Weak confinement gas-dust explosion test device

Abstract

The utility model discloses a weak confinement gas-dust explosion test device. The device comprises a main body part, the main body part comprises a disc base, a cylindrical air bag and a powder spraying device, and is further provided with an ignition system, an air distribution system and a data acquisition system. The ignition system comprises a DHY-6 ignition delay device, a high-voltage wire and an ignition head. The gas distribution system comprises a combustible gas bottle, an air bottle, a 0.3 m < 3 > pressure-resistant gas storage tank, a pressure reducing valve, a precision pressure gauge, a vacuum pressure gauge, a vacuum pump, a one-way ball valve, a quick connector, a gas pipe, an electromagnetic valve and two 15L pressure-resistant containers; the data acquisition system comprises a sensor, a data acquisition unit, a data acquisition computer, a high-speed camera, a high-speed camera computer, an infrared thermal imager, an infrared thermal imager computer and an unmanned aerial vehicle. According to the utility model, the problems of gas distribution and dust dispersion of combustible gas in a freely limited space are solved, and gas or dust explosion tests under various weak constraint working conditions of different flame propagation distances, different ignition positions, different dust and gas concentrations and the like can be carried out.

Description

Technical Field

[0001] The utility model relates to the fields of combustible gas storage safety technology and dust production safety technology, in particular to a weakly restrained gas-dust explosion test device. Background Art

[0002] Explosions of gases, dusts, and gas-dust mixtures are a common and hazardous phenomenon in industrial production. Industries like petrochemicals, chemicals, and powder handling often experience the coexistence of large quantities of gases and dusts. Understanding the explosion characteristics of various combustible gases, dusts, and their mixtures in free, unconfined spaces, including their concentrations, explosion temperatures, and explosion propagation, is crucial to ensuring industrial safety.

[0003] Some gas detection methods may be sensitive to multiple gases and lack specificity, making it difficult to accurately distinguish gas types in complex environments. The sensitivity of some sensors is significantly affected by the environment and has relatively long response times. Dust concentration detection technologies can also affect measurement accuracy due to varying sensitivity to particle size distribution, and are significantly affected by impurities and humidity, resulting in less than ideal response times. In real industrial environments, gas or dust explosions often occur due to various factors, resulting in serious consequences.

[0004] Many researchers have focused on gas-dust explosion testing in confined spaces and have gained a thorough understanding of the explosion mechanisms of pure gases and dust. However, these previous studies are not fully applicable to most actual production, storage, and operational environments. Gas leaks and dust suspensions often occur in unconfined spaces, and potential accidents arise when local flammable concentrations are reached. To understand the explosion characteristics of gases, dusts, and gas-dust mixtures in unconfined spaces and to address the distribution of gas and dust cloud concentrations in unconfined spaces, a weakly confined gas-dust explosion test apparatus is urgently needed. Utility Model Content

[0005] The purpose of this utility model is to provide a gas-dust explosion test platform with a weak restraint device, using various combustible gas fuels and combustible dust particles as research media to conduct a series of weak restraint explosion test studies on combustible gases and combustible dust under different working conditions such as different concentrations, different mixtures, and different flame propagation distances, so as to reveal the changing mechanism and propagation law of the explosion pressure of combustible gases and combustible dust in the context of real industrial applications, and provide data support for constructing theoretical calculation models and numerical simulations of gas-dust explosion propagation characteristics and explosion pressure in unconfined spaces.

[0006] In order to solve the above technical problems, the utility model overcomes the concentration distribution problem of combustible gas and combustible dust in an unconfined space and can carry out combustion and explosion tests of combustible gas and combustible dust mixtures in an unconfined space, determines the instruments and equipment and operation methods for explosion tests in unconfined spaces, and designs a test device suitable for gas-dust explosion tests under weak restraint devices.

[0007] A weakly confined gas-dust explosion test device, including a disc base, a cylindrical air bag, a powder spraying device, a 0.3m 3 Pressure gas storage tank, 15L air pressure container, 15L combustible gas pressure container, DHY-6 ignition delay device, air cylinder, combustible gas cylinder, air pipe, ball valve, quick connector, one-way ball valve, ignition head, electrode rod, solenoid valve, high-voltage wire, vacuum gauge, precision pressure gauge, sensor, sensor base.

[0008] The main part is

[0009] Disc base, cylindrical air bag and powder spraying device;

[0010] There are eight threaded ports on the disc base. The four outer threaded ports are connected to the air pipe through a one-way ball valve and a quick connector for gas distribution, and the four inner threaded ports are connected to the electrode base.

[0011] The powder spraying device is connected to the disc base through an air pipe and placed in the cylindrical air bag;

[0012] The cylindrical air bag is connected to the protruding circular ring portion on the surface of the disc base through a silicone gasket and a clamp;

[0013] It also includes an ignition system, including a DHY-6 ignition delay device, a high-voltage wire, an electrode base, an electrode rod and an ignition head. The electrode base is connected to the disc base, and the electrode rod passes through the disc base through the electrode base thread. The electrode rod on the flat surface of the disc base is connected to the delay ignition device through the high-voltage wire, and the disc base is connected to the ignition head on one side of the cylindrical air bag.

[0014] It also includes a data acquisition system, sensors, sensor bases, radio frequency cables, data collectors, data acquisition computers, high-speed cameras, high-speed camera computers, infrared thermal imagers, infrared thermal imager computers and drones. The sensors are placed directly below the cylindrical air bag, and the high-speed camera and infrared thermal imager are placed on the side and perpendicular to the cylindrical air bag.

[0015] It also includes a test gas distribution system, which includes a 15L pressure container, a 0.3m 3 Pressure-resistant gas storage tanks, flammable gas cylinders, air cylinders, solenoid valves and gas pipes.

[0016] Furthermore, the disc base is a 304 alloy steel non-welded disc base with an overall diameter of 1000mm, a wall thickness of 100mm, a protruding ring diameter of 280mm and a wall thickness of 150mm; there are a total of 8 threaded holes, 4 of which are quarter-threaded holes in the outer ring and 4 are M20*1.5 threaded holes in the inner ring.

[0017] Furthermore, the cylindrical air bag is made of polyethylene (PE) plastic, and its size is customized according to the experimental requirements. The cylindrical air bag used in the verified test has a diameter of 300 mm and a height of 5000 mm.

[0018] Furthermore, the powder spraying device consists of a stainless steel cylindrical container with an inner diameter of 50 mm, a height of 500 mm, a wall thickness of 10 mm, M60*1.5 external threads on both ends and a 4-point threaded hole in the center of the bottom, a quick connector, a dispersion piece and a porous nozzle with M60*1.5 internal threads. Except for the dispersion piece, the other components are fixed by threads. The dust is filled in the stainless steel cylindrical container, connected to the air pipe and placed inside the cylindrical air bag. It is only used in dust tests.

[0019] Furthermore, the ignition head is divided into a bare ignition head or a powder-filled ignition head, and the detonation energy is changed by the amount of powder. When the gas is hydrogen, the resistance wire can be replaced.

[0020] Furthermore, the DHY-6 ignition delay device is used in conjunction with the solenoid valve, air pipe, and powder spraying device. It can set the powder spraying time and ignition time to achieve ignition when the dust cloud reaches the desired concentration. This device is only used in dust tests, while the powder spraying time is set to the smallest unit of 0.01ms in gas tests. The DHY-6 ignition delay device is connected to the solenoid valve, air pipe, and powder spraying device accordingly. When activated, the powder spraying time and ignition time can be set to achieve ignition when the dust cloud reaches the desired concentration.

[0021] Furthermore, 15L air pressure container, 15L combustible gas pressure container and 0.3m 3 The pressure gas storage tanks are made of Q345R carbon steel and can withstand pressures of 1.35MPa, 1.35MPa and 1MPa respectively. A self-assembled gas container is formed by installing a vacuum gauge, a precision pressure gauge, a one-way ball valve and a quick connector. At the same time, raw tape is wrapped around the joints of each component and silicone rubber is applied to ensure sealing. The pressures during use are 0.6MPa, 0.5MPa and 0.6MPa respectively. The 15L air pressure container and the 15L combustible gas pressure container use the partial pressure method to distribute gas to ensure the gas concentration in the cylindrical air bag, and the 0.3m 3 The pressure-resistant gas storage tank is connected to the air bottle to ensure that the powder spraying pressure is maintained at 0.6Mpa.

[0022] Furthermore, the sensor base is composed of a stainless steel base cover, bolt holes and wire holes. The radio frequency cable is connected to the data collector and the sensor through the wire holes. When in use, it is buried underground with the sensor base, and the surface of the sensor base is flush with the ground surface.

[0023] Furthermore, when the 8 threaded holes on the disc base are idle, they need to be connected to ball valves to ensure their air tightness. When installing the ball valve, it needs to be wrapped with raw tape and coated with silicone rubber. After the quick connector installed on the flat surface of the disc base is connected to the air pipe, a one-way ball valve needs to be installed 5 cm away. When conducting a dust test, an air pipe must be equipped with an additional solenoid valve 5 cm away from the disc base to ensure sufficient powder spraying pressure.

[0024] Furthermore, the sensor includes a temperature sensor and a pressure sensor.

[0025] Compared with the prior art, the present invention has the following significant advantages:

[0026] (1) The experimental device can carry out explosion tests on combustible gas, combustible dust and gas-dust mixture under weak confinement conditions.

[0027] (2) This device can directly record the temperature changes during the combustion and explosion process through an infrared thermal imager and can observe the complete flame propagation process through a high-speed camera.

[0028] (3) This device can carry out tests of different scales and working conditions and has a certain degree of flexibility.

[0029] (4) The air intake system of this device can take in air from a distance of 100 meters, which can not only ensure the air intake efficiency and accuracy, but also has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the weakly confined gas-dust explosion test device.

[0031] Figure 2 This is an example diagram of a sensor base.

[0032] Figure 3 This is the front view of the disc base.

[0033] Figure 4 It is a side view of the disc base.

[0034] Figure 5 It is a schematic diagram of the structure of the powder spraying device.

[0035] In the figure, the disc base (1), the cylindrical air bag (2), the powder spraying device (3), the 0.3m 3Pressure-resistant gas storage tank (4), 15L air pressure-resistant container (5), 15L combustible gas pressure-resistant container (6), vacuum pump (7), DHY-6 ignition delay device (8), air bottle (9), combustible gas bottle (10), air pipe (11), ball valve (12), quick connector (13), one-way ball valve (14), ignition head (15), electrode rod (16), solenoid valve (17), high-voltage wire (18), vacuum gauge (19), precision pressure gauge (20), sensor (21), sensor Base (22), data collector (23), data acquisition computer (24), infrared thermal imager computer (25), high-speed camera computer (26), infrared thermal imager (27), radio frequency cable (28), high-speed camera (29), drone (30), threaded hole (31), threading hole (32), base cover (33), clamp (34), silicone gasket (35), electrode base (36), dispersion tablet (37), porous nozzle (38) and stainless steel cylindrical container (39). DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to specific embodiments.

[0037] The utility model provides a weakly restrained gas-dust explosion test device, comprising

[0038] Main body;

[0039] The main part is a disc base 1, a cylindrical air bag 2 and a powder spraying device 3;

[0040] The disc base 1 is provided with eight threaded openings. The four outer threaded openings are connected to the air pipe 11 through a one-way ball valve 14 and a quick connector 13 for gas distribution, and the four inner threaded openings are connected to the electrode base 36.

[0041] The powder spraying device 3 is connected to the disc base 1 through the air pipe 11 and is placed in the cylindrical air bag 2;

[0042] The cylindrical air bag 2 is connected to the protruding circular portion of the disc base 1 through a silicone gasket 33 and a clamp 34;

[0043] It also includes an ignition system, including a DHY-6 ignition delay device 8, a high-voltage wire 18, an electrode base 36, an electrode rod 16 and an ignition head 15. The electrode base 36 is connected to the disc base 1, and the electrode rod 16 passes through the disc base 1 through the electrode base 36 thread. The electrode rod 16 on the flat surface of the disc base 1 is connected to the delay ignition device 8 through the high-voltage wire 18. The disc base 1 is connected to the ignition head 15 on one side of the cylindrical air bag 2.

[0044] The system also includes a data acquisition system, a sensor 21, a sensor base 22, a radio frequency cable 28, a data collector 23, a data acquisition computer 24, a high-speed camera 29, a high-speed camera computer 26, an infrared thermal imager 27, an infrared thermal imager computer 25, and a drone 30. The sensor 21 is placed directly below the cylindrical airbag 2, and the high-speed camera 29 and the infrared thermal imager 27 are placed on the side and perpendicular to the cylindrical airbag 2.

[0045] The test gas distribution system includes a 15L air pressure container 5, a 15L combustible gas pressure container 6, a 0.3m3 pressure gas storage tank 4, a combustible gas cylinder 10, an air cylinder 9, a solenoid valve 17 and a gas pipe 11;

[0046] The 15L air pressure container 5 and the 15L combustible gas pressure container 6 are equipped with a vacuum gauge 19, a precision pressure gauge 20, a one-way ball valve 14 and a quick connector 13, and are connected to the vacuum pump 7 through the air pipe 11. After vacuuming, they are connected to the air cylinder 9 and the combustible gas cylinder 10 respectively.

[0047] 0.3m 3 The pressure-resistant gas storage tank 4 is connected to the electromagnetic valve 17 through the air pipe 11 and the ball valve 12 , and the other end of the electromagnetic valve 17 is connected to the disc base 1 and the powder spraying device 3 .

[0048] In addition, the disc base 1 is a non-welded disc-type base made of 304 alloy steel with an overall diameter of 1000mm and a wall thickness of 100mm. The diameter of the protruding ring is 280mm and the wall thickness is 150mm. There are a total of 8 threaded holes, 4 of which are quarter-threaded holes in the outer circle and 4 are M20*1.5 threaded holes in the inner circle. The protruding disc part is connected and fixed to the clamp 34 and the cylindrical air bag 2 through a silicone gasket 35.

[0049] The powder spraying device 3 consists of a stainless steel cylindrical container 39 with an inner diameter of 50 mm, a height of 500 mm, and a wall thickness of 10 mm. The container has M60*1.5 external threads on both ends and a four-threaded hole in the center of the bottom. The quick connector 13, a dispersion piece 37, and a porous nozzle 38 with M60*1.5 internal threads are installed. Except for the dispersion piece 37, the remaining components are fixed together by threads and connected to the air pipe 11. They are placed inside the cylindrical air bag 2.

[0050] The cylindrical air bag 2 is made of polyethylene PE plastic, and its size is customized according to the experimental requirements. The cylindrical air bag 2 used in the verified test has a diameter of 300 mm and a height of 5000 mm.

[0051] The solenoid valve 17 is connected to the DHY-6 ignition delay device 8 through a high-voltage line 18. The solenoid valve 17 is in a normally closed state. When the DHY-6 ignition delay device 8 is turned on, the solenoid valve 17 opens, and the opening time is controlled by the powder spraying time in the DHY-6 ignition delay device 8.

[0052] The sensor base 22 is made of stainless steel and consists of a base cover 33, bolt holes 31 and wire holes 32. The RF cable 28 connects the data collector 23 and the sensor 21 through the wire hole 32. When in use, it is buried underground with the sensor base 22. When in use, it needs to be buried underground, and the surface of the sensor base 22 is flush with the ground surface.

[0053] The utility model is a more specific weakly restrained gas-dust explosion test device, comprising a disc base 1, a cylindrical air bag 2, a powder spraying device 3, a 0.3m 3 Pressure-resistant gas storage tank 4, 15L air pressure container 5, 15L combustible gas pressure container 6, vacuum pump 7, DHY-6 ignition delay device 8, air cylinder 9, combustible gas cylinder 10, air pipe 11, ball valve 12, quick connector 13, one-way ball valve 14, ignition head 15, electrode rod 16, solenoid valve 17, high-voltage wire 18, vacuum gauge 19, precision pressure gauge 20, sensor 21, sensor base 22, data collector 23, data acquisition computer 24, infrared thermal imager computer 25, high-speed camera computer 26, infrared thermal imager 27, radio frequency cable 28, high-speed camera 29, drone 30, threaded hole 31, threading hole 32, base cover 33, clamp 34, silicone gasket 35, electrode base 36, dispersion sheet 37, porous nozzle 38 and stainless steel cylindrical container 39;

[0054] The disc base 1 is a non-welded disc-shaped base made of 304 alloy steel with an overall diameter of 1000mm and a wall thickness of 100mm. The diameter of the protruding ring is 280mm and the wall thickness is 150mm. There are a total of 8 threaded holes, 4 of which are quarter-threaded holes in the outer ring and 4 are M20*1.5 threaded holes in the inner ring. The protruding disc part is connected and fixed to the cylindrical air bag 2 through a silicone gasket 35 and a clamp 34.

[0055] The powder spraying device 3 consists of a stainless steel cylindrical container 39 with an inner diameter of 50 mm, a height of 500 mm, a wall thickness of 10 mm, M60*1.5 external threads on both ends, and a 4-point threaded hole in the center of the bottom, a quick connector 13, a dispersion piece 37, and a porous nozzle 38 with M60*1.5 internal threads. Except for the dispersion piece 37, the remaining components are fixed by threads. After the stainless steel cylindrical container 39 is filled with dust and assembled, it is connected to the air pipe 11 and placed inside the cylindrical air bag 2.

[0056] The ignition head 15, the high-voltage wire 18, the DHY-6 ignition delay device 8, the electrode rod 16 and the electrode base 36 constitute the ignition system. The ignition head 15 is connected to the electrode rod 16 before the cylindrical airbag 2 is fixed. During the connection process, the high-voltage wire 18 at the other end remains in a short-circuited state and is firmly connected to the two electrode rods 16.

[0057] 0.3m 3The pressure-resistant gas storage tank 4 is connected to the air bottle 9, the ball valve 12 and the electromagnetic valve 17 through the air pipe 11. The other end of the electromagnetic valve 17 is connected to the disc base 1 and the powder spraying device 3. The electromagnetic valve 17 remains closed, and the pressure reducing valve of the air bottle 9 is maintained at 0.6Mpa and 0.3m as much as possible. 3 The air pressure between the pressure-resistant gas tank and the solenoid valve 17 is 0.6Mpa, and the solenoid valve 17 is 15cm away from the disc base. If the solenoid valve 17 is too far away from the disc base 1, the powder spraying pressure will be much less than 0.6Mpa, affecting the powder spraying effect.

[0058] The 15L air pressure container 5 and the 15L combustible gas pressure container 6 are equipped with a vacuum gauge 19, a precision pressure gauge 20, a one-way ball valve 14 and a quick connector 13. They are connected to the vacuum pump 7 through the air pipe 11. After vacuuming, they are connected to the air cylinder 9 and the combustible gas cylinder 10 respectively. The partial pressure method is used to control the combustible gas concentration by observing the changes in the readings of the precision pressure gauge 20.

[0059] The sensor base 22, consisting of a base cover 33, bolt holes 31 and threading holes 32, and the sensor 21 are arranged directly below the cylindrical airbag 2 with a spacing of 1 m between two points. The data collector 23 is connected via a radio frequency cable 28. The high-speed camera 29 and the infrared camera 27 are placed at a safe distance and perpendicular to the cylindrical airbag 2. The drone 30 flies directly above the cylindrical airbag 2 to observe the entire test process.

[0060] After the cylindrical airbag 2 is inflated, all test instruments are turned on and the powder spraying time of the DHY-6 ignition delay device 8 is set to 10 seconds and the delayed detonation time is set to 10.01 seconds. The process of powder spraying, detonation, and data saving is performed. The test results are stored in the data acquisition computer 24, the infrared thermal imager computer 25, the high-speed camera computer 26, and the drone 30 respectively.

[0061] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can replace or change the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and the replacement or change should be included in the protection scope of the present invention.

Claims

1. A weakly confined gas-dust explosion test device, characterized by: include Main body; The main body comprises: a disc base (1), a cylindrical air bag (2) and a powder spraying device (3); The disc base (1) is provided with eight threaded openings, the four outer threaded openings are connected to the air pipe (11) through a one-way ball valve (14) and a quick connector (13) for gas distribution, and the four inner threaded openings are connected to the electrode base (36); The powder spraying device (3) is connected to the disc base (1) through an air pipe and is placed in the cylindrical air bag (2); The cylindrical air bag (2) is connected to the protruding circular ring portion on the surface of the disc base (1) through a silicone gasket (35) and a clamp (34); The invention also includes an ignition system, including a DHY-6 ignition delay device (8), a high-voltage wire (18), an electrode base (36), an electrode rod (16) and an ignition head (15), wherein the electrode base (36) is connected to the disc base (1), the electrode rod (16) passes through the disc base (1) through the electrode base (36) thread, the electrode rod (16) on the flat surface of the disc base (1) is connected to the DHY-6 ignition delay device (8) through the high-voltage wire (18), and the disc base (1) is connected to the ignition head (15) on one side of the cylindrical air bag (2); The invention also includes a data acquisition system, a sensor (21), a sensor base (22), a radio frequency cable (28), a data acquisition device (23), a data acquisition computer (24), a high-speed camera (29), a high-speed camera computer (26), an infrared thermal imager (27), an infrared thermal imager computer (25) and a drone (30), wherein the sensor (21) is placed directly below the cylindrical air bag (2), and the high-speed camera (29) and the infrared thermal imager (27) are placed on the side and perpendicular to the cylindrical air bag (2); The test gas distribution system includes a 15L air pressure container (5), a 15L combustible gas pressure container (6), a 0.3m 3 A pressure-resistant gas storage tank (4), a flammable gas cylinder (10), an air cylinder (9), a solenoid valve (17) and a gas pipe (11).

2. The weakly confined gas-dust explosion test device according to claim 1, characterized in that: The disc base (1) is a 304 alloy steel non-welded disc-shaped base with an overall diameter of 1000 mm and a wall thickness of 100 mm. The diameter of the protruding ring is 280 mm and the wall thickness is 150 mm. There are 8 threaded holes in total, 4 of which are quarter-threaded holes in the outer ring and 4 are M20*1.5 threaded holes in the inner ring.

3. The weakly confined gas-dust explosion test device according to claim 1, characterized in that: The cylindrical air bag (2) is a polyethylene PE plastic cylindrical air bag, and its size is customized according to the experimental requirements, with a specific diameter of 300 mm and a height of 5000 mm.

4. The weakly confined gas-dust explosion test device according to claim 1, characterized in that: The powder spraying device (3) is composed of a stainless steel cylindrical container (39) with an inner diameter of 50 mm, a height of 500 mm, a wall thickness of 10 mm, M60*1.5 external threads on both ends and a four-point threaded hole at the center of the bottom, a quick connector (13), a dispersion piece (37) and a porous nozzle (38) with M60*1.5 internal threads arranged in sequence. Except for the dispersion piece, the other components are fixed by threads, connected to the air pipe (11) and placed inside the cylindrical air bag (2).

5. The weakly confined gas-dust explosion test device according to claim 1, characterized in that: The ignition head (15) is a bare ignition head or a powder-packed ignition head, and the detonation energy is changed by the powder packing amount.

6. The weakly confined gas-dust explosion test device according to claim 1, characterized in that: The DHY-6 ignition delay device (8) is correspondingly connected to the electromagnetic valve (17), the air pipe (11) and the powder spraying device (3), and can set the powder spraying time and the ignition time when starting to realize the function of ignition when the dust cloud reaches an ideal concentration.

7. The weakly confined gas-dust explosion test device according to claim 1, characterized in that: 15L air pressure container (5), 15L combustible gas pressure container (6) and 0.3m 3 The pressure-resistant gas storage tank (4) is a Q345R carbon steel container that can withstand pressures of 1.35MPa, 1.35MPa and 1MPa respectively. A self-assembled gas container is formed by installing a vacuum gauge (19), a precision pressure gauge (20), a one-way ball valve (14) and a quick connector (13). At the same time, raw tape is wrapped around the connection points of each component and silicone rubber is applied to ensure sealing. The 15L air pressure container (5) and the 15L combustible gas pressure container (6) are both connected to the vacuum pump (7) through an air pipe (11).

8. The weakly confined gas-dust explosion test device according to claim 1, characterized in that: The sensor base (22) is composed of a base cover (33) made of stainless steel, bolt holes (31) and threading holes (32). When in use, it is buried underground, and the surface of the sensor base (22) is flush with the ground surface.

9. The weakly confined gas-dust explosion test device according to claim 1, characterized in that: When the 8 threaded through holes of the disc base (1) are idle, the ball valve (12) needs to be connected to ensure its air tightness. When installing the ball valve (12), it needs to be wrapped with raw tape and coated with silicone rubber.

10. The weakly confined gas-dust explosion test device according to claim 1, characterized in that: The radio frequency cable (28) is a dedicated data acquisition cable for the sensor (21) and the data collector (23).

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