Fuel gas jet burner with premixing cavity

Abstract

The utility model discloses a gas jet burner with a premixing cavity, which comprises a burning head and a gas pipe, the bottom end of the burning head is provided with a cavity, the bottom end of the burning head is provided with a gas jet box through a plurality of screws, the gas pipe is communicated with the gas jet box, the gas jet box is rotatably connected with a rotating shaft, and the outside of the rotating shaft is fixedly connected with a plurality of round partition plates. A plurality of circular partition plates are arranged in the cavity and divide the interior of the cavity into a plurality of mixing cavities, a plurality of first air spraying openings are evenly formed in the circular partition plates, a plurality of second air spraying openings communicating with the mixing cavities are formed in the combustion head, and a fixing cover is fixedly connected to the position, corresponding to the second air spraying openings, of the outer portion of the combustion head. The fuel gas is uniformly sprayed into the multiple mixing cavities in sequence, and is mixed with the air uniformly sprayed into the mixing cavities, so that the fuel gas and the air are fully mixed, the mixing path and time of the fuel gas and the air are increased, the mixing area of the fuel gas and the air is increased, and the mixing effect of the fuel gas and the air is ensured.

Description

Technical Field

[0001] This utility model relates to the field of gas burner technology, and more specifically, to a gas injection burner with a premixing chamber. Background Technology

[0002] For gas burners, the degree of mixing between gas and air before combustion is a crucial factor affecting combustion performance. Insufficient mixing can lead to incomplete combustion, unstable combustion, high combustion noise, and high pollutant emissions.

[0003] A search revealed that Chinese utility model patent application number CN201521126885.6 discloses a gas reverse-wind injection mixed gas burner, including a burner head, a gas pipe, a duct, a fan, and a nozzle. The utility model is characterized in that the fan is connected to the lower end of the duct, the burner head is connected to the upper end of the duct, the gas pipe passes through the duct wall and enters the duct, and the nozzle is connected to the outlet end of the gas pipe. The outlet of the gas pipe faces downwards, and the gas sprayed by the nozzle is against the wind direction.

[0004] It enhances the mixing effect of fuel and air by making the gas ejected from the nozzle and the air blown out by the fan go in opposite directions. However, the gas ejected from the nozzle comes into brief contact with the air before being ejected from the burner. The contact time between the gas and air is short and the contact area between the gas and air is limited, resulting in a relatively poor mixing effect. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a gas injection burner with a premixing chamber, which solves the technical problems mentioned in the background art, where the gas injected from the inside of the nozzle comes into brief contact with the air before being injected from the inside of the burner, resulting in a short contact time between the gas and the air, a limited contact area between the gas and the air, and a relatively poor mixing effect between the gas and the air.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a gas injection burner with a premixing chamber, comprising a burner head and a gas pipe. The burner head has a cavity at its bottom end, and a jet box is mounted on the bottom end of the burner head via multiple screws. The gas pipe communicates with the jet box. A rotating shaft is rotatably connected to the jet box, and multiple circular partitions are fixedly connected to the outside of the rotating shaft. The multiple circular partitions divide the interior of the cavity into multiple mixing chambers. Multiple first jet ports are evenly arranged on each of the multiple circular partitions. The burner head has multiple second jet ports communicating with the multiple mixing chambers. A fixing cover is fixedly connected to the outside of the burner head at positions corresponding to the multiple second jet ports. The bottom end of the fixing cover is connected to a gas distribution box via multiple connecting pipes. The bottom end of the gas distribution box is connected to a fan via a gas supply pipe. Gas is sequentially and evenly injected into the interior of the multiple mixing chambers, and the gas mixes with the air evenly injected into the mixing chambers. This increases the path and time for gas-air mixing, increases the mixing area for gas-air mixing, facilitates thorough mixing of gas and air, and ensures the effective mixing of gas and air.

[0009] The present invention is further configured such that the inside of the jet box is provided with a ventilation chamber, and the top of the jet box is provided with multiple third jet ports communicating with the ventilation chamber, so that the gas can be evenly sprayed into the inside of the chamber through the multiple third jet ports.

[0010] The present invention is further provided that a sealing gasket is provided between the jet box and the burner head to ensure the sealing of the connection between the jet box and the burner head.

[0011] The present invention is further configured such that the gas transmission pipe includes two vertical pipes and a U-shaped pipe, the two vertical pipes are respectively connected to both ends of the U-shaped pipe, and the two vertical pipes are respectively connected to the fan and the gas distribution box.

[0012] The present invention is further configured such that a first valve is installed on the U-shaped tube to facilitate control of the amount of air flowing inside the vent pipe.

[0013] The present invention is further configured such that a connecting shaft is fixedly connected to the rotating shaft of the fan, the connecting shaft is rotatably and sealed to the ventilation box and the U-shaped pipe, and the top end of the connecting shaft is fixedly connected to the bottom end of the rotating shaft, so as to facilitate the fan to drive the rotating shaft to rotate.

[0014] The present invention is further configured such that multiple stirring plates are fixedly connected to the outside of the rotating shaft, and the multiple stirring plates are respectively located inside multiple mixing chambers, so as to facilitate the stirring of the gas and air inside the multiple mixing chambers.

[0015] The present invention is further provided that a second valve is installed on the gas pipe to facilitate control of the gas flow rate inside the gas pipe.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a gas injection burner with a premixing chamber, which has the following advantages:

[0018] 1. The gas is evenly injected into the interior of multiple mixing chambers through multiple first jet nozzles on multiple circular partitions. The air is evenly delivered into the interior of the fixed cover through the gas supply pipe, gas distribution box and multiple connecting pipes by the operation of the fan. It is also evenly injected into the interior of multiple mixing chambers through multiple second jet nozzles. This facilitates multiple mixing of gas and air, increases the mixing path and time of gas and air, increases the mixing area of ​​gas and air, and facilitates full mixing of gas and air to ensure the mixing effect of gas and air.

[0019] 2. During the operation of the blower, the blower drives the connecting shaft, rotating shaft, multiple circular baffles and multiple stirring plates to rotate. As the circular baffles rotate, the gas ejected from multiple first jet nozzles is evenly sprayed into the interior of the corresponding mixing chamber. At the same time, the stirring plates stir the gas and air inside the mixing chamber, so as to make the gas and air fully mixed.

[0020] 3. Since the vent pipe consists of two vertical pipes and a U-shaped pipe, it is convenient to install the first valve. The first valve facilitates the adjustment of the amount of air flowing from inside the vent pipe, and the second valve facilitates the adjustment of the amount of gas flowing from inside the gas pipe. This makes it easy to control the amount of air and gas delivered to the cavity and to adjust the gas-air mixing ratio as needed. Attached Figure Description

[0021] Figure 1 This is a front view of a gas injection burner with a premixing chamber according to the present invention.

[0022] Figure 2 This is a schematic diagram of the combustion head in this utility model;

[0023] Figure 3 This is a partial cross-sectional structural diagram showing the connection between the combustion head, jet box, rotating shaft, multiple circular partitions, and multiple stirring plates in this utility model.

[0024] Figure 4 This is a structural diagram showing the connection between the jet box, rotating shaft, multiple circular partitions, multiple stirring plates, air distribution box, air delivery pipe and fan in this utility model;

[0025] Figure 5 This is a cross-sectional structural diagram of the jet box in this utility model.

[0026] In the diagram: 1. Burner head; 2. Gas pipe; 3. Cavity; 4. Screw; 5. Injection box; 6. Shaft; 7. Circular partition; 8. Mixing chamber; 9. First injection port; 10. Second injection port; 11. Fixing cover; 12. Connecting pipe; 13. Gas distribution box; 14. Gas delivery pipe; 15. Fan; 16. Ventilation chamber; 17. Third injection port; 18. Sealing gasket; 19. Vertical pipe; 20. U-shaped pipe; 21. First valve; 22. Connecting shaft; 23. Stirring plate; 24. Second valve. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-5A gas injection burner with a premixing chamber includes a burner head 1 and a gas pipe 2. A cavity 3 is provided at the bottom end of the burner head 1. A jet box 5 is mounted to the bottom end of the burner head 1 via multiple screws 4. A sealing gasket 18 is provided between the jet box 5 and the burner head 1 to ensure a tight seal between them. The gas pipe 2 communicates with the jet box 5. A rotating shaft 6 is rotatably connected to the jet box 5. Multiple circular partitions 7 are fixedly connected to the outside of the rotating shaft 6, dividing the interior of the cavity 3 into multiple mixing chambers 8. Multiple first jet ports 9 are evenly distributed on each of the circular partitions 7. Multiple second jet ports 10 are provided on the burner head 1, communicating with the multiple mixing chambers 8. A fixing cover 11 is fixedly connected to the outside of the burner head 1 at positions corresponding to the multiple second jet ports 10. The bottom end of the cover 11 is connected to a gas distribution box 13 through multiple connecting pipes 12. The bottom end of the gas distribution box 13 is connected to a fan 15 through a gas supply pipe 14. A connecting shaft 22 is fixedly connected to the rotating shaft 6 of the fan 15. The connecting shaft 22 is rotatably connected to the ventilation box and the U-shaped pipe 20. The top end of the connecting shaft 22 is fixedly connected to the bottom end of the rotating shaft 6, so that the fan 15 can drive the rotating shaft 6 to rotate. Multiple stirring plates 23 are fixedly connected to the outside of the rotating shaft 6. The multiple stirring plates 23 are located inside multiple mixing chambers 8, so as to facilitate the stirring of the gas and air inside the multiple mixing chambers 8. The inside of the jet box 5 is provided with a ventilation chamber 16. The top end of the jet box 5 is provided with multiple third jet ports 17 that communicate with the ventilation chamber 16, so that the gas can be evenly sprayed into the cavity 3 through the multiple third jet ports 17.

[0031] Specifically, the gas is evenly sprayed into the interior of multiple mixing chambers 8 through multiple first jet nozzles 9 on multiple circular baffles 7. The air is evenly transported into the interior of the fixed cover 11 through the gas supply pipe 14, the gas distribution box 13, and multiple connecting pipes 12 by the operation of the fan 15, and is evenly sprayed into the interior of multiple mixing chambers 8 through multiple second jet nozzles 10. This facilitates multiple mixing of gas and air, increases the mixing path and time of gas and air, increases the mixing area of ​​gas and air, and facilitates thorough mixing of gas and air, ensuring the mixing effect of gas and air. During the operation of the fan 15, the fan 15 drives the connecting shaft 22, the rotating shaft 6, the multiple circular baffles 7 and the multiple stirring plates 23 to rotate. As the circular baffles 7 rotate, the gas sprayed from the multiple first jet nozzles 9 is evenly sprayed into the interior of the corresponding mixing chambers 8. At the same time, the stirring plates 23 stir the gas and air inside the mixing chambers 8, which facilitates thorough mixing of gas and air.

[0032] Please see Figure 1The gas transmission pipe 14 includes two vertical pipes 19 and a U-shaped pipe 20. The two vertical pipes 19 are connected to both ends of the U-shaped pipe 20, and the two vertical pipes 19 are connected to the fan 15 and the gas distribution box 13, respectively. A first valve 21 is installed on the U-shaped pipe 20 to control the amount of air flowing inside the gas transmission pipe 14. A second valve 24 is installed on the gas pipe 2 to control the amount of gas flowing inside the gas pipe 2.

[0033] Specifically, since the gas supply pipe 14 consists of two vertical pipes 19 and a U-shaped pipe 20, it is convenient to install the first valve 21. The first valve 21 facilitates the corresponding adjustment of the amount of air flowing from the inside of the gas supply pipe 14, and the second valve 24 facilitates the corresponding adjustment of the amount of gas flowing from the inside of the gas pipe 2. This facilitates the control of the amount of air and gas delivered to the cavity 3, and facilitates the corresponding adjustment of the gas and air mixing ratio as needed.

[0034] In summary, when using the overall equipment:

[0035] Gas is delivered to the interior of the jet box 5 through the gas pipe 2, and evenly sprayed into the interior of the mixing chamber 8 located on the lower side through multiple third jet nozzles 17. Gas is also evenly sprayed into the interior of the corresponding mixing chamber 8 through multiple first jet nozzles 9 on the circular partition 7. At the same time, the blower 15 operates to deliver air through the gas supply pipe 14, the gas distribution box 13, and multiple connecting pipes 12 to the interior of the fixed cover 11, and evenly sprayed into the interior of multiple mixing chambers 8 through multiple second jet nozzles 10. Meanwhile, the blower 15 drives the connecting shaft 22, the rotating shaft 6, the multiple circular partitions 7, and the multiple stirring plates 23 to rotate. As the circular partitions 7 rotate, the gas ejected from the multiple first jet nozzles 9 is evenly sprayed into the interior of the corresponding mixing chamber 8. At the same time, the stirring plates 23 stir the gas and air inside the mixing chamber 8, so that the gas and air are fully mixed. The evenly mixed gas is ejected from the interior of the burner head 1 and burned.

[0036] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A gas injection burner with a premixing chamber, comprising a burner head (1) and a gas pipe (2), characterized in that: The burner head (1) has a cavity (3) at its bottom end. The burner head (1) is fitted with a jet box (5) by multiple screws (4). The gas pipe (2) is connected to the jet box (5). A rotating shaft (6) is rotatably connected to the jet box (5). Multiple circular partitions (7) are fixedly connected to the outside of the rotating shaft (6). The multiple circular partitions (7) divide the interior of the cavity (3) into multiple mixing chambers (8). Multiple first jet ports (9) are evenly arranged on the multiple circular partitions (7). The burner head (1) is fitted with multiple second jet ports (10) that are connected to the multiple mixing chambers (8). A fixed cover (11) is fixedly connected to the outside of the burner head (1) at the position corresponding to the multiple second jet ports (10). The bottom end of the fixed cover (11) is connected to a gas distribution box (13) by multiple connecting pipes (12). The bottom end of the gas distribution box (13) is connected to a fan (15) by a gas supply pipe (14).

2. A gas injection burner with a premixing chamber according to claim 1, characterized in that: The jet box (5) has an internal ventilation chamber (16) and a plurality of third jet ports (17) communicating with the ventilation chamber (16) are provided at the top of the jet box (5).

3. A gas injection burner with a premixing chamber according to claim 1, characterized in that: A sealing gasket (18) is provided between the jet box (5) and the burner head (1).

4. A gas injection burner with a premixing chamber according to claim 1, characterized in that: The gas transmission pipe (14) includes two vertical pipes (19) and a U-shaped pipe (20). The two vertical pipes (19) are connected to both ends of the U-shaped pipe (20) respectively, and the two vertical pipes (19) are connected to the fan (15) and the gas distribution box (13) respectively.

5. A gas injection burner with a premixing chamber according to claim 4, characterized in that: The first valve (21) is installed on the U-shaped tube (20).

6. A gas injection burner with a premixing chamber according to claim 1, characterized in that: A connecting shaft (22) is fixedly connected to the rotating shaft of the fan (15). The connecting shaft (22) is sealed and rotatably connected to the ventilation box and the U-shaped pipe (20). The top end of the connecting shaft (22) is fixedly connected to the bottom end of the rotating shaft (6).

7. A gas injection burner with a premixing chamber according to claim 1, characterized in that: Multiple stirring plates (23) are fixedly connected to the outside of the rotating shaft (6), and the multiple stirring plates (23) are located inside the multiple mixing chambers (8).

8. A gas injection burner with a premixing chamber according to claim 1, characterized in that: A second valve (24) is installed on the gas pipe (2).

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