Axial flow fan

Abstract

The utility model discloses an axial flow fan which comprises a supporting frame, an air duct, a front protective net, a rear protective net, a motor and fan blades, the air duct is installed on the supporting frame, the front protective net and the rear protective net are installed at the two ends of the air duct respectively, the size of the front protective net and the size of the rear protective net are matched with the inner diameter of the air duct, the fan blades are rotatably installed in the air duct, and the motor is installed in the air duct and used for driving the fan blades to rotate. The fan blades and the motor are positioned between the front protective net and the rear protective net; the fan blade comprises a blade support and a plurality of blades mounted on the blade support, the blades are evenly spaced, one end of each blade is detachably and fixedly connected with the blade support, first reinforcing ribs are arranged on the blades in a protruding mode and are in an arc shape, the rotating axes of the blades are located in the center of the blade support, and the axes of the first reinforcing ribs are located on the rotating axes of the blades. The scheme is simple in structure, high in production efficiency and low in cost; due to the arrangement of the front protective net and the rear protective net, the safety performance is high when the fan is used; the first reinforcing ribs are arranged on the side faces of the blades so that strength can be improved, and the blades are not prone to shaking when the fan runs and stops.

Description

Technical Field

[0001] The utility model belongs to the technical field of glass curtain wall installation, and particularly relates to an axial flow fan. Background Art

[0002] At present, the axial flow fan is an industrial axial flow fan. Most of the blade support bushings of the axial flow fans on the market are riveted or welded. The production efficiency of the blades with this structure is low and the cost is high. The support frame of the axial flow fan is usually connected by flat iron, and the large shaking occurs when the fan runs and stops due to insufficient strength.

[0003] Therefore, a new technology is needed to solve the problems of low production efficiency and easy shaking of the axial flow fan in the prior art. Summary of the Utility Model

[0004] To solve the above problems in the prior art, the utility model provides an axial flow fan, which has the effects of high production efficiency and not easy to shake during use.

[0005] The utility model adopts the following technical solutions:

[0006] An axial flow fan, comprising a support frame, a wind cylinder, a front protection net, a rear protection net, a motor and blades. The wind cylinder is installed on the support frame. The front protection net and the rear protection net are respectively installed at both ends of the wind cylinder and their sizes are adapted to the inner diameter of the wind cylinder. The blades are rotatably installed in the wind cylinder. The motor is installed in the wind cylinder and is used to drive the blades to rotate. Both the blades and the motor are located between the front protection net and the rear protection net;

[0007] The blades include a blade support and a plurality of blades installed on the blade support. The blades are evenly spaced. One end of each blade is detachably fixed to the blade support. The blade is convexly provided with a first reinforcing rib, and the first reinforcing rib is arc-shaped. The rotation axis of the blade is located at the center of the blade support, and the axis of the first reinforcing rib is located on the rotation axis of the blade.

[0008] As a further improvement of the technical solution of the utility model, the blade support includes a rotating plate and connecting plates corresponding to the blades one by one. One end of each connecting plate is fixedly connected to the rotating plate, and the other end is detachably fixed to a blade. A shaft sleeve is provided at the center of the rotating plate. The motor is provided with an output shaft. The shaft sleeve is fixed on the output shaft and rotates synchronously with the output shaft. The rotating plate and the shaft sleeve can rotate synchronously, and the axis of the output shaft coincides with the axis of the wind cylinder.

[0009] As a further improvement of the technical solution of the present utility model, it further includes a mounting seat. The mounting seat includes a sleeve and a mounting bracket for fixing the sleeve. The mounting bracket is detachably and fixedly connected to the inner wall of the air duct. The motor is installed in the sleeve, and the output shaft protrudes from one end of the sleeve close to the front protective net.

[0010] As a further improvement of the technical solution of the present utility model, the mounting bracket includes a number of connecting bodies evenly spaced. One end of each connecting body is connected to the inner wall of the air duct, and the other end is connected to the outer side of the sleeve.

[0011] As a further improvement of the technical solution of the present utility model, it further includes an electrical box and a switch. The electrical box is installed in the air duct and is located between the mounting seat and the rear protective net. The input end of the electrical box is electrically connected to the switch, and the output end is electrically connected to the motor. The switch is installed on the outer side of the air duct.

[0012] As a further improvement of the technical solution of the present utility model, a handle is provided on the outer side of the air duct, and the handle is located at the uppermost end of the outer surface of the air duct.

[0013] As a further improvement of the technical solution of the present utility model, the support frame includes two symmetrically arranged footrests. The footrests are in an A shape, and the upper ends of the footrests are detachably and fixedly connected to the outer side of the air duct.

[0014] As a further improvement of the technical solution of the present utility model, the footrest includes a first support rod, a second support rod and a third support rod. The upper ends of the first support rod and the second support rod are fixedly connected. There is an included angle between the first support rod and the second support rod and they are symmetrically arranged. The third support rod is horizontally arranged and its two ends are respectively connected to the first support rod and the second support rod;

[0015] The support frame further includes two connecting rods. One end of one connecting rod is detachably and fixedly connected to the corresponding two first support rods, and the other end of the other connecting rod is detachably and fixedly connected to the corresponding two second support rods.

[0016] As a further improvement of the technical solution of the present utility model, each footrest further includes a fixing plate, and the fixing plate is fixedly connected to the upper ends of the first support rod and the second support rod;

[0017] It further includes two cushion sleeves. One end of each cushion sleeve is provided with a square hole inside, and the other end is provided with a circular hole. The end of the cushion sleeve provided with the square hole is detachably and fixedly connected to the air duct, and the other end is rotatably and fixedly connected to one of the fixing plates.

[0018] Compared with the prior art, the beneficial effects of the present utility model are:

[0019] The axial flow fan has a simple structure, high production efficiency and low cost. The front protection net and the rear protection net are provided, which makes the fan have high safety performance during use. The blades inside the air duct are formed by stamping high-quality steel plates, with high production efficiency and low cost. The first reinforcing ribs are arranged on the side of the blades, which can increase the strength of the blades, and the blades are not easy to shake when the fan is running or stopped. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following further details the technology of the present utility model in conjunction with the drawings and specific embodiments:

[0021] Figure 1 is an exploded view of the overall structure of the present utility model;

[0022] Figure 2 is a schematic diagram of the overall structure of the present utility model;

[0023] Figure 3 is a schematic diagram of the structure of the wind blade;

[0024] Figure 4 is a schematic diagram of the structure of the cushion sleeve;

[0025] Figure 5 is an exploded view of a partial structure of the support frame;

[0026] Figure 6 is a schematic diagram of the structure of the connecting rod;

[0027] Figure 7 is a schematic diagram of the structure of the air duct.

[0028] Reference numerals:

[0029] 1 - support frame; 11 - footrest; 111 - first support rod; 1111 - connection hole; 1112 - through hole; 112 - second support rod; 113 - third support rod; 114 - fixing plate; 1141 - through hole; 12 - connecting rod; 121 - threaded hole;

[0030] 2 - air duct; 21 - handle; 22 - rounded flange; 23 - square bolt mounting hole;

[0031] 3 - motor; 31 - output shaft;

[0032] 4 - wind blade; 41 - blade holder; 411 - rotating plate; 412 - bushing; 413 - connecting plate; 414 - second reinforcing rib; 42 - blade; 421 - first reinforcing rib;

[0033] 5 - mounting seat; 51 - sleeve; 52 - mounting bracket; 521 - connecting body;

[0034] 6 - cushion sleeve; 61 - square hole; 62 - circular hole;

[0035] 7 - Front protection net;

[0036] 8 - Rear protection net;

[0037] 9 - Electrical box;

[0038] 10 - Switch. Specific embodiments

[0039] The following will clearly and completely describe the concept, specific structure and technical effects generated by the present utility model in combination with the embodiments and the drawings, so as to fully understand the purpose, scheme and effects of the present utility model. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The same reference numerals used everywhere in the drawings indicate the same or similar parts.

[0040] It should be noted that, unless otherwise specified, when a certain feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to another feature, or indirectly fixed or connected to another feature. In addition, the upper, lower, left, right, etc. descriptions used in the present utility model are only relative to the mutual positional relationship of the components of the present utility model in the drawings.

[0041] Referring to Figures 1 to 7 , an axial flow fan includes a support frame 1, a wind cylinder 2, a front protection net 7, a rear protection net 8, a motor 3 and a wind blade 4. The wind cylinder 2 is rotatably and fixedly installed on the support frame 1. The front protection net 7 and the rear protection net 8 are respectively installed at both ends of the wind cylinder 2 and their sizes are adapted to the inner diameter of the wind cylinder 2. The front protection net 7 and the rear protection net 8 can be fixed inside both ends of the wind cylinder 2 by screws, which can avoid damage to the front and rear protection nets 8. The wind blade 4 is rotatably installed inside the wind cylinder 2. The motor 3 is installed inside the wind cylinder 2 and is used to drive the wind blade 4 to rotate. Starting the motor 3 can drive the wind blade 4 to rotate. The wind blade 4 and the motor 3 are both located between the front protection net 7 and the rear protection net 8. The settings of the front protection net 7 and the rear protection net 8 make the fan have a high safety performance during use. Among them, the wind cylinder 2 is formed by expanding and rounding high-quality steel plates. The front and rear end faces of the wind cylinder 2 are arc-shaped or have rounded flanges 22, which can increase the strength of the wind cylinder 2, and the periphery of the wind cylinder 2 is smooth, which can prevent the contact person from being scratched. Square bolt mounting holes 23 are symmetrically opened on the left and right sides of the outside of the wind cylinder 2. The square neck of the square neck bolt can be embedded in the square bolt mounting hole 23. The square bolt mounting hole 23 can clamp the bolt to prevent the bolt from rotating. The wind cylinder 2 is fixedly connected to the spacer sleeve 6 through a square neck bolt, and the other end of the spacer sleeve 6 is detachably and fixedly connected to the A-shaped tripod 11. The connection between the square neck bolt and the wind cylinder 2 does not need to be welded and fixed, and the transportation process will not cause damage to the screw threads.

[0042] The wind blade 4 includes a blade holder 41 and a plurality of blades 42 mounted on the blade holder 41. The blades 42 are evenly spaced. One end of each blade 42 is detachably and fixedly connected to the blade holder 41. A first reinforcing rib 421 protrudes from the blade 42. The first reinforcing rib 421 is arc-shaped. The rotation axis of the blade 42 is located at the center of the blade holder 41, and the axis of the first reinforcing rib 421 is located on the rotation axis of the blade 42. The blade 42 is formed by stamping high-quality steel plates, with high production efficiency and low cost. And the first reinforcing rib 421 provided on the side of the blade 42 can increase the strength of the blade 42. The wind blade 4 is designed in a streamline shape, having many advantages such as large air volume, high wind pressure, good dynamic balance effect, and low noise.

[0043] Specifically, the blade holder 41 includes a rotating plate 411 and connecting plates 413 corresponding to each blade 42 one by one. Second reinforcing ribs 414 protrude from the sides of the rotating plate 411 and the connecting plates 413 to strengthen the structural strength of the rotating plate 411 and the connecting plates 413. One end of each connecting plate 413 is fixedly connected to the rotating plate 411, and the other end is detachably and fixedly connected to a blade 42. A shaft sleeve 412 is provided at the center of the rotating plate 411. The motor 3 is provided with an output shaft 31. The shaft sleeve 412 is fixed on the output shaft 31 and rotates synchronously with the output shaft 31. The rotating plate 411 and the shaft sleeve 412 can rotate synchronously. The axis of the output shaft 31 coincides with the axis of the air duct 2. The shaft sleeve 412, the rotating plate 411 of the blade holder 41 and each connecting plate 413 are of an integrally formed structure. When manufacturing, high-quality steel plates are used for stamping. The blade holder 41 and the shaft sleeve 412 are formed by integral stamping and stretching, which can save the processing cost of the shaft sleeve 412.

[0044] Specifically, the axial flow fan of this solution further includes a mounting seat 5. The mounting seat 5 can be used to fix the motor 3. The mounting seat 5 includes a sleeve 51 and a mounting frame 52 for fixing the sleeve 51. The outer edge of the mounting frame 52 is detachably and fixedly connected to the inner wall of the air duct 2. The sleeve 51 is fixed at the center of the mounting frame 52. The motor 3 is installed in the sleeve 51, and the output shaft 31 protrudes from one end of the sleeve 51 close to the front protective net 7. Among them, the axis of the sleeve 51, the axis of the output shaft 31 of the motor 3 and the axis of the air duct 2 can coincide.

[0045] Specifically, the mounting frame 52 includes a plurality of connecting bodies 521 evenly spaced. One end of each connecting body 521 is connected to the inner wall of the air duct 2, and the other end is connected to the outside of the sleeve 51.

[0046] Specifically, the axial flow fan of this solution further includes an electrical box 9 and a switch 10. The electrical box 9 is fixedly installed in the air duct 2 by screws, and the electrical box is located between the mounting seat 5 and the rear protective net 8. The input end of the electrical box 9 is electrically connected to the switch 10, and the output end is electrically connected to the motor 3. The switch 10 is installed on the outer side of the air duct 2. Among them, in order to control the start and stop of the axial flow fan of this solution, the circuit connection principle of the switch 10 and other circuit components electrically connected to the motor 3 can adopt a conventional setting. The electrical box 9 is provided with a receiving groove that can accommodate circuit components or cover the outside of the circuit components. The opening of the receiving groove faces the inner wall of the air duct 2, and there are holes on the side of the receiving groove for the power cord to pass through. One end of the switch 10 is installed inside the electrical box 9, and the other end passes through the opening on the air duct 2 and is exposed outside the air duct 2.

[0047] Specifically, a handle 21 is provided on the outer side of the air duct 2, and the handle 21 is located at the uppermost end of the outer surface of the air duct 2.

[0048] Specifically, the support frame 1 includes two symmetrically arranged leg frames 11. The leg frames 11 are in an A shape, and the upper ends of the leg frames 11 are detachably and fixedly connected to the outer side of the air duct 2.

[0049] Specifically, the leg frame 11 includes a first support rod 111, a second support rod 112, and a third support rod 113. The upper ends of the first support rod 111 and the second support rod 112 are fixedly connected. The first support rod 111 and the second support rod 112 are of an integral structure, and the connecting structure of the first support rod 111 and the second support rod 112 is formed by bending a high-quality steel pipe. There is an included angle between the first support rod 111 and the second support rod 112 and they are symmetrically arranged. The third support rod 113 is horizontally arranged and its two ends are respectively connected to the first support rod 111 and the second support rod 112. The mutually connected first support rod 111 and second support rod 112 are formed by bending a whole high-quality steel pipe, and the upper end of the A-shaped leg frame 11 is used to connect to the air duct 2.

[0050] The support frame 1 further includes two connecting rods 12. The two ends of one connecting rod 12 are respectively detachably and fixedly connected to two correspondingly arranged first support rods 111, and the two ends of the other connecting rod 12 are respectively detachably and fixedly connected to two correspondingly arranged second support rods 112. Wherein, the connecting rod 12 is tubular, and the connecting rod 12 is formed by stretching high-quality steel plates. Through holes 1112 are provided on the sides of the two first support rods 111 away from each other and on the sides of the two second support rods 112 away from each other, and connecting holes 1111 are provided on the sides of the two first support rods 111 close to each other and on the sides of the two second support rods 112 close to each other. The through holes 1112 communicate with the connecting holes 1111. Threaded holes 121 are provided at both ends of the connecting rod 12. The outer diameter of the connecting rod 12 is adapted to the diameter of the connecting holes 1111. The two ends of the connecting rod 12 can be inserted into two relatively arranged connecting holes 1111, and the ends of the connecting rod 12 can be fixed in the connecting holes 1111 by screws. The connecting rod 12 is formed by stretching and can be directly tapped with screw threads, thereby reducing the process of welding nuts, saving time, and improving production efficiency. In addition, during installation, the two ends of the connecting rod 12 are respectively inserted into two opposite connecting holes 1111, and one end of the screw passes through the through hole 1112 and is screwed into the threaded hole 121, so that the connecting rod 12 can be connected to the two legs 11 at both ends by screws. The disassembly and assembly are simple, convenient, and fast.

[0051] Specifically, each leg 11 further includes a fixing plate 114. The fixing plate 114 is fixedly connected to the upper ends of the first support rod 111 and the second support rod 112. The leg 11 is connected to the air duct 2 through the fixing plate 114 on the leg 11.

[0052] The axial flow fan of this solution further includes two bushings 6. One end of the interior of each bushing 6 is provided with a square hole 61, and the other end is provided with a circular hole 62. One end of the square hole 61 in the bushing 6 is detachably and fixedly connected to the air duct 2 through a square neck bolt, and the other end is rotatably and fixedly connected to a fixing plate 114. The square hole 61 at one end of the bushing 6 matches the square neck of the square neck bolt, and there will be no looseness when adjusting the pitching angle. The bushing 6 and the air duct 2 are fixed by a square neck bolt. When it is necessary to adjust the pitching angle of the air duct 2, the air duct 2 can be rotated slightly by force or the nut of the square neck bolt can be loosened and then the air duct 2 can be rotated. The air duct 2 and the bushing 6 can rotate relative to the fixing plate 114 synchronously. After the pitching angle of the air duct 2 is adjusted to be appropriate, the nut is tightened. The bushing 6 is formed by high-quality powder metallurgy die casting. The two ends of the bushing 6 are respectively connected to the A-shaped leg 11 and the air duct 2 through bolts. During installation, a part of the square neck of the square neck bolt is located in the square bolt mounting hole 23 on the air duct 2, and the other part is located in the square hole 61. The threaded section on the square neck bolt can pass through the circular hole 62 and extend out from the through hole 1141 corresponding to the circular hole 62 on the fixing plate 114. Tightening the nut on the threaded section can fix the air duct 2, the bushing 6 and the A-shaped leg 11.

[0053] For other contents of the axial flow fan described in the present utility model, reference may be made to the prior art and will not be elaborated herein.

[0054] The above are only the preferred embodiments of the present utility model and do not impose any formal limitations on the present utility model. Therefore, any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An axial flow fan, characterized in that: It includes a support frame, an air duct, a front protection net, a rear protection net, a motor and a wind blade. The air duct is installed on the support frame. The front protection net and the rear protection net are respectively installed at both ends of the air duct and their sizes are adapted to the inner diameter of the air duct. The wind blade is rotatably installed in the air duct. The motor is installed in the air duct and is used to drive the wind blade to rotate. Both the wind blade and the motor are located between the front protection net and the rear protection net; The wind blade includes a blade holder and a number of blades installed on the blade holder. The blades are evenly spaced. One end of each blade is detachably and fixedly connected to the blade holder. The blade is convexly provided with a first reinforcing rib. The first reinforcing rib is arc-shaped. The rotation axis of the blade is located at the center of the blade holder. The axis of the first reinforcing rib is located on the rotation axis of the blade.

2. The axial flow fan according to claim 1, wherein: The blade holder includes a rotating plate and connecting plates corresponding to each blade one by one. One end of each connecting plate is fixedly connected to the rotating plate, and the other end is detachably and fixedly connected to a blade. A shaft sleeve is provided at the center of the rotating plate. The motor is provided with an output shaft. The shaft sleeve is fixed on the output shaft and rotates synchronously with the output shaft. The rotating plate and the shaft sleeve can rotate synchronously. The axis of the output shaft coincides with the axis of the air duct.

3. The axial flow fan according to claim 2, wherein: It further includes a mounting seat. The mounting seat includes a sleeve and a mounting frame for fixing the sleeve. The mounting frame is detachably and fixedly connected to the inner wall of the air duct. The motor is installed in the sleeve. The output shaft protrudes from one end of the sleeve close to the front protection net.

4. The axial flow fan according to claim 3, wherein: The mounting frame includes a number of connecting bodies evenly spaced. One end of each connecting body is connected to the inner wall of the air duct, and the other end is connected to the outer side of the sleeve.

5. The axial flow fan according to claim 1, characterized in that: It further includes an electrical box and a switch. The electrical box is installed in the air duct and is located between the mounting seat and the rear protection net. The input end of the electrical box is electrically connected to the switch, and the output end is electrically connected to the motor. The switch is installed on the outer side of the air duct.

6. The axial flow fan according to claim 3, wherein: A handle is provided on the outer side of the air duct. The handle is located at the uppermost end of the outer surface of the air duct.

7. The axial flow fan according to claim 3, characterized in that: The support frame includes two symmetrically arranged leg frames. The leg frames are in an A shape. The upper ends of the leg frames are detachably and fixedly connected to the outer side of the air duct.

8. The axial flow fan according to claim 7, wherein: The leg frame includes a first support rod, a second support rod and a third support rod. The upper ends of the first support rod and the second support rod are fixedly connected. There is an angle between the first support rod and the second support rod and they are symmetrically arranged. The third support rod is horizontally arranged and its two ends are respectively connected to the first support rod and the second support rod; The support frame further includes two connecting rods. One end of one connecting rod is respectively detachably and fixedly connected to the corresponding two first support rods, and the other end of the other connecting rod is respectively detachably and fixedly connected to the corresponding two second support rods.

9. The axial flow fan according to claim 8, characterized in that: Each leg frame further includes a fixing plate. The fixing plate is fixedly connected to the upper ends of the first support rod and the second support rod; It further includes two cushion sleeves. One end inside each cushion sleeve is provided with a square hole, and the other end is provided with a circular hole. The end of the cushion sleeve provided with the square hole is detachably and fixedly connected to the air duct, and the other end is rotatably and fixedly connected to one of the fixing plates.

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