Large-flow centrifugal fan for powder air net

Abstract

The invention discloses a large-flow centrifugal fan for a powder air net, and relates to the technical field of centrifugal fans, the centrifugal fan comprises a shell assembly, a driving assembly and an impeller assembly, the impeller assembly is arranged in the shell assembly, the driving assembly is arranged on one side of the shell assembly, and a detection assembly is arranged on one side of the impeller assembly; the detection assembly is used for detecting the agglomeration distribution condition of the powder in the discharge port; the driving assembly is used for controlling the blades to rotate, the impeller assembly is used for providing high-air-volume wind power through rotation and pushing powder to move, and the detection assembly is used for agglomeration distribution in the discharging port and conducts corresponding adjustment according to the detection result.

Description

Technical Field

[0001] This invention relates to the field of centrifugal fan technology, specifically a high-flow centrifugal fan for powder air networks. Background Technology

[0002] In the field of powder material handling, the powder air network is the core system for realizing powder conveying, separation, purification and classification. Its operation relies on airflow to drive the movement of powder, and the centrifugal fan, as the key power unit of the powder air network, needs to continuously provide high airflow to ensure powder conveying efficiency and system stability.

[0003] Currently, the traditional centrifugal fans used in powder conveying systems, although capable of generating airflow through blade rotation to propel powder movement, have significant technical defects in practical applications. Due to the tendency of powder particles to carry static electricity on their surfaces, they are highly susceptible to attracting each other and forming agglomerates during transport. Agglomeration directly leads to a reduction in airflow velocity in local areas, disrupting the overall airflow velocity distribution inside the fan and causing uneven airflow propulsion on the powder, thus affecting the continuity and uniformity of powder conveying. If agglomerates are not broken up in time, they will continue to accumulate in the conveying channel, gradually increasing in size as the conveying process progresses. In severe cases, they can directly block the fan's outlet and subsequent connecting pipes, causing the entire powder conveying system to shut down. Summary of the Invention

[0004] The purpose of this invention is to provide a high-flow-rate centrifugal fan for powder air distribution, in order to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A high-flow centrifugal fan is used for powder air distribution. The centrifugal fan includes a shell assembly, a drive assembly, and an impeller assembly. The impeller assembly is located inside the shell assembly. The drive assembly is located on one side of the shell assembly, and a detection assembly is located on one side of the impeller assembly. The detection assembly is used to detect the distribution of powder agglomeration in the discharge port.

[0006] Furthermore, the powder air network is a core component of the powder material handling system. Its core function is to realize key processes such as powder conveying, separation, purification, and classification through airflow power, while ensuring a clean production environment and stable equipment operation. The centrifugal fan is the power unit in the powder air network, used to provide high-volume gas conveying. The movement of gas drives the movement of powder. However, during the movement, powder is prone to agglomeration, which can lead to a decrease in wind speed in local areas. This agglomeration may disrupt the overall wind speed distribution or increase the scale of powder agglomeration. Ultimately, powder agglomeration can affect the blades, increasing the working pressure of the centrifugal fan. If powder agglomeration is not broken up, it will only increase in number during subsequent movement, and in severe cases, it can lead to conveying blockage. The shell assembly serves as the mounting component and connects to the external pipeline to convey powder. The drive assembly controls the rotation of the blades, and the impeller assembly provides high-volume airflow through rotation to propel the powder. The detection assembly detects the agglomeration distribution within the discharge port and makes corresponding adjustments based on the detection results.

[0007] The housing assembly includes a support frame, a housing, and a motor housing. The support frame is located on a horizontal ground and has feet at its bottom. The housing is located inside the support frame and is fixedly connected to the support frame at its bottom. The motor housing is located on one side of the housing and is fixedly connected to the housing.

[0008] Furthermore, the support frame is used to make the housing and motor housing stand on a horizontal ground, and the pads at the bottom of the support frame are used to prevent the support frame from slipping. The housing serves as the basic mounting component, and the impeller assembly is located inside the housing. The drive assembly is located on one side of the housing, and the control terminal is located inside the motor housing.

[0009] The top of the casing has a feed inlet, and the side of the casing away from the motor housing has a discharge outlet. Flanges are provided outside the discharge outlet and the discharge outlet respectively.

[0010] Furthermore, the top of the casing has a feed inlet and the side away from the motor casing has a discharge outlet, so that the wind force generated by the impeller assembly can push the powder entering from the feed inlet to the discharge outlet. Then, the flange has two fixed connections to the feed inlet and the discharge outlet respectively.

[0011] The detection assembly includes electrode needles, electrode plates, and connecting blocks. The electrode needles are located inside the discharge port of the machine housing. Several electrode needles are provided and arranged in a ring at equal intervals along the inner wall of the discharge port. An electrode plate is provided on the side of the electrode needle away from the blade, and a connecting block is provided on the side of the electrode plate away from the electrode needle. The connecting block is fixedly connected to the electrode plate and is located on the inner wall of the discharge port. A sliding groove is provided on the inner wall of the discharge port, and the connecting block is slidably connected to the sliding groove. A tension spring is provided on the side of the connecting block close to the electrode needle.

[0012] Furthermore, the electrode needle is electrically connected to an external power source. The tip of the electrode needle is located on the side away from the blades. When energized, the tip ionizes the air, generating ions. These ionized air particles neutralize the static electricity attached to the powder, weakening the agglomeration force at its source and neutralizing the surface charge of the particles. Agglomerates formed by electrostatic attraction lose their charge pull and disperse easily under slight airflow disturbance. This also prevents the powder from adhering to the inner wall of the casing. Then, when the electrode needle ionizes the air, its electrode plate guides the ion wind, and its connecting block controls the electrical flow. The position of the electrode plate and the groove are used to restrict the movement of the connecting block. The closer the electrode plate is to the electrode needle on the groove, the better the ionization effect. Under normal transportation, high air volume will drive the connecting block to move. Without the guidance of the electrode plate, the electrode needle will only ionize the air. When the powder is found to agglomerate, it will affect the flow rate in the corresponding area and reduce the flow rate. The connecting block moves towards the electrode needle under the drive of the tension spring. The electrode plate then plays the role of guiding the ion wind. At the same time, the generation of ion wind will supplement the airflow velocity in the corresponding area. The more agglomerates, the more airflow velocity is supplemented.

[0013] A coil is provided on one side of the inner wall of the chute. One end of the coil is fixedly connected to the inner wall of the chute. A magnetic column is provided inside the coil. One end of the magnetic column is rotatably connected to the inner wall of the chute. A screw is provided at the other end of the magnetic column. The screw is fixedly connected to the magnetic column. The bottom end of the connecting block is sleeved on the screw body.

[0014] Furthermore, during the powder agglomeration treatment process, the connecting block will move. Since the bottom end of the connecting block is engaged with the screw thread, the movement of the connecting block will drive the screw to rotate. The rotation of the screw will drive the magnetic column to rotate. Since the magnetic column is located inside the coil, the rotation of the magnetic column will cause the coil to generate an induced current. When the connecting block moves out of the discharge port, the screw rotates in the forward direction and the coil generates a positive current. When the connecting block moves inward of the discharge port, the screw rotates in the reverse direction and the coil generates a negative current. The positive and negative currents are used to determine whether powder agglomeration has occurred.

[0015] The drive assembly includes a rotary motor, a main pulley, and a secondary pulley. The rotary motor is located at the top of the support frame, and the fixed end of the rotary motor is fixedly connected to the support frame. The main pulley is located at the output end of the rotary motor, and the secondary pulley is located in the motor housing. The secondary pulley is rotatably connected to the motor housing, and the main pulley and the secondary pulley are connected by a belt.

[0016] Furthermore, the rotating motor serves as the power source to control the rotation of the main pulley, and the main pulley and the auxiliary pulley are connected by belt drive. When the main pulley rotates, it drives the auxiliary pulley to rotate, thus realizing power transmission.

[0017] The main pulley is covered by a cover, which is fitted onto the main pulley and the auxiliary pulley. The inner wall of the cover is rotatably connected to the main pulley and the auxiliary pulley respectively. A dustproof net is provided on one side of the cover, and the dustproof net is fastened to the cover.

[0018] Furthermore, the cover is installed on the main pulley and the auxiliary pulley, which are located at both ends of the inner wall of the cover. The opening on one side of the cover is connected to a dustproof net, so that when the rotating motor is working, the transmission components are protected from dust by the cover and the dustproof net, thereby improving their service life.

[0019] The impeller assembly includes blades, a drive shaft, and a dust cover. The blades are located inside the housing. The drive shaft is located on the side of the blades away from the discharge port. One end of the drive shaft is fixedly connected to the blades, and the other end of the drive shaft passes through the housing and is located at the top of the motor housing. The end of the drive shaft away from the blades is fixedly connected to the auxiliary pulley. The dust cover is located at the top of the motor housing and is fixedly connected to the top of the motor housing.

[0020] Furthermore, one end of the drive shaft is fixedly connected to the auxiliary pulley, and the other end is fixedly connected to the blade. When the rotating motor is working, it drives the blade to rotate through the main pulley and the auxiliary pulley. Then, a dust cover is placed on the drive shaft to protect it from dust.

[0021] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention uses the ionization of air by the electrode needle to neutralize the static electricity on the surface of the powder, thereby weakening the agglomeration force from the source and preventing the powder from continuously agglomerating due to static attraction. At the same time, when agglomeration occurs, the electrode plate guides the ion wind to supplement the wind speed in a directional manner, breaking up the agglomerates that have already formed, avoiding the agglomeration scale from affecting the fan blades and increasing the working pressure, and further preventing the conveying blockage problem caused by the agglomeration of powder.

[0022] 2. This invention uses the moving connecting block to drive the screw and rotating the magnetic column, causing the coil to generate positive and negative induced currents. The current signal can accurately determine whether agglomeration has occurred and the degree of agglomeration, avoiding the shortcomings of traditional fans that cannot detect agglomeration and operate blindly. This provides a precise basis for subsequent adjustments and ensures the stability of the fan operation.

[0023] 3. The present invention uses ionization of electrode needles to generate ions that neutralize the static electricity of powder while preventing powder from adhering to the inner wall of the machine casing, thus avoiding the accumulation of powder inside the casing and forming dust pollution. This reduces the internal cleaning and maintenance costs of the equipment and ensures the cleanliness of the production environment around the powder ventilation network, meeting the environmental cleanliness requirements of the powder processing field. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the driving component of the present invention; Figure 3 This is a schematic diagram of the blade structure of the present invention; Figure 4 This is a schematic diagram of the structure of the casing of the present invention; Figure 5 This is a schematic diagram of the transmission shaft of the present invention; Figure 6 This is a schematic diagram of the feed inlet structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of part A in the middle section; Figure 8 This is a schematic diagram of the connecting block of the present invention; Figure 9 For the present invention Figure 8 Enlarged schematic diagram of section B in the middle.

[0025] In the diagram: 1. Shell assembly; 11. Support frame; 12. Machine casing; 121. Feed inlet; 122. Discharge outlet; 123. Slide groove; 13. Motor housing; 14. Flange; 2. Detection assembly; 21. Electrode needle; 22. Electrode plate; 23. Connecting block; 24. Tension spring; 25. Coil; 26. Magnetic column; 27. Screw; 3. Drive assembly; 31. Rotating motor; 32. Main pulley; 33. Auxiliary pulley; 34. Cover; 35. Dustproof net; 4. Impeller assembly; 41. Blade; 42. Drive shaft; 43. Dustproof cover. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example: Figures 1-9 As shown, a high-flow centrifugal fan is used for powder air network. The centrifugal fan includes a shell assembly 1, a drive assembly 3 and an impeller assembly 4. The impeller assembly 4 is installed inside the shell assembly 1. The drive assembly 3 is installed on one side of the shell assembly 1 and the detection assembly 2 is installed on one side of the impeller assembly 4. The detection assembly 2 is used to detect the distribution of powder agglomeration in the discharge port 122.

[0028] Specifically, the powder air network is a core component of the powder material handling system. Its core function is to realize key processes such as powder conveying, separation, purification, and classification through airflow power, while ensuring a clean production environment and stable equipment operation. The centrifugal fan is the power unit in the powder air network, used to provide high-volume gas conveying. The gas movement drives the powder movement. However, during the movement, powder is prone to agglomeration, which can lead to a decrease in wind speed in local areas, potentially disrupting the overall wind speed distribution or increasing the scale of powder agglomeration. Ultimately, powder agglomeration can affect the blades 41, increasing the working pressure of the centrifugal fan. If powder agglomeration is not broken up, it will only increase in subsequent movement, potentially causing conveying blockages. The housing assembly 1 serves as an installation component and connects to external pipelines to convey powder. The drive assembly 3 controls the rotation of the blades 41, and the impeller assembly 4 provides high-volume airflow through rotation to propel the powder movement. The detection assembly 2 detects the agglomeration distribution within the discharge port 122 and makes corresponding adjustments based on the detection results.

[0029] like Figures 1-3 As shown, the housing assembly 1 includes a support frame 11, a housing 12, and a motor housing 13. The support frame 11 is located on a horizontal ground and has feet at its bottom. The housing 12 is located inside the support frame 11 and is fixedly connected to the support frame 11 at its bottom. The motor housing 13 is located on one side of the housing 12 and is fixedly connected to the housing 12.

[0030] Specifically, the support frame 11 is used to make the housing 12 and the motor housing 13 stand on a horizontal ground. The pads at the bottom of the support frame 11 are used to prevent the support frame 11 from slipping. The housing 12 serves as the basic mounting component. The impeller assembly 4 is provided inside the housing 12. The drive assembly 3 is located on one side of the housing 12. The control terminal is provided inside the motor housing 13.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 6 As shown, a feed inlet 121 is provided at the top of the housing 12, and a discharge outlet 122 is provided on the side of the housing 12 away from the motor housing 13. Flanges 14 are provided on the outside of the discharge outlet 122 and the discharge outlet 122 respectively.

[0032] Specifically, the top of the housing 12 is provided with a feed inlet 121 and the side away from the motor housing 13 is provided with a discharge outlet 122, so that the wind force generated by the impeller assembly 4 can push the powder entering from the feed inlet 121 to the discharge outlet 122. Then, the flange 14 is provided with two flanges that are fixedly connected to the feed inlet 121 and the discharge outlet 122 respectively.

[0033] like Figure 6 , Figure 7 , Figure 8As shown, the detection component 2 includes an electrode needle 21, an electrode plate 22, and a connecting block 23. The electrode needle 21 is located inside the discharge port 122 of the housing 12. There are several electrode needles 21, which are arranged in a ring at equal intervals along the inner wall of the discharge port 122. The electrode plate 22 is located on the side of the electrode needle 21 away from the blade 41. The connecting block 23 is located on the side of the electrode plate 22 away from the electrode needle 21. The connecting block 23 is fixedly connected to the electrode plate 22. The connecting block 23 is located on the inner wall of the discharge port 122. A sliding groove 123 is opened on the inner wall of the discharge port 122. The connecting block 23 is slidably connected to the sliding groove 123. A tension spring 24 is provided on the side of the connecting block 23 close to the electrode needle 21.

[0034] Specifically, the electrode needle 21 is electrically connected to an external power source. The tip of the electrode needle 21 is located on the side away from the blade 41. When energized, the tip ionizes the air, generating ions. These ionized air particles neutralize the static electricity attached to the powder, weakening the agglomeration force at its source and making the surface charge of the particles more neutral. The agglomerates formed by static attraction lose their charge pull and can disperse under slight airflow disturbance. This also prevents the powder from adhering to the inner wall of the shell. When the electrode needle 21 ionizes the air, its electrode plate 22 guides the ion wind, and its connecting block 23 controls the position of the electrode plate 22. The chute 123 is used to restrict the movement of the connecting block 23. The closer the electrode plate 22 is to the electrode needle 21 on the chute 123, the better its ionization effect. Under normal transportation, the high air volume will push the connecting block 23 to move. Without the guidance of the electrode plate 22, the electrode needle 21 will only ionize the air. When the powder is found to be agglomerated, it will affect the flow rate of the corresponding area and reduce the flow rate. The connecting block 23 moves towards the electrode needle 21 under the drive of the tension spring 24. The electrode plate 22 then plays the role of guiding the ion wind. At the same time, the generation of ion wind will supplement the wind speed of the corresponding area. The more agglomerated, the more wind speed is supplemented.

[0035] like Figure 9 As shown, a coil 25 is provided on one side of the inner wall of the slide groove 123. One end of the coil 25 is fixedly connected to the inner wall of the slide groove 123. A magnetic column 26 is provided inside the coil 25. One end of the magnetic column 26 is rotatably connected to the inner wall of the slide groove 123. A screw 27 is provided at the other end of the magnetic column 26. The screw 27 is fixedly connected to the magnetic column 26. The bottom end of the connecting block 23 is sleeved on the body of the screw 27.

[0036] Specifically, during the powder agglomeration treatment process, the connecting block 23 will move. Since the bottom end of the connecting block 23 is threadedly engaged with the screw 27, the movement of the connecting block 23 will drive the screw 27 to rotate. The rotation of the screw 27 will drive the magnetic column 26 to rotate. Since the magnetic column 26 is located inside the coil 25, the rotation of the magnetic column 26 will cause the coil 25 to generate an induced current. When the connecting block 23 moves outward from the discharge port 122, the screw 27 rotates in the forward direction, and the coil 25 generates a positive current. When the connecting block 23 moves inward from the discharge port 122, the screw 27 rotates in the reverse direction, and the coil 25 generates a negative current. The positive and negative currents are used to determine whether powder agglomeration has occurred.

[0037] like Figure 2 As shown, the drive assembly 3 includes a rotary motor 31, a main pulley 32 and a secondary pulley 33. The rotary motor 31 is located at the top of the support frame 11, and the fixed end of the rotary motor 31 is fixedly connected to the support frame 11. The main pulley 32 is located at the output end of the rotary motor 31, and the secondary pulley 33 is located in the motor housing 13. The secondary pulley 33 is rotatably connected to the motor housing 13, and the main pulley 32 and the secondary pulley 33 are connected by a belt.

[0038] Specifically, the rotating motor 31 serves as a power source to control the rotation of the main pulley 32. The main pulley 32 and the auxiliary pulley 33 are connected by a belt drive. When the main pulley 32 rotates, it drives the auxiliary pulley 33 to rotate, thus realizing power transmission.

[0039] like Figure 4 As shown, a cover 34 is provided outside the main pulley 32. The cover 34 is sleeved on the main pulley 32 and the auxiliary pulley 33. The inner wall of the cover 34 is rotatably connected to the main pulley 32 and the auxiliary pulley 33 respectively. A dustproof net 35 is provided on one side of the cover 34. The dustproof net 35 is fastened to the cover 34.

[0040] Specifically, the cover 34 covers the main pulley 32 and the auxiliary pulley 33, with the main pulley 32 and the auxiliary pulley 33 located at both ends of the inner wall of the cover 34. The opening on one side of the cover 34 is connected to a dustproof net 35, thereby enabling the cover 34 and the dustproof net 35 to protect the transmission components from dust when the rotating motor 31 is working, thus improving its service life.

[0041] like Figure 2 , Figure 3 , Figure 4As shown, the impeller assembly 4 includes blades 41, a drive shaft 42, and a dust cover 43. The blades 41 are located inside the housing 12. The drive shaft 42 is located on the side of the blades 41 away from the discharge port 122. One end of the drive shaft 42 is fixedly connected to the blades 41, and the other end of the drive shaft 42 passes through the housing 12 and is located at the top of the motor housing 13. The end of the drive shaft 42 away from the blades 41 is fixedly connected to the auxiliary pulley 33. The dust cover 43 is located at the top of the motor housing 13 and is fixedly connected to the top of the motor housing 13.

[0042] Specifically, one end of the drive shaft 42 is fixedly connected to the auxiliary pulley 33, and the other end is fixedly connected to the blade 41. When the rotating motor 31 is working, it drives the blade 41 to rotate through the main pulley 32 and the auxiliary pulley 33. Then, the dust cover 43 is placed on the drive shaft 42 to protect the drive shaft 42 from dust.

[0043] Working principle: In the high-flow centrifugal fan for powder air distribution, the support frame 11 in the shell assembly 1 provides horizontal and stable support for the casing 12 and motor housing 13. The inlet 121 of the casing 12 allows powder to enter, and the outlet 122 connects to an external pipeline to achieve powder output. The drive assembly 3 drives the main pulley 32 to rotate via the rotating motor 31, which in turn drives the auxiliary pulley 33 to rotate synchronously via belt transmission. The drive shaft 42 in the impeller assembly 4 rotates with the auxiliary pulley 33, driving the blades 41 inside the casing 12 to rotate at high speed, generating a high-volume airflow that pushes the powder from the inlet 121 to the outlet 122. The detection component 2 generates ions by ionizing the air through the equidistantly arranged annular electrode needles 21, which neutralize the static electricity of the powder to weaken the agglomeration force. During normal conveying, the high air volume pushes the connecting block 23 to move outward from the discharge port 122 against the tension spring 24, and the coil 25 generates a positive current. When agglomeration causes the wind speed to decrease, the connecting block 23 moves towards the electrode needles 21 under the action of the tension spring 24. The electrode plate 22 guides the ion wind to supplement the wind speed. At the same time, the connecting block 23 drives the screw 27 and the magnetic column 26 to rotate, causing the coil 25 to generate a negative current, realizing agglomeration detection and dynamic adjustment, and ensuring the stable operation of the blower.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-flow-rate centrifugal fan for powder air distribution, characterized in that: The centrifugal fan includes a housing assembly (1), a drive assembly (3) and an impeller assembly (4). The impeller assembly (4) is provided inside the housing assembly (1). The drive assembly (3) is provided on one side of the housing assembly (1). The detection assembly (2) is provided on one side of the impeller assembly (4). The detection assembly (2) is used to detect the distribution of powder agglomeration in the discharge port (122). The housing assembly (1) includes a housing; The top of the housing (12) is provided with a feed inlet (121), and the side of the housing (12) away from the motor housing (13) is provided with a discharge outlet (122). The detection component (2) includes an electrode needle (21), an electrode plate (22), and a connecting block (23). The electrode needle (21) is located inside the discharge port (122) of the housing (12). There are several electrode needles (21). The electrode needles (21) are arranged in a ring at equal intervals along the inner wall of the discharge port (122). The electrode plate (22) is provided on the side of the electrode needle (21) away from the blade (41). The connecting block (23) is provided on the side of the electrode plate (22) away from the electrode needle (21). The connecting block (23) is fixedly connected to the electrode plate (22). The connecting block (23) is located on the inner wall of the discharge port (122). The inner wall of the discharge port (122) is provided with a sliding groove (123). The connecting block (23) is slidably connected to the sliding groove (123). A tension spring (24) is provided on the side of the connecting block (23) close to the electrode needle (21).

2. The high-flow-rate centrifugal fan for powder air distribution according to claim 1, characterized in that: The housing assembly (1) further includes a support frame (11) and a motor housing (13). The support frame (11) is located on a horizontal ground and has feet at the bottom. The housing (12) is located inside the support frame (11) and is fixedly connected to the support frame (11) at the bottom. The motor housing (13) is located on one side of the housing (12) and is fixedly connected to the housing (12).

3. The high-flow-rate centrifugal fan for powder air distribution according to claim 2, characterized in that: Flanges (14) are provided outside the discharge port (122) and the inlet port (121).

4. The high-flow-rate centrifugal fan for powder air distribution according to claim 3, characterized in that: A coil (25) is provided on one side of the inner wall of the groove (123). One end of the coil (25) is fixedly connected to the inner wall of the groove (123). A magnetic column (26) is provided inside the coil (25). One end of the magnetic column (26) is rotatably connected to the inner wall of the groove (123). A screw (27) is provided at the other end of the magnetic column (26). The screw (27) is fixedly connected to the magnetic column (26). The bottom end of the connecting block (23) is sleeved on the body of the screw (27).

5. The high-flow-rate centrifugal fan for powder air distribution according to claim 4, characterized in that: The drive assembly (3) includes a rotating motor (31), a main pulley (32) and a secondary pulley (33). The rotating motor (31) is located at the top of the support frame (11). The fixed end of the rotating motor (31) is fixedly connected to the support frame (11). The main pulley (32) is located at the output end of the rotating motor (31). The secondary pulley (33) is located in the motor housing (13). The secondary pulley (33) is rotatably connected to the motor housing (13). The main pulley (32) and the secondary pulley (33) are connected by a belt.

6. The high-flow-rate centrifugal fan for powder air distribution according to claim 5, characterized in that: The main pulley (32) is provided with a cover (34), which is sleeved on the main pulley (32) and the auxiliary pulley (33). The inner wall of the cover (34) is rotatably connected to the main pulley (32) and the auxiliary pulley (33) respectively. A dustproof net (35) is provided on one side of the cover (34), and the dustproof net (35) is fastened to the cover (34).

7. The high-flow-rate centrifugal fan for powder air distribution according to claim 6, characterized in that: The impeller assembly (4) includes blades (41), a drive shaft (42) and a dust cover (43). The blades (41) are located inside the housing (12). The drive shaft (42) is located on the side of the blades (41) away from the discharge port (122). One end of the drive shaft (42) is fixedly connected to the blades (41). The other end of the drive shaft (42) passes through the housing (12) and is located at the top of the motor housing (13). The end of the drive shaft (42) away from the blades (41) is fixedly connected to the auxiliary pulley (33). The dust cover (43) is located at the top of the motor housing (13) and is fixedly connected to the top of the motor housing (13).

Images