High-safety hydrogen-oxygen mixed gas fire retardant device

Abstract

The invention discloses a high-safety hydrogen-oxygen mixed 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] The invention relates to the technical field of flame arresters, in particular to a high-safety hydrogen-oxygen mixed gas flame arrester. Background Art

[0002] When using flammable gases (such as hydrogen and oxygen), it is easy for the transmission pipeline to flash back, which may cause harm to equipment and personnel. In order to reduce the harm of flashback, industry technicians have developed a large number of fire-retardant technologies.

[0003] For example, the technical solution of the "Hydrogen-oxygen mixed gas dry-wet integrated flame arrester" with announcement number CN204182054U is: an explosion-proof membrane and a pressure sensor are installed at the bottom of the sub-flame arrester. Once the outlet encounters a flash explosion, it will directly impact the bottom of the sub-flame arrester. The explosion-proof membrane at the bottom of the sub-flame arrester will quickly explode and trigger the pressure sensor. The pressure sensor communicates with the control circuit in time to realize pipeline deflation and gas cut-off to prevent the gas from continuing to flash. The control circuit is based on a programmable controller and is a control circuit composed of common electronic components, pressure sensor liquid, and liquid level sensor. This technical solution requires a programmable controller and a sensor, and has problems such as complex structure.

[0004] The technical solution of the "Hydrogen-oxygen flame dry type flashback preventer" with announcement number CN2163662Y is: a piston and a valve stem are set in the sleeve of the fire stop tube, or a sphere is added to the air inlet, and the impact force at the moment of explosion is used to push the piston to stop the fire and prevent flashback. This technical solution does not disclose the position restriction characteristics of the valve stem or the sphere, and it may fail during use due to factors such as the installation orientation, external force, or preheating after the flash explosion; and the fire stop tube is directly connected to the side air outlet, and the hydrogen-oxygen gas burns quickly. Therefore, this technical solution has the problems of high use requirements and low reliability.

[0005] Therefore, there is an urgent need to design a high-safety hydrogen-oxygen mixture fire-retardant device with the characteristics of simple structure, good safety and high reliability. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, the technical solution adopted by the present invention is as follows:

[0007] A high-safety hydrogen-oxygen mixed gas fire-blocking device, characterized in that it comprises a water seal component (1), a gas outlet component (2) and a partition component (3);

[0008] The water seal assembly (1) comprises a water container (11) containing a non-flammable liquid, an air inlet pipe (12) is provided below the liquid level of the water container (11), and an air cavity (16) is provided above the liquid;

[0009] The gas outlet assembly (2) comprises a gas container (21) for containing combustible gas, the gas container (21) is in communication with the gas cavity (16) and is provided with a gas outlet pipe (25) for discharging the combustible gas, and a partition assembly (3) is provided on a pipeline for transmitting the combustible gas between the gas outlet pipe (25) and the gas container (21);

[0010] The partition assembly (3) comprises a valve seat (31) and a valve assembly (4); a valve plate hole (311) is provided on the valve seat (31); and a pre-explosion chamber (312) is provided on one side of the valve plate hole (311);

[0011] The valve assembly (4) comprises a valve plate (41) and a valve shaft (42); the valve plate (41) is provided with an air hole (411) for communicating the air cavity (16) and the air container (21); and the valve shaft (42) is provided with an air guide groove (421);

[0012] The valve shaft (42) and the valve plate (41) are airtightly slidably sleeved and are respectively in a connecting position and a blocking position. When the valve shaft (42) is in the connecting 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 sleeved with the valve plate hole (311), one end of the valve shaft (42) is located in the pre-explosion chamber (312), and the valve shaft (42) is switched from a connecting position to a blocking position by the combustible gas flashing in the pre-explosion chamber (312);

[0014] A moving magnetic ring (43) is disposed at one end of the valve shaft (42), and a corresponding fixed magnetic ring (44) is disposed on the valve plate (41), and both the moving magnetic ring (43) and the fixed magnetic ring (44) are permanent magnets;

[0015] A connecting pipe (24) is provided between the pre-explosion chamber (312) and the gas container (21).

[0016] Preferably, the valve seat (31) is provided with more than two pre-explosion chambers (312) connected in series with each other, the valve plate hole (311) is provided with more than two air holes (411) connected in series with the valve assemblies (4), and the valve shafts (42) of adjacent valve assemblies (4) are staggered with each other.

[0017] Preferably, a reset chamber (313) is provided on a side of the valve seat (31) 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 cylindrical structure.

[0018] Preferably, the magnetic pole directions of the moving magnetic ring (43) and the fixed magnetic ring (44) are the same.

[0019] Preferably, the connecting pipe (24) is spiral-shaped.

[0020] Preferably, a filler (26) is provided in the gas container (21), and the filler comprises asbestos and / or steel balls.

[0021] Preferably, a sealing ring (45) is provided on the valve plate (41).

[0022] Preferably, a water pipe (15) is provided at the bottom of the water container (11), and a liquid level pipe (14) is provided at the side.

[0023] Preferably, a porous plate filter (13) is provided below the liquid level of the non-flammable liquid in the water container (11).

[0024] Preferably, a flame baffle (27) is provided between the pre-explosion chamber (312), the connecting pipe (24) and the air outlet pipe (25).

[0025] Preferably, the gas container (21) is provided with a pressure valve (22) and an air inlet valve (23).

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. No need for electrical components such as power supply, it has the advantages of simple structure, good safety and high reliability;

[0028] 2. The valve shaft and valve plate are kept in position by permanent magnets, which are not affected by the installation direction and have good stability.

[0029] 3. Steel ball fillers are arranged in the gas container, and the irregular channels formed by the fillings cause the flame to constantly change direction when propagating in it, which increases the length and complexity of the propagation path, consumes flame energy, dissipates heat and cools down, and accelerates the extinguishing of the flame. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A perspective view of the present invention;

[0031] Figure 2 for Figure 1 Axonometric section view of

[0032] Figure 3 It is an overall cross-sectional view of the present invention;

[0033] Figure 4 for Figure 3 B is a partial enlarged view;

[0034] Figure 5 It is the top view of the valve seat;

[0035] Figure 6 It is the top view of the valve group;

[0036] Figure 7 for Figure 6 AA cross-sectional view (connected state and blocked state).

[0037] Among them: water seal component 1, water container 11, air inlet pipe 12, filter 13, liquid level pipe 14, water pipe 15, air cavity 16, air outlet component 2, air container 21, pressure valve 22, air inlet valve 23, connecting pipe 24, air outlet pipe 25, filler 26, flame baffle 27, partition component 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, sealing ring 45. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are for illustrative purposes only.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] Below, the present invention is further described in conjunction with the accompanying drawings and specific embodiments:

[0042] like Figures 1 to 7 As shown, a high-safety hydrogen-oxygen mixture fire-blocking device comprises a water seal component 1, a gas outlet component 2 and a partition component 3;

[0043] The water seal assembly 1 comprises a water container 11 containing a non-flammable liquid, an air inlet pipe 12 is provided below the liquid level of the water container 11, and an air cavity 16 is provided above the liquid;

[0044] The gas outlet assembly 2 includes a gas container 21 for containing combustible gas, the gas container 21 is connected to the gas cavity 16 and is provided with a gas outlet pipe 25 for discharging combustible gas, and a partition assembly 3 is provided on the pipeline for transmitting combustible gas between the gas outlet pipe 25 and the gas container 21;

[0045] The partition 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.

[0046] 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 for connecting the air cavity 16 and the air container 21. The valve shaft 42 is provided with an air guide groove 421.

[0047] The valve shaft 42 and the valve plate 41 are respectively in a connecting position and a blocking position in an airtight sliding sleeve connection. When the valve shaft 42 is in the connecting position, the air hole 411 is aligned with the air guide groove 421 (the air cavity 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 cavity 16 and the air container 21 are not connected).

[0048] The valve plate 41 is fitted with the valve plate hole 311 , one end of the valve shaft 42 is located in the pre-explosion chamber 312 , and the valve shaft 42 is converted from a connecting position to a blocking position by the combustible gas flashing in the pre-explosion chamber 312 .

[0049] This embodiment uses water electrolysis to produce hydrogen and oxygen and burn with a combustion gun as an example to illustrate that after hydrogen and oxygen are electrolyzed into hydrogen and oxygen by the electrolytic cell, they enter the water container 11 from the air inlet pipe 12 and are collected in the air cavity 16, and then are connected to the combustion gun for combustion through the air hole 411, the air container 21, the connecting pipe 24, the pre-explosion chamber 312 and the air outlet pipe 25 in sequence. When flashback occurs, hydrogen and oxygen flash in the pre-explosion chamber 312, and the kinetic energy generated by the flash causes the valve shaft 42 to be converted from the connected position to the blocked position (the initial state of the valve shaft 42 is set to the connected position), blocking the air hole 411 between the air container 21 and the air cavity 16. Through the small-scale flash explosion of the pre-explosion chamber 312 and the air container 21, a large-scale flash explosion in the air cavity 16 (water seal assembly 1) is avoided, the fire arrester and the electrolytic cell are protected, and the safety is improved. The size of the space of the pre-explosion chamber 312 is set according to the required force to drive the valve shaft 42.

[0050] After the safety of the fire arrester is improved through this embodiment, the volume of the air cavity 16 can be increased, the gas storage capacity can be increased, and the stability of the gas supply can be improved.

[0051] Furthermore, in order to improve reliability, Figures 2 to 5As shown, the valve seat 31 is provided with more than two pre-explosion chambers 312 connected in series, the valve plate hole 311 is provided with more than two air holes 411 connected in series with the valve assemblies 4, and the valve shafts 42 of adjacent valve assemblies 4 are staggered.

[0052] In this embodiment, two pre-explosion chambers 312 and four valve assemblies 4 are provided, and 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, fire can be successfully blocked.

[0053] Furthermore, the valve shaft 42 is initially set to the connecting position. After the fire is blocked, the valve shaft 42 is in the blocking position. In order to facilitate the resetting of the valve shaft 42, as shown in FIG. Figures 2 to 5 As shown, a reset chamber 313 is provided on one side of the valve seat 31 opposite to the pre-explosion chamber 312 , and a reset shaft 32 corresponding to the valve shaft 42 is provided in the reset chamber 313 , and the reset shaft 32 is an eccentric cylindrical structure.

[0054] Further, in order to prevent the valve shaft 42 from accidentally switching between the connecting position and the blocking position, as shown in FIG. Figures 6-7 As shown, a moving magnetic ring 43 is disposed at one end of the valve shaft 42, and a corresponding fixed magnetic ring 44 is disposed 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.

[0055] In this embodiment, the magnetic attraction and repulsion of permanent magnets are used to maintain the position, so as to prevent the fire arrester from being displaced by external forces such as transportation, vibration, and tilting, resulting in displacement of the valve shaft 42. 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. By adjusting the magnetic strength of the moving magnetic ring and the fixed magnetic ring and the gap between them, the force required to drive the valve shaft can be changed. According to the size of the parts and the structural requirements, the magnetic pole directions of the moving magnetic ring and the fixed magnetic ring can also be opposite when they are installed.

[0056] 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 action of magnetic pole repulsion to avoid accidental reset. When the flame is extinguished and safety is confirmed, the reset shaft 32 is rotated to reset the valve shaft 42 to the connecting position under the action of the eccentricity.

[0057] Furthermore, in order to prolong the time for the combustible gas in the pipeline to be flashed back to the gas container 21 (the combustion speed of hydrogen and oxygen reaches 12 m / s), it is ensured that the valve shaft 42 is reliably switched 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.

[0058] Furthermore, in order to increase the flame propagation resistance and reduce the temperature after the flash explosion, Figure 3 , 4 As shown, a filler 26 is provided in the gas container 21, and the filler 26 is a steel ball.

[0059] In this embodiment, the filler 26 is a micro-sized stainless steel bead, which has the following functions:

[0060] 1. Increase the flame propagation resistance. The irregular channels formed by the steel balls cause the flame to change direction constantly when propagating in them, which increases the length and complexity of the propagation path, consumes the flame energy, extinguishes it, and dissipates heat and cools down.

[0061] 2. Steel beads have good thermal conductivity, can absorb flame heat and quickly dissipate it, lowering the flame temperature. When the temperature drops below the ignition point of the combustible material, the flame will go out;

[0062] 3. Prevent sparks from flying. The steel bead filling layer can effectively prevent sparks from flying.

[0063] Furthermore, in order to improve the airtightness, 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 the valve plates 41, between the valve plate 41 and the water container 11, and between the valve plate 41 and the gas container 21.

[0064] 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 at the side.

[0065] In this embodiment, the water pipe 15 is used to take in or discharge water to control the liquid level. The liquid level tube 14 is used to observe the liquid level, which can be observed manually using a transparent tube or indicated by a sensor.

[0066] Furthermore, in order to improve the safety after the partition assembly 3 fails, a porous plate filter 13 is provided below the liquid level of the non-flammable liquid in the water container 11 .

[0067] In this embodiment, three porous plate filters 13 with different pore sizes are provided, and the pore sizes are respectively in the millimeter level and the nanometer level. The porous plate filters can increase the resistance to flame propagation, extend the flame propagation path 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 fire-blocking effect of the fire-blocking water seal.

[0068] Furthermore, in order to make the combustible gas in the pre-explosion chamber 312 flash and explode, the pre-explosion chamber 312 maintains sufficient pressure to drive the valve shaft 42, such as Figure 4As shown, a flame baffle 27 is provided between the pre-detonation chamber 312 and the connecting pipe 24 and the gas outlet pipe 25 .

[0069] The flame baffle 27 slows down the leakage of high-pressure gas during the flash explosion of the combustible gas, and maintains sufficient pressure in the pre-explosion chamber 312 to drive the valve shaft 42 to operate.

[0070] Further, such as Figure 3 As shown, the gas container 21 is provided with a pressure valve 22 and an air inlet valve 23 .

[0071] In this embodiment, when the pressure in the gas container 21 is too high, the pressure valve 22 releases the high pressure; when the high-temperature and high-pressure gas after the explosion of the gas container 21 is released, the internal temperature drops to form a negative pressure. At this time, the air inlet valve 23 opens to balance the pressure in the gas container 21, thereby preventing the non-flammable liquid in the water container 11 from being sucked into the partition component 3 and the air outlet component 2.

[0072] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the patent claims of the present invention.

Claims

1. A highly safe hydrogen-oxygen mixture fire-retardant device, characterized in that: It comprises a water seal component (1), an air outlet component (2) and a partition component (3); The water seal assembly (1) comprises a water container (11) containing a non-flammable liquid, an air inlet pipe (12) is provided below the liquid level of the water container (11), and an air cavity (16) is provided above the liquid; The gas outlet assembly (2) comprises a gas container (21) for containing combustible gas, the gas container (21) is in communication with the gas cavity (16) and is provided with a gas outlet pipe (25) for discharging the combustible gas, and a partition assembly (3) is provided on a pipeline for transmitting the combustible gas between the gas outlet pipe (25) and the gas container (21); The partition assembly (3) comprises a valve seat (31) and a valve assembly (4); a valve plate hole (311) is provided on the valve seat (31); a pre-explosion chamber (312) is provided on one side of the valve plate hole (311); and a connecting pipe (24) is provided between the pre-explosion chamber (312) and the gas container (21); The valve assembly (4) comprises a valve plate (41) and a valve shaft (42); the valve plate (41) is provided with an air hole (411) for communicating the air cavity (16) and the air container (21); and the valve shaft (42) is provided with an air guide groove (421); The valve shaft (42) and the valve plate (41) are airtightly slidably sleeved and are respectively in a connecting position and a blocking position. When the valve shaft (42) is in the connecting 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. A moving magnetic ring (43) is disposed at one end of the valve shaft (42), and a corresponding fixed magnetic ring (44) is disposed on the valve plate (41), and both the moving magnetic ring (43) and the fixed magnetic ring (44) are permanent magnets; The valve plate (41) is sleeved with the valve plate hole (311), one end of the valve shaft (42) is located in the pre-explosion chamber (312), and the valve shaft (42) is converted from a connecting position to a blocking position by the combustible gas that flashes in the pre-explosion chamber (312).

2. A high-safety hydrogen-oxygen mixed gas fire-retardant device as claimed in claim 1, characterized in that: The valve seat (31) is provided with more than two pre-explosion chambers (312) connected in series with each other, and the valve plate hole (311) is provided with more than two air holes (411) connected in series with the valve assemblies (4), and the valve shafts (42) of adjacent valve assemblies (4) are staggered with each other.

3. A high-safety hydrogen-oxygen mixed gas fire-retardant device as claimed in claim 1, characterized in that: A reset chamber (313) is provided on one side of the valve seat (31) 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.

4. A high-safety hydrogen-oxygen mixed gas fire-retardant device as claimed in claim 1, characterized in that: The magnetic pole directions of the moving magnetic ring (43) and the fixed magnetic ring (44) are the same.

5. A high-safety hydrogen-oxygen mixed gas fire-retardant device as claimed in claim 1, characterized in that: The connecting pipe (24) is in a spiral shape.

6. A high-safety hydrogen-oxygen mixed gas fire-retardant device as claimed in claim 1, characterized in that: The gas container (21) is provided with a filler (26), wherein the filler comprises asbestos and / or steel balls.

7. A high-safety hydrogen-oxygen mixed gas fire-retardant device as claimed in claim 1, characterized in that: The bottom of the water container (11) is provided with a water pipe (15), and the side thereof is provided with a liquid level pipe (14).

8. A high-safety hydrogen-oxygen mixed gas fire-retardant device as claimed in claim 1, characterized in that: A porous plate filter (13) is provided below the liquid level of the non-flammable liquid in the water container (11).

9. A high-safety hydrogen-oxygen mixed gas fire-retardant device as claimed in claim 1, characterized in that: A flame baffle (27) is provided between the pre-explosion chamber (312), the connecting pipe (24) and the gas outlet pipe (25).

10. A high-safety hydrogen-oxygen mixed gas fire-retardant device according to claim 1, characterized in that: The gas container (21) is provided with a pressure valve (22) and an air inlet valve (23).

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