Snow-proof cover for axial flow fan

Abstract

The utility model discloses a snow-proof cover for an axial flow fan, which relates to a protective appliance for protecting the axial flow fan, and is characterized by comprising a snow-proof cover body, the snow-proof cover body comprises a bottom plate and a plurality of protective plates, the bottom plate is provided with vent holes, and the snow-proof cover body has an open state and a closed state. When the snow-proof cover body is in an open state, the plurality of protection plates are arranged in an upward inclined mode, the ventilation holes are opened, and when the snow-proof cover body is in a closed state, the plurality of protection plates abut against the bottom plate, and the ventilation holes are covered. Through the design of the waterproof cover body and the snow-proof cover body, sundries such as snowflakes, ice chips and the like can be effectively prevented from entering the fan, the failure rate of the axial flow fan in severe weather is reduced, meanwhile, the snow-proof cover can block the snowflakes, smooth passing of airflow is ensured, and the working efficiency of the fan is not affected.

Description

Technical Field

[0001] The utility model relates to a protective tool for protecting an axial flow fan, and more specifically, to a snow shield for an axial flow fan. Background Art

[0002] An axial flow fan is a common type of fan. Its main feature is that the air flow direction is parallel to the fan shaft, that is, the air flow flows axially. The working principle of the axial flow fan is to use the rotating impeller to apply energy to the gas, so as to improve its pressure and speed. The axial flow fan has a very wide range of uses. In environments such as buildings, factories, and tunnels, it is used to provide fresh air, remove harmful gases or moisture; in the industrial production process, it is used to cool equipment or products to maintain an appropriate temperature. Due to its advantages such as simple structure, stable operation, convenient maintenance, and relatively low cost, the axial flow fan has been widely used in industrial and civil fields.

[0003] Under cold climatic conditions, when the axial flow fan stops operating outdoors for a long time, it is easily affected by external environmental factors such as snowflakes and ice frost, resulting in blockage or freezing of components such as the fan blades, mesh covers, and bearings, seriously affecting the normal operation of the fan. The existing axial flow fans lack effective protective structures, and snowflakes can easily enter the fan interior through the gaps in the mesh covers. Moreover, most of the existing protective measures are relatively complex and will hinder the air outlet of the fan, affecting the fan efficiency.

[0004] Therefore, there is an urgent need for a snow shield with a simple structure and not affecting the fan performance, which can efficiently prevent snowflakes from entering the fan interior in snowy days and ensure the normal operation of the fan. Summary of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a snow shield for an axial flow fan.

[0006] The above technical purpose of the present utility model is achieved through the following technical solutions: A snow shield for an axial flow fan includes a snow shield body and several connecting rods. The snow shield body includes a bottom plate and several protective plates. Several ventilation holes are opened on the bottom plate. Several of the protective plates are rotatably connected to the bottom plate. The snow shield body includes an open state and a closed state. When the snow shield body is in the open state, several of the protective plates are inclined upward and the ventilation holes are opened. When the snow shield body is in the closed state, several of the protective plates are pressed against the bottom plate and the ventilation holes are covered. One end of the connecting rod is fixedly connected to the bottom plate by bolts, and the other end of the connecting rod is used to be fixed to the axial flow fan housing.

[0007] The present utility model is further configured as follows: A limiting hem is provided on the bottom plate, and a groove for accommodating the rotation of the protection plate is formed between the limiting hem and the bottom plate. When the snow shield body is in the open state, the top surface of the protection plate abuts against the limiting hem.

[0008] The present utility model is further configured as follows: A connecting shaft is provided on the inner wall of the groove. Both ends of the connecting shaft are fixedly connected to the limiting hem by bolts, and one end of the protection plate is rotatably connected to the connecting shaft.

[0009] The present utility model is further configured as follows: Four connecting rods, protection plates, and limiting hems are provided. A notch is formed between two adjacent limiting hems.

[0010] The present utility model is further configured as follows: When the snow shield body is in the closed state, a water guiding channel is formed between two adjacent protection plates, and the water guiding channel communicates with the notch.

[0011] The present utility model is further configured as follows: An installation block for fixing to the outer shell of the axial flow fan is provided at the end of the connecting rod away from the bottom plate, and a threaded hole is provided on the installation block.

[0012] The present utility model is further configured as follows: The bottom plate, protection plate, limiting hem, and connecting rod are all made of galvanized steel plates.

[0013] In summary, the present utility model has the following beneficial effects: By providing the waterproof cover body, the design of the snow shield body can effectively prevent snowflakes, ice chips and other sundries from entering the interior of the fan, reducing the failure rate of the axial flow fan in bad weather. At the same time, while blocking the snowflakes, the snow shield ensures the smooth passage of the air flow and does not affect the working efficiency of the fan. By providing the notch and the water guiding channel, the snow water can flow out smoothly through the notch, avoiding the formation of water accumulation and ice in the cover body, thereby affecting the normal opening of the protection plate. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the snow shield body of the present utility model in the open state;

[0015] Figure 2 is a schematic structural diagram of the snow shield body of the present utility model in the closed state;

[0016] Figure 3 is a partial cross-sectional view of the present utility model;

[0017] Figure 4 is Figure 3 an enlarged schematic view of part A in

[0018] In the figure: 1. Snow shield body; 2. Connecting rod; 3. Bottom plate; 4. Protection plate; 5. Ventilation hole; 6. Outer shell; 7. Limit flange; 8. Groove; 9. Connecting shaft; 10. Notch; 11. Water guiding channel; 12. Installation block. Detailed implementation mode

[0019] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0020] To better describe and illustrate the embodiments of the present application, one or more accompanying drawings may be referred to, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the utility models, the currently described embodiments, or the preferred modes of the present application.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model, rather than indicating that the device referred to must have a specific orientation or operate in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0023] Next, the present utility model will be described in detail in conjunction with the accompanying drawings and embodiments.

[0024] A snow shield for an axial flow fan, as Figure 1 shown, includes a snow shield body 1 and several connecting rods 2. Specifically, the snow shield body 1 includes a bottom plate 3 and several protection plates 4. A plurality of ventilation holes 5 are provided on the bottom plate 3, and several protection plates 4 are all rotatably connected to the bottom plate 3. Further, the bottom plate 3, the protection plates 4, and the connecting rods 2 are all made of galvanized plates. The zinc layer on the galvanized plates can effectively prevent the steel plates from rusting and can maintain a long service life even under harsh climate conditions. At the same time, the maintenance cost of the galvanized plates is relatively low because their corrosion resistance reduces the frequency of maintenance and replacement.

[0025] Specifically, the snow shield body 1 has an open state and a closed state. When the snow shield body 1 is in the open state, several protective plates 4 are arranged to incline upward and the ventilation holes 5 are open. When the snow shield body 1 is in the closed state, several protective plates 4 are pressed against the bottom plate 3 and the ventilation holes 5 are covered. One end of the connecting rod 2 is fixedly connected to the bottom plate 3 by bolts, and the other end of the connecting rod 2 is used to be fixed to the axial flow fan housing 6. The connecting rod 2 plays a role in connecting and supporting, ensuring the stability of the snow shield body 1 during use, preventing it from tilting and collapsing, and ensuring the snow protection effect of the snow shield body 1. By setting the bottom plate 3 and the protective plates 4, the bottom plate 3 can be used for support. When the snow shield body 1 is in the closed state, the protective plates 4 are closely attached to the bottom plate 3 and block the ventilation holes 5. At this time, the protective plates 4 can prevent sundries such as snowflakes and ice chips from falling on the surface of the fan and entering the fan through the ventilation holes 5, thereby reducing the failure rate of the axial flow fan in bad weather. By setting the ventilation holes 5, when the axial flow fan is in the working state, the wind blown by the axial flow fan at this time will cause the snow shield body 1 to be in the open state, and the wind force will cause the protective plates 4 to rotate, ensuring that while the snow shield blocks snowflakes, the smooth passage of air flow is ensured and the working efficiency of the fan is not affected. Further, an installation block 12 for fixing to the axial flow fan housing 6 is provided at the end of the connecting rod 2 away from the bottom plate 3. Threaded holes are provided on the installation block 12. Through the threaded holes, it is convenient to use bolts to fix the snow shield to the fan housing 6, ensuring the stability and safety of the snow shield under bad weather conditions. And when it is necessary to repair and replace the snow shield, this design also facilitates the operator to disassemble it, reducing the repair time and cost.

[0026] Limit flanges 7 are provided around the bottom plate 3. Specifically, the limit flanges 7 are integrally formed on the bottom plate 3 and can be formed by folding. This design facilitates the production of the snow shield body 1, simplifies the process, and at the same time ensures the connection strength between the bottom plate 3 and the limit flanges 7, making the snow shield more stable. A groove 8 for accommodating the rotation of the protective plate 4 is formed between the limit flanges 7 and the bottom plate 3. When the snow shield body 1 is in the open state, the top surface of the protective plate 4 abuts against the limit flanges 7. By setting the limit flanges 7, when the axial flow fan is in the working state and the snow shield body 1 is in the open state, at this time the protective plates 4 rotate under the action of the wind force and abut against the limit flanges 7. The limit flanges 7 can ensure that the protective plates 4 remain in the correct position during rotation, prevent them from deviating from the predetermined rotation trajectory, and avoid the protective plates 4 from flipping too much and being unable to return to the original state.

[0027] Specifically, a connecting shaft 9 is provided on the inner wall of the groove 8. Both ends of the connecting shaft 9 are fixedly connected to the limiting flange 7 by bolts. One end of the protection plate 4 is rotatably connected to the connecting shaft 9. The connecting shaft 9 serves as the rotation center, providing a stable support point, enabling the protection plate 4 to be reliably fixed on the bottom plate 3 while allowing necessary rotation. Moreover, the connecting shaft 9 connected by bolts is easy to inspect and replace, which helps with maintenance work and ensures the long-term effective operation of the snow shield.

[0028] There are four connecting rods 2, protection plates 4, and limiting flanges 7 respectively. A notch 10 is formed between two adjacent limiting flanges 7. The four symmetrically arranged connecting rods 2 and protection plates 4 provide balanced mechanical support, making the snow shield more stable and capable of withstanding wind force and snow pressure. Further, when the snow shield body 1 is in the closed state, a water guiding channel 11 is formed between two adjacent protection plates 4, and the water guiding channel 11 communicates with the notch 10. By setting the notch 10 and the water guiding channel 11, snow water can flow out smoothly through the notch 10, avoiding the formation of ice due to accumulated water in the shield body, which may affect the normal opening of the protection plate 4. At the same time, avoiding the accumulation of water and snow can reduce the additional weight borne by the snow shield, reduce the pressure on the support structure, and improve the overall stability and durability.

[0029] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. An anti-snow cover for an axial flow fan, characterized in that: It includes a snow shield body and several connecting rods. The snow shield body includes a bottom plate and several protective plates. A plurality of ventilation holes are formed in the bottom plate. The plurality of protective plates are all rotatably connected to the bottom plate. The snow shield body has an open state and a closed state. When the snow shield body is in the open state, the plurality of protective plates are arranged to incline upward and the ventilation holes are opened. When the snow shield body is in the closed state, the plurality of protective plates are pressed against the bottom plate and the ventilation holes are covered. One end of the connecting rod is fixedly connected to the bottom plate by bolts, and the other end of the connecting rod is used to be fixed to the axial flow fan housing.

2. The snow cover for an axial flow fan according to claim 1, characterized in that: A limiting hem is provided on the bottom plate. A groove for accommodating the rotation of the protective plate is formed between the limiting hem and the bottom plate. When the snow shield body is in the open state, the top surface of the protective plate is pressed against the limiting hem.

3. The snow shield for an axial flow fan according to claim 2, characterized in that: A connecting shaft is provided on the inner wall of the groove. Both ends of the connecting shaft are fixedly connected to the limiting hem by bolts, and one end of the protective plate is rotatably connected to the connecting shaft.

4. The snow shield for an axial flow fan according to claim 1, characterized in that: There are four connecting rods, protective plates and limiting hems respectively. A notch is formed between two adjacent limiting hems.

5. The snow shield for an axial flow fan according to claim 4, characterized in that: When the snow shield body is in the closed state, a water guiding channel is formed between two adjacent protective plates and the water guiding channel communicates with the notch.

6. The snow shield for an axial flow fan according to claim 1, characterized in that: An installation block for fixing to the axial flow fan housing is provided at the end of the connecting rod away from the bottom plate, and a threaded hole is formed in the installation block.

7. The snow shield for an axial flow fan according to claim 1, characterized in that: The bottom plate, protective plate, limiting hem and connecting rod are all made of galvanized plates.

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