Dust removal fan controlled by frequency converter

Abstract

The utility model discloses a frequency converter control dust removal fan, which comprises a shell, a variable frequency motor, a first rotating shaft and fan blades, the first rotating shaft is rotatably arranged in the shell, the fan blades are fixedly arranged on the first rotating shaft, the variable frequency motor is in transmission connection with the first rotating shaft, a filter device is arranged in the shell, and the filter device comprises a fixing frame and a filter screen. And a second rotating shaft is rotationally installed in the shell and rotationally connected with the center connecting block, a sealing plate and a sealing shell are installed on the second rotating shaft, a cleaning brush is installed in the sealing shell, and a chip removal opening is formed in the position, under the sealing shell, of the bottom of the shell. Through rotation of the sealing plate and the sealing shell, the suction force of the filter screen between the sealing plate and the sealing shell disappears, impurities on the filter screen are removed under the action of the cleaning brush and gravity, and finally the impurities fall off and are discharged from the chip removal opening. The filter screen can be automatically cleaned without shutdown, time and labor are saved, and the air quality of a textile workshop is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal fans, in particular to a frequency converter-controlled dust removal fan. Background Art

[0002] Since a large amount of dust and cotton wool is generated during the weaving process of cotton yarn, the air quality is poor, which will cause harm to the health of textile workers. In order to reduce the dust and cotton wool inside the workshop, existing textile workshops generally use dust removal fans to inhale and discharge the dust and cotton wool floating in the air in the workshop.

[0003] When the dust removal fan is performing ventilation operations, a lot of textile debris will enter the interior of the fan and easily come into contact with the motor and cables, posing a safety hazard. To avoid this, a filter can be installed, and the impurities in the air can be separated by the filter mesh in conjunction with the rotation of the fan, so that the air is discharged outward through the filter mesh, and the impurities are adsorbed in the filter mesh and the filter holes. However, as the working time increases, more and more impurities will adhere to the filter mesh. When cleaning the filter mesh, it is necessary to stop the machine to clean the filter mesh, otherwise the impurities will continue to be adsorbed on the filter mesh under the negative pressure generated by the fan. Cleaning the filter mesh is time-consuming and labor-intensive, and long downtimes will affect the air quality in the textile workshop.

[0004] It should be noted that the above content falls within the technical knowledge of the inventor and does not necessarily constitute prior art. Utility Model Content

[0005] Based on this, it is necessary to provide a frequency converter to control the dust removal fan in response to the above technical problems.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a frequency converter controlled dust removal fan, comprising a housing, a frequency conversion motor, a first rotating shaft and fan blades, the housing is a cylindrical structure with open ends, the first rotating shaft is rotatably mounted in the housing, the fan blades are fixedly mounted on the first rotating shaft, the frequency conversion motor is transmission-connected to the first rotating shaft, a filter device is installed in the housing, the filter device comprises a fixing frame and a filter screen, the fixing frame is composed of a central connecting block and a fixing rod fixed on the central connecting block and distributed in a circumference, the fixing rod is fixedly connected to the inner wall of the housing, and the fixing frame and the housing form a plurality of The fan-shaped area has a filter fixed therein, and the fixing frame is fixedly connected to the inner wall of the shell; a second rotating shaft is rotatably installed in the shell, and the second rotating shaft is rotatably connected to the central connecting block, and a sealing plate and a sealing shell are installed on the second rotating shaft, and the sealing plate and the sealing shell are both fan-shaped, the sealing plate is located on the side of the filter device facing away from the air inlet end of the shell, and the sealing shell is located on the side of the filter device facing the air inlet end of the shell, the sealing plate and the sealing shell are both slidingly and sealingly connected to the fixing frame and the shell, and a cleaning brush is installed in the shell, and the cleaning brush is in contact with the filter; a chip discharge port is provided at the bottom of the shell and directly below the sealing shell.

[0007] Optionally, a first mounting bracket is fixed on the top of the shell, the variable frequency motor is installed on the first mounting bracket, a driving pulley is installed at the output end of the variable frequency motor, a driven pulley is installed on the first rotating shaft, and the driving pulley and the driven pulley are connected by a transmission belt.

[0008] Optionally, the thickness of the filter screen is the same as that of the fixing rod, and the end surfaces on both sides of the filter screen are flush with the central connecting block and the end surfaces on both sides of the fixing rod.

[0009] Optionally, a chip removal channel is installed at the bottom of the chip removal opening.

[0010] Optionally, a second mounting bracket is installed on the top of the shell, and a reduction motor is installed on the second mounting bracket. A transmission box is fixed in the shell, and a driving bevel gear and a driven bevel gear are provided in the transmission box. A third rotating shaft is rotatably installed on the transmission box, one end of the third rotating shaft is located in the transmission box and is connected to the driving bevel gear, and the other end of the third rotating shaft extends to above the top of the shell and is connected to the output end of the reduction motor through a coupling, and one end of the second rotating shaft extends into the transmission box and is connected to the driven bevel gear, and the driving bevel gear and the driven bevel gear are meshed and connected.

[0011] Optionally, protective nets are installed at both ends of the shell.

[0012] Optionally, the horizontal projections of the sealing plate and the sealing shell coincide with each other, and the arc side lengths of the sealing plate and the sealing shell are both greater than twice the arc side length of the filter screen.

[0013] The beneficial effects of this technical solution are as follows: by setting a fixed frame and multiple filter screens, and rotating the sealing plate and the sealing shell, the suction force of the filter screen between the sealing plate and the sealing shell is reduced, and the impurities on the filter screen are removed by the cleaning brush and gravity, and finally fall out and discharged from the chip discharge port; the filter screen is automatically cleaned without stopping the machine, which saves time and effort and ensures the air quality in the textile workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0015] Figure 2 for Figure 1 Sectional view along line AA;

[0016] Figure 3 for Figure 1 Cross-sectional view along line BB;

[0017] Figure 4 This is a working state diagram of an embodiment of the utility model;

[0018] In the figure, 1. housing; 2. frequency conversion motor; 3. first rotating shaft; 4. fan blades; 5. fixing bracket; 51. center connecting block; 52. fixing rod; 6. filter screen; 7. second rotating shaft; 8. sealing plate; 9. sealing shell; 10. cleaning brush; 11. chip discharge port; 12. first mounting bracket; 13. driving pulley; 14. driven pulley; 15. transmission belt; 16. chip discharge channel; 17. second mounting bracket; 18. reduction motor; 19. transmission box; 20. driving bevel gear; 21. driven bevel gear; 22. third rotating shaft; 23. protective net. DETAILED DESCRIPTION

[0019] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] See also Figures 1 to 4 The embodiment of the present application provides a frequency converter controlled dust removal fan, including a housing 1, a frequency conversion motor 2, a first rotating shaft 3 and fan blades 4. The housing 1 is a cylindrical structure with two ends open. The first rotating shaft 3 is rotatably mounted in the housing 1 through a bearing. The fan blades 4 are fixedly mounted on the first rotating shaft 3. The frequency conversion motor 2 is transmission-connected to the first rotating shaft 3. A filter device is installed in the housing 1. The filter device includes a fixing frame 5 and a filter screen 6. The fixing frame 5 is composed of a central connecting block 51 and a fixing rod 52 fixed on the central connecting block 51 and distributed in a circumference. The fixing rod 52 is fixedly connected to the inner wall of the housing 1. The fixing frame 5 and the housing 1 enclose a plurality of fan-shaped areas. The fan-shaped areas A filter screen 6 is fixed in the area, and the fixing frame 5 is fixedly connected to the inner wall of the shell 1; a second rotating shaft 7 is rotatably installed in the shell 1 through a bearing, and the second rotating shaft 7 is rotatably connected to the central connecting block 51. A sealing plate 8 and a sealing shell 9 are installed on the second rotating shaft 7, and the sealing plate 8 and the sealing shell 9 are both fan-shaped. The sealing plate 8 is located on the side of the filter device facing away from the air inlet end of the shell 1, and the sealing shell 9 is located on the side of the filter device facing the air inlet end of the shell 1. The sealing plate 8 and the sealing shell 9 are both slidably and sealedly connected to the fixing frame 5 and the shell 1, and a cleaning brush 10 is installed in the sealing shell 9, which contacts and cooperates with the filter screen 6; a chip discharge port 11 is provided at the bottom of the shell 1 and directly below the sealing shell 9.

[0021] To facilitate the rotation of the first rotating shaft 3, a first mounting bracket 12 is fixed to the top of the housing 1. The variable frequency motor 2 is mounted on the first mounting bracket 12. A driving pulley 13 is mounted on the output end of the variable frequency motor 2. A driven pulley 14 is mounted on the first rotating shaft 3. The driving pulley 13 and the driven pulley 14 are connected by a transmission belt 15. The top of the housing 1 has an opening through which the belt passes. The variable frequency motor 2 can adjust its speed via a frequency converter, thereby adjusting the air volume and dust removal effect. The variable frequency motor 2 drives the driving pulley 13 to rotate, and the driving pulley 13 drives the driven pulley 14 and the first rotating shaft 3 to rotate via the transmission belt 15.

[0022] To facilitate the sliding connection between the housing 9 and the fixing rod 52 while allowing the cleaning brush 10 to contact the filter 6, the thickness of the filter 6 is set to be the same as that of the fixing rod 52, and the end surfaces of the filter 6 are flush with the central connecting block 51 and the end surfaces of the fixing rod 52. The cross-section of the fixing rod 52 is rectangular.

[0023] In order to facilitate the downward discharge of impurities discharged from the chip discharge port 11, a chip discharge channel 16 is installed at the bottom of the chip discharge port 11. The impurities at the chip discharge port 11 fall downward to the chip discharge channel 16 under gravity and are then discharged downward from the chip discharge channel 16.

[0024] To facilitate the rotation of the second rotating shaft 7, a second mounting bracket 17 is installed on the top of the housing 1. A reduction motor 18 is installed on the second mounting bracket 17. A transmission box 19 is fixed in the housing 1. The transmission box 19 is provided with a driving bevel gear 20 and a driven bevel gear 21. A third rotating shaft 22 is rotatably mounted on the transmission box 19 through a bearing. One end of the third rotating shaft 22 is located in the transmission box 19 and is connected to the driving bevel gear 20. The other end of the third rotating shaft 22 extends to the top of the housing 1 and is connected to the output end of the reduction motor 18 through a coupling. One end of the second rotating shaft 7 extends into the transmission box 19 and is connected to the driven bevel gear 21. The driving bevel gear 20 is meshed with the driven bevel gear 21. The reduction motor 18 drives the third rotating shaft 22 to rotate through the coupling. The third rotating shaft 22 drives the driven bevel gear 21 and the second rotating shaft 7 to rotate through the driving bevel gear 20.

[0025] In order to prevent people from entering the housing 1 and contacting with rotating parts, a protective net 23 is installed at both ends of the housing 1. By arranging the protective net 23, a protective effect can be played, and people can be prevented from accidentally entering the housing 1 and being injured.

[0026] The working principle of this embodiment is as follows:

[0027] When the filter screen is automatically cleaned without stopping the machine, a woven bag or other storage device needs to be installed at the chip discharge port 11 to collect impurities falling from the chip discharge port 11 in order to prevent the impurities from being blown into the workshop by wind and polluting the air in the textile workshop. The woven bag can be tied to the chip discharge port 11 with a cable tie.

[0028] The variable frequency motor 2 drives the first rotating shaft 3 to rotate, and the first rotating shaft 3 drives the fan blades 4 to rotate, so that negative pressure is formed at the air inlet end of the housing 1, and air is introduced into the housing 1. The filter 6 filters impurities in the air, and the impurities are attached to the filter 6 due to suction; the second rotating shaft 7 is driven to rotate by the reduction motor 18, and the second rotating shaft 7 drives the sealing plate 8 and the housing 9 to rotate, and the cleaning brush 10 cleans the filter 6;

[0029] In order to facilitate the cleaning of the filter 6, at least one filter 6 is surrounded, and the horizontal projections of the sealing plate 8 and the sealing shell 9 are overlapped, and the arc lengths of the sealing plate 8 and the sealing shell 9 are both greater than twice the arc lengths of the filter 6. In this way, at least one complete filter 6 is surrounded between the sealing plate 8 and the sealing shell 9. Through the sliding seal between the sealing plate 8, the sealing shell 9, the fixing frame 5, and the shell 1, the area between the sealing plate 8 and the sealing shell 9 forms a relatively closed area. The suction force of the filter 6 in this area disappears, and the arc surface of the sealing shell 9 and the shell 1 in contact and cooperation is open. The impurities originally adsorbed on the filter 6 will fall to the bottom of the area enclosed by the sealing shell 9 and the shell 1 under the contact cleaning action of the cleaning brush 10 and the action of gravity. When the sealing shell 9 rotates to the chip discharge port 11, the impurities fall from the chip discharge port 11 and are discharged into the woven bag.

[0030] When the machine is shut down for maintenance, the woven bag can be removed and the impurities inside can be cleaned out.

[0031] It should be noted that those skilled in the art may make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be based on the appended claims.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0033] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

Claims

1. A frequency converter controlled dust removal fan, comprising a housing (1), a frequency conversion motor (2), a first rotating shaft (3) and fan blades (4), wherein the housing (1) is a cylindrical structure with both ends open, the first rotating shaft (3) is rotatably mounted in the housing (1), the fan blades (4) are fixedly mounted on the first rotating shaft (3), the frequency conversion motor (2) is in driving connection with the first rotating shaft (3), and is characterized in that: The housing (1) is provided with a filter device, the filter device comprising a fixing frame (5) and a filter screen (6), the fixing frame (5) comprising a central connecting block (51) and fixing rods (52) fixed on the central connecting block (51) and distributed in a circumferential manner, the fixing rods (52) being fixedly connected to the inner wall of the housing (1), the fixing frame (5) and the housing (1) forming a plurality of sector-shaped areas, the filter screens (6) being fixed in each sector-shaped area, the fixing frame (5) being fixedly connected to the inner wall of the housing (1); a second rotating shaft (7) being rotatably installed in the housing (1), the second rotating shaft (7) being connected to the central connecting block (51) ) is rotatably connected, and a sealing plate (8) and a sealing shell (9) are installed on the second rotating shaft (7), and the sealing plate (8) and the sealing shell (9) are both fan-shaped. The sealing plate (8) is located on the side of the filter device facing away from the air inlet end of the shell (1), and the sealing shell (9) is located on the side of the filter device facing the air inlet end of the shell (1). The sealing plate (8) and the sealing shell (9) are both slidably and sealedly connected to the fixing frame (5) and the shell (1). A cleaning brush (10) is installed in the sealing shell (9), and the cleaning brush (10) is in contact with the filter screen (6); a chip discharge port (11) is provided at the bottom of the shell (1) and directly below the sealing shell (9).

2. The frequency converter controlled dust removal fan according to claim 1, characterized in that: A first mounting frame (12) is fixed on the top of the housing (1), the variable frequency motor (2) is mounted on the first mounting frame (12), a driving pulley (13) is mounted on the output end of the variable frequency motor (2), a driven pulley (14) is mounted on the first rotating shaft (3), and the driving pulley (13) and the driven pulley (14) are connected to each other through a transmission belt (15).

3. The frequency converter controlled dust removal fan according to claim 1, characterized in that: The thickness of the filter screen (6) is the same as that of the fixing rod (52), and the end surfaces on both sides of the filter screen (6) are flush with the end surfaces on both sides of the central connecting block (51) and the fixing rod (52).

4. The frequency converter controlled dust removal fan according to claim 1, characterized in that: A chip removal channel (16) is installed at the bottom of the chip removal opening (11).

5. The frequency converter controlled dust removal fan according to claim 1, characterized in that: A second mounting frame (17) is mounted on the top of the housing (1), a reduction motor (18) is mounted on the second mounting frame (17), a transmission box (19) is fixed in the housing (1), a driving bevel gear (20) and a driven bevel gear (21) are provided in the transmission box (19), a third rotating shaft (22) is rotatably mounted on the transmission box (19), one end of the third rotating shaft (22) is located in the transmission box (19) and is connected to the driving bevel gear (20), the other end of the third rotating shaft (22) extends to the top of the housing (1) and is connected to the output end of the reduction motor (18) through a coupling, one end of the second rotating shaft (7) extends into the transmission box (19) and is connected to the driven bevel gear (21), and the driving bevel gear (20) is meshed with the driven bevel gear (21).

6. The frequency converter controlled dust removal fan according to claim 1, characterized in that: Protective nets (23) are installed at both ends of the housing (1).

7. The frequency converter controlled dust removal fan according to claim 1, characterized in that: The horizontal projections of the sealing plate (8) and the sealing shell (9) coincide with each other, and the arc lengths of the sealing plate (8) and the sealing shell (9) are both greater than twice the arc length of the filter screen (6).

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