Low-noise explosion-proof axial flow fan

Abstract

The utility model discloses a low noise explosion -proof axial flow fan belongs to explosion -proof axial flow fan technical field, including explosion -proof air duct, the inner wall fixedly connected with flow fan body of explosion -proof air duct is provided with the air deflector of explosion -proof air duct, the air deflector and explosion -proof air duct are fixedly connected with the corrugated hose of mutual close one end, the top of corrugated hose is provided with the storage shell, the inside slide connection of storage shell has the L shape frame, and the inner wall screw thread connection of L shape frame has locking bolt. This low noise explosion -proof axial flow fan passes through the mutual cooperation of explosion -proof air duct, flow fan body, corrugated hose, air deflector, storage shell, L shape frame, locking bolt, second support threaded rod, first support threaded rod, fixed frame, first locking block, fixed cylinder, auxiliary bearing, vertical threaded rod, rotating frame, third locking block and second locking block, and rotating frame and vertical threaded rod can rotate left and right with auxiliary bearing inner race, and can be bended left and right with the cooperation of corrugated hose.

Description

Technical Field

[0001] This application belongs to the technical field of explosion-proof axial flow fans, and particularly relates to a low-noise explosion-proof axial flow fan. Background Technology

[0002] Explosion-proof axial flow fans are ventilation devices specifically designed for flammable and explosive environments. They achieve ventilation by using a motor to drive an impeller to make air flow axially. They employ explosion-proof motors, aluminum alloy impellers, and other explosion-proof components and explosion-proof structures to prevent spark leakage. They are characterized by explosion-proof reliability, high efficiency and energy saving, low noise and compact design. They are widely used in places with flammable gases or dust, such as petrochemical plants, coal mines, and hazardous materials storage facilities, to ensure ventilation while preventing explosions.

[0003] The existing utility model with authorization announcement number CN217842134U discloses an explosion-proof axial flow fan. This explosion-proof axial flow fan uses a cooling device installed inside a circular tube to reduce the temperature of the air entering the air inlet when the motor installed inside the circular tube is working, thereby lowering the temperature of the motor and preventing the ignition of flammable and explosive gases.

[0004] While the above technical solution can reduce the temperature of the air entering the air inlet, thereby lowering the temperature of the motor and improving the safety of the motor to some extent, it is inconvenient to adjust the direction of the air outlet. The lack of an air outlet direction adjustment structure makes it difficult to allow air to be discharged in different directions after the fan is placed, thus limiting the application scenarios of the fan.

[0005] Therefore, we propose a low-noise explosion-proof axial flow fan to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to solve the problem that the existing technology lacks an air outlet direction adjustment structure, which makes it inconvenient to outlet air in different directions after the fan is placed, thus limiting the application scenarios of the fan. Therefore, this invention proposes a low-noise explosion-proof axial flow fan.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A low-noise explosion-proof axial flow fan includes an explosion-proof duct. A fan body is fixedly connected to the inner wall of the explosion-proof duct. An air guide is provided on the outer side of the explosion-proof duct. A corrugated hose is fixedly connected to one end of the air guide and the explosion-proof duct, which are close to each other. A housing is provided above the corrugated hose. An L-shaped frame is slidably connected inside the housing. A locking bolt is threaded to the inner wall of the L-shaped frame. A fixing frame is fixedly connected to the outer surface of the air guide. A first supporting threaded rod is fixedly connected to the inner wall of the fixing frame. A first locking block is threaded to the outer surface of the first supporting threaded rod. A fixing cylinder is fixedly connected to the outer surface of the explosion-proof duct. An auxiliary bearing is fixedly connected to the inner wall of the fixing cylinder. A vertical threaded rod is fixedly connected to the inner ring of the auxiliary bearing. A second locking block is threaded to the outer surface of the vertical threaded rod. A rotating frame is fixedly connected to the top of the vertical threaded rod. A second supporting threaded rod is fixedly connected to the inner wall of the rotating frame. A third locking block is threaded to the outer surface of the second supporting threaded rod.

[0009] Preferably, the outer surface of the locking bolt is slidably connected to the interior of the storage shell, the outer surface of the first supporting threaded rod is rotatably connected to the inner wall of the L-shaped frame, the two sides of the L-shaped frame are respectively in contact with the right side of the first locking block and the inner side wall of the fixing frame, the bottom surface of the second locking block is in contact with the top of the fixing cylinder, the outer surface of the second supporting threaded rod is rotatably connected to the inner wall of the storage shell, the two sides of the storage shell are respectively in contact with the right side of the third locking block and the inner side wall of the rotating frame, and a counterweight base is fixedly connected to the outer surface of the explosion-proof air duct, and the upper surface of the counterweight base has several identical mounting holes.

[0010] Preferably, both the outer surface of the explosion-proof duct and the outer surface of the air guide duct are fixedly connected with assembly rings, and each assembly ring has several identical assembly holes on its front side.

[0011] Preferably, a handle support is fixedly connected to the outer surface of the explosion-proof duct, and a pull rod is fixedly connected to the inner wall of the handle support.

[0012] Preferably, the handle support is provided with a grip inside, and the inner wall of the grip is rotatably connected to the outer surface of the pull rod.

[0013] Preferably, a washer is fitted on the outer surface of the locking bolt, and the bottom surface of the washer is in contact with the upper surface of the housing.

[0014] In summary, the technical effects and advantages of this application are as follows:

[0015] Through the cooperation of the explosion-proof air duct, airflow body, corrugated hose, air guide tube, storage shell, L-shaped frame, locking bolt, second support threaded rod, first support threaded rod, fixing frame, first locking block, fixing cylinder, auxiliary bearing, vertical threaded rod, rotating frame, third locking block, and second locking block, the rotating frame and vertical threaded rod can rotate left and right with the inner ring of the auxiliary bearing. Combined with the corrugated hose, it can bend left and right. Tightening the second locking block tightens the fixing cylinder to fix the left and right orientation of the air guide tube. The L-shaped frame can surround... After the first support threaded rod rotates, it is locked by the first locking block. The housing can rotate around the second support threaded rod and is locked by the third locking block. The L-shaped frame can slide inside the housing and be locked by the locking bolt. This allows for adjustment of the pitch angle of the air guide tube, facilitating flexible adjustment of the air outlet direction of the fan and expanding the application scenarios of the entire fan. It avoids the problem that the lack of an air outlet direction adjustment structure makes it inconvenient to outlet air in different directions after the fan is placed, thus limiting the application scenarios of the entire fan. Attached Figure Description

[0016] Figure 1 This is a three-dimensional overall structural diagram of the low-noise explosion-proof axial flow fan of this utility model;

[0017] Figure 2 This is a cross-sectional three-dimensional structural diagram of the storage shell of this utility model;

[0018] Figure 3 This is a side-view perspective structural diagram of the corrugated hose of this utility model;

[0019] Figure 4 This is a side-view three-dimensional structural schematic diagram of the explosion-proof ventilation duct of this utility model;

[0020] Figure 5 This is a side-view three-dimensional structural schematic diagram of the rotating frame of this utility model.

[0021] In the diagram: 1. Explosion-proof air duct; 2. Airflow body; 3. Corrugated hose; 4. Air guide duct; 5. Storage shell; 6. L-shaped frame; 7. Locking bolt; 8. Second support threaded rod; 9. First support threaded rod; 10. Fixing frame; 11. Washer; 12. First locking block; 13. Fixing cylinder; 14. Auxiliary bearing; 15. Vertical threaded rod; 16. Rotating frame; 17. Third locking block; 18. Second locking block; 19. Counterweight base; 20. Mounting hole; 21. Assembly ring; 22. Assembly hole; 23. Handle support; 24. Pull rod; 25. Grip. Detailed Implementation

[0022] 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.

[0023] Reference Figure 1-5 A low-noise explosion-proof axial flow fan includes an explosion-proof duct 1, which has good explosion-proof effect. A fan body 2 is fixedly connected to the inner wall of the explosion-proof duct 1. The fan body 2 is based on existing mature technology and has an explosion-proof axial structure and a quiet operation. An air guide duct 4 is provided on the outer side of the explosion-proof duct 1. A corrugated hose 3 is fixedly connected to the near end of the air guide duct 4 and the explosion-proof duct 1. Both the corrugated hose 3 and the air guide duct 4 are lightweight. The connection between the corrugated hose 3 and the explosion-proof duct 1 and the air guide duct 4 has good air tightness. The corrugated hose 3 can be stretched and bent within a certain range. A storage shell 5 is provided on the top of the corrugated hose 3. A counterweight base 19 is fixedly connected to the outer surface of the explosion-proof duct 1. Several identical mounting holes 20 are opened on the upper surface of the counterweight base 19. By setting the mounting holes 20, the counterweight base 19 can be fixedly installed with external bolts and other fixing structures, thereby facilitating the fixation of the fan body 2.

[0024] An L-shaped frame 6 is slidably connected inside the housing 5. A locking bolt 7 is threadedly connected to the inner wall of the L-shaped frame 6. The outer surface of the locking bolt 7 is slidably connected to the inside of the housing 5. A fixing frame 10 is fixedly connected to the outer surface of the air duct 4. Assembly rings 21 are fixedly connected to the outer surfaces of the explosion-proof air duct 1 and the air duct 4. Several identical assembly holes 22 are opened on the front of each assembly ring 21. By setting the assembly holes 22, the assembly ring 21 can be connected to the external structure with external bolts and nuts, thereby facilitating the fixing of the explosion-proof air duct 1 and the air duct 4.

[0025] A first support threaded rod 9 is fixedly connected to the inner wall of the fixed frame 10. The outer surface of the first support threaded rod 9 is rotatably connected to the inner wall of the L-shaped frame 6. A first locking block 12 is threadedly connected to the outer surface of the first support threaded rod 9. The outer surface of the first locking block 12 has an anti-slip structure, and the side also has a good anti-slip effect. The two sides of the L-shaped frame 6 are in contact with the right side of the first locking block 12 and the inner side wall of the fixed frame 10, respectively. A fixed cylinder 13 is fixedly connected to the outer surface of the explosion-proof air duct 1. A handle support 23 is fixedly connected to the outer surface of the explosion-proof air duct 1. A pull rod 24 is fixedly connected to the inner wall of the handle support 23. By setting the pull rod 24, a rotation base surface can be provided for the hand grip structure inside the handle support 23, thereby increasing the flexibility of the hand grip structure. The handle support 23 and the pull rod 24 can work together with the above-mentioned hand grip structure to lift and transport the entire blower that is not fixed.

[0026] An auxiliary bearing 14 is fixedly connected to the inner wall of the fixed cylinder 13. A vertical threaded rod 15 is fixedly connected to the inner ring of the auxiliary bearing 14. A second locking block 18 is threadedly connected to the outer surface of the vertical threaded rod 15. The outer surface of the second locking block 18 has an anti-slip structure, and the side also has a good anti-slip effect. The bottom surface of the second locking block 18 is in contact with the top of the fixed cylinder 13. A handle 25 is provided inside the handle support 23. The inner wall of the handle 25 is rotatably connected to the outer surface of the pull rod 24. By providing the handle 25, it can rotate around the outer surface of the pull rod 24 inside the handle support 23. Then, by holding the handle 25, it is convenient to lift and move the entire blower that is not fixed.

[0027] A rotating frame 16 is fixedly connected to the top of the vertical threaded rod 15. A second supporting threaded rod 8 is fixedly connected to the inner wall of the rotating frame 16. The outer surface of the second supporting threaded rod 8 is rotatably connected to the inner wall of the storage shell 5. A third locking block 17 is threadedly connected to the outer surface of the second supporting threaded rod 8. The outer surface of the third locking block 17 has an anti-slip structure, and the side also has a good anti-slip effect. The two sides of the storage shell 5 are in contact with the right side of the third locking block 17 and the inner side wall of the rotating frame 16, respectively. A washer 11 is sleeved on the outer surface of the locking bolt 7. The bottom surface of the washer 11 is in contact with the upper surface of the storage shell 5. By setting the washer 11, it can be placed between the storage shell 5 and the locking bolt 7 and increase the contact area between the two, thereby increasing the locking effect of the locking bolt 7 on the storage shell 5 and the L-shaped frame 6.

[0028] The working principle of this utility model is as follows: When in use, the fan body 2 operates inside the explosion-proof duct 1, driving the air to flow axially and discharge from the air guide duct 4 through the corrugated hose 3, thereby achieving ventilation. The corrugated hose 3 is lightweight and flexible, and can maintain airflow continuity when the direction of the air guide duct 4 is adjusted. The airtightness of its connection with the explosion-proof duct 1 and the air guide duct 4 is good, avoiding gas leakage.

[0029] When the air outlet direction needs to be adjusted, the rotating frame 16 drives the vertical threaded rod 15 to rotate left and right under the action of the inner ring of the auxiliary bearing 14. At the same time, the corrugated hose 3 bends accordingly. After adjusting to the appropriate angle, the second locking block 18 is turned to tighten the fixing cylinder 13, thereby fixing the left and right orientation of the air duct 4. When adjusting the pitch angle, the L-shaped frame 6 can rotate around the first support threaded rod 9, and the housing 5 can rotate around the second support threaded rod 8. The L-shaped frame 6 can also slide inside the housing 5. After adjusting the position, the first locking block 12, the third locking block 17 and the locking bolt 7 are used to lock them respectively, thereby realizing the adjustment of the pitch angle of the air duct 4.

[0030] In addition, the mounting holes 20 on the counterweight base 19 can be used to fix the position of the fan with bolts. The assembly ring 21 and the assembly hole 22 facilitate docking and fixing with the external structure. The handle 25 can be rotated on the pull rod 24, making it convenient to move the fan. The washer 11 can increase the contact area between the locking bolt 7 and the storage shell 5, improving the locking effect. The design of the entire low-noise explosion-proof axial flow fan effectively solves the problem that the lack of an air outlet direction adjustment structure makes it inconvenient to vent air in different directions after the fan is placed, thus limiting the application scenarios of the entire fan.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-noise explosion-proof axial flow fan, comprising an explosion-proof duct (1), characterized in that: The inner wall of the explosion-proof duct (1) is fixedly connected to a fan body (2), and an air guide duct (4) is provided on the outer side of the explosion-proof duct (1). The air guide duct (4) and the explosion-proof duct (1) are connected together by a corrugated hose (3) at their respective ends. A storage shell (5) is provided above the corrugated hose (3). An L-shaped frame (6) is slidably connected inside the storage shell (5). A locking bolt (7) is threadedly connected to the inner wall of the L-shaped frame (6). A fixing frame (10) is fixedly connected to the outer surface of the air guide duct (4). A first support threaded rod (9) is fixedly connected to the inner wall of the fixing frame (10). 9) The outer surface of the explosion-proof duct (1) is threaded with a first locking block (12), the outer surface of the explosion-proof duct (1) is fixedly connected with a fixed cylinder (13), the inner wall of the fixed cylinder (13) is fixedly connected with an auxiliary bearing (14), the inner ring of the auxiliary bearing (14) is fixedly connected with a vertical threaded rod (15), the outer surface of the vertical threaded rod (15) is threaded with a second locking block (18), the top end of the vertical threaded rod (15) is fixedly connected with a rotating frame (16), the inner wall of the rotating frame (16) is fixedly connected with a second supporting threaded rod (8), and the outer surface of the second supporting threaded rod (8) is threaded with a third locking block (17).

2. The low-noise explosion-proof axial flow fan according to claim 1, characterized in that: The outer surface of the locking bolt (7) is slidably connected to the inside of the housing (5), the outer surface of the first supporting threaded rod (9) is rotatably connected to the inner wall of the L-shaped frame (6), the two sides of the L-shaped frame (6) are respectively in contact with the right side of the first locking block (12) and the inner side wall of the fixing frame (10), the bottom surface of the second locking block (18) is in contact with the top of the fixing cylinder (13), the outer surface of the second supporting threaded rod (8) is rotatably connected to the inner wall of the housing (5), the two sides of the housing (5) are respectively in contact with the right side of the third locking block (17) and the inner side wall of the rotating frame (16), and the outer surface of the explosion-proof duct (1) is fixedly connected to a counterweight base (19), and the upper surface of the counterweight base (19) is provided with several identical mounting holes (20).

3. The low-noise explosion-proof axial flow fan according to claim 1, characterized in that: The outer surface of the explosion-proof duct (1) and the outer surface of the air guide duct (4) are both fixedly connected with assembly rings (21), and each assembly ring (21) has several identical assembly holes (22) on its front side.

4. The low-noise explosion-proof axial flow fan according to claim 1, characterized in that: The outer surface of the explosion-proof duct (1) is fixedly connected to a handle support (23), and the inner wall of the handle support (23) is fixedly connected to a pull rod (24).

5. A low-noise explosion-proof axial flow fan according to claim 4, characterized in that: The handle support (23) is provided with a grip (25) inside, and the inner wall of the grip (25) is rotatably connected to the outer surface of the pull rod (24).

6. A low-noise explosion-proof axial flow fan according to claim 1, characterized in that: A washer (11) is fitted on the outer surface of the locking bolt (7), and the bottom surface of the washer (11) is in contact with the upper surface of the housing (5).

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