Experimental device suitable for multiphase mixed gas diffusion and explosion law

Abstract

The utility model provides an experimental device suitable for multiphase mixed gas diffusion and explosion laws, which comprises a device main body, a top flange is arranged at the top of the device main body, a bottom flange is arranged at the bottom of the device main body, and a central gas inlet pipeline penetrates through the device main body. A G1 / 2 threaded hole, an M8 * 1 threaded hole and an M20 * 1.5 threaded hole are formed in the top flange, and an M12 * 1.75 threaded hole is formed in the top flange pressing edge. High-transmittance quartz glass windows are formed in the forward center position and the backward center position of the device body, and an M20 * 1.5 threaded hole and an M8 * 1 threaded hole are formed in the side face of the device body in total. A G1 / 2 threaded hole, an M8 * 1 threaded hole and a G1 / 4 threaded hole are formed in the bottom flange, and an M12 * 1.75 threaded hole is formed in the top flange pressing edge. And an air inlet hole is formed in the central air inlet pipeline. The experimental device is suitable for experimental research on diffusion and burning explosion laws of corrosive gas; the research on the gas diffusion process and the fire blast evolution rule under different gas inlet position conditions can be carried out; parameters such as gas concentration, temperature in the device and explosion pressure can be measured, and a gas diffusion process and a gas explosion process can be shot.

Description

Technical Field

[0001] The utility model relates to the field of gas diffusion safety, and particularly relates to an experimental research device for the diffusion and combustion explosion law of multiphase mixed gas in a confined space. Background Technique

[0002] Combustible gases are currently widely used in industrial production and daily life, such as natural gas, hydrogen, ammonia, etc. However, when accidents such as leakage occur during the storage and transportation of combustible gases, combustion and explosion are extremely likely to occur, causing serious life and property losses. The primary means to prevent combustible gas combustion and explosion accidents is timely detection and alarm. Efficient detection requires a clear understanding of the diffusion and evolution law of combustible gases, which is of great benefit for determining the installation position of sensors. At the same time, mastering the combustion explosion law after an accident unfortunately occurs can take corresponding measures to effectively reduce the severity of the accident consequences.

[0003] In recent years, some experimental devices for gas diffusion and combustion explosion law research have been publicly disclosed.

[0004] Patent CN202111470441.4 discloses a gas diffusion simulation experimental device that can simulate gas diffusion experiments under different environments; Patent CN202110272465.2 discloses a gas diffusion experimental device and method with controllable humidity, enabling rock samples to conduct gas diffusion experiments in an environment with a preset constant relative humidity.

[0005] Patent CN202220510554.6 discloses a combustible gas combustion explosion experimental device for carrying out combustion explosion experimental research. The current utility model does not consider the experimental device required for the research on the diffusion and combustion explosion process of dangerous gases, and at the same time, the testing means are not considered in detail. Content of the Utility Model

[0006] Based on the above situation, the utility model is an experimental research device applicable to the diffusion law and combustion explosion law of multiphase mixed gas.

[0007] An experimental device applicable to the diffusion and combustion explosion law of multiphase mixed gas includes

[0008] The top of the device main body is a top flange, the bottom is a bottom flange, and a central intake pipe is arranged through the device main body;

[0009] There is a G1 / 2 threaded hole, multiple M8*1 threaded holes, and multiple M20*1.5 threaded holes on the top flange, and multiple M12*1.75 threaded holes are opened on the pressed edge of the top flange;

[0010] High-transparency quartz glass windows are provided at the front and back central positions of the device body, and multiple M20*1.5 threaded holes and multiple M8*1 threaded holes are provided on the side of the device body.

[0011] Multiple G1 / 2 threaded holes, multiple M8*1 threaded holes and multiple G1 / 4 threaded holes are provided on the bottom flange, and multiple M12*1.75 threaded holes are provided on the flanging of the top flange;

[0012] Multiple air inlet holes are provided on the central air inlet pipe.

[0013] The utility model has the following advantages:

[0014] 1. The utility model is applicable to the experimental research on the gas diffusion and combustion explosion law of corrosive gases;

[0015] 2. The utility model can carry out the research on the gas diffusion process and the combustion explosion evolution law under different air inlet position conditions;

[0016] 3. The utility model can measure parameters such as gas concentration, temperature inside the device and combustion explosion pressure, and can photograph the gas diffusion process and the gas combustion explosion process. Description of the Drawings

[0017] Figure 1 is the front view of the device of the utility model.

[0018] Figure 2 is the side view of the device.

[0019] Figure 3 Top flange top view.

[0020] Figure 4 is the bottom flange top view.

[0021] Figure 5 is the front view of the central air inlet pipe.

[0022] Among them, the top flange 1, the device body 2, the high-transparency quartz glass window 3, the bottom flange 4, the M20*1.5 threaded hole 5, the M8*1 threaded hole 6, the G1 / 2 threaded hole 7, the M12*1.75 threaded hole 9, the central air inlet pipe 10, and the air inlet hole 11. Detailed Embodiment

[0023] The following further describes the utility model in combination with the drawings and specific embodiments.

[0024] An experimental research device for the diffusion and combustion explosion law of a multiphase mixed gas in a confined space of the utility model includes

[0025] Top flange 1, device main body 2, high-transparency quartz glass window 3, bottom flange 4. The outer dimensions of the top flange 1 are length × width × height = 300 mm × 300 mm × 10 mm, the inner ring dimensions are length × width × height = 250 mm × 250 mm × 10 mm, and the edge pressing width is 25 mm. There is 1 G1 / 2 threaded hole 7, 4 M8*1 threaded holes 6 and 5 M20*1.5 threaded holes 5 on the top flange 1, and 20 M12*1.75 threaded holes 9 are opened on the edge pressing of the top flange.

[0026] The dimensions of the device main body 2 are length × width × height = 250 mm × 250 mm × 750 mm. There is a high-transparency quartz glass window 3 with dimensions of length × width = 500 mm × 200 mm at both the front and back center positions, with a thickness of 10 mm. A total of 24 M20*1.5 threaded holes 5 and 16 M8*1 threaded holes 6 are opened on the side.

[0027] There is 1 G1 / 2 threaded hole 7, 4 M8*1 threaded holes 6 and 5 G1 / 4 threaded holes 8 on the bottom flange 4, and 20 M12*1.75 threaded holes 9 are opened on the edge pressing of the top flange. The central intake pipe 10 is a seamless stainless steel pipe with a length of 750 mm, an outer diameter of 8 mm, and an inner diameter of 4 mm. There are 5 4-mm intake holes 11 opened on it.

[0028] Gas enters the device through the central intake pipe 10, and the opening position of the 4-mm intake hole 11 changes the intake position in the vertical direction; the central intake pipe 10 is connected to the device through the 8 G1 / 4 threaded holes 8 on the bottom flange, and by adjusting the position of the G1 / 4 threaded hole 8, the intake position in the horizontal direction is changed.

[0029] The top flange 1, device main body 2, and bottom flange 4 are flange and main body structures made of titanium alloy material, with the characteristics of light weight, high strength, and strong corrosion resistance, and are suitable for corrosive gas diffusion and combustion explosion scenarios. The high-transparency quartz glass window 3 is made of high-transparency optical glass material, with the characteristic of strong light transmittance, and can be used in combination with the schlieren system to photograph the microscopic evolution process of the air flow. Through the structural design, the intake is controlled by a single pipe, the pipe runs through the device from bottom to top, intake holes are opened at different positions of the pipe, and openings are provided at different positions of the bottom flange of the device, which can change the position of the intake pipe. Through this design, the gas leakage source position can be changed in both the horizontal and vertical directions.

[0030] If the device of the present utility model is used to study the diffusion process after hydrogen leakage, it is carried out according to the following steps:

[0031] a Assemble the experimental device as required. Use bolts to tightly fix the top flange 1 and the bottom flange 4 on the device body 2 through the M12*1.75 threaded hole 9. Install the gas concentration transmitter on the M20*1.5 threaded hole 5, install the temperature sensor on the M8*1 threaded hole 6, and connect the data collector;

[0032] b Install a vacuum pressure gauge at the position of the G1 / 2 threaded hole 7 on the top flange and connect the vacuum pump;

[0033] c Determine the opening position on the central intake pipe according to the experimental requirements, insert the central intake pipe into the device through the G1 / 4 threaded hole 8 on the bottom flange, and adjust the direction of the leakage hole;

[0034] d Turn on the vacuum pump to make the vacuum degree in the device reach 0.1 Mpa. Then inject air into the device through the G1 / 2 threaded hole 7 on the bottom flange until it reaches atmospheric pressure, and repeat this step 3 times;

[0035] e Intake air through the central intake pipe 10 and the intake hole 11, control the intake air flow rate, and collect relevant data;

[0036] f Process the data and analyze the results.

[0037] If studying the combustion and explosion process after hydrogen leakage, proceed as follows:

[0038] a Assemble the experimental device as required. Use bolts to tightly fix the top flange 1 and the bottom flange 4 on the device body 2 through the M12*1.75 threaded hole 9. Install the pressure sensor on the M20*1.5 threaded hole 5, install the temperature sensor on the M8*1 threaded hole 6, and connect the data collector;

[0039] b Install a vacuum pressure gauge at the position of the G1 / 2 threaded hole 7 on the top flange and connect the vacuum pump;

[0040] c Determine the opening position on the central intake pipe according to the experimental requirements, insert the central intake pipe into the device through the G1 / 4 threaded hole 8 on the bottom flange, and adjust the direction of the leakage hole;

[0041] d Turn on the vacuum pump to make the vacuum degree in the device reach 0.1 Mpa. Then inject air into the device through the G1 / 2 threaded hole 7 on the bottom flange until it reaches atmospheric pressure, and repeat this step 3 times;

[0042] e Intake air through the central intake pipe 10 and the intake hole 11. When the gas diffuses and distributes to a certain extent, use an electronic igniter to ignite and collect relevant data;

[0043] f Process the data and analyze the results.

Claims

1. An experimental device applicable to the diffusion and combustion explosion laws of multiphase mixed gases, characterized in that: It includes a top flange (1), a device body (2), a high-transparency quartz glass window (3), a bottom flange (4), M20*1.5 threaded holes (5), M8*1 threaded holes (6), G1 / 2 threaded holes (7), G1 / 4 threaded holes (8), M12*1.75 threaded holes (9), a central intake pipe (10) and intake holes (11); Among them, the top of the device body (2) is the top flange (1), the bottom is the bottom flange (4), and the central intake pipe (10) is arranged through the device body (2); There is 1 G1 / 2 threaded hole (7), multiple M8*1 threaded holes (6) and multiple M20*1.5 threaded holes (5) on the top flange (1), and multiple M12*1.75 threaded holes (9) are opened on the edge of the top flange (1); High-transparency quartz glass windows (3) are opened at the front and back central positions of the device body (2), and multiple M20*1.5 threaded holes (5) and multiple M8*1 threaded holes (6) are opened on the side of the device body (2) in total; There are multiple G1 / 2 threaded holes (7), multiple M8*1 threaded holes (6) and multiple G1 / 4 threaded holes (8) on the bottom flange (4), and multiple M12*1.75 threaded holes (9) are opened on the edge of the top flange; Multiple intake holes (11) are opened on the central intake pipe (10).

2. The experimental device according to claim 1, characterized in that: The external dimensions of the top flange (1) are length × width × height = 300mm × 300mm × 10mm, the inner ring dimensions are length × width × height = 250mm × 250mm × 10mm, and the edge pressing width is 25mm.

3. The experimental device according to claim 1, characterized in that: The dimensions of the device body (2) are length × width × height = 250mm × 250mm × 750mm.

4. The experimental device according to claim 1, characterized in that: The dimensions of the high-transparency quartz glass window (3) are length × width = 500mm × 200mm, and the thickness is 10mm.

5. The experimental device according to claim 1, characterized in that: The central intake pipe (10) is a seamless stainless steel pipe with a length of 750mm, an outer diameter of 8mm and an inner diameter of 4mm.

6. The experimental device according to claim 1, characterized in that: There is 1 G1 / 2 threaded hole (7), 4 M8*1 threaded holes (6) and 5 M20*1.5 threaded holes (5) on the top flange (1), and 20 M12*1.75 threaded holes (9) are opened on the edge of the top flange (1).

7. The experimental device according to any one of claims 1-6, characterized in that: High-transparency quartz glass windows (3) are opened at the front and back central positions of the device body (2), and 24 M20*1.5 threaded holes (5) and 16 M8*1 threaded holes (6) are opened on the side of the device body (2) in total.

8. The experimental device according to any one of claims 1 to 6, characterized in that: There is 1 G1 / 2 threaded hole (7), 4 M8*1 threaded holes (6) and 5 G1 / 4 threaded holes (8) on the bottom flange (4), and 20 M12*1.75 threaded holes (9) are opened on the edge of the top flange.

9. The experimental device according to any one of claims 1-6, characterized in that: There are 5 intake holes (11) with a diameter of 4mm on the central intake pipe (10).

10. The experimental device according to claim 9, characterized in that: The top flange (1) is a titanium alloy flange, the device body (2) is a titanium alloy structural body, and the bottom flange (4) is a titanium alloy flange.

Images