A protective cage net for a centrifugal fan

Abstract

The utility model relates to fan protection technical field discloses a protective cover net for centrifugal fan, including vortex air duct, the right side fixed connection of vortex air duct has wind wheel air duct, the inside right side fixed connection of wind wheel air duct has motor, the left side fixed connection of motor has wind wheel, the inside right side fixed connection of wind wheel air duct has a plurality of fixed plate, the left side fixed connection of a plurality of fixed plate all has two fixed blocks no.

Description

Technical Field

[0001] This utility model relates to the field of fan protection technology, and in particular to a protective cover for centrifugal fans. Background Technology

[0002] In order to protect the centrifugal fan blades and external rotor motor structure inside the fan blade duct of the fresh air unit, a protective cover is added between the vortex duct and the fan blade duct. However, after long-term use, a lot of impurities will accumulate on the protective cover, which will affect the air volume and increase the operating noise of the centrifugal fan due to the turbulence generated.

[0003] A search revealed Chinese Patent Publication No. CN213331724U, which discloses a safety protective cover for a fire-fighting fan. The cover includes a first protective cover and a second protective cover. The first protective cover is mounted on the rear outer wall of the second protective cover. The inner wall of the second protective cover has mounting holes. The first and second protective covers are stably connected and assembled onto the fire-fighting fan through the combined action of overlapping blocks and fastening nuts. This protective cover is then installed on the fire-fighting fan to protect it. When the fan is in operation, the safety cover employs a double-layer protective design, and... The mesh diameter of the protective net is much smaller than the gap between two adjacent protective rings, which allows the protective rings to block and protect larger objects from entering the fan and causing blockage and damage. The protective net can filter and protect smaller objects to ensure the safe and stable operation of the fire-fighting fan. However, in actual use, because the protective cover adopts a double-layer protective design, the two protective cover bodies are installed by the joint of overlapping blocks and fastening nuts. However, disassembly and cleaning also require the removal of screws and nuts, which is slow and reduces its working efficiency. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a protective cover for centrifugal fans, aiming to improve the problem that the existing technology still requires disassembly of screws and nuts during disassembly and cleaning, which is slow and reduces its working efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a protective cover for a centrifugal fan, comprising a vortex duct, a fan wheel duct fixedly connected to the right side of the vortex duct, a motor fixedly connected to the right side inside the fan wheel duct, a fan wheel fixedly connected to the left side of the motor, multiple fixing plates fixedly connected to the right side inside the fan wheel duct, two fixing blocks fixedly connected to the left side of each of the multiple fixing plates, a circular hole provided between adjacent fixing blocks, a spring fixedly connected between adjacent fixing blocks, a limit post fixedly connected between adjacent springs, a clamping plate fixedly connected to the opposite side of the two limit posts, the same connecting block provided to the right side of each of the two limit posts, the same mesh cover fixedly connected between adjacent connecting blocks, and an installation mechanism provided at the front side of the fan wheel duct.

[0006] The above technical solution utilizes a vortex duct as an air inlet to draw in air and guide it into the impeller duct. Inside the impeller duct, a motor is fixed on the right side. When the motor operates, it converts electrical energy into mechanical energy through its connection with the impeller on the left, driving the impeller to rotate at high speed. The rotation of the impeller generates strong suction, causing air to flow within the duct. Inside the right side of the impeller duct, multiple fixed plates provide support and fixation. A fixing structure consisting of a round hole, a spring, and a limiting post is provided between the fixing blocks on the left side of the fixed plates. When installing the mesh cover, the connecting block is aligned with the clamping plate and pressure is applied. The clamping plate compresses the spring, and the limiting post moves outward within the round hole, allowing the connecting block to pass through. Afterward, the spring returns to its elasticity, and the clamping plate and the limiting post move inward, locking the connecting block. When the equipment vibrates during operation, the limiting post presses tightly against the connecting block to prevent the mesh cover from falling off due to vibration, maintaining the stable operation of the duct system and ensuring continuous and smooth airflow within the duct.

[0007] As a further description of the above technical solution: The installation mechanism includes multiple clips, which are fixedly connected to each other on the front and rear sides of the impeller duct. Two locking blocks are fixedly connected to the front and rear sides of the vortex duct. Fixing blocks are fixedly connected to the front and rear sides of the bottom of the impeller duct. Connecting blocks are fixedly connected to the front and rear sides of the bottom of the vortex duct. Bolts are threaded to the left side of the two connecting blocks. The right ends of the two bolts penetrate the connecting blocks and are threaded to the fixing blocks. Nuts are threaded to the right ends of the two bolts.

[0008] The above technical solution involves aligning the vortex duct with the impeller duct, where the clip immediately engages the locking block for initial positioning. A bolt is then screwed in from the left side of connecting block two. As the bolt rotates, its right end passes through the connecting block and connects with the threaded fixing block at the bottom of the impeller duct, ensuring a stable connection between the two ducts. Finally, a nut is screwed onto the right end of the bolt to enhance stability, thus ensuring the stability of the duct device during operation.

[0009] As a further description of the above technical solution: The right side of the wind turbine duct is threaded with multiple screws, all of which are arranged at equal intervals.

[0010] The above technical solution involves fixing multiple equally spaced screws on the right side of the wind turbine duct with threaded connections. This serves to stabilize the motor's position and ensure that it does not shift during operation.

[0011] As a further description of the above technical solution: A connecting plate is fixedly connected to the rear end of the top right side of the wind turbine duct, and a groove is provided on the front side of the connecting plate.

[0012] The above technical solution involves a connecting plate located at the top rear end of the right side of the wind turbine duct. The groove on the front side of the connecting plate can be used for wires, providing an orderly channel for the wiring layout and avoiding messy wiring.

[0013] As a further description of the above technical solution: A guide rod is fixedly connected to the bottom inner side of the wind turbine duct, and a guide hole is fixedly connected to the bottom inner side of the wind turbine duct.

[0014] The above technical solution involves fixing guide rods and guide holes at the bottom inner side of the wind turbine duct, which provides accurate installation positions for components during installation, ensuring the precision and stability of the entire duct system installation.

[0015] As a further description of the above technical solution: The bottom left side of the wind turbine duct is provided with a sliding groove, and the right side of the wind turbine duct is designed with a chamfer.

[0016] The above technical solution involves a groove on the bottom left side of the wind turbine duct, into which the bottom of the vortex duct can be inserted precisely, providing accurate positioning and stable support. The right side of the wind turbine duct features a chamfered design, which can effectively prevent injury to personnel.

[0017] As a further description of the above technical solution: The right sides of the plurality of fixing plates are equidistantly fixed to the inside right side of the wind turbine duct, and the right sides of the plurality of fixing blocks are equidistantly fixed to the left side of the fixing plates.

[0018] The above technical solution involves fixing multiple fixed plates at equal intervals on the right side inside the wind turbine duct, while multiple fixed blocks are fixed at equal intervals on the left side of the fixed plates.

[0019] As a further description of the above technical solution: The diameters of the multiple springs are all greater than the diameter of the circular hole, and the diameters of the multiple clamping plates are all smaller than the diameter of the circular hole.

[0020] The above technical solution involves multiple springs with diameters larger than the circular hole to ensure that the springs do not sink into the hole and affect their elastic function, and multiple clamping plates with diameters smaller than the circular hole to ensure that they can move flexibly within the circular hole and meet the corresponding mechanical operation requirements.

[0021] This utility model has the following beneficial effects: 1. In this utility model, when installing the mesh cover, first align the connecting block of the mesh cover with the clamping plate and press it firmly. The clamping plate compresses the spring, and the limiting post connected to it slides outward in the round hole, allowing the connecting block to pass smoothly. After the connecting block is in place, the spring returns to its elasticity, driving the clamping plate and the limiting post to move inward, locking the connecting block. The limiting post will abut against the connecting block to prevent the mesh cover from falling off, thereby realizing the ability to quickly install and disassemble the mesh cover for cleaning and replacement, improving work efficiency.

[0022] 2. In this utility model, the vortex air duct is aligned with the wind turbine air duct, and the buckle immediately locks the buckle block for initial positioning. The bolt is taken and screwed in from the left side of the connecting block two. The bolt rotates, and the right end passes through the connecting block and connects with the threaded fixing block at the bottom of the wind turbine air duct, so that the two air ducts are firmly connected. Finally, the nut is screwed on the right end of the bolt to enhance stability, thereby ensuring the stability of the air duct device during operation. Attached Figure Description

[0023] Figure 1 This is a perspective view of a protective cover for a centrifugal fan proposed in this utility model; Figure 2 This is a right view of a protective cover for a centrifugal fan proposed in this utility model; Figure 3 This is a front view of a protective cover for a centrifugal fan proposed in this utility model; Figure 4 This is a schematic diagram of the structure of a protective cover for a centrifugal fan proposed in this utility model; Figure 5 This is a schematic diagram of the structure of a spring for a protective cover mesh for a centrifugal fan, as proposed in this utility model.

[0024] Legend: 1. Vortex air duct; 2. Installation mechanism; 201. Buckle; 202. Locking block; 203. Fixing block two; 204. Connecting block two; 205. Bolt; 206. Nut; 3. Fan wheel air duct; 4. Motor; 5. Fan wheel; 6. Fixing plate; 7. Fixing block one; 8. Round hole; 9. Spring; 10. Limiting post; 11. Locking plate; 12. Connecting block one; 13. Mesh cover; 14. Screw; 15. Connecting plate; 16. Groove; 17. Guide rod; 18. Guide hole; 19. Slide groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0026] Reference Figure 1 , Figure 4 and Figure 5 This utility model provides an embodiment of a protective cover for a centrifugal fan, comprising a vortex duct 1 for air intake, a fan wheel duct 3 fixedly connected to the right side of the vortex duct 1, a motor 4 fixedly connected to the right side of the inside of the fan wheel duct 3, and a fan wheel 5 fixedly connected to the left side of the motor 4, the motor 4 driving the fan wheel 5 to rotate. In this embodiment, the motor 4 can be an external rotor motor, comprising a rotor magnetic ring and a stator. The rotor magnetic ring is fixedly connected in a ring shape to the inner wall of one side of the fan wheel 5, while the stator is movably connected to the inner wall of the rotor magnetic ring via a magnetic levitation air gap, with the air gap between the two being 0.2-2mm. Furthermore, in this embodiment, the internal iron core of the stator can be a twelve-slot ten-pole or twelve-slot fourteen-pole structure.

[0027] In addition, multiple fixing plates 6 are fixedly connected to the right side of the wind turbine duct 3. Two fixing blocks 7 are fixedly connected to the left side of each fixing plate 6. A circular hole 8 is provided between adjacent fixing blocks 7. A spring 9 is fixedly connected between adjacent fixing blocks 7. A limit post 10 is fixedly connected between adjacent springs 9. A clamping plate 11 is fixedly connected to the opposite side of each limit post 10. The clamping plate 11 compresses the spring 9, causing the limit post 10 to move within the circular hole 8. A connecting block 12 is provided on the right side of each limit post 10. The multiple connecting blocks 12 are connected between adjacent... All are fixedly connected to the same mesh cover 13, with a zinc layer on the surface, which has good anti-rust ability, can resist a certain amount of dust corrosion, and is not easy to become rough due to rust, reducing the adhesion points of dust. When installing the mesh cover 13, the connecting block 12 is pressed against the clamping plate 11, so that the clamping plate 11 compresses the spring 9, and the limiting post 10 will move outward in the round hole 8. When the connecting block 12 enters, the spring 9 returns to its elasticity, and the clamping plate 11 moves inward with the limiting post 10. The limiting post 10 plays a role in preventing the mesh cover 13 from falling out accidentally during vibration. The front side of the wind turbine duct 3 is provided with an installation mechanism 2. Specifically, the vortex duct 1 serves as the air inlet, and its right side is firmly connected to the impeller duct 3. Inside the impeller duct 3, on the right side, the motor 4 is fixed, and the impeller 5 is connected to the left side of the motor 4. When the motor 4 starts running, it can drive the impeller 5 to rotate together. Inside the impeller duct 3, on the right side, there are also multiple fixing plates 6. Each fixing plate 6 has two fixing blocks 7 installed on its left side. A circular hole 8 is opened between these two fixing blocks 7, and a spring 9 is connected between them. Between the two springs 9, a limit post 10 is fixed. The left and right sides of the limit post 10 are respectively connected to clamping plates 11. When an external force is applied to the clamping plate 11, the clamping plate 11 will squeeze the spring 9, thereby allowing the limit post 10 to move flexibly within the circular hole 8. The mesh cover 13 has a zinc layer on its surface, which has good protection. The galvanized steel mesh has good corrosion resistance, resists dust erosion, and is not prone to surface roughness due to rust, reducing dust adhesion points. The galvanized steel mesh has high strength, and sound waves will be reflected and refracted when propagating on its surface, consuming some sound energy and thus playing a certain role in noise reduction. When installing the mesh 13, multiple connecting blocks 12 need to be aligned with the clamping plate 11 and pressure is applied. The clamping plate 11 is squeezed, which forces the spring 9 to compress. The limiting post 10 then moves outward in the round hole 8. When the connecting block 12 successfully passes the clamping plate 11 and enters the designated position, the spring 9 returns to its elasticity, driving the clamping plate 11 and the limiting post 10 to move inward. When the equipment vibrates during operation, the limiting post 10 can effectively prevent the mesh 13 from accidentally falling off due to vibration, thus ensuring the stable operation of the entire air duct system.

[0028] Reference Figure 1 , Figure 2 and Figure 3 The installation mechanism 2 includes multiple clips 201, which are fixedly connected to each other on the front and rear sides of the impeller duct 3. Two clips 202 are fixedly connected to the front and rear sides of the vortex duct 1. Fixing blocks 203 are fixedly connected to the front and rear sides of the bottom of the impeller duct 3. When the vortex duct 1 is installed facing the impeller duct 3, the clips 201 will lock the clips 202. Connecting blocks 204 are fixedly connected to the front and rear sides of the bottom of the vortex duct 1. Bolts 205 are threaded to the left side of the two connecting blocks 204. The right ends of the two bolts 205 pass through the connecting blocks 204 and are threaded to the fixing blocks 203. The connecting blocks 204 and the fixing blocks 203 are connected together by the bolts 205. The vortex duct 1 and the impeller duct 3 are also connected together. Nuts 206 are threaded to the right ends of the two bolts 205 to increase their stability. Specifically, the front and rear sides of the impeller duct 3 are fixed with clips 201, and the front and rear sides of the vortex duct 1 each have two clips 202. The front and rear sides of the bottom of the impeller duct 3 are each equipped with a fixing block 203. During installation, the vortex duct 1 is accurately aligned with the impeller duct 3, and the clips 201 on the impeller duct 3 will quickly lock the clips 202 on the vortex duct 1 to achieve initial positioning. The bottom of the vortex duct 1 has a connecting block 204 on the front and rear sides. After initial positioning, two bolts 205 are taken and screwed into the connecting block 204 from the left side, so that the right end of the bolt 205 passes through the connecting block 204 and is then threaded to the fixing block 203 at the bottom of the impeller duct 3. Through the bolts 205, the connecting block 204 and the fixing block 203 are tightly connected, thereby making the vortex duct 1 and the impeller duct 3 firmly connected. Nuts 206 are screwed on the right ends of the two bolts 205 respectively to further enhance the stability of the connection and ensure the reliable operation of the duct system.

[0029] Reference Figure 1 , Figure 2 and Figure 4 The right side of the wind turbine duct 3 is threaded with multiple screws 14, which are arranged at equal intervals to fix the position of the motor 4. The top rear end of the right side of the wind turbine duct 3 is fixedly connected with a connecting plate 15. The front side of the connecting plate 15 has a groove 16 for wires. The bottom inner side of the wind turbine duct 3 is fixedly connected with a guide rod 17 and a guide hole 18, which provides an accurate installation position during installation. Specifically, multiple equally spaced screws 14 are fixed on the right side of the wind turbine duct 3 by threaded connection. Their function is to stabilize the position of the motor 4 and ensure that the motor 4 will not shift during operation. A connecting plate 15 is provided at the top rear end of the right side of the wind turbine duct 3. The groove 16 on the front side of the connecting plate 15 can be used for wires, providing an orderly channel for the wiring and avoiding messy wiring. At the bottom inner side of the wind turbine duct 3, a guide rod 17 and a guide hole 18 are fixed, which can provide accurate installation position for the components during installation, ensuring the accuracy and stability of the entire duct system installation.

[0030] Reference Figure 4 and Figure 5 A groove 19 is provided at the bottom left side of the wind turbine duct 3, and the bottom of the vortex duct 1 can be inserted into the groove 19. The right side of the wind turbine duct 3 is designed with a chamfer to prevent injury to personnel. The right sides of multiple fixing plates 6 are fixedly connected to the inside right side of the wind turbine duct 3 at equal intervals. The right sides of multiple fixing blocks 7 are fixedly connected to the left side of the fixing plate 6 at equal intervals. The diameter of multiple springs 9 is larger than the diameter of the round hole 8, and the diameter of multiple clamping plates 11 is smaller than the diameter of the round hole 8. Specifically, a groove 19 is provided at the bottom left side of the wind turbine duct 3, into which the bottom of the vortex duct 1 can be inserted precisely, providing accurate positioning and stable support. The right side of the wind turbine duct 3 adopts a chamfer design, which can effectively prevent injury to personnel. Inside the right side of the wind turbine duct 3, multiple fixing plates 6 are fixed at equal intervals, while multiple fixing blocks 7 are fixed at equal intervals on the left side of the fixing plates 6. The diameter of multiple springs 9 is larger than that of the round hole 8, ensuring that the springs 9 will not fall into the hole and affect the elastic function. The diameter of multiple clamping plates 11 is smaller than that of the round hole 8, ensuring that they can move flexibly within the round hole 8 to meet the corresponding mechanical operation requirements.

[0031] Working principle: The vortex duct 1 serves as the air inlet, drawing in air and guiding it to the impeller duct 3. Inside the impeller duct 3, the motor 4 is fixed on the right side. When the motor 4 operates, it converts electrical energy into mechanical energy through its connection with the impeller 5 on the left, driving the impeller 5 to rotate at high speed. The rotation of the impeller 5 generates a strong suction force, causing air to flow within the duct. Inside the right side of the impeller duct 3, multiple fixing plates 6 provide support and fixation. The fixing plates 6 on the left side are connected to fixing blocks 7, which consist of a round hole 8, a spring 9, and a limiting post 10. When installing the mesh cover 13, the connecting block 12 is aligned with the clamping plate 11 and pressure is applied. The clamping plate 11 compresses the spring 9, and the limiting post 10 moves outward in the round hole 8, allowing the connecting block 12 to pass through. Afterward, the spring 9 returns to its elasticity, and the clamping plate 11 and the limiting post 10 move inward to lock the connecting block 12. When the equipment vibrates during operation, the limiting post 10 presses tightly against the connecting block 12 to prevent the mesh cover 13 from falling off due to vibration, thus maintaining the stable operation of the air duct system and ensuring that air flows continuously and smoothly in the air duct. Furthermore, during installation, the vortex duct 1 should first be aligned with the impeller duct 3. The clip 201 on the impeller duct 3 will engage the clip 202 on the vortex duct 1, achieving initial positioning of the two ducts. Connecting blocks 204 are located on the front and rear sides of the bottom of the vortex duct 1. After initial positioning, take two bolts 205 and screw them in from the left side of the connecting block 204. As the bolts 205 rotate, their right ends gradually penetrate the connecting block 204 and are then threadedly connected to the fixing block 203 at the bottom of the impeller duct 3. Through the tightening action of the bolts 205, the connecting block 204 and the fixing block 203 are tightly connected, thus making the vortex duct 1 and the impeller duct 3 firmly joined together. To further enhance the stability of the connection, nuts 206 are screwed onto the right ends of the two bolts 205 respectively, thereby ensuring that the entire duct system is reliable and stable during operation and will not loosen or separate due to external forces or other factors.

[0032] 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 embodiments, those skilled in the art can still modify the technical solutions described in the foregoing 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 protective cover for a centrifugal fan, comprising a vortex duct (1), characterized in that: The right side of the vortex duct (1) is fixedly connected to the impeller duct (3), the right side of the inside of the impeller duct (3) is fixedly connected to the motor (4), the left side of the motor (4) is fixedly connected to the impeller (5), the right side of the inside of the impeller duct (3) is fixedly connected to multiple fixing plates (6), the left side of each of the multiple fixing plates (6) is fixedly connected to two fixing blocks (7), the two fixing blocks (7) are provided with round holes (8) between each adjacent one, the two fixing blocks (7) are fixedly connected to each adjacent one, the two springs (9) are fixedly connected to each adjacent one, the two springs (9) are fixedly connected to each adjacent one, the two limiting posts (10) are fixedly connected to each other on the opposite side of the two limiting posts (10), the same connecting block (12) is provided on the right side of each of the two limiting posts (10), the same mesh cover (13) is fixedly connected between each adjacent one of the multiple connecting blocks (12), and the front side of the impeller duct (3) is provided with an installation mechanism (2).

2. The protective cover for a centrifugal fan according to claim 1, characterized in that: The installation mechanism (2) includes multiple buckles (201). The multiple buckles (201) are fixedly connected to the front and rear sides of the wind turbine duct (3). Two clips (202) are fixedly connected to the front and rear sides of the vortex duct (1). Fixing blocks (203) are fixedly connected to the front and rear sides of the bottom of the wind turbine duct (3). Connecting blocks (204) are fixedly connected to the front and rear sides of the bottom of the vortex duct (1). Bolts (205) are threaded to the left side of the two connecting blocks (204). The right ends of the two bolts (205) penetrate the connecting blocks (204) and are threaded to the fixing blocks (203). Nuts (206) are threaded to the right ends of the two bolts (205).

3. The protective cover for a centrifugal fan according to claim 1, characterized in that: The right side of the wind turbine duct (3) is threaded with multiple screws (14), and the multiple screws (14) are arranged at equal intervals.

4. A protective cover for a centrifugal fan according to claim 1, characterized in that: A connecting plate (15) is fixedly connected to the rear end of the right top of the wind turbine duct (3), and a groove (16) is provided on the front side of the connecting plate (15).

5. A protective cover for a centrifugal fan according to claim 1, characterized in that: A guide rod (17) is fixedly connected to the bottom inner side of the wind turbine duct (3), and a guide hole (18) is fixedly connected to the bottom inner side of the wind turbine duct (3).

6. A protective cover for a centrifugal fan according to claim 1, characterized in that: The bottom left side of the wind turbine duct (3) is provided with a groove (19), and the right side of the wind turbine duct (3) is designed with a chamfer.

7. A protective cover for a centrifugal fan according to claim 1, characterized in that: The right sides of the plurality of fixed plates (6) are fixedly connected at equal intervals to the inside right side of the wind turbine duct (3), and the right sides of the plurality of fixed blocks (7) are fixedly connected at equal intervals to the left side of the fixed plates (6).

8. A protective cover for a centrifugal fan according to claim 1, characterized in that: The diameter of each of the multiple springs (9) is greater than the diameter of the circular hole (8), and the diameter of each of the multiple clamping plates (11) is smaller than the diameter of the circular hole (8).

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