Boiler gas mixing air supply device

Abstract

The embodiment of the invention provides a boiler gas mixing air supply device which comprises a bottom plate and a vertical plate fixedly arranged at the top of the bottom plate. The combustion chamber is arranged on the bottom plate; the first end of the combustion head is arranged in the combustion chamber, and the second end extends out of the combustion chamber and is fixedly connected with the mixing chamber; an air feeder, an air inlet pipe and a plurality of methane feeding pipes, the air feeder is fixedly arranged on one side of the vertical plate, and the air inlet pipe is transversely arranged and is respectively communicated with the mixing chamber and the air feeder; the plurality of methane feeding pipes are communicated with the air inlet pipe; the filtering device is arranged between the air outlet of the air feeder and the air inlet pipe and comprises a circular plate and a driving assembly, the circular plate is rotationally arranged on the air inlet pipe in a sealed mode, the circular plate is provided with an annular filtering part, and filtering holes are formed in the annular filtering part; the driving assembly is in transmission connection with the circular plate. According to the utility model, impurities in the air can be effectively filtered, the blocked annular filtering part can be rotated out, and the unblocked annular filtering part can be rotated in, so that a complete passage state is kept.

Description

Technical Field

[0001] The embodiment of the present invention relates to the technical field of industrial boilers, and specifically to a boiler gas mixing air supply device. Background Art

[0002] Some industrial boilers use methane as raw material for combustion. The fuel needs air to burn normally. Correspondingly, the fuel needs a certain amount of air to burn fully, and air is usually supplied by a blower.

[0003] However, some air supply devices now do not have a filtering function, and are prone to transporting impurities in the air. Some air supply devices with a filtering function will be blocked by impurities after long-term use, affecting the air flow rate and thus the combustion state.

[0004] In addition, the current air supply device cannot automatically adjust the methane delivery flow rate according to the air supply flow rate. The methane flow rate needs to be adjusted separately, which is complicated to operate. Therefore, we propose a boiler gas mixing air supply device to solve the above problem. Summary of the invention

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

[0006] An embodiment of the present invention provides a boiler gas mixing air supply device, the device comprising:

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

[0008] A combustion chamber, a combustion head and a mixing chamber, wherein the combustion chamber is arranged on the bottom plate; the first end of the combustion head is arranged in the combustion chamber, and the second end of the combustion head extends out of the combustion chamber and is fixedly connected to the mixing chamber through a flange;

[0009] A blower, an air inlet pipe and a plurality of methane feed pipes, wherein the blower is fixedly arranged on one side of the vertical plate, the air inlet pipe is arranged horizontally and is respectively connected to the mixing chamber and the blower; the plurality of methane feed pipes are all connected to the air inlet pipe;

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

[0011] The filtering device includes a circular plate and a driving assembly. The circular plate is rotatably and sealingly arranged on the air inlet pipe. An annular filter portion is arranged inside the circular plate, and the annular filter portion is provided with filter holes. The driving assembly is transmission-connected to the circular plate to rotate out the blocked annular filter portion and rotate the unblocked annular filter portion 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 fixing plate, the driving assembly includes a driving motor and a bevel gear transmission mechanism, and the bevel gear transmission mechanism includes a first bevel gear and a second bevel gear;

[0013] The fixing plate is fixedly arranged on the bottom plate, the first end of the cross bar is fixedly connected to the circular plate, and the second end of the cross bar is rotatably connected to the fixing plate;

[0014] The first bevel gear is fixedly disposed on the outer side of the cross 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 drivingly connected to the second end of the vertical bar.

[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 on the bottom plate with relative spacing, and the worm is rotatably connected between the two rectangular plates. The worm wheel is fixedly arranged on the second end of the vertical rod and meshes with the worm. The driving motor is arranged on one of the rectangular plates and is transmission-connected to the worm.

[0017] In some possible embodiments, the device also includes a first annular sealing plate and a second annular sealing plate; the first annular sealing plate is arranged at one end of the circular plate close to the air inlet pipe, and the second annular sealing plate is arranged at one end of the circular plate close to the air outlet of the blower.

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

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

[0020] The first end of the L-shaped plug plate is movably inserted into the methane feed pipe, and the second end of the L-shaped plug plate is connected to the telescopic mechanism, which can drive the L-shaped plug plate to extend and 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 member;

[0022] The connecting plate is fixed in the air inlet duct, a first round rod is provided at the first end of the connecting plate, the second round rod is slidably connected inside the first round rod, an end of the second round rod is fixedly connected to the second end of the L-shaped plug plate, and the elastic member is movably sleeved on the outer side of the second round rod.

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

[0024] The first end of the brush is fixedly arranged on the top of the bottom plate, the second end of the brush corresponds to the annular filter portion, and bristles are arranged on one side of the brush close to the annular filter portion.

[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 arranged on the inner walls at 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 comprises a large ball valve serially connected to the air inlet pipe and a small ball valve serially connected to the methane feed pipe;

[0028] The interior of the large ball valve includes a large valve core and a large hand wheel connected to the large valve core;

[0029] The interior of the small ball valve comprises a small valve core and a small hand wheel connected to the small valve core.

[0030] The boiler gas mixed air supply device of the embodiment of the present invention can send the air generated by the blower when it is working into the air inlet pipe through the annular filter part, and the impurities in the air can be filtered through the filtering of the annular filter part. When the filter eye on the annular filter part is blocked after long-term use, the circular plate is driven to rotate by the driving component, so that the blocked annular filter part is rotated out, and the unblocked annular filter part is rotated between the air outlet and the air inlet pipe of the blower, so as to maintain a complete passage state. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the main three-dimensional structure of the boiler gas mixing air supply device according to an embodiment of the present invention;

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

[0034] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the interior of the air inlet pipe of the boiler gas mixing air supply device according to an embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of a cross-sectional three-dimensional structure of the interior of a mixing chamber of a boiler gas mixing and air supply device according to an embodiment of the present invention;

[0036] Figure 5 for Figure 1 A schematic diagram of the enlarged three-dimensional structure of the middle A area;

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

[0038] In the figure: 1-bottom plate, 2-combustion chamber, 3-combustion head, 4-mixing chamber, 5-air inlet pipe, 6-methane feed pipe, 7-vertical plate, 8-air blower, 9-circular plate, 10-filter eye, 11-first annular sealing pad, 12-cross bar, 13-fixed 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 pad, 22-brush, 23-L-shaped plug plate, 24-connecting plate, 25-first round rod, 26-second round rod, 27-elastic member, 28-annular rotating plate, 29-arc blade, 30-large ball valve, 31-small ball valve, 32-large hand wheel, 34-large valve core. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0040] Unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. "Including" or "comprising" used in the embodiments of the present invention neither limit the shapes, numbers, steps, actions, operations, components, originals and / or their groups mentioned, nor exclude the appearance or addition of one or more other different shapes, numbers, steps, actions, operations, components, originals and / or their groups, or the addition of these. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number and order of the indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0041] Unless otherwise specifically stated, the relative arrangement of the components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship, and the techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices shown should be considered as part of the authorized specification. In all examples shown and discussed here, any specific other examples may have different values. It should be noted that similar symbols and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] In the description of the embodiments of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the embodiments of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in the embodiments of the present invention and the features of the different embodiments or examples, without contradiction.

[0043] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described here.

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

[0045] Specifically, the vertical plate 7 is fixedly arranged on the top of the bottom plate 1, the combustion chamber 2 is arranged on the bottom plate 1, the first end of the combustion head 3 is arranged in the combustion chamber 2, and the second end of the combustion head 3 extends to the outside of the combustion chamber 2 and is fixedly connected to the mixing chamber 4 through a flange. The air blower 8 is fixedly arranged on one side of the vertical plate 7, and the air inlet pipe 5 is transversely arranged and respectively connected to the mixing chamber 4 and the air blower 8. The multiple methane feed pipes 6 are all connected to the air inlet pipe 5.

[0046] like Figure 1 and Figure 2 As shown, the boiler gas mixing air supply device of the embodiment of the present invention also includes a filtering device, which is arranged between the air outlet of the blower 8 and the air inlet pipe 5; wherein, the filtering device includes a circular plate 9 and a driving assembly, the circular plate 9 is rotatably and sealingly arranged on the air inlet pipe 5, and an annular filter portion is arranged inside the circular plate 9, and the annular filter portion is provided with a filter hole 10; the driving assembly is transmission-connected to the circular plate 9 to rotate out the blocked annular filter portion and rotate the unblocked annular filter portion 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, the wind will be blown into the air inlet pipe 5 through the annular filter part. The annular filter part is provided with a filter eye 10, and its function is to effectively prevent impurities from entering the air inlet pipe 5. Impurities in the air can be successfully filtered out by filtering by the annular filter part. After a long period of use, the filter eye 10 on the annular filter part may be blocked. At this time, the drive assembly is started, and the drive assembly can drive the circular plate 9 to rotate. In this way, the blocked annular filter part can be turned out, and the unblocked annular filter part can be turned between the air outlet of the blower 8 and the air inlet pipe 5, thereby maintaining a completely unblocked state.

[0048] The boiler gas mixed air supply device of the embodiment of the present invention can send the air generated by the blower when it is working into the air inlet pipe through the annular filter part, and the impurities in the air can be filtered through the filtering of the annular filter part. When the filter eye on the annular filter part is blocked after long-term use, the circular plate is driven to rotate by the driving component, so that the blocked annular filter part is rotated out, and the unblocked annular filter part is rotated between the air outlet and the air inlet pipe of the blower, so as to maintain a complete passage state.

[0049] For example, Figure 1 and Figure 5 As shown, the device also includes a cross bar 12, a fixed plate 13 and a vertical bar 14, the driving assembly includes a driving motor 20 and a bevel gear transmission mechanism, and the bevel gear transmission mechanism includes a first bevel gear 15 and a second bevel gear 16; the fixed plate 13 is fixedly arranged on the base plate 1, the first end of the cross bar 12 is fixedly connected to the circular plate 9, and the second end of the cross bar 12 is rotatably connected to the fixed plate 13; the first bevel gear 15 is fixedly arranged on the outer side of the cross bar 12, the second bevel gear 15 is fixedly arranged at the first end of the vertical bar 14 and meshes with the first bevel gear 15, and the driving motor 20 is transmission-connected to the second end of the vertical bar 14.

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

[0051] For example, Figure 2 and Figure 5 The device further comprises a first annular sealing pad 11 and a second annular sealing pad 21; the first annular sealing pad 11 is arranged at one end of the circular plate 9 close to the air inlet pipe 5, and the second annular sealing pad 21 is arranged at one end of the circular plate 9 close to the air outlet of the blower 8. The first annular sealing pad 11 and the second annular sealing pad 21 are respectively tightly fitted with both sides of the circular plate 9. This tightly fitting design can effectively prevent air from leaking from the gap between the circular plate 9 and the air inlet pipe 5 and the air outlet of the blower 8, thereby ensuring the sealing performance of the filtering device.

[0052] In actual use, the blower 8 is started first. After the blower 8 starts working, it will blow the wind into the air inlet pipe 5 through the annular filter part. The annular filter part is provided with a filter 10, and its function is to effectively prevent impurities from entering the air inlet pipe 5. After filtering by the annular filter part, impurities in the air can be successfully filtered out. In this process, the first annular sealing pad 11 and the second annular sealing pad 21 play an important sealing role. After a long period of use, the filter 10 on the annular filter part may be blocked. At this time, start the motor 20. After the motor 20 is running, it will drive the worm 19 to rotate. The rotation of the worm 19 then drives the worm wheel 17 to rotate. The worm wheel 17 drives the vertical rod 14 to rotate. The vertical rod 14 drives the cross rod 12 to rotate through the cooperation of the first bevel gear 15 and the second bevel gear 16. The cross rod 12 then drives the circular plate 9 to rotate. In this way, the blocked annular filter portion can be turned out, and the unblocked annular filter portion can be turned between the air outlet of the blower 8 and the air inlet pipe 5, thereby maintaining a completely unobstructed state.

[0053] For example, Figure 1 and Figure 3 As shown, the device further includes a plurality of regulating components, each of which is respectively connected to the corresponding methane feed pipe 6 to regulate the methane flow rate from the methane feed pipe 6 into the air inlet pipe 5 .

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

[0055] For example, 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 member 27; the connecting plate 24 is fixed in the air inlet duct 5, the first end of the connecting plate 24 is provided with a first round rod 25, the interior of the first round rod 25 is slidably connected with the second round rod 26, the end of the second round rod 26 is fixedly connected to the second end of the L-shaped plug 23 plate, and the elastic member 27 is movably sleeved on the outer side of the second round rod 26, and the elastic member 27 can be a spring.

[0056] Specifically, when the wind blown by the blower 8 enters the air inlet pipe 5, the L-shaped plug plate 23 will be subject to greater wind resistance. This wind resistance will drive the second round rod 26 to slide into the first round rod 25. At this time, the elastic member 27 will be squeezed, and the L-shaped plug plate 23 will move to the right. In this way, a passage is formed in the methane feed pipe 6. When the air supply of the blower 8 increases, the wind resistance of the L-shaped plug plate 23 will become greater. Correspondingly, the passage in the methane feed pipe 6 will also become larger. In this way, the flow rate of methane can be automatically adjusted according to the air supply of the blower 8.

[0057] For example, Figure 2 As shown, the device further comprises a brush 22; the first end of the brush 22 is fixedly arranged on the top of the bottom plate 1, the second end of the brush 22 corresponds to the annular filter portion, and bristles are arranged on one side of the brush 22 close to the annular filter portion. During the rotation of the circular plate 9, the arrangement of the brush 22 can effectively scrub the annular filter portion.

[0058] For example, Figure 1 and Figure 4 As shown, the device further includes two annular rotating plates 28 and a plurality of arc-shaped blades 29; the two annular rotating plates 28 are rotatably arranged on the inner walls of both sides of the mixing chamber 4, and the plurality of 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 the arc-shaped blades 29 are driven to rotate under the action of wind force. This further mixes the methane and air, making the combustion more complete.

[0059] For example, Figure 1 and Figure 6 As shown, the device also includes a large ball valve 30 arranged in series on the air inlet pipe and a small ball valve 31 arranged in series on the methane feed pipe 6; the interior of the large ball valve 30 includes a large valve core 34 and a large handwheel 32 connected to the large valve core 34; the interior of 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 turning the large handwheel 32, the rotation of the large valve core 34 can be controlled, thereby adjusting the amount of air introduced into the air inlet pipe 5 by the blower 8. The small ball valve is used to control the air intake of methane gas. The small ball valve is a hemispherical valve core. The small handwheel is connected to the small valve core. By turning the small handwheel, the rotation of the small valve core can be controlled, thereby adjusting the content of methane gas introduced into the blower.

[0060] The boiler gas mixed air supply device of the embodiment of the present invention, when working: start the air blower 8, and the air blower 8 works to send the air through the annular filter part into the air inlet pipe 5. Impurities in the air can be filtered out by filtering of the annular filter part. The first annular sealing pad 11 and the second annular sealing pad 21 play a sealing role. When the filter eye 10 on the annular filter part is blocked, start the motor 20. The motor 20 drives the worm 19 to rotate, the worm 19 drives the worm gear 17 to rotate, the worm gear 17 drives the vertical rod 14 to rotate, the vertical rod 14 drives the cross rod 12 to rotate through the first bevel gear 15 and the second bevel gear 16, and the cross rod 12 drives the circular plate 9 to rotate, and the blocked annular filter part is turned out, and the unblocked annular filter part is turned between the air outlet of the air blower 8 and the air inlet pipe 5 to maintain a full passage state. During the rotation of the circular plate 9, the brush 22 can scrub the annular filter part. After the wind blown by the blower 8 enters the air inlet pipe 5, the L-shaped plug plate 23 is subject to a large wind resistance, driving the second round rod 26 to slide into the first round rod 25, the elastic member 27 is squeezed, and the L-shaped plug plate 23 moves to the right, so that the methane feed pipe 6 forms a passage. When the air supply of the blower 8 increases, the greater the wind resistance of the L-shaped plug plate 23, the larger the passage in the methane feed pipe 6, so that the flow of methane can be automatically adjusted according to the air supply of the blower 8. Methane and air enter the mixing chamber 4, and under the action of wind force, the annular rotating plate 28 and the arc blade 29 are driven to rotate, further mixing methane and air, so that the combustion is more complete. When it is necessary to control the air volume and the content of methane gas entering the blower, the large ball valve 30 can be controlled by turning the large hand wheel 32 to adjust the air intake of the blower gas; the small ball valve 31 can be controlled by turning the small hand wheel to adjust the air intake of the methane gas.

[0061] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill 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 air supply device, characterized in that: The device comprises: A bottom plate and a vertical plate, wherein the vertical plate is fixedly arranged on the top of the bottom plate; A combustion chamber, a combustion head and a mixing chamber, wherein the combustion chamber is arranged on the bottom plate; the first end of the combustion head is arranged in the combustion chamber, and the second end of the combustion head extends out of the combustion chamber and is fixedly connected to the mixing chamber through a flange; A blower, an air inlet pipe and a plurality of methane feed pipes, wherein the blower is fixedly arranged on one side of the vertical plate, the air inlet pipe is arranged horizontally and is respectively connected to the mixing chamber and the blower; the plurality of methane feed pipes are all connected to the air inlet pipe; A filter device, the filter device is arranged between the air outlet of the blower and the air inlet pipe; wherein, The filtering device includes a circular plate and a driving assembly. The circular plate is rotatably and sealingly arranged on the air inlet pipe. An annular filter portion is arranged inside the circular plate, and the annular filter portion is provided with filter holes. The driving assembly is transmission-connected to the circular plate to rotate out the blocked annular filter portion and rotate the unblocked annular filter portion between the air outlet and the air inlet pipe of the blower.

2. The boiler gas mixing air supply device according to claim 1, characterized in that: The device also includes a crossbar, a fixing plate and a vertical bar, the driving assembly includes a driving 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 arranged on the bottom plate, the first end of the cross bar is fixedly connected to the circular plate, and the second end of the cross bar is rotatably connected to the fixing plate; The first bevel gear is fixedly disposed on the outer side of the cross 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 drivingly connected to the second end of the vertical bar.

3. The boiler gas mixing 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 on the bottom plate with relative spacing, and the worm is rotatably connected between the two rectangular plates. The worm wheel is fixedly arranged on the second end of the vertical rod and meshes with the worm. The driving motor is arranged on one of the rectangular plates and is transmission-connected to the worm.

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

5. The boiler gas mixing air supply device according to any one of claims 1 to 3, characterized in that: The device also includes a plurality of regulating components, each of which is connected to a corresponding methane feed pipe to regulate the flow of methane from the methane feed pipe into the air inlet pipe.

6. The boiler gas mixing air supply device according to claim 5, characterized in that: The adjustment assembly includes an L-shaped plug plate and a telescopic mechanism; The first end of the L-shaped plug plate is movably inserted into the methane feed pipe, and the second end of the L-shaped plug plate is connected to the telescopic mechanism, which can drive the L-shaped plug plate to extend and retract according to the air intake of the air inlet pipe.

7. The boiler gas mixing air supply device according to claim 6, characterized in that: The telescopic mechanism comprises a connecting plate, a first round rod, a second round rod and an elastic member; The connecting plate is fixed in the air inlet duct, a first round rod is provided at the first end of the connecting plate, the second round rod is slidably connected inside the first round rod, an end of the second round rod is fixedly connected to the second end of the L-shaped plug plate, and the elastic member is movably sleeved on the outer side of the second round rod.

8. The boiler gas mixing 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 arranged on the top of the bottom plate, the second end of the brush corresponds to the annular filter portion, and bristles are arranged on one side of the brush close to the annular filter portion.

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

10. The boiler gas mixing air supply device according to any one of claims 1 to 3, characterized in that: The device also includes a large ball valve serially connected to the air inlet pipe and a small ball valve serially connected to the methane feed pipe; The interior of the large ball valve includes a large valve core and a large hand wheel connected to the large valve core; The interior of the small ball valve comprises a small valve core and a small hand wheel connected to the small valve core.

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