An arc-shaped wind baffle for an air duct

Abstract

The utility model discloses an arc wind -baffle for air duct relates to air duct field, the utility model discloses a shell is provided with four arc wind -baffles in the inside, and the outer surface of shell is installed with cover body. The utility model discloses through being provided with threaded seal cover, jack, linkage shaft and pivot, when arc wind -baffle needs to be disassembled to replace it, the staff can first unfasten the lock catch on cover body, open the sealing plate, rotate threaded seal cover again, can spin out threaded seal cover and remove to draw plate limit, then through draw plate and draw linkage shaft, make linkage shaft move from arc wind -baffle inside, take down arc wind -baffle, when installing arc wind -baffle, only need to make the jack on arc wind -baffle and the jack on pivot align, then again insert linkage shaft to the inside of jack, in order to carry out the limit to arc wind -baffle, again screw cover on pivot and draw plate limit, through this mode can simplify the dismounting step of arc wind -baffle.

Description

Technical Field

[0001] This utility model relates to the field of air ducts, specifically an arc-shaped wind deflector for air ducts. Background Technology

[0002] The arc-shaped baffle plate in the secondary air duct of a boiler, often technically referred to as a secondary air regulating damper or louvered regulating baffle, is an airflow regulating device installed in the secondary air duct of a power plant or industrial boiler. Its core function is to control the volume of secondary air supplied from the air preheater outlet to the burner (such as a pulverized coal burner), thereby ensuring the optimal mixing ratio of fuel and air inside the boiler. It is one of the key auxiliary equipment for achieving efficient, stable, and low-pollution (low nitrogen oxide) combustion in boilers. Because its core regulating component consists of multiple synchronously rotating arc-shaped blades, it has earned this descriptive name in the industry.

[0003] Over time, the curved wind deflector may become permanently twisted due to fly ash erosion or material aging, making it impossible to return to its normal shape, or it may develop cracks. This can lead to inaccurate adjustment and serious air leakage. Even after a thorough overhaul (cleaning, adjustment, and bearing replacement), the leakage rate of the damper may still be seriously excessive, which seriously affects the economy and safety of the boiler at low load (such as the inability to effectively isolate the system after shutdown). Therefore, it is necessary to replace the damaged wind deflector.

[0004] The existing curved wind deflectors used in air ducts are bolted to the shaft by bolt holes on the edge, so that the shaft can rotate and drive the curved wind deflectors to rotate. However, the curved wind deflectors may be damaged after being washed by fly ash for a long time. Disassembling and replacing the curved wind deflectors requires unscrewing the bolts one by one, and installing them requires precisely aligning the bolt holes and tightening the bolts one by one. The process is cumbersome, time-consuming and labor-intensive, making the disassembly and assembly difficult and reducing the efficiency of disassembly and replacement of the curved wind deflectors. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide an arc-shaped wind deflector for air ducts to solve the technical problem of inconvenience in disassembling and replacing arc-shaped wind deflectors.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an arc-shaped wind deflector for a duct, comprising a housing, four arc-shaped wind deflectors disposed inside the housing, a cover mounted on the outer surface of the housing, four rotating shafts extending into the housing being connected inside the cover via sealed bearings, and insertion holes being provided inside the rotating shafts and the arc-shaped wind deflectors, with a linkage shaft inserted inside the insertion holes, one end of the linkage shaft penetrating to the outside of the rotating shaft and being fitted with a pull plate, and a threaded sealing cap being threadedly connected to the outer wall of the rotating shaft.

[0007] By adopting the above technical solution, the rotation of the rotating shaft will drive the linkage shaft to rotate, and the linkage shaft will drive the arc-shaped wind deflector to rotate, thereby adjusting the angle of the arc-shaped wind deflector.

[0008] Furthermore, the inner wall of the housing is provided with four positioning holes, and the other end of the linkage shaft is equipped with a positioning post extending into the positioning hole, the positioning post being adapted to the positioning hole.

[0009] By adopting the above technical solution, the stability of the linkage shaft during rotation can be improved after the positioning pin is inserted into the positioning hole.

[0010] Furthermore, a drive motor is installed inside the cover, and the output end of the drive motor is connected to a worm gear, with one end of the worm gear connected to the inner wall of the cover via a bearing.

[0011] By adopting the above technical solution, when it is necessary to adjust the angle of the arc-shaped wind deflector, the staff can start the drive motor, and the drive motor can drive the worm gear to rotate.

[0012] Furthermore, a worm gear is installed on the outer wall of the shaft, and the worm gear meshes with the worm.

[0013] By adopting the above technical solution, the rotation of the worm will drive the rotation of the worm wheel, and the worm wheel will drive the rotation of the shaft.

[0014] Furthermore, a sealing plate is installed on the outer surface of the cover via a hinge, and two latches are installed between the sealing plate and the cover.

[0015] By adopting the above technical solution, the latch can lock the sealing plate, preventing the sealing plate from being rotated and opened at will.

[0016] Furthermore, the back of the sealing plate is provided with a sealing gasket, and the outer wall of the sealing gasket is in contact with the inner wall of the cover, and the sealing gasket can be a flexible graphite metal toothed gasket.

[0017] By adopting the above technical solution, the sealing gasket can improve the sealing performance between the sealing plate and the cover.

[0018] Furthermore, a first sealing strip is installed on the outer wall of the arc-shaped wind deflector, and a second sealing strip is installed on the bottom of the arc-shaped wind deflector. Both the first and second sealing strips can be made of Inconel alloy wire.

[0019] By adopting the above technical solution, the setting of the first sealing strip can improve the sealing performance between the arc-shaped windshield and the housing.

[0020] Furthermore, four grooves are provided inside the socket, and four protrusions that fit the grooves are installed on the outer wall of the linkage shaft, and the linkage shaft is adapted to the socket.

[0021] By adopting the above technical solution, it is convenient to insert the linkage shaft into the socket so as to position the linkage shaft.

[0022] Furthermore, the arc-shaped wind deflector is sleeved on the outer wall of the linkage shaft, the linkage shaft is detachably connected to the arc-shaped wind deflector, and the arc-shaped wind deflector is detachably connected to the housing.

[0023] By adopting the above technical solution, the linkage shaft can be removed from the arc-shaped wind deflector, and the arc-shaped wind deflector can also be removed from the housing.

[0024] Furthermore, the outer surface of the pull plate is fitted with the threaded sealing cap.

[0025] By adopting the above technical solution, the threaded sealing cover can position the pull plate, preventing the pull plate and the linkage shaft from moving arbitrarily, thereby improving the stability of the linkage shaft.

[0026] In summary, the present invention has the following main advantages: 1. This utility model, by providing a threaded sealing cover, insertion hole, linkage shaft, rotating shaft, and pull plate, allows for easy replacement of the arc-shaped windshield. Workers can first unlock the latch on the cover, then open the sealing plate using the hinge, and then rotate the threaded sealing cover to unscrew it and release the pull plate's limiting position. The pull plate then pulls the linkage shaft, causing it to move out of the arc-shaped windshield, allowing the windshield to be removed. When installing the arc-shaped windshield, simply align the insertion hole on the arc-shaped windshield with the insertion hole on the rotating shaft, then insert the linkage shaft into the insertion hole to limit the arc-shaped windshield. Finally, screw the threaded sealing cover onto the rotating shaft and limit the pull plate. This completes the installation of the arc-shaped windshield. This method simplifies the disassembly and assembly steps of the arc-shaped windshield, thereby improving the efficiency of disassembly and assembly. 2. This utility model has a positioning post and a positioning hole. When the positioning post is inserted into the positioning hole, it can improve the stability of the linkage shaft during rotation and improve the stability of the arc-shaped wind deflector. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the overall side structure of this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the shell of this utility model; Figure 4 This is a schematic diagram of the overall top sectional structure of this utility model; Figure 5 This is a schematic diagram of the arc-shaped windbreak structure of this utility model; Figure 6This is a schematic diagram of the linkage shaft structure of this utility model; Figure 7 This is a bottom view of the arc-shaped windbreak structure of this utility model; Figure 8 For the present utility model Figure 6 A magnified structural diagram of point A in the middle.

[0028] In the diagram: 1. Housing; 2. Linkage shaft; 3. Arc-shaped wind deflector; 4. Insertion hole; 5. Positioning hole; 6. Positioning post; 7. Cover; 8. Sealing plate; 9. Lock; 10. Sealing gasket; 11. Hinge; 12. Worm gear; 13. Drive motor; 14. Worm wheel; 15. Sealed bearing; 16. Rotating shaft; 17. Threaded sealing cover; 18. Pull plate; 19. First sealing strip; 20. Second sealing strip. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The embodiments of this utility model will be described below based on its overall structure.

[0031] Example 1:

[0032] A type of curved wind deflector for air ducts, such as Figures 1-8 As shown, the device includes a housing 1, inside which are four arc-shaped wind deflectors 3. A cover 7 is installed on the outer surface of the housing 1. Inside the cover 7, four rotating shafts 16 extending into the housing 1 are connected by sealed bearings 15. Insertion holes 4 are provided inside the rotating shafts 16 and the arc-shaped wind deflectors 3. A linkage shaft 2 is inserted into the insertion hole 4. One end of the linkage shaft 2 passes through the outside of the rotating shaft 16 and is fitted with a pull plate 18. A threaded sealing cover 17 is threadedly connected to the outer wall of the rotating shaft 16. When the rotating shaft 16 rotates, it drives the linkage shaft 2 to rotate, which in turn drives the arc-shaped wind deflectors 3 to rotate, thereby adjusting the angle of the arc-shaped wind deflectors 3. The linkage shaft 2 is made of 20CrMnTi alloy structural steel (and the manufacturing process of the linkage shaft 2 requires surface quenching and then low-temperature tempering).

[0033] See Figures 1-7The enclosure 7 houses a drive motor 13, which is electrically connected to an external control system for easy start-up and shutdown. The output of the drive motor 13 is connected to a worm gear 12, one end of which is connected to the inner wall of the enclosure 7 via a bearing. The worm gear 12 is made of 40CrNiMoA alloy structural steel (nitrided surface). When adjusting the angle of the arc-shaped wind deflector 3, the operator can start the drive motor 13, which drives the worm gear 12 to rotate. A worm wheel 14 is mounted on the outer wall of the shaft 16, meshing with the worm gear 12. Rotation of the worm gear 12 drives the worm wheel 14 to rotate. 14 will drive the rotating shaft 16 to rotate. The linkage shaft 2 and the arc-shaped wind deflector 3 are detached and connected. The worm gear 14 is made of ZCuSn10P1 tin bronze. The arc-shaped wind deflector 3 is sleeved on the outer wall of the linkage shaft 2. The arc-shaped wind deflector 3 is detached and connected to the housing 1. The linkage shaft 2 can be taken out from the arc-shaped wind deflector 3. At the same time, the arc-shaped wind deflector 3 can also be removed from the housing 1. The outer surface of the pull plate 18 is in contact with the threaded sealing cover 17. The threaded sealing cover 17 can position the pull plate 18 to prevent the pull plate 18 and the linkage shaft 2 from moving at will, thereby improving the stability of the linkage shaft 2. The threaded sealing cover 17 is made of Q235 steel (and the surface is galvanized and then passivated).

[0034] See Figures 1-5 A sealing plate 8 is installed on the outer surface of the cover 7 via a hinge 11. Two latches 9 are installed between the sealing plate 8 and the cover 7. The latches 9 can lock the sealing plate 8 to prevent it from being opened by rotation. A first sealing strip 19 is installed on the outer wall of the arc-shaped wind deflector 3. The outer wall of the first sealing strip 19 fits against the inner wall of the housing 1. A second sealing strip 20 is installed at the bottom of the arc-shaped wind deflector 3. Both the first sealing strip 19 and the second sealing strip 20 can be made of Inconel alloy wire. The setting of the first sealing strip 19 can improve the sealing performance between the arc-shaped wind deflector 3 and the housing 1. A sealing gasket 10 is provided on the back of the sealing plate 8. The outer wall of the sealing gasket 10 fits against the inner wall of the cover 7. The sealing gasket 10 can be a flexible graphite metal toothed gasket. The setting of the sealing gasket 10 can improve the sealing performance between the sealing plate 8 and the cover 7.

[0035] Example 2:

[0036] Based on the above embodiment 1, in order to improve the stability of the linkage shaft 2 and the arc-shaped wind deflector 3, the following structure will be set.

[0037] Specifically, the inner wall of the housing 1 has four positioning holes 5. The other end of the linkage shaft 2 is equipped with a positioning post 6 that extends into the positioning hole 5. The positioning post 6 is adapted to the positioning hole 5. The positioning post 6 can be made of stainless steel (such as 316L). After the positioning post 6 is inserted into the positioning hole 5, it can improve the stability of the linkage shaft 2 when rotating.

[0038] Example 3:

[0039] Based on the above embodiment 1, in order to enable the linkage shaft 2 to rotate and drive the arc-shaped windshield 3 to rotate, the following structure will be set.

[0040] Specifically, four grooves are provided inside the socket 4, and four protrusions that fit the grooves are installed on the outer wall of the linkage shaft 2. The linkage shaft 2 fits into the socket 4, making it easy for the linkage shaft 2 to be inserted into the socket 4 for positioning. When the linkage shaft 2 rotates, it will also drive the arc-shaped wind deflector 3 to rotate, so as to adjust the angle of the arc-shaped wind deflector 3.

[0041] The working principle of this utility model is as follows: First, when it is necessary to adjust the air volume, the operator can start the drive motor 13 inside the cover 7. The output end of the drive motor 13 drives the worm gear 12 to rotate around its own axis. The worm gear 12 meshes with the worm wheel 14 on the outer wall of the four rotating shafts 16, transmitting the rotational motion of the drive motor 13 to the rotating shafts 16, causing the four rotating shafts 16 to rotate synchronously. The rotating shafts 16 then drive the linkage shaft 2 to rotate synchronously. The positioning pin 6 at the other end of the linkage shaft 2 rotates in the positioning hole 5 of the housing 1, limiting the radial sway of the linkage shaft. At the same time, the linkage shaft 2 drives the arc-shaped wind deflector 3 to rotate, changing the angle between the arc-shaped wind deflector 3 and the airflow. When the arc-shaped wind deflector 3 is rotated and closed, the first sealing strip 19 on its outer wall fits against the inner wall of the housing 1, and the second sealing strip 20 at the bottom fits against the adjacent arc-shaped wind deflector 3 or the housing 1, thereby improving the sealing effect between the arc-shaped wind deflector 3 and the housing 1. When the curved wind deflector 3 needs to be replaced, the operator can first unlock the latch 9 on the sealing plate 8, then flip the sealing plate 8 open; then rotate the threaded sealing cover 17 to disengage it from the rotating shaft 16, pull the pull plate 18 to pull the linkage shaft 2 out of the insertion hole 4, and at the same time, the positioning pin 6 disengages from the positioning hole 5; finally, remove the old curved wind deflector 3, and to replace the new curved wind deflector 3, simply reverse the operation (first insert the linkage shaft 2, then tighten the threaded sealing cover 17, and then close the sealing plate 8), thus completing the disassembly and replacement of the curved wind deflector.

[0042] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An arc-shaped wind deflector for a wind duct, comprising a housing (1), characterized in that: The housing (1) is provided with four arc-shaped wind deflectors (3) inside. The outer surface of the housing (1) is covered with a cover (7). The cover (7) is connected to four rotating shafts (16) extending into the housing (1) through a sealed bearing (15). The rotating shafts (16) and the arc-shaped wind deflectors (3) are provided with insertion holes (4). A linkage shaft (2) is inserted into the insertion hole (4). One end of the linkage shaft (2) passes through to the outside of the rotating shaft (16) and is fitted with a pull plate (18). The outer wall of the rotating shaft (16) is threaded with a threaded sealing cap (17).

2. The arc-shaped windbreak for a wind duct according to claim 1, characterized in that: The inner wall of the housing (1) is provided with four positioning holes (5), and the other end of the linkage shaft (2) is provided with a positioning post (6) extending into the positioning hole (5), and the positioning post (6) is adapted to the positioning hole (5).

3. The arc-shaped windbreak for a wind duct according to claim 1, characterized in that: The inside of the cover (7) is equipped with a drive motor (13), the output end of the drive motor (13) is connected to a worm (12), and one end of the worm (12) is connected to the inner wall of the cover (7) through a bearing.

4. The arc-shaped windbreak for a wind duct according to claim 1, characterized in that: A worm wheel (14) is installed on the outer wall of the shaft (16), and the worm wheel (14) meshes with the worm (12).

5. The arc-shaped wind deflector for a wind duct according to claim 1, characterized in that: A sealing plate (8) is installed on the outer surface of the cover (7) via a hinge (11), and two latches (9) are installed between the sealing plate (8) and the cover (7).

6. The arc-shaped wind deflector for a wind duct according to claim 5, characterized in that: The back of the sealing plate (8) is provided with a sealing gasket (10), and the outer wall of the sealing gasket (10) is in contact with the inner wall of the cover (7), and the sealing gasket (10) can be a flexible graphite metal toothed gasket.

7. The arc-shaped wind deflector for a wind duct according to claim 1, characterized in that: The outer wall of the arc-shaped wind deflector (3) is equipped with a first sealing strip (19), and the bottom of the arc-shaped wind deflector (3) is equipped with a second sealing strip (20). Both the first sealing strip (19) and the second sealing strip (20) can be made of Inconel alloy wire.

8. The arc-shaped wind deflector for a wind duct according to claim 1, characterized in that: The socket (4) has four grooves, and the outer wall of the linkage shaft (2) is fitted with four protrusions that fit the grooves. The linkage shaft (2) is adapted to the socket (4).

9. The arc-shaped wind deflector for a wind duct according to claim 1, characterized in that: The arc-shaped wind deflector (3) is sleeved on the outer wall of the linkage shaft (2). The linkage shaft (2) is detachably connected to the arc-shaped wind deflector (3). The arc-shaped wind deflector (3) is detachably connected to the housing (1).

10. An arc-shaped windbreak for a wind duct according to claim 1, characterized in that: The outer surface of the pull plate (18) is in contact with the threaded sealing cap (17).

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