Explosion-proof centrifugal fan with quick release structure

Abstract

The application discloses an explosion-proof centrifugal fan with a quick dismounting structure, and belongs to the field of centrifugal fans. The centrifugal fan comprises a fan main body, a mounting portion arranged at an air inlet of the fan main body, and a connecting mechanism for fixing the mounting portion on the fan main body, and a filter screen is arranged on the inner wall of the mounting portion. The connecting mechanism comprises a circular ring fixedly connected to the rear side of the mounting portion and a plurality of protrusions equidistantly arranged on the outer wall of the circular ring along the circumference, and a plurality of sockets for adapting to the protrusions are equidistantly arranged on the opening of the fan main body along the circumferential direction. A butterfly bolt for screwing with the fan main body is slidingly inserted into the through hole of the mounting portion. Without the aid of complex tools, the mounting portion and the fan main body can be quickly dismounted by rotating and screwing the butterfly bolt, the operation steps are simple and convenient, the labor intensity of workers is greatly reduced, meanwhile, the mounting portion can be quickly dismounted to facilitate the maintenance of the impeller inside the fan main body, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of centrifugal fan technology, specifically an explosion-proof centrifugal fan with a quick-release structure. Background Technology

[0002] In flammable and explosive industries such as petrochemicals, coal mining, and metallurgy, explosion-proof centrifugal fans are key ventilation equipment for ensuring environmental safety and continuous production. Their core function is to efficiently transport gases or gas-solid mixtures by combining explosion-proof materials with a specialized motor, relying on the principle of centrifugal force. This fundamentally avoids safety hazards associated with equipment operation in hazardous environments. Therefore, the stability and ease of maintenance of this equipment directly affect production efficiency and operational safety.

[0003] To ensure the cleanliness of the transported gas, existing explosion-proof centrifugal fans are often equipped with filtration mechanisms. Furthermore, to facilitate the cleaning and replacement of filter components, improvements have emerged in the industry regarding the detachable design of the filter structure. For example, Chinese utility model patent CN216788817U discloses a centrifugal fan with a easily detachable outer casing. It achieves rapid installation and positioning of the filter casing by incorporating an installation structure with an annular cavity, rectangular groove, and limiting groove at the centrifugal fan inlet, along with a filter housing, U-shaped component, L-shaped component, and L-shaped rod. The patent claims that the filter housing can be quickly installed and positioned without requiring complete disassembly; simply loosening the bolts allows the filter screen to pop out, thus improving maintenance efficiency.

[0004] However, the existing technical solution still requires external tools to tighten multiple bolts one by one to disassemble the filter housing and centrifugal fan. This not only makes the disassembly process cumbersome and inefficient, but also increases the labor intensity of the operators.

[0005] Therefore, this application provides an explosion-proof centrifugal fan with a quick-release structure to solve the above problems. Utility Model Content

[0006] This application provides an explosion-proof centrifugal fan with a quick-release structure, which aims to solve the problems mentioned in the background art, such as the need to rely on external tools to tighten multiple bolts one by one for disassembling existing filter housings and centrifugal fans, which not only leads to cumbersome disassembly steps and low efficiency, but also increases the labor intensity of operators.

[0007] To achieve the above objectives, this application provides the following technical solution: an explosion-proof centrifugal fan with a quick-release structure, comprising a fan body, a mounting part disposed at the air inlet of the fan body, and a connecting mechanism for fixing the mounting part to the fan body, wherein a filter screen is disposed on the inner wall of the mounting part; to facilitate quick disassembly of the mounting part from the fan body: the connecting mechanism includes a ring fixedly connected to the rear side of the mounting part and a plurality of protrusions evenly spaced along the circumference on the outer wall of the ring, wherein the opening of the fan body is provided with slots evenly spaced along the circumference for fitting the protrusions, and a wing bolt for threaded connection with the fan body is slidably inserted through a through hole on the mounting part. During installation, first insert the ring on the rear side of the mounting part into the opening of the fan body. Rotate the mounting part to align the protrusion with the socket on the fan body. After inserting the protrusion into the socket, rotate the mounting part clockwise to initially limit the misalignment between the protrusion and the socket. Then, pass the wing bolt through the through hole on the mounting part and screw it into the corresponding screw hole on the fan body to complete the fixing of the mounting part. During disassembly, simply unscrew the wing bolt and rotate the mounting part counterclockwise until the protrusion and the socket are realigned. The mounting part can then be directly removed, enabling quick disassembly and impeller maintenance.

[0008] Preferably, to prevent the mounting part from wobbling at the opening of the fan body, the outer wall of the ring is adapted to fit the opening of the fan body. This eliminates the gap between the ring and the opening of the fan body, effectively preventing the mounting part from wobbling at the opening of the fan body, ensuring the stability of the mounting part after installation, and ensuring that the mounting part will not affect the performance of the fan during operation due to wobbling.

[0009] Preferably, there are one number of protrusions, and the number of sockets is the same as the number of protrusions. The one-to-one correspondence between the one number of protrusions and one number of sockets makes the force on the mounting part and the fan body more even, which not only improves the stability of the connection, but also avoids damage caused by excessive force on a single connection point, while ensuring accurate alignment during installation and smooth disassembly without jamming.

[0010] Preferably, the distance between the protrusion and the rear side of the mounting part is consistent with the thickness of the fan body shell. This ensures a tight fit between the mounting part and the fan body, effectively preventing axial movement of the mounting part, further improving the structural stability after installation, and avoiding abnormal noise or compromised sealing performance due to axial movement during fan operation.

[0011] Preferably, the fan body has a threaded hole for matching the thread of the wing bolt. This provides a stable threaded connection base for the wing bolt, ensuring that the wing bolt can be firmly tightened onto the fan body, thereby achieving reliable fixation of the mounting part and preventing the mounting part from falling off due to loosening of the wing bolt during fan operation.

[0012] Preferably, to facilitate limiting the rotational position of the protrusion: a convex ring is fixedly connected to the inner side of the fan body corresponding to its opening position. The convex ring has an arc-shaped groove for fitting the protrusion, and the inlet end of the arc-shaped groove corresponds to the insertion port. This allows for precise limitation of the protrusion's rotation angle and position, preventing excessive rotation or misalignment during installation, ensuring quick and accurate positioning of the mounting part, and improving structural stability after installation, while preventing protrusion displacement during operation.

[0013] Preferably, to facilitate rotation of the mounting part, two handles are fixedly connected to the front side of the mounting part. This provides operators with convenient points of force to rotate the mounting part, allowing them to easily rotate it without the need for additional tools. This makes installation and disassembly operations more labor-saving and efficient, further improving the ease of assembly and disassembly.

[0014] This application does not require complex tools; the installation unit and the main body of the fan can be quickly assembled and disassembled by simply rotating and tightening the wing bolts. The operation steps are simple and convenient, greatly reducing the labor intensity of the operators. At the same time, the installation unit can be quickly disassembled to facilitate the inspection and maintenance of the impeller inside the main body of the fan, thus improving maintenance efficiency.

[0015] This application, through the design of the convex ring and the arc groove, can precisely limit the rotation angle and position of the convex, avoid excessive rotation or misalignment of the convex during installation, ensure the quick and accurate positioning of the installation part, and improve the structural stability after installation, preventing the convex from shifting during operation. Attached Figure Description

[0016] Figure 1 This is a structural diagram of an explosion-proof centrifugal fan with a quick-release structure.

[0017] Figure 2 This is a structural diagram of the air inlet of the main body of the fan.

[0018] Figure 3 Exploded view of the installation section, connection mechanism, fan body, and convex ring;

[0019] Figure 4 A sectional view of the installation section, connection mechanism, fan body, and convex ring connection.

[0020] Figure 5 This is a structural diagram of an explosion-proof centrifugal fan with a quick-release structure.

[0021] Figure 6 This is a schematic diagram of the structure connecting the ring, the mounting part, and the protrusion.

[0022] In the picture:

[0023] 1. Fan body; 2. Mounting part; 21. Handle; 3. Connecting mechanism; 31. Ring; 32. Protrusion; 33. Socket; 34. Wing bolt; 4. Filter screen; 5. Protruding ring; 51. Arc groove. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] This embodiment provides an explosion-proof centrifugal fan with a quick-release structure, such as... Figure 1-6 As shown, the centrifugal fan includes a fan body 1, a mounting part 2 located at the air inlet of the fan body 1, and a connecting mechanism 3 for fixing the mounting part 2 to the fan body 1. A filter screen 4 is provided on the inner wall of the mounting part 2. To facilitate quick and easy removal of the mounting part 2 from the fan body 1, the connecting mechanism 3 includes a ring 31 fixedly connected to the rear side of the mounting part 2 and multiple protrusions 32 evenly spaced along the circumference on the outer wall of the ring 31. The opening of the fan body 1 has slots 33 evenly spaced along the circumference for fitting the protrusions 32. A wing bolt 34 for threaded connection with the fan body 1 is slidably inserted into the mounting part 2 through a through hole. Without the need for complex tools, the mounting part 2 can be quickly removed and installed from the fan body 1 simply by rotating and tightening the wing bolt 34. The operation is simple and convenient, significantly reducing the labor intensity of operators. Simultaneously, the mounting part 2 can be quickly removed to facilitate the inspection and maintenance of the impeller inside the fan body 1, improving maintenance efficiency. During installation, first insert the ring 31 on the rear side of the mounting part 2 into the opening of the fan body 1. Rotate the mounting part 2 to align the protrusion 32 with the socket 33 on the fan body 1. After inserting the protrusion 32 into the socket 33, rotate the mounting part 2 clockwise to make the protrusion 32 and the socket 33 misaligned to achieve initial positioning. Then, pass the wing bolt 34 through the through hole on the mounting part 2 and screw it into the corresponding screw hole on the fan body 1 to complete the fixing of the mounting part 2. During disassembly, simply unscrew the wing bolt 34 and rotate the mounting part 2 counterclockwise until the protrusion 32 and the socket 33 are realigned. Then, the mounting part 2 can be directly removed to achieve quick disassembly and impeller maintenance.

[0026] To prevent the mounting part 2 from wobbling at the opening of the fan body 1, the outer wall of the ring 31 is fitted to the opening of the fan body 1. This eliminates the gap between the ring 31 and the opening of the fan body 1, effectively preventing the mounting part 2 from wobbling at the opening of the fan body 1, ensuring the stability of the mounting part 2 after installation, and ensuring that the mounting part 2 will not affect the performance of the fan during operation due to wobbling. The ring 31 serves as a transition structure connecting the mounting part 2 and the fan body 1. Its outer wall size is precisely matched with the opening size of the fan body 1. When the ring 31 is inserted into the opening of the fan body 1, the outer wall of the ring 31 fits tightly against the inner wall of the opening of the fan body 1, restricting the radial displacement of the mounting part 2 and thus preventing wobbling.

[0027] There are six protrusions 32, and the number of sockets 33 is the same as the number of protrusions 32. The six protrusions 32 and the six sockets 33 are matched one-to-one, so that the force on the mounting part 2 and the fan body 1 is more even. This not only improves the stability of the connection, but also avoids damage caused by excessive force on a single connection point. At the same time, it ensures accurate alignment during installation and smooth disassembly without jamming. Six protrusions 32 are evenly spaced along the outer circumference of the ring 31, and six sockets 33 are opened at the opening of the fan body 1. During installation, each protrusion 32 can be accurately inserted into the corresponding socket 33. After rotation and misalignment, the six protrusions 32 share the fixing force of the mounting part 2, so that the force is evenly distributed and the connection reliability is guaranteed.

[0028] The distance between the protrusion 32 and the rear side of the mounting part 2 is the same as the thickness of the fan body 1. This ensures a tight fit between the mounting part 2 and the fan body 1, effectively preventing axial movement of the mounting part 2, further improving the structural stability after installation, and avoiding abnormal noise or affecting the sealing effect due to axial movement during fan operation. The distance between the protrusion 32 and the rear side of the mounting part 2 is set to be the same as the thickness of the fan body 1. When the protrusion 32 is inserted into the socket 33 and rotated to offset, the fan body 1 is clamped between the protrusion 32 and the rear side of the mounting part 2, forming an axial limit and restricting the axial movement of the mounting part 2.

[0029] The fan body 1 has a threaded hole for matching the thread of the wing bolt 34. This provides a stable threaded connection base for the wing bolt 34, ensuring that the wing bolt 34 can be firmly tightened onto the fan body 1, thereby achieving reliable fixation of the mounting part 2 and preventing the mounting part 2 from falling off due to loosening of the wing bolt 34 during fan operation. The threaded hole on the fan body 1 precisely matches the thread specification of the wing bolt 34. After the mounting part 2 is initially positioned by the misalignment of the protrusion 32 and the socket 33, the wing bolt 34 is passed through the through hole on the mounting part 2 and screwed into the threaded hole. Through the thread engagement, the wing bolt 34 presses the mounting part 2, achieving final fixation of the mounting part 2.

[0030] To facilitate the limitation of the rotation position of the protrusion 32, a protruding ring 5 is fixedly connected to the inner side of the fan body 1 corresponding to its opening position. The protruding ring 5 has an arc-shaped groove 51 for fitting the protrusion 32, with the inlet end of the arc-shaped groove 51 corresponding to the insertion port 33. This allows for precise limitation of the rotation angle and position of the protrusion 32, preventing excessive rotation or misalignment during installation, ensuring quick and accurate positioning of the mounting part 2, and improving structural stability after installation, preventing displacement of the protrusion 32 during operation. The protruding ring 5 is fixedly connected to the inner side of the fan body 1 corresponding to its opening position, and the inlet end of the arc-shaped groove 51 corresponds to the insertion port 33. When the protrusion 32 is inserted into the insertion port 33, rotating the mounting part 2 clockwise causes the protrusion 32 to enter the arc-shaped groove 51 and move along it until the end of the arc-shaped groove 51 blocks further rotation. At this point, the protrusion 32 and the insertion port 33 reach the optimal misalignment limit state, achieving precise limitation of the rotation position.

[0031] To facilitate rotation of the mounting part 2, two handles 21 are fixedly connected to the front side of the mounting part 2. This provides operators with convenient points of force to rotate the mounting part 2, allowing for easy rotation without the need for additional tools. This makes installation and disassembly operations more labor-saving and efficient, further improving ease of assembly and disassembly. The two handles 21 are fixedly connected to the front side of the mounting part 2. During installation or disassembly, operators can directly grasp the two handles 21 to apply rotational force. The force transmission through the handles 21 drives the mounting part 2, the ring 31, and the protrusion 32 to rotate synchronously. Compared to directly gripping the mounting part 2, applying force is more convenient and labor-saving, improving operational efficiency.

[0032] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0033] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. An explosion-proof centrifugal fan with a quick-release structure, comprising a fan body (1), an installation part (2) disposed at the air inlet of the fan body (1), and a connecting mechanism (3) for fixing the installation part (2) on the fan body (1), wherein a filter screen (4) is disposed on the inner wall of the installation part (2); Its features are: The connecting mechanism (3) includes a ring (31) fixedly connected to the rear side of the mounting part (2) and a plurality of protrusions (32) evenly distributed on the outer wall of the ring (31) along the circumference. The opening of the fan body (1) is provided with a socket (33) evenly distributed along the circumference for matching the protrusions (32). The mounting part (2) is slidably inserted with a wing bolt (34) for threaded connection with the fan body (1) through a through hole.

2. The explosion-proof centrifugal fan with a quick-release structure according to claim 1, characterized in that: The outer wall of the ring (31) is adapted to the opening of the fan body (1).

3. The explosion-proof centrifugal fan with a quick-release structure according to claim 1, characterized in that: There are 6 protrusions (32), and the number of sockets (33) is the same as the number of protrusions (32).

4. The explosion-proof centrifugal fan with a quick-release structure according to claim 1, characterized in that: The distance between the protrusion (32) and the rear side of the mounting part (2) is consistent with the shell thickness of the fan body (1).

5. The explosion-proof centrifugal fan with a quick-release structure according to claim 1, characterized in that: The fan body (1) is provided with a threaded hole for matching the thread of the wing bolt (34).

6. The explosion-proof centrifugal fan with a quick-release structure according to claim 1, characterized in that: A protruding ring (5) is fixedly connected to the inner side of the fan body (1) at the opening position. An arc-shaped groove (51) is provided on the protruding ring (5) for matching the protrusion (32). The inlet end of the arc-shaped groove (51) corresponds to the socket (33).

7. The explosion-proof centrifugal fan with a quick-release structure according to claim 1, characterized in that: The front side of the mounting part (2) is fixedly connected to two handles (21).

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