Rain and bird prevention structure of venue roof exhaust fan

Abstract

The utility model belongs to building ventilation equipment protection technical field, the utility model discloses a kind of stadium roof exhaust fan rainproof bird-proof structure, including rack, further including fixedly set fan cover, bottom plate one and bottom plate two on rack, the bottom plate one is located bottom plate two upside, the fan cover is located bottom plate one upside, this structure integrates multiple principles and realizes multifunctional protection, motor-driven slider dynamic impact protective net is combined with static isolation, actively drives bird and long-acting protection, reduce maintenance cost, by the aid of motor forward and reverse rotation and worm gear, ratchet and pawl transmission, linkage switching exhaust bird and roof cleaning function, reduce energy consumption and cost, rely on rainproof board and protective net double protection, block rainwater and foreign matter, improve equipment bad weather operating stability.

Description

Technical Field

[0001] This utility model belongs to the field of building ventilation equipment protection technology, and in particular relates to a rainproof and bird-proof structure for a stadium roof exhaust fan. Background Technology

[0002] In the operation of large public venues such as stadiums and convention centers, roof exhaust fans are the core equipment for ensuring indoor air circulation and maintaining environmental comfort. They are exposed to the outdoor environment for a long time and need to deal with problems such as rain intrusion, bird nesting disturbance, and roof debris accumulation. Rainwater infiltration may cause short circuits and damage to the internal motor of the fan. Bird nesting inside the fan can block the ventilation channel and cause equipment failure. Meanwhile, the accumulation of dust, fallen leaves and other debris on the roof will affect the heat dissipation efficiency of the exhaust fan and the cleanliness of the venue's appearance. Therefore, a rainproof and bird-proof structure for venue roof exhaust fans that combines rainproof and bird-proof functions and can assist in cleaning is needed to solve the above problems.

[0003] The following issues need to be addressed in the existing technology: (1) The bird-proof effect is limited and the function is simple. Most of the existing exhaust fans use static protective nets for passive bird protection and lack an active bird-repelling mechanism. Birds are easily adapted to static structures. After long-term use, birds will stay, build nests, or even peck at the protective nets. The bird-proof effect gradually decreases. Moreover, most bird-proof structures only have a single blocking function and cannot work in conjunction with the exhaust function of the exhaust fan. Additional bird-repelling equipment is required, which increases the equipment investment cost. (2) Roof cleaning is difficult and inefficient. The existing roof cleaning methods are mainly manual cleaning, which is labor-intensive and has high safety risks. The cleaning cycle is long and cannot deal with the accumulation of debris after severe weather in a timely manner. A few automated cleaning devices need to be equipped with separate power sources and control modules, which are not only costly and occupy a large installation space, but also lack coordination with exhaust fans, resulting in complex transmission structures and low cleaning efficiency. Utility Model Content

[0004] In response to the above situation and to overcome the shortcomings of existing technologies, this utility model provides a rainproof and bird-proof structure for a stadium roof exhaust fan. This structure integrates multiple principles to achieve multi-functional protection. The dynamic impact of the motor-driven slider against the protective net, combined with static isolation, actively repels birds and provides long-term protection, reducing maintenance costs. By using the forward and reverse rotation of the motor and the transmission of worm gears, ratchet wheels, and pawls, the exhaust, bird-repelling, and roof cleaning functions can be switched in a coordinated manner, reducing energy consumption and costs. Relying on the dual protection of the rainproof plate and the protective net, it blocks rainwater and foreign objects, improving the stability of the equipment in severe weather.

[0005] The technical solution adopted by this utility model is as follows: A rainproof and bird-proof structure for a stadium roof exhaust fan includes a frame, and also includes a fan cover, a base plate one, and a base plate two fixedly installed on the frame. The base plate one is located on the upper side of the base plate two, and the fan cover is located on the upper side of the base plate one. A protective net is fixedly installed on the inner wall of the fan cover. The protective net has a dual function: first, it statically isolates birds, leaves, and other foreign objects from entering the fan; second, it generates vibration through dynamic impact to actively drive away birds and ensure unobstructed ventilation channels. A support plate is fixedly installed on the inner wall of the frame, and a motor is fixedly installed on the upper wall of the support plate. A worm gear one is coaxially fixedly connected to one end of the motor. The worm gear one is the core of the motor power transmission. When rotating in the forward direction, it drives the fan blades to draw in air and the rotating plate to rotate. When rotating in the reverse direction, it drives the worm wheel one and the ratchet to move synchronously, driving the fan blades to exhaust air, connecting different functional transmissions. A fixed shaft is fixedly installed and passes through the inner wall of the fan cover. A worm wheel one is coaxially rotated on the outer circumference of the fixed shaft away from the inner wall of the fan cover. The worm gear one and the worm wheel one mesh with each other.

[0006] As a preferred technical solution of this invention, a drive shaft is rotatably provided on the side wall of the fan cover, and the free end of the drive shaft is coaxially and fixedly connected to the worm gear. A second worm is horizontally rotatably provided on the outer side wall of the fan cover, and the second worm is coaxially and fixedly connected to the drive shaft. A ratchet is coaxially and fixedly sleeved on the drive shaft. A pawl is hinged on one side wall of the worm gear, and one end of the pawl is fixedly connected to a torsion spring, and the other end of the torsion spring is fixedly connected to one side wall of the worm gear.

[0007] As a preferred technical solution of this invention, a rotating plate is fixedly provided on the outer circumference of the worm gear, a push plate is fixedly provided at the bottom end of the side wall of the rotating plate, a groove is fixedly provided on the inner circumference of the fan cover, a spring is fixedly connected to one side of the inner wall of the groove, a slider is fixedly connected to the free end of the spring, the bottom wall of the slider slides in cooperation with the groove, the slider corresponds to the protective net, and impacts the protective net under the push of the push plate, and reciprocates with the spring. The impact causes the protective net to vibrate to drive away birds.

[0008] As a preferred technical solution of this invention, a rotating shaft is rotatably provided inside the base plate. A worm gear is coaxially fixed at the upper end of the rotating shaft, and the worm gear meshes with a worm. A connecting block is fixedly connected to the lower end of the rotating shaft. A connecting rod is rotatably provided on the other end of the connecting block. A sector gear is rotatably provided on the bottom wall of the base plate. The sector gear converts the motion of the connecting rod into its own reciprocating oscillation, providing power to the gear. The sector gear is hinged to the free end of the connecting rod. A gear is rotatably provided on the bottom wall of the base plate. The gear meshes with the sector gear. A cleaning rod is fixedly connected to the gear.

[0009] As a preferred technical solution of this invention, the free end of the worm gear is fixedly provided with a fan blade.

[0010] As a preferred technical solution of this invention, a rainproof plate is fixedly provided on the outer wall of the frame, and the rainproof plate is located on the upper side of the fan cover.

[0011] The beneficial effects of this utility model after adopting the above structure are as follows: (1) Based on the principle of combining dynamic impact bird deterrence and static protective net, it achieves active bird deterrence and long-term protection, solving the problem that traditional static protective nets are easily breached by birds and require frequent maintenance. The structure uses a motor to drive a worm gear to drive a rotating plate to rotate synchronously, so that the push plate pushes the slider to impact the protective net. The vibration of the protective net actively drives away birds that attempt to stay or nest. At the same time, the protective net itself can statically isolate birds from entering the fan. The dual effect of dynamic impact and static protection not only prevents birds from staying near the protective net, but also prevents the protective net from being damaged by birds. There is no need for frequent manual inspection and cleaning, reducing bird deterrence maintenance costs and ensuring that the ventilation channel of the exhaust fan is unobstructed for a long time.

[0012] (2) Based on the principle of motor forward and reverse rotation switching, worm gear and ratchet pawl transmission, the linkage switching effect of ventilation and bird deterrence and roof cleaning functions is realized, which solves the problem of single function and high energy consumption of traditional equipment. When the motor rotates forward, the power is only used to drive the fan blades to exhaust air and the slider to strike and deter birds, which meets the daily ventilation and bird deterrence needs. When the motor rotates in reverse, the power is converted into the reciprocating motion of the cleaning rod through the components to achieve roof cleaning. There is no need to equip an additional cleaning motor. The dual-function linkage can be realized by simply switching the direction of a single motor, which reduces the equipment manufacturing cost and energy consumption and improves the overall efficiency of equipment use.

[0013] (3) Based on the principle of dual protection of rainproof board and protective net, the dual protection effect of rainproof and foreign object protection is achieved, which solves the problem that the traditional rainproof structure cannot isolate foreign objects and the protective net cannot block rainwater. The rainproof board on the outer wall of the frame can directly block rainwater from seeping into the outside of the exhaust fan, while the protective net on the inner wall of the fan cover can isolate birds, leaves, dust and other foreign objects from entering the fan, preventing the fan blades from being stuck by foreign objects or the ventilation channel from being blocked. The rainproof board and the protective net form dual protection against rainwater and foreign objects respectively, covering the main risk points of the outdoor operation of the exhaust fan and improving the operational stability of the equipment in severe weather such as rainy days and windy days. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] Figure 1 This is a schematic diagram of the overall structure of a rainproof and bird-proof structure for a stadium roof exhaust fan proposed in this utility model; Figure 2Cross-sectional view of the internal structure of a rainproof and bird-proof structure for a stadium roof exhaust fan proposed in this utility model. Figure 1 ; Figure 3 This is a schematic diagram of the connection structure between the worm gear 2 and the worm 2 proposed in this utility model; Figure 4 This is a schematic diagram of the connection structure between the sector gear and the connecting rod proposed in this utility model. Figure 5 Cross-sectional view of the internal structure of a rainproof and bird-proof structure for a stadium roof exhaust fan proposed in this utility model. Figure 2 ; Figure 6 for Figure 5 Enlarged view of a local structure in section A.

[0016] In the attached diagram: 1. Frame; 2. Fan cover; 3. Rainproof plate; 4. Protective net; 5. Base plate one; 6. Base plate two; 7. Worm gear one; 8. Worm wheel one; 9. Ratchet; 10. Pawl; 11. Motor; 12. Support plate; 13. Fan blade; 14. Worm gear two; 15. Worm wheel two; 16. Fixed shaft; 17. Sector gear; 18. Connecting block; 19. Connecting rod; 20. Gear; 21. Cleaning rod; 22. Rotating plate; 23. Spring; 24. Slider; 25. Push plate; 26. Groove; 27. Rotating shaft; 28. Transmission shaft. Detailed Implementation

[0017] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1-6As shown, a rainproof and bird-proof structure for a stadium roof exhaust fan includes a frame 1, and a fan cover 2, a base plate 5, and a base plate 6 fixedly mounted on the frame 1. The base plate 5 is located above the base plate 6, and the fan cover 2 is located above the base plate 5. A protective net 4 is fixedly installed on the inner wall of the fan cover 2. A rainproof plate 3 is fixedly installed on the outer wall of the frame 1, located above the fan cover 2. A support plate 12 is fixedly installed on the inner wall of the frame 1, and a motor 11 is fixedly installed on the upper wall of the support plate 12. A worm gear 7 is coaxially fixedly connected to one end of the motor 11. A fixed shaft 16 is fixedly installed and passes through the inner wall of the fan cover 2. A worm wheel 8 is coaxially rotatably mounted on the outer circumference of the fixed shaft 16 away from the inner wall of the fan cover 2. The worm gear 7 and the worm wheel 8 mesh with each other. A transmission shaft 28 is rotatably mounted on the side wall of the fan cover 2. The free end of worm gear 8 is coaxially and fixedly connected to worm wheel 8. Worm gear 14 is horizontally rotatably mounted on the outer wall of the fan cover 2. Worm gear 14 is coaxially and fixedly connected to transmission shaft 28. Ratchet 9 is coaxially and fixedly mounted on transmission shaft 28. Pawl 10 is hinged on the side wall of worm wheel 8. One end of pawl 10 is fixedly connected to torsion spring, and the other end of torsion spring is fixedly connected to the side wall of worm wheel 8. Fan blade 13 is fixedly mounted on the free end of worm gear 7. Rotating plate 22 is fixedly mounted on the outer circumference of worm gear 7. Push plate 25 is fixedly mounted on the bottom end of the side wall of rotating plate 22. Groove 26 is fixedly opened on the inner circumference of fan cover 2. Spring 23 is fixedly connected to one side of the inner wall of groove 26. Slider 24 is fixedly connected to the free end of spring 23. The bottom wall of slider 24 slides with groove 26. Slider 24 corresponds to protective net 4.

[0019] A rotating shaft 27 is rotatably and through the base plate 5. A worm gear 15 is coaxially fixed at the upper end of the rotating shaft 27. The worm gear 15 meshes with the worm 14. A connecting block 18 is fixedly connected to the lower end of the rotating shaft 27. A connecting rod 19 is rotatably mounted on the other end of the connecting block 18. A sector gear 17 is rotatably mounted on the bottom wall of the base plate 5. The sector gear 17 is hinged to the free end of the connecting rod 19. A gear 20 is rotatably mounted on the bottom wall of the base plate 5. The gear 20 meshes with the sector gear 17. A cleaning rod 21 is fixedly connected to the gear 20.

[0020] In practical use, firstly, start motor 11 to rotate forward. At this time, pawl 10 does not restrict ratchet 9. Motor 11 drives worm gear 7 to rotate, which in turn drives worm wheel 8 to rotate freely with worm gear 7. Pawl 10 remains unlocked from ratchet 9, and ratchet 9 remains stationary. During this process, worm gear 7 drives fan blade 13 to rotate, drawing in fresh air and expelling stale indoor air, thus achieving indoor air exchange and circulation. On the other hand, it drives rotating plate 22 to rotate synchronously. When push plate 25 on rotating plate 22 rotates to the lower position, it pushes slider 24 forward to impact the protective net 4. After the impact, slider 24 is pulled back to its original position by spring 23. As rotating plate 22 continues to rotate, push plate 25 repeatedly pushes slider 24, achieving intermittent impact on the protective net 4, causing it to vibrate and thus repelling birds. When encountering severe weather or when the roof needs cleaning, the rotation direction of motor 11 is changed, causing motor 11 to rotate in the opposite direction. At this time, pawl 10 restricts ratchet 9, and motor 11 drives worm gear 7, worm wheel 8 and ratchet 9 to rotate synchronously. This rotational motion is transmitted to worm gear 14 through transmission shaft 28. Since worm gear 14 and worm wheel 15 mesh with each other, worm wheel 15 rotates synchronously. Subsequently, rotating shaft 27 rotates with worm wheel 15, thereby driving connecting block 18 to rotate. Connecting block 18 drives connecting rod 19 to move, which in turn drives sector gear 17 to oscillate back and forth. Since sector gear 17 and gear 20 mesh with each other, gear 20 oscillates back and forth with sector gear 17, and drives sweeping rod 21 to move back and forth, completing the roof cleaning operation.

[0021] If any person skilled in the art, inspired by this invention, designs a similar structure or embodiment without departing from the spirit of this invention, such design should fall within the protection scope of this invention.

Claims

1. A rainproof and bird-proof structure for a rooftop exhaust fan in a stadium, comprising a frame (1), and further comprising a fan cover (2), a base plate one (5), and a base plate two (6) fixedly mounted on the frame (1), characterized in that: The first base plate (5) is located on the upper side of the second base plate (6), the fan cover (2) is located on the upper side of the first base plate (5), the inner wall of the fan cover (2) is fixedly provided with a protective net (4), the inner wall of the frame (1) is fixedly provided with a support plate (12), the upper wall of the support plate (12) is fixedly provided with a motor (11), one end of the motor (11) is coaxially fixedly connected with a worm gear (7), the inner wall of the fan cover (2) is fixedly provided with a fixed shaft (16), the outer circumference of the fixed shaft (16) away from the inner wall of the fan cover (2) is coaxially provided with a worm wheel (8), and the worm gear (7) and the worm wheel (8) mesh with each other.

2. The rainproof and bird-proof structure for a stadium roof exhaust fan according to claim 1, characterized in that: The fan cover (2) has a rotating drive shaft (28) on its side wall. The free end of the drive shaft (28) is coaxially fixedly connected to the first worm gear (8). The outer side wall of the fan cover (2) has a horizontally rotating worm gear (14). The second worm gear (14) is coaxially fixedly connected to the drive shaft (28). A ratchet (9) is coaxially fixedly sleeved on the drive shaft (28). A pawl (10) is hinged on the side wall of the first worm gear (8). One end of the pawl (10) is fixedly connected to a torsion spring, and the other end of the torsion spring is fixedly connected to the side wall of the first worm gear (8).

3. The rainproof and bird-proof structure for a stadium roof exhaust fan according to claim 2, characterized in that: A rotating plate (22) is fixedly provided on the outer circumference of the worm gear (7). A push plate (25) is fixedly provided at the bottom of the side wall of the rotating plate (22). A groove (26) is fixedly provided on the inner circumference of the fan cover (2). A spring (23) is fixedly connected to one side of the inner wall of the groove (26). A slider (24) is fixedly connected to the free end of the spring (23). The bottom wall of the slider (24) slides in cooperation with the groove (26). The slider (24) corresponds to the protective net (4).

4. The rainproof and bird-proof structure for a stadium roof exhaust fan according to claim 3, characterized in that: The base plate (5) is rotatably provided with a rotating shaft (27). The upper end of the rotating shaft (27) is coaxially fixed with a worm gear (15). The worm gear (15) meshes with the worm (14). The lower end of the rotating shaft (27) is fixedly connected with a connecting block (18). The other end of the connecting block (18) is rotatably provided with a connecting rod (19). The bottom wall of the base plate (5) is rotatably provided with a sector gear (17). The sector gear (17) is hinged to the free end of the connecting rod (19). The bottom wall of the base plate (5) is rotatably provided with a gear (20). The gear (20) meshes with the sector gear (17). A cleaning rod (21) is fixedly connected to the gear (20).

5. The rainproof and bird-proof structure for a stadium roof exhaust fan according to claim 4, characterized in that: The free end of the worm gear (7) is fixedly provided with a fan blade (13).

6. The rainproof and bird-proof structure for a stadium roof exhaust fan according to claim 5, characterized in that: The outer wall of the frame (1) is fixed with a rainproof plate (3), which is located on the upper side of the fan cover (2).

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