Combined induced draft fan

Abstract

The utility model relates to the technical field of air supply equipment, in particular to a combined type induced draft fan which comprises a bottom mounting frame, a first sliding frame and a second sliding frame are arranged on the bottom mounting frame, a driving motor is fixedly installed on the first sliding frame, a protective cover is fixedly installed on the second sliding frame, and a supporting frame is further arranged on the top of the first sliding frame. Structural connection between the driving motor and the protective cover is achieved by transversely moving the first sliding frame and the second sliding frame, meanwhile, fixing of the driving motor and the protective cover after movement is achieved by rotating a locking handle, after the protective cover is fixed, the position of the driving motor is adjusted again, and the position of the air inducing paddle in the protective cover is changed. Therefore, the air inducing effect of rotation of the air inducing paddles is changed, the optimal positions of the paddles are found, the fan can achieve higher efficiency during operation, energy waste is reduced, the air volume output of the induced draft fan can be accurately adjusted according to actual requirements, and the ventilation requirements under different working conditions are met.

Description

Technical Field

[0001] The utility model relates to the technical field of air supply equipment, in particular to a combined induced draft fan. Background Technique

[0002] An induced draft fan is a mechanical device that generates negative pressure through the rotation of an impeller, thereby extracting gas.

[0003] In industrial production, induced draft fans are commonly used in equipment such as boilers and kilns to discharge the exhaust gas generated by combustion, maintain a negative pressure environment in the furnace, ensure the normal progress of combustion, and improve combustion efficiency.

[0004] When the induced draft fan works, air is induced through the rotation of the impeller inside the induced draft fan. However, most of the impellers inside the induced draft fan are fixed inside the induced draft fan. The rotating shaft connected to the impeller is rotatably connected to the protective cover outside the impeller. The position of the impeller cannot be adjusted, and the effect of the negative pressure generated by the rotation of the impeller cannot be adjusted. The adjustability is poor, and there is room for improvement. Content of the Utility Model

[0005] The purpose of the utility model is to provide a combined induced draft fan to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A combined induced draft fan, including a bottom mounting frame, on which a first sliding frame and a second sliding frame are provided. A driving motor is fixedly installed on the first sliding frame, and a protective cover is fixedly installed on the second sliding frame. A support frame is also provided at the top of the first sliding frame. An air induction paddle is arranged inside the protective cover. A first rotating rod is fixedly installed at the central position of the air induction paddle, and the first rotating rod is movably installed on the protective cover. A second rotating rod is fixedly installed on the output shaft of the driving motor. A connecting plug is arranged between the first rotating rod and the second rotating rod for connection, and the connection position between the first rotating rod and the second rotating rod is located inside the support frame. A fixed slide rail is fixedly installed inside the bottom mounting frame. Sliding seats are arranged at the bottoms of the first sliding frame and the second sliding frame. The bottom of the sliding seat is rotatably connected to a sliding wheel, and the sliding wheel is movably engaged in a guiding groove opened at the top of the fixed slide rail.

[0007] Preferably, side plates are provided on both sides of the bottom mounting frame and the first sliding frame. A locking handle is threadedly connected to the side plate, and the end of the locking handle located inside the side plate is in contact with the side wall of the bottom mounting frame.

[0008] Preferably, the central axes of the first rotating rod and the second rotating rod are on the same axis.

[0009] Preferably, the length of the connecting plug is less than the diameters of the first rotating rod and the second rotating rod.

[0010] Preferably, the air guiding paddle and the protective cover are in clearance fit with each other.

[0011] Preferably, an internally threaded fixing tube is fixedly installed on one side of the protective cover close to the driving motor. An externally threaded tube is in internal threaded connection with the internally threaded fixing tube. A screwing sleeve is arranged on the side of the externally threaded tube away from the driving motor. A bearing is movably installed in the screwing sleeve. The internally threaded fixing tube, the externally threaded tube and the screwing sleeve are all located outside the first rotating rod.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] By horizontally moving the first sliding frame and the second sliding frame, the connection of the structure between the driving motor and the protective cover is realized. At the same time, by rotating the locking handle, the driving motor and the protective cover are fixed after moving. After the fixing of the protective cover is completed, the position of the driving motor is adjusted again, and the position of the air guiding paddle in the protective cover changes, thereby changing the air guiding effect of the rotation of the air guiding paddle, finding the optimal position of the paddle blade, enabling the fan to achieve higher efficiency during operation, reducing energy waste, and accurately adjusting the air volume output of the induced draft fan according to actual needs to meet the ventilation requirements under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front view of the present utility model;

[0015] Figure 2 is the side view of the present utility model;

[0016] Figure 3 is the structural schematic diagram of the corresponding position of the connecting plug of the present utility model;

[0017] Figure 4 is the structural schematic diagram of the corresponding position of the fixed slide rail of the present utility model;

[0018] Figure 5 is the structural schematic diagram of the corresponding position of the internally threaded fixing tube of the present utility model;

[0019] Figure 6 is the structural schematic diagram of the corresponding position of the sliding wheel of the present utility model.

[0020] In the figure: 1, bottom mounting frame; 2, first sliding frame; 3, second sliding frame; 4, driving motor; 5, protective cover; 6, support frame; 7, air guiding paddle; 8, first rotating rod; 9, second rotating rod; 10, connecting plug; 11, fixed slide rail; 12, sliding seat; 13, sliding wheel; 14, side plate; 15, locking handle; 16, internally threaded fixing tube; 17, externally threaded tube; 18, screwing sleeve; 19, bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the protection scope of the present utility model.

[0022] Please refer to Figures 1 to 6 , the present utility model provides a technical solution: a combined induced draft fan, including a bottom mounting frame 1, on which a first sliding frame 2 and a second sliding frame 3 are provided. Both the first sliding frame 2 and the second sliding frame 3 are movably installed in the bottom mounting frame 1. By adjusting the positions of the first sliding frame 2 and the second sliding frame 3, the connection of the structure composed of the drive motor 4 and the protective cover 5 is realized. A drive motor 4 is fixedly installed on the first sliding frame 2, and the drive motor 4 is used to drive the rotation of the induced draft paddle 7 in the protective cover 5 to realize the induced draft operation. A protective cover 5 is fixedly installed on the second sliding frame 3, and the second sliding frame 3 supports the protective cover 5 to ensure the installation effect of the protective cover 5. A support frame 6 is further provided on the top of the first sliding frame 2, and a buckle structure is provided on the support frame 6 for fixing the connection position of the first rotating rod 8 and the second rotating rod 9 to determine the connection effect of the structure composed of the first rotating rod 8 and the second rotating rod 9. An induced draft paddle 7 is provided in the protective cover 5, and there is a clearance fit between the induced draft paddle 7 and the protective cover 5. The induced draft paddle 7 and the protective cover 5 have a clearance fit, and the induced draft paddle 7 can move horizontally in the protective cover 5 to ensure that the induced draft paddle 7 can be adjusted and moved at a small angle in the protective cover 5.

[0023] At the central position of the air guiding paddle 7, a first rotating rod 8 is fixedly installed. The first rotating rod 8 is used to drive the rotation of the air guiding paddle 7 in the protective cover 5. The first rotating rod 8 is movably installed on the protective cover 5. A groove corresponding to the first rotating rod 8 is opened on the protective cover 5 to ensure that the first rotating rod 8 is movably installed in the protective cover 5. A second rotating rod 9 is fixedly installed on the output shaft of the driving motor 4. A connecting plug 10 is provided between the first rotating rod 8 and the second rotating rod 9 for connection. And the connection position between the first rotating rod 8 and the second rotating rod 9 is located inside the support frame 6. The connecting plug 10 sequentially passes through the holes on the second rotating rod 9 and the holes on the first rotating rod 8 to realize the connection between the first rotating rod 8 and the second rotating rod 9, ensuring the fixing effect of the connection between the first rotating rod 8 and the second rotating rod 9. The central axes of the first rotating rod 8 and the second rotating rod 9 are on the same axis line, ensuring that after the opposite ends of the first rotating rod 8 and the second rotating rod 9 approach, the first rotating rod 8 and the second rotating rod 9 can be engaged together. A fixed slide rail 11 is fixedly installed inside the bottom mounting frame 1. Sliding seats 12 are provided at the bottoms of the first sliding frame 2 and the second sliding frame 3. The sliding seats 12 slide in the grooves opened on the bottom mounting frame 1 to ensure that the first sliding frame 2 and the second sliding frame 3 slide on the bottom mounting frame 1. The bottom of the sliding seat 12 is rotatably connected with a sliding wheel 13. The sliding wheel 13 is movably engaged in the guiding groove opened at the top of the fixed slide rail 11.

[0024] Side plates 14 are provided on both sides of the bottom mounting frame 1 and the first sliding frame 2. A locking handle 15 is threadedly connected to the side plate 14. The locking handle 15 is composed of a screwing part and a threaded part. The screwing part drives the threaded part to move to realize the fixing of the structure composed of the first sliding frame 2 and the second sliding frame 3. One end of the locking handle 15 located inside the side plate 14 is in contact with the side wall of the bottom mounting frame 1. After the adjustment of the structure composed of the first sliding frame 2 and the second sliding frame 3 is completed, by rotating the locking handle 15, the end of the locking handle 15 located inside the side plate 14 presses on the side wall of the bottom mounting frame 1 to ensure the fixing after the first sliding frame 2 and the second sliding frame 3 are combined.

[0025] The length of the connecting plug 10 is less than the diameters of the first rotating rod 8 and the second rotating rod 9. The connecting plug 10 will not affect the movement of the structure composed of the first rotating rod 8 and the second rotating rod 9 inside the support frame 6.

[0026] On one side of the protective cover 5 close to the driving motor 4, an internally threaded fixing pipe 16 is fixedly installed. The internally threaded fixing pipe 16 is connected with an externally threaded pipe 17 in a threaded manner. The hexagonal bolt part on the screwing sleeve 18 can drive the externally threaded pipe 17 to rotate. The externally threaded pipe 17 moves in a threaded manner within the internally threaded fixing pipe 16. A bearing 19 is sleeved outside the first rotating rod 8. On the side of the externally threaded pipe 17 away from the driving motor 4, there is a screwing sleeve 18. A bearing 19 is movably installed inside the screwing sleeve 18. The internally threaded fixing pipe 16, the externally threaded pipe 17, and the screwing sleeve 18 are all located outside the first rotating rod 8. The internally threaded fixing pipe 16, the externally threaded pipe 17, and the screwing sleeve 18 support the first rotating rod 8 to ensure the lateral fixing effect of the first rotating rod 8.

[0027] Working principle:

[0028] By horizontally moving the first sliding frame 2 and the second sliding frame 3, the connection of the structure between the driving motor 4 and the protective cover 5 is realized. When horizontally moving the first sliding frame 2 and the second sliding frame 3, the sliding seats 12 at the bottoms of the first sliding frame 2 and the second sliding frame 3 slide within the bottom mounting frame 1, and the sliding wheels 13 at the bottoms of the sliding seats 12 move within the guiding grooves at the tops of the fixed sliding rails 11. The second rotating rod 9 on the driving motor 4 contacts the first rotating rod 8 on the air guiding paddle 7. After the second rotating rod 9 and the first rotating rod 8 are butted, the connecting plug pin 10 is inserted into the connection position of the first rotating rod 8 and the second rotating rod 9 to realize the fixation of the connection position of the first rotating rod 8 and the second rotating rod 9, thereby realizing the connection between the driving motor 4 and the protective cover 5. At the same time, rotate the locking handle 15 to fix the second sliding frame 3 at the bottom of the protective cover 5. After the protective cover 5 is fixed, adjust the position of the driving motor 4 again to change the position of the air guiding paddle 7 within the protective cover 5, thereby changing the air guiding effect of the rotation of the air guiding paddle 7, and realize the fixation after the movement of the first sliding frame 2 by rotating the locking handle 15.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined induced draft fan, comprising a bottom mounting frame (1), characterized in that: The bottom mounting frame (1) is provided with a first sliding frame (2) and a second sliding frame (3); a driving motor (4) is fixedly mounted on the first sliding frame (2); a protective cover (5) is fixedly mounted on the second sliding frame (3); a supporting frame (6) is further provided on the top of the first sliding frame (2); an air-inducing paddle (7) is provided inside the protective cover (5); a first rotating rod (8) is fixedly mounted at a center position of the air-inducing paddle (7); the first rotating rod (8) is movably mounted on the protective cover (5); a first rotating rod (8) is fixedly mounted on an output shaft of the driving motor (4); Two rotating rods (9), a connecting dowel (10) is provided between the first rotating rod (8) and the second rotating rod (9) for connection, and the connection position of the first rotating rod (8) and the second rotating rod (9) is located in the support frame (6), a fixed slide rail (11) is fixedly installed in the bottom mounting frame (1), and a sliding seat (12) is provided at the bottom of the first sliding frame (2) and the second sliding frame (3), and a sliding wheel (13) is rotatably connected to the bottom of the sliding seat (12), and the sliding wheel (13) is movably engaged in a guide groove opened at the top of the fixed slide rail (11).

2. The combined induced draft fan according to claim 1, characterized in that: Side panels (14) are provided on both sides of the bottom mounting frame (1) and the first sliding frame (2), and a locking handle (15) is threadedly connected to the side panel (14), and one end of the locking handle (15) located inside the side panel (14) is in contact with the side wall of the bottom mounting frame (1).

3. A combined induced draft fan according to claim 2, characterized in that: The central axes of the first rotating rod (8) and the second rotating rod (9) are located on the same axis.

4. The combined induced draft fan according to claim 3, characterized in that: The length of the connecting pin (10) is smaller than the diameters of the first rotating rod (8) and the second rotating rod (9).

5. A combined induced draft fan according to claim 4, characterized in that: The air-inducing paddle (7) and the protective cover (5) are clearance-fitted.

6. The combined induced draft fan according to claim 5, characterized in that: An internally threaded fixing tube (16) is fixedly mounted on a side of the protective cover (5) close to the drive motor (4); an externally threaded tube (17) is internally connected to the internally threaded fixing tube (16); a screwing sleeve (18) is disposed on a side of the externally threaded tube (17) away from the drive motor (4); a bearing (19) is movably mounted in the screwing sleeve (18); and the internally threaded fixing tube (16), the externally threaded tube (17) and the screwing sleeve (18) are all located outside the first rotating rod (8).

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