High-efficiency explosion-proof and flame-arresting device

Abstract

This utility model discloses a high-efficiency detonation flame arrester in the field of detonation flame arrester technology. It includes two symmetrically arranged flame arrester shells and a connecting pipe welded to the free ends of the two shells and extending through them. A flame arresting plate is provided in the inner cavity of the connection between the two shells. On both sides of the flame arresting plate are explosion-proof plates, sliding mechanisms, and sealing rings. Several sliding mechanisms are mounted around the explosion-proof plates, slidably connected to the inner cavity of the flame arrester shells, with the sliding direction pointing towards the flame arresting plate. The sealing ring is fixedly installed on the flame arresting plate. An obstruction mechanism is also provided inside the flame arrester shell to prevent the sliding mechanisms from sliding towards the flame arresting plate. Under normal operating conditions, gas passes through the sliding mechanisms and the flame arresting plate in the inner cavity of the flame arrester shell in the form of an airflow. When deflagration or detonation occurs, the high-pressure airflow drives the sliding mechanism through the explosion-proof plates to overcome the obstruction mechanism and slide towards the flame arresting plate, where it is sealed by the sealing ring, effectively preventing the propagation of flames, especially detonation flames.

Description

Technical Field

[0001] This utility model relates to the field of detonation arrestor and flame arrestor technology, specifically a high-efficiency detonation arrestor and flame arrestor. Background Technology

[0002] Hydrogen energy is gaining increasing attention as a new type of energy that is widely available, environmentally friendly, and highly efficient. In the hydrogen energy industry chain, hydrogen storage, transportation, and waste disposal play a crucial role in the production, use, and disposal of hydrogen. Because hydrogen is flammable and explosive, ensuring safety and efficiency in storage, transportation, and waste disposal is extremely important. Currently, hydrogen storage uses venting devices such as rupture plates to release overpressure during explosions. However, there are no effective flame-retardant and explosion-proof devices for storage, transportation, and waste disposal, and the locations of potential ignition sources are unclear, with numerous bends in the pipelines.

[0003] In the existing technology, flame arresters are generally composed of a flame arrestor plate and a flame arrestor shell. The flame arrestor plate is mostly a corrugated plate structure and is the main component to prevent the spread of flames. In order to achieve efficient flame arresting performance, especially to prevent detonation flames, a thicker flame arrestor plate is required, which inevitably increases the resistance loss.

[0004] Based on this, this utility model designs a high-efficiency explosion-proof flame arrester to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency flame arrester to solve the problem that the existing flame arresters generally consist of a flame arrestor plate and a flame arrester shell. The flame arrestor plate is mostly a corrugated plate structure and is the main component to prevent the spread of flames. In order to achieve high-efficiency flame arresting performance, especially to prevent detonation flames, a thicker flame arrestor plate is required, which inevitably increases the problem of resistance loss.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-efficiency explosion-proof flame arrester includes two symmetrically arranged flame arrester shells and a connecting pipe welded to the free ends of the two flame arrester shells and extending through them. The inner cavity of the connection between the two flame arrester shells is provided with a flame arresting plate. The flame arresting plate is provided with explosion-proof discs, sliding mechanisms and sealing rings on both sides. Several sliding mechanisms are installed around the explosion-proof discs. The sliding mechanisms are slidably connected to the inner cavity of the flame arrester shell and the sliding direction is towards the flame arresting plate. The sealing rings are fixedly installed on the flame arresting plate.

[0008] The flame arrester housing is also provided with a blocking mechanism, which is used to prevent the sliding mechanism from sliding toward the flame arrester plate.

[0009] Under normal operating conditions, the gas passes through the sliding mechanism and the flame arrester plate in the form of airflow in the inner cavity of the flame arrester shell and enters the connected storage tank or pipeline; when deflagration or detonation occurs, the high-pressure airflow drives the sliding mechanism through the explosion-proof plate to break through the obstruction of the obstruction mechanism, slide towards the flame arrester plate, and is sealed by the sealing ring to effectively prevent the spread of flame, especially the spread of detonation flame.

[0010] As a further embodiment of this utility model: the explosion-proof disc has a columnar structure, and an arc-shaped cavity is provided on the side away from the flame arrestor plate to facilitate airflow. The sliding mechanism includes a connecting rod and a first inclined surface, wherein: the connecting rod is installed around the explosion-proof disc, and its end extends into a sliding groove opened in the flame arrestor housing, the sliding groove corresponding to and matching the shape of the end of the connecting rod; the first inclined surface is symmetrically opened at the free end of the connecting rod, and the obstruction mechanism obstructs the sliding mechanism from sliding toward the flame arrestor plate through the first inclined surface.

[0011] As a further embodiment of this utility model: the obstructing mechanism is provided with several components corresponding to the connecting rods; a sliding cavity is provided on the outer shell of the flame arrester, the sliding cavity communicating with the sliding groove; the obstructing mechanism is installed in the sliding cavity and includes a limiting block, an obstructing block, a second inclined surface, and a spring, wherein: the limiting block is slidably connected in the sliding cavity and is used to drive the obstructing block; the obstructing block is fixedly installed at the end of the limiting block near the sliding groove, and extends out of the sliding cavity and enters the sliding groove; the second inclined surface is symmetrically opened at the free end of the obstructing block and is slidably connected to the first inclined surface; the spring is installed between the limiting block and the inner wall of the sliding cavity and is used to compress the limiting block.

[0012] As a further embodiment of this utility model: the sealing ring is installed on the inner wall of the flame arrester housing, and the sealing ring is provided with a sealing groove and a sealing bevel, wherein: the sealing groove corresponds to and matches the connecting rod, and the connecting rod slides into the sealing groove to seal the gap between the connecting rods; the sealing bevel is provided on the inner ring of the sealing ring near the explosion-proof disc, and the sealing bevel facilitates the explosion-proof disc to slide into the inner ring of the sealing ring.

[0013] As a further aspect of this utility model: the surface of the explosion-proof sheet has a toothed structure, and the outer diameter of the explosion-proof sheet is interference-fitted with the inner diameter of the sealing ring to achieve the sealing of the sealing ring.

[0014] As a further embodiment of this utility model: a first rubber ring and a second rubber ring are respectively provided on the contact surfaces of the two flame arrester housings. The first rubber ring extends outward with a protrusion, and the second rubber ring has a cavity that matches the protrusion of the first rubber ring. The protrusion is inserted into the cavity to seal the gap between the contact surfaces of the two flame arrester housings.

[0015] As a further embodiment of this utility model: the two flame arrester housing connection ends are respectively provided with a first flange, and a plurality of sealing U-shaped frames are installed on the outer walls of the two first flanges. The sealing U-shaped frames are fixed by bolts that penetrate the two first flanges; the free end of the connecting pipe is provided with a second flange for connecting to a pipeline or storage tank.

[0016] As a further embodiment of this utility model: the flame arrester housing is provided with a drain port, the drain port is sealed by a sealing cover, and the sealing cover is snapped or screwed onto the drain port.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] The arc-shaped cavity inside the explosion-proof disc in this invention facilitates the driving of the explosion-proof disc by high-pressure airflow; the sliding mechanism facilitates the stable movement of the explosion-proof disc towards the flame arrestor plate; the toothed structure on the surface of the explosion-proof disc facilitates the obstruction of high-pressure airflow; and the flame arrestor plate prevents the flame from passing through in small amounts, achieving the purpose of complete flame arrest.

[0019] In this invention, due to the high flame-retardant capability of the explosion-proof disc, the thickness of the flame-retardant plate can be reduced accordingly, thereby reducing the resistance drop of gas passage and achieving the purpose of low resistance drop gas passage under normal operating conditions.

[0020] In this invention, the connecting rod slides along the second inclined surface on the other side of the obstruction block via the first inclined surface on the other side, which enables the obstruction mechanism to obstruct the sliding mechanism again. The entire obstruction process can be repeated multiple times, reducing costs. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of this utility model;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0025] Figure 5This is a three-dimensional structural diagram of the explosion-proof plate and the sliding mechanism in this utility model;

[0026] Figure 6 This is a schematic diagram of the sealing ring in this utility model.

[0027] In the diagram: 1. Flame arrester housing; 11. First flange; 12. Sliding groove; 13. Sliding cavity; 14. Drain outlet; 15. Sealing cover; 16. First rubber ring; 17. Second rubber ring; 2. Connecting pipe; 21. Second flange; 3. Flame arrester plate; 4. Explosion arrester disc; 41. Arc-shaped cavity; 5. Sliding mechanism; 51. Connecting rod; 52. First inclined surface; 6. Obstruction mechanism; 61. Limiting block; 62. Obstruction block; 63. Second inclined surface; 64. Spring; 7. Sealing ring; 71. Sealing groove; 72. Sealing inclined surface; 8. Sealing U-shaped frame. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] This embodiment;

[0030] A high-efficiency explosion-proof flame arrester, please refer to [link / reference]. Figures 1-6 It includes two symmetrically arranged flame arrester housings 1, and a connecting pipe 2 welded to the free ends of the two flame arrester housings 1 and passing through them. The free end of the connecting pipe 2 is provided with a second flange 21 for connecting to a pipeline or storage tank.

[0031] Through the above technical solution, in this utility model, the connecting pipe 2 is connected to the connecting pipeline or storage tank through the second flange 21, which facilitates the connection of the pipeline.

[0032] In some examples, refer to Figure 1-6 As shown, the two flame arrester housings 1 are respectively provided with first flanges 11 at their connecting ends. Several sealing U-shaped frames 8 are installed on the outer walls of the two first flanges 11. The sealing U-shaped frames 8 are fixed by bolts that penetrate the two first flanges 11.

[0033] Through the above technical solution, in this utility model, the sealing U-shaped frame 8 is sleeved on the outside of two adjacent first flanges 11, and the sealing U-shaped frame 8 and the two first flanges 11 are connected by bolts.

[0034] In some examples, refer to Figure 1-6As shown, a first rubber ring 16 and a second rubber ring 17 are respectively provided on the contact surfaces of the two flame arrester housings 1. The first rubber ring 16 extends outward with a protrusion, and the second rubber ring 17 has a cavity that matches the protrusion of the first rubber ring 16. The protrusion is inserted into the cavity to seal the gap between the contact surfaces of the two flame arrester housings 1.

[0035] Through the above technical solution, the first rubber ring 16 and the second rubber ring 17 in this utility model are integrally molded from rubber material. The rubber material has a certain elasticity. During installation, it is convenient for the protruding end of the first rubber ring 16 to be squeezed through the gap of the second rubber ring 17 and enter the cavity. After entering the cavity, it returns to the initial state and fills the entire cavity. Since the first rubber ring 16 and the second rubber ring 17 are both annular structures, they can effectively seal the gaps at the joint and significantly improve the sealing performance of the joint.

[0036] In some examples, refer to Figure 1-6 As shown, a flame arrestor plate 3 is provided in the inner cavity at the connection of the two flame arrestor shells 1. An explosion-proof plate 4, a sliding mechanism 5 and a sealing ring 7 are provided on both sides of the flame arrestor plate 3. Several sliding mechanisms 5 are installed around the explosion-proof plate 4. The surface of the explosion-proof plate 4 has a toothed structure. The explosion-proof plate 4 has a columnar structure, and an arc-shaped cavity 41 is opened on the side away from the flame arrestor plate 3 to facilitate the passage of airflow.

[0037] Through the above technical solutions, the arc-shaped cavity 41 inside the explosion-proof disc 4 in this utility model facilitates the high-pressure airflow to drive the explosion-proof disc 4; the sliding mechanism 5 facilitates the stable movement of the explosion-proof disc 4 towards the flame arrestor plate 3; the toothed structure on the surface of the explosion-proof disc 4 facilitates the obstruction of the high-pressure airflow; and the flame arrestor plate 3 is set to prevent a small amount of flame from passing through, thereby achieving the purpose of complete flame arrest.

[0038] In some examples, refer to Figure 1-6 As shown, the sliding mechanism 5 is slidably connected to the inner cavity of the flame arrester housing 1, and the sliding direction is towards the flame arrester plate 3. The sliding mechanism 5 includes a connecting rod 51 and a first inclined surface 52, wherein: the connecting rod 51 is installed around the explosion-proof plate 4, and its end extends into the sliding groove 12 opened in the flame arrester housing 1. The sliding groove 12 corresponds to the end of the connecting rod 51 and matches its shape; the first inclined surface 52 is symmetrically opened at the free end of the connecting rod 51, and the obstruction mechanism 6 obstructs the sliding mechanism 5 from sliding towards the flame arrester plate 3 through the first inclined surface 52.

[0039] Through the above technical solution, the connection rod 51 and the sliding groove 12 in this utility model are designed to facilitate the stability of the explosion-proof plate 4 and the stability of its movement toward the flame arrestor plate 3; the obstruction mechanism 6 can obstruct the sliding mechanism 5 from sliding toward the flame arrestor plate 3 through the first inclined surface 52.

[0040] The working process of a flame arrester under normal operating conditions:

[0041] After the gas enters the inner cavity of the flame arrester housing 1 through the connecting pipe 2, the pressure of the gas decreases due to the increase in the inner cavity of the flame arrester housing 1. Part of the gas enters the explosion-proof disc 4 and flows out through the surface of the arc-shaped cavity 41 and passes through the gap between several connecting rods 51. Another part of the gas passes through the gap between several connecting rods 51. The two streams of gas merge and then pass through the flame arrester plate 3, and finally enter the storage tank or pipeline connected to it. The whole process is smooth.

[0042] Due to the high flame-arresting capability of the explosion-proof disc 4, the thickness of the flame-arresting plate 3 can be reduced accordingly, thereby reducing the resistance drop of gas passage and achieving the purpose of low resistance drop gas passage under normal operating conditions.

[0043] In some examples, refer to Figure 1-6 As shown, the flame arrester housing 1 is also provided with an obstruction mechanism 6, which is used to prevent the sliding mechanism 5 from sliding towards the flame arrester plate 3. The obstruction mechanism 6 is provided with several parts corresponding to the connecting rod 51. The flame arrester housing 1 is provided with a sliding cavity 13, which is connected to the sliding groove 12. The obstruction mechanism 6 is installed in the sliding cavity 13 and includes a limiting block 61, an obstruction block 62, a second inclined surface 63 and a spring 64. The limiting block 61 is slidably connected in the sliding cavity 13 and is used to drive the obstruction block 62. The obstruction block 62 is fixedly installed at the end of the limiting block 61 near the sliding groove 12 and extends out of the sliding cavity 13 and into the sliding groove 12. The second inclined surface 63 is symmetrically opened at the free end of the obstruction block 62 and is slidably connected to the first inclined surface 52. The spring 64 is installed between the limiting block 61 and the inner wall of the sliding cavity 13 and is used to squeeze the limiting block 61.

[0044] Through the above technical solution, the high-pressure airflow in this utility model drives the sliding mechanism 5 to overcome the obstruction of the obstruction mechanism 6 via the explosion-proof plate 4 and slides towards the flame arrestor plate 3. During subsequent sliding, the sliding mechanism 5 is not subject to additional resistance, thus reducing resistance loss. The connecting rod 51 slides along the second inclined plane 63 via the first inclined plane 52 to drive the obstruction block 62 to slide into the sliding cavity 13. The obstruction block 62 compresses the spring 64 via the limiting block 61 until the connecting rod 51 disengages from the obstruction block 62 and slides along the sliding groove 12 towards the flame arrestor plate 3. The obstruction of the sliding mechanism 5 by the obstruction mechanism 6 is achieved through the spring. The elastic force of spring 64 can be adjusted, and different springs 64 can be used for different requirements, which improves the applicability of this utility model; the connecting rod 51 slides along the second inclined surface 63 on the other side of the obstructing block 62 via the first inclined surface 52 on the other side, which can realize that the obstructing mechanism 6 obstructs the sliding mechanism 5 again. The entire obstruction process can be repeated multiple times, reducing costs; the setting of the limiting block 61 prevents the obstructing block 62 from sliding away from the sliding cavity 13; the setting of spring 64 realizes the obstruction of the sliding mechanism 5 by the obstructing mechanism 6, and different fire-resistant requirements can be achieved by changing spring 64.

[0045] In some examples, refer to Figure 1-6 As shown, the sealing ring 7 is fixedly installed on the flame arrester plate 3. The sealing ring 7 is installed on the inner wall of the flame arrester housing 1. The sealing ring 7 has a sealing groove 71 and a sealing bevel 72. The sealing groove 71 corresponds to and matches the connecting rod 51. The connecting rod 51 slides into the sealing groove 71 to seal the gap between the connecting rods 51. The sealing bevel 72 is opened on the inner ring of the sealing ring 7 near the explosion-proof disc 4. The sealing bevel 72 facilitates the explosion-proof disc 4 to slide into the inner ring of the sealing ring 7. The outer diameter of the explosion-proof disc 4 is interference-fitted with the inner diameter of the sealing ring 7 to achieve the sealing of the sealing ring 7.

[0046] Through the above technical solution, when deflagration or detonation occurs in the pipeline, a pressure wave greater than the original pressure will be generated in the pipeline. This pressure wave will reach the explosion-proof disc 4 before the flame. Under the action of the pressure wave, the explosion-proof disc 4 will drive the sliding mechanism 5 to break away from the obstruction of the obstruction mechanism 6 and move towards the flame arrestor plate 3. It will also seal the gap between several connecting rods 51 through the sealing ring 7, thus playing a role in flame arrest. The sealing groove 71 facilitates the insertion of several connecting rods 51 and seals the gap between the connecting rods 51. The sealing slope 72 facilitates the explosion-proof disc 4 to slide into the inner ring of the sealing ring 7. The outer diameter of the explosion-proof disc 4 is interference-fitted with the inner diameter of the sealing ring 7 to ensure a tight seal for the explosion-proof disc 4. The sealing ring 7 is integrally molded from rubber material, which has a certain degree of elasticity.

[0047] The working process of a flame arrester in preventing deflagration:

[0048] When a flame propagates in the pipe in the form of deflagration, the detonation wave is constantly compressed during propagation, making it faster than the flame propagation speed. The pressure is also significantly higher than the original system pressure, potentially increasing by more than 10 times. This deflagration wave enters the inner cavity of the flame arrester housing 1 through the connecting pipe 2, compressing the explosion-proof disc 4. The compressed explosion-proof disc 4 drives the connecting rod 51, which slides along the second inclined surface 63 via the first inclined surface 52, driving the obstruction block 62 to slide into the sliding cavity 13. Simultaneously, the obstruction block 62 compresses the spring 64 via the limiting block 61 until the connecting rod 51 disengages from the obstruction block 62 and slides along the sliding groove 12 towards the flame arrester plate 3. The connecting rod 51 inserts into the sealing groove 71, sealing the gap between the connecting rods. Simultaneously, the explosion-proof disc 4 slides into the inner ring of the sealing ring 7 via the sealing inclined surface 72, effectively preventing the propagation of the flame, especially the detonation flame.

[0049] In some examples, refer to Figure 1-6 As shown, the flame arrester housing 1 is provided with a drain port 14, which is sealed by a sealing cover 15. The sealing cover 15 is snapped or screwed onto the drain port 14.

[0050] Through the above technical solution, the debris inside the flame arrester housing 1 can be removed through the drain port 14, so as to avoid affecting the sliding of the explosion-proof plate 4 and the sliding mechanism 5; the sealing cover 15 is used to seal the drain port 14 to prevent external debris from entering the inner cavity of the flame arrester housing 1 through the drain port 14.

[0051] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A high-efficiency explosion-proof flame arrester, comprising two symmetrically arranged flame arrester housings (1), and a connecting pipe (2) welded to and extending through the free ends of the two flame arrester housings (1), characterized in that: A flame arrester plate (3) is provided in the inner cavity at the connection between the two flame arrester housings (1). An explosion-proof plate (4), a sliding mechanism (5) and a sealing ring (7) are provided on both sides of the flame arrester plate (3). Several sliding mechanisms (5) are installed around the explosion-proof plate (4). The sliding mechanism (5) is slidably connected to the inner cavity of the flame arrester housing (1) and the sliding direction is towards the flame arrester plate (3). The sealing ring (7) is fixedly installed on the flame arrester plate (3). The flame arrester housing (1) is also provided with an obstruction mechanism (6), which is used to prevent the sliding mechanism (5) from sliding toward the flame arrester plate (3); Under normal operating conditions, the gas passes through the sliding mechanism (5) and the flame arrester plate (3) in the inner cavity of the flame arrester housing (1) in the form of airflow, and enters the storage tank or pipeline connected to it; when deflagration or detonation occurs, the high-pressure airflow drives the sliding mechanism (5) through the explosion-proof plate (4) to break through the obstruction of the obstruction mechanism (6), slides towards the flame arrester plate (3), and is sealed by the sealing ring (7) to effectively prevent the spread of flame, especially the spread of detonation flame.

2. The high-efficiency explosion-proof flame arrester according to claim 1, characterized in that: The explosion-proof disc (4) has a columnar structure, and an arc-shaped cavity (41) is provided on the side away from the flame arrestor plate (3) to facilitate airflow. The sliding mechanism (5) includes a connecting rod (51) and a first inclined surface (52), wherein: The connecting rod (51) is installed around the explosion-proof plate (4) and its end extends into the sliding groove (12) opened in the flame arrester housing (1). The sliding groove (12) corresponds to the end of the connecting rod (51) and matches its shape. The first inclined surface (52) is symmetrically opened at the free end of the connecting rod (51), and the obstruction mechanism (6) obstructs the sliding mechanism (5) from sliding toward the fire arrester plate (3) through the first inclined surface (52).

3. The high-efficiency explosion-proof flame arrester according to claim 2, characterized in that: The obstruction mechanism (6) is provided with several components corresponding to the connecting rod (51). The flame arrester housing (1) has a sliding cavity (13) that communicates with the sliding groove (12). The obstruction mechanism (6) is installed in the sliding cavity (13) and includes a limiting block (61), an obstruction block (62), a second inclined surface (63), and a spring (64). The limiting block (61) is slidably connected in the sliding cavity (13) and is used to drive the obstruction block (62); The obstruction block (62) is fixedly installed at the end of the limiting block (61) near the sliding groove (12), and extends out of the sliding cavity (13) and into the sliding groove (12); The second inclined surface (63) is symmetrically opened at the free end of the obstruction block (62) and is slidably connected to the first inclined surface (52); The spring (64) is installed between the limiting block (61) and the inner wall of the sliding cavity (13) and is used to press the limiting block (61).

4. The high-efficiency explosion-proof flame arrester according to claim 3, characterized in that: The sealing ring (7) is installed on the inner wall of the flame arrester housing (1). The sealing ring (7) has a sealing groove (71) and a sealing bevel (72), wherein: The sealing groove (71) corresponds to and matches the connecting rod (51), and the connecting rod (51) slides into the sealing groove (71) to seal the gap between the connecting rods (51); The sealing bevel (72) is formed on the inner ring of the sealing ring (7) near the explosion-proof disc (4), and the sealing bevel (72) facilitates the explosion-proof disc (4) to slide into the inner ring of the sealing ring (7).

5. The high-efficiency explosion-proof flame arrester according to claim 4, characterized in that: The surface of the explosion-proof disc (4) has a toothed structure, and the outer diameter of the explosion-proof disc (4) is interference-fitted with the inner diameter of the sealing ring (7) to achieve the sealing of the sealing ring (7).

6. The high-efficiency explosion-proof flame arrester according to claim 5, characterized in that: A first rubber ring (16) and a second rubber ring (17) are respectively provided on the contact surfaces of the two flame arrester housings (1). The first rubber ring (16) extends outward with a protrusion, and the second rubber ring (17) has a cavity that matches the protrusion of the first rubber ring (16). The protrusion is inserted into the cavity to seal the gap between the contact surfaces of the two flame arrester housings (1).

7. A high-efficiency explosion-proof flame arrester according to claim 6, characterized in that: The two flame arrester housings (1) are respectively provided with a first flange (11) at the connection end. Several sealing U-shaped brackets (8) are installed on the outer wall of the two first flanges (11). The sealing U-shaped brackets (8) are fixed by bolts that penetrate the two first flanges (11). The free end of the connecting pipe (2) is provided with a second flange (21) for connecting to a pipeline or storage tank.

8. A high-efficiency explosion-proof flame arrester according to claim 7, characterized in that: The flame arrester housing (1) is provided with a drain port (14), which is sealed by a sealing cover (15). The sealing cover (15) is snapped or screwed onto the drain port (14).

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