A gas burner

Abstract

The utility model belongs to the field of boiler combustion equipment, concretely relates to a gas burner, including air pipe, outer stable combustion cylinder, inner stable combustion cylinder, air supply subassembly, first connecting subassembly, gas gun and ignition gun, the first end part of outer stable combustion cylinder fixed connection in air pipe, the inner stable combustion cylinder coaxial setting in outer stable combustion cylinder, the clearance space between the inner wall of outer stable combustion cylinder and the outer wall of inner stable combustion cylinder, and the inner chamber of inner stable combustion cylinder all are communicated with the inner chamber of air pipe, the second end part of air pipe is closed and sets up, gas gun and ignition gun all one end from second end part are worn into air pipe, after passing through the inner chamber of air pipe, and the inner chamber of inner stable combustion cylinder is reached, gas gun and inner stable combustion cylinder coaxial setting, inner stable combustion cylinder is slidably connected on the outer surface of gas gun through first connecting subassembly, makes inner stable combustion cylinder can reciprocate sliding on gas gun along the axial direction, air supply subassembly fixed connection is set up on the outer surface of air pipe, and air supply subassembly is communicated with the inner chamber of air pipe, and air supply subassembly is used for conveying air to the inner chamber of air pipe.

Description

Technical Field

[0001] This utility model belongs to the field of boiler combustion equipment, and specifically relates to a gas burner. Background Technology

[0002] Various waste liquids and gases are generated in the production processes of industries such as chemical, papermaking, pharmaceutical, printing and dyeing textile, and steel. Most of these waste liquids and gases are treated by incineration in an incinerator. Some low-calorific-value waste liquids and gases require additional combustion by a gas burner during incineration. These gases can be natural gas, fuel gas, or other combustible gases to ensure the thoroughness of incineration.

[0003] Due to factors such as low calorific value, high water content, or excessive flow rate of waste liquid and waste gas, the internal temperature of the incinerator drops rapidly when it is fed into the incinerator. The rapid change in the furnace temperature field can lead to unstable combustion or flameout of the gas burner. Although existing gas burners are usually equipped with a flame stabilizer to maintain stable combustion, in practical applications, existing gas burners often still have insufficient stable combustion performance. When faced with sudden situations such as furnace negative pressure fluctuations or sudden drops in furnace temperature, the amplitude of the furnace negative pressure fluctuations or sudden drops in furnace temperature can easily exceed the adjustment capacity of the flame stabilizer, leading to unstable combustion or flameout of the gas burner. This, in turn, results in incomplete treatment of waste liquid and waste gas, and a rapid increase in emissions such as carbon monoxide in the furnace, affecting the thoroughness and safety of incineration treatment. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a gas burner that solves the problem of insufficient stable combustion performance. In the face of sudden fluctuations in furnace negative pressure or a sudden drop in furnace temperature, the amplitude of these fluctuations or drops easily exceeds the adjustment capacity of the combustion stabilizer, leading to unstable combustion or flameout. This, in turn, results in incomplete waste liquid and waste gas treatment, a rapid increase in emissions such as carbon monoxide in the furnace, and affects the thoroughness and safety of incineration.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A gas burner includes: an air duct, an outer combustion stabilizer, an inner combustion stabilizer, an air supply assembly, a first connecting assembly, a gas gun, and an ignition gun; The outer combustion stabilizer is fixedly connected to the first end of the air duct, and the inner combustion stabilizer is coaxially disposed inside the outer combustion stabilizer; the gap between the inner wall of the outer combustion stabilizer and the outer wall of the inner combustion stabilizer, as well as the inner cavity of the inner combustion stabilizer, are all in communication with the inner cavity of the air duct. The second end of the air duct is closed; both the gas gun and the ignition gun have one end inserted into the air duct from the second end, passing through the inner cavity of the air duct and extending into the inner cavity of the internally stabilized combustion cylinder; The gas gun and the internally stabilized combustion cylinder are coaxially arranged; the internally stabilized combustion cylinder is slidably connected to the outer peripheral surface of the gas gun through the first connecting component, so that the internally stabilized combustion cylinder can slide back and forth along the axial direction on the gas gun. The air supply assembly is fixedly connected to the outer circumferential surface of the air duct, and the air supply assembly is in communication with the inner cavity of the air duct. The air supply assembly is used to supply air to the inner cavity of the air duct.

[0006] The gas burner provided by this utility model adopts a double-layer combustion stabilization cylinder structure. A portion of the gas ejected from the gas gun is ignited and burned by the ignition gun within the inner combustion stabilization cylinder. The remaining gas, after exiting the inner combustion stabilization cylinder, mixes with air from the gap space and burns. The stable ignition and combustion of the gas inside the inner combustion stabilization cylinder ensures a stable heat source is always present within the gas burner. The remaining gas and flue gas mixture, flowing out of the inner combustion stabilization cylinder at a temperature higher than the ignition temperature of the gas, mixes with air from the gap space and continues to burn. This effectively enhances combustion stability, giving the gas burner provided by this utility model stronger stable combustion performance compared to existing gas burners. It effectively avoids combustion instability or flameout caused by furnace negative pressure fluctuations and sudden drops in furnace temperature, thus effectively improving the thoroughness and safety of waste liquid and waste gas incineration.

[0007] Furthermore, the first connecting assembly includes a mounting sleeve and a plurality of swirl blades; The mounting sleeve is fitted onto the outer circumferential surface of the gas gun and can slide back and forth along the axial direction. Each of the swirl blades is arranged at intervals along the circumferential direction of the mounting sleeve on the outer circumferential surface of the mounting sleeve. One end of the swirl blade is fixedly connected to or integrally formed on the outer circumferential surface of the mounting sleeve, and the other end of the swirl blade is fixedly connected to or integrally formed on the inner wall of the internal combustion cylinder on the side near the air duct.

[0008] By setting each of the swirl blades, the airflow entering the internally stabilized combustion chamber is made to rotate, thereby forming a stable recirculation zone in the internally stabilized combustion chamber, forming a stable ignition source in the internally stabilized combustion chamber, and improving combustion efficiency.

[0009] In one of the technical solutions, one end of the ignition gun is inserted into the air duct from the second end, passes through the inner cavity of the air duct and any of the swirl blades in sequence, and finally extends into the inner cavity of the internally stabilized combustion cylinder.

[0010] In another technical solution, one end of the ignition gun is inserted into the air duct from the second end, extends from the inner cavity of the air duct to the gap space, then penetrates the outer wall of the internally stabilized combustion cylinder, and finally extends into the inner cavity of the internally stabilized combustion cylinder.

[0011] Furthermore, the gas burner also includes a second connecting assembly that is fixedly installed or integrally formed on the inner wall of the outer combustion stabilizing cylinder; The second connecting component is used to mate with the outer peripheral surface of the internal combustion cylinder to coaxially position the outer combustion cylinder and the internal combustion cylinder, and to enable the internal combustion cylinder to slide back and forth along the axial direction.

[0012] By using the first connecting component to slide the internal combustion cylinder onto the outer peripheral surface of the gas gun, and by using the second connecting component to cooperate with the outer peripheral surface of the internal combustion cylinder to coaxially position the outer combustion cylinder and the internal combustion cylinder, the internal combustion cylinder can slide stably along the axial direction, ensuring the coaxiality between the internal combustion cylinder, the outer combustion cylinder and the gas gun. By improving the stability of the structure, the stability of combustion is improved.

[0013] Furthermore, the second connecting component includes at least three limiting blocks; Each of the limiting blocks is fixedly installed or integrally formed on the inner wall of the outer combustion stabilizing cylinder; each of the limiting blocks is arranged at intervals along the circumference of the outer combustion stabilizing cylinder.

[0014] By setting the second connecting component as at least three limiting blocks arranged circumferentially along the outer combustion chamber, it is possible to ensure that the second connecting component blocks the gap space, ensuring that sufficient air can be sent from the duct through the gap space to mix and burn with the remaining fuel gas and flue gas mixture sent from the inner combustion chamber.

[0015] Furthermore, the gas burner also includes a flame detection sleeve and a gas flame monitor; One end of the flame detection sleeve is inserted into the air duct from the second end, passes through the inner cavity of the air duct, and extends into the inner cavity of the internal combustion stabilizer; the gas flame detector is fixedly installed inside the flame detection sleeve.

[0016] By installing the gas flame monitor, the flame status in the internal combustion chamber can be monitored in real time. When flameout is detected, the gas supply is immediately cut off to prevent gas leakage from causing an explosion. The flame detection sleeve protects the internal gas flame monitor from high temperatures, corrosive gases, and mechanical damage, thereby ensuring the accuracy of flame detection and the safe and stable operation of the equipment.

[0017] Furthermore, the gas burner also includes a viewing hole disposed on the second end.

[0018] Furthermore, the air supply assembly includes an air supply duct and an air damper installed on the air supply duct; One end of the air supply pipe is fixedly installed on the outer circumferential surface of the air duct, the air supply pipe is connected to the inner cavity of the air duct, and the air regulating damper is used to adjust the air volume supplied into the inner cavity of the air duct.

[0019] Furthermore, the external combustion stabilizing cylinder is in the shape of a Venturi tube; the external combustion stabilizing cylinder includes an inlet contraction section, a throat compression section and an outlet expansion section arranged sequentially along its central axis; the inlet of the inlet contraction section is used to be fixedly connected to the first end and communicates with the inner cavity of the air duct; The internally stabilized combustion cylinder is coaxially disposed within the inlet contraction section and the throat compression section.

[0020] By setting the external combustion stabilizer as a venturi tube, a high-temperature flue gas recirculation zone can be formed near the nozzle to promote stable combustion, and the waste liquid entering the furnace can be returned to the furnace in time when it is accidentally splashed on the outlet expansion section, so as to avoid entering the burner and affecting the stability of combustion.

[0021] Furthermore, the gas burner also includes a mounting flange, which is fixedly connected to or integrally formed on the outer peripheral surface of the throat compression section; the mounting flange is used to fixably connect to the burner mounting port on the incinerator.

[0022] Furthermore, the outer wall of the internal combustion chamber is provided with a plurality of connecting holes, each of which is located on the side of the outer wall of the internal combustion chamber away from the air duct; the connecting holes are arranged at intervals along the circumference of the internal combustion chamber. Attached Figure Description

[0023] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the gas burner in the embodiment; Figure 2 yes Figure 1 A schematic diagram of the AA cross-section; Figure 3 This is a three-dimensional structural diagram of the internally stabilized combustion cylinder and the first connecting assembly in the embodiment; 1—Air duct, 2—Internal combustion stabilizer, 3—Air supply assembly, 4—Gas gun, 5—Ignition gun, 6—Sleeve, 7—Swirl vane, 8—Limiting block, 9—Flame detector sleeve, 10—Signal viewing hole, 11—Inlet contraction section, 12—Throat compression section, 13—Outlet expansion section, 14—Mounting flange; 2.1 — Connecting hole; 3.1—Air supply duct, 3.2—Air damper. Detailed Implementation

[0025] The technical solutions of the present invention 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 invention, and not all embodiments.

[0026] like Figure 1 and Figure 2 As shown, this embodiment provides a gas burner, including: an air duct 1, an outer combustion stabilizer, an inner combustion stabilizer 2, an air supply assembly 3, a first connecting assembly, a gas gun 4, and an ignition gun 5; The outer flame stabilizer is fixedly connected to the first end of the duct 1, and the inner flame stabilizer 2 is coaxially arranged inside the outer flame stabilizer; the gap between the inner wall of the outer flame stabilizer and the outer wall of the inner flame stabilizer 2, as well as the inner cavity of the inner flame stabilizer 2, are all connected to the inner cavity of the duct 1. The second end of the air duct 1 is closed; both the gas gun 4 and the ignition gun 5 are inserted into the air duct 1 from the second end, pass through the inner cavity of the air duct 1 and extend into the inner cavity of the internal combustion stabilizer 2. The gas gun 4 and the internal combustion cylinder 2 are coaxially arranged; the internal combustion cylinder 2 is slidably connected to the outer peripheral surface of the gas gun 4 through the first connecting component, so that the internal combustion cylinder 2 can slide back and forth along the axial direction on the gas gun 4; The air supply assembly 3 is fixedly connected to the outer circumferential surface of the air duct 1. The air supply assembly 3 is connected to the inner cavity of the air duct 1 and is used to supply air to the inner cavity of the air duct 1.

[0027] The gas burner provided by this utility model adopts a double-layer stabilizing cylinder structure, so that a portion of the gas ejected from the gas gun 4 is ignited and burned by the ignition gun 5 inside the inner stabilizing cylinder 2. The remaining gas mixes with the air coming from the gap space after being ejected from the inner stabilizing cylinder 2 and then burns. The stable ignition and combustion of the gas inside the inner stabilizing cylinder 2 ensures that there is always a stable heat source inside the gas burner. The remaining gas and flue gas mixture flows out of the inner stabilizing cylinder 2 at a temperature higher than the ignition temperature of the gas and mixes with the air coming from the gap space to continue burning. This effectively enhances the stability of combustion, making the gas burner provided by this utility model have stronger stable combustion performance than existing gas burners. It can effectively avoid the occurrence of unstable combustion or flameout caused by furnace negative pressure fluctuations and sudden drops in furnace temperature, and can effectively improve the thoroughness and safety of incineration treatment of waste liquid and waste gas in the incinerator.

[0028] In one embodiment, such as Figure 3 As shown, the first connecting assembly includes a mounting sleeve 6 and a plurality of swirl blades 7; The mounting sleeve 6 is fitted onto the outer circumferential surface of the gas gun 4 and can slide back and forth along the axial direction. Each swirl blade 7 is arranged at intervals along the circumferential direction of the mounting sleeve 6 on the outer circumferential surface of the mounting sleeve 6. One end of the swirl blade 7 is fixedly connected to or integrally formed on the outer circumferential surface of the mounting sleeve 6, and the other end of the swirl blade 7 is fixedly connected to or integrally formed on the inner wall of the internal combustion stabilizing cylinder 2 on the side near the air duct 1.

[0029] By setting each swirl vane 7, the airflow entering the internally stabilized combustion chamber 2 is made to rotate, thereby forming a stable recirculation zone in the internally stabilized combustion chamber 2, forming a stable ignition source in the internally stabilized combustion chamber 2, and improving combustion efficiency.

[0030] There are several ways to insert the ignition gun 5 into the inner cavity of the internal combustion stabilizer 2, including but not limited to: Option A: One end of the ignition gun 5 is inserted into the air duct 1 from the second end, passes through the inner cavity of the air duct 1 in sequence, and then through any swirl blade 7, and finally extends into the inner cavity of the internal combustion stabilizer 2.

[0031] Option B: One end of the ignition gun 5 is inserted into the air duct 1 from the second end, extends from the inner cavity of the air duct 1 to the gap space, then penetrates the outer wall of the internal combustion stabilizer 2, and finally extends into the inner cavity of the internal combustion stabilizer 2.

[0032] In this embodiment, the above-mentioned option A is selected for the option of the ignition gun 5 extending into the inner cavity of the internally stabilized combustion cylinder 2.

[0033] Preferably, in this embodiment, such as Figure 2 As shown, the gas burner also includes a second connecting assembly that is fixedly installed or integrally formed on the inner wall of the outer combustion stabilizing cylinder; The second connecting component is used to mate with the outer peripheral surface of the internal combustion chamber 2 to coaxially position the outer combustion chamber and the internal combustion chamber 2, and to enable the internal combustion chamber 2 to slide back and forth along the axial direction.

[0034] By using the first connecting component to slide the internal combustion cylinder 2 onto the outer peripheral surface of the gas gun 4, and by using the second connecting component to cooperate with the outer peripheral surface of the internal combustion cylinder 2, the external combustion cylinder and the internal combustion cylinder 2 are coaxially positioned, so that the internal combustion cylinder 2 can slide stably along the axial direction, ensuring the coaxiality between the internal combustion cylinder 2, the external combustion cylinder and the gas gun 4, thereby improving the stability of the structure and thus improving the stability of combustion.

[0035] Specifically, in this embodiment, such as Figure 2 As shown, the second connecting component includes at least three limiting blocks 8; Each limiting block 8 is fixedly installed or integrally formed on the inner wall of the outer combustion stabilization cylinder; each limiting block 8 is arranged at intervals along the circumference of the outer combustion stabilization cylinder.

[0036] By setting the second connecting component as at least three limiting blocks 8 arranged circumferentially along the outer combustion stabilizing cylinder, it is possible to ensure that the second connecting component blocks the gap space, and ensure that sufficient air can be sent from the duct 1 through the gap space to mix and burn with the remaining gas and flue gas mixture sent from the inner combustion stabilizing cylinder 2.

[0037] Preferably, in this embodiment, such as Figure 1 and Figure 2 As shown, the gas burner also includes a flame detection sleeve 9 and a gas flame monitor; One end of the flame detection sleeve 9 is inserted into the air duct 1 from the second end, passes through the inner cavity of the air duct 1, and extends into the inner cavity of the internal combustion stabilizer 2; the gas flame detector is fixedly installed inside the flame detection sleeve 9.

[0038] By installing a gas flame monitor, the flame status in the internal combustion stabilization cylinder 2 can be monitored in real time. When flameout is detected, the gas supply is immediately cut off to prevent gas leakage from causing an explosion. By installing a flame detection sleeve 9, the internal gas flame monitor can be protected from high temperature, corrosive gases and mechanical damage, thereby ensuring the accuracy of flame detection and the safe and stable operation of the equipment.

[0039] There are several ways to insert the flame detector sleeve 9 into the inner cavity of the internal combustion stabilizer 2. You can refer to Scheme A and Scheme B mentioned above, where the ignition gun 5 is inserted into the inner cavity of the internal combustion stabilizer 2. These will not be elaborated on here.

[0040] Preferably, in this embodiment, such as Figure 1 and Figure 2 As shown, the gas burner also includes a viewing hole 10 located at the second end.

[0041] Specifically, in this embodiment, such as Figure 1 and Figure 2 As shown, two fire-viewing holes 10 are provided on the second end.

[0042] Specifically, in this embodiment, such as Figure 1 and Figure 2 As shown, the air supply assembly 3 includes an air supply duct 3.1 and an air regulating damper 3.2 installed on the air supply duct 3.1; One end of the air supply duct 3.1 is fixedly installed on the outer circumference of the air duct 1. The air supply duct 3.1 is connected to the inner cavity of the air duct 1. The air regulating damper 3.2 is used to adjust the air volume supplied into the inner cavity of the air duct 1.

[0043] Preferably, in this embodiment, such as Figure 2 As shown, the external combustion stabilization tube is in the shape of a Venturi tube; the external combustion stabilization tube includes an inlet contraction section 11, a throat compression section 12 and an outlet expansion section 13 arranged sequentially along its central axis; the inlet of the inlet contraction section 11 is used to be fixedly connected to the first end and communicates with the inner cavity of the air duct 1; The internally stabilized combustion chamber 2 is coaxially arranged within the inlet contraction section 11 and the throat compression section 12.

[0044] By setting the external combustion stabilizer as a venturi tube, a high-temperature flue gas recirculation zone can be formed near the nozzle to promote stable combustion, and the waste liquid entering the furnace can be returned to the furnace in time when it is accidentally splashed on the outlet expansion section 13, so as to avoid entering the burner and affecting the stability of combustion.

[0045] Specifically, in this embodiment, such as Figure 2 As shown, the gas burner also includes a mounting flange 14, which is fixedly connected to or integrally formed on the outer peripheral surface of the throat compression section 12; the mounting flange 14 is used to fixally connect to the burner mounting port on the incinerator.

[0046] Preferably, in this embodiment, such as Figure 3 As shown, multiple connecting holes 2.1 are provided on the outer wall of the internal combustion cylinder 2. Each connecting hole 2.1 is located on the side of the outer wall of the internal combustion cylinder 2 away from the air duct 1. The connecting holes 2.1 are arranged at intervals along the circumference of the internal combustion cylinder 2.

[0047] By setting each connecting hole 2.1 on the outer wall of the internal combustion cylinder 2 away from the air duct 1, a local low-speed airflow can be formed through the opening, which can stabilize the flame in the internal combustion cylinder 2 and promote the secondary mixing of the remaining gas in the internal combustion cylinder 2 with the air in the gap space, reduce incomplete combustion, and also reduce the cylinder temperature, preventing the flame from propagating backward to the gas supply end.

[0048] The gas burner provided by this utility model has at least the following technical effects or advantages: 1. The gas burner provided by this utility model adopts a double-layer stabilizing cylinder structure, so that a part of the gas injected by the gas gun 4 is ignited and burned by the ignition gun 5 in the inner stabilizing cylinder 2. The remaining gas mixes with the air coming from the gap space after being injected out of the inner stabilizing cylinder 2 and then burns. The stable ignition and combustion of the gas inside the inner stabilizing cylinder 2 ensures that there is always a stable heat source in the gas burner. The remaining gas and flue gas mixture flows out of the inner stabilizing cylinder 2 at a temperature higher than the ignition temperature of the gas and mixes with the air coming from the gap space to continue burning. This can effectively enhance the stability of combustion, so that the gas burner provided by this utility model has stronger stable combustion performance than existing gas burners. It can effectively avoid the occurrence of unstable combustion or flameout caused by furnace negative pressure fluctuations and sudden drops in furnace temperature. It can effectively improve the thoroughness and safety of the incinerator in incinerating waste liquid and waste gas.

[0049] 2. By setting each swirl vane 7, the airflow entering the internally stabilized combustion chamber 2 is made to rotate, thereby forming a stable recirculation zone in the internally stabilized combustion chamber 2, forming a stable ignition source in the internally stabilized combustion chamber 2, and improving combustion efficiency.

[0050] 3. By using the first connecting component to slide the internal combustion cylinder 2 onto the outer peripheral surface of the gas gun 4, and by using the second connecting component to cooperate with the outer peripheral surface of the internal combustion cylinder 2, the external combustion cylinder and the internal combustion cylinder 2 are coaxially positioned, so that the internal combustion cylinder 2 can slide stably along the axial direction, ensuring the coaxiality between the internal combustion cylinder 2, the external combustion cylinder and the gas gun 4, thereby improving the stability of the structure and the stability of combustion.

[0051] 4. By setting the second connecting component as at least three limiting blocks 8 arranged circumferentially along the outer combustion stabilizing cylinder, it is possible to ensure that the second connecting component blocks the gap space, and ensure that sufficient air can be sent from the duct 1 through the gap space to mix and burn with the remaining gas and flue gas mixture sent from the inner combustion stabilizing cylinder 2.

[0052] 5. By setting up a gas flame monitor, the flame status in the internal combustion stabilization cylinder 2 can be monitored in real time. When flameout is detected, the gas supply will be cut off immediately to prevent gas leakage from causing an explosion. By setting up a flame detection sleeve 9, the internal gas flame monitor can be protected from high temperature, corrosive gases and mechanical damage, thereby ensuring the accuracy of flame detection and the safe and stable operation of the equipment.

[0053] 6. By setting the external combustion stabilizer as a venturi tube, a high-temperature flue gas recirculation zone can be formed near the nozzle to promote stable combustion. At the same time, it can ensure that the waste liquid entering the furnace can flow back into the furnace in time when it is accidentally splashed on the outlet expansion section 13, so as to avoid entering the burner and affecting the stability of combustion.

[0054] 7. By setting each connecting hole 2.1 on the outer wall of the internal combustion cylinder 2 away from the air duct 1, a local low-speed airflow can be formed through the opening, which can stabilize the flame in the internal combustion cylinder 2 and promote the secondary mixing of the remaining gas in the internal combustion cylinder 2 with the air in the gap space, reduce incomplete combustion, and also reduce the cylinder temperature, preventing the flame from propagating backward to the gas supply end.

[0055] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of this utility model.

Claims

1. A gas burner, characterized in that, include: Air duct, external combustion stabilizer, internal combustion stabilizer, air supply assembly, first connecting assembly, gas gun and ignition gun; The outer combustion stabilizer is fixedly connected to the first end of the air duct, and the inner combustion stabilizer is coaxially disposed inside the outer combustion stabilizer; the gap space between the inner wall of the outer combustion stabilizer and the outer wall of the inner combustion stabilizer, as well as the inner cavity of the inner combustion stabilizer, are all in communication with the inner cavity of the air duct. The second end of the air duct is closed; both the gas gun and the ignition gun have one end inserted into the air duct from the second end, passing through the inner cavity of the air duct and extending into the inner cavity of the internally stabilized combustion cylinder; The gas gun and the internally stabilized combustion cylinder are coaxially arranged; the internally stabilized combustion cylinder is slidably connected to the outer peripheral surface of the gas gun through the first connecting component, so that the internally stabilized combustion cylinder can slide back and forth along the axial direction on the gas gun. The air supply assembly is fixedly connected to the outer circumferential surface of the air duct, and the air supply assembly is in communication with the inner cavity of the air duct. The air supply assembly is used to supply air to the inner cavity of the air duct.

2. The gas burner according to claim 1, characterized in that: The first connecting assembly includes a mounting sleeve and a plurality of swirl blades; The mounting sleeve is fitted onto the outer circumferential surface of the gas gun and can slide back and forth along the axial direction. Each of the swirl blades is arranged at intervals along the circumferential direction of the mounting sleeve on the outer circumferential surface of the mounting sleeve. One end of the swirl blade is fixedly connected to or integrally formed on the outer circumferential surface of the mounting sleeve, and the other end of the swirl blade is fixedly connected to or integrally formed on the inner wall of the internal combustion cylinder on the side near the air duct.

3. The gas burner according to claim 2, characterized in that: One end of the ignition gun enters the air duct from the second end, passes through the inner cavity of the air duct and any of the swirl blades in sequence, and finally extends into the inner cavity of the internally stabilized combustion cylinder.

4. The gas burner according to claim 2, characterized in that: One end of the ignition gun enters the air duct from the second end, extends from the inner cavity of the air duct to the gap space, then enters the outer wall of the internally stabilized combustion cylinder, and finally extends into the inner cavity of the internally stabilized combustion cylinder.

5. The gas burner according to claim 1, characterized in that: It also includes a second connecting assembly that is fixedly installed or integrally formed on the inner wall of the outer combustion stabilizing cylinder; The second connecting component is used to mate with the outer peripheral surface of the internal combustion cylinder to coaxially position the outer combustion cylinder and the internal combustion cylinder, and to enable the internal combustion cylinder to slide back and forth along the axial direction.

6. The gas burner according to claim 5, characterized in that: The second connecting component includes at least three limiting blocks; Each of the limiting blocks is fixedly installed or integrally formed on the inner wall of the outer combustion stabilizing cylinder; each of the limiting blocks is arranged at intervals along the circumference of the outer combustion stabilizing cylinder.

7. The gas burner according to claim 1, characterized in that: It also includes flame detection sleeves and gas flame detectors; One end of the flame detection sleeve is inserted into the air duct from the second end, passes through the inner cavity of the air duct, and extends into the inner cavity of the internal combustion stabilizer; the gas flame detector is fixedly installed inside the flame detection sleeve.

8. The gas burner according to claim 1, characterized in that: It also includes a fire-viewing hole provided on the second end.

9. The gas burner according to claim 1, characterized in that: The air supply assembly includes an air supply duct and an air regulating damper installed on the air supply duct; One end of the air supply pipe is fixedly installed on the outer circumferential surface of the air duct, the air supply pipe is connected to the inner cavity of the air duct, and the air regulating damper is used to adjust the air volume supplied into the inner cavity of the air duct.

10. The gas burner according to claim 1, characterized in that: The external combustion stabilizing cylinder is in the shape of a Venturi tube; the external combustion stabilizing cylinder includes an inlet constriction section, a throat compression section and an outlet expansion section arranged sequentially along its central axis; the inlet of the inlet constriction section is used to be fixedly connected to the first end and communicates with the inner cavity of the air duct; The internally stabilized combustion cylinder is coaxially disposed within the inlet contraction section and the throat compression section.

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