Air duct baffle structure of heating furnace device

Abstract

The utility model discloses an air duct baffle structure of a heating furnace device, which belongs to the technical field of heating control system structures, a heating furnace system comprises an exhaust inlet and a heating furnace, the heating furnace is further communicated with a chimney, and at least two baffle assemblies are arranged between the heating furnace and the exhaust inlet and between the heating furnace and the chimney. The baffle assembly comprises a rotating shaft and a bearing arranged on the air duct, the two ends of the rotating shaft are arranged in the bearing, and a baffle is arranged on the rotating shaft. According to the scheme, the baffle assemblies are arranged in the air duct and used for adjusting the opening degree of the air duct so that the air inlet amount can be adjusted, when the rotating shaft rotates, the baffles can rotate along with the rotating shaft, the opening degree between the baffles and the air duct can be increased or decreased, the number of the baffle assemblies is at least two, and the opening degree between the baffles and the air duct can be increased; therefore, under the condition that the rotating angle of the rotating shaft is not changed, the opening degree of the air duct can be increased, and the air supply effect can be responded more quickly.

Description

Technical Field

[0001] The utility model relates to a structure of a heating furnace device, and more specifically, to a duct damper structure of a heating furnace device. Background Art

[0002] When using a heating furnace for combustion, it is generally necessary to detect and analyze the oxygen content and carbon monoxide content inside the heating furnace, and adjust the air supply volume to achieve stable combustion in the furnace and improve the heating efficiency of the heating furnace. The air supply volume is usually adjusted by the opening degree of a damper structure. In the existing ducts of heating furnace devices, in order to facilitate control, usually only one set of damper structures is set to achieve air supply adjustment. Such a method often results in a slow air supply response speed, or a large air pressure needs to be provided to achieve rapid adjustment, with low adjustment efficiency and high energy consumption.

[0003] For example: Chinese Patent Publication No. CN117490078A, Publication Date: February 2, 2024, Invention Title: A Heating Furnace Flue Gas Circulation Oxygen Supply Combustion System and Its Automatic Control Method. This application discloses a control method for heating furnace flue gas circulation, which realizes stable negative pressure in the furnace or increases the combustion-supporting gas to assist combustion through side-draft dampers or air doors. However, in this method, the dampers and air doors do not have the characteristics of rapid response, which will lead to a slow response of the control system and a slowdown in the heating control efficiency. Summary of the Utility Model

[0004] The utility model overcomes the problem of slow air supply response of the damper in the existing heating furnace device, and provides a duct damper structure of a heating furnace device. This solution can realize rapid change in the opening degree between the wind deflector and the duct, and improve the response speed of air supply or air stop.

[0005] To solve the above technical problems, the utility model adopts the following technical solution: A duct damper structure of a heating furnace device, the heating furnace device includes an air inlet and a heating furnace, and the heating furnace is also connected to a chimney. A duct damper is provided between the heating furnace and the air inlet and between the heating furnace and the chimney. The duct damper includes at least two damper components. Each damper component includes a rotating shaft and bearings provided on the duct. Both ends of the rotating shaft are arranged in the bearings, and a damper is provided on the rotating shaft. In this solution, in the heating furnace device, it is necessary to adjust the oxygen content and carbon monoxide content by supplying air. Damper components are arranged in the duct to adjust the opening degree of the duct, thereby adjusting the air intake volume (for adjusting the oxygen content). Specifically, when the rotating shaft rotates, the damper will rotate along with the rotating shaft, and the opening degree between the damper and the duct will increase or decrease. If at least two groups of damper components are provided, the opening between the damper and the duct will increase. Thus, when the rotation angle of the rotating shaft remains unchanged, the opening degree of the duct will become larger, so as to respond to the air supply effect more quickly.

[0006] Preferably, an actuator is provided on the air duct. The actuator includes a connecting rod and at least two rocker arms. One end of the connecting rod is connected to one end of the rocker arm, and the other end of the rocker arm is connected to one end of the rotating shaft. The actuator is used to drive the rotating shaft to rotate, thereby adjusting the opening degree of the baffle. The actuator directly drives the connecting rod to act, and the number of rocker arms is the same as the number of baffle assemblies. Each rocker arm is connected to the rotating shaft of a baffle assembly. The movement of the connecting rod drives the rocker arm to move, and the rocker arm then drives the rotating shaft to move, thereby realizing the synchronous movement of the baffle assemblies and enabling the baffles to rotate synchronously for adjustment.

[0007] Preferably, the actuator further includes at least one of a manual switch and a pneumatic switch. The actuator can be driven manually or electrically controlled. Therefore, at least one of a manual switch and a pneumatic switch can be provided. Usually, both switches are provided together. When one switch fails, the other switch can be used for emergency.

[0008] Preferably, the baffle assemblies are arranged in parallel on the cross-section of the air duct, and adjacent baffles are in contact with each other when located on the cross-section of the air duct. To ensure that the air duct does not supply air in the closed state, the baffle needs to completely block the air duct. Therefore, when the baffle rotates to the cross-section of the air duct, the gap between the two baffles needs to be eliminated. Therefore, the edges of the two baffles need to be in contact with each other to eliminate the gap between the baffles.

[0009] Preferably, a contact plate is provided on one side of the baffle. To prevent the baffle from being in an inclined state in the contact state, a contact plate can be provided at the edge position on one side of the baffle. In this way, the edges between adjacent baffles can be aligned so that both baffles are located on the cross-section of the air duct, and the contact plate blocks the gap between the two baffles to achieve a sealing effect. At the same time, the contact plate can also make the two baffles contact each other to achieve the function of rotational limit.

[0010] Preferably, a number of rib structures are also provided on the baffle. Since the baffles need to be in contact with each other, a torque will be generated in the circumferential direction, which may cause the baffle to deform and the wind shielding effect to weaken. Therefore, ribs are provided on the surface of the baffle to ensure the structural strength of the baffle and make it not easily deformed.

[0011] Preferably, the baffle is of a shuttle shape. The baffle can also be of a shuttle shape. On the one hand, the middle part of the shuttle shape has a larger volume, which can strengthen the structural strength of the baffle. On the other hand, the shuttle-shaped baffle is beneficial to the air guiding effect, improving the air guiding effect and reducing the wind resistance.

[0012] Preferably, a limiting plate is provided on the air duct. To prevent the baffle from rotating excessively, a limiting plate is also provided on the air duct to further limit the baffle.

[0013] Preferably, the limiting plates are annularly distributed in the air duct. In addition to the limiting effect, arranging the limiting plates annularly in the air duct can also achieve the sealing effect between the inner wall of the air duct and the baffle, preventing air leakage and resulting in inaccurate testing.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: (1) The air supply effect of the wind baffle is better and the response speed is faster; (2) The sealing effect between the air duct and the baffle assembly is better, and it is not easy to generate air leakage, which may lead to inaccurate combustion test regulation in the heating furnace; (3) The structural strength of the wind baffle is higher, the structure is relatively simple, and it is easy to manufacture. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the heating furnace device of the present utility model.

[0016] Figure 2 It is a schematic structural diagram of the baffle assembly of the present utility model.

[0017] Figure 3 is Figure 2 the A-A cross-sectional view in

[0018] Figure 4 It is another schematic structural diagram of the baffle assembly of the present utility model.

[0019] Figure 5 is Figure 4 the B-B cross-sectional view in

[0020] In the figure: 1. Air suction port, 2. Heating furnace, 3. Chimney, 4. Baffle assembly, 5. Rotating shaft, 6. Baffle, 7. Connecting rod, 8. Rocker, 9. Air duct, 10. Manual switch, 11. Pneumatic switch, 12. Contact plate, 13. Rib plate, 14. Limiting plate, 15. Inlet air duct, 16. Outlet air duct, 17. Air duct baffle structure, 18. Flue gas CO on-line analyzer, 19. Furnace oxygen content analyzer, 20. Induced draft fan, 21. Blower, 22. Bearing seat, 23. Mounting bracket. Detailed Embodiments

[0021] The following will further specifically describe the technical solutions of the present utility model through specific embodiments in conjunction with the drawings.

[0022] Embodiment 1: As shown in Figure 1A heating furnace device shown in the figure includes an air intake 1, a heating furnace 2, and a chimney 3. An air inlet duct 15 is provided between the air intake 1 and the heating furnace 2, and an air outlet duct 16 is provided between the heating furnace 2 and the chimney 3. Four furnace chambers are provided in the heating furnace 2. Four branch air ducts are provided on the air inlet duct 15 and are connected to the four furnace chambers of the heating furnace 2. An air duct baffle structure 17 is provided on each of the four branch air ducts. Similarly, the air outlet duct 16 communicates with the heating furnace 2 and the chimney 3, and an air duct baffle structure 17 is also provided on the air outlet duct 16. The air duct baffle structure 17 can adjust the opening degrees of the air inlet duct 15 and the air outlet duct 16 to adjust the air supply volume, thereby changing the oxygen content and carbon monoxide content in the furnace chamber. The heating furnace device needs to adjust the combustion effect in the furnace by adjusting the oxygen content and carbon monoxide content in the furnace, including a flue gas CO online analyzer 18, a furnace chamber oxygen content analyzer 19, an induced draft fan 20, a blower 21, and an electric control module. This is a prior art solution and will not be elaborated here.

[0023] As Figure 2 and Figure 3 shown, an air duct baffle structure of a heating furnace device includes two baffle components 4. The baffle components 4 are arranged in the air duct 9. The baffle component 4 includes a rotating shaft 5 and a baffle 6. The air duct 9 is in the shape of a rectangular through-opening. Two bearing seat structures 22 are provided on the left and right sides of the air duct 9 respectively. Bearings (not shown in the figure) are provided in the bearing seats 22. A rotating shaft 5 is rotatably connected to the left and right bearings on the same horizontal plane. A baffle 6 structure is fixedly connected to the rotating shaft 5. The baffle 6 is symmetrically arranged with respect to the rotating shaft 5. Two baffles 6 are arranged on the cross-section of the air duct 9. The baffle 6 can rotate around the rotating shaft 5 in the air duct 9. When the planes of the two baffles 6 rotate to the cross-section of the air duct 9, the two baffles 6 can completely block the air duct 9. When the planes of the two baffles 6 are not on the cross-section of the air duct 9, there will be a ventilation space in the air duct 9, and air supply operations can be carried out in the air duct 9.

[0024] The bearing seats 22 are installed outside the air duct 9, and sealing treatment is required between the bearing seats 22 and the air duct 9 to prevent air leakage from the installation gap of the bearing seats 22 of the air duct 9 and reduce the air supply efficiency. An actuator is also provided outside the air duct 9. The actuator is arranged at the position of the rotating shaft of the baffle component 4 below it. The actuator can drive the rotating shaft 5 to rotate, thereby driving the baffle 6 to rotate. The actuator includes a mounting bracket 23, and the actuator is fixed to the outside of the air duct 9 through the mounting bracket 23. The actuator also includes a pneumatic switch 11 and a manual switch 10. The pneumatic switch 11 is controlled by an electric drive method, and the manual switch 10 is controlled manually. It should be noted that in this solution, only the pneumatic switch 11 can be set alone, or only the manual switch 10 can be set alone. Generally, usually, the two switches are set together. When one of the switches fails, the other switch can be used for emergency.

[0025] The actuator further includes a connecting rod 7 structure and a rocker 8 structure. Among them, there is one connecting rod 7, and there are two rockers 8. The rocker 8 and the connecting rod 7 are both arranged on the side of the air duct 9 away from the manual switch 10 and the pneumatic switch 11, that is, on the left side of the air duct 9. One end of each of the two rockers 8 is rotatably connected to the connecting rod 7, and the other end of the two rockers 8 is fixedly connected to the rotating shaft 5. When the connecting rod 7 swings, it will drive the two rockers 8 to swing synchronously, thereby driving the rotating shaft 5 to swing synchronously.

[0026] Specifically, driven by the actuator, the rotating shaft on the lower side of the air duct 9 is driven to rotate. The rotating shaft on the lower side drives the connecting rod to rotate through the rocker on the lower side. The connecting rod 7 drives the rocker on the upper side to swing, and the rocker on the upper side drives the rotating shaft on the upper side to rotate. Thus, the rotating shafts on the upper and lower sides can rotate synchronously, that is, the baffle 6 on the rotating shaft 5 can swing synchronously to adjust the opening degree of the air duct 9. Since there are two baffles 6, the opening between the baffle 6 and the air duct 9 will increase (the increased opening is the opening formed between the baffles 6). Therefore, when the rotation angle of the rotating shaft 5 remains unchanged (when the rotation angle is relatively small), the opening degree of the air duct 9 will become larger, so as to respond to the air supply effect faster.

[0027] When the upper and lower two baffles 6 are in the vertical state, that is, when the baffle 6 is located on the cross-section of the air duct 9, the two baffles 6 are in contact with each other. Specifically, the lower side of the upper baffle overlaps with the upper side of the lower baffle, thereby eliminating the gap between the two baffles 6. In this solution, both of the two baffles 6 are of a structure with a fusiform cross-section (as Figure 3 shown). Therefore, when the two baffles 6 overlap vertically, both of the two baffles 6 can be in the vertical state. In addition, the baffle 6 adopts a fusiform structure. On the one hand, the middle part of the fusiform structure has a larger volume, which can strengthen the structural strength of the baffle 6 and prevent the baffle 6 from deforming due to the abutting force. On the other hand, the fusiform baffle 6 is beneficial to the air guiding effect, improving the air guiding effect and reducing the air resistance.

[0028] A limiting plate 14 structure is also arranged on the air duct 9, as Figure 2 and Figure 3 shown. The limiting plates 14 are distributed around the inner wall of the air duct 9. For the limiting plates 14 on the upper and lower sides, the two limiting plates 14 are distributed on the left and right sides of the baffle assembly 4 to ensure that the baffle 6 can rotate normally. Specifically, as Figure 3 shown, the upper limiting plate 14 is located on the right side of the upper baffle, and the lower limiting plate 14 is located on the left side of the lower baffle. At the overlapping point position between the upper baffle and the lower baffle, the upper baffle is located on the right side of the lower baffle. Thus, the upper and lower two baffles 6 can rotate counterclockwise around their respective rotating shafts 5. When the baffle 6 rotates clockwise to the vertical state, the overlapping point of the upper and lower two baffles 6 and the upper and lower two limiting plates 14 will both play a limiting role in the clockwise rotation of the baffle 6.

[0029] It should also be noted that limiting plates 14 are provided on the left and right sides of the air duct 6, so that there are limiting plate 14 structures on the inner wall ring part of the air duct 9. It should be noted that the limiting plates 14 on both sides of the air duct 9 are provided corresponding to the separate baffle components 4, and a separate limiting plate 14 is provided at the position of each baffle component 4. And in order not to interfere with the rotation of the baffle 6, the limiting plates 14 also need to be provided on the front and rear sides of the baffle 6. Specifically, as Figure 2 shown, at the position of the upper baffle, and on the upper side of the rotating shaft of the upper baffle, the limiting plate 14 is provided on the front side of the baffle (represented by a dotted line). At the position of the upper baffle, and on the lower side of the rotating shaft of the upper baffle, the limiting plate 14 is provided on the rear side of the baffle (represented by a solid line); thus, the upper side of the upper baffle rotates forward, and the lower side of the upper baffle swings backward. (Here, the front refers to perpendicular to the figure and inward, and the rear refers to perpendicular to the figure and outward). The limiting plates 14 on both left and right sides can not only further play a limiting role, but also play a sealing effect when the baffle 6 is located in the cross-section of the air duct 9, preventing the air volume in the air duct from leaking and affecting the experimental effect.

[0030] Embodiment 2: As Figure 1 shown, a heating furnace device includes an air suction port 1, a heating furnace 2 and a chimney 3. An air inlet duct 15 is provided between the air suction port 1 and the heating furnace 2, and an air outlet duct 16 is provided between the heating furnace 2 and the chimney 3. Four furnace cavities are provided in the heating furnace 2. Four branch air ducts are provided on the air inlet duct 15 and are connected to the four furnace cavities of the heating furnace 2. A duct baffle structure 17 is provided on each of the four branch air ducts. Similarly, the air outlet duct 16 communicates the heating furnace 2 and the chimney 3, and a duct baffle structure 17 is also provided on the air outlet duct 16. The duct baffle structure 17 can adjust the opening degrees of the air inlet duct 15 and the air outlet duct 16 to adjust the air supply volume, so as to change the oxygen content and carbon monoxide content in the furnace cavity. The heating furnace device needs to adjust the combustion effect in the furnace by adjusting the oxygen content and carbon monoxide content in the furnace, including a flue gas CO online analyzer 18, a furnace chamber oxygen content analyzer 19, an induced draft fan 20, a blower 21 and an electric control module. This is an existing technical solution and will not be elaborated here.

[0031] As Figure 4 and Figure 5The air duct baffle structure of a heating furnace device shown in the figure includes four baffle assemblies 4. The baffle assemblies 4 are arranged in the air duct 9. The baffle assembly 4 includes a rotating shaft 5 and a baffle 6. The air duct 9 is in the shape of a circular through-port. On the left and right sides of the air duct 9, there are four bearing seat structures 22 each. A bearing (not shown in the figure) is arranged in the bearing seat 22. A rotating shaft 5 is rotatably connected to the left and right bearings on the same horizontal plane. A baffle 6 structure is fixedly connected to the rotating shaft 5. The baffle 6 is arranged on the rotating shaft 5 and can swing. Four baffles 6 are arranged on the cross-section of the air duct 9. The baffle 6 can rotate around the rotating shaft 5 in the air duct 9. When the planes of the two baffles 6 rotate to the cross-section of the air duct 9, the four baffles 6 can completely block the air duct 9. When the planes of the four baffles 6 are not on the cross-section of the air duct 9, there will be a ventilation space in the air duct 9, and air supply operation can be carried out in the air duct 9.

[0032] The bearing seat 22 is installed outside the air duct 9, and sealing treatment is required between the bearing seat 22 and the air duct 9 to prevent air leakage from the installation gap of the bearing seat 22 of the air duct 9 and reduce the air supply efficiency. An actuator is also arranged outside the air duct 9. The actuator is arranged at the position of the rotating shaft of the baffle assembly 4 below and in the middle of it. The actuator can drive the rotating shaft 5 to rotate, thereby driving the baffle 6 to rotate. The actuator includes a mounting bracket 23, and the actuator is fixed to the outside of the air duct 9 through the mounting bracket 23. The actuator also includes a pneumatic switch 11 and a manual switch 10. The pneumatic switch 11 is controlled by an electric drive method, and the manual switch 10 is controlled manually. It should be noted that in this solution, only the pneumatic switch 11 can be set separately, or only the manual switch 10 can be set separately. Generally, usually, the two switches are set together. When one of the switches fails, the other switch can be used for emergency.

[0033] The actuator also includes a connecting rod 7 structure and a rocker 8 structure. Among them, one connecting rod 7 is provided, and four rockers 8 are provided. The rocker 8 and the connecting rod 7 are both arranged on the side of the air duct 9 close to the manual switch 10 and the pneumatic switch 11, that is, on the left side of the air duct 9. One end of each of the four rockers 8 is rotatably connected to the connecting rod 7, and the other end of the four rockers 8 is fixedly connected to the rotating shaft 5. When the connecting rod 7 swings, it will drive the four rockers 8 to swing synchronously, so as to realize the synchronous swing of the four rotating shafts 5.

[0034] Specifically, driven by the actuator, one of the rotating shafts on the lower side of the air duct 9 is rotated. The rotating shaft on the lower side drives the connecting rod to rotate through the rocker on the lower side. The connecting rod 7 drives the other three rockers 8 to swing, and the corresponding rocker 8 drives the corresponding rotating shaft 5 to rotate. Thus, all the rotating shafts 5 can rotate synchronously, that is, the baffles 6 on the rotating shafts 5 can swing synchronously to adjust the opening degree of the air duct 9. Since there are four baffles 6, the openings between the baffles 6 and the air duct 9 will increase (the increased opening degree is formed between the baffles 6). Thus, when the rotation angle of the rotating shaft 5 remains unchanged (when the rotation angle is relatively small), the opening degree of the air duct 9 will become larger, so as to respond to the air supply effect faster.

[0035] When the four baffles 6 are in the vertical state, that is, when the baffles 6 are located on the cross-section of the air duct 9, the four baffles 6 are in contact with each other. Specifically, the adjacent upper and lower baffles 6 overlap each other, thus eliminating the gap between the two baffles 6.

[0036] In this solution, the four baffles 6 are all structures with a rectangular cross-section (as Figure 5 shown), and a contact plate 12 is fixedly connected to one side of the baffle 6. The fixing method can be welding. Specifically, for the two upper baffles, the contact plate 12 is welded to the upper side of the lower baffle, and the contact plate 12 is welded to the left side of the baffle 6. Similarly, for the two middle baffles 6, the contact plate 12 is welded to the upper side of the lower baffle, and the contact plate 12 is welded to the left side of the baffle. The same arrangement is made for the two lower baffles. Therefore, when the four baffles 6 overlap each other vertically, the four baffles 6 can be in the same vertical plane without tilting. The contact plate 12 blocks the gap between two adjacent baffles 6 to achieve a sealing effect. At the same time, the contact plate 12 can also make the two baffles 6 contact each other to achieve the function of rotational limit.

[0037] A limiting plate 14 structure is also provided on the air duct 9, as Figure 4 and Figure 5 shown. The limiting plates 14 are distributed around the inner wall of the air duct 9. For the upper and lower limiting plates 14, the two limiting plates 14 are distributed on the same side of the baffle assembly 4 (since the arrangement of the four baffles 6 and the position of the contact plate 12 are the same) to ensure that the baffle 6 can rotate normally. Specifically, as Figure 5As shown, the uppermost limiting plate 14 is located on the right side of the upper baffle, and the lowermost limiting plate 14 is located on the right side of the lower baffle. Between two adjacent baffles 6, the upper side of the lower baffle and the abutting plate 12 are always welded on the left side, so that the four baffles 6 can rotate counterclockwise around their respective rotating shafts 5. When the baffle 6 rotates clockwise to the vertical state, the overlapping points of two adjacent baffles 6 and the upper and lower limiting plates 14 will all play a role in limiting the clockwise rotation of the baffle 6. It should be noted that since the baffle 6 in this solution is a flat plate structure, in order to ensure the structural strength of the baffle 6, a plurality of rib plates 13 are also provided on the surface of the baffle 6.

[0038] It should also be noted that limiting plates 14 are also provided on the left and right sides of the air duct 6, so that there is a limiting plate 14 structure on the inner wall ring part of the air duct 9. It should be noted that the limiting plates 14 on both sides of the air duct 9 are provided corresponding to the separate baffle assemblies 4, and a separate limiting plate 14 is provided at each position of the baffle assembly 4. And in order not to interfere with the rotation of the baffle 6, the limiting plates 14 also need to be provided on the front and rear sides of the baffle 6. Specifically, as Figure 4 shown, at the position of the uppermost baffle and above the rotating shaft of the baffle, the limiting plate 14 is provided on the front side of the baffle (indicated by a dotted line), and at the position of the uppermost baffle and below the rotating shaft of the baffle, the limiting plate 14 is provided on the rear side of the baffle (indicated by a solid line); thus, the upper side of the upper baffle rotates forward, and the lower side of the upper baffle swings backward. (Here, the front refers to inward perpendicular to the drawing, and the rear refers to outward perpendicular to the drawing). The limiting plates 14 on the left and right sides can not only further play a role in limiting, but also play a sealing effect when the baffle 6 is located in the cross-section of the air duct 9, preventing the air duct from leaking air volume and affecting the experimental effect.

[0039] Embodiment 3: On the basis of Embodiment 1 and Embodiment 2, any combination of the different technical solutions in the two embodiments can form a separate embodiment, and all of them also fall within the protection scope of this solution.

Claims

1. An air duct baffle structure of a heating furnace device, the heating furnace device comprising an air inlet and a heating furnace, the heating furnace being connected to a chimney, characterized in that: An air duct baffle is provided between the heating furnace and the air intake port and between the heating furnace and the chimney. The air duct baffle includes at least two baffle assemblies. The baffle assembly includes a rotating shaft and a bearing arranged on the air duct. Both ends of the rotating shaft are arranged in the bearings. A baffle is provided on the rotating shaft.

2. The air duct baffle structure of a heating furnace device according to claim 1, characterized in that: The air duct is provided with an actuator, which includes a connecting rod and at least two rocking arms. The connecting rod is connected to one end of the rocking arm, and the other end of the rocking arm is connected to one end of the rotating shaft.

3. The air duct baffle structure of a heating furnace device according to claim 2, characterized in that: The actuator also includes at least one of a manual switch and a pneumatic switch.

4. The air duct baffle structure of a heating furnace device according to claim 1, characterized in that: The baffle assembly is arranged in parallel on the cross section of the air duct, and adjacent baffles abut against each other when located on the cross section of the air duct.

5. The air duct baffle structure of a heating furnace device according to claim 4, characterized in that: A contact plate is provided on one side of the baffle.

6. The air duct baffle structure of a heating furnace device according to claim 1, characterized in that: The baffle is also provided with a plurality of rib structures.

7. The air duct baffle structure of a heating furnace device according to claim 1, characterized in that: The baffle is a shuttle-shaped structure.

8. The air duct baffle structure of a heating furnace device according to any one of claims 1 to 7, characterized in that: A limiting plate is arranged on the air duct.

9. The air duct baffle structure of a heating furnace device according to claim 8, characterized in that: The limiting plates are distributed in an annular manner in the air duct.

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