Energy-saving centrifugal fan device for steel mill

Abstract

The invention relates to the technical field of energy-saving fans, and discloses an energy-saving centrifugal fan device for a steel mill, which comprises a rotating shaft, an impeller is fixedly connected to the middle of the rotating shaft, a first blade is fixedly connected to the outside of the impeller, and a second blade is fixedly connected to the outside of the first blade. And a protective frame is fixedly connected to the corner of the second blade. According to the energy-saving centrifugal fan device for the steel mill, the current collector is arranged on the side face of the impeller, the arc-shaped face is arranged on the inner side of the current collector, the resistance of an inlet pipeline is reduced, namely, the air circulation efficiency is improved, the energy consumption during rotation of the rotating shaft is reduced, and the spiral pipe is installed outside the rotating shaft and exerts rotating force on gas passing through the interior of the current collector; namely, when air is conveyed into the impeller, the rotation of the air can be rapidly kept the same as that of the impeller, interference of resistance generated by air conveying on rotation of the first blade and the second blade is reduced, the utilization rate of resources is increased, and then the energy-saving effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of energy-saving fans, and in particular to an energy-saving centrifugal fan device used in a steel plant. Background Art

[0002] The main function of a steel mill is to produce steel, including pig iron, steel, steel products, industrial pure iron and ferroalloys. During manufacturing, high temperatures will be generated inside the steel. In order to allow it to form quickly, the internal temperature of the steel needs to be lowered. Therefore, fans are installed inside the steel mill to effectively drive the gas to circulate, thereby improving the gas flowability inside the steel mill. In order to improve the gas flowability, centrifugal fans are used to drive the gas for transmission. Specifically, a centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas, and it is a driven fluid machine.

[0003] A common steel plant ventilation device uses a centrifugal fan device, which uses a motor to drive the impeller at a high speed, and the impeller drives the gas to be squeezed and discharged. A ventilation duct is installed on the outside of the air inlet of the centrifugal fan device, and the ventilation duct is used to guide the flow direction of the gas. However, when the gas passes through the duct, the duct blocks the passing gas, which affects the impeller's absorption efficiency of the air, and then increases the energy loss when the centrifugal fan device is used. For this reason, we propose an energy-saving centrifugal fan device for steel plants. Summary of the invention

[0004] In view of the shortcomings of existing energy-saving centrifugal fan devices used in steel mills, the present invention provides an energy-saving centrifugal fan device for steel mills, which has a collector arranged on the outside of the impeller, and the inner side of the collector is arc-shaped, that is, the collector reduces the resistance of the passing gas and improves the air transmission efficiency, thereby solving the problems raised in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: an energy-saving centrifugal fan device for a steel plant, comprising a rotating shaft, an impeller fixedly connected to the middle of the rotating shaft, a first blade fixedly connected to the outside of the impeller, a second blade fixedly connected to the outside of the first blade, a protective frame fixedly connected to the corners of the second blade, a collector sleeved on the outside of the impeller, a casing sleeved on the outside of the other side of the collector, a fan casing sleeved on the outside of the collector, a mounting plate fixedly connected to the outside of the fan casing, a movable sleeve fixedly connected to the inside of the mounting plate, a threaded sleeve movably sleeved on the inside of the movable sleeve, a group of screws installed on both sides of the inside of the threaded sleeve, and an air outlet duct fixedly connected to the lower part of the fan casing.

[0006] Preferably, a drain hole is opened on one side of the upper portion of the casing, a filter screen is installed inside the casing, the drain hole is located on one side of the filter screen, and the filter screen is arranged in an inclined state inside the casing.

[0007] Preferably, the middle portion of the current collector is in a concave state, and the interior of the current collector is arc-shaped, and the current collector is arranged between the casing and the fan housing.

[0008] Preferably, the first blades are installed on both sides of the impeller, and the second blades are installed outside the impeller.

[0009] Preferably, the exterior of the protection frame is fitted inside the fan housing, and an arc-shaped groove is provided in the middle of the fan housing.

[0010] Preferably, the outside of the rotating shaft is fixedly connected with a spiral tube, and the spiral tube is installed on both sides of the inside of the rotating shaft.

[0011] Preferably, a connecting plate is fixedly connected to the middle of one end of the housing, a bearing is installed inside the connecting plate, and the bearing is installed outside the rotating shaft.

[0012] Preferably, the ends of the screw rods are fixedly connected between the two sets of casings, and the two sets of screw rods are provided with reverse thread grooves.

[0013] Preferably, a set of casings are sleeved on the outside of both ends of the rotating shaft, and one end of the rotating shaft is installed on the output shaft of the motor.

[0014] Compared with the existing energy-saving centrifugal fan device used in steel mills, the present invention has the following beneficial effects:

[0015] 1. The energy-saving centrifugal fan device for steel mills is arranged on the side of the impeller through a collector. The arc surface opened on the inner side of the collector reduces the resistance of the inlet pipe, that is, improves the air circulation efficiency and reduces the energy consumption when the shaft rotates. A spiral tube is installed on the outside of the shaft. The spiral tube applies a rotational force to the gas passing through the inside of the collector, that is, when the air is transmitted to the inside of the impeller, it can quickly keep the same rotation as the impeller, reducing the resistance generated by the conveying gas to interfere with the rotation of the first blade and the second blade, thereby improving the utilization rate of resources and achieving energy-saving effect.

[0016] 2. The energy-saving centrifugal fan device used in the steel plant is installed on both sides of the impeller through the first blade. When the first blade rotates, the first blade drives the air to be absorbed inward, and the second blade drives the absorbed air to be thrown out to the outside, that is, the two groups of first blades can drive the air to be transmitted, and when the air is absorbed at both ends, interference with each other is avoided, thereby improving the utilization rate of air absorption.

[0017] 3. The energy-saving centrifugal fan device used in the steel plant has a collector arranged between the casing and the fan casing. The threaded sleeve is rotated, and the threaded sleeve and the screw rod move in a threaded manner with each other, that is, the threaded sleeve synchronously drives the screw rod to move outward, that is, the casing and the fan casing are stretched outward, that is, the casing and the fan casing apply a pulling force to the collector, thereby ensuring that the collector is more stable when positioned. At the same time, the threaded sleeve and the screw rod are arranged between the two sets of casings, thereby improving the stability of the two sets of casings when positioned. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the main body of the present invention;

[0020] Figure 3 It is a side view structural schematic diagram of the present invention;

[0021] Figure 4 It is a partial enlarged structural schematic diagram of the fan of the present invention;

[0022] Figure 5 It is a schematic diagram of the enlarged structure of the fan impeller of the present invention;

[0023] Figure 6 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0024] In the figure: 1. rotating shaft; 2. impeller; 3. first blade; 4. second blade; 5. protective frame; 6. collector; 7. casing; 8. connecting plate; 9. bearing; 10. drain hole; 11. filter screen; 12. spiral tube; 13. fan casing; 14. mounting plate; 15. movable sleeve; 16. threaded sleeve; 17. screw; 18. outlet pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6, an energy-saving centrifugal fan device for a steel plant, comprising a rotating shaft 1, an impeller 2 is fixedly connected to the middle of the rotating shaft 1, the impeller 2 separates two groups of first blades 3 to prevent the gases transported at both ends from interfering with each other, the outside of the impeller 2 is fixedly connected to the first blade 3, the outside of the first blade 3 is fixedly connected to the second blade 4, when the first blade 3 and the second blade 4 rotate, the first blade 3 and the second blade 4 drive the gas to be absorbed from the middle and discharged to the outside, a protective frame 5 is fixedly connected to the corner of the second blade 4, the protective frame 5 is convenient for fitting with the fan casing 13, the outside of the impeller 2 is sleeved with a collector 6, the collector 6 is arranged on the side of the second blade 4, and the arc surface formed on the inner side of the collector 6 is conducive to the transmission of air It can flow, the outer part of the other side of the collector 6 is sleeved with the casing 7, the outer part of the collector 6 is sleeved with the fan casing 13, the outer part of the fan casing 13 is fixedly connected with a mounting plate 14, the inner part of the mounting plate 14 is fixedly connected with a movable sleeve 15, the inner part of the movable sleeve 15 is movably sleeved with a threaded sleeve 16, and a group of screws 17 are installed on both sides of the inner part of the threaded sleeve 16. When the threaded sleeve 16 is rotated, the threaded sleeve 16 drives the screws 17 to move synchronously to the outside, that is, the distance between the casing 7 and the fan casing 13 is adjusted to the outside, and at the same time, the casing 7 and the fan casing 13 stretch the collector 6 to ensure that the collector 6 maintains stability when clamped between the casing 7 and the fan casing 13, and the lower part of the fan casing 13 is fixedly connected with an outlet duct 18.

[0027] See also Figure 2 A drain hole 10 is provided on one side of the upper part of the casing 7, and a filter screen 11 is installed inside the casing 7. The drain hole 10 is located on one side of the filter screen 11. At the same time, the filter screen 11 is arranged in an inclined state inside the casing 7. The filter screen 11 is arranged inside the casing 7, and the casing 7 drives the gas to be transported. At the same time, when the gas passes through the filter screen 11, the filter screen 11 blocks the solid impurities in the passing gas, reduces the dust contained in the gas from being transported to the inside of the fan, causing the dust to contact the high-speed rotating fan blades, causing the fan blades to be damaged by contact. At the same time, after the filter screen 11 filters the impurities, the filter screen 11 is inclined, that is, the dust can be discharged to the outside through the drain hole 10, that is, efficiency is improved when the impurities are discharged.

[0028] See also Figure 2 The middle part of the collector 6 is concave, and the inside of the collector 6 is arc-shaped. The collector 6 is arranged between the casing 7 and the fan casing 13. The middle part of the collector 6 is concave, and the inside of the collector 6 is arc-shaped. That is, when the collector 6 drives the gas to be transported inward, the collector 6 can concentrate on driving the gas for drainage, reduce the inlet pipeline resistance, and then improve the on-site operation efficiency.

[0029] See also Figure 5The first blades 3 are installed on both sides of the impeller 2, and the second blades 4 are installed on the outside of the impeller 2. The first blades 3 are installed on both sides of the impeller 2, and the impeller 2 separates the two groups of first blades 3. When the first blades 3 rotate, the first blades 3 drive the gas to be absorbed from the inner side of the middle part of the rotating shaft 1, and then the equipment can collect the gas on both sides of the impeller, thereby improving the gas drainage efficiency of the equipment, and then improving the utilization rate of resources, thereby achieving energy-saving effect.

[0030] See also Figure 5 The outside of the protective frame 5 is fitted and installed inside the fan casing 13. An arc-shaped groove is opened in the middle of the fan casing 13. The outside of the protective frame 5 is fitted and installed on the inner side of the fan casing 13, that is, the fan casing 13 limits the position of the second blade 4. At the same time, the inside of the fan casing 13 is arc-shaped. The arc-shaped surface is conducive to the transmission and circulation of air, thereby improving the gas circulation efficiency.

[0031] Among them, the outside of the rotating shaft 1 is fixedly connected with a spiral tube 12, and the spiral tube 12 is installed on both sides of the rotating shaft 1. By installing the spiral tube 12 at both ends of the rotating shaft 1, the spiral tube 12 is in a spiral state, that is, during the rotation of the rotating shaft 1, the rotating shaft 1 drives the spiral tube 12 to rotate, and the spiral tube 12 drains the passing gas and applies a rotational force to the transported gas, which is convenient for controlling the gas when passing through the impeller, and can reduce the force exerted by the impeller, thereby improving the gas absorption efficiency and reducing energy loss.

[0032] See also Figure 2 A connecting plate 8 is fixedly connected to the middle of one end of the casing 7, a bearing 9 is installed inside the connecting plate 8, and the bearing 9 is installed on the outside of the rotating shaft 1. The connecting plate 8 is fixedly connected to the side of the casing 7, and the connecting plate 8 drives the bearing 9 to be installed on the outside of the rotating shaft 1. The bearing 9 drives the rotating shaft 1 to be set in the middle of the casing 7, and the bearing 9 reduces the friction resistance of the rotating shaft 1 when it rotates, reduces energy loss, and ensures the stability of the rotating shaft 1 when it rotates.

[0033] See also Figure 6 The ends of the screw rod 17 are fixedly connected between the two sets of casings 7. At the same time, the two sets of screw rods 17 are provided with reverse thread grooves. By installing the screw rod 17 between the two sets of rotating shafts 1 and rotating the threaded sleeve 16 at the same time, the threaded sleeve 16 drives the screw rod 17 to move outward, that is, the distance between the screw rod 17 and the fan casing 13 is stretched outward, and after applying a pulling force to the collector 6, the collector 6 can be limited between the casing 7 and the fan casing 13, avoiding the problem of offset of the installation position of the collector 6.

[0034] See also Figure 1A set of casings 7 are sleeved on the outside of both ends of the rotating shaft 1, and one end of the rotating shaft 1 is installed on the output shaft of the motor. The motor installed on one side of the rotating shaft 1 is started, and the motor drives the impeller 2 to rotate. The impeller 2 drives the first blade 3 and the second blade 4 to rotate, which can drive the air pressure to circulate. At the same time, the gas is drained and absorbed by the collector 6, and is compressed inside the fan casing 13, and is discharged through the outlet pipe 18.

[0035] Working principle: When in use, start the motor installed on the outside of the rotating shaft 1, the motor drives the impeller 2 to rotate, and after the impeller 2 drives the first blade 3 and the second blade 4 to rotate, the gas can be driven to be transported to the inside of the fan casing 13, and a collector 6 is installed on the side of the impeller 2. The collector 6 reduces the resistance of the inlet pipeline, that is, improves the gas transportation efficiency. At the same time, a filter screen 11 is installed inside the casing 7, and the filter screen 11 blocks the dust in the passing air. A spiral tube 12 is installed on the outside of the rotating shaft 1. The spiral tube 12 is spiral. When the gas passes through the collector 6, the spiral tube 12 moves in a spiral motion, that is, a spiral force is applied to the passing gas to ensure that when the gas contacts the impeller 2, the impeller 2 can quickly drive the passing gas to move synchronously, which can improve the gas circulation efficiency and reduce the energy consumption when the rotating shaft 1 rotates, thereby improving the energy saving of the equipment.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving centrifugal fan device for a steel plant, comprising a rotating shaft (1), a central portion of the rotating shaft (1) being fixedly connected to an impeller (2), and a first blade (3) being fixedly connected to the outer portion of the impeller (2), characterized in that: The outside of the first blade (3) is fixedly connected to the second blade (4), and the corners of the second blade (4) are fixedly connected to a protective frame (5). The outside of the impeller (2) is sleeved with a collector (6), and the outside of the other side of the collector (6) is sleeved with a housing (7). The outside of the collector (6) is sleeved with a fan casing (13), and the outside of the fan casing (13) is fixedly connected to a mounting plate (14), and the inside of the mounting plate (14) is fixedly connected to a movable sleeve (15), and the inside of the movable sleeve (15) is movably sleeved with a threaded sleeve (16), and a group of screws (17) are installed on both sides of the inside of the threaded sleeve (16). The lower part of the fan casing (13) is fixedly connected to an outlet pipe (18).

2. The energy-saving centrifugal fan device for a steel plant according to claim 1, characterized in that: A drainage hole (10) is provided on one side of the upper part of the casing (7), a filter screen (11) is installed inside the casing (7), the drainage hole (10) is located on one side of the filter screen (11), and the filter screen (11) is arranged in an inclined state inside the casing (7).

3. The energy-saving centrifugal fan device for a steel plant according to claim 1, characterized in that: The middle part of the current collector (6) is in a concave state, and the interior of the current collector (6) is in an arc shape. The current collector (6) is arranged between the casing (7) and the fan housing (13).

4. The energy-saving centrifugal fan device for a steel plant according to claim 1, characterized in that: The first blades (3) are installed on both sides of the impeller (2), while the second blades (4) are installed outside the impeller (2).

5. The energy-saving centrifugal fan device for a steel plant according to claim 1, characterized in that: The exterior of the protection frame (5) is fitted into the interior of the fan housing (13), and an arc-shaped groove is provided in the middle of the fan housing (13).

6. The energy-saving centrifugal fan device for a steel plant according to claim 1, characterized in that: The outside of the rotating shaft (1) is fixedly connected with a spiral tube (12), and the spiral tube (12) is installed on both sides of the inside of the rotating shaft (1).

7. The energy-saving centrifugal fan device for a steel plant according to claim 1, characterized in that: A connecting plate (8) is fixedly connected to the middle of one end of the housing (7), a bearing (9) is installed inside the connecting plate (8), and the bearing (9) is installed outside the rotating shaft (1).

8. The energy-saving centrifugal fan device for a steel plant according to claim 1, characterized in that: The ends of the screw rods (17) are fixedly connected between the two sets of casings (7), and the two sets of screw rods (17) are provided with reverse thread grooves.

9. The energy-saving centrifugal fan device for a steel plant according to claim 1, characterized in that: A set of housings (7) are sleeved on the outside of both ends of the rotating shaft (1), and one end of the rotating shaft (1) is mounted on the output shaft of the motor.

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