016] In some embodiments, the gas mixing assembly further includes an exhaust nozzle, a first end of the delivery branch pipe is connected to the decompression chamber, a second end of the delivery branch pipe is connected to the first compartment, and the exhaust nozzle is connected to the second end of the delivery branch pipe and placed within the first compartment.

[0017] In some embodiments, there are multiple decompression assemblies, which are arranged at circumferential intervals along the casing.

[0018] In some embodiments, the detection assembly includes a temperature measuring element, an exhaust gas analyzer, and a flame detector, wherein the temperature measuring element, the exhaust gas analyzer, and the flame detector are arranged sequentially at intervals along the extension direction of the casing.

[0019] In some embodiments, the detection assembly further includes a noise detection element connected to the casing compartment for noise detection of the casing compartment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the explosion-proof diesel engine exhaust safety detection device according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the casing compartment of the explosion-proof diesel engine exhaust gas safety detection device according to an embodiment of the present invention.

[0022] Figure label:

[0023] 100. Exhaust pipe; 220. High-pressure combustible gas container; 300. Pressure reducing valve.

[0024] 1. Casing compartment; 11. First compartment; 12. Second compartment; 13. Third compartment.

[0025] 2. Gas mixing assembly; 21. Gas mixing chamber; 211. Mixing cavity; 212. Delivery cavity; 22. Gas mixing component; 23. Baffle; 24. Concentration detection component; 25. Pressure reducing assembly; 251. Pressure reducing chamber; 252. Delivery branch pipe; 26. Exhaust nozzle.

[0026] 31. Temperature measuring element; 311. Temperature tester; 312. Temperature test probe; 32. Exhaust gas analyzer; 321. Exhaust gas analysis sampling tube; 322. Exhaust gas analyzer; 33. Flame detector; 34. Flame sensor. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] like Figure 1 and Figure 2 As shown, the explosion-proof diesel engine exhaust safety detection device of this embodiment includes: a casing chamber 1, a gas mixing assembly 2, and a detection assembly.

[0029] The first end of the casing 1 is detachably connected to the exhaust pipe 100 of the diesel engine. The gas mixing assembly 2 includes a gas mixing chamber 21 and a gas mixing element 22. The gas mixing chamber 21 has a combustible gas inlet, an air inlet, and a mixed gas outlet. The combustible gas inlet is used to introduce combustible gas, the air inlet is used to introduce air, and the mixed gas outlet is connected to the casing 1. At least a portion of the gas mixing element 22 is placed within the gas mixing chamber 21 to mix the combustible gas and air introduced into the gas mixing chamber 21. A detection assembly is connected to the casing 1 to monitor changes in the state of the mixed gas within the casing 1.

[0030] Specifically, such as Figure 1As shown, the left end of the casing 1 is detachably connected to the diesel engine's exhaust pipe 100, facilitating disassembly, transportation, and the use of various diesel engine exhaust gas testing equipment. The combustible gas inlet can be connected to a high-pressure combustible gas supply device, allowing pressurized combustible gas to be introduced into the gas mixing chamber 21. Similarly, the air inlet can be connected to a high-pressure air pump, allowing high-pressure gas to be introduced into the gas mixing chamber 21, where a mixing component mixes the combustible gas and air in a specific ratio. After the mixed gas is introduced into the casing 1, detection components can monitor the temperature, concentration, flammability, and noise levels of the gas mixture, reflecting changes in its state from multiple perspectives.

[0031] It is understandable that the casing compartment 1 and the exhaust pipe can be connected by threaded connections, plug-in connections, or through connecting valves, so as to be compatible with the exhaust pipe 100 of existing explosion-proof diesel engines, with a wide range of applications and easy market promotion. It provides a space for mixing combustible gases and air, ensuring uniform mixing, so as to adapt to different combustible gases as needed, thereby meeting the requirements of simulating various gas environments downhole and ensuring detection accuracy.

[0032] It should be noted that, as Figure 1 As shown, the gas mixing component 22 can be a propeller-type agitator, meaning the agitator blades of the gas mixing component 22 are positioned on the left side of the gas mixing chamber 21 to ensure thorough mixing of the gas introduced into the gas mixing chamber 21 during startup. The high-pressure combustible gas supply device can be connected to the gas mixing chamber 21 via a gas pipe equipped with a pressure reducing valve 300 to control the gas pressure of the supply device. The high-pressure combustible gas container 220 can be a high-pressure sealed gas tank or cylinder to seal and contain the high-pressure combustible gas. The combustible gas can be any one of hydrogen, methane, ethane, propane, or alcohol in a high-pressure state, to simulate corresponding gas mixtures for different operating environments.

[0033] In other words, the explosion-proof diesel engine exhaust safety detection device of this invention can simulate the emission of diesel engine exhaust gas through the gas mixing component 2, and use the detection component to monitor the changes in the state of the mixture in real time, including parameters such as concentration and temperature, so as to determine in a timely manner whether the diesel engine exhaust gas meets safety standards. Furthermore, through real-time monitoring, it can effectively prevent the risk of explosion caused by excessively high exhaust gas concentration, ensuring the safety of personnel working underground.

[0034] In some embodiments, the gas mixing assembly 2 further includes a partition 23, which is placed inside the gas mixing chamber 21 and divides the gas mixing chamber 21 into a mixing chamber 211 and a delivery chamber 212. At least a portion of the gas mixing component 22 is placed inside the mixing chamber 211, and the delivery chamber 212 is connected to the mixed gas outlet. A through hole is provided on the partition 23, which connects the mixing chamber 211 and the delivery chamber 212.

[0035] Specifically, such as Figure 1 As shown, a partition 23 is placed inside the gas mixing chamber 21, dividing the gas mixing chamber 21 into two parts: a mixing chamber 211 located on the left side of the gas mixing chamber 21 and a conveying chamber 212 located on the right side of the gas mixing chamber 21. The agitator of the gas mixer 22 is placed inside the mixing chamber 211 to agitate the gas introduced into the mixing chamber 211, while the conveying chamber 212 is connected to the mixed gas outlet so that the mixed gas is introduced into the casing chamber 1 through the conveying chamber 212 and the mixed gas outlet. The partition 23 has through holes that connect the mixing chamber 211 and the conveying chamber 212 so that the mixed gas in the mixing chamber 211 can be introduced into the conveying chamber 212.

[0036] It is understood that both the combustible gas and air introduced into the mixing chamber 211 are high-pressure gases. Therefore, the gas flow pattern within the gas mixing chamber 21 is from the mixing chamber 211 to the delivery chamber 212, thus preventing gas backflow. Furthermore, the partition 23 divides the gas mixing chamber 21 into two parts, which helps to better control the mixing process of the combustible gas and air. In the mixing chamber 211, the gas mixer 22 can more effectively promote gas mixing because the mixing chamber 211 has a smaller volume and the mixing process is more concentrated. The through-hole design on the partition 23 helps the mixed gas flow evenly and smoothly into the delivery chamber 212, reducing turbulence and flow dead zones, thereby improving the uniformity of the mixed gas.

[0037] Preferably, there are multiple through holes, and the ratio of the projected area of ​​the multiple through holes on the partition 23 to the area of ​​the partition 23 is less than 1 / 3. It is understood that the multiple through holes can be evenly distributed on the partition 23. The design of multiple through holes helps the gas to form a more uniform flow when passing through the partition 23, reducing the problems of uneven gas flow rate and uneven mixing caused by a single large hole.

[0038] The total projected area of ​​the through holes (i.e., the sum of the areas of all through holes on the partition 23) is small compared to the total area of ​​the partition 23, specifically less than 1 / 3. This allows for effective control of the flow rate of the mixed gas by limiting the area of ​​the through holes, preventing incomplete mixing due to excessive flow rate. Furthermore, due to the small through hole area, the gas resides in the mixing chamber 211 for a relatively longer time, providing more mixing time and thus improving mixing efficiency. The small area of ​​the through holes also helps reduce the possibility of gas backflow into the mixing chamber 211 after mixing, maintaining the stability of the mixing process.

[0039] In some embodiments, the gas mixing assembly 2 further includes a concentration detection element 24, which is connected to the gas mixing chamber 21 and at least a portion of the concentration detection element 24 is placed in the delivery chamber 212 for detecting the concentration of the mixed gas in the delivery chamber 212.

[0040] It is understandable that, such as Figure 1 As shown, the gas mixing chamber 21 can be connected to the casing chamber 1 through a pipeline, and the concentration detection element 24 can extract part of the mixed gas in the delivery chamber 212 so as to detect the concentration of the mixed gas in real time.

[0041] In other words, the installation of the concentration detection element 24 enables the system to monitor the concentration of the mixed gas in the delivery chamber 212 in real time, ensuring the safety of the mixed gas. The concentration detection element 24 can accurately measure the concentration of combustible gas in the mixed gas, thereby providing more accurate exhaust gas safety performance data.

[0042] In some embodiments, such as Figure 1 and Figure 2 The casing 1 shown includes a first section 11, a second section 12 and a third section 13 connected in sequence. The first section 11 is detachably connected to the exhaust pipe 100 of the diesel engine. The radial dimensions of the second section 12 and the third section 13 are both smaller than the radial dimension of the first section 11. In the direction from the first section 11 to the third section 13, the cross-sectional area of ​​the second section 12 gradually decreases.

[0043] It is understandable that, such as Figure 2 As shown, the first section 11, the second section 12, and the third section 13 are connected sequentially from left to right. The second section 12 connects the first section 11 and the third section 13, and the longitudinal cross-sectional area of ​​the second section 12 gradually decreases from left to right.

[0044] In other words, as the cross-sectional area of ​​the second section 12 decreases, the flow velocity of the exhaust gas gradually increases, which helps to reduce turbulence and dead zones, thereby improving flow stability.

[0045] In some embodiments, the gas mixing assembly 2 further includes a pressure reducing assembly 25, which includes a pressure reducing chamber 251 and a delivery branch pipe 252. The pressure reducing chamber 251 is connected to the mixed gas outlet, and the delivery branch pipe 252 connects the pressure reducing chamber 251 and the first compartment 11. There are multiple delivery branch pipes 252, and these multiple delivery branch pipes 252 extend along the extension direction of the casing compartment 1 (e.g., ...). Figure 2 Arranged at intervals in the left and right directions.

[0046] It is understandable that, such as Figure 1 As shown, the depressurization chamber 251 is connected to the mixed gas outlet via a pipeline, and a pressure reducing valve 300 is installed on the pipeline near the mixed gas outlet to reduce the pressure of the mixed gas, thereby ensuring that the mixed gas is in a stable state before entering the casing chamber 1. Multiple delivery branches 252 connect the depressurization chamber 251 to the first section 11, so that the mixed gas enters the casing chamber 1 through the multiple delivery branches 252.

[0047] In other words, the depressurization chamber 251 can regulate the pressure of the mixed gas, preventing damage to the detection components or affecting the detection accuracy due to excessively high mixed gas pressure. The arrangement of multiple delivery branches 252 helps to evenly distribute the exhaust gas entering from the first section 11, ensuring its uniform distribution within the depressurization chamber 251 and improving the detection effect.

[0048] In some embodiments, the gas mixing assembly 2 further includes an exhaust nozzle 26, a first end of a delivery branch pipe 252 connected to a decompression chamber 251, a second end of a delivery branch pipe 252 connected to a first compartment 11, and the exhaust nozzle 26 connected to the second end of the delivery branch pipe 252 and placed inside the first compartment 11.

[0049] Understandably, the main function of the exhaust nozzle 26 is to introduce the mixed gas from the decompression chamber 251 into the first section 11 via injection, facilitating more efficient mixing of the exhaust gas and air in the mixing chamber 211. The exhaust nozzle 26 is typically designed to disperse the airflow into multiple smaller streams, increasing the surface area of ​​the airflow and thus promoting mixing with the air within the mixing chamber 211. In other words, through the injection action of the exhaust nozzle 26, the exhaust gas can mix with air more quickly, improving mixing efficiency and ensuring that the combustible components and air in the mixed gas reach the optimal mixing ratio, thereby benefiting the detection of the detection components.

[0050] Optionally, such as Figure 1 As shown, there are multiple pressure-reducing assemblies 25, which are arranged at intervals along the circumference of the casing compartment 1. It is understood that arranging multiple pressure-reducing assemblies 25 according to actual operating conditions helps to evenly disperse and reduce exhaust gas pressure, ensuring uniform pressure and flow conditions of the exhaust gas throughout the casing compartment 1. Furthermore, by increasing the number of pressure-reducing assemblies 25, larger flow rates of exhaust gas can be handled to meet the emission requirements of large or multiple diesel engines.

[0051] In some embodiments, the detection assembly includes a temperature measuring element 31, an exhaust gas analyzer 32, and a flame detector 33, which are arranged sequentially at intervals along the extension direction of the casing compartment 1.

[0052] It is understood that the temperature measuring device 31 includes a temperature tester 311 and a temperature test probe 312, the exhaust gas analyzer 32 includes an exhaust gas analysis sampling tube 321 and an exhaust gas analyzer 322, and the flame detector 33 is connected to a flame sensor 34.

[0053] like Figure 1 As shown, a temperature test probe 312 is provided in the middle of the inner wall of the casing compartment 1, and a temperature tester 311 is connected to the temperature test probe 312; an exhaust gas analysis sampling tube 321 is provided at the tail of the first compartment 11, and an exhaust gas analyzer 322 is adapted to the exhaust gas analysis sampling tube 321 to detect the SCR exhaust gas purification efficiency; a flame sensor 34 is provided between the temperature test probe 312 and the exhaust gas analysis sampling tube 321 in the casing compartment 1, and a flame sensor 34 is adapted to a flame detector 33 to detect the temperature of the simulated gas igniting the exhaust port; when it is necessary to conduct exhaust gas safety testing of the explosion-proof diesel engine, the casing compartment 1 can be connected to the exhaust pipe 100 of the explosion-proof diesel engine for operation. It is very convenient to use and can provide convenient real-time safety testing for the explosion-proof diesel engine on duty underground. The structure is intuitive and highly compatible with the existing exhaust pipe 100 of the explosion-proof diesel engine.

[0054] The exhaust gas analyzer 322 is an instrument used to measure the components of vehicle exhaust gases and the smoke opacity of diesel vehicle emissions. It is simple to operate, powerful in function, requires no other auxiliary equipment, and has an error rate of only 5%. The device includes a main unit, a measuring unit, a standard gas, a filter, a sampling probe, and other accessories. It can also be equipped with a speed sensor, an oil temperature sensor, etc. In this embodiment, the exhaust gas analyzer 32 can be a five-gas analyzer, etc. The flame detector 33 can be an explosion-proof flame detector 33. The exhaust gas analysis sampling tube 321 is a negative pressure suction tube, which is a standard component used with the exhaust gas analyzer 322.

[0055] In some embodiments, the detection assembly further includes a noise detection element (not shown) connected to the casing 1 for noise detection of the casing 1.

[0056] Understandably, the noise detection device is connected to the casing compartment 1 and is typically positioned to easily capture noise within the compartment. The noise detection device can measure the noise level and frequency characteristics within the casing compartment 1, aiding in the analysis of the diesel engine's operating status. The real-time monitoring function of the noise detection device allows operators to promptly understand the diesel engine's operating condition and detect abnormal sounds, such as knocking or friction noises, which may be early signs of mechanical failure. Therefore, by analyzing noise data, potential faults can be predicted, allowing for proactive maintenance and preventing serious mechanical damage.

[0057] In summary, the explosion-proof diesel engine exhaust gas safety detection device of this embodiment uses high-purity compressed combustible gas, such as methane, in the detection process. After depressurization, it is sent into the gas mixing chamber 21. The gas mixing component 22 mixes the combustible gas with air to achieve and control the concentration at 9.5%, and then depressurizes it again before sending it into the depressurization chamber 251. It is then sent to the exhaust nozzle 26 through the delivery branch pipe 252, reaching the concentration required for gas explosion in the casing chamber 1. When the high-temperature exhaust gas discharged from the explosion-proof diesel engine enters the casing chamber 1, it can be safely detected as needed.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A safety detection device for explosion-proof diesel engine exhaust gas, characterized in that, include: A casing compartment, the first end of which is detachably connected to the exhaust pipe of a diesel engine, the casing compartment comprising a first compartment, a second compartment and a third compartment connected in sequence; A gas mixing assembly includes a gas mixing chamber and a gas mixing component. The gas mixing chamber has a combustible gas inlet, an air inlet, and a mixed gas outlet. The combustible gas inlet is used to introduce combustible gas, the air inlet is used to introduce air, and the mixed gas outlet is connected to the casing chamber. At least a portion of the gas mixing component is disposed within the gas mixing chamber for mixing the combustible gas and air introduced into the gas mixing chamber. A detection component, connected to the casing chamber, is used to monitor changes in the state of the gas mixture within the casing chamber. The gas mixing assembly further includes a pressure reducing assembly, which includes a pressure reducing chamber and a delivery branch pipe. The pressure reducing chamber is connected to the mixed gas outlet, and the delivery branch pipe connects the pressure reducing chamber and the first compartment. There are multiple delivery branch pipes, which are arranged at intervals along the extension direction of the casing compartment. The gas mixing assembly also includes an exhaust nozzle. The first end of the delivery branch pipe is connected to the pressure reducing chamber, and the second end of the delivery branch pipe is connected to the first compartment. The exhaust nozzle is connected to the second end of the delivery branch pipe and is placed inside the first compartment. There are multiple pressure reducing assemblies, which are arranged at intervals along the circumference of the casing compartment.

2. The explosion-proof diesel engine exhaust gas safety detection device according to claim 1, characterized in that, The gas mixing assembly further includes a partition plate, which is placed inside the gas mixing chamber and divides the gas mixing chamber into a mixing chamber and a delivery chamber. At least a portion of the gas mixing component is placed inside the mixing chamber. The delivery chamber is connected to the mixed gas outlet. The partition plate has a through hole that connects the mixing chamber and the delivery chamber.

3. The explosion-proof diesel engine exhaust gas safety detection device according to claim 2, characterized in that, There are multiple through holes, and the ratio of the projected area of ​​the multiple through holes on the partition to the area of ​​the partition is less than 1 / 3.

4. The explosion-proof diesel engine exhaust safety detection device according to claim 3, characterized in that, The gas mixing assembly further includes a concentration detection element connected to the gas mixing chamber, with at least a portion of the concentration detection element placed inside the delivery chamber for detecting the concentration of the mixed gas inside the delivery chamber.

5. The explosion-proof diesel engine exhaust safety detection device according to claim 4, characterized in that, The first compartment is detachably connected to the exhaust pipe of the diesel engine. The radial dimensions of the second compartment and the third compartment are both smaller than the radial dimension of the first compartment. In the direction from the first compartment to the third compartment, the cross-sectional area of ​​the second compartment gradually decreases.

6. The explosion-proof diesel engine exhaust safety detection device according to any one of claims 1-5, characterized in that, The detection assembly includes a temperature measuring element, an exhaust gas analyzer, and a flame detector, which are arranged sequentially at intervals along the extension direction of the casing.

7. The explosion-proof diesel engine exhaust gas safety detection device according to claim 6, characterized in that, The detection assembly also includes a noise detection element connected to the casing compartment for noise detection of the casing compartment.

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