Medium-high pressure centrifugal fan

Abstract

This utility model relates to the field of fan technology, specifically a medium- and high-pressure centrifugal fan. It includes a housing, and further comprises: an air outlet cover located at the upper end of the housing and coaxially arranged with it; a first quick-release assembly disposed between the air outlet cover and the housing; an air inlet shroud located at the lower end of the housing and coaxially arranged with it; a second quick-release assembly disposed between the air inlet shroud and the housing; and a fan body detachably connected to the housing. By incorporating the first and second quick-release assemblies, this utility model allows technicians to quickly disassemble and install components without needing to find screwdrivers or other tools during equipment maintenance. This significantly shortens maintenance time, greatly improves repair efficiency, and truly solves the pain point of inconvenient maintenance associated with traditional fixing methods, bringing great convenience to the daily use and maintenance of medium- and high-pressure centrifugal fans.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically to medium and high pressure centrifugal fans. Background Technology

[0002] Medium and high pressure centrifugal fans are core ventilation equipment in the industrial field and are widely used in industries such as chemical, metallurgy, and power. Their structure mainly consists of an impeller, casing, air inlet, air outlet, shaft, and transmission components. The high-speed rotation of the impeller generates centrifugal force to drive the airflow, while the casing guides the airflow to achieve efficient delivery.

[0003] In the prior art, patent CN222436630U discloses a DC fan. This fan effectively increases the air pressure and air volume by adopting an innovative design in which the outer shell, air outlet cover and air inlet cover are arranged coaxially, providing a new idea for improving fan performance.

[0004] However, in the above solutions, both the air outlet cover and the air inlet cover are fixed to the outer casing with screws. This fixing method makes it impossible to quickly disassemble and assemble the components. Each maintenance and repair requires the use of screwdrivers and other tools, consuming a significant amount of time and effort. This severely impacts work efficiency when facing urgent troubleshooting or routine maintenance needs, causing numerous inconveniences for actual use and equipment maintenance. Therefore, we propose a medium-high pressure centrifugal fan to effectively solve the above-mentioned drawbacks. Utility Model Content

[0005] The purpose of this utility model is to provide a medium- and high-pressure centrifugal fan to solve the problem mentioned in the background art that the air outlet cover and air inlet cover are fixed to the outer shell with screws, making it impossible to quickly disassemble and assemble.

[0006] This utility model is achieved through the following technical solution: a medium-high pressure centrifugal fan, including a housing, and further comprising:

[0007] An air outlet cover, which is located at the upper end of the outer casing and is coaxially arranged with the outer casing;

[0008] The first quick-release component is disposed between the air outlet cover and the outer casing, and is used to connect and fix the air outlet cover and the outer casing to each other.

[0009] An air inlet hood is located at the lower end of the outer casing and is coaxially arranged with the outer casing;

[0010] The second quick-release assembly is disposed between the air inlet cover and the outer shell, and is used to connect and fix the air inlet cover and the outer shell to each other.

[0011] The fan body is detachably connected to the housing.

[0012] Optionally, an annular mounting base is fixed inside the housing, and the fan body is placed on top of the annular mounting base; a fixing bracket is fixed to the upper end of the fan body by screws, and the two ends of the fixing bracket are fixed to the side wall of the housing by screws.

[0013] The fan body is detachably connected to the outer casing through the cooperation of an annular mounting base and a fixed bracket.

[0014] Optionally, an air outlet duct communicating with the outer shell is fixed to the top of the air outlet cover. The diameter of the air outlet duct is smaller than the diameter of the air outlet cover, and a check valve is installed inside the air outlet duct.

[0015] Optionally, the air inlet shroud has several air inlets, and inside the air inlet shroud, a first filter screen, filter cotton, and a second filter screen are sequentially laid along its own axial direction.

[0016] Optionally, the first quick-release assembly includes a first thread disposed on the upper end of the housing, and a second thread disposed on the air outlet cover that is helically engaged with the first thread; the structure of the second quick-release assembly is the same as that of the first quick-release assembly.

[0017] Optionally, the first quick-release assembly includes several fasteners fixed to the outer wall of the air vent cover, and a movable latch body that mates with each fastener is fixed to the outer wall of the housing; the structure of the second quick-release assembly is the same as that of the first quick-release assembly.

[0018] Optionally, each fastener is equally spaced along the circumference of the air outlet cover, and the second quick-release assembly is symmetrically arranged above and below the first quick-release assembly.

[0019] Compared with the prior art, this utility model provides a medium- and high-pressure centrifugal fan, which has the following beneficial effects:

[0020] This invention, by setting up a first quick-release component and a second quick-release component, allows technicians to quickly disassemble and install components during equipment maintenance without having to find additional tools such as screwdrivers. This significantly shortens maintenance time, greatly improves maintenance efficiency, and truly solves the pain point of inconvenient maintenance in traditional fixing methods, bringing great convenience to the daily use and maintenance of medium and high pressure centrifugal fans. Attached Figure Description

[0021] Figure 1 This is an assembly diagram of Example 1;

[0022] Figure 2 This is a partial cross-sectional view of Example 1;

[0023] Figure 3 This is a cross-sectional view of Embodiment 1;

[0024] Figure 4 This is an exploded view of Example 1;

[0025] Figure 5 This is an assembly diagram of Example 2;

[0026] Figure 6 This is a partial cross-sectional view of Example 2;

[0027] Figure 7 This is a cross-sectional view of Example 2;

[0028] Figure 8 This is an exploded view of Example 2.

[0029] In the diagram: 1. Outer shell; 2. Air outlet cover; 3. First quick-release assembly; 301. First thread; 302. Second thread; 303. Fastener; 304. Movable buckle body; 4. Air inlet cover; 5. Second quick-release assembly; 6. Fan body; 7. Annular mounting base; 8. Fixed bracket; 9. Air outlet duct; 10. Check valve; 11. Air inlet; 12. First filter screen; 13. Filter cotton; 14. Second filter screen. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1: Please refer to Figures 1 to 4 The medium- and high-pressure centrifugal fan includes a casing 1, which is cylindrical and open at both the top and bottom to provide installation space for other components.

[0032] This embodiment also includes: an air outlet cover 2, a first quick-release assembly 3, an air inlet cover 4, a second quick-release assembly 5, and a fan body 6, which are used to solve the problem that in the prior art, both the air outlet cover and the air inlet cover are fixed to the outer shell with screws, making it impossible to quickly disassemble and assemble them.

[0033] Specifically, the air outlet cover 2 is located at the upper end of the outer casing 1 and is coaxially arranged with the outer casing 1, allowing air to flow in a straight line, thereby reducing wind resistance during the flow. In this embodiment, an air outlet duct 9 communicating with the outer casing 1 is fixed to the top of the air outlet cover 2. The air outlet duct 9 is also coaxially arranged with the outer casing 1 to reduce wind resistance. The diameter of the air outlet duct 9 is smaller than the diameter of the air outlet cover 2, which can enhance the air pressure at the outlet; and, the outer surface of the air outlet duct 9 is provided with threads, which facilitates the installation of the fan onto other external equipment. A check valve 10 is installed inside the air outlet duct 9. When the fan body 6 is working, the check valve 10 opens, allowing air to flow normally. When the fan body 6 is not working, the check valve 10 automatically closes to prevent external debris from entering the outer casing 1.

[0034] A drain hole is located around the check valve 10 on the exhaust duct 9. When the fan is in a humid environment or is conveying gas containing moisture, it can promptly drain the water condensed inside the exhaust duct 9, effectively preventing liquid accumulation and avoiding the check valve 10 from failing due to liquid immersion. This ensures that the check valve 10 can function normally in one direction, thereby protecting the core components inside the fan and improving the overall reliability and safety of the equipment. At the same time, it can also effectively prevent external liquids from entering the fan, preventing damage to critical components such as the motor and impeller due to liquid intrusion, and comprehensively improving the fan's protection capabilities and operational stability in complex environments.

[0035] In addition, the air inlet shroud 4 is located at the lower end of the outer casing 1 and is coaxially arranged with the outer casing 1 to allow air to flow in a straight line. It should be added that the air inlet shroud 4 has several air inlets 11 penetrating through it, allowing air to enter the outer casing 1 normally. Inside the air inlet shroud 4, a first filter screen 12, filter cotton 13, and a second filter screen 14 are sequentially laid along its own axial direction. This multi-layer filtration structure can effectively filter most impurities in the air, reducing equipment failures and losses caused by dust and impurities entering, and ensuring the stable and efficient operation of the medium- and high-pressure centrifugal fan.

[0036] In this embodiment, the fan body 6 is detachably connected to the housing 1 to drive airflow. Specifically, an annular mounting base 7 is fixed inside the housing 1, and the fan body 6 is placed on top of the annular mounting base 7 without affecting the normal airflow. A fixing bracket 8 is fixed to the upper end of the fan body 6 with screws, and both ends of the fixing bracket 8 are fixed to the side wall of the housing 1 with screws. The fan body 6 is detachably connected to the housing 1 through the cooperation of the annular mounting base 7 and the fixing bracket 8. Under normal conditions, the fan body 6 is clamped and fixed between the annular mounting base 7 and the fixing bracket 8. When maintenance of the fan body 6 is required, first remove the screws between the fixing bracket 8 and the housing 1, and then remove the screws between the fixing bracket 8 and the fan body 6 to remove the fan body 6 from the housing 1.

[0037] The following is an introduction to quick-release components:

[0038] The first quick-release assembly 3 is disposed between the air outlet cover 2 and the outer casing 1, for connecting and fixing the air outlet cover 2 and the outer casing 1 together. The second quick-release assembly 5 is disposed between the air inlet cover 4 and the outer casing 1, for connecting and fixing the air inlet cover 4 and the outer casing 1 together.

[0039] In this embodiment, the first quick-release component 3 includes a first thread 301 disposed on the upper end of the outer casing 1, and a second thread 302 disposed on the air outlet cover 2 that screws into the first thread 301. The air outlet cover 2 is connected and fixed to the outer casing 1 through the engagement of the first thread 301 and the second thread 302. The structure of the second quick-release component 5 is the same as that of the first quick-release component 3, ensuring the uniformity and efficiency of the technical solution.

[0040] With the above design, when maintenance is required inside the medium and high pressure centrifugal fan, the operator can easily unscrew the air outlet cover 2 and the air inlet cover 4 by hand, without the need for additional tools such as screwdrivers. This greatly simplifies the maintenance process and significantly improves the convenience and efficiency of equipment maintenance.

[0041] Example 2: Please refer to Figures 5 to 8 This embodiment also proposes a medium-high pressure centrifugal fan. The difference between this embodiment and Embodiment 1 is that:

[0042] The first quick-release assembly 3 includes several fasteners 303 fixed to the outer wall of the air outlet cover 2, and movable latch bodies 304 fixed to the outer wall of the outer casing 1, which cooperate with each fastener 303. When the movable latch body 304 is engaged with the fastener 303, the air outlet cover 2 and the outer casing 1 are firmly locked together, thus achieving the functions of connection and locking. The second quick-release assembly 5 has the same structure as the first quick-release assembly 3 and is used to achieve a quick connection between the air inlet cover 4 and the outer casing 1. Through simple fastening and opening actions, the assembly and disassembly of the components can be completed in a few seconds, greatly shortening maintenance time.

[0043] In this embodiment, each fastener 303 is evenly spaced along the circumference of the air outlet cover 2. This design ensures that the fasteners exert a uniform pulling force on the air outlet cover 2 when fastened, preventing excessive local stress that could lead to sealing failure or component deformation. It also ensures force balance between the air outlet cover 2 and the outer casing 1, effectively improving the stability and reliability of the overall connection. The second quick-release assembly 5 is symmetrically arranged above and below the first quick-release assembly 3. This not only achieves aesthetic appeal and harmony in the structure, but more importantly, this symmetrical layout allows the fan to maintain better mechanical balance during operation, reducing vibration and noise caused by uneven component connections.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Medium-high pressure centrifugal fan comprising a casing (1), characterized in that, Also includes: Air outlet cover (2), the air outlet cover (2) is located at the upper end of the outer shell (1) and is coaxially arranged with the outer shell (1); The first quick-release component (3) is disposed between the air outlet cover (2) and the outer shell (1) to connect and fix the air outlet cover (2) and the outer shell (1) to each other; Air inlet hood (4), the air inlet hood (4) is located at the lower end of the outer shell (1) and is coaxially arranged with the outer shell (1); The second quick-release assembly (5) is disposed between the air inlet cover (4) and the outer shell (1) to connect and fix the air inlet cover (4) and the outer shell (1) to each other; The fan body (6) is detachably connected to the outer casing (1); The first quick-release assembly (3) includes a first thread (301) disposed on the upper end of the outer shell (1), and a second thread (302) disposed on the air outlet cover (2) that is screwed into the first thread (301); the structure of the second quick-release assembly (5) is the same as that of the first quick-release assembly (3).

2. The medium- and high-pressure centrifugal fan according to claim 1, characterized in that: An annular mounting base (7) is fixed inside the outer shell (1), and the fan body (6) is placed on the top of the annular mounting base (7); a fixing bracket (8) is fixed to the upper end of the fan body (6) by screws, and the two ends of the fixing bracket (8) are fixed to the side wall of the outer shell (1) by screws. The fan body (6) is detachably connected to the outer casing (1) through the cooperation of the annular mounting base (7) and the fixed bracket (8).

3. The mid-high pressure centrifugal fan of claim 1, wherein: The top of the air outlet cover (2) is fixed with an air outlet duct (9) that communicates with the outer shell (1). The diameter of the air outlet duct (9) is smaller than the diameter of the air outlet cover (2). A check valve (10) is installed inside the air outlet duct (9).

4. The mid-high pressure centrifugal fan of claim 1, wherein: The air inlet hood (4) has several air inlets (11) running through it. Inside the air inlet hood (4), a first filter screen (12), filter cotton (13), and a second filter screen (14) are sequentially laid along its own axis.

5. The mid-high pressure centrifugal fan of claim 1, wherein: The first quick-release assembly (3) includes several fasteners (303) fixed on the outer wall of the air outlet cover (2), and movable buckle bodies (304) that cooperate with each fastener (303) are fixed on the outer wall of the outer shell (1); the structure of the second quick-release assembly (5) is the same as that of the first quick-release assembly (3).

6. The mid-high pressure centrifugal fan of claim 5, wherein: Each fastener (303) is equally spaced along the circumference of the air outlet cover (2), and the second quick-release assembly (5) and the first quick-release assembly (3) are symmetrically arranged vertically.

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