Multi-wing centrifugal ventilator

Abstract

The utility model relates to the technical field of ventilators, and discloses a multi-wing centrifugal ventilator which comprises a base, a volute is fixedly installed on the top of the base, a motor is fixedly installed on the top of the base, and the motor is fixedly installed on the rear side of the volute. The fastening relation of the second fastener to the control block is canceled through rotation of the second fastener, then the control block drives the first mounting plate to rotate through rotation of the control block, the blades are further made to slide along the limiting grooves, and finally the second mounting plate drives the other sides of the blades to rotate through the connection relation of the connecting columns. Compared with a traditional device, according to the device, the inclination angles of the front sides and the rear sides of the blades are synchronously changed through rotation of the control blocks, the control blocks are fixed through second fasteners, the blades are adjusted more conveniently and rapidly, frequent rotation of the single blades is not needed, and the adjusting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilators, and more specifically, to a multi-blade centrifugal ventilator. Background Art

[0002] A multi-blade centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It uses a high-speed rotating impeller to accelerate the gas, then slow it down and change the flow direction, converting kinetic energy into pressure, thereby achieving functions such as ventilation or dust removal.

[0003] Blades are an important factor affecting fan performance, and a multi-blade centrifugal fan has multiple sets of blades installed on its impeller, generally between eight and sixteen blades, and the installation angle of the blades determines the airflow volume and wind pressure. When the blades are in the most bent state, the air volume is large, and when the blades are in the most upright state, the air volume is small. When the current multi-blade centrifugal fans adjust the blade angle according to actual needs, they need to frequently adjust and calibrate a single set of blades. Due to the large number of blades, the workload will be increased, and it is impossible to ensure that the inclination angle of each set of blades is consistent, which reduces the performance of the fan. Therefore, they need to be improved and optimized. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a multi-blade centrifugal fan having the advantages of controllable wind pressure and high flexibility.

[0005] To achieve the above object, the utility model provides the following technical solution: a multi-blade centrifugal fan, comprising a base, a volute is fixedly mounted on the top of the base, a motor is fixedly mounted on the top of the base, and the motor is fixedly mounted on the rear side of the volute;

[0006] An impeller 1 is rotatably mounted on the rear side of the volute, and an impeller 2 is rotatably mounted on the front side of the volute. Fixing holes are fixedly provided on the outer surfaces of the impellers 1 and 2, and blades are rotatably mounted inside the two groups of the fixing holes. Limiting grooves are fixedly provided on the outer surfaces of the impellers 1 and 2, and the limiting grooves are located on the outsides of the fixing holes, and the front and rear ends of the blades are movably mounted inside the limiting grooves. A fixing cylinder is fixedly mounted on the front side of the impeller 1, and a mounting plate 1 is rotatably mounted inside the impeller 1. One end of the blade penetrates through the back of the mounting plate 1 and is fixedly connected to a fastener 1. The output shaft of the motor is fixedly connected to the impeller 1.

[0007] As a preferred technical solution of the utility model, an air inlet is fixedly installed on the front of the volute, and an isolation net is detachably installed inside the air inlet;

[0008] Inside the air inlet, a storage bin is fixedly provided. There are two groups of the storage bins, located on the left and right sides of the air inlet. A fixed head is movably installed inside the storage bin. One end of the fixed head is elastically connected to the inner wall of the storage bin through a spring. The fixed head abuts against the installation bin, and the installation bin is fixedly provided on the outer wall of the isolation net.

[0009] As a preferred technical solution of the present utility model, a control block is fixedly installed on the front side of the first installation plate. The control block is rotatably installed inside the fixed cylinder. Rotating grooves are fixedly provided on the left and right sides of the control block. A display board is fixedly installed on the front side of the control block.

[0010] As a preferred technical solution of the present utility model, fixing rods are fixedly installed on the left and right sides of the fixed cylinder. One end of the fixing rod penetrates through the rotating groove and is threadedly sleeved with the second fastener.

[0011] As a preferred technical solution of the present utility model, a second installation plate is rotatably installed inside the second impeller. One end of the front side of the blade penetrates to the outer wall of the second installation plate and is fixedly connected to the third fastener. The third fastener is fixedly installed on the front side of the second installation plate.

[0012] As a preferred technical solution of the present utility model, connecting columns are fixedly installed at the upper and lower ends of the control block. One end of the connecting column is fixedly connected to the second installation plate.

[0013] As a preferred technical solution of the present utility model, there are eighteen groups of blades, which are all arranged circumferentially between the first impeller and the second impeller.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By rotating the second fastener of the present utility model, the fastening relationship between the second fastener and the control block is cancelled. Then, by rotating the control block, the control block drives the first installation plate to rotate. Further, the blade slides along the limiting groove. Finally, through the connection relationship of the connecting column, the second installation plate drives the other side of the blade to rotate. At this time, the inclination angle of the blade changes. Compared with the traditional device, by rotating the control block of this device, the inclination angles of the front and rear sides of the blade change synchronously. And through the setting of the second fastener, the control block is fixed, making the adjustment of the blade more convenient and fast, without the need to frequently rotate individual blades, improving the adjustment efficiency.

[0016] 2. The utility model uses the elastic potential energy of the spring to drive the fixed head and the installation bin to come into contact with each other to complete the fixation, and the isolation net can be pulled out to store the fixed head into the storage bin to complete the removal. Compared with the traditional device, the device uses the elastic potential energy of the spring to make the fixed head and the installation bin come into contact with each other, further making the disassembly and assembly of the isolation net faster, isolating impurities while facilitating the adjustment of the blades, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the volute structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the air inlet structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the blade structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the impeller of the utility model;

[0022] Figure 6 This is a structural schematic diagram of a mounting plate of the utility model;

[0023] Figure 7 This is a schematic diagram of the control block structure of the utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the fixed head of the utility model.

[0025] In the figure: 1. base; 2. volute; 3. motor; 4. impeller 1; 5. impeller 2; 6. blades; 7. fixing hole; 8. limit slot; 9. mounting plate 1; 10. fastener 1; 11. control block; 12. fixing cylinder; 13. rotating slot; 14. fixing rod; 15. fastener 2; 16. display panel; 17. connecting column; 18. mounting plate 2; 19. fastener 3; 20. air inlet; 21. isolation net; 22. storage bin; 23. fixing head; 24. spring; 25. mounting bin. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] likeFigures 1 to 8 As shown in the figure, the present utility model provides a multi-wing centrifugal ventilator, which includes a base 1. A volute 2 is fixedly installed on the top of the base 1, and a motor 3 is fixedly installed on the top of the base 1. The motor 3 is fixedly installed at the rear side of the volute 2;

[0028] A first impeller 4 is rotatably installed at the rear side inside the volute 2, and a second impeller 5 is rotatably installed at the front side inside the volute 2. Fixing holes 7 are fixedly formed on the outer surfaces of the first impeller 4 and the second impeller 5, and blades 6 are rotatably installed inside the two groups of fixing holes 7. Limiting grooves 8 are fixedly formed on the outer surfaces of the first impeller 4 and the second impeller 5. The limiting grooves 8 are located outside the fixing holes 7, and the front and rear ends of the blades 6 are movably installed inside the limiting grooves 8. A fixing cylinder 12 is fixedly installed on the front side of the first impeller 4. A first mounting plate 9 is rotatably installed inside the first impeller 4. One end of the blade 6 penetrates to the back of the first mounting plate 9 and is fixedly connected to a first fastener 10. The output shaft of the motor 3 is fixedly connected to the first impeller 4.

[0029] When ventilation work needs to be carried out, the staff places the base 1 in a suitable position and makes the orientation of the volute 2 correct. Then the motor 3 is started to make the first impeller 4 and the second impeller 5 rotate. At this time, the blades 6 between the first impeller 4 and the second impeller 5 start the air supply operation. When the air pressure and volume need to be adjusted, the staff pulls out the isolation net 21 outward. At this time, the fixing head 23 is squeezed and stored inside the storage bin 22, and after the disassembly is completed, the elastic potential energy of the spring 24 drives the fixing head 23 to reset. Then the staff rotates the second fasteners 15 to make the two groups of second fasteners 15 displace along the fixing rods 14, so that the second fasteners 15 cancel the fastening relationship with the control block 11. Then the staff can observe the display board 16. At this time, the inclination angle of the display board 16 represents the inclination angle of the blades 6. At this time, the staff rotates the control block 11 to make the control block 11 drive the first mounting plate 9 to rotate. The rotation of the first mounting plate 9 drives the first fastener 10 to rotate, further making the blade 6 slide along the limiting groove 8. At the same time, the rotation of the control block 11 makes the connecting column 17 rotate, and the rotation of the connecting column 17 drives the second mounting plate 18 to rotate, further making the second mounting plate 18 drive the other side of the blade 6 to rotate, so that the inclination angle of the blade 6 changes. Then the staff rotates the second fasteners 15 to make the second fasteners 15 fix the control block 11 again. Finally, the staff can reinstall the isolation net 21 into the air inlet 20. At this time, through the elastic potential energy of the spring 24, the fixing head 23 and the installation bin 25 are mutually abutted to complete the fixation.

[0030] By rotating the second fastener 15, the fastening relationship between the second fastener 15 and the control block 11 is cancelled. Then, by rotating the control block 11, the control block 11 drives the first mounting plate 9 to rotate, further causing the blade 6 to slide along the limiting groove 8. Finally, through the connection relationship of the connecting column 17, the second mounting plate 18 drives the other side of the blade 6 to rotate. At this time, the inclination angle of the blade 6 changes. Compared with the traditional device, by rotating the control block 11, the inclination angles of the front and rear sides of the blade 6 change synchronously. And through the setting of the second fastener 15, the control block 11 is fixed, making the adjustment of the blade 6 more convenient and fast, without the need to frequently rotate a single blade 6, improving the adjustment efficiency.

[0031] Wherein, an air inlet 20 is fixedly installed on the front surface of the volute 2, and an isolation net 21 is detachably installed inside the air inlet 20;

[0032] A storage bin 22 is fixedly opened inside the air inlet 20. There are two groups of storage bins 22, and they are located on the left and right sides of the air inlet 20. A fixing head 23 is movably installed inside the storage bin 22. One end of the fixing head 23 and the inner wall of the storage bin 22 are elastically connected by a spring 24. The fixing head 23 abuts against the installation bin 25, and the installation bin 25 is fixedly opened on the outer wall of the isolation net 21.

[0033] The staff pulls out the isolation net 21 outward. At this time, the fixing head 23 is squeezed and received inside the storage bin 22. And after the disassembly is completed, the elastic potential energy of the spring 24 drives the fixing head 23 to reset. Then the staff can reinstall the isolation net 21 inside the air inlet 20. At this time, through the elastic potential energy of the spring 24, the fixing head 23 and the installation bin 25 abut against each other to complete the fixation.

[0034] Through the elastic potential energy of the spring 24, the fixing head 23 and the installation bin 25 are driven to abut against each other to complete the fixation. And the fixing head 23 can be received inside the storage bin 22 by pulling the isolation net 21 outward to complete the removal. Compared with the traditional device, through the elastic potential energy of the spring 24, the fixing head 23 and the installation bin 25 abut against each other, further making the disassembly and assembly of the isolation net 21 faster. While being able to isolate impurities, it is convenient to adjust the blade 6, improving the work efficiency.

[0035] Wherein, a control block 11 is fixedly installed on the front side of the first mounting plate 9. The control block 11 is rotatably installed inside the fixed cylinder 12. Rotating grooves 13 are fixedly opened on the left and right sides of the control block 11. A display board 16 is fixedly installed on the front side of the control block 11.

[0036] The staff can observe the display board 16. At this time, the inclination angle of the display board 16 represents the inclination angle of the blade 6.

[0037] Among them, fixed rods 14 are fixedly installed on the left and right sides of the fixed cylinder 12. One end of the fixed rod 14 penetrates through the rotation groove 13 and is threadedly sleeved with the second fastener 15.

[0038] The second fastener 15 fixes the control block 11, and the operator can rotate the second fastener 15 to displace the two second fasteners 15 along the fixed rod 14, so that the second fastener 15 cancels the fastening relationship with the control block 11.

[0039] Among them, a second mounting plate 18 is rotatably installed inside the second impeller 5. One end of the front side of the blade 6 penetrates to the outer wall of the second mounting plate 18 and is fixedly connected to the third fastener 19. The third fastener 19 is fixedly installed on the front side of the second mounting plate 18.

[0040] Among them, connecting columns 17 are fixedly installed at the upper and lower ends of the control block 11. One end of the connecting column 17 is fixedly connected to the second mounting plate 18.

[0041] The rotation of the control block 11 causes the connecting column 17 to rotate. The rotation of the connecting column 17 drives the second mounting plate 18 to rotate, further causing the second mounting plate 18 to drive the other side of the blade 6 to rotate, so that the inclination angle of the blade 6 changes.

[0042] Among them, there are eighteen groups of blades 6, which are all arranged in a circumferential pattern between the first impeller 4 and the second impeller 5.

[0043] The working principle and usage process of the present utility model:

[0044] When ventilation work is required, the staff place the base 1 in a suitable position and ensure that the orientation of the volute 2 is correct. Then, the motor 3 is started to rotate the impeller one 4 and the impeller two 5. At this time, the blades 6 between the impeller one 4 and the impeller two 5 start the air supply operation. When it is necessary to adjust the air pressure and volume, the staff pull out the isolation net 21 outward. At this time, the fixed head 23 is squeezed and stored inside the storage bin 22. And after the disassembly is completed, the elastic potential energy of the spring 24 drives the fixed head 23 to reset. Then, the staff rotate the fastener two 15, so that the two groups of fasteners two 15 displace along the fixed rod 14, canceling the fastening relationship between the fastener two 15 and the control block 11. Then, the staff can observe the display board 16. At this time, the inclination angle of the display board 16 represents the inclination angle of the blade 6. At this time, the staff rotate the control block 11, so that the control block 11 drives the mounting plate one 9 to rotate. The rotation of the mounting plate one 9 drives the fastener one 10 to rotate, further causing the blade 6 to slide along the limit groove 8. At the same time, the rotation of the control block 11 causes the connecting column 17 to rotate. The rotation of the connecting column 17 drives the mounting plate two 18 to rotate, further causing the mounting plate two 18 to drive the other side of the blade 6 to rotate, changing the inclination angle of the blade 6. Then, the staff rotate the fastener two 15 to fix the control block 11 again. Finally, the staff can reinstall the isolation net 21 into the air inlet 20. At this time, through the elastic potential energy of the spring 24, the fixed head 23 and the installation bin 25 are in contact with each other to complete the fixation.

[0045] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand 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 multi-wing centrifugal fan, comprising a base (1), characterized in that: The top of the base (1) is fixedly installed with a volute (2), and the top of the base (1) is fixedly installed with a motor (3), and the motor (3) is fixedly installed at the rear side of the volute (2); A first impeller (4) is rotatably installed at the rear side inside the volute (2), a second impeller (5) is rotatably installed at the front side inside the volute (2), fixing holes (7) are fixedly formed on the outer surfaces of the first impeller (4) and the second impeller (5), and blades (6) are rotatably installed inside the two groups of fixing holes (7). Limiting grooves (8) are fixedly formed on the outer surfaces of the first impeller (4) and the second impeller (5), the limiting grooves (8) are located outside the fixing holes (7), and the front and rear ends of the blades (6) are movably installed inside the limiting grooves (8). A fixing cylinder (12) is fixedly installed at the front side of the first impeller (4), a first mounting plate (9) is rotatably installed inside the first impeller (4), one end of the blade (6) penetrates to the back of the first mounting plate (9) and is fixedly connected to a first fastener (10), and the output shaft of the motor (3) is fixedly connected to the first impeller (4).

2. The multi-wing centrifugal ventilator according to claim 1, wherein: An air inlet (20) is fixedly installed on the front surface of the volute (2), and an isolation net (21) is detachably installed inside the air inlet (20); A storage bin (22) is fixedly formed inside the air inlet (20), there are two groups of the storage bins (22), and they are located on the left and right sides of the air inlet (20). A fixing head (23) is movably installed inside the storage bin (22), one end of the fixing head (23) is elastically connected to the inner wall of the storage bin (22) through a spring (24), the fixing head (23) abuts against an installation bin (25), and the installation bin (25) is fixedly formed on the outer wall of the isolation net (21).

3. A multi-wing centrifugal ventilator according to claim 1, characterized in that: A control block (11) is fixedly installed on the front side of the first mounting plate (9), the control block (11) is rotatably installed inside the fixing cylinder (12), rotating grooves (13) are fixedly formed on the left and right sides of the control block (11), and a display board (16) is fixedly installed on the front side of the control block (11).

4. A multi-wing centrifugal ventilator according to claim 1, characterized in that: Fixing rods (14) are fixedly installed on the left and right sides of the fixing cylinder (12), one end of the fixing rod (14) penetrates through the rotating groove (13) and is threadedly sleeved with a second fastener (15).

5. The multi-wing centrifugal ventilator according to claim 1, characterized in that: A second mounting plate (18) is rotatably installed inside the second impeller (5), the front end of one side of the blade (6) penetrates to the outer wall of the second mounting plate (18) and is fixedly connected to a third fastener (19), and the third fastener (19) is fixedly installed on the front side of the second mounting plate (18).

6. The multi-wing centrifugal ventilator according to claim 3, characterized in that: Connecting columns (17) are fixedly installed on the upper and lower ends of the control block (11), and one end of the connecting column (17) is fixedly connected to the second mounting plate (18).

7. The multi-wing centrifugal ventilator according to claim 1, wherein: There are eighteen groups of the blades (6), and they are all arranged in a circular pattern between the first impeller (4) and the second impeller (5).

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