Combustor with backfire prevention

Abstract

The utility model relates to burner technical field and disclose a kind of burner with anti-backfire, comprising: burner mounting frame, combustion fire frame, flame separation guide frame, flame separation hole and combustion lighter device, the top inner side of burner mounting frame is fixedly connected with combustion fire frame, the inner side of combustion fire frame is fixedly connected with flame separation guide frame, the top surface of flame separation guide frame is equipped with flame separation hole, the side of burner mounting frame is equipped with mounting hole, the inner side of mounting hole is fixedly connected with combustion lighter device, the side of combustion fire frame is fixedly connected with combustion lighter device, the bottom surface of combustion fire frame is fixedly connected with gas connection pipe;Backfire gas breaking assembly is set on the side of gas connection pipe;Anti-backfire assembly is set in the inner side of gas connection pipe;Communication air intake component is set on the bottom surface of gas connection pipe, the utility model is optimized by double protection component and structure, improves anti-backfire reliability, and safety and efficiency are considered, and it is widely applicable.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, specifically to a burner with backfire prevention. Background Technology

[0002] In fields such as industrial heating, energy supply, and residential gas, burners are the core equipment for energy conversion, and their safety and stability are directly related to production operations and personnel safety. However, during operation, burners are prone to backfire due to factors such as an imbalance in the gas-air mixing ratio, excessively fast flame propagation speed, and sudden pressure changes in the combustion chamber. This backfire phenomenon occurs when the flame propagates backward into the gas pipeline or valve, leading to pipeline explosions, equipment damage, or even personal injury. It is one of the most common safety hazards in combustion systems.

[0003] While existing burners are equipped with basic flameout protection devices, their ability to prevent backfire is limited: some products only monitor the flame status through a single flame sensor, making it difficult to respond quickly in the early stages of backfire; others use mechanical check valves to block gas backflow, but due to their rigid structure and delayed response, they cannot adapt to instantaneous pressure fluctuations under complex operating conditions, still leaving safety loopholes. At the same time, traditional backfire prevention structures are mostly fixed designs, making it difficult to flexibly adjust the protection intensity according to parameters such as gas type and combustion load. This leads to over-protection affecting combustion efficiency during low-load operation, while insufficient protection poses a risk during high-load operation. Therefore, we propose a burner with backfire prevention. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a burner with anti-backfire function, which solves the above-mentioned problems.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] 2. A burner with backfire prevention, comprising a combustion ignition device, characterized in that it further comprises:

[0007] The burner mounting frame includes a combustion flame frame, a flame distribution guide frame, and flame distribution holes. The combustion flame frame is fixedly connected to the top inner side of the burner mounting frame. The combustion flame frames are linearly and equidistantly distributed on the inner side of the burner mounting frame. The flame distribution guide frame is fixedly connected to the inner side of the combustion flame frame. The flame distribution holes are formed on the top surface of the flame distribution guide frame and are rectangularly and equidistantly distributed on the top surface of the flame distribution guide frame. The side of the burner mounting frame has mounting holes through which the combustion ignition device is fixed. The side of the combustion flame frame is fixedly connected to the combustion ignition device. The bottom surface of the combustion flame frame is fixedly connected to a gas connection pipe.

[0008] A backfire shut-off assembly is provided on the side of the gas connection pipe, and a backfire shut-off pipe is fixedly connected to the side of the gas connection pipe. A backfire shut-off assembly is provided on the inner side of the backfire shut-off pipe.

[0009] A backfire prevention component is provided inside the gas connection pipe, and a backfire support platform is fixedly connected to the inside of the gas connection pipe. The backfire prevention component is provided on the top surface of the backfire support platform.

[0010] A connecting air intake assembly installed at the bottom of the gas connection pipe.

[0011] Preferably, the side of the combustion frame has equally spaced mounting holes, and an ignition connection check valve is fixedly connected to the inside of the mounting holes. The ignition connection check valve is fixedly connected to the combustion ignition device, and the ignition connection check valve is used to provide one-way communication between the combustion ignition device and the combustion frame.

[0012] Preferably, the backfire prevention assembly includes a backfire support platform, a backfire protection spring, and a backfire protection slider. The backfire support platform is fixedly connected to the inner side of the gas connection pipe, the backfire protection spring is fixedly connected to the inner side of the backfire support platform, the backfire protection slider is fixedly connected to the top surface of the backfire protection spring, and the backfire protection slider is slidably connected to the inner side of the gas connection pipe.

[0013] Preferably, the inner side of the tempering support platform is provided with a gas communication hole, and the top surface of the tempering protection slider is provided with a conical communication hole, which is distributed in a ring at equal intervals on the top surface of the tempering protection slider.

[0014] Preferably, the connecting air intake assembly includes a gas supply assembly and a connecting solenoid valve. The bottom surface of the gas connection pipe is fixedly connected to the gas supply assembly, the side surface of the gas supply assembly is fixedly connected to the connecting solenoid valve, the inner bottom surface of the burner mounting frame is fixedly connected to the gas supply assembly, and the side surface of the burner mounting frame is fixedly connected to the connecting solenoid valve.

[0015] Preferably, the backfire shut-off assembly includes an electrically connected thermal fuse, the backfire shut-off pipe is fixedly connected to the side of the gas connection pipe, and an electrically connected thermal fuse is fixedly connected to the inside of the backfire shut-off pipe.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] A burner with backfire prevention is provided, which has the following beneficial effects:

[0018] This invention utilizes the cooperation between the tapered connecting hole of the flashback protection slider in the flashback protection assembly and the flashback protection spring. When flashback occurs, the reverse airflow pressure pushes the slider to close the gas connection pipe, quickly blocking the flame propagation path. The flashback gas cutoff assembly, through the electrical connection thermal fuse in the flashback gas cutoff pipe, immediately triggers the solenoid valve to cut off the gas supply upon detecting flashback, forming a double safety protection. At the same time, the ignition connection check valve prevents the flame from flashing back into the ignition device, and the flame distribution holes of the flame distribution guide frame optimize the combustion distribution to reduce flashback induction factors. The overall structure, through the synergistic effect of multiple components, significantly improves the flashback protection reliability of the burner, balancing safety protection and combustion efficiency, and is suitable for various gas operating conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram showing the overall structure of this utility model disassembled;

[0021] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0022] Figure 4 for Figure 3 A magnified view of part A in the diagram.

[0023] In the diagram: 1. Burner mounting frame; 2. Combustion flame frame; 3. Flame distribution guide frame; 4. Flame distribution hole; 5. Combustion ignition device; 6. Mounting hole; 7. Gas supply assembly; 8. Connecting solenoid valve; 9. Ignition connecting one-way valve; 10. Backfire support platform; 11. Backfire protection spring; 12. Backfire protection slider; 13. Electrical connection thermal fuse; 14. Backfire gas shut-off pipe; 15. Connecting gas port; 16. Gas connection pipe; 17. Conical connecting hole. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-4 This utility model provides a technical solution:

[0026] 3. A burner with backfire prevention, comprising a combustion ignition device 5, characterized in that it further comprises:

[0027] The burner mounting frame 1, the combustion fire frame 2, the flame distribution guide frame 3, and the flame distribution hole 4 are provided. The combustion fire frame 2 is fixedly connected to the top inner side of the burner mounting frame 1. The combustion fire frame 2 is linearly and equidistantly distributed on the inner side of the burner mounting frame 1. The flame distribution guide frame 3 is fixedly connected to the inner side of the combustion fire frame 2. The flame distribution hole 4 is opened on the top surface of the flame distribution guide frame 3. The flame distribution hole 4 is rectangularly and equidistantly distributed on the top surface of the flame distribution guide frame 3. The side of the burner mounting frame 1 is provided with a mounting hole 6. The combustion ignition device 5 is fixedly connected to the side of the combustion fire frame 2. The bottom surface of the combustion fire frame 2 is fixedly connected with a gas connection pipe 16.

[0028] A flashback cutoff assembly is provided on the side of the gas connection pipe 16, and a flashback cutoff pipe 14 is fixedly connected to the side of the gas connection pipe 16. A flashback cutoff assembly is provided on the inner side of the flashback cutoff pipe 14.

[0029] A backfire prevention component is provided inside the gas connection pipe 16, and a backfire support platform 10 is fixedly connected to the inside of the gas connection pipe 16. A backfire prevention component is provided on the top surface of the backfire support platform 10.

[0030] A connecting air intake assembly is installed on the bottom surface of the gas connection pipe 16.

[0031] Furthermore, the side of the combustion frame 2 is provided with equally spaced mounting holes, and an ignition connection check valve 9 is fixedly connected to the inside of the mounting holes. The ignition connection check valve 9 is fixedly connected to the combustion ignition device 5, and the ignition connection check valve 9 is used to provide one-way communication between the combustion ignition device 5 and the combustion frame 2.

[0032] Furthermore, the backfire prevention assembly includes a backfire support platform 10, a backfire protection spring 11, and a backfire protection slider 12. The backfire support platform 10 is fixedly connected to the inside of the gas connection pipe 16, the backfire protection spring 11 is fixedly connected to the inside of the backfire support platform 10, the backfire protection slider 12 is fixedly connected to the top surface of the backfire protection spring 11, and the backfire protection slider 12 is slidably connected to the inside of the gas connection pipe 16.

[0033] Furthermore, the inner side of the flashback support platform 10 is provided with a gas communication hole 15, and the top surface of the flashback protection slider 12 is provided with a conical communication hole 17. The conical communication holes 17 are distributed in a ring at equal intervals on the top surface of the flashback protection slider 12. Through the action of the anti-flashback component, when flashback occurs, due to the structure of the conical communication hole 17, the flashback compresses the flashback protection slider 12, realizing the contact between the flashback support platform 10 and the flashback protection slider 12, thereby sealing the gas connection pipe 16 to prevent flashback.

[0034] Furthermore, the connecting air intake assembly includes an air supply assembly 7 and a connecting solenoid valve 8. The bottom surface of the gas connection pipe 16 is fixedly connected to the air supply assembly 7, the side surface of the air supply assembly 7 is fixedly connected to the connecting solenoid valve 8, the inner bottom surface of the burner mounting frame 1 is fixedly connected to the air supply assembly 7, and the side surface of the burner mounting frame 1 is fixedly connected to the connecting solenoid valve 8.

[0035] Furthermore, the backfire gas shut-off assembly includes an electrical connection thermal fuse 13, a backfire gas shut-off pipe 14 fixedly connected to the side of the gas connection pipe 16, and an electrical connection thermal fuse 13 fixedly connected to the inside of the backfire gas shut-off pipe 14. Through the action of the backfire gas shut-off assembly, when backfire occurs, the gas connection pipe 16 is sealed, and the backfire flows to the inside of the backfire gas shut-off pipe 14, causing the electrical connection thermal fuse 13 to melt and break, thereby disconnecting the solenoid valve 8 and achieving gas shut-off.

[0036] Structural Description:

[0037] Burner mounting frame 1: As the mounting base of the overall structure, the combustion frame 2 is fixed on the inner top side, and the side has mounting holes 6 for installing the combustion ignition device 5. The gas supply assembly 7 is fixed on the inner bottom surface, which serves to support and fix the various components.

[0038] Combustion frame 2: It is linearly and equidistantly distributed inside the burner mounting frame 1. The flame distribution guide frame 3 is fixed inside, the combustion ignition device 5 is connected to the side, and the gas connection pipe 16 is fixed on the bottom. It is the main space for gas combustion.

[0039] Flame distribution guide frame 3: Fixed inside the combustion fire frame 2, with rectangular equidistant flame distribution holes 4 on the top surface, used to evenly disperse the flame and optimize the combustion distribution;

[0040] Flame distribution holes 4: are opened on the top surface of the flame distribution guide frame 3, and are distributed in a rectangular and equidistant manner. They can disperse the flame, reduce local high temperature, and reduce the risk of backfire.

[0041] Combustion ignition device 5: fixed inside the mounting hole 6 and on the side of the combustion flame frame 2, and connected to the combustion flame frame 2 through the ignition connecting one-way valve 9, used to ignite the gas;

[0042] Mounting hole 6: is provided on the side of the burner mounting frame 1 to provide an installation position for the combustion ignition device 5;

[0043] Gas transmission assembly 7: fixed to the bottom surface of gas connection pipe 16 and the inner bottom surface of burner mounting frame 1, and connected to solenoid valve 8 on the side, responsible for transmitting gas;

[0044] Connecting solenoid valve 8: Connected to the side of gas supply assembly 7 and burner mounting frame 1, it can control the opening and closing of the gas passage and cut off the gas supply in case of backfire.

[0045] Ignition connection one-way valve 9: fixed inside the mounting hole on the side of the combustion frame 2, the inside is connected to the combustion ignition device 5, realizing one-way communication between the combustion ignition device 5 and the combustion frame 2, preventing the flame from rushing back into the ignition device.

[0046] Backfire support platform 10: fixed to the inside of the gas connection pipe 16, with a gas connection hole 15 on the inside and a backfire prevention component on the top surface, providing support and installation base for the backfire protection slider 12;

[0047] The flashback protection spring 11 is fixed inside the flashback support platform 10 and connected to the flashback protection slider 12 on its top surface. It provides the slider with a reset spring force and keeps the slider in the upper position to conduct gas during normal combustion.

[0048] Backfire protection slider 12: It is slidably connected to the inside of the gas connection pipe 16. The top surface is provided with annularly distributed conical connecting holes 17, and the bottom surface is connected to the backfire protection spring 11. When backfire occurs, it can move down under pressure to close the connecting gas hole 15.

[0049] Electrically connected thermal fuse 13: fixed inside the tempering gas cut-off pipe 14, and electrofused to the connecting solenoid valve 8. It will be melted during tempering, thereby triggering the solenoid valve to cut off the gas source.

[0050] Backfire shut-off pipe 14: fixed to the side of gas connection pipe 16, with an electrical connection thermal fuse 13 installed on the inside to provide a flow channel for backfire, so that the electrical connection thermal fuse 13 can detect backfire;

[0051] Gas connection hole 15: It is opened inside the tempering support platform 10 for gas flow, and can be closed by the tempering protection slider 12 during tempering.

[0052] Gas connection pipe 16: connected to the bottom of the combustion flame frame 2, with an anti-backfire component installed on the inside, a backfire shut-off pipe 14 connected to the side, and a gas transmission assembly 7 connected to the bottom, serving as the channel for gas transmission.

[0053] Conical connecting holes 17: are opened on the top surface of the flashback protection slider 12, and are distributed in a ring at equal intervals. The cross section is conical. Normally, the gas flows through, and during flashback, the reverse airflow pressure can be gathered to push the slider down.

[0054] Working principle: When this utility model is needed, the gas supply assembly 7 supplies gas to the gas connection pipe 16 through the solenoid valve 8. The gas enters the combustion frame 2 through the gas connection hole 15 of the flashback support platform 10 and the conical connection hole 17 of the flashback protection slider 12. The combustion ignition device 5 ignites the gas through the ignition connection one-way valve 9. The flame distribution hole 4 of the flame distribution guide frame 3 evenly distributes the flame to ensure stable combustion. At this time, the flashback protection slider 12 is in the upper position under the support of the flashback protection spring 11. The conical connection hole 17 is aligned with the gas connection hole 15 to ensure smooth gas flow. When flashback occurs, the reverse flame airflow impacts the flashback protection slider 12. The cross-sectional characteristics of the conical connection hole 17 converge the pressure, pushing the slider to overcome the elastic force of the flashback protection spring 11 and move downward until the slider... The bottom surface of the block fits tightly against the top surface of the flashback support platform 10, sealing the gas connection hole 15 and quickly blocking the path of the flame propagating backward along the gas connection pipe 16. At the same time, some of the flashback flame will flow in through the flashback gas cut-off pipe 14 on the side of the gas connection pipe 16, triggering the inner electrical connection thermal fuse 13 to melt. This device is electrofused to the solenoid valve 8. After melting, the power supply to the solenoid valve is immediately cut off, causing the gas supply assembly 7 to stop supplying gas, forming a secondary safety protection. The ignition connection check valve 9 prevents the flame from rushing backward into the combustion ignition device 5, avoiding the spread of the fire source. After the flashback is eliminated, the flashback protection slider 12 is reset under the action of the flashback protection spring 11, and the gas passage is reopened. After the melted electrical connection thermal fuse 13 is replaced and the solenoid valve 8 is restarted, the burner can resume normal operation.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A burner with backfire prevention, comprising, The combustion ignition device (5) is characterized in that it further includes: The burner mounting frame (1), the combustion fire frame (2), the flame distribution guide frame (3), and the flame distribution hole (4) are provided. The combustion fire frame (2) is fixedly connected to the top inner side of the burner mounting frame (1). The combustion fire frame (2) is linearly and equidistantly distributed on the inner side of the burner mounting frame (1). The flame distribution guide frame (3) is fixedly connected to the inner side of the combustion fire frame (2). The flame distribution hole (4) is opened on the top surface of the flame distribution guide frame (3). The flame distribution hole (4) is rectangularly and equidistantly distributed on the top surface of the flame distribution guide frame (3). The side of the burner mounting frame (1) is provided with a mounting hole (6). The combustion ignition device (5) is fixed through the mounting hole (6). The side of the combustion fire frame (2) is fixedly connected to the combustion ignition device (5). The bottom surface of the combustion fire frame (2) is fixedly connected to a gas connection pipe (16). A flashback gas cutoff assembly is provided on the side of the gas connection pipe (16), and a flashback gas cutoff pipe (14) is fixedly connected to the side of the gas connection pipe (16). A flashback gas cutoff assembly is provided on the inner side of the flashback gas cutoff pipe (14). A backfire prevention assembly is provided inside the gas connection pipe (16), and a backfire support platform (10) is fixedly connected to the inside of the gas connection pipe (16). The backfire prevention assembly is provided on the top surface of the backfire support platform (10). A connecting air intake assembly is installed on the bottom surface of the gas connection pipe (16).

2. A burner with backfire prevention according to claim 1, characterized in that, The side of the combustion frame (2) is provided with equally spaced mounting holes. An ignition connection check valve (9) is fixedly connected to the inside of the mounting holes. The ignition connection check valve (9) is fixedly connected to the combustion ignition device (5). The ignition connection check valve (9) is used to provide one-way communication between the combustion ignition device (5) and the combustion frame (2).

3. A burner with backfire prevention according to claim 1, characterized in that, The backfire prevention assembly includes a backfire support platform (10), a backfire protection spring (11), and a backfire protection slider (12). The backfire support platform (10) is fixedly connected to the inner side of the gas connection pipe (16). The backfire protection spring (11) is fixedly connected to the inner side of the backfire support platform (10). The backfire protection slider (12) is fixedly connected to the top surface of the backfire protection spring (11). The backfire protection slider (12) is slidably connected to the inner side of the gas connection pipe (16).

4. A burner with backfire prevention according to claim 3, characterized in that, The inner side of the tempering support platform (10) is provided with a gas communication hole (15), and the top surface of the tempering protection slider (12) is provided with a conical communication hole (17). The conical communication holes (17) are distributed in a ring at equal intervals on the top surface of the tempering protection slider (12).

5. A burner with backfire prevention according to claim 3, characterized in that, The connecting air intake assembly includes a gas supply assembly (7) and a connecting solenoid valve (8). The bottom surface of the gas connection pipe (16) is fixedly connected to the gas supply assembly (7), the side surface of the gas supply assembly (7) is fixedly connected to the connecting solenoid valve (8), the bottom surface of the burner mounting frame (1) is fixedly connected to the gas supply assembly (7), and the side surface of the burner mounting frame (1) is fixedly connected to the connecting solenoid valve (8).

6. A burner with backfire prevention according to claim 1, characterized in that, The backfire gas shut-off assembly includes an electrically connected thermal fuse (13), the side of the gas connection pipe (16) is fixedly connected to the backfire gas shut-off pipe (14), and the inside of the backfire gas shut-off pipe (14) is fixedly connected to the electrically connected thermal fuse (13).

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