High-safety combustible gas fire retardant device

Abstract

The utility model discloses a high-safety combustible gas fire retardant device which comprises a water seal assembly, a gas outlet assembly and a partition assembly. The water seal assembly comprises a water container, an air inlet pipe is arranged below the liquid level of the water container, and an air cavity is formed above liquid. The gas outlet assembly comprises a gas container for accommodating combustible gas, the gas container is communicated with the gas cavity and is provided with a gas outlet pipe, and a pipeline for transmitting the combustible gas between the gas outlet pipe and the gas container is provided with a partition assembly; the partition assembly comprises a valve seat and a valve assembly, a valve plate hole is formed in the valve seat, and a pre-explosion cavity is formed in one side of the valve plate hole; the valve assembly comprises a valve plate and a valve shaft, the valve shaft and the valve plate are in airtight sliding sleeving connection and located at the communicating position and the blocking position respectively, and the valve shaft and the valve plate are provided with a movable magnetic ring and a fixed magnetic ring respectively. And the valve shaft is converted from the communicating position to the blocking position and is driven by flashed combustible gas in the pre-explosion cavity. The device does not need electrical elements such as a power supply, and has the advantages of simple structure, good safety and high reliability.

Description

Technical Field

[0001] This utility model relates to the field of flame arrester technology, and in particular to a high-safety flame arrester for combustible gases. Background Technology

[0002] Combustible gases (such as hydrogen and oxygen) are prone to backfire in pipelines during use, which can harm equipment and personnel. In order to reduce the harm of backfire, industry technicians have developed a large number of flame-retardant technologies.

[0003] For example, the "Hydrogen-Oxygen Mixed Gas Dry-Wet Integrated Flame Arrester" (Announcement No. CN204182054U) uses a technical solution where an explosion-proof membrane and pressure sensor are installed at the bottom of the sub-flame arrester. If a flash explosion occurs at the outlet, it directly impacts the bottom of the sub-flame arrester, causing the explosion-proof membrane to quickly burst and trigger the pressure sensor. The pressure sensor then communicates with the control loop to release and shut off the gas supply, preventing further flash explosions. The control loop is based on a programmable logic controller (PLC) and consists of common electronic components, pressure sensors, and liquid level sensors. This technical solution requires a PLC and sensors, resulting in a complex structure.

[0004] The "Hydrogen-Oxygen Flame Dry Backfire Preventer" with announcement number CN2163662Y uses a technical solution involving a piston and valve stem installed inside the sleeve of a flame-stopping tube, or a ball added to the inlet. The piston is activated by the instantaneous impact of the explosion to prevent backfire. However, this technical solution does not disclose the positional limitations of the valve stem or ball, and may fail due to factors such as installation orientation, external forces, or preheating after a flash explosion. Furthermore, the flame-stopping tube is directly connected to the side outlet, while hydrogen and oxygen burn rapidly. Therefore, this technical solution suffers from high usage requirements and low reliability.

[0005] Therefore, there is an urgent need to design a highly safe flame arrestor for combustible gases, which features simple structure, good safety and high reliability. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, the technical solution adopted by this utility model is as follows:

[0007] A high-safety combustible gas flame arrestor, characterized in that it includes a water seal assembly (1), an exhaust assembly (2), and a partition assembly (3);

[0008] The water seal assembly (1) includes a water container (11) containing a non-flammable liquid. An air inlet pipe (12) is provided below the liquid level in the water container (11), and an air chamber (16) is located above the liquid.

[0009] The gas outlet assembly (2) includes a gas container (21) for containing combustible gas. The gas container (21) is connected to the gas chamber (16) and is provided with a gas outlet pipe (25) for discharging combustible gas. A partition assembly (3) is provided on the pipeline for transmitting combustible gas between the gas outlet pipe (25) and the gas container (21).

[0010] The isolation assembly (3) includes a valve seat (31) and a valve assembly (4). The valve seat (31) is provided with a valve plate hole (311), and a pre-explosion chamber (312) is provided on one side of the valve plate hole (311).

[0011] The valve assembly (4) includes a valve plate (41) and a valve shaft (42). The valve plate (41) is provided with an air hole (411) that connects the air chamber (16) and the air container (21). The valve shaft (42) is provided with an air guide groove (421).

[0012] The valve shaft (42) and valve plate (41) are airtightly slidably connected in the communicating position and the blocking position, respectively. When the valve shaft (42) is in the communicating position, the air hole (411) is aligned with the air guide groove (421). When the valve shaft (42) is in the blocking position, the air hole (411) and the air guide groove (421) are staggered.

[0013] The valve plate (41) is fitted with the valve plate hole (311), and one end of the valve shaft (42) is located in the pre-explosion chamber (312). The valve shaft (42) is driven by the combustible gas that flashes in the pre-explosion chamber (312) to change from the connected position to the blocked position.

[0014] Preferably, the valve seat (31) is provided with two or more pre-explosion chambers (312) connected in series, and the valve plate hole (311) is provided with two or more air holes (411) connected in series to form valve assemblies (4), and the valve shafts (42) of adjacent valve assemblies (4) are intersected.

[0015] Preferably, the valve seat (31) is provided with a reset chamber (313) on the side opposite to the pre-explosion chamber (312), and the reset chamber (313) is provided with a reset shaft (32) corresponding to the valve shaft (42), and the reset shaft (32) is an eccentric columnar structure.

[0016] Preferably, a moving magnetic ring (43) is provided at one end of the valve shaft (42), and a corresponding fixed magnetic ring (44) is provided on the valve plate (41). Both the moving magnetic ring (43) and the fixed magnetic ring (44) are permanent magnets with the same magnetic pole direction.

[0017] Preferably, a connecting pipe (24) is provided between the pre-explosion chamber (312) and the gas container (21), and the connecting pipe (24) is spiral.

[0018] Preferably, the gas container (21) is provided with a filler (26), the filler including asbestos and / or steel balls.

[0019] Preferably, a sealing ring (45) is provided on the valve plate (41).

[0020] Preferably, the water container (11) is provided with a water pipe (15) at the bottom and a liquid level pipe (14) on the side.

[0021] Preferably, a porous plate filter (13) is provided below the surface of the non-flammable liquid in the water container (11).

[0022] Preferably, a flame deflector (27) is provided between the pre-explosion chamber (312) and the connecting pipe (24) and the vent pipe (25).

[0023] Preferably, the gas container (21) is provided with a pressure valve (22) and an air inlet valve (23).

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] 1. It requires no power supply or other electrical components, and has the advantages of simple structure, good safety, and high reliability;

[0026] 2. The valve shaft and valve plate are held in place by permanent magnets, which are not affected by the installation direction and have good stability.

[0027] 3. The gas container is filled with steel balls, which form irregular channels that cause the flame to constantly change direction as it propagates, increasing the length and complexity of the propagation path, consuming flame energy, dissipating heat and cooling down, and accelerating flame extinguishing. Attached Figure Description

[0028] Figure 1 This is a perspective view of the present utility model;

[0029] Figure 2 for Figure 1 Axonometric sectional view;

[0030] Figure 3 This is an overall sectional view of the present invention;

[0031] Figure 4 for Figure 3 A magnified view of part B;

[0032] Figure 5 This is a top view of the valve seat;

[0033] Figure 6 This is a top view of the valve assembly;

[0034] Figure 7 for Figure 6AA cross-sectional view (connected state and blocked state).

[0035] The components include: water seal assembly 1, water container 11, air inlet pipe 12, filter 13, liquid level pipe 14, water pipe 15, air chamber 16, air outlet assembly 2, air container 21, pressure valve 22, air inlet valve 23, connecting pipe 24, air outlet pipe 25, filler material 26, flame deflector 27, isolation assembly 3, valve seat 31, valve plate hole 311, pre-explosion chamber 312, reset chamber 313, reset shaft 32, valve assembly 4, valve plate 41, air hole 411, valve shaft 42, air guide groove 421, moving magnetic ring 43, fixed magnetic ring 44, and sealing ring 45. Detailed Implementation

[0036] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," "up," "down," and similar expressions used in this document are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0040] like Figures 1-7 As shown, a high-safety combustible gas flame arrestor includes a water seal assembly 1, a gas outlet assembly 2, and an isolation assembly 3.

[0041] The water seal assembly 1 includes a water container 11 containing a non-flammable liquid, with an air inlet pipe 12 below the liquid level and an air chamber 16 above the liquid.

[0042] The gas outlet assembly 2 includes a gas container 21 that contains combustible gas. The gas container 21 is connected to the gas chamber 16 and is provided with a gas outlet pipe 25 that discharges combustible gas. A partition assembly 3 is provided on the pipeline that transmits combustible gas between the gas outlet pipe 25 and the gas container 21.

[0043] The isolation assembly 3 includes a valve seat 31 and a valve assembly 4. The valve seat 31 is provided with a valve plate hole 311, and a pre-explosion chamber 312 is provided on one side of the valve plate hole 311.

[0044] The valve assembly 4 includes a valve plate 41 and a valve shaft 42. The valve plate 41 is provided with an air hole 411 that connects the air chamber 16 and the air container 21. The valve shaft 42 is provided with an air guide groove 421.

[0045] The valve shaft 42 and the valve plate 41 are in the airtight sliding sleeve position and the blocking position respectively. When the valve shaft 42 is in the airtight position, the air hole 411 is aligned with the air guide groove 421 (the air chamber 16 and the air container 21 are connected). When the valve shaft 42 is in the blocking position, the air hole 411 and the air guide groove 421 are staggered (the air chamber 16 and the air container 21 are not connected).

[0046] The valve plate 41 is fitted with the valve plate hole 311, and one end of the valve shaft 42 is located in the pre-explosion chamber 312. The valve shaft 42 is driven by the combustible gas that flashes in the pre-explosion chamber 312 to change from the connected position to the blocked position.

[0047] This embodiment uses the production of hydrogen and oxygen through water electrolysis and combustion with a burner as an example. After being electrolyzed in the electrolytic cell, the hydrogen and oxygen enter the water container 11 through the inlet pipe 12 and are collected in the gas chamber 16. Then, they sequentially pass through the gas hole 411, gas container 21, connecting pipe 24, pre-explosion chamber 312, and outlet pipe 25 to the burner for combustion. When backfire occurs, the hydrogen and oxygen undergo a flash explosion in the pre-explosion chamber 312. The kinetic energy generated by the flash explosion causes the valve shaft 42 to change from the connected position to the blocked position (the initial state of the valve shaft 42 is set to the connected position), blocking the gas hole 411 between the gas container 21 and the gas chamber 16. The small-scale flash explosions in the pre-explosion chamber 312 and gas container 21 prevent large-scale flash explosions in the gas chamber 16 (water seal assembly 1), protecting the flame arrestor and the electrolytic cell, and improving safety. The size of the pre-explosion chamber 312 is determined according to the force required to drive the valve shaft 42.

[0048] By improving the safety of the flame arrestor through this embodiment, the volume of the gas chamber 16 can be increased, the gas storage capacity can be increased, and the stability of the gas supply can be improved.

[0049] Furthermore, in order to improve reliability, such as Figures 2-5As shown, the valve seat 31 is provided with two or more pre-explosion chambers 312 connected in series, and the valve plate hole 311 is provided with two or more air holes 411 connected in series, and the valve shafts 42 of adjacent valve assemblies 4 are intersected.

[0050] In this embodiment, two pre-explosion chambers 312 and four valve assemblies 4 are provided. Each pre-explosion chamber 312 corresponds to two valve assemblies 4. As long as any one of the valve shafts 42 is switched to the blocking position, the fire can be successfully stopped.

[0051] Furthermore, the valve shaft 42 is initially set to the connected position. After flame arrest, the valve shaft 42 is in the blocked position. To facilitate the reset of the valve shaft 42, such as... Figures 2-5 As shown, a reset chamber 313 is provided on the side of the valve seat 31 opposite to the pre-explosion chamber 312. The reset chamber 313 is provided with a reset shaft 32 corresponding to the valve shaft 42. The reset shaft 32 is an eccentric columnar structure.

[0052] Furthermore, to prevent the valve shaft 42 from accidentally switching between the connected and blocked positions, such as Figures 6-7 As shown, a moving magnetic ring 43 is provided at one end of the valve shaft 42, and a corresponding fixed magnetic ring 44 is provided on the valve plate 41. Both the moving magnetic ring 43 and the fixed magnetic ring 44 are permanent magnets with the same magnetic pole direction.

[0053] In this embodiment, the magnetic attraction and repulsion of permanent magnets are used to maintain the position, preventing displacement of the valve shaft 42 caused by external forces such as handling, vibration, and tilting. When the valve shaft 42 is in the connected position, the magnetic poles of the moving magnetic ring 43 and the fixed magnetic ring 44 attract each other; when the valve shaft 42 is in the blocked position, the magnetic poles of the moving magnetic ring 43 and the fixed magnetic ring 44 repel each other. Adjusting the magnetic strength of the moving and fixed magnetic rings and the gap between them can change the force required to drive the valve shaft. Depending on the size of the parts and structural requirements, the magnetic pole directions of the moving and fixed magnetic rings can also be opposite during installation.

[0054] like Figure 4 , 7 As shown, when the valve shaft 42 is in the blocking position, the moving magnetic ring 43 on the valve shaft 42 slides to the outside of the fixed magnetic ring 44 and maintains a stable position under the repulsive force of the magnetic poles, thus preventing accidental reset. After the flame is extinguished and safety is confirmed, the reset shaft 32 is rotated, and the valve shaft 42 is reset to the connecting position under the action of the eccentricity.

[0055] Furthermore, in order to prolong the time for the combustible gas in the pipeline to flashback to the gas container 21 (the combustion rate of hydrogen and oxygen reaches 12 m / s), and to ensure that the valve shaft 42 reliably switches to the blocking position, such as... Figure 1 , 2 As shown, a connecting pipe 24 is provided between the pre-explosion chamber 312 and the gas container 21, and the connecting pipe 24 is spiral in shape.

[0056] Furthermore, in order to increase the resistance to flame propagation and reduce the temperature after the flash explosion, Figure 3 , 4 As shown, the gas container 21 is filled with a filler 26, which is a steel ball.

[0057] In this embodiment, the filler 26 is a micro-sized stainless steel bead, and its function is as follows:

[0058] 1. Increases the resistance to flame propagation. The irregular channels formed by the steel balls cause the flame to constantly change direction as it propagates, increasing the length and complexity of the propagation path, consuming flame energy, extinguishing it, and cooling it down.

[0059] 2. Steel balls have good thermal conductivity, which can absorb the heat of the flame and dissipate it quickly, reducing the flame temperature. When the temperature drops below the ignition point of the combustible material, the flame will be extinguished.

[0060] 3. Prevents sparks from flying; the steel ball filling layer effectively blocks sparks from flying.

[0061] Furthermore, in order to improve airtightness, such as Figure 4 , 7 As shown, a sealing ring 45 is provided on the valve plate 41. The sealing ring 45 is used for sealing between valve plates 41, between valve plate 41 and water container 11, and between valve plate 41 and gas container 21.

[0062] Furthermore, in order to facilitate the control and observation of the liquid level in the water container 11, a water pipe 15 is provided at the bottom of the water container 11 and a liquid level pipe 14 is provided on the side.

[0063] In this embodiment, the water pipe 15 is used for water inlet or outlet to control the liquid level. The liquid level pipe 14 is used to observe the liquid level; it can be observed manually using a transparent tube or indicated by a sensor.

[0064] Furthermore, in order to improve safety after the partition component 3 fails, a porous plate filter 13 is provided below the liquid level of the non-flammable liquid in the water container 11.

[0065] In this embodiment, three porous plate filters 13 with different pore sizes are provided, namely millimeter-level and nanometer-level. The porous plate filters can increase the resistance to flame propagation, extend the propagation path of the flame in the non-flammable liquid, make the flame easier to extinguish when passing through the filter, effectively prevent the flame from spreading, and improve the flame-retardant effect of the fire-retardant water seal.

[0066] Furthermore, in order to maintain sufficient pressure within the pre-detonation chamber 312 to drive the valve shaft 42 during a flash explosion of the combustible gas, such as... Figure 4As shown, a flame deflector 27 is provided between the pre-explosion chamber 312 and the connecting pipe 24 and the vent pipe 25.

[0067] The flame deflector 27 reduces the leakage of high-pressure gas during the flash explosion of combustible gas and maintains sufficient pressure in the pre-explosion chamber 312 to drive the valve shaft 42 to operate.

[0068] Furthermore, such as Figure 3 As shown, the gas container 21 is equipped with a pressure valve 22 and an air inlet valve 23.

[0069] In this embodiment, when the pressure inside the gas container 21 is too high, the pressure valve 22 releases high pressure; after the high temperature and high pressure gas after the gas container 21 explodes is released, the internal temperature drops and a negative pressure is formed. At this time, the air inlet valve 23 opens to balance the pressure inside the gas container 21, preventing the non-flammable liquid in the water container 11 from being sucked into the isolation component 3 and the air outlet component 2.

[0070] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model patent.

Claims

1. A high-safety flame arrestor for combustible gases, characterized in that: It includes a water seal assembly (1), an air outlet assembly (2), and a partition assembly (3); The water seal assembly (1) includes a water container (11) containing a non-flammable liquid. An air inlet pipe (12) is provided below the liquid level in the water container (11), and an air chamber (16) is located above the liquid. The gas outlet assembly (2) includes a gas container (21) for containing combustible gas. The gas container (21) is connected to the gas chamber (16) and is provided with a gas outlet pipe (25) for discharging combustible gas. A partition assembly (3) is provided on the pipeline for transmitting combustible gas between the gas outlet pipe (25) and the gas container (21). The isolation assembly (3) includes a valve seat (31) and a valve assembly (4). The valve seat (31) is provided with a valve plate hole (311), and a pre-explosion chamber (312) is provided on one side of the valve plate hole (311). The valve assembly (4) includes a valve plate (41) and a valve shaft (42). The valve plate (41) is provided with an air hole (411) that connects the air chamber (16) and the air container (21). The valve shaft (42) is provided with an air guide groove (421). The valve shaft (42) and valve plate (41) are airtightly slidably connected in the communicating position and the blocking position, respectively. When the valve shaft (42) is in the communicating position, the air hole (411) is aligned with the air guide groove (421). When the valve shaft (42) is in the blocking position, the air hole (411) and the air guide groove (421) are staggered. The valve plate (41) is fitted with the valve plate hole (311), and one end of the valve shaft (42) is located in the pre-explosion chamber (312). The valve shaft (42) is driven by the combustible gas that flashes in the pre-explosion chamber (312) to change from the connected position to the blocked position.

2. The high-safety combustible gas flame arrestor as described in claim 1, characterized in that: The valve seat (31) is provided with two or more pre-explosion chambers (312) connected in series, and the valve plate hole (311) is provided with two or more air holes (411) connected in series to form valve assemblies (4), and the valve shafts (42) of adjacent valve assemblies (4) are intersected.

3. The high-safety combustible gas flame arrestor as described in claim 1, characterized in that: The valve seat (31) is provided with a reset chamber (313) on the side opposite to the pre-explosion chamber (312). The reset chamber (313) is provided with a reset shaft (32) corresponding to the valve shaft (42). The reset shaft (32) is an eccentric columnar structure.

4. The high-safety combustible gas flame arrestor as described in claim 1, characterized in that: A moving magnetic ring (43) is provided at one end of the valve shaft (42), and a corresponding fixed magnetic ring (44) is provided on the valve plate (41). Both the moving magnetic ring (43) and the fixed magnetic ring (44) are permanent magnets with the same magnetic pole direction.

5. A high-safety combustible gas flame arrestor as described in claim 1, characterized in that: A connecting pipe (24) is provided between the pre-explosion chamber (312) and the gas container (21), and the connecting pipe (24) is spiral in shape.

6. The high-safety combustible gas flame arrestor as described in claim 1, characterized in that: The gas container (21) is provided with a filler (26), which includes asbestos and / or steel balls.

7. A high-safety combustible gas flame arrestor as described in claim 1, characterized in that: The water container (11) is provided with a water pipe (15) at the bottom and a liquid level pipe (14) on the side.

8. A high-safety flame arrestor for combustible gas as described in claim 1, characterized in that: A porous plate filter (13) is installed below the surface of the non-flammable liquid in the water container (11).

9. A high-safety combustible gas flame arrestor as described in claim 1, characterized in that: A flame deflector (27) is provided between the pre-explosion chamber (312) and the connecting pipe (24) and the vent pipe (25).

10. A high-safety flame arrestor for combustible gas as described in claim 1, characterized in that: The gas container (21) is equipped with a pressure valve (22) and an air inlet valve (23).

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