Anti-backfire device for multifunctional hydrogen-oxygen generator

Abstract

The utility model discloses an anti-backfire device for a multifunctional hydrogen-oxygen generator, which belongs to the technical field of hydrogen-oxygen generators and comprises a tank body, the tank body is communicated with a gas outlet end of the hydrogen-oxygen generator, an isolation pipe is arranged in the tank body, an outer cavity is formed between the isolation pipe and the tank body, an isolation cavity is arranged in the isolation pipe, and the isolation cavity is communicated with the outer cavity. A back suction assembly is arranged on the upper portion of the isolation pipe and communicates with the isolation cavity, washing media are arranged in the isolation cavity and the outer cavity, liquid seal can be automatically formed after deflagration occurs, flames are prevented from being further spread to the gas source cavity, and the flames are effectively prevented from being spread back into the hydrogen-oxygen generator; and flame propagation can be effectively blocked under the condition of high-pressure rapid tempering, the anti-tempering effect is improved, and the overall safety performance is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydrogen-oxygen generators, specifically a backfire prevention device for a multifunctional hydrogen-oxygen generator. Background Technology

[0002] Hydrogen, as a high-energy clean energy source, has the characteristics of high calorific value and fast combustion speed. When burning in oxygen or air, the flame spreads extremely quickly and has a very strong penetrating ability. Once a leak occurs and it comes into contact with an open flame, it can be ignited rapidly, and flashback is very likely to occur in pipelines or confined spaces.

[0003] Various types of backfire prevention devices have been used in hydrogen-oxygen generator systems. Commonly used backfire prevention devices mainly include one-way valve type, metal mesh flame arrestor type, liquid seal tank type and their combination structure. The flame arrestor method using the above-mentioned backfire prevention structure is not reliable enough. Under high pressure deflagration or complex airflow disturbance, there is still a risk of flame penetration. Under high pressure rapid backfire, it cannot effectively block flame propagation, resulting in poor backfire prevention effect. Utility Model Content

[0004] The purpose of this invention is to provide a backfire prevention device for a multifunctional hydrogen-oxygen generator, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0005] A backfire prevention device for a multifunctional hydrogen-oxygen generator is provided, comprising a tank body connected to the outlet end of the hydrogen-oxygen generator, an isolation pipe disposed inside the tank body, an outer cavity formed between the isolation pipe and the tank body, an isolation chamber disposed inside the isolation pipe, the isolation chamber being connected to the outer cavity, a back suction component disposed at the upper part of the isolation pipe, the back suction component being connected to the isolation chamber, and a washing medium disposed in both the isolation chamber and the outer cavity.

[0006] Furthermore, air inlets are provided on both sides of the tank body, and the air inlets are connected to the outlet of the hydrogen-oxygen generator. Each air inlet can be connected to the outlet of the hydrogen-oxygen generator, and the gas enters the outer cavity of the tank body from the air inlets on both sides, which facilitates the flow of gas.

[0007] Furthermore, the isolation tube is provided with a number of air guide holes along the circumferential direction. The isolation cavity and the outer cavity are connected through the number of air guide holes. The air guide holes are located in the upper region of the isolation tube, close to the liquid surface, and are evenly distributed along the circumferential direction to guide hydrogen gas into the isolation cavity evenly and prevent concentrated gushing.

[0008] Furthermore, the back-suction assembly includes a suspended tube positioned above the isolation tube. One end of the suspended tube extends into the isolation chamber, and the other end, away from the isolation chamber, extends to the outside of the tank. An outlet is located at the end of the suspended tube away from the isolation chamber. The lower end of the suspended tube (near the isolation chamber) extends above the liquid surface but below the vent hole, ensuring that gas can smoothly enter from above the liquid surface. The upper end of the suspended tube (near the outlet) passes through the top of the tank and extends to the outside of the tank, connecting to the downstream gas-using device. The working mechanism of the back-suction assembly relies on the instantaneous negative pressure created by gas backfire. Under this negative pressure, the washing medium in the isolation chamber is drawn into the suspended tube, increasing the liquid column height and forming a gas-liquid separation zone, effectively preventing the flame from penetrating the pipe and entering the hydrogen-oxygen generator.

[0009] Furthermore, the suspended tube is provided with several suction holes along the circumference. The bottom of the suspended tube is connected to the isolation chamber through several suction holes. When the flame returns, the negative pressure is formed very quickly. By opening several suction holes simultaneously, the washing medium can be quickly sucked in to form a liquid column in the suspended tube. The multi-hole suction method can make the liquid enter the suspended tube more evenly to form a liquid column, quickly suck back the washing medium, and improve the fire extinguishing response speed.

[0010] Furthermore, the washing medium is cooling water, and the temperature of the cooling water is between 5°C and 40°C. As a liquid medium, cooling water has compressibility and buffering effect. It can absorb some of the impact pressure at the moment of deflagration and reduce the local stress in the device. Cooling water itself is not flammable and remains stable in the event of backfire or high temperature environment, and will not cause secondary combustion.

[0011] Furthermore, a safety pressure relief valve is installed on the upper part of the tank. When the internal pressure of the tank exceeds the preset limit, the safety pressure relief valve can automatically open to release excess gas, thereby preventing the tank from bursting or the device from being damaged, and playing a role in pressure safety protection.

[0012] Furthermore, a liquid level observation window is also provided on the upper part of the tank. The liquid level observation window is located on the upper part of the tank, and the corresponding interior is the liquid level of the washing medium in the outer cavity and the isolation cavity, which makes it convenient for the operator to observe the liquid level height inside the tank.

[0013] Furthermore, the bottom of the tank is provided with several injection holes, through which operators can inject washing medium into the internal isolation chamber and the external chamber of the tank. When injection is not required, the injection holes are sealed with stainless steel plugs.

[0014] Furthermore, an isolation plate is provided between the tank and the isolation pipe. The isolation plate has multiple small holes for hydrogen gas to pass through inside the tank, thereby limiting the gas flow rate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] During normal use, the gas generated by the hydrogen-oxygen generator enters the outer cavity inside the tank from the tank body, enters the isolation cavity through the vent at the top of the isolation pipe, and then flows out through the back suction assembly.

[0017] When backfire occurs, the gas in the back-suction assembly explodes. Due to the deflagration characteristics of hydrogen, the back-suction assembly expands instantaneously, creating a negative pressure. This pressure forces the washing medium contained in the isolation pipe into the back-suction assembly. The washing medium is instantly drawn into the back-suction assembly, creating a level difference. The height of the washing medium column in the back-suction assembly rises, forming a liquid seal structure. This seal prevents the backfire flame in the back-suction assembly from communicating with the gas in the tank, thus acting as a flame retardant. It also prevents the flame from further propagating to the gas source cavity, effectively preventing the flame from returning to the hydrogen-oxygen generator. Under high-pressure and rapid backfire conditions, it can effectively block flame propagation, improve the backfire prevention effect, and enhance the overall safety performance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of a backfire prevention device for a multifunctional hydrogen-oxygen generator;

[0020] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the tank provided by this utility model;

[0021] Figure 3 This is a schematic diagram of the back-suction assembly structure provided by this utility model.

[0022] In the diagram: 1. Tank body; 2. Isolation pipe; 21. Air vent; 3. Outer cavity; 4. Isolation cavity; 5. Back suction assembly; 51. Suspension pipe; 511. Suction port; 52. Air outlet; 6. Washing medium; 7. Air inlet; 8. Safety pressure relief valve; 9. Liquid level observation window; 10. Liquid injection hole; 11. Isolation plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0024] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0025] However, there may be instances where unnecessary detailed descriptions are omitted. For example, detailed descriptions of well-known matters or repetitive descriptions of essentially the same structures may be omitted. This is to avoid unnecessarily lengthy descriptions and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this application and are not intended to limit the subject matter of the claims.

[0026] Please see Figure 1-3 As shown in the embodiment of this utility model, a backfire prevention device for a multifunctional hydrogen-oxygen generator includes a tank 1, which is connected to the gas outlet of the hydrogen-oxygen generator. An isolation pipe 2 is provided inside the tank 1, and an outer cavity 3 is formed between the isolation pipe 2 and the tank 1. An isolation chamber 4 is provided inside the isolation pipe 2, and the isolation chamber 4 is connected to the outer cavity 3. A back suction component 5 is provided on the upper part of the isolation pipe 2, and the back suction component 5 is connected to the isolation chamber 4. A washing medium 6 is provided in both the isolation chamber 4 and the outer cavity 3. The back suction component 5 is installed on the upper part of the isolation pipe 2 and is connected to the isolation chamber 4. The back suction component 5 is higher than the liquid level line of the washing medium 6 and is connected to the gas usage end.

[0027] During normal use, the gas generated by the hydrogen-oxygen generator enters the outer cavity 3 inside the tank 1 from the tank 1, enters the isolation cavity 4 through the vent at the top of the isolation pipe 2, and then flows out through the back suction assembly 5.

[0028] When backfire occurs, the hydrogen contained in the back-suction assembly 5 will explode. According to the explosion characteristics of hydrogen, the back-suction assembly 5 will expand instantly, forming a negative pressure. The pressure will squeeze the washing medium 6 contained in the isolation tube 2 into the back-suction assembly 5. The back-suction assembly 5 will instantly draw in and form a liquid level difference, which will prevent the backfire flame in the back-suction assembly 5 from communicating with the hydrogen contained in the tank 1 and play a flame-retardant role.

[0029] At the moment of deflagration, a transient high-pressure-negative pressure fluctuation is formed in the back-suction assembly 5, which draws the washing liquid 6 in the isolation chamber 4 into the back-suction assembly 5, forming a liquid column. This prevents the flame from further propagating back to the tank 1 and reacting with the hydrogen flowing in the tank 1, thus playing a role in flame isolation and retardation. The liquid then falls back into the back-suction assembly 5. The height of the washing medium 6 liquid column in the back-suction assembly 5 increases, forming a liquid seal structure. When flame backpropagation occurs, the liquid seal can block the propagation path of the flame into the tank 1 and the hydrogen source, preventing the flame backfire from causing a deflagration of the gas source. This achieves a rapid and safe flame-retardant and explosion-proof effect. Under high-pressure and rapid backfire conditions, it can effectively block flame propagation, improve the backfire prevention effect, and enhance the overall safety performance.

[0030] In one embodiment, see Figure 1 , Figure 2 and Figure 3 The tank body 1 has air inlets 7 on both sides, which are connected to the outlet of the hydrogen-oxygen generator. Each air inlet 7 can be connected to the outlet of the hydrogen-oxygen generator, and the gas enters the outer cavity 3 of the tank body 1 from the air inlets 7 on both sides.

[0031] In one embodiment, see Figure 1 , Figure 2 and Figure 3 The isolation tube 2 has several gas guide holes 21 arranged along the circumferential direction. The isolation chamber 4 and the outer chamber 3 are connected through several gas guide holes 21. The gas guide holes 21 are located in the upper area of ​​the isolation tube 2, close to the liquid surface, and are evenly distributed along the circumferential direction to guide hydrogen gas into the isolation chamber 4 evenly and prevent concentrated gushing.

[0032] Specifically, please refer to Figure 1 , Figure 2 and Figure 3The back-suction assembly 5 includes a suspended pipe 51, which is positioned above the isolation pipe 2. One end of the suspended pipe 51 extends into the isolation chamber 4, and the other end of the suspended pipe 51, away from the isolation chamber 4, extends to the outside of the tank body 1. An outlet 52 is provided at the end of the suspended pipe 51 away from the isolation chamber 4. The lower end of the suspended pipe 51 (the end closer to the isolation chamber 4) extends above the liquid surface but below the position of the air guide hole 21 to ensure that the gas can smoothly enter from above the liquid surface. The upper end of the suspended pipe 51 (the end closer to the outlet 52) ​​passes through the top of the tank body 1 and extends to the outside of the tank body 1, connecting to the downstream gas usage device. The working mechanism of the back-suction assembly 5 relies on the instantaneous formation of negative pressure during gas backfire. Under the action of negative pressure, the washing medium 6 in the isolation chamber 4 is drawn into the interior of the suspended pipe 51, the liquid column height increases, forming a gas-liquid separation zone, effectively preventing the flame from penetrating the pipe and entering the hydrogen-oxygen generator.

[0033] Further, please refer to Figure 1 , Figure 2 and Figure 3 The suspended tube 51 is provided with several suction holes 511 along the circumference. The bottom of the suspended tube 51 is connected to the isolation chamber 4 through several suction holes 511. When the flame returns, the negative pressure is formed very quickly. By opening several suction holes 511 at the same time, the washing medium can be quickly sucked into the suspended tube 51 to form a liquid column. The multi-hole suction method can make the liquid enter the suspended tube 51 more evenly to form a liquid column, quickly suck back the washing medium 6, improve the fire extinguishing response speed, block the flame propagation path, realize gas-liquid isolation protection, and improve the backfire prevention response speed of the device.

[0034] Please see Figure 1 , Figure 2 and Figure 3 The washing medium 6 is cooling water, and the temperature of the cooling water is between 5°C and 40°C. As a liquid medium, the cooling water is compressible and has a buffering effect. It can absorb some of the impact pressure at the moment of deflagration and reduce the local stress in the device. The cooling water itself is not flammable and remains stable in the event of backfire or high temperature, and will not cause secondary combustion.

[0035] Further, please refer to Figure 1 and Figure 2 As shown, a safety relief valve 8 is installed on the upper part of the tank 1. When the internal pressure of the tank 1 exceeds the preset limit, the safety relief valve 8 can automatically open to release excess gas, thereby preventing the tank 1 from bursting and the device from being damaged, and playing a role in pressure safety protection.

[0036] Further, please refer to Figure 1 and Figure 2 As shown, a liquid level observation window 9 is also provided on the upper part of the tank body 1. The liquid level observation window 9 is located on the upper part of the tank body 1 (close to the liquid level height). The corresponding interior is the liquid level of the washing medium 6 in the outer cavity 3 and the isolation cavity 4, which makes it convenient for the operator to observe the liquid level height inside the tank body 1.

[0037] Further, please refer to Figure 1 and Figure 2 As shown, the bottom of the tank body 1 is also provided with several injection holes 10. Operators can use the injection holes 10 to inject washing medium 6 into the internal isolation chamber 4 and the external chamber 3 of the tank body 1. When injection is not required, the injection holes 10 are sealed with stainless steel plugs.

[0038] Further, please refer to Figure 1 and Figure 2 As shown, an isolation plate 11 is also provided between the tank 1 and the isolation pipe 2. The isolation plate 11 has multiple small holes (not shown in the figure) for hydrogen gas flowing inside the tank 1 to pass through, thereby limiting the flow rate of the gas.

[0039] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A backfire prevention device for a multifunctional hydrogen-oxygen generator, comprising a tank (1), wherein the tank (1) is connected to the outlet end of the hydrogen-oxygen generator, characterized in that, The tank (1) is provided with an isolation tube (2), and an outer cavity (3) is formed between the isolation tube (2) and the tank (1). An isolation chamber (4) is provided inside the isolation tube (2), and the isolation chamber (4) is connected to the outer cavity (3). A back suction component (5) is provided on the upper part of the isolation tube (2), and the back suction component (5) is connected to the isolation chamber (4). A washing medium (6) is provided in both the isolation chamber (4) and the outer cavity (3).

2. The anti-backfire device for a multifunctional hydrogen-oxygen generator according to claim 1, characterized in that, The tank (1) has air inlets (7) on both sides, and the air inlets (7) are connected to the outlet of the hydrogen-oxygen generator.

3. The anti-backfire device for a multifunctional hydrogen-oxygen generator according to claim 2, characterized in that, The isolation tube (2) has several air guide holes (21) arranged along the circumferential direction, and the isolation cavity (4) and the outer cavity (3) are connected through several air guide holes (21).

4. The anti-backfire device for a multifunctional hydrogen-oxygen generator according to claim 1, characterized in that, The back suction assembly (5) includes a suspended tube (51) which is disposed above the isolation tube (2). One end of the suspended tube (51) extends into the isolation chamber (4), and the other end of the suspended tube (51) away from the isolation chamber (4) extends to the outside of the tank body (1). An air outlet (52) is provided at the other end of the suspended tube (51) away from the isolation chamber (4).

5. The anti-backfire device for a multifunctional hydrogen-oxygen generator according to claim 4, characterized in that, The suspended tube (51) is provided with a number of suction holes (511) along the circumferential direction, and the bottom of the suspended tube (51) is connected to the isolation chamber (4) through the number of suction holes (511).

6. The backfire prevention device for a multifunctional hydrogen-oxygen generator according to claim 1, characterized in that, The washing medium (6) is cooling water.

7. A backfire prevention device for a multifunctional hydrogen-oxygen generator according to claim 6, characterized in that, A safety pressure relief valve (8) is provided on the upper part of the tank (1).

8. The backfire prevention device for a multifunctional hydrogen-oxygen generator according to claim 1, characterized in that, The bottom of the tank (1) is also provided with a liquid level observation window (9).

9. A backfire prevention device for a multifunctional hydrogen-oxygen generator according to claim 1, characterized in that, The bottom of the tank (1) is also provided with several injection holes (10).

10. A backfire prevention device for a multifunctional hydrogen-oxygen generator according to claim 1, characterized in that, An isolation plate (11) is also provided between the tank (1) and the isolation pipe (2).

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