Adjustable center fire structure

Abstract

The utility model relates to the technical field of combustors, and discloses an adjustable central fire structure which comprises a central gas assembly, a central air assembly and a spinning disk group mechanism, the central gas assembly is provided with a driving gear, a driven rack, a central gas inlet, a central gas pipeline, a central gas nozzle, a transmission shaft and a plurality of limiting guide rails, the central air assembly is provided with an air inlet pore plate, a central air pipeline I, a central air pipeline II and a central fire gathering cover; the spinning disk group mechanism is provided with a set screw, a spinning disk group sleeve and a spinning disk body; by means of the center gas assembly, the center air assembly and the spinning disk set mechanism, when working conditions change, the combustion position of gas can be adjusted conveniently, so that the length of a fire gathering section is changed, stability of center flames is kept conveniently, a spinning disk body and a spinning disk set sleeve can be adjusted corresponding to the relative position of a center gas spray head, and the stability of the center flames is improved. And the generation of thermal Nox can be inhibited while the central flame is stabilized.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, specifically to an adjustable center flame structure. Background Technology

[0002] In existing low-NOx burners, the flame intensity is generally weak and relatively dispersed in order to suppress the formation of high-temperature NOx. Therefore, the stability of the center flame, which is the standby flame, is crucial to ensure the stability of the flame.

[0003] Existing burners lack a mechanism to adjust the center structure when operating conditions change. When operating conditions change, the stability of the center flame will be affected, thus affecting the stability of the entire burner. Designing a center flame structure that can be adjusted according to changes in operating conditions is a problem that needs to be solved. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable center fire structure, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An adjustable center flame structure includes a center gas assembly, a center air assembly, and a swirl vane assembly mechanism. The center gas assembly has a driving gear, a driven rack, a center gas inlet, a center gas pipeline, a center gas nozzle, a drive shaft, and several limiting guide rails.

[0007] The central air assembly includes an air inlet orifice plate, a central air duct one, a central air duct two, and a central flame hood. The air inlet orifice plate is fixedly installed at the front end of the central air duct one, the central air duct two is fixedly installed at the rear end of the central air duct one, and the central flame hood is fixedly installed at the rear end of the central air duct two.

[0008] Several limiting guide rails are fixedly installed on the outer ring of the central gas inlet, and the limiting guide rails are equidistantly arranged on the central gas inlet. The front and rear ends of the air inlet orifice plate are provided with sliding grooves that adapt to the central gas inlet and the limiting guide rails. The central gas inlet is slidably installed in the sliding grooves of the air inlet orifice plate through the limiting guide rails. The driven rack is fixedly installed on the top of the central gas inlet. The driving gear is installed on one side of the driven rack. The transmission shaft is fixedly installed on the top of the driving gear at the center position. The central gas pipeline is fixedly installed at the rear end of the central gas inlet. The central gas nozzle is installed at the rear end of the central gas pipeline.

[0009] Preferably, the driving gear meshes with the driven rack, and the center points of the air inlet orifice plate, the central air duct, the central gas inlet, and the central gas nozzle are on the same straight line.

[0010] Preferably, the central gas pipeline and the central gas inlet are both hollow cylindrical, and the rear of the central flame hood has several through holes.

[0011] Preferably, the swirl vane assembly mechanism has a set bolt, a swirl vane assembly sleeve, and several swirl vane bodies. The several swirl vane bodies are equidistantly distributed on the outer ring of the swirl vane assembly sleeve, and the swirl vane bodies and the swirl vane assembly sleeve are fixedly connected.

[0012] Preferably, the swirl vane assembly sleeve is slidably installed on the outer ring of the central gas pipeline, and a locking hole is provided on one side of the swirl vane assembly sleeve, the locking hole being threaded to match the set bolt.

[0013] Preferably, the swirl vane body is adapted to match the central gas nozzle, the set bolt is threaded in the locking hole, and the end of the set bolt abuts against the outer ring of the central gas pipeline, and the center point of the swirl vane assembly sleeve is on the same straight line as the center point of the central gas nozzle.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention features a central gas assembly, a central air assembly, and a swirl vane group that work together. By adding a central gas position adjustment mechanism to the central gas assembly, when operating conditions change, the drive shaft is turned to rotate the drive gear, which in turn moves the central gas inlet back and forth along the axis of the air inlet orifice plate. This adjusts the combustion position of the gas ejected from the central gas nozzle, thereby changing the length of the flame-gathering section and facilitating the stability of the central flame.

[0016] By setting up a swirl vane assembly mechanism in conjunction with the central gas assembly, the relative positions of the swirl vane body and the swirl vane assembly sleeve can be adjusted to correspond to the central gas nozzle during combustion. When operating conditions change, the position of the central recirculation zone can be changed to stabilize the central flame while suppressing the generation of thermal NOx.

[0017] By connecting the drive shaft of an external servo drive device to the transmission shaft, the servo drive device can be started according to changes in working conditions, thereby automatically driving the transmission shaft to rotate for adjustment, which improves the functionality of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an adjustable central fire structure in an embodiment of the present invention;

[0019] Figure 2 This is a front view of the structure of the central gas assembly, central air assembly, and swirl vane group mechanism in this embodiment of the present invention;

[0020] Figure 3 As an embodiment of this utility model Figure 1 A structural sectional view.

[0021] In the diagram: 10. Central gas assembly; 11. Drive gear; 12. Driven rack; 13. Central gas inlet; 14. Limiting guide rail; 15. Central gas pipeline; 16. Central gas nozzle; 17. Drive shaft; 20. Central air assembly; 21. Air inlet orifice plate; 22. Central air pipeline one; 23. Central air pipeline two; 24. Central flame hood; 30. Swirl vane assembly mechanism; 31. Set bolt; 32. Swirl vane assembly sleeve; 33. Swirl vane body. Detailed Implementation

[0022] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Combination Figures 1-3 An adjustable center flame structure includes a center gas assembly 10, a center air assembly 20, and a swirl vane assembly 30. The center gas assembly 10 has a drive gear 11, a driven rack 12, a center gas inlet 13, a center gas pipe 15, a center gas nozzle 16, a drive shaft 17, and several limiting guide rails 14.

[0025] See Figure 2 and Figure 3 Furthermore, the central air assembly 20 has an air inlet orifice plate 21, a central air duct 1 22, a central air duct 23, and a central flame hood 24. The air inlet orifice plate 21 is fixedly installed at the front end of the central air duct 1 22, the central air duct 23 is fixedly installed at the rear end of the central air duct 1 22, and the central flame hood 24 is fixedly installed at the rear end of the central air duct 23. Several limiting guide rails 14 are fixedly installed on the outer ring of the central gas inlet 13, and the limiting guide rails 14 are equidistantly arranged on the central gas inlet 13. The air inlet orifice plate 21 has a groove at the center of the front and rear ends that is compatible with the central gas inlet 13 and the limiting guide rails 14. The central gas inlet 13 is slidably installed in the groove of the air inlet orifice plate 21 through the limiting guide rails 14.

[0026] Driven rack 12 is fixedly installed at the top of central gas inlet 13, drive gear 11 is installed on one side of driven rack 12, drive shaft 17 is fixedly installed at the top center of drive gear 11, central gas pipe 15 is fixedly installed at the rear end of central gas inlet 13, central gas nozzle 16 is installed at the rear end of central gas pipe 15, drive gear 11 meshes with driven rack 12, the center points of air inlet orifice plate 21, central air pipe 22, central gas inlet 13, and central gas nozzle 16 are on the same straight line, central gas pipe 15 and central gas inlet 13 are both hollow cylindrical, and several through holes are opened at the rear of central flame hood 24.

[0027] Specifically, the air inlet orifice plate 21, central air duct 1 22, and central air duct 23 work together to deliver the air required for combustion to the central gas nozzle 16. Then, the central gas inlet 13 connects to an external gas delivery pipe, allowing gas to be delivered to the central gas nozzle 16 for combustion. Turning the drive shaft 17 rotates the drive gear 11. Since the central gas inlet 13 is slidably mounted on the air inlet orifice plate 21 via a limiting guide rail 14 and is connected to the driven rack 12, the drive gear 11 and driven rack 12 mesh to drive the central gas inlet 13 to move back and forth along the central axis of the air inlet orifice plate 21, thereby adjusting the combustion position of the central gas nozzle 16 to adapt to changes in operating conditions. During adjustment, the limiting guide rail 14 provides guidance and limitation, improving adjustment stability.

[0028] Example 2

[0029] See Figure 2 and Figure 3 Furthermore, based on Embodiment 1, the swirl vane assembly mechanism 30 further includes a set bolt 31, a swirl vane assembly sleeve 32, and several swirl vane bodies 33. The several swirl vane bodies 33 are equidistantly distributed on the outer ring of the swirl vane assembly sleeve 32, and the swirl vane bodies 33 and the swirl vane assembly sleeve 32 are fixedly connected. The swirl vane assembly sleeve 32 is slidably installed on the outer ring of the central gas pipeline 15. A locking hole is provided on one side of the swirl vane assembly sleeve 32, and the locking hole is threadedly matched with the set bolt 31. The swirl vane bodies 33 are adaptively matched with the central gas nozzle 16. The set bolt 31 is threadedly installed in the locking hole, and the end of the set bolt 31 abuts against the outer ring of the central gas pipeline 15. The center point of the swirl vane assembly sleeve 32 and the center point of the central gas nozzle 16 are on the same straight line.

[0030] Specifically, when adjusting the position of the central gas nozzle 16, the position of the central recirculation zone can be changed by adjusting the relative position of the swirl vane body 33 to follow the central gas nozzle 16, thereby stabilizing the combustion of the central flame. At the same time, the generation of thermal NOx can be suppressed by adjustment. Since the swirl vane body 33 is slidably installed on the central gas pipeline 15 through the swirl vane assembly sleeve 32, and the swirl vane assembly sleeve 32 is locked on the central gas pipeline 15 by tightening the set bolt 31, the set bolt 31 can be loosened or loosened as needed before use. Then, the swirl vane assembly sleeve 32 can be pushed to slide on the central gas pipeline 15 for adjustment. After adjustment, the set bolt 31 can be tightened again to fix it, so that the initial installation position of the swirl vane body 33 can be adjusted as needed, which provides high flexibility in use.

[0031] In actual operation, the air inlet orifice plate 21, central air pipe one 22, and central air pipe two 23 are coordinated to deliver the air required for combustion to the central gas nozzle 16. Then, the central gas inlet 13 is connected to the external gas delivery pipe to deliver the gas to the central gas nozzle 16 for spraying out to mix with air for combustion. By turning the drive shaft 17, the drive gear 11 can be driven to rotate.

[0032] Because the central gas inlet 13 is slidably mounted on the air inlet orifice plate 21 via the limiting guide rail 14, and the central gas inlet 13 is connected to the driven rack 12, the central gas inlet 13 can be driven to move back and forth along the central axis of the air inlet orifice plate 21 through the meshing transmission of the driving gear 11 and the driven rack 12, thereby adjusting the combustion position of the central gas nozzle 16 so as to adjust according to changes in working conditions. During the adjustment process, the limiting guide rail 14 can improve the adjustment stability.

[0033] When adjusting the position of the central gas nozzle 16, the position of the central recirculation zone can be changed by adjusting the relative position of the swirl vane body 33 following the central gas nozzle 16, so as to stabilize the combustion of the central flame. At the same time, the generation of thermal NOx can be suppressed by adjusting. The swirl vane body 33 is slidably installed on the central gas pipeline 15 through the swirl vane assembly sleeve 32.

[0034] Furthermore, the swirl vane assembly sleeve 32 is installed on the central gas pipeline 15 by tightening the set bolt 31. Before use, the set bolt 31 can be tightened according to actual needs. Then, the swirl vane assembly sleeve 32 can be adjusted by sliding on the central gas pipeline 15. After adjustment, the set bolt 31 can be tightened again to fix it.

[0035] Furthermore, during use, the drive shaft of the external servo device can be connected to the transmission shaft 17 according to actual needs, and the parameters of the external servo device can be set according to the changes in working conditions. When the working conditions change in the future, the external servo device can be started, thereby causing the external drive shaft to rotate, so as to achieve the purpose of automatically driving the transmission shaft 17 to rotate for adjustment, without the need for personnel to rotate the transmission shaft 17 to adjust the combustion position of the central gas nozzle 16.

[0036] Furthermore, the control components and modules used in the aforementioned external servo devices are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve improvements to the software and power supply. That is, after purchasing them on the market, those skilled in the art only need to install and operate them according to the accompanying instruction manual, without requiring creative labor from those skilled in the art.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable center fire structure, characterized in that: It includes a central gas assembly (10), a central air assembly (20), and a swirl vane assembly (30). The central gas assembly (10) has a driving gear (11), a driven rack (12), a central gas inlet (13), a central gas pipeline (15), a central gas nozzle (16), a drive shaft (17), and several limiting guide rails (14). The central air assembly (20) has an air inlet orifice plate (21), a central air duct one (22), a central air duct two (23), and a central flame hood (24). The air inlet orifice plate (21) is fixedly installed at the front end of the central air duct one (22), the central air duct two (23) is fixedly installed at the rear end of the central air duct one (22), and the central flame hood (24) is fixedly installed at the rear end of the central air duct two (23). Several limiting guide rails (14) are fixedly installed on the outer ring of the central gas inlet (13), and the limiting guide rails (14) are equidistantly arranged on the central gas inlet (13). The air inlet orifice plate (21) has a groove at the center of its front and rear ends that is compatible with the central gas inlet (13) and the limiting guide rails (14). The central gas inlet (13) is slidably installed in the groove of the air inlet orifice plate (21) through the limiting guide rails (14). The driven rack (12) is fixedly installed at the top of the central gas inlet (13). The driving gear (11) is installed on one side of the driven rack (12). The transmission shaft (17) is fixedly installed at the center of the top of the driving gear (11). The central gas pipe (15) is fixedly installed at the rear end of the central gas inlet (13). The central gas nozzle (16) is installed at the rear end of the central gas pipe (15).

2. The adjustable center fire structure according to claim 1, characterized in that: The driving gear (11) meshes with the driven rack (12), and the center points of the air inlet orifice plate (21), the central air duct (22), the central gas inlet (13), and the central gas nozzle (16) are on the same straight line.

3. The adjustable center fire structure according to claim 2, characterized in that: The central gas pipeline (15) and the central gas inlet (13) are both hollow cylindrical, and the rear of the central flame hood (24) has several through holes.

4. The adjustable center fire structure according to claim 3, characterized in that: The swirl vane assembly (30) has a set bolt (31), a swirl vane assembly sleeve (32), and several swirl vane bodies (33). The several swirl vane bodies (33) are equidistantly distributed on the outer ring of the swirl vane assembly sleeve (32), and the swirl vane bodies (33) and the swirl vane assembly sleeve (32) are fixedly connected.

5. An adjustable center fire structure according to claim 4, characterized in that: The swirl vane assembly sleeve (32) is slidably installed on the outer ring of the central gas pipeline (15). A locking hole is provided on one side of the swirl vane assembly sleeve (32), and the locking hole is threadedly matched with the set bolt (31).

6. An adjustable center fire structure according to claim 5, characterized in that: The swirl vane body (33) is adapted to match the central gas nozzle (16), the set bolt (31) is threaded in the locking hole, and the end of the set bolt (31) abuts against the outer ring of the central gas pipeline (15), and the center point of the swirl vane assembly sleeve (32) is on the same straight line as the center point of the central gas nozzle (16).

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