Variable frequency fan protective screen convenient to install

Abstract

The utility model discloses a kind of variable frequency fan protective mesh enclosure of easy installation, it is related to fan protection installation technical field, including fan shell and bottom plate.The variable frequency fan protective mesh enclosure of easy installation inserts the positioning tube of first frame edge along the embedding groove of mesh enclosure shell outer surface, positioning tube outer diameter and embedding groove aperture are adapted and the both adhere to sliding, can accurately guide positioning tube into arc slot, ensure that installation path is accurate and does not deviate;When positioning tube slides to the spring of first frame outer surface sliding groove along arc slot and reaches the position of clamping groove, the elastic force of spring pushes the push piece, makes the clamping block connected with the outside of push piece, automatically clamps into clamping groove, realizes the firm connection of first frame and mesh enclosure shell;Conversely, the spring is compressed by pushing the push piece, makes clamping block separate from clamping groove, positioning tube can be inserted into embedding groove along arc slot reverse sliding, both ensure the accuracy and firmness of protective mesh enclosure installation, and also realize quick and convenient disassembly maintenance, improve installation efficiency, it is convenient for later disassembly maintenance.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine protection installation technology, specifically a variable frequency wind turbine protective net cover that is easy to install. Background Technology

[0002] Variable frequency fans are widely used in industrial production, ventilation and air exchange and other fields. In order to ensure their safe operation, prevent foreign objects from entering the fan and damaging the parts, and avoid personnel from contacting the rotating parts inside the fan and causing safety accidents, it is usually necessary to install a protective net at the fan outlet.

[0003] However, existing variable frequency fan protective covers still have some problems: For example, a corrosion-resistant fan protective mesh cover with application number CN202421898729.0 relates to the field of fan mesh cover technology. It includes a mounting plate, a mounting cylinder connected to the top of the mounting plate, an air outlet at the top of the mounting cylinder, a mesh cover bracket at the air outlet, mounting openings of different lengths and widths on both sides of the mounting cylinder and the mesh cover bracket, a fixing component at the mounting opening, the fixing component including a knob, a connecting rod connected to one side of the knob, a clamping block connected to one side of the connecting rod, a mesh cover connected inside the mesh cover bracket, and a corrosion-resistant layer provided on the mounting plate, the mounting cylinder, the mesh cover bracket and the outer wall of the mesh cover. Existing variable frequency fan protective net covers mostly use traditional installation methods such as bolt connections. Installation and disassembly require tools, which is not only cumbersome and time-consuming, but also causes great inconvenience to staff when the net covers need to be cleaned or maintained regularly, thus reducing efficiency. Therefore, we propose a variable frequency fan protective cover that is easy to install in order to solve the problems mentioned above. Utility Model Content

[0004] The purpose of this utility model is to provide a convenient installation of a variable frequency fan protective net cover, in order to solve the problem mentioned in the background art that variable frequency fan protective net covers mostly adopt traditional installation methods such as bolt connection, which require tools for installation and disassembly, are not only cumbersome and time-consuming, but also cause great inconvenience to workers and reduce efficiency when the net cover needs to be cleaned or maintained regularly.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a variable frequency fan protective mesh cover that is easy to install, comprising a fan housing and a base plate. The base plate is attached to the upper part of the fan housing. A mesh cover housing is integrally formed on the upper end surface of the base plate. An embedding groove is formed on the outer surface of the mesh cover housing. An arc-shaped groove communicating with the embedding groove is formed on the inner wall of the mesh cover housing. A slot is formed on the inner side of the arc-shaped groove. A first frame is embedded in the middle of the mesh cover housing. A first protective mesh is inlaid in the middle of the first frame. A positioning tube is welded to the outer edge of the first frame. A sliding groove is formed on the outer surface of the first frame. A spring is fixed to the inner wall of the sliding groove. A lever is fixed to the end of the spring. A locking block that matches the slot is fixed to the outer side of the lever.

[0006] By adopting the above technical solution, a slot is set on the inner wall of the mesh cover shell, and a spring-paddle-block structure is designed on the first frame. During installation, the first frame is embedded into the mesh cover shell, and the spring force pushes the block into the slot, achieving quick positioning and fixation. During disassembly, the paddle is moved to compress the spring, causing the block to disengage from the slot, thus separating the mesh cover assembly. This structure allows for the installation and disassembly of the protective mesh cover without tools, significantly improving maintenance efficiency. At the same time, the precise cooperation between the slot and the block ensures a stable connection of the protective mesh, effectively preventing foreign objects from entering the variable frequency fan and ensuring the safe operation of the equipment.

[0007] Preferably, the outer diameter of the positioning tube is adapted to the aperture of the embedding groove, and the positioning tube and the arc-shaped groove are in a close sliding connection.

[0008] The above technical solution, with its matching design between the outer diameter of the positioning tube and the diameter of the embedded groove, allows it to be accurately inserted into the embedded groove and slide along the arc-shaped groove. The physical size matching enables the guidance and limitation of the installation path, ensuring that the first frame does not shift during installation and improving assembly accuracy. At the same time, the sliding guide block of the arc-shaped groove is aligned with the slot, simplifying the installation operation and enhancing structural stability.

[0009] Preferably, the card block penetrates the middle of the positioning tube, and the card block and the positioning tube are in a close sliding connection, and the card block and the card slot are in an engaging connection.

[0010] Using the above technical solution, the locking block penetrates the middle of the positioning tube and slides against it, allowing the locking block to move axially along the positioning tube under the drive of the spring. At the same time, mechanical interlocking is achieved by matching the shape of the locking block and the slot. During installation, the locking block is automatically locked into the slot by the spring force to fix the position of the protective net. During disassembly, the sliding locking block disengages from the slot to achieve quick unlocking, taking into account both structural stability and ease of operation.

[0011] Preferably, a fixing ring is fixed to the inner wall of the mesh cover shell, and a second frame is attached to the upper end face of the fixing ring. A second protective mesh is embedded in the middle of the second frame, and the aperture of the first protective mesh is larger than that of the second protective mesh.

[0012] By adopting the above technical solution, the second frame is axially limited by the fixing ring, and a graded filtration structure is formed by combining the difference in pore size between the first and second protective nets. The large-pore net intercepts large particles of foreign matter, while the small-pore net blocks fine impurities. The double-layer protective nets work together to improve the ability to prevent foreign matter from intruding. At the same time, the layered design reduces wind resistance and extends the maintenance cycle, ensuring the efficient and stable operation of the variable frequency fan.

[0013] Preferably, the outer surface of the fixing ring is provided with a buckle groove, the bottom of the second frame is fixed with an elastic buckle, and the two sides of the elastic buckle are inverted conical structures, and the elastic buckle and the buckle groove are correspondingly engaged.

[0014] The above technical solution utilizes the inverted conical structure design of the elastic buckle, which allows it to undergo elastic deformation under pressure to smoothly embed into the buckle groove. After embedding, the elastic recovery force of the material achieves a tight engagement with the buckle groove, forming a mechanical interlock. The installation and removal of the second frame can be completed quickly without tools. At the same time, the inverted conical structure enhances the buckle's anti-detachment ability, ensuring that the second protective net is stably connected in the environment of fan vibration and improving the reliability of protection.

[0015] Preferably, the four corners of the fan housing are fixed with positioning pins, and the outer surface of the positioning pins is threaded. The four corners of the mesh cover housing are respectively provided with positioning holes, and the outer surface of the positioning pins is fitted with fastening nuts.

[0016] By adopting the above technical solution, the threaded positioning pins at the four corners of the fan housing are precisely inserted into the positioning holes at the four corners of the mesh cover housing. Then, the engagement of the fastening nut and the threaded structure generates axial clamping force, achieving a rigid connection between the mesh cover and the fan, ensuring installation accuracy and preventing the mesh cover from shifting. The combination of the threaded structure and the nut provides reliable locking, effectively resisting loosening caused by fan vibration and ensuring the long-term stable operation of the protective mesh cover.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. During installation, insert the positioning tube on the edge of the first frame along the embedded groove on the outer surface of the mesh cover. Because the outer diameter of the positioning tube matches the diameter of the embedded groove and the two slide in close contact, the positioning tube can be accurately guided into the arc groove, ensuring that the installation path is accurate and does not deviate. Rotate the first frame clockwise. When the positioning tube slides along the arc groove to the slot position, the elastic force of the spring in the groove on the outer surface of the first frame pushes the lever, so that the locking block connected to the outside of the lever passes through the middle of the positioning tube and slides in close contact, automatically locking into the slot, realizing a stable connection between the first frame and the mesh cover. During disassembly, move the lever to compress the spring, so that the locking block disengages from the slot, and the positioning tube can slide out of the embedded groove along the arc groove in the opposite direction. This not only ensures the accuracy and stability of the protective mesh cover installation, but also realizes quick and convenient disassembly and maintenance, improves installation efficiency, facilitates later maintenance, installation and disassembly, and improves convenience. 2. During installation, align the elastic buckle at the bottom of the second frame with the buckle groove on the outer surface of the fixing ring on the inner wall of the mesh cover and press it down. Because the elastic buckle has an inverted conical structure on both sides, during the pressing process, the inverted conical slope will guide the elastic buckle to undergo elastic deformation and retract inward, allowing it to smoothly enter the buckle groove. When the elastic buckle is fully embedded in the buckle groove, its own elastic restoring force will cause the elastic buckle to return to its original position, forming a tight engagement with the buckle groove, thereby achieving a stable assembly of the second frame and the fixing ring. At this time, the second protective net and the first protective net form a double-layer protective structure, and the aperture of the first protective net is larger than that of the second protective net, which can filter foreign objects of different sizes in stages. Large particles are intercepted by the first protective net, and small particles are blocked by the second protective net, effectively improving the protective effect. When disassembling, simply pull the second frame upward with force, and the elastic buckle of the inverted conical structure will deform again under the action of external force and come out of the buckle groove, making it convenient to clean or replace the second protective net. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of this utility model from the front view; Figure 2 This is a schematic diagram of the installation structure of the double-layer protective net of this utility model; Figure 3 This is a schematic diagram of the installation structure of the mesh cover shell and the fan shell of this utility model; Figure 4 This is a schematic diagram of the installation structure of the first protective net and the outer shell of the net cover according to this utility model; Figure 5 This is a schematic diagram of the installation structure of the second protective net and the fixing ring of this utility model.

[0019] In the diagram: 1. Fan housing; 2. Base plate; 3. Mesh cover housing; 4. Embedded groove; 5. Arc groove; 6. Slot; 7. First frame; 8. First protective mesh; 9. Positioning tube; 10. Slide groove; 11. Spring; 12. Paddle; 13. Locking block; 14. Fixing ring; 15. Second frame; 16. Second protective mesh; 17. Buckle groove; 18. Elastic buckle; 19. Positioning pin; 20. Positioning hole; 21. Fastening nut. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1-5 This utility model provides a technical solution: a variable frequency fan protective mesh cover that is easy to install, including a fan housing 1 and a base plate 2. The base plate 2 is attached to the upper part of the fan housing 1. A mesh cover housing 3 is integrally formed on the upper end surface of the base plate 2. An embedding groove 4 is formed on the outer surface of the mesh cover housing 3. An arc-shaped groove 5 communicating with the embedding groove 4 is formed on the inner wall of the mesh cover housing 3. A slot 6 is formed on the inner side of the arc-shaped groove 5. A first frame 7 is embedded in the middle of the mesh cover housing 3. A first protective mesh 8 is inlaid in the middle of the first frame 7. A positioning tube 9 is welded at the outer edge of the first frame 7. A sliding groove 10 is formed on the outer surface of the first frame 7. A spring 11 is fixed to the inner wall of the sliding groove 10. A lever 12 is fixed to the end of the spring 11. A locking block 13 that matches the slot 6 is fixed to the outer side of the lever 12. The outer diameter of the positioning tube 9 matches the diameter of the embedding groove 4, and the positioning tube 9 and the arc-shaped groove 5 are in a close sliding connection. The locking block 13 penetrates the middle of the positioning tube 9, and the locking block 13 is in a sliding fit with the positioning tube 9, and the locking block 13 is in a locking fit with the slot 6.

[0022] During installation, the positioning tube 9 at the edge of the first frame 7 is inserted into the groove 4 on the outer surface of the mesh cover 3. Because the outer diameter of the positioning tube 9 matches the diameter of the groove 4 and the two slide together, the positioning tube 9 can be accurately guided into the arc groove 5, ensuring that the installation path is accurate and does not deviate. Rotate the first frame 7 clockwise. When the positioning tube 9 slides along the arc groove 5 to the slot 6, the spring 11 in the sliding groove 10 on the outer surface of the first frame 7 pushes the lever 12, so that the locking block 13 connected to the outside of the lever 12 passes through the middle of the positioning tube 9 and slides together, automatically locking into the slot 6, realizing a stable connection between the first frame 7 and the mesh cover 3. During disassembly, the lever 12 is moved to compress the spring 11, so that the locking block 13 is disengaged from the slot 6, and the positioning tube 9 can slide out of the groove 4 along the arc groove 5 in the opposite direction. This not only ensures the accuracy and stability of the protective mesh cover installation, but also realizes quick and convenient disassembly and maintenance, improves installation efficiency, facilitates later maintenance, installation and disassembly, and improves convenience.

[0023] A fixing ring 14 is fixed to the inner wall of the mesh cover shell 3. A second frame 15 is attached to the upper end of the fixing ring 14. A second protective mesh 16 is embedded in the middle of the second frame 15, and the aperture of the first protective mesh 8 is larger than the aperture of the second protective mesh 16. A buckle groove 17 is provided on the outer surface of the fixing ring 14. An elastic buckle 18 is fixed to the bottom of the second frame 15. The elastic buckle 18 has an inverted conical structure on both sides, and the elastic buckle 18 is correspondingly engaged with the buckle groove 17.

[0024] During installation, align the elastic buckle 18 at the bottom of the second frame 15 with the groove 17 on the outer surface of the fixing ring 14 on the inner wall of the mesh cover 3 and press it down. Because the elastic buckle 18 has an inverted conical structure on both sides, during the pressing process, the inverted conical slope will guide the elastic buckle 18 to undergo elastic deformation and retract inward, allowing it to smoothly enter the groove 17. When the elastic buckle 18 is fully embedded in the groove 17, its own elastic restoring force will cause the elastic buckle 18 to return to its original position, forming a tight engagement with the groove 17, thereby realizing the connection between the second frame 15 and the fixing ring. With the secure assembly of 14, the second protective net 16 and the first protective net 8 form a double-layer protective structure. The aperture of the first protective net 8 is larger than that of the second protective net 16, which can filter foreign objects of different sizes in stages. Large particles are intercepted by the first protective net 8, while small particles are blocked by the second protective net 16, effectively improving the protective effect. When disassembling, simply pull the second frame 15 upwards with force, and the elastic buckle 18 of the inverted cone structure will deform again under the action of external force and come out of the buckle groove 17, making it convenient to clean or replace the second protective net 16.

[0025] The four corners of the fan housing 1 are fixed with positioning pins 19, and the outer surface of the positioning pins 19 is threaded. The four corners of the mesh cover housing 3 are respectively provided with positioning holes 20, and the outer surface of the positioning pins 19 is fitted with fastening nuts 21.

[0026] During installation, align the positioning holes 20 at the four corners of the mesh cover 3 with the threaded positioning pins 19 at the four corners of the fan housing 1 and slowly press down to ensure the positioning pins 19 are precisely inserted into the positioning holes 20. This process, through the cooperation of the positioning pins 19 and the positioning holes 20, achieves the initial positioning and precise alignment of the mesh cover 3 and the fan housing 1, preventing installation misalignment. Subsequently, screw the fastening nut 21 onto the thread of the positioning pin 19. As the fastening nut 21 rotates and moves downward, it generates a tight axial clamping force with the surface of the mesh cover 3, firmly fixing the mesh cover 3 to the fan housing 1. The self-locking characteristic of the threaded connection effectively resists the vibration generated during fan operation, preventing the mesh cover 3 from loosening and falling off, ensuring the long-term stable protective function of the protective mesh cover. At the same time, the installation and disassembly process can be completed simply by rotating the fastening nut 21, making the operation simple and quick.

[0027] Working principle: For this type of easy-to-install variable frequency fan protective mesh cover, during installation, first align the positioning holes 20 at the four corners of the mesh cover shell 3 with the threaded positioning pins 19 at the four corners of the fan shell 1 and press them down to achieve initial positioning; then tighten the fastening nut 21 to generate axial clamping force to fix the mesh cover shell 3; then insert the positioning tube 9 of the first frame 7 along the embedded groove 4, and when it is rotated to the end of the arc groove 5, the spring 11 pushes the lever 12 to make the locking block 13 lock into the locking groove 6; finally, press the elastic buckle 18 of the second frame 15 into the buckle groove 17 of the fixing ring 14, and use the elastic deformation of the inverted cone structure to achieve locking; through the precise guidance of the positioning pin 19 and the positioning hole 20, the self-locking fixation of the threaded structure, the elastic locking of the spring 11 buckle, and the deformation assembly of the inverted cone buckle, the multi-level positioning and stable connection of the protective mesh cover are achieved.

[0028] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0029] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A variable frequency fan guard cover for easy installation, comprising a fan housing (1) and a base plate (2), characterized in that: A base plate (2) is attached to the top of the fan housing (1). A mesh cover housing (3) is integrally provided on the upper end surface of the base plate (2). An embedding groove (4) is provided on the outer surface of the mesh cover housing (3). An arc groove (5) communicating with the embedding groove (4) is provided on the inner wall of the mesh cover housing (3). A slot (6) is provided on the inner side of the arc groove (5). A first frame (7) is embedded in the middle of the mesh cover housing (3). A first protective net (8) is inlaid in the middle of the first frame (7). A positioning tube (9) is welded at the outer edge of the first frame (7). A sliding groove (10) is provided on the outer surface of the first frame (7). A spring (11) is fixed on the inner wall of the sliding groove (10). A lever (12) is fixed at the end of the spring (11). A locking block (13) that matches the slot (6) is fixed on the outer side of the lever (12).

2. The variable frequency fan protective cover that is easy to install according to claim 1, characterized in that: The outer diameter of the positioning tube (9) is adapted to the aperture of the embedded groove (4), and the positioning tube (9) and the arc groove (5) are in a sliding fit connection.

3. The variable frequency fan protective cover that is easy to install according to claim 1, characterized in that: The card block (13) penetrates the middle of the positioning tube (9), and the card block (13) and the positioning tube (9) are in a sliding fit connection, and the card block (13) and the card slot (6) are in a snap-fit ​​connection.

4. The variable frequency fan protective cover that is easy to install according to claim 1, characterized in that: The inner wall of the mesh cover (3) is fixed with a fixing ring (14), and the upper end face of the fixing ring (14) is attached to a second frame (15). The middle part of the second frame (15) is inlaid with a second protective net (16), and the aperture of the first protective net (8) is larger than the aperture of the second protective net (16).

5. A variable frequency fan protective cover that is easy to install according to claim 4, characterized in that: The outer surface of the fixing ring (14) is provided with a buckle groove (17), and the bottom of the second frame (15) is fixed with an elastic buckle (18). The two sides of the elastic buckle (18) are inverted conical structures, and the elastic buckle (18) and the buckle groove (17) are correspondingly engaged.

6. A variable frequency fan protective cover that is easy to install according to claim 1, characterized in that: The fan housing (1) has four corners fixed with positioning pins (19), and the outer surface of the positioning pins (19) is threaded. The four corners of the mesh cover housing (3) are provided with positioning holes (20), and the outer surface of the positioning pins (19) is fitted with fastening nuts (21).

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