Centrifugal fan for blast pressurization

Abstract

The utility model relates to the technical field of centrifugal fans, and discloses a centrifugal fan for air blast pressurization, which comprises a bottom plate, a motor is fixedly connected onto the bottom plate, a belt pulley I is fixedly connected with the output end of the motor, a belt I is arranged on the belt pulley I, a belt pulley II is arranged on the belt I, and the belt pulley II is fixedly connected with the output end of the motor. According to the centrifugal fan, when the centrifugal fan for blowing and pressurizing is used, the centrifugal fan is driven by the motor and is transmitted by the belt wheels, so that the impeller rotates quickly, the rotating speed of the impeller is effectively increased, the pressure of gas is increased, the pressure of the gas is increased, the pressure of the gas is reduced, and the service life of the centrifugal fan is prolonged. The impeller is arranged on the volute, so that the pressure intensity of the blown gas is increased, the required intensity is achieved, the angles of the blades on the impeller are set to be small, the acting force borne by the gas flowing into the volute is larger, the pressure of the gas is further increased, it is ensured that the gas can keep high pressure intensity in the conveying process, and the requirements of different application scenes are met.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a centrifugal fan used for air blasting and pressurization. Background Art

[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air intake of boilers and industrial furnaces, cooling and ventilation in air conditioning equipment and household appliances, drying and selection of grains, wind tunnel wind sources and inflation and propulsion of hovercraft, etc.

[0003] The centrifugal fan for blast pressurization still has the following defects when in use: the gas blown out by the centrifugal fan when it is working contains dust, resulting in unclean gas; at the same time, the air pressure of the centrifugal fan is low, resulting in failure to meet the requirements when a stronger air pressure is needed, resulting in lower working efficiency; at the same time, it is inconvenient to disassemble the filter device, and it is not convenient for subsequent replacement and cleaning. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a centrifugal fan for air blasting and pressurization.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a centrifugal fan for blasting and pressurizing, comprising a base plate, a motor is fixedly connected to the base plate, a pulley one is fixedly connected to the output end of the motor, a belt one is provided on the pulley one, a pulley two is provided on the belt one, a rotating shaft is fixedly connected to the rotating shaft, a volute is rotatably connected to the rotating shaft, the volute is fixedly connected to the base plate, an impeller is fixedly connected to one end of the rotating shaft, an air outlet chamber is fixedly connected to one side of the volute, an air outlet is fixedly connected to the air outlet chamber, and an air inlet chamber is fixedly connected to the volute.

[0006] As a further description of the above technical solution: a fixing plate 1 is slidably connected in the air inlet chamber, a box body is fixedly connected to the fixing plate 1, a cylinder is rotatably connected to the box body, one end of the cylinder is fixedly connected to a handle 2, one end of the cylinder is fixedly connected to a gear, a rack is meshingly connected to the gear, a sliding rod is fixedly connected to the rack, the sliding rod is slidably connected to the box body, a spring is fixedly connected to the box body, one end of the spring is fixedly connected to the handle 2, a filter screen is provided on the fixing plate 1, a fixing plate 2 is provided on the filter screen, a bolt is slidably connected to the fixing plate 1, a nut is threadedly connected to the bolt, and the fixing plate 1 is fixedly connected to the handle 1.

[0007] As a further description of the above technical solution: a fixing plate 1 is fixedly connected to the base plate, a threaded screw is rotatably connected to the fixing plate 1, one end of the threaded screw is fixedly connected to a handle, an air inlet pipe is slidably connected to the fixing plate 1, a fixing plate 2 is fixedly connected to the air inlet pipe, the fixing plate 2 is slidably connected to the base plate, the fixing plate 2 is threadably connected to the threaded screw, one end of the air inlet pipe is attached to the air inlet cavity, and a mesh is fixedly connected to the air inlet pipe.

[0008] As a further description of the above technical solution: the bolt passes through the first fixing plate, the bolt passes through the filter screen, and the bolt passes through the second fixing plate.

[0009] As a further description of the above technical solution: the impeller is arranged in the volute, and the mesh is arranged in the air inlet pipe.

[0010] As a further description of the above technical solution: the bolts are provided in three groups, and the nuts are provided in three groups.

[0011] As a further description of the above technical solution: the filter screen is arranged between the first fixing plate and the second fixing plate, and the filter screen is arranged in the air inlet cavity.

[0012] The utility model has the following beneficial effects:

[0013] 1. In the utility model, when a centrifugal fan for blast pressurization is used, the impeller is driven by a motor and transmitted through a pulley, thereby realizing rapid rotation of the impeller, effectively increasing the speed of the impeller, thereby increasing the pressure of the gas, making the pressure of the blown gas larger and achieving the required strength. The blade angle on the impeller is set to be smaller, so that the gas flowing into the volute is subjected to a greater force, further increasing the pressure of the gas, ensuring that the gas can maintain a higher pressure during the transportation process, and meeting the needs of different application scenarios.

[0014] 2. In the utility model, when using a centrifugal fan for blast pressurization, a filter is provided in the air inlet chamber for filtering dust and impurities in the air when inhaling gas, thereby ensuring the cleanliness of the output gas. The filter can be easily detached from the fixing device by twisting the handle, pulling the first handle and the second handle, etc., so that the staff can replace or clean it conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a centrifugal fan for blasting and pressurizing proposed by the utility model Figure 1 ;

[0016] Figure 2 A schematic diagram of the structure of a centrifugal fan for blasting and pressurizing proposed by the utility model Figure 2 ;

[0017] Figure 3 This is a cross-sectional view of a centrifugal fan for air blasting and pressurization proposed by the utility model;

[0018] Figure 4 This is a partial exploded view of a centrifugal fan for air blasting and pressurization proposed by the utility model.

[0019] Legend:

[0020] 1. Base plate; 2. Motor; 3. Pulley 1; 4. Belt 1; 5. Pulley 2; 6. Impeller; 7. Volute; 8. Air outlet chamber; 9. Air outlet; 10. Rotating shaft; 11. Air inlet chamber; 12. Fixed plate 1; 13. Box; 14. Cylinder; 15. Gear; 16. Rack; 17. Slide bar; 18. Spring; 19. Handle 1; 20. Filter; 21. Fixed plate 2; 22. Bolt; 23. Nut; 24. Fixed plate 1; 25. Threaded screw; 26. Handle; 27. Air inlet pipe; 28. Fixed plate 2; 29. ​​Mesh; 30. Handle 2. DETAILED DESCRIPTION

[0021] 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.

[0022] Reference Figure 1-Figure 4 The utility model provides an embodiment: a centrifugal fan for blasting and pressurizing, comprising a bottom plate 1, a motor 2 is fixedly connected to the bottom plate 1, a pulley 3 is fixedly connected to the output end of the motor 2, a belt 4 is provided on the pulley 3, a pulley 2 5 is fixedly connected to the pulley 2 5, a rotating shaft 10 is rotatably connected to the rotating shaft 10 with a volute 7, the volute 7 is fixedly connected to the bottom plate 1, an impeller 6 is fixedly connected to one end of the rotating shaft 10, an air outlet chamber 8 is fixedly connected to one side of the volute 7, and an air outlet is fixedly connected to the air outlet chamber 8 9. An air inlet chamber 11 is fixedly connected to the volute 7. When a centrifugal fan for blast pressurization is used, it is driven by the motor 2 and transmitted through the pulley to achieve rapid rotation of the impeller 6, effectively increasing the speed of the impeller 6, thereby increasing the pressure of the gas, making the pressure of the blown gas larger and achieving the required strength. The blade angle on the impeller 6 is set to be smaller, so that the gas flowing into the volute 7 is subjected to a greater force, further increasing the pressure of the gas, ensuring that the gas can maintain a high pressure during the transportation process, and meeting the needs of different application scenarios.

[0023] A fixing plate 12 is slidably connected in the air inlet chamber 11, a box 13 is fixedly connected to the fixing plate 12, a cylinder 14 is rotatably connected to the box 13, one end of the cylinder 14 is fixedly connected to a handle 2 30, one end of the cylinder 14 is fixedly connected to a gear 15, a rack 16 is meshedly connected to the gear 15, a slide bar 17 is fixedly connected to the rack 16, the slide bar 17 is slidably connected to the box 13, a spring 18 is fixedly connected to the box 13, one end of the spring 18 is fixedly connected to the handle 2 30 0, a filter screen 20 is provided on the fixing plate 12, a fixing plate 21 is provided on the filter screen 20, a bolt 22 is slidably connected to the fixing plate 12, a nut 23 is threadedly connected to the bolt 22, a handle 19 is fixedly connected to the fixing plate 12, a fixing plate 24 is fixedly connected to the bottom plate 1, a threaded screw 25 is rotatably connected to the fixing plate 124, one end of the threaded screw 25 is fixedly connected to a handle 26, an air inlet pipe 27 is slidably connected to the fixing plate 12, and a nut 23 is threadedly connected to the bolt 22, a handle 19 is fixedly connected to the fixing plate 12, a fixing plate 24 is fixedly connected to the bottom plate 1, a threaded screw 25 is rotatably connected to the fixing plate 124, one end of the threaded screw 25 is fixedly connected to the handle 26, an air inlet pipe 27 is slidably connected to the fixing plate 124, and a nut 23 is threadedly connected to the bolt 22, a handle 19 is fixedly connected to the fixing plate 12, a fixing plate 24 is fixedly connected to the bottom plate 1, a threaded screw 25 is rotatably connected to the fixing plate 124, and a handle 26 is fixedly connected to the handle 26. The fixed plate 28 is fixedly connected, the fixed plate 28 is slidably connected to the bottom plate 1, the fixed plate 28 is threadedly connected to the threaded screw 25, one end of the air inlet pipe 27 is attached to the air inlet cavity 11, and the air inlet pipe 27 is fixedly connected with a mesh 29, the bolt 22 penetrates the fixed plate 12, the bolt 22 penetrates the filter 20, the bolt 22 penetrates the fixed plate 21, the impeller 6 is arranged in the volute 7, the mesh 29 is arranged in the air inlet pipe 27, the bolt 22 is provided with three groups, and the nut 23 is provided with three groups The filter screen 20 is arranged between the fixing plate 12 and the fixing plate 21, and the filter screen 20 is arranged in the air inlet chamber 11. When the centrifugal fan with air blowing and pressurization is used, the filter screen 20 is arranged in the air inlet chamber 11, which is used to filter the dust and impurities in the air when the gas is inhaled, thereby ensuring the cleanliness of the output gas. By twisting the handle 26, pulling the handle 19 and the handle 30, etc., the filter screen 20 can be easily separated from the fixing device, which is convenient for the staff to replace or clean it.

[0024] Working principle: When using a centrifugal fan for blast pressurization, the staff first transports the device to the required site, then connects the air outlet 9 to the device used through a hose, and then turns on the motor 2, which drives the pulley 3 to rotate, the pulley 3 drives the belt 4 to rotate, the belt 4 drives the pulley 25 to rotate, the pulley 25 drives the rotating shaft 10 to rotate on the volute 7, the rotating shaft 10 drives the impeller 6 to rotate, the rotation of the impeller 6 inhales the wind through the sliding rod 17 and the air inlet chamber 11, and then transports it into the device used through the air outlet chamber 8 and the air outlet 9, and the blade angle on the impeller 6 is set to be small, and the air flowing into the volute The greater the force applied to the gas in the shell 7, the greater the pressure of the gas. At the same time, the diameter of the pulley 1 3 is larger than that of the pulley 2 5. When the pulley 1 3 drives the pulley 2 5, the rotation speed of the impeller 6 will increase, thereby increasing the pressure of the gas, so that the pressure of the blown gas becomes larger to achieve the required strength. A mesh 29 is provided at one end of the air inlet pipe 27 to prevent external factors from damaging the impeller 6 when the impeller 6 is working, thereby protecting the impeller 6 and increasing the service life of the impeller 6. At the same time, a filter 20 is provided in the air inlet chamber 11 to filter dust and impurities in the air when the gas is inhaled. When the filter 20 needs to be replaced or cleaned, the staff member turns the handle 26, and the handle 26 drives the threaded screw 25 to rotate on the fixed plate 1 24 by pulling the spring 18. The threaded screw 25 drives the fixed plate 28 to slide on the bottom plate 1 through the threaded connection. At the same time, the fixed plate 28 drives the air inlet pipe 27 to slide on the fixed plate 1 24. After the air inlet pipe 27 leaves the air inlet chamber 11 for a certain distance, the staff member pulls the handle 2 30, and the handle 2 30 drives the cylinder 14 to rotate on the box body 13, and the cylinder 14 drives the gear 15 to rotate, the gear 15 drives the rack 16 to move, and the rack 16 drives the slide bar 17 to move on the box body 13. The handle 19 is then pulled to drive the fixing plate 12 to slide out of the air inlet chamber 11. After the fixing plate 12 slides out of the air inlet chamber 11, the handle 2 30 causes the sliding bar 17 to slide out and reset in the box body 13 through the rebound of the spring 18. The filter 20 is separated from the fixing plate 21 and the bolt 22 by simultaneously twisting the bolt 22 and the nut 23 in the opposite direction. Then the staff completes the replacement or cleaning of the filter 20. This arrangement facilitates the replacement of the filter 20, thereby ensuring the filtration of dust in the air. After the replacement or cleaning is completed, the reverse operation can be performed to reset the filter 20.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A centrifugal fan for air blasting and pressurization, comprising a bottom plate (1), characterized in that: The bottom plate (1) is fixedly connected to a motor (2), the output end of the motor (2) is fixedly connected to a pulley 1 (3), the pulley 1 (3) is provided with a belt 1 (4), the belt 1 (4) is provided with a pulley 2 (5), the pulley 2 (5) is fixedly connected to a rotating shaft (10), the rotating shaft (10) is rotatably connected to a volute (7), the volute (7) is fixedly connected to the bottom plate (1), one end of the rotating shaft (10) is fixedly connected to an impeller (6), one side of the volute (7) is fixedly connected to an air outlet chamber (8), the air outlet chamber (8) is fixedly connected to an air outlet (9), and the volute (7) is fixedly connected to an air inlet chamber (11).

2. A centrifugal fan for blasting and pressurizing according to claim 1, characterized in that: A fixing plate (12) is slidably connected in the air inlet chamber (11), a box (13) is fixedly connected to the fixing plate (12), a cylinder (14) is rotatably connected to the box (13), one end of the cylinder (14) is fixedly connected to a handle (30), one end of the cylinder (14) is fixedly connected to a gear (15), a rack (16) is meshingly connected to the gear (15), a slide bar (17) is fixedly connected to the rack (16), and the slide bar (17) slides The invention is connected to a box body (13), a spring (18) is fixedly connected to the box body (13), one end of the spring (18) is fixedly connected to a handle 2 (30), a filter screen (20) is provided on the fixing plate 1 (12), a fixing plate 2 (21) is provided on the filter screen (20), a bolt (22) is slidably connected to the fixing plate 1 (12), a nut (23) is threadedly connected to the bolt (22), and a handle 1 (19) is fixedly connected to the fixing plate 1 (12).

3. A centrifugal fan for blasting and pressurizing according to claim 2, characterized in that: A fixing plate 1 (24) is fixedly connected to the bottom plate (1), a threaded screw (25) is rotatably connected to the fixing plate 1 (24), one end of the threaded screw (25) is fixedly connected to a handle (26), an air inlet pipe (27) is slidably connected to the fixing plate 1 (24), a fixing plate 2 (28) is fixedly connected to the air inlet pipe (27), the fixing plate 2 (28) is slidably connected to the bottom plate (1), the fixing plate 2 (28) is threadedly connected to the threaded screw (25), one end of the air inlet pipe (27) is attached to the air inlet cavity (11), and a mesh sheet (29) is fixedly connected to the air inlet pipe (27).

4. A centrifugal fan for blasting and pressurizing according to claim 3, characterized in that: The bolt (22) passes through the first fixing plate (12), the bolt (22) passes through the filter screen (20), and the bolt (22) passes through the second fixing plate (21).

5. A centrifugal fan for blasting and pressurizing according to claim 4, characterized in that: The impeller (6) is arranged in the volute (7), and the mesh (29) is arranged in the air inlet pipe (27).

6. A centrifugal fan for blasting and pressurizing according to claim 5, characterized in that: The bolts (22) are provided in three groups, and the nuts (23) are provided in three groups.

7. A centrifugal fan for blasting and pressurizing according to claim 6, characterized in that: The filter screen (20) is arranged between the first fixing plate (12) and the second fixing plate (21), and the filter screen (20) is arranged in the air inlet cavity (11).

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