Combustor with tempering avoidance structure

Abstract

The utility model relates to burner technical field, concretely relates to a burner with backfire avoidance structure, including burner main part, the one side fixed connection of burner main part has the cannon barrel, the inside of burner main part is provided with the steady flame disc, and the steady flame disc is fixedly installed with the igniter needle and the spray gun, and the end of igniter needle far away from the steady flame disc and the end of spray gun far away from the steady flame disc can slide and extend out of burner main part. Through the first displacement mechanism cooperation power piece drive steady flame disc, igniter needle and spray gun far away from cannon barrel, quickly evacuate combustion chamber and peripheral high temperature area, avoid backfire flame direct contact igniter needle and oil nozzle, prevent igniter needle electrode oxidation failure, oil nozzle fuel passage coking block, solved the burner combustion chamber and the flow through cavity intercommunication, the cavity residual gas is easy because high temperature backfire when stop using, if fuel spray gun, igniter needle and steady flame disc have not evacuated, can cause igniter needle failure, oil nozzle block technical problem.

Description

Technical Field

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

[0002] The primary function of a burner is to thoroughly mix fuel and air and burn them under appropriate conditions to release heat energy. The most basic function of a burner is to ensure that fuel and air are mixed sufficiently and uniformly. The mixing ratio of fuel to air directly affects the efficiency and effect of combustion. The burner also needs to ensure the stability of the combustion process, preventing flame extinction or instability. Furthermore, the burner can control the combustion rate by adjusting the supply of fuel and air. Finally, the burner must ensure the safety of the combustion process, including preventing potential hazards such as gas leakage, backfire, and overheating.

[0003] Chinese Patent Publication No. CN107975796A discloses a burner comprising: a tubular diffuser wall; a gas mixture inlet channel in the diffuser wall; and a distribution baffle having distribution openings forming a central channel segment and a plurality of peripheral channel segments, the peripheral channel segments being radially or branching in shape, the peripheral channel segments extending from the central channel segment toward the diffuser wall, and wherein the peripheral channel segments and the central channel segment are connected together to form a single hole;

[0004] The aforementioned patent mentions that the combustion chamber and flow chamber of the burner are connected, and high-temperature humidified air and fuel are mixed and burned in the combustion chamber. When the burner stops working, the high-temperature flue gas or unburned mixture remaining in the combustion chamber can easily cause backfire due to excessively high local temperatures. That is, the flame runs back along the fuel injection direction to the fuel injection end. If the fuel injector, ignition needle, and flame stabilizer plate remain in or near the high-temperature area of ​​the combustion chamber, the electrode material of the ignition needle is sensitive to temperature, and high temperatures can easily cause its electrode to oxidize and fail, thus affecting subsequent ignition performance. If the fuel injector directly contacts the backfire flame, it is easy to cause fuel coking due to local overheating, resulting in fuel passage blockage and damage to fuel injection function. Therefore, we propose a burner with a backfire avoidance structure. Utility Model Content

[0005] To address the aforementioned issues, a burner with a backfire avoidance structure is provided. Through a first displacement mechanism and a power component, the stabilizing plate, ignition needle, and injector are driven away from the barrel, quickly retracting from the combustion chamber and surrounding high-temperature areas. This prevents backfire flames from directly contacting the ignition needle and injector, thus preventing ignition needle electrode oxidation and failure, and fuel injector channel coking and blockage. This solves the technical problem that when the burner's combustion chamber and flow chamber are connected, residual gas in the chamber is prone to backfire due to high temperatures when the burner is shut down. Furthermore, if the fuel injector, ignition needle, and stabilizing plate are not removed, it can lead to ignition needle failure and injector blockage.

[0006] To address the problems of existing technologies, this utility model provides a burner with a backfire avoidance structure, comprising a burner body, a barrel fixedly connected to one side of the burner body, a fire stabilizing plate disposed inside the burner body, an ignition needle and a spray gun fixedly mounted on the fire stabilizing plate, the end of the ignition needle away from the fire stabilizing plate and the end of the spray gun away from the fire stabilizing plate being slidably extended out of the burner body, a baffle plate disposed between the burner body and the barrel and the fire stabilizing plate; a first displacement mechanism for supporting the movement of the fire stabilizing plate to move away from the barrel is disposed between the burner body and the fire stabilizing plate; a second displacement mechanism for supporting the fire baffle plates to move closer together and splice.

[0007] Preferably, a storage groove is provided on the side of the burner body near the baffle plate, the storage groove is slidably engaged with the baffle plate, and a power component is fixedly installed on the burner body, the power component is used to provide power for the operation of the first displacement mechanism and the operation of the second displacement mechanism.

[0008] Preferably, the first displacement mechanism includes a first bevel gear assembly, a screw, and a first connecting pipe; the first bevel gear assembly is rotatably mounted on the burner body, and the working end of the first bevel gear assembly is fixedly connected to the output end of the power component; the screw is rotatably mounted on the burner body, and the screw is fixedly connected to the working end of the first bevel gear assembly away from the power component; the first connecting pipe is threadedly connected to the screw, and the first connecting pipe is fixedly connected to the flame stabilizer plate.

[0009] Preferably, the first displacement mechanism further includes a first guide assembly, which is used to assist the flame stabilizer plate in linear movement. The first guide assembly includes a connecting block, a slide rod, and a support plate. The connecting block is fixedly connected to the burner body. The slide rod can slide through the left and right sides of the connecting block. The support plate is fixedly connected to the ignition needle and the spray gun. The side of the support plate near the burner body is fixedly connected to one end of the slide rod.

[0010] Preferably, the second displacement mechanism includes a transmission component, a second guide component, and a control component; the transmission component is disposed on the burner body and the power component, and is used to uniformly transmit the rotational power of the power component; the second guide component is disposed on the burner body and the baffle plate, and is used to assist the baffle plate in linear movement; the control component is disposed between the transmission component and the second guide component, and is used to control the movement speed of the baffle plate.

[0011] Preferably, the transmission assembly includes a second bevel gear assembly, a gear disc, a gear ring, and a third bevel gear assembly; the second bevel gear assembly is rotatably mounted on the burner body, and the working end of the second bevel gear assembly is fixedly connected to the output end of the power component away from the first bevel gear assembly; the gear disc is rotatably mounted on the burner body, and the gear disc on one side of the burner body is fixedly connected to the output end of the second bevel gear assembly away from the power component; the gear ring is rotatably mounted on the burner body and meshes with the gear disc; the third bevel gear assembly is rotatably mounted on the burner body, and the working end of the third bevel gear assembly is fixedly connected to the gear disc.

[0012] Preferably, the second guide assembly includes a second connecting pipe and a slide groove; the second connecting pipe is fixedly connected to one side of the fire baffle; the slide groove is opened on the side of the burner body near the second connecting pipe, and the slide groove slides in cooperation with the second connecting pipe.

[0013] Preferably, the control component includes a connecting rod, a slider, a first curved groove, and a second curved groove; the connecting rod is disposed in the groove, one end of the connecting rod is slidably inserted into the connecting pipe, and the connecting rod is fixedly connected to the burner body; the slider is fixedly connected to the end of the connecting rod near the connecting pipe; the first curved groove is opened on the inner side of the second connecting pipe, and the first curved groove is slidably engaged with the slider; the second curved groove is opened on the side of the second connecting pipe near the first curved groove, and the second curved groove is connected to the first curved groove.

[0014] The advantages of this utility model compared to the prior art are:

[0015] 1. The first displacement mechanism, in conjunction with the power component, drives the stabilizing plate, ignition needle, and spray gun away from the barrel, quickly removing them from the combustion chamber and surrounding high-temperature areas. This prevents backfire flames from directly contacting the ignition needle and fuel injector, thus preventing ignition needle electrode oxidation failure and fuel injector fuel passage coking blockage. This solves the technical problem that when the burner combustion chamber and flow chamber are connected, residual gas in the chamber is prone to backfire due to high temperature when the burner is not in use. If the fuel spray gun, ignition needle, and stabilizing plate are not removed, it will lead to ignition needle failure and fuel injector blockage.

[0016] 2. By using a second displacement mechanism in conjunction with a power component to drive the fire baffle plate out of the storage slot and complete the splicing, the connection between the barrel channel and the combustion chamber can be directly blocked, enhancing the redundancy of backfire protection. This solves the technical problem that the burner's combustion chamber and flow chamber are connected, lacking a physical barrier to further intercept backfire, making it impossible to form multiple protections and completely avoid the risk of backfire. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the burner body, barrel, and connecting structure of a burner with a backfire avoidance structure.

[0018] Figure 2This is a three-dimensional schematic diagram of the ignition needle and spray gun and their connection structure of a burner with a backfire avoidance structure.

[0019] Figure 3 This is a three-dimensional schematic diagram of a burner with a backfire avoidance structure, including a fire baffle plate, a first conical tooth assembly, and their connection structure.

[0020] Figure 4 This is a three-dimensional schematic diagram of the second connecting pipe and connecting rod of a burner with a backfire avoidance structure and their connection structure.

[0021] Figure 5 This is a three-dimensional schematic diagram of a burner with a backfire avoidance structure, including the fire baffle, power components, and their connection structure.

[0022] Figure 6 This is a three-dimensional schematic diagram of the connecting rod and slider of a burner with a backfire avoidance structure and their connection structure.

[0023] Figure 7 It is a burner with a backfire avoidance structure. Figure 5 Enlarged diagram of point A in the middle.

[0024] Figure 8 It is a burner with a backfire avoidance structure. Figure 5 Enlarged diagram of point B in the middle.

[0025] The following components are labeled in the diagram: 1. Burner body; 11. Cannon barrel; 12. Flame stabilizer plate; 13. Ignition needle; 14. Spray gun; 2. Flame baffle; 21. Storage slot; 22. Power component; 23. First bevel gear assembly; 24. Screw; 25. First connecting pipe; 26. Connecting block; 27. Slide rod; 28. Support plate; 29. ​​Second bevel gear assembly; 210. Gear disc; 211. Gear ring; 212. Third bevel gear assembly; 213. Second connecting pipe; 214. Slide groove; 215. Connecting rod; 216. Slider; 217. First curved groove; 218. Second curved groove. Detailed Implementation

[0026] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0027] See Figures 1-3As shown, a burner with a backfire avoidance structure includes a burner body 1, a barrel 11 fixedly connected to one side of the burner body 1, a stabilizing plate 12 disposed inside the burner body 1, an ignition needle 13 and a spray gun 14 fixedly mounted on the stabilizing plate 12, the end of the ignition needle 13 away from the stabilizing plate 12 and the end of the spray gun 14 away from the stabilizing plate 12 being slidably extended out of the burner body 1, a baffle plate 2 disposed between the burner body 1 and the barrel 11 and the stabilizing plate 12; a first displacement mechanism for supporting the movement of the stabilizing plate 12 to move away from the barrel 11 is disposed between the burner body 1 and the stabilizing plate 12; a second displacement mechanism for supporting the baffle plate 2 to move closer together is disposed between the burner body 1 and the baffle plate 2; a receiving groove 21 is opened on the side of the burner body 1 near the baffle plate 2, the receiving groove 21 slidingly engaging with the baffle plate 2; a power component 22 is fixedly mounted on the burner body 1, the power component 22 being used to provide power for the operation of the first displacement mechanism and the operation of the second displacement mechanism.

[0028] Specifically, the ignition needle 13 and the spray gun 14 are fixedly connected to the flexible spring connecting tube. The fire baffle 2 is preferably made of aluminum silicate fiber. The fire baffle 2 and the receiving groove 21 form a sliding guide pair. The power component 22 is preferably a dual-axis servo motor.

[0029] When the burner is put into use, the barrel 11 is fixed to the end face of the rotary kiln. Even if the burner stops working, there is no need to remove the burner body 1. When the burner stops working, the power unit 22 is started. The output ends on both sides of the power unit 22 drive the first displacement mechanism and the second displacement mechanism to operate respectively.

[0030] When the first displacement mechanism is running, it can drive the stabilizing plate 12 to move away from the barrel 11. At this time, the stabilizing plate 12 simultaneously drives the ignition needle 13 and the spray gun 14 away from the barrel 11, so that the stabilizing plate 12, the ignition needle 13 and the spray gun 14 can quickly withdraw from the barrel 11 and the surrounding high-temperature area, avoid backfire flames directly contacting the ignition needle 13 and the fuel injector, prevent the ignition needle 13 electrode from oxidizing and failing, prevent the fuel injector fuel passage from coking and blocking, and ensure the structural integrity and functional reliability of key components.

[0031] When the second displacement mechanism is running, the baffle plate 2 moves out of the receiving groove 21 and completes splicing. The spliced ​​baffle plate 2 forms a complete physical barrier, which can directly block the connection between the barrel 11 channel and the combustion chamber. When the burner stops working and backfire occurs, the flame or high-temperature flue gas is intercepted by the baffle plate 2 and cannot spread through the barrel 11 channel to the fuel supply pipeline or air circulation system inside the burner body 1. This avoids safety risks such as pipeline burnout and fuel leakage caused by backfire and strengthens the redundancy of backfire protection.

[0032] When the burner needs to resume operation, the reverse start-up power component 22 is activated. The power component 22 drives the fire stabilizing plate 12 and the fire baffle 2 to reset to the preset working position through the first displacement mechanism and the second displacement mechanism. No manual adjustment is required, which improves the efficiency of automated operation of the equipment and reduces manual operation costs and operation errors.

[0033] See Figure 3 , Figure 5 and Figure 7 As shown, the first displacement mechanism includes a first bevel gear assembly 23, a screw 24, and a first connecting pipe 25. The first bevel gear assembly 23 is rotatably mounted on the burner body 1, and its working end is fixedly connected to the output end of the power component 22. The screw 24 is rotatably mounted on the burner body 1, and its working end away from the power component 22 is fixedly connected to the first bevel gear assembly 23. The first connecting pipe 25 is threadedly connected to the screw 24 and is fixedly connected to the flame stabilizer plate 12. The first displacement mechanism also includes a first guide assembly, which assists the flame stabilizer plate 12 in linear movement. The first guide assembly includes a connecting block 26, a sliding rod 27, and a support plate 28. The connecting block 26 is fixedly connected to the burner body 1. The sliding rod 27 slidably passes through the left and right sides of the connecting block 26. The support plate 28 is fixedly connected to the ignition needle 13 and the spray gun 14, and the side of the support plate 28 closest to the burner body 1 is fixedly connected to one end of the sliding rod 27.

[0034] Specifically, the first bevel gear assembly 23 consists of meshing bevel gears. The connection block 26 and the slide rod 27 cooperate to form a sliding guide pair.

[0035] When the burner stops working, the power unit 22 is activated, and the output end of one side of the power unit 22 drives the working end of the first bevel gear assembly 23 to rotate. The first bevel gear assembly 23 is composed of meshing bevel gears. Through this meshing transmission structure, the power unit 22 can transmit rotational power to the screw 24, causing the screw 24 to rotate synchronously.

[0036] The connection block 26 and the slide rod 27 cooperate to form a sliding guide pair. This guide pair can restrict the rotational freedom of the stabilizing plate 12, the ignition needle 13 and the spray gun 14, and prevent the three from rotating synchronously with the screw 24. At the same time, the screw 24 and the first connecting pipe 25 are connected by threads. When the screw 24 rotates, it can be converted into the linear movement of the first connecting pipe 25 along the axis of the screw 24, so that the first connecting pipe 25 drives the stabilizing plate 12 to move away from the barrel 11, thereby realizing the synchronous movement of the stabilizing plate 12, the ignition needle 13 and the spray gun 14 away from the barrel 11.

[0037] See Figures 3-6 and Figure 8As shown, the second displacement mechanism includes a transmission assembly, a second guide assembly, and a control assembly. The transmission assembly is disposed on the burner body 1 and the power component 22, and is used to uniformly transmit the rotational power of the power component 22. The second guide assembly is disposed on the burner body 1 and the baffle plate 2, and is used to assist the baffle plate 2 in linear movement. The control assembly is disposed between the transmission assembly and the second guide assembly, and is used to control the moving speed of the baffle plate 2. The transmission assembly includes a second bevel gear assembly 29, a gear disc 210, a gear ring 211, and a third bevel gear assembly 212. The second bevel gear assembly 29 is rotatably disposed on the burner body 1, and the working end of the second bevel gear assembly 29 is fixedly connected to the output end of the power component 22 away from the first bevel gear assembly 23. The gear disc 210 is rotatably disposed on the burner body 1, and the gear disc 210 on one side of the burner body 1 is fixedly connected to the output end of the second bevel gear assembly 29 away from the power component 22. The gear ring 211 is rotatably disposed on the burner body 1, and the gear ring 211 is connected to the gear disc 210. The third bevel gear assembly 212 is rotatably mounted on the burner body 1, and its working end is fixedly connected to the gear disc 210. The second guide assembly includes a second connecting pipe 213 and a slide groove 214. The second connecting pipe 213 is fixedly connected to one side of the baffle plate 2. The slide groove 214 is opened on the side of the burner body 1 near the second connecting pipe 213, and the slide groove 214 slides in cooperation with the second connecting pipe 213. The control assembly includes a connecting rod 215, a slider 216, a first curved groove 217, and a second... The second connecting pipe 213 has a curved groove 218; a connecting rod 215 is disposed in the sliding groove 214, one end of the connecting rod 215 is slidably inserted into the connecting pipe, and the connecting rod 215 is fixedly connected to the burner body 1; a slider 216 is fixedly connected to the end of the connecting rod 215 near the connecting pipe; a first curved groove 217 is opened on the inner side of the second connecting pipe 213, and the first curved groove 217 is slidably engaged with the slider 216; a second curved groove 218 is opened on the side of the second connecting pipe 213 near the first curved groove 217, and the second curved groove 218 is connected to the first curved groove 217.

[0038] Specifically, the second bevel gear assembly 29 and the third bevel gear assembly 212 are composed of meshing bevel gears. The second connecting pipe 213 and the slide groove 214 form a sliding guide pair, and the slide groove 214 has a rectangular cross-sectional shape. The slider 216 forms a sliding guide pair with the first curved groove 217 and the second curved groove 218.

[0039] When the power unit 22 is activated, the output end of the power unit 22, which is away from the first bevel gear assembly 23, drives the working end of the second bevel gear assembly 29 to rotate. The second bevel gear assembly 29 is composed of meshing bevel gears. The power unit 22 can transmit rotational power to the gear disk 210 through the second bevel gear assembly 29, causing the gear disk 210 to rotate synchronously.

[0040] The gear disk 210 and the gear ring 211 are in a meshing state. When the gear disk 210 rotates, it can drive the gear ring 211 to rotate synchronously, thereby driving each gear disk 210 to rotate together. When each gear disk 210 rotates, it synchronously drives the working end of the third bevel gear assembly 212 to rotate. The third bevel gear assembly 212 is also composed of meshing bevel gears, which can transmit rotational power to the connecting rod 215, driving the connecting rod 215 to rotate. The connecting rod 215 further drives the slider 216 to rotate.

[0041] The slider 216 forms a sliding guide pair with the first curved groove 217 and the second curved groove 218. During the rotation of the slider 216, it exerts a squeezing effect on the second curved groove 218. The second connecting pipe 213 forms a sliding guide pair with the slide groove 214, and the slide groove 214 has a rectangular cross-section, which can restrict the rotational freedom of the second connecting pipe 213 and prevent the second connecting pipe 213 from rotating under the squeezing action of the slider 216. This allows the slider 216 to drive the second connecting pipe 213 to move slowly downward through the sliding docking with the second curved groove 218.

[0042] When the slider 216 moves to the point where the second curved groove 218 and the first curved groove 217 pass through, the fire stabilizing plate 12, the ignition needle 13 and the spray gun 14 can be moved away from below the fire baffle 2 to ensure that the three will not interfere with the splicing action of the fire baffle 2. When the slider 216 enters the first curved groove 217, it drives the second connecting pipe 213 to move down quickly through sliding docking with the first curved groove 217, so that the second connecting pipe 213 drives each fire baffle 2 to quickly complete the splicing.

[0043] Working principle: When the burner stops working, the power unit 22 is activated, causing the first connecting pipe 25 to move along the screw 24, so that the stabilizing plate 12 simultaneously drives the ignition needle 13 and the spray gun 14 away from the barrel 11, thereby allowing the stabilizing plate 12, the ignition needle 13 and the spray gun 14 to quickly withdraw from the barrel 11 and the surrounding high-temperature area. At the same time, the second connecting pipe 213 drives the baffle plate 2 to move out of the storage groove 21 and complete the splicing. The spliced ​​baffle plate 2 forms a complete physical barrier, which can directly block the connection between the barrel 11 channel and the combustion chamber.

[0044] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A burner with a backfire avoidance structure, comprising a burner body (1), a barrel (11) fixedly connected to one side of the burner body (1), a flame stabilizer plate (12) disposed inside the burner body (1), an ignition needle (13) and a spray gun (14) fixedly mounted on the flame stabilizer plate (12), wherein the end of the ignition needle (13) away from the flame stabilizer plate (12) and the end of the spray gun (14) away from the flame stabilizer plate (12) can slidably extend out of the burner body (1), characterized in that, A baffle plate (2) is provided between the burner body (1) and the fire stabilizing plate (12); A first displacement mechanism is provided between the burner body (1) and the fire stabilizer plate (12) to support the movement of the fire stabilizer plate (12) to move away from the barrel (11); A second displacement mechanism is provided between the burner body (1) and the baffle plate (2) to support the baffle plate (2) to move closer together.

2. A burner with a backfire avoidance structure according to claim 1, characterized in that, A storage groove (21) is provided on the side of the burner body (1) near the fire baffle (2). The storage groove (21) is slidably engaged with the fire baffle (2). A power component (22) is fixedly installed on the burner body (1). The power component (22) is used to provide power for the operation of the first displacement mechanism and the operation of the second displacement mechanism.

3. A burner with a backfire avoidance structure according to claim 1, characterized in that, The first displacement mechanism includes a first bevel gear assembly (23), a screw (24), and a first connecting pipe (25); The first bevel gear assembly (23) is rotatably mounted on the burner body (1), and the working end of the first bevel gear assembly (23) is fixedly connected to the output end of the power component (22); The screw (24) is rotatably mounted on the burner body (1), and the screw (24) is fixedly connected to the working end of the first bevel gear assembly (23) away from the power component (22); The first connecting pipe (25) is threadedly connected to the screw (24), and the first connecting pipe (25) is fixedly connected to the fire stabilizer plate (12).

4. A burner with a backfire avoidance structure according to claim 3, characterized in that, The first displacement mechanism also includes a first guide assembly, which is used to assist the fire stabilizing plate (12) in linear movement. The first guide assembly includes a connecting block (26), a slide rod (27), and a support plate (28). The connecting block (26) is fixedly connected to the burner body (1); The slide bar (27) can slide through the left and right sides of the connecting block (26); The support plate (28) is fixedly connected to the ignition needle (13) and the spray gun (14), and the side of the support plate (28) near the burner body (1) is fixedly connected to one end of the slide rod (27).

5. A burner with a backfire avoidance structure according to claim 1, characterized in that, The second displacement mechanism includes a transmission assembly, a second guide assembly, and a control assembly; The transmission assembly is installed on the burner body (1) and the power component (22). The transmission assembly is used to uniformly transmit the rotational power of the power component (22). The second guide assembly is disposed on the burner body (1) and the baffle plate (2). The second guide assembly is used to assist the baffle plate (2) in linear movement. The control component is located between the transmission component and the second guide component, and is used to control the moving speed of the fire baffle (2).

6. A burner with a backfire avoidance structure according to claim 5, characterized in that, The transmission assembly includes a second bevel gear assembly (29), a gear disc (210), a gear ring (211), and a third bevel gear assembly (212); The second bevel gear assembly (29) is rotatably mounted on the burner body (1), and the working end of the second bevel gear assembly (29) is fixedly connected to the output end of the power unit (22) away from the first bevel gear assembly (23); The toothed disc (210) is rotatably mounted on the burner body (1), and the toothed disc (210) on one side of the burner body (1) is fixedly connected to the output end of the second bevel gear assembly (29) away from the power unit (22); The toothed ring (211) is rotatably mounted on the burner body (1), and the toothed ring (211) meshes with the toothed disc (210); The third bevel gear assembly (212) is rotatably mounted on the burner body (1), and the working end of the third bevel gear assembly (212) is fixedly connected to the gear disc (210).

7. A burner with a backfire avoidance structure according to claim 5, characterized in that, The second guide assembly includes a second connecting pipe (213) and a slide (214); The second connecting pipe (213) is fixedly connected to one side of the fire baffle (2); The slide groove (214) is located on the side of the burner body (1) near the second connecting pipe (213), and the slide groove (214) slides in conjunction with the second connecting pipe (213).

8. A burner with a backfire avoidance structure according to claim 5, characterized in that, The control components include a connecting rod (215), a slider (216), a first curved groove (217), and a second curved groove (218); The connecting rod (215) is set in the slide groove (214), one end of the connecting rod (215) is slidably inserted into the connecting pipe, and the connecting rod (215) is fixedly connected to the burner body (1); The slider (216) is fixedly connected to the end of the connecting rod (215) near the connecting tube; The first curved groove (217) is opened on the inner side of the second connecting pipe (213), and the first curved groove (217) slides in cooperation with the slider (216); The second curved groove (218) is opened on the side of the second connecting pipe (213) near the first curved groove (217), and the second curved groove (218) is connected to the first curved groove (217).

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