Anti-corrosion centrifugal fan

Abstract

The utility model discloses an anti-corrosion centrifugal fan which comprises a shell, a machine frame is arranged at the rear end of the shell, a motor is arranged on the upper end face of the machine frame, the output end of the motor penetrates through the shell and is fixedly provided with a connecting disc, a plurality of strip-shaped blocks are arranged on the outer wall of the connecting disc, and inserting grooves are formed in the outer walls of the strip-shaped blocks. Inserting grooves are formed in the strip-shaped blocks, inserting blocks are slidably arranged in the inserting grooves, blades are fixedly arranged on the outer walls of the inserting blocks, threaded holes are correspondingly formed in the outer walls of the strip-shaped blocks and the outer walls of the inserting blocks, connecting screws are arranged in the threaded holes, screwing blocks are arranged at one ends of the connecting screws, and anti-corrosion layers are arranged on the outer walls of the blades. Therefore, by arranging the anti-corrosion layer on the outer wall of the blade, the anti-corrosion capacity of the blade can be improved, the service life of the blade is prolonged, a user can disassemble the blade by disassembling the connecting screws, and replacement is convenient.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology, and more specifically, to a corrosion-resistant centrifugal fan. Background Technology

[0002] Centrifugal fans are machines that rely on input to increase gas pressure and discharge gas. They are a type of driven device. Centrifugal fans are widely used in factories, mines, vehicles, ships, and buildings for ventilation, dust removal, and cooling; boilers and industrial furnaces for ventilation and induced draft; household appliances for cooling and ventilation; grain drying and conveying; wind tunnel air sources; and hovercraft inflation and propulsion. Centrifugal fans mainly use a high-speed rotating impeller to accelerate gas, then decelerate and change its flow direction, converting kinetic energy into potential energy. They are mainly composed of a casing, main shaft, impeller, bearings, transmission mechanism, and motor. The casing is generally made of stainless steel, thus providing a certain degree of corrosion resistance.

[0003] Existing centrifugal fans sometimes need to transport corrosive gases, but because the blades do not have a corrosion-resistant structure, prolonged use will have a certain impact on the service life of the centrifugal fan and increase the operating cost.

[0004] Furthermore, most existing centrifugal fans have fixed air inlet ducts, which makes them unsuitable for connecting to equipment in different locations, thus affecting the flexibility of the device during use. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a corrosion-resistant centrifugal fan to solve the problem mentioned in the background art that when existing centrifugal fans are used, they sometimes need to transport corrosive gases, but because the blades do not have a corrosion-resistant structure, long-term use will cause certain technical problems to the service life of the centrifugal fan.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant centrifugal fan, comprising a housing, a frame at the rear end of the housing, a motor on the upper surface of the frame, an output end of the motor passing through the housing and fixedly mounted on a connecting plate, strip-shaped blocks on the outer wall of the connecting plate, multiple strip-shaped blocks having slots on their outer walls, inserts slidingly mounted inside the slots, blades fixedly mounted on the outer walls of the inserts, threaded holes correspondingly mounted on the outer walls of the strip-shaped blocks and inserts, connecting screws mounted inside the threaded holes, a tightening block at one end of each connecting screw, an anti-corrosion layer on the outer walls of each blade, an air inlet pipe fixedly mounted at the bottom of the housing, and an external connecting pipe at the other end of the air inlet pipe.

[0009] The present invention is further configured such that an installation sleeve is fixedly provided at the lower end of the outer pipe, the installation sleeve and the air inlet pipe are rotatably installed through a sealed bearing, a locking hole is provided on the outer wall of the installation sleeve, a locking screw is provided inside the locking hole, a rotating disk is fixedly provided at one end of the locking screw, and the locking screw is threadedly connected to the locking hole.

[0010] The present invention is further configured such that an anti-slip sleeve is provided on the outer wall of the air inlet pipe, and the other end of the locking screw abuts against the outer wall of the anti-slip sleeve.

[0011] The present invention is further configured such that a filter screen is provided at the other end of the outer tube, and sliding grooves are provided on both sides of the outer wall of the filter screen. Sliding blocks are slidably provided inside the sliding grooves, and a positioning pin is provided at one end of each sliding block. A positioning groove is correspondingly provided on the inner wall of the outer tube, and one end of each positioning pin is located inside the positioning groove.

[0012] The present invention is further configured such that a connecting spring is fixedly provided at the other end of the sliding block, and the other end of the connecting spring is fixedly connected to the inner wall of the sliding groove.

[0013] The present invention is further provided that a flange is provided on the outer wall of the outer pipe.

[0014] The present invention is further configured such that a protective cover is provided at the front end of the housing, the protective cover is fixedly installed to the housing by bolts, and the protective cover has an air vent.

[0015] The present invention is further provided that a base is fixedly provided at the bottom of the housing.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a corrosion-resistant centrifugal fan with the following advantages:

[0018] 1. By setting up a motor, connecting plate, blades, and connecting screws, and by setting an anti-corrosion layer on the outer wall of the blades, the corrosion resistance of the blades can be increased, thereby extending their service life. The anti-corrosion layer can be polytetrafluoroethylene coating or other anti-corrosion materials. Furthermore, users can disassemble the blades by removing the connecting screws for easy replacement, thereby reducing the operating cost of the device.

[0019] 2. By setting up an air inlet pipe, an external pipe, and a locking screw, the user can rotate the locking screw by rotating the rotating disc to disengage one end from the protective sleeve. At this time, the external pipe can be rotated by the action of the sealed bearing to adjust its connection direction. After adjustment, the locking screw can be tightened by rotating the disc, which increases the flexibility of the device during use.

[0020] 3. By setting up a filter screen, sliding block, positioning pin, and connecting spring, a filter screen can be installed inside the external pipe to filter out large particulate impurities in the conveyed gas, preventing them from entering the blower and affecting the service life of the device. In addition, the user can also move the sliding block to disengage the positioning pin from the positioning groove to disassemble the filter screen for easy cleaning. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a corrosion-resistant centrifugal fan in its unused state.

[0022] Figure 2 An exploded view showing the installation of strip blocks, inserts, blades, and connecting screws on the connecting plate;

[0023] Figure 3 This is a schematic diagram showing the location of the anti-corrosion layer on the blade;

[0024] Figure 4 A schematic diagram showing the positions of the upper frame, motor, air inlet pipe, and anti-slip sleeve on the casing;

[0025] Figure 5 Exploded view of the installation of the external pipe and filter screen;

[0026] Figure 6 An exploded view showing the installation of the sliding block, locating pin, and connecting spring on the filter screen.

[0027] In the diagram: 1. Housing; 2. Frame; 3. Motor; 4. Connecting plate; 5. Strip block; 6. Slot; 7. Insert block; 8. Blade; 9. Threaded hole; 10. Connecting screw; 11. Tightening block; 12. Anti-corrosion layer; 13. Air inlet pipe; 14. External pipe; 15. Mounting sleeve; 16. Locking hole; 17. Locking screw; 18. Rotating plate; 19. Anti-slip sleeve; 20. Filter screen; 21. Sliding groove; 22. Sliding block; 23. Positioning pin; 24. Positioning groove; 25. Connecting spring; 26. Flange; 27. Protective cover; 28. Air outlet; 29. ​​Base. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0031] Please see Figure 1-6 A corrosion-resistant centrifugal fan includes a housing 1, a frame 2 at the rear end of the housing 1, a motor 3 on the upper surface of the frame 2, the output end of the motor 3 passing through the housing 1 and fixedly mounted on a connecting plate 4, strip blocks 5 on the outer wall of the connecting plate 4, multiple strip blocks 5 having slots 6 on their outer walls, inserts 7 slidingly mounted inside the slots 6, blades 8 fixedly mounted on the outer walls of the inserts 7, threaded holes 9 correspondingly mounted on the outer walls of the strip blocks 5 and the inserts 7, connecting screws 10 mounted inside the threaded holes 9, a tightening block 11 at one end of each connecting screw 10, an anti-corrosion layer 12 on the outer wall of each blade 8, an air inlet pipe 13 fixedly mounted at the bottom of the housing 1, an outer pipe 14 at the other end of the air inlet pipe 13, and a flange 26 on the outer wall of the outer pipe 14.

[0032] In this embodiment, an installation sleeve 15 is fixedly provided at the lower end of the outer pipe 14. The installation sleeve 15 and the air inlet pipe 13 are rotatably installed through a sealed bearing. A locking hole 16 is provided on the outer wall of the installation sleeve 15. A locking screw 17 is provided inside the locking hole 16. A rotating disk 18 is fixedly provided at one end of the locking screw 17. The locking screw 17 is threadedly connected to the locking hole 16. An anti-slip sleeve 19 is provided on the outer wall of the air inlet pipe 13. The other end of the locking screw 17 abuts against the outer wall of the anti-slip sleeve 19.

[0033] More specifically, by setting an anti-corrosion layer 12 on the outer wall of the blade 8, the corrosion resistance of the blade 8 can be increased, thereby extending its service life. The anti-corrosion layer 12 can be a polytetrafluoroethylene coating or other anti-corrosion materials. Furthermore, the user can disassemble the blade 8 for easy replacement by removing the connecting screw 10. When it is necessary to adjust the installation angle, the locking screw 17 can be rotated by rotating the rotating disk 18 to disengage one end from the protective sleeve. At this time, the outer pipe 14 can be rotated by the action of the sealed bearing to adjust its connection direction. After adjustment, the locking screw 17 can be tightened by rotating the disk 18.

[0034] Please see Figure 1 and Figure 6 As an implementation method for blocking large particulate impurities in the air: a filter screen 20 is provided at the other end of the outer pipe 14. A sliding groove 21 is provided on the outer wall of the filter screen 20 on both sides. A sliding block 22 is slidably provided inside the sliding groove 21. A positioning pin 23 is provided at one end of each sliding block 22. A positioning groove 24 is correspondingly provided on the inner wall of the outer pipe 14. One end of each positioning pin 23 is located inside the positioning groove 24. A connecting spring 25 is fixedly provided at the other end of the sliding block 22. The other end of the connecting spring 25 is fixedly connected to the inner wall of the sliding groove 21.

[0035] Specifically, by installing a filter screen 20 inside the external pipe 14, large particulate impurities in the transported gas can be filtered to prevent them from entering the blower and affecting the service life of the device. In addition, the user can also move the sliding block 22 to disengage the positioning pin 23 from the positioning groove 24 to disassemble the filter screen 20 for easy cleaning.

[0036] Please refer to Figure 1 As a further implementation method to protect the blade 8 and increase safety performance: a protective cover 27 is provided at the front end of the housing 1, the protective cover 27 is fixedly installed with the housing 1 by bolts, the protective cover 27 is provided with an air outlet 28, and a base 29 is fixedly provided at the bottom of the housing 1.

[0037] Specifically, blade 8 can be shielded to prevent accidental contact by personnel.

[0038] In summary, when using the entire device: the user can connect the external pipe 14 to the equipment requiring air delivery, then turn on the motor 3 to make the connecting plate 4 drive the blades 8 to rotate, thereby accelerating the gas discharge from the outlet 28. Furthermore, by installing a filter screen 20 inside the external pipe 14, large particulate impurities in the delivered gas can be filtered to prevent them from entering the blower and affecting the device's service life. The user can also move the sliding block 22 to disengage the positioning pin 23 from the positioning groove 24 to disassemble the filter screen 20 for easy cleaning. When the external pipe angle needs adjustment, it can be adjusted by rotating the rotating disc 18. Rotate the locking screw 17 to disengage one end from the protective sleeve. At this point, the outer pipe 14 can be rotated by the action of the sealed bearing to adjust its connection direction. After adjustment, tighten the locking screw 17 by rotating the disc 18 to increase the flexibility of the device during use. By setting the anti-corrosion layer 12 on the outer wall of the blade 8, the corrosion resistance of the blade 8 can be increased to extend its service life. The anti-corrosion layer 12 can be a polytetrafluoroethylene coating or other anti-corrosion materials. Furthermore, the user can disassemble the blade 8 by removing the connecting screw 10 for easy replacement, thereby reducing the operating cost of the device.

[0039] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant centrifugal fan, comprising a casing (1), characterized in that: The rear end of the housing (1) is provided with a frame (2), and the upper end of the frame (2) is provided with a motor (3). The output end of the motor (3) passes through the housing (1) and is fixedly provided with a connecting plate (4). The outer wall of the connecting plate (4) is provided with a strip block (5). Multiple strip blocks (5) are provided and slots (6) are opened on their outer walls. Inserts (7) are slidably provided inside the slots (6). Blades (8) are fixedly provided on the outer walls of the inserts (7). Threaded holes (9) are correspondingly opened on the outer walls of the strip blocks (5) and the inserts (7). Connecting screws (10) are provided inside the threaded holes (9). One end of the connecting screws (10) is provided with a screwing block (11). The outer wall of the blades (8) is provided with an anti-corrosion layer (12). An air inlet pipe (13) is fixedly provided at the bottom of the housing (1). An external pipe (14) is provided at the other end of the air inlet pipe (13).

2. The corrosion-resistant centrifugal fan according to claim 1, characterized in that: The lower end of the outer pipe (14) is fixedly provided with an installation sleeve (15). The installation sleeve (15) and the air inlet pipe (13) are rotatably installed through a sealed bearing. A locking hole (16) is provided on the outer wall of the installation sleeve (15). A locking screw (17) is provided inside the locking hole (16). A rotating disk (18) is fixed at one end of the locking screw (17). The locking screw (17) is threadedly connected to the locking hole (16).

3. The corrosion-resistant centrifugal fan according to claim 2, characterized in that: The air inlet pipe (13) is provided with an anti-slip sleeve (19) on its outer wall, and the other end of the locking screw (17) abuts against the outer wall of the anti-slip sleeve (19).

4. The corrosion-resistant centrifugal fan according to claim 1, characterized in that: The other end of the outer pipe (14) is provided with a filter screen (20). The filter screen (20) has sliding grooves (21) on its outer wall and on both sides. Sliding blocks (22) are slidably provided inside the sliding grooves (21). One end of each sliding block (22) is provided with a positioning pin (23). The inner wall of the outer pipe (14) is provided with a corresponding positioning groove (24). One end of each positioning pin (23) is located inside the positioning groove (24).

5. A corrosion-resistant centrifugal fan according to claim 4, characterized in that: The other end of the sliding block (22) is fixedly provided with a connecting spring (25), and the other end of the connecting spring (25) is fixedly connected to the inner wall of the sliding groove (21).

6. A corrosion-resistant centrifugal fan according to claim 1, characterized in that: A flange (26) is provided on the outer wall of the external pipe (14).

7. A corrosion-resistant centrifugal fan according to claim 2, characterized in that: The front end of the housing (1) is provided with a protective cover (27), which is fixed to the housing (1) by bolts, and the protective cover (27) is provided with an air vent (28).

8. A corrosion-resistant centrifugal fan according to claim 1, characterized in that: The bottom of the housing (1) is fixedly provided with a base (29).

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