Natural gas explosion performance testing device for simulating extreme environment

Abstract

The invention discloses a natural gas explosion performance testing device for simulating an extreme environment, which comprises an explosion-proof chamber, a bottom frame, an explosion impact sensing mechanism and an explosion gas introduction mechanism, a support frame is fixedly mounted on the bottom frame, the explosion-proof chamber is fixedly mounted on the support frame, an environment simulation system and an ignition system are assembled in the explosion-proof chamber, and the explosion-proof chamber is fixedly mounted on the explosion-proof chamber. The top end opening of the explosion-proof chamber is fixedly provided with a heat rejection device, a discharge port of the heat rejection device is fixedly communicated with a heat rejection pipe, the explosion impact sensing mechanism is rotationally assembled in the explosion-proof chamber, the supporting frame is provided with a servo motor, the servo motor drives the explosion impact sensing mechanism, and the explosion gas introduction mechanism is fixedly installed on the bottom frame. According to the full-circumferential dynamic pressure capture device, the servo motor drives the rotating frame and drives the piezoelectric sensor on the arc-shaped frame to rotate at the adjustable rotating speed, full-circumferential dynamic pressure capture is achieved, the pressure peak measurement error is greatly reduced, and the directional blind area is eliminated.

Description

Technical Field

[0001] The invention belongs to the technical field of natural gas simulation explosion testing, and in particular provides a natural gas explosion performance testing device for simulating extreme environments. Background Art

[0002] As an important clean energy source, natural gas is widely used in industry, power generation, and civil applications. However, natural gas is flammable and explosive. During transportation, storage, and extraction, leakage, equipment failure, or extreme environmental conditions can cause explosions, resulting in major accidents. To address this, researchers are using explosion simulations to improve safety protection. However, existing explosion simulations have the following drawbacks:

[0003] 1. The pressure relief design is simple, and residual pressure or flames after the explosion may flow back through the pipeline, causing a secondary accident;

[0004] 2. Fixed sensor arrays can only capture pressure / temperature signals in a single direction and cannot fully reflect the non-uniform propagation characteristics of explosion shock waves. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a natural gas explosion performance testing device that simulates extreme environments.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is: a natural gas explosion performance testing device that simulates extreme environments, comprising an explosion-proof chamber, a base frame, an explosion impact sensing mechanism and an explosion gas introduction mechanism, wherein a support frame is fixedly mounted on the base frame, and the explosion-proof chamber is fixedly mounted on the support frame, the explosion-proof chamber is equipped with an environmental simulation system and an ignition system, a heat extractor is fixedly mounted on the top opening of the explosion-proof chamber, and the exhaust port of the heat extractor is fixedly connected to a heat exhaust pipe, the explosion impact sensing mechanism is rotatably assembled in the explosion-proof chamber, a servo motor is mounted on the support frame, and the servo motor drives the explosion impact sensing mechanism, the explosion gas introduction mechanism is fixedly mounted on the base frame, and the explosion gas introduction mechanism injects natural gas and combustion-supporting gas into the explosion-proof chamber.

[0007] Furthermore, an electric gate valve is installed in the top opening of the explosion-proof chamber.

[0008] Furthermore, the explosion impact sensing mechanism includes an arc frame, a rotating frame and a mounting piece. The rotating frame is driven by a servo motor. A plurality of arc frames are fixedly mounted in a circular array on the outer periphery of the rotating frame. A plurality of mounting pieces are evenly assembled on the arc frame, and a piezoelectric sensor is fixedly mounted on the mounting piece.

[0009] Furthermore, the mounting part includes a sleeve, a mounting seat, a column and a fixing pin. Multiple sleeves are evenly fixedly installed on the outer wall of the upper arc rod of the arc frame. The column is L-shaped. The vertical rod of the column is movably assembled in the sleeve. Multiple fixing pins are evenly fixedly installed on the outer wall of the lower arc rod of the arc frame. The lower end of the mounting seat is sleeved on the fixing pin, and the horizontal rod of the column is inserted into the upper end of the mounting seat.

[0010] Furthermore, a sliding groove is provided on the side wall of the sleeve, and a sliding pin is fixedly installed on the outer wall of the plug post, and the sliding pin is located in the sliding groove.

[0011] Furthermore, the explosion gas introduction mechanism includes a gas storage chamber and an adaptive sealing mechanism. There are two gas storage chambers in total, and the gas storage chambers are fixedly installed on the base frame. The two gas storage chambers are respectively filled with natural gas and combustion-supporting gas. Air pumps are fixedly installed on the two gas storage chambers, and one end of the gas pipe is fixedly connected to the air pump. The adaptive sealing mechanism is fixedly connected to the outer wall of the explosion-proof chamber. Two injection ports are provided on the adaptive sealing mechanism, and the other end of the gas pipe is fixedly connected to the injection port. A metering control valve is fixedly installed on the gas pipe.

[0012] Furthermore, the adaptive sealing mechanism includes an injection shell, a connecting ring, a head, a sliding column and a spring. The right end of the injection shell is sealed and fixedly installed with a sealing plate. A sliding hole is opened in the middle of the surface of the sealing plate. The right end face of the sealing plate is fixedly installed with a connecting ring. The head is movably assembled in the connecting ring. One end of the sliding column is fixedly installed on the head, and the other end of the sliding column is fixedly installed with a limiting plate after passing through the sliding hole. A spring is installed between the limiting plate and the sealing plate, and the spring is wound on the sliding column. The surface of the sealing plate has air holes in an array along the circumference of the sliding hole, and the head seals the air holes.

[0013] Furthermore, the connecting ring includes a straight ring segment and a tapered ring segment, and the inner diameter of the straight ring segment is the same as the outer diameter of the head.

[0014] Furthermore, a plurality of observation windows are fixedly installed on the outer wall of the explosion-proof chamber.

[0015] The beneficial effects of using the present invention are:

[0016] 1. In the present invention, a servo motor drives the rotating frame, which drives the piezoelectric sensor on the arc frame to rotate at an adjustable speed, realizing full-circumferential dynamic pressure capture, greatly reducing the pressure peak measurement error and eliminating directional blind spots.

[0017] 2. In the present invention, when gas is injected, the gas pressure pushes the head to the right, opening the air hole; when the gas injection stops, the spring returns to the blockage, and during the simulated explosion test, the impact force generated can push the head in the opposite direction, thereby strengthening its seal and preventing the explosion impact from affecting the gas storage chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is one of the three-dimensional structural diagrams of the present invention;

[0019] Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the explosion gas introduction mechanism of the present invention;

[0021] Figure 4 Schematic diagram of the three-dimensional structure of the explosion impact sensor mechanism of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the mounting piece of the present invention.

[0023] The reference numerals in the figures include: 1. heat exhaust pipe; 2. heat exhauster; 3. explosion-proof chamber; 4. support frame; 5. base frame; 6. gas storage chamber; 8. air pump; 9. gas pipe; 10. observation window; 11. metering control valve; 12. gas injection shell; 13. spring; 14. connecting ring; 15. head; 16. sliding column; 17. sealing plate; 18. air hole; 19. limit plate; 20. piezoelectric sensor; 21. arc frame; 22. rotating frame; 23. sleeve; 24. sliding pin; 25. mounting seat; 26. plug column. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Reference Figures 1 to 5 A natural gas explosion performance test device for simulating extreme environments includes an explosion-proof chamber 3, a base frame 5, an explosion impact sensing mechanism and an explosion gas introduction mechanism. A support frame 4 is fixedly installed on the base frame 5, and the explosion-proof chamber 3 is fixedly installed on the support frame 4. The explosion-proof chamber 3 is equipped with an environmental simulation system and an ignition system. A heat extractor 2 is fixedly installed at the top opening of the explosion-proof chamber 3, and the exhaust port of the heat extractor 2 is fixedly connected to a heat exhaust pipe 1. The explosion impact sensing mechanism is rotatably assembled in the explosion-proof chamber 3, a servo motor is installed on the support frame 4, and the servo motor drives the explosion impact sensing mechanism. The explosion gas introduction mechanism is fixedly installed on the base frame 5, and the explosion gas introduction mechanism injects natural gas and combustion-supporting gas into the explosion-proof chamber 3.

[0026] The explosion gas introduction mechanism is used to introduce natural gas and combustion-supporting gas into the explosion-proof chamber 3, ignite and detonate them through the ignition system in the explosion-proof chamber 3, and the explosion impact sensing mechanism performs dynamic pressure capture to achieve the measurement of the explosion performance. The heat and airflow generated by the explosion are discharged through the heat exhauster 2 and the heat exhaust pipe 1.

[0027] An extreme environment is simulated in the explosion-proof chamber 3 by the environmental simulation system.

[0028] Specifically, an electric gate valve is installed in the top opening of the explosion-proof chamber 3 .

[0029] The electric gate valve is used to control the timing of heat and airflow discharge, ensuring that the electric gate valve is opened to discharge heat and airflow after the explosion performance measurement is completed.

[0030] Specifically, if Figure 4 As shown, the explosion impact sensing mechanism includes an arc frame 21, a rotating frame 22 and a mounting member. The rotating frame 22 is driven by a servo motor. A plurality of arc frames 21 are fixedly mounted in a circular array on the outer periphery of the rotating frame 22. A plurality of mounting members are evenly assembled on the arc frame 21, and a piezoelectric sensor 20 is fixedly mounted on the mounting member.

[0031] The servo motor drives the rotating frame 22, which drives the piezoelectric sensor 20 on the arc frame 21 to rotate, providing 360° spatial coverage within the explosion-proof chamber 3. The piezoelectric sensor 20 continuously captures dynamic pressure signals at different angles during rotation, achieving full-circumferential dynamic pressure capture, significantly reducing pressure peak measurement errors and eliminating directional blind spots. This makes it particularly suitable for analyzing the non-uniform propagation characteristics of explosion shock waves.

[0032] By controlling the servo motor, the rotation speed of the rotating frame 22 can be adjusted, thereby realizing the rotation speed adjustment of the piezoelectric sensor 20 to meet the measurement requirements of different explosion intensities.

[0033] The piezoelectric sensor 20 is heat-insulated and explosion-proof through a water-cooled housing and a silicone oil isolation membrane.

[0034] Specifically, if Figure 5 As shown, the mounting parts include a sleeve 23, a mounting seat 25, a column 26 and a fixing pin. Multiple sleeves 23 are evenly fixedly installed on the outer wall of the upper arc rod of the arc frame 21. The column 26 is L-shaped. The vertical rod of the column 26 is movably assembled in the sleeve 23. Multiple fixing pins are evenly fixedly installed on the outer wall of the lower arc rod of the arc frame 21. The lower end of the mounting seat 25 is sleeved on the fixing pin, and the horizontal rod of the column 26 is inserted into the upper end of the mounting seat 25.

[0035] There are sockets at different positions on the mounting base 25 for connecting with the plug post 26 and the fixing pin. A locking structure is provided when the mounting base 25 is connected with the plug post 26 and the fixing pin. The radial position of the mounting base 25 and the piezoelectric sensor 20 can be adjusted, and after locking, the mounting base 25 is prevented from falling due to the impact of the explosion.

[0036] Specifically, if Figure 5 As shown, a sliding groove is formed on the side wall of the sleeve 23, and a sliding pin 24 is fixedly installed on the outer wall of the plug post 26, and the sliding pin 24 is located in the sliding groove.

[0037] The movability of the plug post 26 can be adjusted in conjunction with the sockets at different positions on the mounting base 25, so that the height position of the piezoelectric sensor 20 can be adjusted.

[0038] Specifically, if Figure 1 and Figure 3 As shown, the explosion gas introduction mechanism includes a gas storage chamber 6 and an adaptive blocking mechanism. There are two gas storage chambers 6, and the gas storage chambers 6 are fixedly mounted on the base frame 5. The two gas storage chambers 6 are respectively filled with natural gas and combustion-supporting gas. An air pump 8 is fixedly mounted on the two gas storage chambers 6. The air pump 8 is fixedly connected to one end of a gas pipe 9. The adaptive blocking mechanism is fixedly connected to the outer wall of the explosion-proof chamber 3. Two injection ports are provided on the adaptive blocking mechanism, and the other end of the gas pipe 9 is fixedly connected to the injection port. A metering control valve 11 is fixedly mounted on the gas pipe 9.

[0039] Specifically, if Figure 3 As shown, the adaptive sealing mechanism includes an injection shell 12, a connecting ring 14, a head 15, a sliding column 16 and a spring 13. The right end of the injection shell 12 is sealed and fixedly installed with a sealing plate 17. A sliding hole is opened in the middle of the surface of the sealing plate 17. The right end face of the sealing plate 17 is fixedly installed with a connecting ring 14. The head 15 is movably assembled in the connecting ring 14. One end of the sliding column 16 is fixedly installed on the head 15, and the other end of the sliding column 16 is fixedly installed with a limiting plate 19 after passing through the sliding hole. A spring 13 is installed between the limiting plate 19 and the sealing plate 17, and the spring 13 is wound on the sliding column 16. The surface of the sealing plate 17 has air holes 18 in an array along the circumference of the sliding hole, and the head 15 blocks the air holes 18.

[0040] During gas injection, the gas pressure pushes the head 15 to the right, opening the air hole 18; when the gas injection stops, the spring 13 returns to its original position to seal the air hole 18, and during the simulated explosion test, the impact force generated can push the head 15 in the opposite direction, thereby strengthening its seal and preventing the explosion shock from affecting the gas storage chamber 6.

[0041] Specifically, if Figure 3 As shown, the connecting ring 14 includes a straight ring segment and a tapered ring segment, and the inner diameter of the straight ring segment is the same as the outer diameter of the head 15 .

[0042] Specifically, a plurality of observation windows 10 are fixedly mounted on the outer wall of the explosion-proof chamber 3 .

[0043] The observation window 10 is made of explosion-proof glass.

[0044] The multiple observation windows 10 on the periphery of the explosion-proof chamber 3 support high-speed cameras to shoot the flame propagation path from multiple perspectives, reducing the blind spots of the traditional single window.

[0045] The above content is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the concept of the present invention, many changes can be made in the specific implementation method and application scope. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of the present invention.

Claims

1. A natural gas explosion performance test device simulating extreme environments, characterized by: The invention comprises an explosion-proof chamber (3), a base frame (5), an explosion impact sensing mechanism and an explosion gas introduction mechanism, wherein a support frame (4) is fixedly mounted on the base frame (5), and the explosion-proof chamber (3) is fixedly mounted on the support frame (4), an environment simulation system and an ignition system are installed in the explosion-proof chamber (3), a heat exhauster (2) is fixedly mounted on the top opening of the explosion-proof chamber (3), and an exhaust port of the heat exhauster (2) is fixedly connected to a heat exhaust pipe (1), the explosion impact sensing mechanism is rotatably mounted in the explosion-proof chamber (3), a servo motor is mounted on the support frame (4), and the servo motor drives the explosion impact sensing mechanism, the explosion gas introduction mechanism is fixedly mounted on the base frame (5), and the explosion gas introduction mechanism injects natural gas and combustion-supporting gas into the explosion-proof chamber (3).

2. A natural gas explosion performance testing device simulating extreme environments according to claim 1, characterized in that: An electric gate valve is installed in the top opening of the explosion-proof chamber (3).

3. The natural gas explosion performance testing device for simulating extreme environments according to claim 2, characterized in that: The explosion impact sensing mechanism comprises an arc frame (21), a rotating frame (22) and a mounting member, wherein the rotating frame (22) is driven by a servo motor, a plurality of the arc frames (21) are fixedly mounted in a circular array on the outer periphery of the rotating frame (22), a plurality of the mounting members are evenly assembled on the arc frame (21), and a piezoelectric sensor (20) is fixedly mounted on the mounting member.

4. The natural gas explosion performance testing device for simulating extreme environments according to claim 3, characterized in that: The mounting member comprises a sleeve (23), a mounting seat (25), an insertion column (26) and a fixing pin. A plurality of the sleeves (23) are evenly fixedly mounted on the outer wall of the upper arc rod of the arc frame (21). The insertion column (26) is L-shaped. The vertical rod of the insertion column (26) is movably assembled in the sleeve (23). A plurality of the fixing pins are evenly fixedly mounted on the outer wall of the lower arc rod of the arc frame (21). The lower end of the mounting seat (25) is sleeved on the fixing pin, and the horizontal rod of the insertion column (26) is plugged into the upper end of the mounting seat (25).

5. The natural gas explosion performance testing device for simulating extreme environments according to claim 4, characterized in that: A sliding groove opening is provided on the side wall of the sleeve (23), and a sliding pin (24) is fixedly installed on the outer wall of the plug post (26), and the sliding pin (24) is located in the sliding groove opening.

6. The natural gas explosion performance testing device for simulating extreme environments according to claim 5, characterized in that: The explosion gas introduction mechanism includes a gas storage chamber (6) and an adaptive blocking mechanism. There are two gas storage chambers (6), and the gas storage chambers (6) are fixedly installed on the base frame (5). The two gas storage chambers (6) are filled with natural gas and combustion-supporting gas respectively. An air pump (8) is fixedly installed on the two gas storage chambers (6). One end of the gas pipe (9) is fixedly connected to the gas pump (8). The adaptive blocking mechanism is fixedly connected to the outer wall of the explosion-proof chamber (3). Two injection ports are provided on the adaptive blocking mechanism, and the other end of the gas pipe (9) is fixedly connected to the injection port. A metering control valve (11) is fixedly installed on the gas pipe (9).

7. The natural gas explosion performance testing device for simulating extreme environments according to claim 6, characterized in that: The adaptive blocking mechanism includes an air injection shell (12), a connecting ring (14), a head (15), a sliding column (16) and a spring (13). The right end of the air injection shell (12) is sealed and fixedly installed with a sealing plate (17). A sliding hole is opened in the middle of the surface of the sealing plate (17). The right end face of the sealing plate (17) is fixedly installed with a connecting ring (14). The head (15) is movably assembled in the connecting ring (14). One end of the sliding column (16) is fixedly installed on the head (15), and the other end of the sliding column (16) is fixedly installed with a limiting plate (19) after passing through the sliding hole. A spring (13) is installed between the limiting plate (19) and the sealing plate (17), and the spring (13) is wound on the sliding column (16). The surface of the sealing plate (17) has air holes (18) arranged along the circumference of the sliding hole, and the head (15) blocks the air holes (18).

8. The natural gas explosion performance testing device for simulating extreme environments according to claim 7, characterized in that: The connecting ring (14) comprises a straight ring section and a tapered ring section, and the inner diameter of the straight ring section is the same as the outer diameter of the head (15).

9. The natural gas explosion performance testing device for simulating extreme environments according to claim 1, characterized in that: A plurality of observation windows (10) are fixedly mounted on the outer wall of the explosion-proof chamber (3).

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