A burner nozzle

Abstract

The application provides a burner nozzle, relates to the technical field of burner nozzles, and comprises a cylinder, one end of the cylinder is provided with a conical spray hole, the other end of the cylinder is provided with an end cap, a conical adjusting head is movably arranged in the cylinder, the conical adjusting head is coaxially arranged with the conical spray hole and is matched, a transmission assembly that is in transmission connection with the conical adjusting head is arranged in the cylinder, the outer side of the end cap is provided with a driving assembly that is used for driving the transmission assembly to drive the conical adjusting head to reciprocatingly move along the axial direction, an air input pipe is connected to one side of the cylinder, and a fuel input pipe is connected to the end cap; the utility model discloses abandoning the mode that the fixed aperture relies on the indirect adjustment of the injection amount of the external valve in the prior art, directly matching the conical adjusting head with the conical spray hole to realize injection amount regulation and control, eliminating the adjustment lag caused by pipeline transmission, and being capable of quickly responding to the dynamic change of the combustion working condition.

Description

Technical Field

[0001] This application relates to the field of burner nozzle technology, and more specifically, to a burner nozzle. Background Technology

[0002] In fields such as industrial heating, boiler combustion, and gas-fired power equipment, the burner nozzle, as the core component for fuel injection and mixing, directly determines the fuel injection volume, atomization effect, and combustion efficiency based on its orifice size.

[0003] Most existing burner nozzles adopt a fixed orifice design, and their injection quantity adjustment relies on external valves to control the total fuel flow indirectly. However, there is a pipeline transmission distance between the external valve and the nozzle, and changes in fuel flow must be transported through the pipeline before they can act on the nozzle injection, resulting in a significant lag in injection quantity adjustment and difficulty in quickly responding to dynamic changes in combustion conditions. Summary of the Invention

[0004] The purpose of this application is to provide a burner nozzle that can solve the technical problems mentioned in the background art.

[0005] This application provides a burner nozzle, including a cylindrical body. One end of the cylindrical body is provided with a conical nozzle, and the other end of the cylindrical body is provided with a sealing cap. A conical adjusting head is movably disposed inside the cylindrical body. The conical adjusting head is coaxially arranged and adapted to the conical nozzle. A transmission assembly is provided inside the cylindrical body and is pulsatorically connected to the conical adjusting head. A drive assembly is provided on the outside of the sealing cap for driving the transmission assembly to move the conical adjusting head axially back and forth. An air input pipe is connected to one side of the cylindrical body, and a fuel input pipe is connected to the sealing cap.

[0006] Furthermore, the transmission assembly includes a perforated plate, a rotating shaft, and a threaded transmission sleeve. The perforated plate is fixedly disposed within the cylinder. The rotating shaft passes through the perforated plate and is rotatably connected to it. One end of the rotating shaft movably passes through the end cap and is connected to the drive assembly. The other end of the rotating shaft is threaded, and the rotating shaft is threadedly connected to the threaded transmission sleeve through this thread. The threaded transmission sleeve is fixedly connected to the tapered adjusting head. A set of guide rods is provided on the side of the perforated plate near the threaded transmission sleeve. The threaded transmission sleeve is provided with guide holes that are adapted to the guide rods, and the guide rods are inserted into the guide holes.

[0007] Furthermore, the drive assembly includes a drive motor and a mounting base. The mounting base is fixed to the outside of the end cap, the drive motor is fixed to the mounting base, and the output shaft of the drive motor is connected to the outer end of the rotating shaft via a coupling.

[0008] Furthermore, the conical adjusting head is covered with a high-temperature resistant sealing sleeve.

[0009] Furthermore, a swirling assembly is fixedly installed inside the cylinder. The swirling assembly includes an inner ring, an outer ring, and multiple spiral plates. The multiple spiral plates are evenly fixed between the inner ring and the outer ring. The outer ring is fixed to the inner wall of the cylinder. The rotating shaft passes through the inner ring and is rotatably connected to the inner ring. The rotating shaft is provided with a first limiting ring and a second limiting ring, which are respectively located on both sides of the swirling assembly.

[0010] Furthermore, the cylinder is provided with a flow cavity, the flow cavity is provided with a separator cylinder, one end of the separator cylinder is fixedly connected to the inner side of the end cap, a channel is provided between the separator cylinder and the inner wall of the flow cavity, and the air input pipe is connected to the flow cavity.

[0011] Furthermore, the cylinder body is provided with an acceleration cylinder, which is sleeved on the rotating shaft. The fuel input pipe is connected to the acceleration cylinder. A channel is provided between the outer wall of the acceleration cylinder and the inner wall of the cylinder body. The acceleration cylinder is provided with a contraction section, a throat, and an expansion section in sequence along the fuel flow direction.

[0012] The beneficial effects of this utility model are:

[0013] This invention abandons the existing technology of relying on external valves to indirectly adjust the injection volume with a fixed orifice diameter. Instead, it achieves injection volume control through the direct cooperation between the conical adjusting head and the conical spray orifice, eliminating the adjustment lag caused by pipeline transmission and enabling rapid response to dynamic changes in combustion conditions. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 These are schematic diagrams of structures in some embodiments of this application;

[0016] Figure 2 These are cross-sectional views of some embodiments of this application;

[0017] Figure 3 This is a partial cross-sectional view of the structure in some embodiments of this application;

[0018] The reference numerals in the attached figures are as follows:

[0019] 1. Cylinder body; 2. Conical nozzle; 3. End cap; 4. Conical adjusting head; 41. High-temperature resistant sealing sleeve; 5. Transmission assembly; 51. Perforated plate; 511. Guide rod; 52. Rotating shaft; 53. Threaded transmission sleeve; 531. Guide hole; 6. Drive assembly; 61. Drive motor; 62. Mounting base; 7. Air input pipe; 8. Fuel input pipe; 9. Swirl assembly; 91. Inner ring; 92. Outer ring; 93. Spiral plate; 10. Separator cylinder; 11. Accelerator cylinder; 12. Contraction section; 13. Throat; 14. Expansion section. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific Implementation

[0026] like Figure 1-3 As shown, this application provides a burner nozzle, including a cylindrical body 1. One end of the cylindrical body 1 is provided with a conical nozzle 2, and the other end of the cylindrical body 1 is provided with a sealing cap 3. A conical adjusting head 4 is movably disposed inside the cylindrical body 1. The conical adjusting head 4 is coaxially arranged and adapted to the conical nozzle 2. A transmission assembly 5 is provided inside the cylindrical body 1 and is drively connected to the conical adjusting head 4. A drive assembly 6 is provided on the outside of the sealing cap 3 for driving the transmission assembly 5 to move the conical adjusting head 4 axially back and forth. An air input pipe 7 is connected to one side of the cylindrical body 1, and a fuel input pipe 8 is connected to the sealing cap 3. The drive assembly 6 drives the transmission assembly 5 to move the conical adjusting head 4 axially back and forth. The conical adjusting head 4, which is coaxially adapted to the conical nozzle 2, moves axially back and forth. When the conical adjusting head 4 moves toward the conical nozzle 2, the effective flow orifice formed by the two shrinks, and the fuel injection amount decreases. When the conical adjusting head 4 moves away from the conical nozzle 2, the effective flow orifice increases, and the fuel injection amount increases, thus achieving direct control of the injection amount. This eliminates the method of indirectly adjusting the injection amount by relying on external valves with a fixed orifice in the existing technology. The injection amount is controlled by the direct cooperation between the conical adjusting head 4 and the conical nozzle 2, eliminating the adjustment lag caused by pipeline transmission and enabling rapid response to dynamic changes in combustion conditions.

[0027] like Figure 2 and Figure 3As shown, the transmission assembly 5 includes a perforated plate 51, a rotating shaft 52, and a threaded transmission sleeve 53. The perforated plate 51 is fixed inside the cylinder 1. The rotating shaft 52 passes through the perforated plate 51 and is rotatably connected to it. One end of the rotating shaft 52 movably passes through the end cap 3 and is connected to the drive assembly 6. The other end of the rotating shaft 52 is threaded, and the rotating shaft 52 is threaded to the threaded transmission sleeve 53 through this thread. The threaded transmission sleeve 53 is fixedly connected to the conical adjusting head 4. A set of guide rods 511 is provided on the side of the perforated plate 51 near the threaded transmission sleeve 53. The threaded transmission sleeve 53 is provided with guide rods 511. The guide rod 511 is fitted with a guide hole 531, and the guide rod 511 is inserted into the guide hole 531. When the drive assembly 6 drives the rotating shaft 52 to rotate, the rotational motion of the rotating shaft 52 is converted into the axial linear motion of the threaded transmission sleeve 53, which in turn drives the conical adjusting head 4, which is fixedly connected to the threaded transmission sleeve 53, to move back and forth along the axial direction. The setting of the guide rod 511 and the guide hole 531 makes the threaded transmission sleeve 53 move stably along the axial direction. The setting of the perforated plate 51 provides support for the rotating shaft 52 on the one hand, and improves the mixing effect of air and fuel entering the cylinder 1 on the other hand.

[0028] like Figure 2 and Figure 3 As shown, the drive assembly 6 includes a drive motor 61 and a mounting base 62. The mounting base 62 is fixed to the outside of the end cap 3, and the drive motor 61 is fixed to the mounting base 62. The output shaft of the drive motor 61 is connected to the outer end of the rotating shaft 52 through a coupling. Specifically, a sealing ring is provided at the connection between the rotating shaft 52 and the end cap 3. The rotating shaft 52 is driven to rotate by the drive motor 61. The rotational motion of the rotating shaft 52 is converted into the axial linear motion of the threaded transmission sleeve 53 through the threaded transmission and the limiting action of the guide rod 511, thereby driving the conical adjusting head 4 to move back and forth axially.

[0029] like Figure 2 and Figure 3 As shown, a high-temperature resistant sealing sleeve 41 is provided on the conical adjusting head 4; when the conical adjusting head 4 moves toward and abuts the conical spray hole 2, the high-temperature resistant sealing sleeve 41 can effectively seal the gap between the conical adjusting head 4 and the conical spray hole 2.

[0030] like Figure 2 and Figure 3As shown, a swirl assembly 9 is fixed inside the cylinder 1. The swirl assembly 9 includes an inner ring 91, an outer ring 92, and multiple spiral plates 93. The multiple spiral plates 93 are evenly fixed between the inner ring 91 and the outer ring 92. The outer ring 92 is fixed on the inner wall of the cylinder 1. A rotating shaft 52 passes through the inner ring 91 and is rotatably connected to the inner ring 91. A first limiting ring and a second limiting ring are provided on the rotating shaft 52. The first limiting ring and the second limiting ring are respectively located on both sides of the swirl assembly 9. Air enters the cylinder 1 through the air input pipe 7, and fuel enters the cylinder 1 through the fuel input pipe 8. After entering the cylinder 1, the fuel enters the downstream area (between the swirl assembly 9 and the perforated plate 51) through the swirl assembly 9. The fuel is fully mixed in the downstream area and then sprayed out from the conical nozzle 2 through the perforated plate 51. The setting of the swirl assembly 9 further improves the mixing effect of air and fuel.

[0031] like Figure 2 and Figure 3 As shown, a flow chamber is provided on the cylinder 1, and a partition cylinder 10 is provided in the flow chamber. One end of the partition cylinder 10 is fixedly connected to the inner side of the end cap 3. A channel is provided between the partition cylinder 10 and the inner wall of the flow chamber. An air inlet pipe 7 is connected to the flow chamber. After the air enters the flow chamber of the cylinder 1 through the air inlet pipe 7, it is directionally transported through the channel between the partition cylinder 10 and the inner wall of the flow chamber, forming a protective layer in the cylinder 1. The cold air absorbs heat and reduces the temperature of the cylinder 1.

[0032] like Figure 2 and Figure 3 As shown, an acceleration cylinder 11 is provided inside the cylinder body 1. The acceleration cylinder 11 is sleeved on the rotating shaft 52. The fuel input pipe 8 is connected to the acceleration cylinder 11. A channel is provided between the outer wall of the acceleration cylinder 11 and the inner wall of the cylinder body 1. The acceleration cylinder 11 is provided with a converging section 12, a throat 13 and an expanding section 14 in sequence along the fuel flow direction. After the fuel enters the acceleration cylinder 11 through the fuel input pipe 8, it flows along the Venturi structure formed by the converging section 12, the throat 13 and the expanding section 14 inside the cylinder, thereby accelerating the fuel and further improving the mixing effect of fuel and air.

[0033] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A burner nozzle, characterized in that: The device includes a cylindrical body, one end of which is provided with a conical nozzle, and the other end of which is provided with an end cap. A conical adjusting head is movably disposed inside the cylindrical body. The conical adjusting head is coaxially arranged and adapted to the conical nozzle. A transmission assembly is provided inside the cylindrical body and is pulsatorically connected to the conical adjusting head. A drive assembly is provided on the outside of the end cap for driving the transmission assembly to move the conical adjusting head axially back and forth. An air input pipe is connected to one side of the cylindrical body, and a fuel input pipe is connected to the end cap.

2. A burner nozzle according to claim 1, characterized in that: The transmission assembly includes a perforated plate, a rotating shaft, and a threaded transmission sleeve. The perforated plate is fixed inside the cylinder. The rotating shaft passes through the perforated plate and is rotatably connected to it. One end of the rotating shaft movably passes through the end cap and is connected to the drive assembly. The other end of the rotating shaft is threaded, and the rotating shaft is threadedly connected to the threaded transmission sleeve through the thread. The threaded transmission sleeve is fixedly connected to the tapered adjusting head. A set of guide rods is provided on the side of the perforated plate near the threaded transmission sleeve. The threaded transmission sleeve is provided with guide holes that are adapted to the guide rods, and the guide rods are inserted into the guide holes.

3. A burner nozzle according to claim 2, characterized in that: The drive assembly includes a drive motor and a mounting base. The mounting base is fixed to the outside of the end cap, and the drive motor is fixed to the mounting base. The output shaft of the drive motor is connected to the outer end of the rotating shaft via a coupling.

4. A burner nozzle according to claim 1, characterized in that: The conical adjusting head is covered with a high-temperature resistant sealing sleeve.

5. A burner nozzle according to claim 2, characterized in that: A swirling assembly is fixedly installed inside the cylinder. The swirling assembly includes an inner ring, an outer ring, and multiple spiral plates. The multiple spiral plates are evenly fixed between the inner ring and the outer ring. The outer ring is fixed on the inner wall of the cylinder. A rotating shaft passes through the inner ring and is rotatably connected to the inner ring. A first limiting ring and a second limiting ring are provided on the rotating shaft. The first limiting ring and the second limiting ring are respectively located on both sides of the swirling assembly.

6. A burner nozzle according to claim 1, characterized in that: The cylinder is provided with a flow cavity, the flow cavity is provided with a separator cylinder, one end of the separator cylinder is fixedly connected to the inner side of the end cap, a channel is provided between the separator cylinder and the inner wall of the flow cavity, and the air input pipe is connected to the flow cavity.

7. A burner nozzle according to claim 2, characterized in that: The cylinder body is provided with an acceleration cylinder, which is sleeved on the rotating shaft. The fuel input pipe is connected to the acceleration cylinder. A channel is provided between the outer wall of the acceleration cylinder and the inner wall of the cylinder body. The acceleration cylinder is provided with a contraction section, a throat, and an expansion section in sequence along the fuel flow direction.

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