A boiler gas mixing and air supply device

Abstract

This invention provides a boiler gas mixing and air supply device, comprising: a base plate and a vertical plate, fixedly mounted on the top of the base plate; a combustion chamber, a burner head, and a mixing chamber, the combustion chamber being mounted on the base plate; a first end of the burner head being located inside the combustion chamber, and a second end extending outside the combustion chamber and fixedly connected to the mixing chamber; a blower, an air inlet pipe, and multiple methane feed pipes, the blower being fixedly mounted on one side of the vertical plate, the air inlet pipes being arranged laterally and respectively connected to the mixing chamber and the blower; multiple methane feed pipes being connected to the air inlet pipe; and a filter device, located between the outlet of the blower and the air inlet pipe, comprising a circular plate and a drive assembly, the circular plate being rotatably and sealed to the air inlet pipe, the circular plate having an annular filter section with filter holes; and the drive assembly being drively connected to the circular plate. This device effectively filters impurities in the air and can rotate out blocked annular filter sections and inward unblocked annular filter sections, thereby maintaining a completely unobstructed flow path.

Description

Technical Field

[0001] This invention relates to the field of industrial boiler technology, specifically to a boiler gas mixing and air supply device. Background Technology

[0002] Some industrial boilers use methane as a fuel for combustion. The fuel needs air to burn properly, and a certain amount of air is required for it to burn completely. This air is usually supplied by a blower.

[0003] However, some air supply devices do not have a filtration function, which can easily allow impurities in the air to enter. Even in air supply devices with a filtration function, the filter screen will become clogged with impurities after long-term use, affecting the airflow and thus the combustion state.

[0004] Furthermore, current air supply devices cannot automatically adjust the methane delivery flow rate according to the air supply flow rate, requiring separate adjustment of the methane flow rate, which is complex to operate. Therefore, we propose a boiler gas mixing air supply device to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art and provides a boiler gas mixing and air supply device.

[0006] This invention provides a boiler gas mixing and air supply device, the device comprising:

[0007] A base plate and a vertical plate, wherein the vertical plate is fixedly mounted on the top of the base plate;

[0008] The combustion chamber, the burner head, and the mixing chamber are provided. The combustion chamber is disposed on the base plate. The first end of the burner head is disposed in the combustion chamber, and the second end of the burner head extends out of the combustion chamber and is fixedly connected to the mixing chamber by a flange.

[0009] The system includes a blower, an air inlet pipe, and multiple methane feed pipes. The blower is fixedly installed on one side of the vertical plate. The air inlet pipes are arranged horizontally and are connected to the mixing chamber and the blower, respectively. All of the multiple methane feed pipes are connected to the air inlet pipe.

[0010] A filter device is disposed between the air outlet of the blower and the air inlet pipe; wherein,

[0011] The filtration device includes a circular plate and a drive assembly. The circular plate is rotatably and sealed in the air inlet pipe. An annular filter section is provided inside the circular plate, and the annular filter section has filter holes. The drive assembly is drivenly connected to the circular plate to rotate out the blocked annular filter section and rotate the unblocked annular filter section into the space between the air outlet and the air inlet pipe of the blower.

[0012] In some possible embodiments, the device further includes a crossbar, a vertical bar, and a fixed plate, and the drive assembly includes a drive motor and a bevel gear transmission mechanism, wherein the bevel gear transmission mechanism includes a first bevel gear and a second bevel gear;

[0013] The fixing plate is fixedly mounted on the base plate, the first end of the crossbar is fixedly connected to the circular plate, and the second end of the crossbar is rotatably connected to the fixing plate;

[0014] The first bevel gear is fixedly disposed on the outside of the horizontal bar, the second bevel gear is fixedly disposed on the first end of the vertical bar and meshes with the first bevel gear, and the drive motor is connected to the second end of the vertical bar for transmission.

[0015] In some possible embodiments, the drive assembly further includes a worm gear transmission mechanism, and the device further includes two rectangular plates;

[0016] The two rectangular plates are arranged at intervals relative to each other on the base plate, and the worm gear is rotatably connected between the two rectangular plates. The worm wheel is fixedly arranged at the second end of the vertical rod and meshes with the worm gear. The drive motor is arranged on one of the rectangular plates and is connected to the worm gear for transmission.

[0017] In some possible embodiments, the device further includes a first annular sealing gasket and a second annular sealing gasket; the first annular sealing gasket is disposed at one end of the circular plate near the air inlet pipe, and the second annular sealing gasket is disposed at one end of the circular plate near the air outlet of the blower.

[0018] In some possible embodiments, the device further includes a plurality of regulating components, each of which is connected to a corresponding methane feed pipe to regulate the flow rate of methane entering the air inlet pipe through the methane feed pipe.

[0019] In some possible embodiments, the adjustment assembly includes an L-shaped insert and a telescopic mechanism;

[0020] The first end of the L-shaped insert is movably inserted into the methane feed pipe, and the second end of the L-shaped insert is connected to the telescopic mechanism, which can drive the L-shaped insert to extend or retract according to the air intake of the air inlet pipe.

[0021] In some possible embodiments, the telescopic mechanism includes a connecting plate, a first round rod, a second round rod, and an elastic element;

[0022] The connecting plate is fixed inside the air inlet pipe. A first round rod is provided at the first end of the connecting plate. A second round rod is slidably connected inside the first round rod. The end of the second round rod is fixedly connected to the second end of the L-shaped insert plate. The elastic element is movably sleeved on the outside of the second round rod.

[0023] In some possible embodiments, the device further includes a brush;

[0024] The first end of the brush is fixedly disposed on the top of the base plate, the second end of the brush corresponds to the annular filter part, and the brush has bristles on the side of the brush near the annular filter part.

[0025] In some possible embodiments, the device further includes two annular rotating plates and a plurality of arc-shaped blades;

[0026] The two annular rotating plates are rotatably disposed on the inner walls of both sides of the mixing chamber, and the plurality of arc-shaped blades are fixedly connected between the two annular rotating plates.

[0027] In some possible embodiments, the device further includes a large ball valve connected in series with the air inlet pipe and a small ball valve connected in series with the methane feed pipe;

[0028] The large ball valve includes a large valve core and a large handwheel connected to the large valve core.

[0029] The small ball valve includes a small valve core and a small handwheel connected to the small valve core.

[0030] The boiler gas mixing and air supply device of this invention can send the air generated by the blower during operation through an annular filter section into the air inlet pipe. The annular filter section can filter impurities in the air. When the filter holes on the annular filter section become clogged after long-term use, the drive assembly drives the circular plate to rotate, thereby turning out the clogged annular filter section and turning the unclogged annular filter section between the blower outlet and the air inlet pipe, thus maintaining a completely unobstructed passage. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a front-view perspective view of the boiler gas mixing and air supply device according to an embodiment of the present invention;

[0033] Figure 2 This is a three-dimensional structural diagram of the circular plate of the boiler gas mixing and air supply device according to an embodiment of the present invention;

[0034] Figure 3 This is a three-dimensional cross-sectional view of the air inlet pipe of the boiler gas mixing and air supply device according to an embodiment of the present invention.

[0035] Figure 4 This is a three-dimensional cross-sectional view of the mixing chamber of the boiler gas mixing and air supply device according to an embodiment of the present invention.

[0036] Figure 5 for Figure 1 Enlarged 3D structural diagram of area A in the middle;

[0037] Figure 6 This is a schematic diagram of the large ball valve structure of the boiler gas mixing and air supply device according to an embodiment of the present invention;

[0038] In the diagram: 1-Base plate, 2-Combustion chamber, 3-Burn head, 4-Mixing chamber, 5-Air inlet pipe, 6-Methane feed pipe, 7-Vertical plate, 8-Blower, 9-Circular plate, 10-Filter eye, 11-First annular sealing gasket, 12-Horizontal bar, 13-Fixing plate, 14-Vertical bar, 15-First bevel gear, 16-Second bevel gear, 17-Worm gear, 18-Rectangular plate, 19-Worm, 20-Motor, 21-Second annular sealing gasket, 22-Brush, 23-L-shaped insert plate, 24-Connecting plate, 25-First round rod, 26-Second round rod, 27-Elastic element, 28-Annular rotating plate, 29-Arc-shaped blade, 30-Large ball valve, 31-Small ball valve, 32-Large handwheel, 34-Large valve core. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] Unless otherwise specifically stated, the technical or scientific terms used in the embodiments of this invention should be understood in their ordinary sense by those skilled in the art to which this invention pertains. The terms "comprising" or "including," as used in the embodiments of this invention, do not limit the shapes, numbers, steps, actions, operations, components, elements, and / or groups thereof mentioned, nor do they exclude the appearance or addition of one or more other different shapes, numbers, steps, actions, operations, components, elements, and / or groups thereof, or the addition of these. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number and order of the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale, and techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail; however, where appropriate, the illustrated techniques, methods, and apparatus should be considered part of the specification. In all the examples shown and discussed herein, any other specific example may have different values. It should be noted that similar symbols and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] In the description of the embodiments of the present invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In the embodiments of the present invention, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in the embodiments of the present invention, as well as the features of different embodiments or examples.

[0043] Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0044] like Figures 1 to 6 As shown, the present invention relates to a boiler gas mixing and air supply device, the device comprising: a base plate 1, a combustion chamber 2, a combustion head 3, a mixing chamber 4, an air inlet pipe 5, multiple methane feed pipes 6, a vertical plate 7, and a blower 8.

[0045] Specifically, the vertical plate 7 is fixedly mounted on the top of the base plate 1, the combustion chamber 2 is mounted on the base plate 1, the first end of the burner head 3 is located inside the combustion chamber 2, and the second end of the burner head 3 extends outside the combustion chamber 2 and is fixedly connected to the mixing chamber 4 via a flange. The blower 8 is fixedly mounted on one side of the vertical plate 7, and the air inlet pipe 5 is horizontally arranged and connected to both the mixing chamber 4 and the blower 8. All of the plurality of methane feed pipes 6 are connected to the air inlet pipe 5.

[0046] like Figure 1 and Figure 2 As shown, the boiler gas mixing and air supply device of this embodiment further includes a filter device, which is disposed between the air outlet of the blower 8 and the air inlet pipe 5. The filter device includes a circular plate 9 and a drive assembly. The circular plate 9 is rotatably and sealed to the air inlet pipe 5. The circular plate 9 has an annular filter section inside, and the annular filter section has filter holes 10. The drive assembly is drivenly connected to the circular plate 9 to rotate out the blocked annular filter section and rotate the unblocked annular filter section into the space between the air outlet of the blower 8 and the air inlet pipe 5.

[0047] In actual use, the blower 8 is started first. After the blower 8 starts working, it blows air through the annular filter into the air inlet duct 5. The annular filter is equipped with filter holes 10, which effectively prevent impurities from entering the air inlet duct 5. After filtration by the annular filter, impurities in the air can be successfully filtered out. After prolonged use, the filter holes 10 on the annular filter may become clogged. At this time, the drive assembly is started, which drives the circular plate 9 to rotate. In this way, the clogged annular filter is rotated out, while the unclogged annular filter is rotated between the air outlet of the blower 8 and the air inlet duct 5, thus maintaining a completely unobstructed state.

[0048] The boiler gas mixing and air supply device of this invention can send the air generated by the blower during operation through an annular filter section into the air inlet pipe. The annular filter section can filter impurities in the air. When the filter holes on the annular filter section become clogged after long-term use, the drive assembly drives the circular plate to rotate, thereby turning out the clogged annular filter section and turning the unclogged annular filter section between the blower outlet and the air inlet pipe, thus maintaining a completely unobstructed passage.

[0049] For example, such as Figure 1 and Figure 5 As shown, the device also includes a crossbar 12, a fixing plate 13, and a vertical bar 14. The drive assembly includes a drive motor 20 and a bevel gear transmission mechanism, which includes a first bevel gear 15 and a second bevel gear 16. The fixing plate 13 is fixedly mounted on the base plate 1. The first end of the crossbar 12 is fixedly connected to the circular plate 9, and the second end of the crossbar 12 is rotatably connected to the fixing plate 13. The first bevel gear 15 is fixedly mounted on the outside of the crossbar 12, and the second bevel gear 15 is fixedly mounted on the first end of the vertical bar 14 and meshes with the first bevel gear 15. The drive motor 20 is drively connected to the second end of the vertical bar 14.

[0050] For example, such as Figure 1 and Figure 5 As shown, the drive assembly also includes a worm gear transmission mechanism. The device also includes two rectangular plates 18, which are arranged at intervals on the base plate 1. The worm gear 19 is rotatably connected between the two rectangular plates 18. The worm wheel 17 is fixedly disposed at the second end of the vertical rod 14 and meshes with the worm gear 19. The drive motor 20 is disposed on one of the rectangular plates 18 and is connected to the worm gear 19 for transmission.

[0051] For example, such as Figure 2 and Figure 5 The device further includes a first annular sealing gasket 11 and a second annular sealing gasket 21; the first annular sealing gasket 11 is disposed at one end of the circular plate 9 near the air inlet pipe 5, and the second annular sealing gasket 21 is disposed at one end of the circular plate 9 near the air outlet of the blower 8. The first annular sealing gasket 11 and the second annular sealing gasket 21 are respectively tightly fitted to both sides of the circular plate 9. This tight fit design can effectively prevent air leakage from the gaps between the circular plate 9 and the air inlet pipe 5 and the air outlet of the blower 8, ensuring the sealing performance of the filtration device.

[0052] In actual use, the blower 8 is started first. After the blower 8 starts working, it blows air through the annular filter into the air inlet pipe 5. The annular filter is equipped with filter holes 10, which effectively prevent impurities from entering the air inlet pipe 5. After filtration by the annular filter, impurities in the air can be successfully filtered out. In this process, the first annular sealing gasket 11 and the second annular sealing gasket 21 play an important sealing role. After long-term use, the filter holes 10 on the annular filter may become clogged. At this time, the motor 20 is started. After the motor 20 starts running, it drives the worm gear 19 to rotate. The rotation of the worm gear 19 then drives the worm wheel 17 to rotate. The worm wheel 17 drives the vertical rod 14 to rotate. The vertical rod 14, through the engagement of the first bevel gear 15 and the second bevel gear 16, drives the horizontal rod 12 to rotate. The horizontal rod 12 then drives the circular plate 9 to rotate. In this way, the blocked annular filter section can be turned out, while the unblocked annular filter section can be turned into the space between the air outlet of the blower 8 and the air inlet pipe 5, thus maintaining a completely unobstructed state.

[0053] For example, such as Figure 1 and Figure 3 As shown, the device also includes multiple adjustment components, each of which is connected to the corresponding methane feed pipe 6 to adjust the methane flow rate from the methane feed pipe 6 into the air inlet pipe 5.

[0054] Specifically, such as Figure 1 and Figure 3 As shown, the adjustment assembly includes an L-shaped insert plate 23 and a telescopic mechanism; the first end of the L-shaped insert plate 23 is movably inserted into the methane feed pipe 6, and the second end of the L-shaped insert plate 23 is connected to the telescopic mechanism, which can drive the L-shaped insert plate 23 to extend or retract according to the air intake volume of the air intake pipe 5.

[0055] For example, such as Figure 1 and Figure 3 As shown, the telescopic mechanism includes a connecting plate 24, a first round rod 25, a second round rod 26, and an elastic element 27. The connecting plate 24 is fixed inside the air inlet pipe 5. The first end of the connecting plate 24 is provided with the first round rod 25. The second round rod 26 is slidably connected inside the first round rod 25. The end of the second round rod 26 is fixedly connected to the second end of the L-shaped insert plate 23. The elastic element 27 is movably sleeved on the outside of the second round rod 26. The elastic element 27 can be a spring.

[0056] Specifically, when the air blown by the blower 8 enters the inlet pipe 5, the L-shaped insert 23 experiences significant air resistance. This air resistance causes the second rod 26 to slide into the first rod 25. At this time, the elastic element 27 is compressed, and the L-shaped insert 23 moves to the right. This creates a passage in the methane feed pipe 6. When the air volume of the blower 8 increases, the air resistance experienced by the L-shaped insert 23 becomes even greater. Correspondingly, the passage in the methane feed pipe 6 becomes larger. In this way, the methane flow rate can be automatically adjusted according to the air volume of the blower 8.

[0057] For example, such as Figure 2 As shown, the device also includes a brush 22; the first end of the brush 22 is fixedly disposed on the top of the base plate 1, the second end of the brush 22 corresponds to the annular filter section, and the brush 22 has bristles on the side near the annular filter section. During the rotation of the circular plate 9, the brush 22 can effectively clean the annular filter section.

[0058] For example, such as Figure 1 and Figure 4 As shown, the device also includes two annular rotating plates 28 and multiple arc-shaped blades 29; the two annular rotating plates 28 are rotatably disposed on the inner walls of both sides of the mixing chamber 4, and the multiple arc-shaped blades 29 are fixedly connected between the two annular rotating plates 28. After methane and air enter the mixing chamber 4 together, the annular rotating plates 28 and arc-shaped blades 29 will rotate under the action of wind. This further mixes the methane and air, making combustion more complete.

[0059] For example, such as Figure 1 and Figure 6 As shown, the device further includes a large ball valve 30 connected in series in the air inlet pipe and a small ball valve 31 connected in series in the methane feed pipe 6. The large ball valve 30 includes a large valve core 34 and a large handwheel 32 connected to the large valve core 34. The small ball valve 31 includes a small valve core (not shown in the figure) and a small handwheel (not shown in the figure) connected to the small valve core. By rotating the large handwheel 32, the rotation of the large valve core 34 can be controlled, thereby adjusting the airflow from the blower 8 into the air inlet pipe 5. The small ball valve is used to control the intake airflow of methane gas. The small ball valve has a hemispherical valve core. The small handwheel is connected to the small valve core. By rotating the small handwheel, the rotation of the small valve core can be controlled, thereby adjusting the amount of methane gas entering the blower.

[0060] In this embodiment of the boiler gas mixing and air supply device, during operation: the blower 8 is started, and the blower 8 delivers air through the annular filter section into the air inlet pipe 5. The annular filter section removes impurities from the air. The first annular sealing gasket 11 and the second annular sealing gasket 21 provide a sealing function. When the filter holes 10 on the annular filter section become clogged, the motor 20 is started. The motor 20 drives the worm gear 19 to rotate, the worm gear 19 drives the worm wheel 17 to rotate, the worm wheel 17 drives the vertical rod 14 to rotate, the vertical rod 14 drives the horizontal rod 12 to rotate via the first bevel gear 15 and the second bevel gear 16, and the horizontal rod 12 drives the circular plate 9 to rotate, thus removing the clogged annular filter section and allowing the unclogged annular filter section to pass between the outlet of the blower 8 and the air inlet pipe 5, maintaining a completely unobstructed passage. During the rotation of the circular plate 9, the brush 22 can clean the annular filter section. After the air blown by the blower 8 enters the air inlet pipe 5, the L-shaped insert 23 experiences significant wind resistance, causing the second round rod 26 to slide into the first round rod 25. The elastic element 27 is compressed, and the L-shaped insert 23 moves to the right, creating a passage in the methane feed pipe 6. When the air volume of the blower 8 increases, the wind resistance on the L-shaped insert 23 increases, and the passage in the methane feed pipe 6 becomes larger, thus automatically adjusting the methane flow rate according to the air volume of the blower 8. Methane and air enter the mixing chamber 4, where the annular rotating plate 28 and the arc-shaped blades 29 rotate under the action of the wind, further mixing the methane and air for more complete combustion. When it is necessary to control the air volume and the amount of methane gas entering the blower, the large ball valve 30 can be controlled by turning the large handwheel 32 to adjust the air volume entering the blower; the small ball valve 31 can be controlled by turning the small handwheel to adjust the air volume entering the methane gas.

[0061] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A boiler gas mixing and air supply device, characterized in that, The device includes: A base plate and a vertical plate, wherein the vertical plate is fixedly mounted on the top of the base plate; The combustion chamber, the burner head, and the mixing chamber are provided. The combustion chamber is disposed on the base plate. The first end of the burner head is disposed in the combustion chamber, and the second end of the burner head extends out of the combustion chamber and is fixedly connected to the mixing chamber by a flange. The system includes a blower, an air inlet pipe, and multiple methane feed pipes. The blower is fixedly installed on one side of the vertical plate. The air inlet pipes are arranged horizontally and are connected to the mixing chamber and the blower, respectively. All of the multiple methane feed pipes are connected to the air inlet pipe. A filter device is disposed between the air outlet of the blower and the air inlet pipe; wherein, The filtration device includes a circular plate and a drive assembly. The circular plate is rotatably and sealed in the air inlet pipe. An annular filter section is provided inside the circular plate, and the annular filter section has filter holes. The drive assembly is drivenly connected to the circular plate to rotate out the blocked annular filter section and rotate the unblocked annular filter section into the space between the air outlet and the air inlet pipe of the blower. The device also includes multiple adjustment components, each of which is connected to a corresponding methane feed pipe to adjust the methane flow rate from the methane feed pipe into the air inlet pipe; The adjustment assembly includes an L-shaped insert and a telescopic mechanism; The first end of the L-shaped insert is movably inserted into the methane feed pipe, and the second end of the L-shaped insert is connected to the telescopic mechanism, which can drive the L-shaped insert to extend or retract according to the air intake of the air inlet pipe. The telescopic mechanism includes a connecting plate, a first round rod, a second round rod, and an elastic element; The connecting plate is fixed inside the air inlet pipe. A first round rod is provided at the first end of the connecting plate. A second round rod is slidably connected inside the first round rod. The end of the second round rod is fixedly connected to the second end of the L-shaped insert plate. The elastic element is movably sleeved on the outside of the second round rod. When the air blown out by the blower enters the air inlet pipe, the L-shaped insert plate will be subject to wind resistance. This wind resistance will drive the second round rod to slide into the first round rod, thereby changing the passage size in the methane feed pipe.

2. The boiler gas mixing and air supply device according to claim 1, characterized in that, The device also includes a crossbar, a fixed plate, and a vertical bar. The drive assembly includes a drive motor and a bevel gear transmission mechanism, and the bevel gear transmission mechanism includes a first bevel gear and a second bevel gear. The fixing plate is fixedly mounted on the base plate, the first end of the crossbar is fixedly connected to the circular plate, and the second end of the crossbar is rotatably connected to the fixing plate; The first bevel gear is fixedly disposed on the outside of the horizontal bar, the second bevel gear is fixedly disposed on the first end of the vertical bar and meshes with the first bevel gear, and the drive motor is connected to the second end of the vertical bar for transmission.

3. The boiler gas mixing and air supply device according to claim 2, characterized in that, The drive assembly also includes a worm gear transmission mechanism, and the device also includes two rectangular plates; The two rectangular plates are arranged at intervals relative to each other on the base plate, and the worm gear is rotatably connected between the two rectangular plates. The worm wheel is fixedly arranged at the second end of the vertical rod and meshes with the worm gear. The drive motor is arranged on one of the rectangular plates and is connected to the worm gear for transmission.

4. The boiler gas mixing and air supply device according to any one of claims 1 to 3, characterized in that, The device further includes a first annular sealing gasket and a second annular sealing gasket; the first annular sealing gasket is disposed at one end of the circular plate near the air inlet pipe, and the second annular sealing gasket is disposed at one end of the circular plate near the air outlet of the blower.

5. The boiler gas mixing and air supply device according to any one of claims 1 to 3, characterized in that, The device also includes a brush; The first end of the brush is fixedly disposed on the top of the base plate, the second end of the brush corresponds to the annular filter part, and the brush has bristles on the side of the brush near the annular filter part.

6. The boiler gas mixing and air supply device according to any one of claims 1 to 3, characterized in that, The device also includes two annular rotating plates and multiple arc-shaped blades; The two annular rotating plates are rotatably disposed on the inner walls of both sides of the mixing chamber, and the plurality of arc-shaped blades are fixedly connected between the two annular rotating plates.

7. The boiler gas mixing and air supply device according to any one of claims 1 to 3, characterized in that, The device also includes a large ball valve connected in series in the air inlet pipe and a small ball valve connected in series in the methane feed pipe; The large ball valve includes a large valve core and a large handwheel connected to the large valve core. The small ball valve includes a small valve core and a small handwheel connected to the small valve core.

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