Centrifugal ventilator for waste gas treatment

Abstract

The utility model belongs to the technical field of waste gas treatment, and particularly relates to a centrifugal fan for waste gas treatment, which comprises a centrifugal fan and a ventilation pipe, and further comprises two first bidirectional threaded rods, two second bidirectional threaded rods, two clamping plates, a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, two limiting grooves are formed in the two clamping plates correspondingly, and two clamping blocks are slidably connected into the limiting grooves. The driving assembly is located in the ventilation pipe and used for driving the two first bidirectional threaded rods to rotate; the filter plate is inserted between the two limiting grooves, and the filter plate is located among the multiple clamping blocks; the two sliding grooves are formed in the two clamping plates respectively and communicated with the two limiting grooves respectively, and two sliding blocks are connected into the sliding grooves in a sliding mode. The centrifugal fan solves the problem that when a centrifugal fan is used, a filter plate in a ventilation pipe of the centrifugal fan can shake in the using process, and the filtering effect is affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, and in particular relates to a centrifugal fan for waste gas treatment. Background Art

[0002] Centrifugal fans for waste gas treatment, referred to as centrifugal fans, are important power equipment in waste gas treatment systems. In the field of waste gas treatment, centrifugal fans are mainly used to extract waste gas from the source and transport it to the waste gas treatment equipment for purification to meet emission standards.

[0003] For example, Chinese patent announcement number CN221482188U discloses a centrifugal fan for exhaust gas treatment, including a box body, wherein an impeller for sucking exhaust gas is provided in the box body, a ventilation pipe for transmitting the sucked air flow is provided on one side of the box body, a filter plate for filtering the sucked air flow is provided in the ventilation pipe, and two springs for uniformly clamping filter plates of various sizes are symmetrically provided in the ventilation pipe, an auxiliary block for assisting in changing the transport direction is symmetrically provided on one side of the ventilation pipe, and a transport pipe for flexibly changing the airflow transport direction of the overall device is provided on one side of the two auxiliary blocks, and a plurality of brackets for supporting the overall device are provided at the bottom of the box body. The utility model uses parts such as replacement blocks and springs, and when the overall device needs to clamp filter plates of different sizes, the springs and replacement blocks are used to flexibly clamp the filter plates of different sizes, thereby avoiding the inability to use filter plates of different sizes.

[0004] The above patent has the following problems:

[0005] This patent has some drawbacks during use. For example, the centrifugal fan uses a replacement block and spring to secure filter plates of any size. However, the replacement block and spring cannot stably secure the filter plates between the two replacement blocks. As a result, the filter plates inside the ventilation pipe may wobble during use, affecting the filtration effect. In view of this, we propose a centrifugal fan for exhaust gas treatment. Utility Model Content

[0006] The purpose of the present utility model is to provide a centrifugal fan for waste gas treatment to solve the problems raised in the above background technology.

[0007] In view of this, the utility model provides a centrifugal fan for exhaust gas treatment, comprising a centrifugal fan and a ventilation pipe, and further comprising:

[0008] Two first bidirectional threaded rods, the two first bidirectional threaded rods are rotatably connected to the inner wall of the centrifugal fan, two clamping plates are threadedly connected between the two first bidirectional threaded rods, two limiting grooves are respectively defined on the two clamping blocks are slidably connected in the limiting grooves;

[0009] A driving assembly, the driving assembly being located in the ventilation duct and configured to drive the two first bidirectional threaded rods to rotate;

[0010] A filter plate, the filter plate being inserted between the two limiting grooves and located between the multiple clamping blocks;

[0011] Two chutes, the two chutes are respectively opened in the two clamping plates and are respectively connected to the two limit grooves, two sliders are slidably connected in the chutes, and one end of the two sliders extends into the limit grooves and is respectively fixed to the two clamping blocks;

[0012] Two adjustment components are respectively located in the two clamping plates and are used to respectively adjust the distance between the corresponding two sliders.

[0013] Based on the above structure, by providing the ventilation pipe and the first bidirectional threaded rod, it is ensured that the two first bidirectional threaded rods can rotate on the inner wall of the ventilation pipe, and by providing the driving assembly, it is ensured that the user can drive the two first bidirectional threaded rods to rotate through the driving assembly, and by providing the clamping plate, it is ensured that when the two first bidirectional threaded rods rotate, the two clamping plates will be respectively affected by the threads of the two first bidirectional threaded rods to move closer to or away from each other, and by providing the limiting groove and filter plate, it is ensured that the filter plate can be inserted between the two filter plates, and when the two clamping plates move to the appropriate position, the two clamping plates can respectively clamp the filter plate through the two limiting grooves, and by providing the clamping block, the slide groove and the slider, it is ensured that the two sliders can slide in the slide groove, so that the two sliders can respectively drive the two clamping blocks to slide in the limiting groove, and by providing the adjusting assembly, it is ensured that the user can drive the two sliders to move closer to or away from each other through the adjusting assembly, so that the two sliders respectively drive the two clamping blocks to move away from or close to each other, so that the two clamping blocks can limit the other two sides of the filter plate.

[0014] In the above technical solution, further, the driving component includes:

[0015] Two gear grooves, the two gear grooves are opened in the ventilation pipe and are connected to the inner cavity of the centrifugal fan, the two gear grooves are respectively rotatably connected to two first bevel gears, and one end of the two first bevel gears extends into the inner cavity of the ventilation pipe and is respectively fixed to one end of two first bidirectional threaded rods, one side of the two first bevel gears is respectively engaged with two second bevel gears, and the two second bevel gears are respectively located in the two gear grooves and are respectively rotatably connected to the two gear grooves;

[0016] A through slot is provided in the ventilation pipe and is connected to the two gear slots. A connecting rod is rotatably connected in the through slot, and both ends of the connecting rod extend into the two gear slots and are fixed to the two second bevel gears respectively.

[0017] a first rotating groove, the first rotating groove being formed on an inner wall of the through groove, wherein a worm gear fixed to the connecting rod is rotatably connected in the first rotating groove;

[0018] a second rotating groove, the second rotating groove being formed on an inner wall of the first rotating groove, wherein a worm meshing with the worm wheel is rotatably connected in the second rotating groove;

[0019] The motor slot is opened on the inner wall of the second rotating slot, a motor is fixedly connected in the motor slot, and the output shaft of the motor extends into the second rotating slot and is fixed to one end of the worm.

[0020] In this technical solution, it is ensured that the two clamping plates can clamp two sides of the filter plate.

[0021] In the above technical solution, further, one end of the two first bevel gears is rotatably connected to the ventilation pipe.

[0022] In this technical solution, it is ensured that one end of the two first bevel gears can rotate normally in the ventilation pipe.

[0023] In the above technical solution, further, both ends of the connecting rod are rotatably connected to the two gear grooves respectively.

[0024] In this technical solution, it is ensured that both ends of the connecting rod can rotate normally in the two gear grooves respectively.

[0025] In the above technical solution, further, the output shaft of the motor is rotationally connected to the second rotating groove.

[0026] In this technical solution, it is ensured that the output shaft of the motor can rotate normally in the second rotation groove.

[0027] In the above technical solution, further, the adjustment component includes:

[0028] The second threaded rod is rotatably connected to the inner wall of the slide groove and is threadedly connected to the two sliders. One end of the second threaded rod is fixedly connected to a rotating rod, and one end of the rotating rod passes through the inner wall of the slide groove and extends to the outside to be rotatably connected to the splint.

[0029] In this technical solution, it is ensured that when the multiple clamping blocks are moved to appropriate positions, the multiple clamping blocks will clamp the other two sides of the filter plate.

[0030] In the above technical solution, further, the two sections of threads on the second threaded rod have opposite rotation directions.

[0031] In this technical solution, it is ensured that when the second threaded rod rotates, the two sliders are affected by the threads of the second threaded rod and move closer to or away from each other along the sliding groove.

[0032] In the above technical solution, further, the two sections of threads on the first bidirectional threaded rod have opposite rotation directions.

[0033] In this technical solution, it is ensured that when the two first bidirectional threaded rods rotate, the two clamping plates will be respectively acted upon by the threads of the two first bidirectional threaded rods to move closer to or farther away from each other.

[0034] The beneficial effects of the utility model are:

[0035] The centrifugal fan for exhaust gas treatment, through the ventilation pipe and the first bidirectional threaded rod, ensures that the two first bidirectional threaded rods can rotate on the inner wall of the ventilation pipe. The driving assembly ensures that the user can drive the two first bidirectional threaded rods to rotate through the driving assembly. The clamping plate ensures that when the two first bidirectional threaded rods rotate, the two clamping plates are respectively acted upon by the threads of the two first bidirectional threaded rods to move closer to or farther away from each other. The limiting groove and the filter plate ensure that the filter plate can be inserted between the two filter plates. When the two clamping plates are moved to the appropriate position, the two clamping plates can respectively clamp the filter plates through the two limiting grooves. The clamping blocks, the sliding groove and the slider ensure that the two sliders can slide in the sliding groove, so that the two sliders can respectively drive the two clamping blocks to slide in the limiting groove. The adjusting assembly ensures that the user can drive the two sliders to move closer to or farther away from each other through the adjusting assembly, so that the two sliders respectively drive the two clamping blocks to move closer to or farther away from each other, so that the two clamping blocks can restrict the other two sides of the filter plate. This solves the problem that the filter plate inside the ventilation pipe of the centrifugal fan may shake during use during use, thereby affecting the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0037] Figure 2 This is one of the schematic diagrams of the internal structure of the ventilation pipe of the utility model;

[0038] Figure 3 It is a schematic diagram of the explosion structure of the area of ​​the utility model;

[0039] Figure 4 This is a schematic diagram of the internal structure of the plywood of the utility model;

[0040] Figure 5This is the second schematic diagram of the internal structure of the ventilation pipe of the utility model;

[0041] Figure 6 This is the third schematic diagram of the internal structure of the ventilation pipe of the present invention.

[0042] The marks in the figure are:

[0043] 1. Centrifugal fan; 2. Ventilation duct; 3. First bidirectional threaded rod; 4. Clamp; 5. Limiting groove; 6. Clamping block; 7. Filter plate; 8. Slide groove; 9. Slider; 10. Gear groove; 11. First bevel gear; 12. Second bevel gear; 13. Through groove; 14. Connecting rod; 15. First rotating groove; 16. Worm gear; 17. Second rotating groove; 18. Motor groove; 19. Motor; 20. Worm; 21. Second threaded rod; 22. Rotating rod. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0045] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0046] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0047] It should be noted that, in the description of this application, the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional terms do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional terms "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0048] It should be noted that, in the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0049] Example 1:

[0050] See also Figure 1 - Figure 6 As shown, this embodiment provides a centrifugal fan for exhaust gas treatment, including a centrifugal fan 1 and a ventilation pipe 2, and further comprising:

[0051] Two first bidirectional threaded rods 3 are rotatably connected to the inner wall of the centrifugal fan 1. Two clamping plates 4 are threadedly connected between the two first bidirectional threaded rods 3. Two limiting grooves 5 are respectively formed on the two clamping blocks 6 that are slidably connected in the limiting grooves 5.

[0052] A driving assembly is located in the ventilation pipe 2 and is used to drive the two first bidirectional threaded rods 3 to rotate;

[0053] The filter plate 7 is inserted between the two limiting grooves 5 and is located between the multiple clamping blocks 6;

[0054] Two chutes 8, the two chutes 8 are respectively opened in the two clamping plates 4 and are respectively connected to the two limit grooves 5. Two sliders 9 are slidably connected in the chutes 8, and one end of the two sliders 9 extends into the limit grooves 5 and is respectively fixed to the two clamping blocks 6;

[0055] Two adjustment components are respectively located in the two clamping plates 4 and are used to respectively adjust the distance between the corresponding two sliders 9.

[0056] Example 2:

[0057] This embodiment provides a centrifugal fan for exhaust gas treatment. In addition to the technical solutions of the above embodiments, it also has the following technical features. The drive assembly includes:

[0058] Two gear grooves 10 are provided in the ventilation pipe 2 and are connected to the inner cavity of the centrifugal fan 1. Two first bevel gears 11 are rotatably connected in the two gear grooves 10, and one end of the two first bevel gears 11 extends into the inner cavity of the ventilation pipe 2 and is respectively fixed to one end of the two first bidirectional threaded rods 3. One side of the two first bevel gears 11 is respectively engaged with two second bevel gears 12, and the two second bevel gears 12 are respectively located in the two gear grooves 10 and are respectively rotatably connected to the two gear grooves 10;

[0059] A through slot 13 is provided in the ventilation pipe 2 and is connected to the two gear slots 10. A connecting rod 14 is rotatably connected in the through slot 13, and both ends of the connecting rod 14 extend into the two gear slots 10 and are fixed to the two second bevel gears 12 respectively.

[0060] A first rotating groove 15 is formed on the inner wall of the through groove 13 , and a worm gear 16 fixed to the connecting rod 14 is rotatably connected in the first rotating groove 15 ;

[0061] A second rotating groove 17 is provided on the inner wall of the first rotating groove 15 , and a worm 20 meshing with the worm wheel 16 is rotatably connected in the second rotating groove 17 ;

[0062] The motor slot 18 is opened on the inner wall of the second rotating slot 17 . A motor 19 is fixedly connected in the motor slot 18 , and the output shaft of the motor 19 extends into the second rotating slot 17 and is fixed to one end of the worm 20 .

[0063] When the two clamping plates 4 move to the appropriate position, the two clamping plates 4 will clamp the filter plate 7 between the two limit grooves 5 through the two limit grooves 5, ensuring that the two clamping plates 4 can clamp one side of the filter plate 7.

[0064] Example 3:

[0065] This embodiment provides a centrifugal fan for waste gas treatment. In addition to the technical solutions of the above embodiments, it also has the following technical features: one end of the two first bevel gears 11 is rotatably connected to the ventilation pipe 2.

[0066] Here, it is ensured that one end of the two first bevel gears 11 can rotate normally in the ventilation pipe 2 .

[0067] Example 4:

[0068] This embodiment provides a centrifugal fan for waste gas treatment. In addition to the technical solutions of the above embodiments, it also has the following technical features: both ends of the connecting rod 14 are rotatably connected to the two gear grooves 10 respectively.

[0069] Here, it is ensured that both ends of the connecting rod 14 can rotate normally in the two gear grooves 10 respectively.

[0070] Example 5:

[0071] This embodiment provides a centrifugal fan for waste gas treatment. In addition to the technical solutions of the above embodiments, it also has the following technical features: the output shaft of the motor 19 is rotatably connected to the second rotating groove 17.

[0072] Here, it is ensured that the output shaft of the motor 19 can rotate normally in the second rotation groove 17 .

[0073] Example 6:

[0074] This embodiment provides a centrifugal fan for exhaust gas treatment. In addition to the technical solutions of the above embodiments, it also has the following technical features. The regulating component includes:

[0075] The second threaded rod 21 is rotatably connected to the inner wall of the slide groove 8 and is threadedly connected to the two sliders 9. One end of the second threaded rod 21 is fixedly connected to the rotating rod 22, and one end of the rotating rod 22 passes through the inner wall of the slide groove 8 and extends to the outside to be rotatably connected to the splint 4.

[0076] When in use, the user manually rotates the two rotating rods 22, allowing the rotating rods 22 to drive the second threaded rod 21 to rotate in the slide groove 8. When the second threaded rod 21 rotates, the two sliders 9 will be affected by the threads of the second threaded rod 21 and approach each other along the slide groove 8, allowing the two sliders 9 to respectively drive the two clamping blocks 6 to approach each other, ensuring that when the multiple clamping blocks 6 move to the appropriate position, the multiple clamping blocks 6 will clamp the other two sides of the filter plate 7.

[0077] Example 7:

[0078] This embodiment provides a centrifugal fan for waste gas treatment. In addition to the technical solutions of the above embodiments, it also has the following technical features: the two sections of threads on the second threaded rod 21 have opposite rotation directions.

[0079] Here, it is ensured that when the second threaded rod 21 rotates, the two sliders 9 are affected by the threads of the second threaded rod 21 and move closer to or away from each other along the sliding groove 8.

[0080] Example 8:

[0081] This embodiment provides a centrifugal fan for waste gas treatment. In addition to the technical solutions of the above embodiments, it also has the following technical features: the two sections of threads on the first bidirectional threaded rod 3 have opposite rotation directions.

[0082] Here, it is ensured that when the two first bidirectional threaded rods 3 rotate, the two clamping plates 4 are respectively acted upon by the threads of the two first bidirectional threaded rods 3 to move closer to or farther away from each other.

[0083] During use, the user places the filter plate 7 at a suitable position between the two limit grooves 5, and then starts the motor 19, so that the output shaft of the motor 19 drives the worm 20 to rotate in the second rotating groove 17, so that the worm 20 drives the worm gear 16 to rotate in the first rotating groove 15, and the worm gear 16 drives the connecting rod 14 to rotate in the through groove 13, so that the two ends of the connecting rod 14 respectively drive the two second bevel gears 12 to rotate in the two gear grooves 10, so that the two second bevel gears 12 respectively drive the two first bevel gears 11 to rotate in the two gear grooves 10, and the two first bevel gears 11 respectively drive the two first bidirectional threaded rods 3 to rotate in the inner cavity of the ventilation pipe 2, so that the two splints 4 are respectively affected by the threads of the two first bidirectional threaded rods 3 and approach each other. When the two splints When the filter plate 7 is moved to the appropriate position, the two clamping plates 4 will respectively clamp the filter plate 7 between the two limiting grooves 5 through the two limiting grooves 5, ensuring that the two clamping plates 4 can clamp one side of the filter plate 7. Then the user manually rotates the two rotating rods 22 to allow the rotating rod 22 to drive the second threaded rod 21 to rotate in the slide groove 8. When the second threaded rod 21 rotates, the two sliders 9 will be affected by the threads of the second threaded rod 21 and move closer to each other along the slide groove 8, allowing the two sliders 9 to respectively drive the two clamping blocks 6 closer to each other. When multiple clamping blocks 6 are moved to the appropriate position, multiple clamping blocks 6 will clamp the other two sides of the filter plate 7, ensuring that filter plates 7 of any size can be stably fixed in the inner cavity of the ventilation pipe 2, preventing the filter plate 7 from shaking when the centrifugal fan 1 is in use.

[0084] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A centrifugal fan for waste gas treatment, comprising a centrifugal fan (1) and a ventilation pipe (2), characterized in that: Also includes: Two first bidirectional threaded rods (3), the two first bidirectional threaded rods (3) are rotatably connected to the inner wall of the centrifugal fan (1), two clamping plates (4) are threadedly connected between the two first bidirectional threaded rods (3), two limiting grooves (5) are respectively provided on the two clamping plates (4), and two clamping blocks (6) are slidably connected in the limiting grooves (5); A driving assembly, the driving assembly being located in the ventilation pipe (2) and being used to drive the two first bidirectional threaded rods (3) to rotate; A filter plate (7), wherein the filter plate (7) is inserted between the two limiting grooves (5), and the filter plate (7) is located between the plurality of clamping blocks (6); Two slide grooves (8), the two slide grooves (8) are respectively opened in the two clamping plates (4) and are respectively connected to the two limit grooves (5); two sliders (9) are slidably connected in the slide grooves (8), and one end of the two sliders (9) extends into the limit groove (5) and is respectively fixed to the two clamping blocks (6); Two adjustment components are respectively located in the two clamping plates (4) and are used to respectively adjust the distance between the corresponding two sliders (9).

2. A centrifugal fan for waste gas treatment according to claim 1, characterized in that: The drive assembly includes: Two gear grooves (10), the two gear grooves (10) are opened in the ventilation pipe (2) and are connected to the inner cavity of the centrifugal fan (1), two first bevel gears (11) are respectively rotatably connected in the two gear grooves (10), and one end of the two first bevel gears (11) extends into the inner cavity of the ventilation pipe (2) and is respectively fixed to one end of two first bidirectional threaded rods (3), one side of the two first bevel gears (11) is respectively meshed with two second bevel gears (12), and the two second bevel gears (12) are respectively located in the two gear grooves (10) and are respectively rotatably connected to the two gear grooves (10); A through groove (13), the through groove (13) is provided in the ventilation pipe (2) and is connected to the two gear grooves (10), a connecting rod (14) is rotatably connected in the through groove (13), and two ends of the connecting rod (14) respectively extend into the two gear grooves (10) and are respectively fixed to the two second bevel gears (12); a first rotating groove (15), the first rotating groove (15) being formed on the inner wall of the through groove (13), wherein a worm gear (16) fixed to the connecting rod (14) is rotatably connected in the first rotating groove (15); a second rotating groove (17), the second rotating groove (17) being formed on an inner wall of the first rotating groove (15), wherein a worm (20) meshing with the worm wheel (16) is rotatably connected in the second rotating groove (17); A motor slot (18) is provided on the inner wall of the second rotating slot (17), a motor (19) is fixedly connected in the motor slot (18), and an output shaft of the motor (19) extends into the second rotating slot (17) and is fixed to one end of the worm (20).

3. A centrifugal fan for waste gas treatment according to claim 2, characterized in that: One end of the two first bevel gears (11) is rotatably connected to the ventilation pipe (2).

4. A centrifugal fan for waste gas treatment according to claim 2, characterized in that: Both ends of the connecting rod (14) are rotatably connected to the two gear grooves (10) respectively.

5. The centrifugal fan for waste gas treatment according to claim 2, characterized in that: The output shaft of the motor (19) is rotationally connected to the second rotation slot (17).

6. A centrifugal fan for waste gas treatment according to claim 1, characterized in that: The adjustment component includes: A second threaded rod (21), the second threaded rod (21) is rotatably connected to the inner wall of the slide groove (8) and is threadably connected to the two sliders (9), one end of the second threaded rod (21) is fixedly connected to a rotating rod (22), and one end of the rotating rod (22) passes through the inner wall of the slide groove (8) and extends to the outside to be rotatably connected to the splint (4).

7. A centrifugal fan for waste gas treatment according to claim 6, characterized in that: The two sections of threads on the second threaded rod (21) have opposite rotation directions.

8. The centrifugal fan for waste gas treatment according to claim 1, characterized in that: The two sections of threads on the first bidirectional threaded rod (3) have opposite rotation directions.

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