Center air valve of burner nozzle

Abstract

The utility model is suitable for the technical field of combustors, and provides a combustor nozzle center air valve which comprises a first shell installed on a combustor body, a first circular plate is fixedly installed on the inner wall of the first shell, and a plurality of first air holes used for ventilation are formed in the first circular plate; the second shell is welded on the inner wall of the top of the first shell; the rotating shaft is rotationally mounted on the first circular plate and the second shell; the second circular plate is welded to the rotating shaft, a plurality of second air holes are formed in the second circular plate, and the second air holes correspond to the first air holes respectively; and the adjusting mechanism is assembled on the first shell and is used for adjusting the air volume. The burner nozzle center air valve solves the problems that when an existing burner nozzle center air valve is used, the air volume is difficult to accurately adjust to the optimal state, the combustion efficiency is not stable, and the labor intensity of operators is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of burners, and in particular relates to a central air valve for a burner nozzle of a burner. Background Art

[0002] Burners, devices that mix and burn fuel and air in a specific manner, are widely used in various fields, including industrial, civil, and specialty applications. The central air damper of the burner nozzle plays a key role in the burner's structure. Its primary function is to regulate and control the air volume at the burner's outlet. The central air damper is crucial because it prevents excessive pulverized coal flow from clogging the burner outlet, ensuring smooth and even entry of pulverized coal into the combustion zone. Air volume adjustment must be just right; excessive or insufficient air volume can adversely affect pulverized coal mixing and combustion.

[0003] However, when the existing burner nozzle center air valve is in use, its air volume adjustment usually relies on manual operation. This manual adjustment method has obvious problems. First, since the adjustment mainly depends on the operator's experience and feeling, it is difficult to accurately adjust the air volume to the optimal state, which will lead to unstable combustion efficiency and increase the labor intensity of the operator. Utility Model Content

[0004] The utility model provides a burner nozzle center air valve, aiming to solve the problem that the existing burner nozzle center air valve is difficult to accurately adjust the air volume to the optimal state during use, resulting in unstable combustion efficiency and increased labor intensity of operators.

[0005] The utility model is implemented as follows: a burner nozzle center air valve comprises: a first shell mounted on the burner body, a first circular plate fixedly mounted on the inner wall of the first shell, a plurality of first air holes for ventilation being provided on the first circular plate; a second shell welded to the top inner wall of the first shell; a rotating shaft rotatably mounted on the first circular plate and the second shell; a second circular plate welded to the rotating shaft, a plurality of second air holes being provided on the second circular plate, the plurality of second air holes being respectively arranged corresponding to the plurality of first air holes; and an adjusting mechanism assembled on the first shell for adjusting the air volume.

[0006] Preferably, the adjustment mechanism includes: a connecting rod rotatably mounted on the first housing, a first bevel gear fixedly mounted on the bottom end of the connecting rod; a second bevel gear fixedly mounted on the rotating shaft, the second bevel gear meshing with the first bevel gear; a servo motor fixedly mounted on the top of the first housing, a screw fixedly mounted on the output shaft of the servo motor; two vertical plates rotatably mounted on the screw, the bottoms of the two vertical plates are fixedly connected to the top of the first housing; a sliding rod welded to the side of the two vertical plates close to each other; a U-shaped plate slidably mounted on the sliding rod, the U-shaped plate being threadedly connected to the screw; a rack fixedly mounted on the U-shaped plate; a gear fixedly mounted on the top end of the connecting rod, the gear meshing with the rack.

[0007] Preferably, a scale mark is provided on the sliding rod, and an indicator block is fixedly mounted on the U-shaped plate, and the indicator block is located above the sliding rod.

[0008] Preferably, a protective shell is fixedly mounted on the top of the first shell, and the protective shell is located outside the servo motor.

[0009] Preferably, an inspection port is provided at the top of the protective shell, a cover is provided on the inspection port, a plurality of mounting holes are provided on the cover, a plurality of mounting holes are provided on each of the plurality of mounting holes, and a plurality of the bolts are threadedly connected to the top of the protective shell.

[0010] Preferably, the cover body is configured to be rectangular, and a handle is fixedly mounted on the top of the cover body. The handle is configured to be arc-shaped and is used to lift the cover body.

[0011] Preferably, an observation port is provided on one side of the protective shell, and a transparent plate is fixedly mounted on the inner wall of the observation port, and the transparent plate is made of plastic.

[0012] Preferably, the indicating block is configured to be triangular, and the first bevel gear and the second bevel gear are both made of stainless steel.

[0013] Compared with the related art, the burner nozzle center air valve provided by the utility model has the following beneficial effects:

[0014] The first shell can provide an assembly space for the adjustment mechanism. When the adjustment mechanism is used, the rotating shaft can drive the second circular plate to rotate, so that the gap between the second air hole and the first air hole will change, thereby realizing the air volume adjustment of the burner body. The larger the gap, the more gas will be discharged from the burner nozzle. The adjustment is more convenient and labor-saving. Since the adjustment mechanism is electrically driven, it can better ensure the stability and consistency of the air volume adjustment compared to manual operation, reduce the influence of human factors on the combustion process, and have a better use effect. Through the cooperation of the indicator block and the scale mark, the staff can intuitively understand the current position of the U-shaped plate. By pointing the indicator block to the position on the scale mark, the air volume adjustment can be convenient and accurate, and it is not easy to make mistakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of a burner burner center air valve provided by the utility model;

[0016] Figure 2 This is a schematic diagram of the external structure of the utility model;

[0017] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part A shown in FIG;

[0018] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part B shown in FIG;

[0019] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of part C shown in ;

[0020] Figure 6 This is a schematic diagram of the three-dimensional structure of the U-shaped plate and the indicator block in the present utility model;

[0021] Figure 7 It is a side structural schematic diagram of the second circular plate in the present invention.

[0022] Figure numerals: 1. burner body; 2. first shell; 3. first circular plate; 4. second shell; 5. rotating shaft; 6. second circular plate; 7. connecting rod; 8. first bevel gear; 9. second bevel gear; 10. servo motor; 11. screw; 12. vertical plate; 13. sliding rod; 14. U-shaped plate; 15. rack; 16. gear; 17. indicator block; 18. protective shell; 19. transparent plate. DETAILED DESCRIPTION

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0024] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] The embodiment of the utility model provides a burner nozzle center air valve, such as Figure 1-7 As shown, the burner nozzle center air valve includes: a first shell 2 mounted on the burner body 1, a first circular plate 3 is fixedly mounted on the inner wall of the first shell 2, and a plurality of first air holes for ventilation are opened on the first circular plate 3; a second shell 4 welded to the top inner wall of the first shell 2; a rotating shaft 5 rotatably mounted on the first circular plate 3 and the second shell 4; a second circular plate 6 welded to the rotating shaft 5, and a plurality of second air holes are opened on the second circular plate 6, and the plurality of second air holes are respectively arranged corresponding to the plurality of first air holes; and an adjusting mechanism assembled on the first shell 2 for adjusting the air volume.

[0026] It should be noted that the air volume adjustment of the existing burner nozzle center air valve usually relies on manual operation when in use. This manual adjustment method has obvious problems. First, since the adjustment mainly relies on the operator's experience and feeling, it is difficult to accurately adjust the air volume to the optimal state, which will lead to unstable combustion efficiency and increase the operator's labor intensity.

[0027] In this embodiment, when using the central air valve of the burner nozzle, it is necessary to start the adjustment mechanism installed on the first shell 2. The adjustment mechanism will drive the second circular plate 6 to rotate by controlling the rotation of the rotating shaft 5, thereby changing the gap between the first air hole and the second air hole to achieve precise adjustment of the air volume. The larger the gap, the more gas will be discharged from the burner nozzle. Since the adjustment mechanism is electrically driven, compared with manual operation, it can better ensure the stability and consistency of the air volume adjustment, reduce the influence of human factors on the combustion process, and have a better use effect.

[0028] In a further preferred embodiment of the present utility model, the adjusting mechanism includes: a connecting rod 7 rotatably mounted on the first shell 2, and a first bevel gear 8 is fixedly mounted on the bottom end of the connecting rod 7; a second bevel gear 9 fixedly mounted on the rotating shaft 5, and the second bevel gear 9 is meshed with the first bevel gear 8; a servo motor 10 fixedly mounted on the top of the first shell 2, and a screw 11 is fixedly mounted on the output shaft of the servo motor 10; two vertical plates 12 rotatably mounted on the screw 11, and the bottoms of the two vertical plates 12 are fixedly connected to the top of the first shell 2; a sliding rod 13 welded to the side of the two vertical plates 12 close to each other; a U-shaped plate 14 slidably mounted on the sliding rod 13, and the U-shaped plate 14 is threadedly connected to the screw 11; a rack 15 fixedly mounted on the U-shaped plate 14; a gear 16 fixedly mounted on the top of the connecting rod 7, and the gear 16 is meshed with the rack 15.

[0029] In this embodiment, the adjustment mechanism is used to adjust the air volume. When in use, the servo motor 10 is started, and the servo motor 10 will drive the screw 11 to rotate, and the screw 11 will drive the U-shaped plate 14 to slide on the slide rod 13, and the U-shaped plate 14 will drive the rack 15 to move horizontally, and the rack 15 will drive the gear 16 to rotate, and the gear 16 will drive the connecting rod 7 to rotate, and the connecting rod 7 will drive the first bevel gear 8 to rotate, and the first bevel gear 8 will drive the rotating shaft 5 to rotate through the second bevel gear 9, so that the rotating shaft 5 drives the second circular plate 6 to rotate, thereby changing the gap between the first air hole and the second air hole, and realizing precise adjustment of the air volume. The larger the gap, the more gas will be discharged from the burner nozzle, and the adjustment is more convenient and labor-saving.

[0030] In a further preferred embodiment of the present invention, a scale mark is provided on the slide bar 13 , and an indicator block 17 is fixedly mounted on the U-shaped plate 14 , and the indicator block 17 is located above the slide bar 13 .

[0031] In this embodiment, through the cooperation of the indicator block 17 and the scale mark, the staff can intuitively understand the current position of the U-shaped plate 14. By pointing the indicator block 17 to the position on the scale mark, the adjustment of the air volume can be convenient and accurate, and errors are not likely to occur.

[0032] In a further preferred embodiment of the present invention, a protective shell 18 is fixedly mounted on the top of the first housing 2 , and the protective shell 18 is located outside the servo motor 10 .

[0033] In this embodiment, the protective shell 18 can effectively prevent external impurities such as dust and moisture from entering the interior of the servo motor 10 , thereby avoiding malfunction or damage of the servo motor 10 due to contamination.

[0034] In a further preferred embodiment of the present invention, an inspection port is provided on the top of the protective shell 18, a cover is provided on the inspection port, a plurality of mounting holes are provided on the cover, and bolts are provided on the plurality of mounting holes, and the plurality of bolts are threadedly connected to the top of the protective shell 18.

[0035] In this embodiment, the cover can be fixed to the protective shell 18 by multiple bolts. When the servo motor 10 or other components inside the protective shell 18 need to be inspected, it is only necessary to loosen the bolts, remove the cover, and operate through the inspection port, which is relatively simple.

[0036] In a further preferred embodiment of the present invention, the cover body is configured to be rectangular, and a handle is fixedly installed on the top of the cover body. The handle is configured to be arc-shaped and is used to lift the cover body.

[0037] In this embodiment, the curved handle allows the staff to easily grasp and lift the cover, making it convenient to open and close the cover.

[0038] In a further preferred embodiment of the present invention, an observation port is provided on one side of the protective shell 18 , and a transparent plate 19 is fixedly mounted on the inner wall of the observation port, and the transparent plate 19 is made of plastic.

[0039] In this embodiment, through the transparent plate 19 , the staff can visually see the operating status of the U-shaped plate 14 or other internal components, and can perform preliminary inspection and judgment without opening the protective shell 18 .

[0040] In a further preferred embodiment of the present invention, the indicator block 17 is configured to be triangular, and the first bevel gear 8 and the second bevel gear 9 are both made of stainless steel.

[0041] In this embodiment, the triangular-shaped indicator block 17 enables the staff to locate the position on the scale mark more quickly and accurately, thereby improving the accuracy and efficiency of the adjustment. Whether in a horizontal position or an inclined position, the triangular indicator block 17 can provide clear visual feedback. The first bevel gear 8 and the second bevel gear 9 made of stainless steel have excellent corrosion resistance and strength, and can maintain stable performance in various harsh environments. This material selection ensures wear resistance and reliability during long-term operation and reduces the frequency of maintenance and replacement.

[0042] To sum up, compared with the relevant technology, the present solution can provide an assembly space for the adjustment mechanism through the first shell 2. When the adjustment mechanism is used, the rotating shaft 5 can drive the second circular plate 6 to rotate, so that the gap between the second air hole and the first air hole will change, thereby realizing the air volume adjustment of the burner body 1. The larger the gap, the more gas will be discharged from the burner nozzle. The adjustment is more convenient and labor-saving. Since the adjustment mechanism is electrically driven, it can better ensure the stability and consistency of the air volume adjustment compared to manual operation, reduce the influence of human factors on the combustion process, and have a better use effect. Through the cooperation of the indicator block 17 and the scale mark, the staff can intuitively understand the current position of the U-shaped plate 14. By pointing the indicator block 17 to the position on the scale mark, the air volume adjustment can be convenient and accurate, and it is not easy to make mistakes.

[0043] It is worth noting that the circuits, electronic components and modules involved in the present invention are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0044] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope to be protected by the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making any creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope to be protected by the present invention.

Claims

1. A burner nozzle center air valve, characterized in that: include: A first shell (2) is mounted on the burner body (1), a first circular plate (3) is fixedly mounted on the inner wall of the first shell (2), and a plurality of first air holes for ventilation are provided on the first circular plate (3); a second shell (4) welded to the top inner wall of the first shell (2); a rotating shaft (5) rotatably mounted on the first circular plate (3) and the second shell (4); a second circular plate (6) welded to the rotating shaft (5), wherein the second circular plate (6) is provided with a plurality of second air holes, and the plurality of second air holes are respectively arranged corresponding to the plurality of first air holes; An adjusting mechanism is mounted on the first shell (2) for adjusting the air volume.

2. The burner nozzle center air valve according to claim 1, characterized in that: The regulating mechanism comprises: A connecting rod (7) is rotatably mounted on the first housing (2), wherein a first bevel gear (8) is fixedly mounted on the bottom end of the connecting rod (7); a second bevel gear (9) fixedly mounted on the rotating shaft (5), the second bevel gear (9) being meshed with the first bevel gear (8); A servo motor (10) is fixedly mounted on the top of the first housing (2), and a screw (11) is fixedly mounted on the output shaft of the servo motor (10); Rotating two vertical plates (12) mounted on the screw rod (11), the bottoms of the two vertical plates (12) are fixedly connected to the top of the first shell (2); A sliding rod (13) welded to one side of the two vertical plates (12) close to each other; A U-shaped plate (14) is slidably mounted on the slide rod (13), wherein the U-shaped plate (14) is threadedly connected to the screw rod (11); a rack (15) fixedly mounted on the U-shaped plate (14); A gear (16) is fixedly mounted on the top end of the connecting rod (7), and the gear (16) is meshed with the rack (15).

3. The burner nozzle center air valve according to claim 2, characterized in that: The slide bar (13) is provided with a scale mark, and an indicator block (17) is fixedly mounted on the U-shaped plate (14), and the indicator block (17) is located above the slide bar (13).

4. The burner nozzle center air valve according to claim 2, characterized in that: A protective shell (18) is fixedly mounted on the top of the first housing (2), and the protective shell (18) is located outside the servo motor (10).

5. The burner nozzle center air valve according to claim 4, characterized in that: The top of the protective shell (18) is provided with an inspection port, the inspection port is provided with a cover body, the cover body is provided with a plurality of mounting holes, the plurality of mounting holes are provided with bolts, and the plurality of bolts are threadedly connected to the top of the protective shell (18).

6. The burner nozzle center air valve according to claim 5, characterized in that: The cover body is configured to be rectangular, and a handle is fixedly mounted on the top of the cover body. The handle is configured to be arc-shaped and is used to lift the cover body.

7. The burner nozzle center air valve according to claim 1, characterized in that: An observation port is provided on one side of the protective shell (18), and a transparent plate (19) is fixedly mounted on the inner wall of the observation port. The transparent plate (19) is made of plastic.

8. The burner nozzle center air valve according to claim 3, characterized in that: The indicating block (17) is configured to be triangular, and the first bevel gear (8) and the second bevel gear (9) are both made of stainless steel.

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