Fan protection cover

Abstract

The utility model relates to a fan protective cover which comprises a protective cover body, the protective cover body is of a circular net structure and is formed by splicing two half covers, each half cover comprises a plurality of arc-shaped wire rods and at least one spoke-shaped wire rod, the arc-shaped wire rods are concentrically arranged at intervals, and the spoke-shaped wire rods are arranged in the radial direction. The at least one spoke-shaped wire rod comprises a first reinforcing spoke formed by splicing two parallel wire rods, the first reinforcing spoke extends in the direction of the semi-circle diameter of the half cover and is connected with each arc-shaped wire rod, a vertical reinforcing plate is further arranged on the half cover in the direction of the semi-circle diameter, and the first reinforcing spoke is connected with each arc-shaped wire rod in the direction of the semi-circle diameter. And the vertical reinforcing plate is fixedly connected with one wire rod forming the first reinforcing spoke. By the adoption of the fan protection cover, the rigidity of the whole area and the rigidity of the local area of the fan protection cover can be improved, the inherent frequency of the fan protection cover is greatly improved, and therefore the problems of structural failure and the like caused by resonance are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fan protection covers, in particular to a fan protection cover for a high-power fan. Background Art

[0002] Industrial large fans are widely used in many fields. Their main functions are to improve indoor and outdoor air quality, promote air circulation, and achieve cooling, dehumidification and dehumidification effects. However, due to the harsh working environment of high-power fans in industrial applications, it is necessary to provide a safe and reliable fan protection cover for the fan, which is used to protect the fan blades on the one hand and protect the operator from being injured by the high-speed rotating blades on the other hand.

[0003] Fan guards known in the prior art usually use a variety of spokes arranged in a staggered manner to form a protective mesh. However, such fan guards generally have a low rigidity, which makes their natural frequency low and unable to avoid the excitation frequency of the outside world. In particular, since the known fan guards have a low natural frequency, resonance often occurs due to the high-frequency vibration of the fan when the fan is running, which eventually causes the welds between the spokes that make up the fan guard to crack, leading to connection failure and other problems. In addition, there will be greater stress in certain local areas of the fan guard, causing the structure there to fail prematurely (including weld cracking or structural deformation, etc.).

[0004] Therefore, there is a need to provide an improved fan protection cover, which is particularly suitable for high-power fans and is not easily affected by high-frequency vibrations. Utility Model Content

[0005] The present utility model is proposed based on such background, and its purpose is to provide an improved fan protection cover so as to overcome one or more of the above problems in the prior art.

[0006] The utility model proposes a fan protective cover, which comprises a protective cover body, wherein the protective cover body is a circular mesh structure and is composed of two half covers spliced ​​together, each half cover comprises a plurality of arc-shaped wires arranged concentrically and spaced apart from each other and at least one spoke-shaped wire arranged along a radial direction, the at least one spoke-shaped wire comprises a first reinforcing spoke formed by splicing two parallel wires, the first reinforcing spoke extends in the direction of the semicircular diameter of the half cover and is connected to each arc-shaped wire, wherein the half cover is also arranged with a vertical reinforcing plate in the direction of the semicircular diameter, and the vertical reinforcing plate is fixedly connected to a wire constituting the first reinforcing spoke.

[0007] As an embodiment, the vertical reinforcement plate includes a first edge and a second edge opposite to each other in the vertical direction, wherein the second edge extends beyond the outer cover surface defined by the protective cover body, and the vertical reinforcement plate is fixedly connected to the wire constituting the first reinforcement spoke near the first edge.

[0008] As an implementation manner, the vertical reinforcing plate maintains a distance from the end of each arc-shaped wire.

[0009] As an embodiment, at least two of the plurality of arc-shaped wires located radially outward are arranged relative to the remaining arc-shaped wires such that an inclined cover surface portion is defined by the at least two arc-shaped wires.

[0010] As an embodiment, the first reinforcing spoke has two opposite first inclined spoke parts corresponding to the inclined cover part, and a mounting foot is formed at the end of each first inclined spoke part.

[0011] As an embodiment, the vertical reinforcement plate includes a middle main body portion and inclined reinforcement plate portions arranged on both sides of the middle main body portion, and the inclined reinforcement plate portions extend from the middle main body portion along the inclined cover portion and the first inclined spoke portion to a mounting foot near the end of the first inclined spoke portion.

[0012] As an embodiment, the spoke-shaped wire also includes at least one second reinforced spoke formed by splicing two parallel wires, the second reinforced spoke extends toward the center of the half cover in the direction of the semicircular radius of the half cover and is fixedly connected to the first reinforced spoke, each second reinforced spoke has a second inclined spoke portion corresponding to the inclined cover surface portion and a mounting foot is formed at the end of the second inclined spoke portion.

[0013] As an embodiment, the spoke-shaped wire also includes a plurality of third reinforcing spokes, each of which extends in the semicircular radius direction of the half cover and is composed of a single wire, and at least one of the plurality of third reinforcing spokes extends from the arc-shaped wire located at the radially outermost side toward the center of the half cover to be fixedly connected to the first reinforcing spoke, or extends to be spaced a distance from the first reinforcing spoke.

[0014] As an embodiment, a diameter of a single wire constituting the first reinforcing spoke and the second reinforcing spoke is at least twice the diameter of the arc-shaped wire.

[0015] As an implementation manner, the diameter of the wire material constituting the third reinforcing spoke is larger than the diameter of the arc-shaped wire material but smaller than the diameter of the single wire material constituting the first reinforcing spoke and the second reinforcing spoke.

[0016] The fan protection cover according to the utility model is suitable for high-power fans, and its overall structure is firm and not easily affected by high-frequency vibration. Each half cover is provided with a wire structure with different diameters (including arc-shaped spokes and multiple reinforced spokes) and a vertical reinforcement plate in the semicircular diameter direction of the half cover, which greatly improves the rigidity of the overall structure, effectively avoids the resonance frequency, thereby reducing the risk of failure of the connection part due to resonance and increasing the safety performance of the product during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features and advantages of the present invention will become more easily understood through the following description with reference to the accompanying drawings, in which:

[0018] Figure 1 A three-dimensional view of a half cover of a fan protection cover according to an embodiment of the utility model is shown;

[0019] Figure 2 Shows Figure 1 A front view of the half-mask in FIG.

[0020] Figure 3 Shows Figure 1 An enlarged view of a partial portion of the half cover at one end near the vertical reinforcing plate;

[0021] Figure 4 Shows Figure 1 An enlarged view of a partial portion of the half cover near the center of the first reinforcing spoke; and

[0022] Figure 5 Shows Figure 1 A top view of the half hood.

[0023] All the drawings are only schematic and not necessarily drawn to scale, and they only show those parts necessary for illustrating the present invention, and other parts are omitted or merely mentioned. That is, in addition to the parts shown in the drawings, the present invention may also include other parts. DETAILED DESCRIPTION

[0024] In the following description, many specific details are set forth so that those skilled in the art can more fully understand the present invention. However, it is obvious to those skilled in the art that the present invention may be implemented without some of these specific details. The following various aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims unless explicitly stated in the claims. Terms such as "first" and "second" are used below to describe the elements of the present application, and these terms are only used to distinguish between the various elements without intending to limit the nature, sequence, order or number of these elements. In addition, it should be noted that in this specification, the same and / or functionally identical technical features are marked with the same or similar figures.

[0025] The utility model aims to propose an improved fan protection cover, which can increase the stiffness of the fan protection cover as a whole and in local areas, thereby greatly improving its natural frequency, so that it can avoid the excitation frequency and avoid resonance, thereby avoiding problems such as structural failure caused by resonance.

[0026] According to the fan protection cover of the utility model, it generally comprises a protection cover body with a circular mesh structure (in a top view). The protection cover body can be formed by splicing two half covers 1. Figure 1 , which shows a three-dimensional view of a half-cover of a fan protective cover according to an embodiment of the utility model. The half-cover 1 includes a plurality of arc-shaped wires 11 arranged concentrically and spaced apart from each other, and the arc diameters of these arc-shaped wires 11 gradually increase from the inside to the outside along the radial direction. In addition, the half-cover 1 also includes at least one spoke-shaped wire arranged along the radial direction (for example, along the semicircular diameter direction or semicircular radius direction of the half-cover), so that these spoke-shaped wires and the arc-shaped wires 11 together form a protective cover structure with a mesh gas flow channel.

[0027] In order to solve the problem of low natural frequency caused by low stiffness in the prior art, the utility model proposes an improved fan protective cover, wherein at least one spoke-shaped wire in each half cover 1 constituting the protective cover body may include a first reinforcing spoke 12, and the first reinforcing spoke 12 may be formed by connecting two parallel wires end to end to form a ring structure (such as Figure 5 It can be clearly seen in the figure that it extends in the direction of the semicircular diameter of the half cover 1 and is connected to each arc-shaped wire 11. In order to further improve the structural rigidity of the fan protection cover as a whole, the half cover 1 is also arranged with a vertical reinforcement plate 13 in the direction of the semicircular diameter, and the vertical reinforcement plate 13 is fixedly connected to one of the wires constituting the first reinforcement spoke 12 (see Figure 1 and Figure 3 ), for example by welding.

[0028] Continue to see Figure 2 , the vertical reinforcing plate 13 includes a first edge 131 and a second edge 132 that are opposite to each other in the vertical direction. Figure 3 As shown in the figure, the second edge 132 exceeds the outer cover surface defined by the protective cover body, so that the vertical reinforcing plate 13 is located outside the internal fan space defined by the protective cover body as a whole. This arrangement is advantageous because the vertical reinforcing plate 13 does not invade the internal fan space and leaves enough distance between it and the fan (not specifically shown in the figure), thereby avoiding any potential interference risk.

[0029] In a specific embodiment of the present invention, the vertical reinforcing plate 13 is fixedly connected to the one wire material constituting the first reinforcing spoke 12 near the first edge 131. Advantageously, the vertical reinforcing plate 13 does not contact the ends of the arc-shaped wire materials 11, or a certain interval is reserved between the ends of the arc-shaped wire materials 11, so as to avoid causing other stress problems to the arc-shaped wire materials 11 while ensuring the rigidity of the overall protective cover.

[0030] In the fan protective cover involved in the utility model, at least two of the plurality of arc-shaped wires 11 constituting the protective cover body, which are located radially outward, are arranged relative to the remaining arc-shaped wires so that the at least two arc-shaped wires define a semi-circular inclined cover surface portion 111, so that the protective cover body has a truncated cone structure (such as Figure 1 The semi-truncated conical section shown). See in particular Figure 3 In order to adapt to the inclined cover portion 111, the first reinforcing spoke 12 composed of two parallel wires has two opposite first inclined spoke portions 121 ( Figure 3 Only one of the first inclined spoke portions 121 is shown in the figure, and a mounting foot 122 is formed at the end of each first inclined spoke portion 121.

[0031] Since there is a risk of connection failure at the connection portion between the inclined cover portion 111 and the first inclined spoke portion 121, in order to enhance the structural strength there, the vertical reinforcing plate 13 is advantageously provided with an inclined reinforcing plate portion 133, which is provided on both sides of the middle main body portion 134. Thus, the inclined reinforcing plate portion 133 of the vertical reinforcing plate 13 can extend from the middle main body portion 134 along the inclined cover portion 111 and the first inclined spoke portion 121 to the mounting foot 122 near the end of the first inclined spoke portion 121. This arrangement can greatly improve the structural strength at the inclined cover portion 111, thereby avoiding any potential failure risk.

[0032] Return to see Figure 1The spoke-shaped wire material constituting the protective cover body may also include at least one second reinforcing spoke 14 formed by splicing two parallel wire materials. Figure 1 In the embodiment shown in FIG. 1 , two symmetrically arranged second reinforcing spokes 14 are provided, and the angle between them is, for example, 60°. Of course, other angle designs are also feasible.

[0033] See also Figure 4 and Figure 5 The second reinforcing spokes 14 extend in the direction of the semicircular radius of the half cover 1 toward the center O of the half cover 1 and are fixedly connected to the first reinforcing spokes 12 (more precisely, to another wire material constituting the first reinforcing spokes 12). Each second reinforcing spoke 14 has a second inclined spoke portion 141 (see FIG. 14 ) arranged corresponding to the inclined cover surface portion 111. Figure 1 ) and a mounting foot 142 is formed at the end of the second inclined spoke portion 141. In this embodiment, for each half cover 1, a total of four mounting feet are provided, including two mounting feet formed by the first reinforcing spokes 12 and two mounting feet formed by the two second reinforcing spokes 14. The four mounting brackets are located on the same semicircle (see Figure 5 1 and 1 ). According to the specific embodiment shown in the figure, the mounting legs can be formed as a U-shaped structure at the ends of the first and second reinforcing spokes. The mounting legs are spaced 60° apart from each other. For example, threaded fasteners can be passed through these mounting legs to fix the fan guard to the fixing bracket of the fan.

[0034] Continue to see Figure 5 In order to further improve the overall rigidity of the fan protective cover, the spoke-shaped wire material constituting the protective cover body may also advantageously include a third reinforcing spoke 15 extending in the semicircular radius direction of the half cover 1 and consisting of a single wire material, wherein the third reinforcing spoke 15 extends from the arc-shaped wire material located at the outermost radial side toward the center O of the half cover 1 to the point where it is fixedly connected to the first reinforcing spoke 12 (such as Figure 5 Advantageously, in order to avoid the influence on the stiffness mode and reduce the weight of the protective cover as much as possible, a third reinforcing spoke 15 can be provided, which extends toward the center O of the half cover, but does not extend to connect with the first reinforcing spoke 12 but is spaced a certain distance therefrom (such as Figure 5 Two third reinforcing spokes 15 are located between the second reinforcing spokes and the first reinforcing spokes. This arrangement is advantageous because it not only increases rigidity and reduces weight, but also strengthens the arc-shaped wire material located radially outwardly to form the inclined cover surface portion, thereby preventing local deformation of the cover surface.

[0035] Industrial Applicability

[0036] The fan protection cover of the utility model can be applied to various scenarios where a fan device is required, and is particularly suitable for industrial application scenarios with high-power fans and relatively harsh working environments. The fan protection cover according to the utility model has a firm overall structure and is not easily affected by high-frequency vibrations, thereby increasing the safety performance of the product during operation.

[0037] The fan protective cover according to the utility model adopts a structural form formed by splicing two half-covers, wherein each half-cover can be a mesh structure composed of wires with different diameters (including arc-shaped wires and multiple spoke-shaped wires). For example, in the actual design of the fan protective cover, the diameter of the single wire constituting the first reinforcement spoke and the second reinforcement spoke is at least twice the diameter of the arc-shaped wire; the diameter of the wire constituting the third reinforcement spoke is larger than the diameter of the arc-shaped wire but smaller than the diameter of the single wire constituting the first reinforcement spoke and the second reinforcement spoke. For example, the diameter of the arc-shaped wire is preferably 4mm, the diameter of the single wire of the first reinforcement spoke is preferably 8mm, and the diameter of the wire of the third reinforcement spoke is preferably 6mm. With this specific design, the overall stiffness of the fan protective cover can be greatly improved, and the risk of structural failure of the fan protective cover due to resonance can be reduced, thereby reducing the maintenance cost of the product.

[0038] The vertical reinforcing plate provided in the fan protection cover is advantageously arranged outside the fan, especially outside the internal fan space defined by the fan protection cover, so that the problem of interference with the fan is avoided while ensuring the stiffness mode of the overall structure. In addition, in order to adapt to the inclined cover surface portion of the protection cover body, the vertical reinforcing plate is correspondingly provided with an inclined reinforcing plate portion, thereby specifically enhancing the structural strength of the fan protection cover at the inclined cover surface portion, thereby improving the safety performance of the entire product structure.

[0039] It should be noted that the embodiments described above are only to be considered as exemplary, and the present invention is not limited to these embodiments. By considering the contents of this specification, those skilled in the art may make various changes and modifications without departing from the scope or spirit of the present invention. The true scope of the present invention is defined by the appended claims and equivalents.

Claims

1. A fan protective cover, comprising a protective cover body, wherein the protective cover body is a circular mesh structure and is composed of two half covers (1) spliced ​​together, each half cover comprising a plurality of arc-shaped wires (11) arranged concentrically and spaced apart from each other and at least one spoke-shaped wire arranged in a radial direction, characterized in that: The at least one spoke-shaped wire comprises a first reinforcing spoke (12) formed by splicing two parallel wires, the first reinforcing spoke extending in the direction of the semicircular diameter of the half cover (1) and connected to each arc-shaped wire (11), wherein the half cover is also provided with a vertical reinforcing plate (13) in the direction of the semicircular diameter, the vertical reinforcing plate (13) being fixedly connected to a wire constituting the first reinforcing spoke (12).

2. The fan protection cover according to claim 1, characterized in that: The vertical reinforcing plate (13) includes a first edge (131) and a second edge (132) opposite to each other in the vertical direction, wherein the second edge (132) extends beyond the outer cover surface defined by the protective cover body, and the vertical reinforcing plate is fixedly connected to the wire material constituting the first reinforcing spoke (12) near the first edge (131).

3. The fan protection cover according to claim 2, characterized in that: The vertical reinforcing plate (13) maintains a spacing from the end of each arc-shaped wire (11).

4. The fan protection cover according to claim 3, characterized in that: At least two of the plurality of arc-shaped wires (11) located radially outward are arranged relative to the remaining arc-shaped wires such that an inclined cover surface portion (111) is defined by the at least two arc-shaped wires.

5. The fan protection cover according to claim 4, characterized in that: The first reinforcing spoke (12) has two opposite first inclined spoke parts (121) arranged corresponding to the inclined cover part (111), and a mounting foot is formed at the end of each first inclined spoke part.

6. The fan protection cover according to claim 5, characterized in that: The vertical reinforcement plate (13) includes a middle main body portion (134) and inclined reinforcement plate portions (133) arranged on both sides of the middle main body portion, and the inclined reinforcement plate portions extend from the middle main body portion along the inclined cover portion (111) and the first inclined spoke portion (121) to a mounting foot near the end of the first inclined spoke portion.

7. The fan protection cover according to claim 5, characterized in that: The spoke-shaped wire also includes at least one second reinforcing spoke (14) formed by splicing two parallel wires, the second reinforcing spoke extending in the direction of the semicircular radius of the half cover (1) toward the center (O) of the half cover and fixedly connected to the first reinforcing spoke (12), each second reinforcing spoke (14) having a second inclined spoke portion (141) arranged corresponding to the inclined cover surface portion (111) and a mounting foot formed at the end of the second inclined spoke portion.

8. The fan protection cover according to claim 7, characterized in that: The spoke-shaped wire further comprises a plurality of third reinforcing spokes (15), each of which extends in the semicircular radius direction of the half cover and is composed of a single wire, and at least one of the plurality of third reinforcing spokes (15) extends from the arc-shaped wire (11) located at the outermost radial side toward the center (O) of the half cover (1) to be fixedly connected with the first reinforcing spoke (12), or extends to be spaced a distance from the first reinforcing spoke (12).

9. The fan protection cover according to claim 7 or 8, characterized in that: The diameter of a single wire material constituting the first reinforcing spoke (12) and the second reinforcing spoke (14) is at least twice the diameter of the arc-shaped wire material (11).

10. The fan protection cover according to claim 8, characterized in that: The diameter of the wire material constituting the third reinforcing spoke (15) is greater than the diameter of the arc-shaped wire material (11) but smaller than the diameter of the single wire material constituting the first reinforcing spoke (12) and the second reinforcing spoke (14).

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