A gas burner

Abstract

The present application provides a kind of gas burner, belongs to mechanical technical field.It has solved the problem of large volume of existing burner.The present gas burner includes furnace cylinder and fixed in the front end of furnace cylinder and the combustion head of cylindrical shape, gas pipe is fixed in furnace cylinder, and the front end and rear end of gas pipe are respectively provided with gas outlet and gas inlet, and gas inlet is outside furnace cylinder, a circle of gas outlet pipe is provided in combustion head, rear end of gas outlet pipe is communicated with gas outlet, and a circle of flue gas inlet one is provided on the side wall of the front end of combustion head, and mixing bucket is also fixed in combustion head, and gas outlet pipe is outside mixing bucket;The front end of mixing bucket is provided with open port, and the front end port of mixing bucket is in front of gas outlet pipe;Cylinder is fixed in mixing bucket, the front end of cylinder is open, and the rear end is closed, the outer diameter of cylinder is less than the inner diameter of mixing bucket, and the mixing cavity is formed between the outer wall of cylinder and the inner wall of mixing bucket, the rear end surface of mixing bucket is provided with gas guide gap for making the inner cavity of furnace cylinder communicate with mixing cavity, and a circle of gas guide port is formed on the outer wall of cylinder.The present gas burner is small in size.

Description

Technical Field

[0001] This invention belongs to the field of mechanical technology and relates to a burner, particularly a gas burner. Background Technology

[0002] A gas burner is a type of burner that works by igniting air and fuel through a premixing device to mix them in an appropriate ratio for complete combustion. It delivers fuel and air into the furnace at the required concentration, velocity, turbulence, and mixing method, and enables the fuel to ignite and burn stably in the furnace.

[0003] Existing gas burners, such as the flue gas double-recirculation burner disclosed in the Chinese Patent Database (application number: 201921864577.1), include a furnace body and a combustion cylinder. One end of the combustion cylinder extends into the furnace body and is provided with a combustion port at the end. The other end is located outside the furnace body and is provided with a fan and a gas valve assembly at the end. The combustion cylinder is provided with several gas supply pipes connected to the gas valve assembly and an ignition device for igniting the gas. The furnace body is provided with a flue pipe, and a return pipe is provided on the flue pipe. The return pipe is connected to the air inlet of the fan, and the air inlet of the fan is also connected to the outside. The combustion cylinder has several return holes evenly opened circumferentially on the outer wall of the front end near the combustion port.

[0004] The aforementioned burner utilizes a reflux orifice and a combination of exhaust and reflux pipes to achieve dual flue gas reflux, effectively reducing nitrogen oxide emissions and environmental pollution. However, the overall volume of the reflux channel, composed of the exhaust and reflux pipes, is relatively large, occupying excessive space. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a gas burner with a compact structure and low nitrogen oxide production.

[0006] The objective of this invention can be achieved through the following technical solution: A gas burner includes a furnace cylinder and a cylindrical burner head fixed at the front end of the furnace cylinder. A gas pipe is fixed inside the furnace cylinder. The front end and rear end of the gas pipe are respectively provided with a gas outlet and a gas inlet, and the gas inlet is outside the furnace cylinder. A ring of gas outlet pipes is provided inside the burner head, and the rear end of the gas outlet pipes is connected to the gas outlet. A ring of flue gas inlets is provided on the front side wall of the burner head. The characteristic feature is that a mixing tank is also coaxially fixed inside the burner head, and the gas outlet pipe is located outside the mixing tank. The front end of the mixing tank is open, and the front port of the mixing tank is in front of the gas outlet pipe. A cylinder body is coaxially fixed inside the mixing tank, and the front end of the cylinder body is open and the rear end is closed. The outer diameter of the cylinder body is smaller than the inner diameter of the mixing tank, and a mixing cavity is formed between the outer wall of the cylinder body and the inner wall of the mixing tank. A gas guide gap is provided on the rear end face of the mixing tank to allow the inner cavity of the furnace cylinder to connect to the mixing cavity. A ring of gas guide ports is formed on the outer wall of the cylinder body to allow the inner cavity of the cylinder body to connect to the mixing cavity.

[0007] During use, some of the flue gas produced by combustion is drawn into the flue gas inlet and flows back into the burner head to be mixed with the fuel gas and air in sequence for re-combustion; some flue gas is drawn into the cylinder, enters the mixing chamber through the air guide port, and flows forward under the influence of the air entering through the air guide gap, and finally mixes with the fuel gas and air in sequence for re-combustion, thereby effectively diluting the oxygen content at the combustion site and reducing the generation of nitrogen oxides.

[0008] The combined effect of the flue gas inlet and the flue gas recirculation channel composed of the cylinder and the mixing barrel can effectively increase the flue gas recirculation flow rate. While greatly reducing the generation of nitrogen oxides, the flue gas recirculation channel is located inside the burner head, which can effectively reduce the distance between the components at the burner head, making the overall structure more compact and reducing space occupation.

[0009] In the aforementioned gas burner, a ring of gas outlets is provided on the front side wall of the mixing chamber, and the gas outlets are located in front of the gas outlet pipe, so that some of the gas in the mixing chamber flows out through the gas outlets and comes into more full contact with the gas flowing out from the gas outlet pipe, thereby further reducing the generation of nitrogen oxides.

[0010] In the aforementioned gas burner, the front side wall of the mixing tank is a cone with a diameter that gradually decreases from front to back, which serves as a guide to allow the gas inside the mixing tank to diffuse outward and better contact with the gas.

[0011] In the aforementioned gas burner, the front end of the gas pipe is positioned directly opposite the cylinder body; a horizontal connecting rod is provided between the gas pipe and the cylinder body, with both ends of the connecting rod fixedly connected to the gas pipe and the cylinder body respectively; a clearance hole is provided on the rear end face of the mixing tank to match the front end of the connecting rod and allow the front end of the connecting rod to pass through. This design offers advantages such as simple structure and convenient installation.

[0012] In the aforementioned gas burner, the mixing chamber consists of a cylindrical main body and a baffle coaxially arranged inside the main body, with the baffle located on the rear side of the cylinder. The aforementioned clearance holes and air guide gaps are all located on the baffle, and the baffle is fixedly connected to the connecting rod. The side wall of the baffle and the inner wall of the main body are fitted together to form an annular gap, allowing more and more air from inside the casing to enter the mixing chamber more evenly, thereby propelling the flue gas forward more quickly.

[0013] In the aforementioned gas burner, the cylinder includes a cylindrical impeller and guide rings and sealing plates respectively pressed against and fixed to the front and rear faces of the cylindrical impeller. The sealing plate is fixedly connected to the connecting rod and seals the rear end of the cylindrical impeller. The outlet of the cylindrical impeller is the aforementioned air inlet. The flue gas drawn into the cylinder is discharged outward through the cylindrical impeller, achieving spiral exhaust, which allows the flue gas to come into more thorough and uniform contact and mix with the air.

[0014] In the aforementioned gas burner, the burner head includes a front ring and a rear ring arranged coaxially. A first flue gas inlet is located on the front ring, and the rear end of the rear ring is fitted onto the furnace cylinder, with both sealed and fixedly connected. A long cylinder is provided between the front and rear rings, with the axes of the long cylinder and the burner head parallel. A connecting ring is coaxially located inside the rear ring, fitted onto the rear end of the mixing tank, and its outer side is sealed and fixedly connected to the rear ring. Both ends of the long cylinder are fixedly connected to the front ring and the connecting ring, respectively. A second flue gas inlet is formed between two adjacent long cylinders, and each second flue gas inlet is equipped with the aforementioned outlet pipe. An axially penetrating air passage hole connects the inner cavities of the furnace cylinder and the long cylinder; the number of air passage holes is the same as that of the long cylinder, and their positions correspond one-to-one. The rear end of the aforementioned outlet pipe passes through the connecting ring. The middle part of the burner head consists of a connecting ring and a long cylinder. This design ensures stable forward airflow to the front end of the burner head for combustion, improving combustion quality. Furthermore, the addition of a second flue gas inlet allows for more flue gas recirculation, further reducing nitrogen oxide production.

[0015] In the gas burner described above, the cross-section of the long cylinder is triangular, and the inner diameter of the long cylinder gradually decreases from the outside to the inside. That is, the long cylinder has a structure that is larger on the outside and smaller on the inside. This allows more long cylinders to be arranged in the burner head, thereby increasing the number of flue gas inlets and outlet pipes and improving the combustion quality.

[0016] In the aforementioned gas burner, a sealing ring is fixed between the rear ring and the furnace cylinder. The sealing ring is located behind the connecting ring, and the sealing ring, rear ring, and furnace cylinder form an annular cavity. The rear end of the gas outlet pipe is fixed to the sealing ring and connects to the annular cavity, and the gas outlet also connects to the annular cavity. This design facilitates assembly.

[0017] In the aforementioned gas burner, the long cylinder is pressed onto the main body and the two are fixedly connected, which facilitates the overall positioning of the mixing tank.

[0018] Compared with existing technologies, this gas burner has the following advantages: 1. The combined effect of the flue gas inlet and the flue gas recirculation channel composed of the cylinder and the mixing barrel can effectively increase the flue gas recirculation flow rate. While greatly reducing the generation of nitrogen oxides, the flue gas recirculation channel is located inside the burner head, which can effectively reduce the distance between the components at the burner head, making the overall structure more compact and reducing space occupation.

[0019] 2. The middle part of the burner head consists of a connecting ring and a long cylinder. Under the premise of ensuring stable air flow to the front end of the burner head to participate in combustion, the combustion quality is improved. It also increases the flue gas inlet to allow more flue gas to flow back, further reducing the generation of nitrogen oxides. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the gas burner.

[0021] Figure 2This is a cross-sectional schematic diagram of the gas burner.

[0022] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0023] Figure 4 This is a schematic diagram showing the positions of the long cylinder, the exhaust pipe, the mixing tank, and the cylinder body.

[0024] Figure 5 This is a schematic diagram showing the positions of the connecting ring and the mixing tank.

[0025] In the diagram, 1. Furnace cylinder; 2. Burner head; 2a. Front ring; 2a1. Flue gas inlet one; 2b. Rear ring; 2c. Long cylinder; 2d. Connecting ring; 2d1. Air passage hole; 2e. Flue gas inlet two; 3. Fan; 4. Gas pipe; 4a. Gas inlet; 4b. Gas outlet; 5. Gas outlet pipe; 5a. Pipe body; 5b. Gas guide pipe; 6. Mixing tank; 6a. Main body; 6a1. Gas outlet; 6b. Baffle; 6b1. Gas guide gap; 7. Cylinder body; 7a. Cylindrical impeller; 7a1. Gas guide port; 7b. Guide ring; 7c. Sealing plate; 8. Mixing chamber; 9. Connecting rod; 10. Sealing ring; 11. Annular cavity; 12. Connecting pipe. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0027] like Figure 1 As shown, this gas burner includes a furnace cylinder 1 and a cylindrical burner head 2 fixed at the front end of the furnace cylinder 1.

[0028] in, The rear end of the furnace cylinder 1 is connected to the blower 3, which supplies air into the furnace cylinder 1. A gas pipe 4 is fixed inside the furnace cylinder 1. The front and rear ends of the gas pipe 4 are respectively provided with a gas outlet 4b and a gas inlet 4a, with the gas inlet 4a located outside the furnace cylinder 1. In the actual product, the gas pipe 4 is roughly L-shaped, with the front end closed and the rear end open. The rear end of the gas pipe 4 extends out of the furnace cylinder 1, and the rear end of the gas pipe 4 is the aforementioned gas inlet 4a. The gas outlet 4b is located on the front side wall of the gas pipe 4. The burner head 2 is provided with a ring of gas outlet pipes 5 evenly distributed around the circumference of the burner head 2, and the rear end of each gas outlet pipe 5 is connected to the gas outlet 4b.

[0029] like Figure 1 , Figure 2 and Figure 3As shown, a ring of flue gas inlets 2a1, evenly spaced around the front side wall of the burner head 2, is provided. The flue gas inlets 2a1 are located in front of the front port of the outlet pipe 5, and preferably, the gas inlets 4a1 are triangular. A mixing tank 6 is coaxially fixed inside the burner head 2, and the outlet pipe 5 is located outside the mixing tank 6. The front end of the mixing tank 6 is open, and its front port is in front of the outlet pipe 5. A cylinder 7 is coaxially fixed inside the mixing tank 6, with an open front end and a closed rear end. The outer diameter of the cylinder 7 is smaller than the inner diameter of the mixing tank 6, and there is a certain distance between the rear end face of the cylinder 7 and the rear end face of the mixing tank 6. A mixing chamber 8 is formed between the outer wall of the cylinder 7 and the inner wall of the mixing tank 6. The rear end face of the mixing tank 6 is provided with a gas guide gap 6b1 that connects the inner cavity of the furnace cylinder 1 to the mixing chamber 8. A ring of gas guide ports 7a1 is formed on the outer wall of the cylinder 7 to connect the inner cavity of the cylinder 7 to the mixing chamber 8, and the ring of gas guide ports 7a1 is evenly distributed around the circumference of the cylinder 7.

[0030] During use, some of the flue gas produced by combustion is drawn into the flue gas inlet 2a1 and returned to the burner head 2 to be mixed with the fuel gas and air for re-combustion; some flue gas is drawn into the cylinder 7, enters the mixing chamber 8 through the air guide port 7a1, and flows forward under the influence of the air entering through the air guide gap 6b1, and finally mixes with the fuel gas for re-combustion, thereby effectively diluting the oxygen content at the combustion site and reducing the generation of nitrogen oxides.

[0031] The combined effect of the flue gas inlet 2a1 and the flue gas recirculation channel composed of the cylinder 7 and the mixing tank 6 can effectively increase the flue gas recirculation flow rate. While greatly reducing the generation of nitrogen oxides, the flue gas recirculation channel is located inside the burner head 2, which can effectively reduce the distance between the components at the burner head 2, making the overall structure more compact and reducing space occupation.

[0032] To further explain, the front sidewall of the mixing tank 6 is a cone shape with a diameter that gradually decreases from front to back, serving as a guide to allow the gas inside the mixing tank 6 to diffuse outwards and better contact with the combustion gas. For example... Figure 3 and Figure 4 As shown, the front side wall of the mixing chamber 6 is provided with a ring of evenly spaced gas outlets 6a1 along the circumference of the mixing chamber 6, and the gas outlets 6a1 are in front of the gas outlet pipe 5, so that some of the gas in the mixing chamber 8 flows out through the gas outlets 6a1 and comes into more complete contact with the fuel gas flowing out from the gas outlet pipe 5, thereby further reducing the generation of nitrogen oxides. Preferably, the gas outlets 6a1 are also triangular.

[0033] In this embodiment, like Figure 3 and Figure 4As shown, the structure of the cylinder 7 is as follows: The cylinder 7 includes a cylindrical impeller 7a and a guide ring 7b and a sealing plate 7c that are respectively pressed against and fixed to the front and rear faces of the cylindrical impeller 7a, and the cylindrical impeller 7a, guide ring 7b and sealing plate 7c are coaxially arranged. The sealing plate 7c seals the rear end of the cylindrical impeller 7a; the outlet of the cylindrical impeller 7a is the aforementioned air inlet 7a1. The flue gas drawn into the cylinder 7 is discharged outward through the cylindrical impeller 7a, achieving spiral exhaust, allowing the flue gas to more fully and evenly mix with the air.

[0034] like Figure 3 As shown, the cylinder 7 is installed as follows: the front end of the gas pipe 4 faces the cylinder 7, and a connecting rod 9 is horizontally installed between the gas pipe 4 and the cylinder 7. Both ends of the connecting rod 9 are fixedly connected to the gas pipe 4 and the sealing plate 7c, respectively. The rear end face of the mixing tank 6 has a clearance hole that matches the front end of the connecting rod 9 and allows the front end of the connecting rod 9 to pass through. In the actual product, both ends of the connecting rod 9 are fixedly connected to the gas pipe 4 and the sealing plate 7c, respectively, by screws.

[0035] The structure of the mixing chamber 6 is as follows: The mixing chamber 6 consists of a cylindrical main body 6a and a baffle 6b coaxially disposed inside the main body 6a, with the baffle 6b located on the rear side of the cylinder 7. The main body 6a is fixed; clearance holes and air guide gaps 6b1 are both located on the baffle 6b, and the baffle 6b is fixedly connected to the connecting rod 9; the air outlet 6a1 is located on the main body 6a; the side wall of the baffle 6b and the inner wall of the main body 6a form an annular gap through a clearance fit, allowing more and more air from inside the casing to enter the mixing chamber 8, thus propelling the flue gas forward more rapidly.

[0036] like Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, the burner head 2 has the following specific structure: it includes a front ring 2a and a rear ring 2b arranged coaxially, with the rear end of the rear ring 2b fitted onto the furnace cylinder 1 and the two sealed and fixedly connected; a long cylinder 2c is provided between the front ring 2a and the rear ring 2b, evenly spaced along the circumference of the burner head 2, and the axes of the long cylinder 2c and the burner head 2 are parallel. The flue gas inlet 2a1 is located on the front ring 2a; a connecting ring 2d is coaxially provided inside the rear ring 2b, fitted onto the rear end of the mixing tank 6, and the outer side of the connecting ring 2d is sealed and fixedly connected to the rear ring 2b. The two ends of the long cylinder 2c are in contact with and fixed to the front ring 2a and the connecting ring 2d, respectively. A flue gas inlet 2e is formed between two adjacent long cylinders 2c. Each flue gas inlet 2e is equipped with the aforementioned exhaust pipe 5, and the rear end of the exhaust pipe 5 passes through the connecting ring 2d. An air passage 2d1 is axially passed through the connecting ring 2d to conduct air between the inner cavities of the furnace cylinder 1 and the long cylinder 2c. The number of air passages 2d1 and the long cylinder 2c are the same and their positions correspond one-to-one. The middle part of the burner head 2 consists of the connecting ring 2d and a ring of long cylinders 2c. Under the premise of ensuring stable forward air flow to the front end of the burner head 2 to participate in combustion, the combustion quality is improved. In addition, the addition of the flue gas inlet 2e allows for more flue gas recirculation, further reducing the generation of nitrogen oxides.

[0037] To further explain, the cross-section of the long cylinder 2c is triangular, and the inner diameter of the long cylinder 2c gradually decreases from the outside to the inside, that is, the long cylinder 2c has a structure that is larger on the outside and smaller on the inside. This allows more long cylinders 2c to be arranged in the burner head 2, so as to simultaneously increase the number of flue gas inlets 2e and exhaust pipes 5, thereby improving the combustion quality.

[0038] The connection between the gas outlet pipe 5 and the gas inlet 4a is as follows: A sealing ring 10 is fixed between the rear ring 2b and the furnace cylinder 1. The sealing ring 10 is fitted onto the furnace cylinder 1 and is located behind the connecting ring 2d. An annular cavity 11 is formed between the sealing ring 10, the rear ring 2b, and the furnace cylinder 1. The rear end of the gas outlet pipe 5 is fixed to the sealing ring 10 and connects to the aforementioned annular cavity 11. The aforementioned gas outlet 4b also connects to the annular cavity 11. In the actual product, there are multiple gas outlets 4b distributed circumferentially along the gas pipe 4. Each gas outlet 4b is connected to the annular cavity 11 through a connecting pipe 12.

[0039] The positioning method of the main body 6a of the gas mixing tank 6 is as follows: the long cylinder 2c is pressed on the main body 6a and the two are fixedly connected, which facilitates the overall positioning of the gas mixing tank 6.

[0040] In the actual product, the structure of the vent pipe 5 is as follows: Figures 3 to 5As shown, the exhaust pipe 5 includes an L-shaped pipe body 5a. The rear axis of the pipe body 5a is horizontally positioned, and the rear end of the pipe body 5a passes through the connecting ring 2d. The rear end of the pipe body 5a is fixed to the sealing ring 10 and connects to the aforementioned annular cavity 11. A horizontally formed air guide pipe 5b is formed at the front end of the pipe body 5a. The axes of the air guide pipe 5b and the burner head 2 are parallel, and the inner hole at the rear end of the air guide pipe 5b connects to the inner hole of the pipe body 5a. Each pipe body 5a has at least two air guide pipes 5b formed on it. Multiple air guide pipes 5b on the same pipe body 5a are distributed along the axial direction of the front end of the pipe body 5a, and the length of the multiple air guide pipes 5b on the same pipe body 5a gradually decreases from the outside of the burner head 2 to the inside of the burner head 2.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A gas burner, comprising a furnace cylinder (1) and a cylindrical burner head (2) fixed to the front end of the furnace cylinder (1), wherein a gas pipe (4) is fixed inside the furnace cylinder (1), and the front end and rear end of the gas pipe (4) are respectively provided with a gas outlet (4b) and a gas inlet (4a), and the gas inlet (4a) is outside the furnace cylinder (1), a gas outlet pipe (5) is provided inside the burner head (2), the rear end of the gas outlet pipe (5) is connected to the gas outlet (4b), and a flue gas inlet (2a1) is provided on the front side wall of the burner head (2), characterized in that, A mixing tank (6) is coaxially fixed inside the burner head (2), and the gas outlet pipe (5) is located outside the mixing tank (6); the front end of the mixing tank (6) is open, and the front port of the mixing tank (6) is in front of the gas outlet pipe (5); a cylinder (7) is coaxially fixed inside the mixing tank (6), and the front end of the cylinder (7) is open and the rear end is closed. The outer diameter of the cylinder (7) is smaller than the inner diameter of the mixing tank (6), and a mixing chamber (8) is formed between the outer wall of the cylinder (7) and the inner wall of the mixing tank (6). A gas guide gap (6b1) is provided on the rear end face of the mixing tank (6) to allow the inner cavity of the furnace cylinder (1) to connect to the mixing chamber (8). A gas guide port (7a1) is formed on the outer wall of the cylinder (7) to allow the inner cavity of the cylinder (7) to connect to the mixing chamber (8). The burner head (2) includes a front ring (2a) and a rear ring (2b) arranged coaxially. The flue gas inlet (2a1) is located on the front ring (2a), and the rear end of the rear ring (2b) is fitted onto the furnace cylinder (1) and the two are sealed and fixed together. A long cylinder (2c) is provided between the front ring (2a) and the rear ring (2b), and the axes of the long cylinder (2c) and the burner head (2) are arranged parallel. A connecting ring (2d) is coaxially provided inside the rear ring (2b). The connecting ring (2d) is fitted onto the rear end of the mixing barrel (6), and the outer side of the connecting ring (2d) is flush with the rear ring (2b). The long cylinder (2c) is sealed and fixed at both ends to the front ring (2a) and the connecting ring (2d) respectively. A second flue gas inlet (2e) is formed between two adjacent long cylinders (2c), and each second flue gas inlet (2e) is provided with the above-mentioned exhaust pipe (5). An air passage hole (2d1) is axially passed through the connecting ring (2d) to conduct the inner cavity of the furnace cylinder (1) and the long cylinder (2c). The number of air passage holes (2d1) and the long cylinder (2c) are the same and their positions correspond one-to-one. The rear end of the above-mentioned exhaust pipe (5) passes through the connecting ring (2d).

2. The gas burner according to claim 1, characterized in that, A ring of air outlets (6a1) is provided on the front side wall of the mixing tank (6), and the air outlets (6a1) are in front of the air outlet pipe (5).

3. The gas burner according to claim 1 or 2, characterized in that, The front side wall of the mixing tank (6) is a cone shape with a diameter that gradually decreases from front to back.

4. The gas burner according to claim 1, characterized in that, The front end of the gas pipe (4) is positioned directly opposite the cylinder (7); a connecting rod (9) is horizontally positioned between the gas pipe (4) and the cylinder (7), and both ends of the connecting rod (9) are fixedly connected to the gas pipe (4) and the cylinder (7) respectively. A clearance hole is provided on the rear end face of the mixing tank (6) to match the front end of the connecting rod (9) and to allow the front end of the connecting rod (9) to pass through.

5. The gas burner according to claim 4, characterized in that, The mixing tank (6) consists of a cylindrical body (6a) and a baffle (6b) coaxially arranged inside the body (6a), with the baffle (6b) located on the rear side of the cylinder (7); the aforementioned clearance hole and air guide gap (6b1) are both located on the baffle (6b), and the baffle (6b) is fixedly connected to the connecting rod (9); the side wall of the baffle (6b) and the inner wall of the body (6a) are fitted together to form an annular gap.

6. The gas burner according to claim 4 or 5, characterized in that, The cylinder (7) includes a cylindrical impeller (7a) and a guide ring (7b) and a sealing plate (7c) that are respectively pressed against and fixed on the front end face and the rear end face of the cylindrical impeller (7a). The sealing plate (7c) is fixedly connected to the connecting rod (9), and the sealing plate (7c) closes the rear end of the cylindrical impeller (7a). The outlet of the cylindrical impeller (7a) is the air guide port (7a1) mentioned above.

7. The gas burner according to claim 1, characterized in that, The cross-section of the long cylinder (2c) is triangular, and the inner diameter of the long cylinder (2c) gradually decreases from the outside to the inside.

8. The gas burner according to claim 1, characterized in that, A sealing ring (10) is fixed between the rear ring (2b) and the furnace cylinder (1). The sealing ring (10) is located behind the connecting ring (2d), and an annular cavity (11) is formed between the sealing ring (10), the rear ring (2b) and the furnace cylinder (1). The rear end of the gas outlet pipe (5) is fixed on the sealing ring (10) and connects to the annular cavity (11). The gas outlet (4b) also connects to the annular cavity (11).

9. The gas burner according to claim 1, characterized in that, The long cylinder (2c) is pressed onto the main body (6a) and the two are fixedly connected.

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