Explosion-proof fan blade

Abstract

The utility model relates to the technical field of fan accessories, and discloses an explosion-proof fan blade which comprises an explosion-proof fan output shaft, fan blades are arranged on the explosion-proof fan output shaft, a blocking piece is arranged on the outer surface of the explosion-proof fan output shaft and located behind the fan blades, a protective cover is arranged on the outer surface of the fan blades, and the protective cover is arranged on the outer surface of the explosion-proof fan output shaft and located behind the fan blades. The protective cover covers the explosion-proof fan, inner holes are formed in the fan blades and distributed in a curve array mode, outer holes are formed in the fan blades and distributed in a curve array mode, the outer holes are located on the outer sides of the inner holes, and the blocking pieces are made of aluminum alloy materials. A fixing hole is formed in the middle of the blocking piece, the inner cavity wall of the fixing hole is fixedly connected with the outer surface of the output shaft of the anti-explosion fan, and a dissipation hole is formed in the blocking piece. According to the anti-explosion fan, vortexes generated in the anti-explosion fan can be conveniently reduced, and the rotation stability of the fan blades can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fan accessories, in particular to an explosion-proof fan blade. Background Art

[0002] An explosion-proof fan refers to a fan installed in an environment with explosive gas. It can work in such an environment without causing fire or explosion accidents. Current explosion-proof fans are usually made of special materials, such as aluminum alloy or stainless steel, to prevent flying debris or other dangerous situations during explosions. At the same time, the electrical equipment and capacitors inside the explosion-proof fan are all explosion-proof models to ensure explosion-proof safety.

[0003] At present, the fan blades on explosion-proof fans will produce eddy currents inside the fans. The eddy currents can easily reduce the stability of the fans during operation, and easily generate noise, and even cause collisions between the fan blades and the fan casing, generating sparks and causing danger. Therefore, we propose an explosion-proof fan blade. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides an explosion-proof fan blade, which has the advantages of conveniently reducing the eddy current generated inside the explosion-proof fan, and solves the problem of eddy current generation inside the fan.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of conveniently reducing the eddy current generated inside the explosion-proof fan, the utility model provides the following technical solution: an explosion-proof fan blade, including an explosion-proof fan output shaft, a fan blade is arranged on the explosion-proof fan output shaft, a baffle is arranged on the outer surface of the explosion-proof fan output shaft, the baffle is located behind the fan blade, and a protective cover is arranged on the outer surface of the fan blade, and the protective cover covers the explosion-proof fan, so as to reduce the eddy current generated inside the explosion-proof fan and improve the stability of the rotation of the fan blade.

[0008] As a preferred technical solution of the utility model, inner holes are opened inside the fan blade, and the inner holes are arranged in a curved array.

[0009] As a preferred technical solution of the present utility model, the inside of the fan blade is provided with external holes, and the external holes are arranged in a curved array. The external holes are located on the outside of the inner holes. The fan blade is driven to rotate by the output shaft of the explosion-proof fan. At this time, vortices are generated in the protective cover, and at this time, the reverse airflow passes through the inner holes arranged in a curved array and the inner cavity of the outer holes to reduce the vortex, thereby facilitating the reduction of the vortex generated inside the explosion-proof fan, and further improving the stability of the fan blade rotation.

[0010] As a preferred technical solution of the utility model, the baffle is made of aluminum alloy material to prevent flying fragments or other dangerous situations from occurring during explosion.

[0011] As a preferred technical solution of the present invention, a fixing hole is provided in the middle of the baffle, and the inner cavity wall of the fixing hole is fixedly connected to the outer surface of the output shaft of the explosion-proof fan. A diffusion hole is provided in the interior of the baffle, and the diffusion hole is located on the outside of the fixing hole. The diffusion holes are arranged in a radial circular array, and the fan blades are driven to rotate by the output shaft of the explosion-proof fan. At this time, vortices will be generated in the protective cover, and the baffle can reduce the mixing of the airflow behind the fan blades, and the diffusion holes allow the gas to flow through the baffle, reduce the obstruction of the baffle to the airflow velocity, and lead the airflow out. At the same time, the diffusion holes can enhance the mixing of the airflow, make the speed and direction of the airflow more uniform, so as to reduce the generation of vortices, thereby facilitating the reduction of the vortices generated inside the explosion-proof fan, and further improving the stability of the rotation of the fan blades.

[0012] As a preferred technical solution of the utility model, the protective cover is made of stainless steel material to prevent flying fragments or other dangerous situations from occurring during explosion.

[0013] As a preferred technical solution of the utility model, the protective cover includes a hollow cover, the inner cavity of the hollow cover is movably connected to the outer surface of the fan blade, a connecting plate is fixedly installed on the inner cavity wall of one end of the hollow cover, and a protective ring is fixedly installed on the outer surface of the connecting plate. By arranging the protective cover on the outer surface of the fan blade, when the fan blade rotates, the hollow cover can block the lateral airflow and prevent people from contacting the rotating fan blade. At the same time, the connecting plate and the protective ring prevent foreign objects from invading the hollow cover, thereby facilitating the protection of the fan blade.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides an explosion-proof fan blade, which has the following beneficial effects:

[0016] 1. The explosion-proof fan blades are driven to rotate by the explosion-proof fan output shaft. At this time, vortices are generated in the protective cover, and the reverse airflow passes through the inner holes and the outer hole cavities arranged in a curved array to reduce the vortices. At the same time, the baffles can reduce the mixing of the airflow behind the blades, and the diffusion holes allow the gas to flow through the baffles, reduce the obstruction of the baffles to the airflow velocity, and lead the airflow out. At the same time, the diffusion holes can enhance the mixing of the airflow, make the speed and direction of the airflow more uniform, so as to reduce the generation of vortices, thereby facilitating the reduction of the vortices generated inside the explosion-proof fan, and further improving the stability of the rotation of the blades.

[0017] 2. The explosion-proof fan blade has a protective cover on the outer surface of the blade. When the blade rotates, the hollow cover can block the lateral airflow and prevent people from contacting the rotating blade. At the same time, the connecting plate and the protective ring prevent foreign matter from invading the hollow cover, thereby facilitating the protection of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a main stereoscopic view of the utility model;

[0019] Figure 2 This is a three-dimensional diagram of the connection between the output shaft and the fan blade of the utility model;

[0020] Figure 3 This is a three-dimensional diagram of the baffle of the utility model;

[0021] Figure 4 It is a three-dimensional diagram of the protective cover of the utility model.

[0022] In the figure: 1. explosion-proof fan output shaft; 2. fan blades; 21. inner hole; 22. outer hole; 3. baffle; 31. fixing hole; 32. dissipation hole; 4. protective cover; 41. hollow cover; 42. protective ring; 43. connecting plate. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] Example 1

[0025] Reference Figure 1-3 , which is the first embodiment of the utility model, provides an explosion-proof fan blade, including an explosion-proof fan output shaft 1, on which a fan blade 2 is arranged, and on the outer surface of the explosion-proof fan output shaft 1, a baffle 3 is arranged, the baffle 3 is located behind the fan blade 2, and on the outer surface of the fan blade 2, a protective cover 4 is arranged, which covers the explosion-proof fan.

[0026] The fan blade 2 has inner holes 21 formed inside, and the inner holes 21 are arranged in a curved array.

[0027] The fan blade 2 has outer holes 22 formed inside. The outer holes 22 are arranged in a curved array. The outer holes 22 are located outside the inner holes 21 .

[0028] The baffle 3 is made of aluminum alloy material.

[0029] A fixing hole 31 is provided in the middle of the baffle 3, and the inner wall of the fixing hole 31 is fixedly connected to the outer surface of the explosion-proof fan output shaft 1. A diffusion hole 32 is provided inside the baffle 3, and the diffusion hole 32 is located outside the fixing hole 31, and the diffusion holes 32 are arranged in a radial circular array.

[0030] During use, the fan blades 2 are driven to rotate by the explosion-proof fan output shaft 1, and vortices are generated in the protective cover 4. At this time, the reverse airflow passes through the inner holes 21 and the outer holes 22 arranged in a curved array to reduce the vortices. At the same time, the baffle 3 can reduce the mixing of the airflow behind the fan blades 2, and the diffusion holes 32 allow the gas to flow through the baffle 3, reduce the obstruction of the baffle 3 to the airflow velocity, and lead the airflow out. At the same time, the diffusion holes 32 can enhance the mixing of the airflow, make the speed and direction of the airflow more uniform, so as to reduce the generation of vortices, thereby facilitating the reduction of the vortices generated inside the explosion-proof fan, and further improving the stability of the rotation of the fan blades 2.

[0031] Example 2

[0032] Reference Figure 1-4 , which is the second embodiment of the utility model. This embodiment is different from the first embodiment in that the protective cover 4 is made of stainless steel.

[0033] The protective cover 4 includes a hollow cover 41 , the inner cavity of the hollow cover 41 is movably connected to the outer surface of the fan blade 2 , a connecting plate 43 is fixedly installed on the inner cavity wall of one end of the hollow cover 41 , and a protective ring 42 is fixedly installed on the outer surface of the connecting plate 43 .

[0034] During use, by setting a protective cover 4 on the outer surface of the fan blade 2, when the fan blade 2 rotates, the hollow cover 41 can block the lateral airflow and prevent people from contacting the rotating fan blade 2. At the same time, the connecting plate 43 and the protective ring 42 prevent foreign matter from invading the hollow cover 41, thereby facilitating the protection of the fan blade 2.

[0035] The remaining structures are the same as those of Example 1.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An explosion-proof fan blade, comprising an explosion-proof fan output shaft (1), wherein a fan blade (2) is arranged on the explosion-proof fan output shaft (1), characterized in that: A baffle (3) is provided on the outer surface of the explosion-proof fan output shaft (1), and the baffle (3) is located behind the fan blade (2). A protective cover (4) is provided on the outer surface of the fan blade (2), and the protective cover (4) covers the explosion-proof fan.

2. The explosion-proof fan blade according to claim 1, characterized in that: The fan blade (2) is provided with inner holes (21) inside, and the inner holes (21) are arranged in a curved array.

3. The explosion-proof fan blade according to claim 2, characterized in that: The fan blade (2) is provided with external holes (22) inside, the external holes (22) are arranged in a curved array, and the external holes (22) are located outside the internal holes (21).

4. The explosion-proof fan blade according to claim 1, characterized in that: The baffle (3) is made of aluminum alloy material.

5. The explosion-proof fan blade according to claim 4, characterized in that: A fixing hole (31) is provided in the middle of the baffle (3); an inner wall of the fixing hole (31) is fixedly connected to the outer surface of the explosion-proof fan output shaft (1); and a diffusion hole (32) is provided inside the baffle (3); the diffusion hole (32) is located outside the fixing hole (31); and the diffusion holes (32) are arranged in a radial circular array.

6. The explosion-proof fan blade according to claim 1, characterized in that: The protective cover (4) is made of stainless steel.

7. The explosion-proof fan blade according to claim 6, characterized in that: The protective cover (4) comprises a hollow cover (41), the inner cavity of the hollow cover (41) being movably connected to the outer surface of the fan blade (2), a connecting plate (43) being fixedly mounted on the inner cavity wall of one end of the hollow cover (41), and a protective ring (42) being fixedly mounted on the outer surface of the connecting plate (43).

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