Special centrifugal fan for solid waste treatment equipment

Abstract

This utility model relates to a dedicated centrifugal fan for solid waste treatment equipment. The centrifugal fan includes a volute and a motor, both fixed to a stepped fan base. Both the fan base and the fan are housed within a rectangular frame of the solid waste treatment equipment. Two sets of longitudinal guide rails are fixed to the bottom of the fan base, inserted into guide rail grooves fixed to the frame. The volute of the centrifugal fan has an air inlet, and an air inlet cylinder connected to the air inlet is formed on the volute. An L-shaped connecting sleeve is fitted onto the connecting sleeve, consisting of a cylinder and a flange. The flange has several mounting holes, and several nuts corresponding to the mounting holes are welded and fixed to the end face of the flange near the centrifugal fan. This centrifugal fan uses a guide rail structure within the frame for easy access to and from the frame. Simultaneously, its outlet has an adjustable connecting sleeve for easy connection to a dust collection pipeline.

Description

Technical fields:

[0001] This utility model relates to the technical field of ventilation fans, and more specifically to a special centrifugal fan for solid waste treatment equipment. Background technology:

[0002] Solid waste treatment equipment refers to mechanical equipment used to treat solid waste. It mainly includes crushing equipment, sorting equipment, incineration equipment, and landfill equipment, such as municipal solid waste sorting machines. A municipal solid waste sorting machine is a device used to automatically classify, screen, crush, and convey mixed municipal solid waste, aiming to achieve waste reduction, resource recovery, and harmless treatment. The initial section of the municipal solid waste sorting machine is a feeding conveyor belt, which is mounted on a rectangular frame. A sealed screening and crushing mechanism is installed at the rear of the feeding conveyor belt. Dust is generated during the operation of the crushing mechanism, so a dust removal system is required. This system includes a suction pipe connected to the protective cover of the screening and crushing mechanism, a matching centrifugal fan, and a dust removal pipe. The centrifugal fan is installed in the frame below the feed conveyor belt, and the side air inlet is connected to the suction pipe. When the centrifugal fan malfunctions, it needs to be disassembled from the suction and dust removal pipes, and then the centrifugal fan needs to be moved out of the frame, which is very troublesome. Therefore, a structure that facilitates the maintenance of the centrifugal fan needs to be designed. Utility model content:

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a dedicated centrifugal fan for solid waste treatment equipment. The centrifugal fan is installed inside the frame using a guide rail structure, which facilitates the entry and exit of the centrifugal fan from the frame. At the same time, its outlet is equipped with a movable and adjustable connecting cylinder, which facilitates connection with the dust collection pipeline. When disassembling, it can be retracted into the frame without interfering with the pulling of the centrifugal fan.

[0004] The solid waste treatment equipment is equipped with a special centrifugal fan, which includes a centrifugal fan, a volute and a motor. The volute and the motor are fixed on a stepped fan base. The fan base and the fan are both set in a rectangular frame on the solid waste treatment equipment. Two sets of longitudinal guide rails are fixed to the bottom of the fan base. The guide rails are inserted into the guide rail grooves, which are fixed to the frame.

[0005] The centrifugal fan has an air inlet on its volute casing, and an air inlet duct connected to the air inlet is formed on the volute casing. A connecting cylinder with an L-shaped cross-section is fitted on the connecting cylinder, which consists of a cylinder and a flange. The flange of the connecting cylinder has several mounting holes formed on it. Several nuts corresponding to the mounting holes are welded and fixed on the end face of the flange near the centrifugal fan. Several connecting bolts are inserted into the flange of the connecting cylinder, and the connecting bolts are distributed among the connecting bolts. The ends of the connecting bolts pass through the flange and are screwed into the internal threaded sleeve. The internal threaded sleeve is fixed to the volute casing around the air inlet.

[0006] Preferably, the connecting cylinder and the air inlet cylinder on the centrifugal fan are both located inside the frame; the diameter of the inner wall of the connecting cylinder is equal to the diameter of the outer wall of the air inlet cylinder, and the central axis of the air inlet cylinder coincides with the air inlet of the air inlet.

[0007] Preferably, the number of connecting bolts is equal to the number of mounting holes, and both the mounting holes and connecting bolts are evenly distributed in a ring around the central axis of the connecting cylinder.

[0008] Preferably, the connecting bolts are hexagon socket head cap screws, and a circular rubber gasket is attached to the flange of the connecting cylinder. The rubber gasket has several through holes corresponding to the mounting holes and clearance holes corresponding to the connecting bolts. The head of the connecting bolt is inserted into the clearance hole of the rubber gasket.

[0009] The thickness of the rubber washer is greater than the length of the connecting bolt head.

[0010] Preferably, the air outlet of the centrifugal fan volute is rectangular, and a rectangular connecting frame is formed around the air outlet, with a plurality of connecting holes formed on the connecting frame.

[0011] Preferably, a longitudinal bottom beam abuts against the lower end surface of the guide rail groove, and the longitudinal bottom beam is fixed to the bottom of the frame.

[0012] Preferably, the rear end of the guide rail extends out of the guide rail and is screwed to the frame with a vertical limiting bolt, and a horizontal angle iron is fixed to the rear end face of the bottom of the frame, with several slots formed on the angle iron.

[0013] The limiting bolt is an external hexagonal bolt, with the threaded section of the limiting bolt inserted into the slot of the angle iron, and the head of the limiting bolt pressing against the angle iron.

[0014] The beneficial effects of this utility model are as follows:

[0015] This centrifugal fan is installed inside the frame using a guide rail structure, which facilitates the entry and exit of the centrifugal fan from the frame. At the same time, its outlet is equipped with a movable and adjustable connecting cylinder, which is convenient for connecting to the dust collection pipeline. When disassembling, it can be retracted into the frame without interfering with the pulling of the centrifugal fan. Attached image description:

[0016] Figure 1 This is a side view of the structure of this utility model;

[0017] Figure 2 for Figure 1 A magnified view of a portion of point A in the diagram;

[0018] Figure 3 This is a partial cross-sectional view of the present invention from the frontal view.

[0019] In the diagram: 1. Centrifugal fan; 11. Air inlet; 12. Air inlet duct; 13. Connecting frame; 2. Frame; 3. Fan base; 4. Connecting cylinder; 5. Nut; 6. Internal threaded sleeve; 7. Connecting bolt; 8. Rubber washer; 81. Through hole; 82. Clearance hole; 9. Guide rail; 10. Guide rail groove; 20. Angle iron; 201. Groove; 30. Limit bolt. Detailed implementation method:

[0020] Example: See Figures 1 to 3 As shown, the solid waste treatment equipment is equipped with a special centrifugal fan, including a centrifugal fan 1. The centrifugal fan 1 includes a volute and a motor. The volute and the motor are fixedly connected to a stepped fan base 3. Both the fan base 3 and the fan 1 are set in a rectangular frame 1 on the solid waste treatment equipment. Two sets of longitudinal guide rails 9 are fixedly connected to the bottom of the fan base 3. The guide rails 9 are inserted into the guide rail grooves 10. The guide rail grooves 10 are fixedly connected to the frame 2.

[0021] The centrifugal fan 1 has an air inlet 11 on its volute, and an air inlet duct 12 connected to the air inlet 11 is formed on the volute. A connecting cylinder 4 with an L-shaped cross section is fitted on the connecting cylinder 4. The connecting cylinder 4 is composed of a cylinder and a flange. Several mounting holes 41 are formed on the flange of the connecting cylinder 4. Several nuts 5 opposite to the mounting holes 41 are welded and fixed on the end face of the flange near the centrifugal fan 1. Several connecting bolts 7 are inserted into the flange of the connecting cylinder 4. The connecting bolts 7 are distributed among the connecting bolts 7. The ends of the connecting bolts 7 pass through the flange and are screwed into the internal threaded sleeve 6. The internal threaded sleeve 6 is fixed to the volute around the air inlet 11.

[0022] The connecting cylinder 4 and the air inlet cylinder 12 on the centrifugal fan 1 are both located inside the frame 2, such as Figure 3 As shown, when the connecting cylinder 4 is in the retracted state, its overall centrifugal fan 1 structure is located between the two side frames of the frame 2, so that the centrifugal fan 1 can be pulled into the frame 2.

[0023] The diameter of the inner wall of the connecting cylinder 4 is equal to the diameter of the outer wall of the air inlet cylinder 12. The central axis of the air inlet cylinder 12 coincides with the air inlet 11 of the air inlet 11. Therefore, there is no gap between the air inlet cylinder 12 and the connecting cylinder 4, and there will be no leakage problem.

[0024] The number of connecting bolts 7 is equal to the number of mounting holes 41, and the mounting holes 41 and connecting bolts 7 are evenly distributed in a ring around the central axis of the connecting cylinder 4.

[0025] The connecting bolt 7 is an internal hex bolt. A circular rubber washer 8 is attached to the flange of the connecting sleeve 4. The rubber washer 8 has several through holes 81 opposite to the mounting hole 41 and clearance holes 82 opposite to the connecting bolt 7. The head of the connecting bolt 7 is inserted into the clearance hole 82 of the rubber washer 8. The thickness of the rubber washer 8 is greater than the length of the head of the connecting bolt 7. The rubber washer 8 can accommodate the connecting bolt 7 and ensure the seal between the connecting sleeve 4 and the connected dust collection pipe.

[0026] The air outlet of the volute of the centrifugal fan 1 is rectangular, and a rectangular connecting frame 13 is formed around the air outlet. Several connecting holes are formed on the connecting frame 13. The connecting frame 13 is connected to the dust removal pipeline on the solid waste treatment equipment through a bolt assembly.

[0027] The lower end face of the guide rail groove 10 is abutted against a longitudinal bottom beam, which is fixed to the bottom of the frame 2. The longitudinal bottom beam can support the guide rail groove 10 and improve the support strength for the centrifugal fan 1.

[0028] The rear end of the guide rail 9 extends out of the guide rail 9 and is screwed to the frame 2 with a vertical limiting bolt 30. A horizontal angle iron 20 is fixed to the rear end face of the bottom of the frame 2. The angle iron 20 has several slots 201 formed on it. The limiting bolt 30 is an external hexagonal bolt. The threaded section of the limiting bolt 30 is inserted into the slot 201 of the angle iron 20, and the head of the limiting bolt 30 presses against the angle iron 20. When the limiting bolt 30 is connected to the angle iron 20, the centrifugal fan 1 can be fixedly positioned. When the centrifugal fan 1 is pulled away from the frame 2 by the guide rail 9 and moved to the outside of the frame 2, the head of the limiting bolt 30 is pressed against the ground by rotating the limiting bolt 30. The limiting bolt 30 can support the guide rail 9.

[0029] Working principle: This structure is a special centrifugal fan for solid waste treatment equipment. The main technical feature of the centrifugal fan is that it is equipped with guide rails 9 and guide rail grooves 10. The centrifugal fan 1 can be pulled out and put into the frame 2, which makes it convenient to remove the centrifugal fan 1 from the frame 2 for maintenance.

[0030] However, there is a problem with the pull-out method: the air inlet of the centrifugal fan 1 must not interfere with the frame 2 during the movement of the fan, and there must be no gap when it is connected to the dust collection pipe. Therefore, a movable and positioning connecting cylinder 4 structure was added, which can be easily connected to the dust collection pipe and can be retracted into the frame 2 so that there will be no interference when the centrifugal fan 1 is pulled out of the frame 2.

[0031] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A dedicated centrifugal fan for solid waste treatment equipment, including a centrifugal fan (1), the centrifugal fan (1) including a volute and a motor, the volute and the motor being fixedly connected to a stepped fan base (3), the fan base (3) and the fan (1) being set inside a rectangular frame (1) on the solid waste treatment equipment, characterized in that: Two sets of longitudinal guide rails (9) are fixed to the bottom of the fan base (3). The guide rails (9) are inserted into the guide rail groove (10), and the guide rail groove (10) is fixed to the frame (2). The centrifugal fan (1) has an air inlet (11) on its volute. An air inlet tube (12) connected to the air inlet (11) is formed on the volute. A connecting tube (4) with an L-shaped cross section is fitted on the connecting tube (4). The connecting tube (4) is composed of a cylinder and a flange. Several mounting holes (41) are formed on the flange of the connecting tube (4). Several nuts (5) opposite to the mounting holes (41) are welded and fixed on the end face of the flange near the centrifugal fan (1). Several connecting bolts (7) are inserted into the flange of the connecting tube (4). The connecting bolts (7) are distributed between the connecting bolts (7). The ends of the connecting bolts (7) pass through the flange and are screwed into the internal threaded sleeve (6). The internal threaded sleeve (6) is fixed to the volute around the air inlet (11).

2. The dedicated centrifugal fan for solid waste treatment equipment according to claim 1, characterized in that: The connecting cylinder (4) and the air inlet cylinder (12) on the centrifugal fan (1) are both located inside the frame (2); the diameter of the inner wall of the connecting cylinder (4) is equal to the diameter of the outer wall of the air inlet cylinder (12), and the central axis of the air inlet cylinder (12) coincides with the air inlet (11) of the air inlet (11).

3. The dedicated centrifugal fan supporting the solid waste treatment equipment according to claim 2, wherein: The number of connecting bolts (7) is equal to the number of mounting holes (41), and the mounting holes (41) and connecting bolts (7) are evenly distributed in a ring around the central axis of the connecting cylinder (4).

4. The dedicated centrifugal fan for solid waste treatment equipment according to claim 1, characterized in that: The connecting bolt (7) is an internal hex bolt. A circular rubber washer (8) is attached to the flange of the connecting cylinder (4). The rubber washer (8) has several through holes (81) opposite to the mounting hole (41) and clearance holes (82) opposite to the connecting bolt (7). The head of the connecting bolt (7) is inserted into the clearance hole (82) of the rubber washer (8). The thickness of the rubber washer (8) is greater than the length of the head of the connecting bolt (7).

5. The dedicated centrifugal fan for solid waste treatment equipment according to claim 1, characterized in that: The air outlet of the centrifugal fan (1) is rectangular, and a rectangular connecting frame (13) is formed around the air outlet. Several connecting holes are formed on the connecting frame (13).

6. The dedicated centrifugal fan for solid waste treatment equipment according to claim 1, characterized in that: The lower end face of the guide rail groove (10) is abutted against a longitudinal bottom beam, which is fixed to the bottom of the frame (2).

7. The dedicated centrifugal fan for solid waste treatment equipment according to claim 6, characterized in that: The rear end of the guide rail (9) extends out of the guide rail (9) and is screwed to the frame (2) with a vertical limiting bolt (30). A transverse angle iron (20) is fixed to the rear end face of the bottom of the frame (2). Several slots (201) are formed on the angle iron (20). The limiting bolt (30) is an external hexagonal bolt. The threaded section of the limiting bolt (30) is inserted into the slot (201) of the angle iron (20), and the head of the limiting bolt (30) presses against the angle iron (20).

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