Centrifugal fan volute

Abstract

The utility model relates to the technical field of fan volutes, and discloses a centrifugal fan volute which comprises a volute body, a front shell cover and a rear shell cover, protruding blocks are evenly and fixedly connected to the end faces of the two sides of the volute body at intervals, and limiting blocks are rotationally connected to the end faces of one sides of the protruding blocks. Through holes are evenly formed in the outer side of the front shell cover and the outer side of the rear shell cover at intervals, U-shaped pipes are evenly and fixedly connected to the inner wall of the volute body at intervals, and the multiple U-shaped pipes are filled with sound absorption blocks. According to the volute, the convex blocks at the upper end are matched with the through holes of the front shell cover and the rear shell cover, the shell covers are limited through the limiting blocks, the shell covers are fixed through the iron wires, loosening or falling caused by vibration or external force is effectively prevented, the operation stability of equipment is improved, and quick disassembly can be achieved only by loosening the iron wires and rotating the limiting blocks during disassembly. The maintenance efficiency is obviously improved; and the downtime is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fan casing technology, and in particular to a centrifugal fan casing. Background Technology

[0002] Centrifugal fans are widely used in various industrial fields, such as ventilation, air conditioning, dust removal, and exhaust systems. One of the core components of a centrifugal fan is the volute, which, as the outer shell structure, not only supports and secures the impeller inside the fan but also effectively guides the airflow direction and converts its speed and pressure. The design and manufacturing of the volute have a crucial impact on the fan's performance, efficiency, and stability.

[0003] In existing technologies, the front and rear covers of most centrifugal fan casings are connected to the casing body by multiple bolts. Since each bolt needs to be tightened or loosened individually, this process is relatively cumbersome, especially during regular maintenance or inspections, which often consumes a lot of time and effort, thus increasing workload and downtime.

[0004] Therefore, those skilled in the art have provided a centrifugal fan casing to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a centrifugal fan casing. This casing uses an upper protrusion to engage with the through holes of the front and rear casing covers, and is limited by a limiting block. The casing covers are fixed with wire, effectively preventing loosening or detachment caused by vibration or external force, thus improving the stability of equipment operation. During disassembly, it can be quickly disassembled simply by loosening the wire and rotating the limiting block, significantly improving maintenance efficiency and reducing downtime.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A centrifugal fan casing includes a casing body, a front cover, and a rear cover. Protrusions are fixedly connected at even intervals on both end faces of the casing body. Limiting blocks are rotatably connected to one end face of each of the protrusions. Through holes are evenly spaced on the outer sides of the front cover and the rear cover. U-shaped tubes are fixedly connected at even intervals on the inner wall of the casing body. Sound-absorbing blocks are filled inside each of the U-shaped tubes.

[0008] Through the above technical solution, the volute is engaged with the through holes of the front and rear covers by the upper protrusion and is limited by the limiting block. The cover is fixed by the wire, which effectively prevents the loosening or falling off caused by vibration or external force, and improves the stability of equipment operation. When disassembling, it can be quickly disassembled by simply loosening the wire and rotating the limiting block, which significantly improves maintenance efficiency and reduces downtime.

[0009] Furthermore, all of the aforementioned protrusions extend into the interior of the through hole, and one side of the limiting block at the upper end of the multiple protrusions is in close contact with one side of the front cover and the rear cover.

[0010] Through the above technical solutions, the protrusions and limiting blocks can ensure the precise docking and stable connection of the front cover and the rear cover, effectively avoiding gaps or loosening between components, thereby improving the sealing performance and mechanical strength of the equipment.

[0011] Furthermore, each of the protrusions has a wire running through it, and the two ends of the wire are tied together tightly.

[0012] Through the above technical solution, the iron wire runs through and is tightly bound inside, which can effectively prevent the protrusion from deforming or loosening due to external force, ensuring the durability of the equipment during long-term operation, reducing the probability of failure, and improving the overall reliability of the equipment.

[0013] Furthermore, a sound-absorbing plate is provided on one end face of both the front cover and the rear cover;

[0014] Through the above technical solutions, the sound-absorbing panels can effectively absorb the noise generated during the operation of the fan, reduce the spread of noise, and reduce noise pollution in the surrounding environment.

[0015] Furthermore, a mounting plate is fixedly connected to one end of the volute body, and mounting holes are provided at the four corners of the mounting plate;

[0016] The above technical solution simplifies the installation and fixing process of the equipment, and the design of the mounting holes makes it easy to connect the volute body to other components, ensuring the stability of the equipment.

[0017] Furthermore, all of the aforementioned sound-absorbing blocks are made of polyurethane foam;

[0018] Through the above technical solutions, polyurethane foam has excellent sound absorption properties, which can significantly reduce the noise level during equipment operation, create a quieter working environment, and improve the comfort and applicability of the equipment.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model proposes a centrifugal fan casing. In use, the volute casing has protrusions on both sides of the upper end of the casing body that extend into the through holes of the front and rear casing covers. By rotating the limiting blocks at the upper end of the protrusions, the front and rear casing covers can be tightly limited to the front and rear end faces of the casing body. Then, iron wires are passed through each limiting block in sequence and the two ends of the iron wires are tied tightly, thereby firmly fixing the front and rear casing covers and preventing the casing from loosening or falling off due to vibration or other external forces during the operation of the fan. This can improve the operational stability of the equipment. When disassembling, the front and rear casing covers can be quickly removed from the upper end of the volute casing body simply by loosening and pulling out the iron wires and rotating the limiting blocks. This significantly improves the maintenance efficiency of the equipment and reduces downtime.

[0021] 2. The centrifugal fan casing proposed in this utility model has the following characteristics: When in use, the U-shaped tubes evenly spaced inside the casing body can effectively disperse and guide the airflow, making the airflow more uniform inside the casing, reducing airflow disturbance and irregularity, thereby improving the stability of the airflow. The sound-absorbing blocks filled inside the U-shaped tubes can effectively absorb the noise generated by airflow and mechanical vibration, significantly reducing the sound propagation during equipment operation, while suppressing the echo and resonance phenomena caused by airflow and equipment vibration, thereby maintaining a quiet and stable sound environment inside the equipment. Attached Figure Description

[0022] Figure 1 This is an isometric view of a centrifugal fan casing proposed in this utility model;

[0023] Figure 2 An exploded view of a centrifugal fan casing proposed in this utility model;

[0024] Figure 3 This is a schematic diagram showing the connection between the wire and the limiting block of the centrifugal fan casing proposed in this utility model.

[0025] Figure 4 This is a cross-sectional view of a centrifugal fan casing proposed in this utility model;

[0026] Figure 5 This is a schematic diagram of the internal structure of the limiting block of a centrifugal fan volute proposed in this utility model.

[0027] Legend:

[0028] 1. Volute body; 2. Protrusion; 3. Limiting block; 4. Mounting plate; 5. Mounting hole; 6. Iron wire; 7. U-shaped tube; 8. Sound-absorbing block; 9. Front cover; 10. Rear cover; 11. Through hole; 12. Sound-absorbing plate. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Reference Figure 1-5 The present invention provides a specific embodiment of a centrifugal fan casing, comprising a casing body 1, a front cover 9 and a rear cover 10. Protrusions 2 are fixedly connected at even intervals on both end faces of the casing body 1. Limiting blocks 3 are rotatably connected to one end face of each of the multiple protrusions 2. Through holes 11 are evenly spaced on the outer sides of the front cover 9 and the rear cover 10. U-shaped tubes 7 are fixedly connected at even intervals on the inner wall of the casing body 1. Sound-absorbing blocks 8 are filled inside the multiple U-shaped tubes 7.

[0031] The volute is engaged with the through holes 11 of the front cover 9 and the rear cover 10 by the upper protrusion 2 and is limited by the limiting block 3. The cover is fixed by the wire 6, which effectively prevents the cover from loosening or falling off due to vibration or external force, and improves the stability of equipment operation. When disassembling, it can be quickly disassembled by simply loosening the wire 6 and rotating the limiting block 3, which significantly improves maintenance efficiency and reduces downtime.

[0032] Multiple protrusions 2 extend into the interior of the through hole 11, and one end face of the limiting block 3 at the upper end of the multiple protrusions 2 is tightly fitted with one end face of the front cover 9 and the rear cover 10. The protrusions 2 and the limiting block 3 can ensure the precise docking and stable connection of the front cover 9 and the rear cover 10, effectively avoiding gaps or loosening between components, thereby improving the sealing performance and mechanical strength of the equipment. A wire 6 is threaded through the interior of each of the multiple protrusions 2, and the two ends of the wire 6 are tightly tied together. The wire 6, threaded through and tightly tied, can effectively prevent the protrusions 2 from deforming or loosening due to external forces, ensuring the durability of the equipment during long-term operation, reducing the probability of failure, and improving the overall reliability of the equipment. The front cover 9 and A sound-absorbing panel 12 is provided on one side of the rear cover 10. The sound-absorbing panel 12 can effectively absorb the noise generated during the operation of the fan, reduce the transmission of noise, and reduce noise pollution in the surrounding environment. A mounting plate 4 is fixedly connected to one end of the volute body 1. Mounting holes 5 are provided at the four corners of the mounting plate 4. The mounting plate 4 simplifies the installation and fixing process of the equipment. Through the design of the mounting holes 5, the volute body 1 can be easily connected to other components to ensure the stability of the equipment. Multiple sound-absorbing blocks 8 are made of polyurethane foam. Polyurethane foam has excellent sound absorption performance, which can significantly reduce the noise level during the operation of the equipment, create a quieter working environment, and improve the comfort and applicability of the equipment.

[0033] Working principle: During use, the protrusions 2 on both sides of the upper end of the volute body 1 extend into the through holes 11 of the front cover 9 and the rear cover 10. By rotating the limiting block 3 at the upper end of the protrusion 2, the front cover 9 and the rear cover 10 can be tightly limited to the front and rear end faces of the volute body 1. Then, the wire 6 passes through each limiting block 3 in sequence and the two ends of the wire 6 are tied tightly, thereby firmly fixing the front cover 9 and the rear cover 10, preventing the housing from loosening or falling off due to vibration or other external forces during the operation of the fan, and improving the operational stability of the equipment. At the same time, the U-shaped tubes 7 evenly spaced inside the volute body 1 can effectively disperse and guide the airflow, making the airflow more uniform inside the volute, reducing airflow disturbance and irregularity, thereby improving the stability of the airflow. In addition, the sound-absorbing block 8 filled inside the U-shaped tube 7 can effectively absorb the noise generated by the airflow and mechanical vibration, significantly reducing the sound transmission during the operation of the equipment, and suppressing the echo and resonance phenomena caused by airflow and equipment vibration, maintaining a quiet and stable sound environment inside the equipment.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centrifugal fan casing, comprising a casing body (1), a front casing cover (9), and a rear casing cover (10), characterized in that: The two end faces of the volute body (1) are uniformly and fixedly connected with protrusions (2), and one end face of each of the protrusions (2) is rotatably connected with a limiting block (3). The outer sides of the front cover (9) and the rear cover (10) are uniformly and fixedly provided with through holes (11). The inner wall of the volute body (1) is uniformly and fixedly connected with U-shaped tubes (7), and the interior of each of the U-shaped tubes (7) is filled with sound-absorbing blocks (8).

2. The centrifugal fan casing according to claim 1, characterized in that: Multiple protrusions (2) extend into the interior of the through hole (11), and one side of the limiting block (3) at the upper end of the multiple protrusions (2) is in close contact with one side of the front cover (9) and the rear cover (10).

3. The centrifugal fan casing according to claim 1, characterized in that: Each of the protrusions (2) has a wire (6) running through its interior, and the two ends of the wire (6) are tied together.

4. The centrifugal fan casing according to claim 1, characterized in that: The front cover (9) and the rear cover (10) are each provided with a sound-absorbing plate (12) on one side end face.

5. A centrifugal fan casing according to claim 1, characterized in that: One end of the volute body (1) is fixedly connected to an installation plate (4), and installation holes (5) are provided at the four corners of the installation plate (4).

6. A centrifugal fan casing according to claim 1, characterized in that: All of the aforementioned sound-absorbing blocks (8) are made of polyurethane foam.

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