Fly ash fineness screening device

Abstract

The utility model relates to the technical field of coal ash recovery, and discloses a coal ash fineness screening device which comprises a screening cylinder, a fan is fixedly connected to one side of the screening cylinder, a feeding pipe is arranged on one side of the upper end of the screening cylinder, a stepping motor is fixedly connected to one side of the upper end of the screening cylinder, and the output end of the stepping motor is fixedly connected with a first gear; the side, away from the stepping motor, of the first gear is fixedly connected with a rotating rod, the side, away from the first gear, of the rotating rod is fixedly connected with a second gear, the lower end of the first gear and the lower end of the second gear are both engaged with a gear ring, and the inner side of the gear ring is fixedly connected with a screen. The coal ash is more uniformly distributed on the screen, blockage after accumulation is prevented, the utilization rate of the screen is improved, the screening throughput and efficiency are improved, and the dynamic movement of the screen is beneficial to vibrating falling particles and preventing the particles from being accumulated on screen holes, so that blockage is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of fly ash recovery, and in particular to a fly ash fineness screening device. Background Art

[0002] Fly ash is the fine ash collected from the flue gas after coal combustion. Fly ash is the main solid waste discharged from coal-fired power plants. Fly ash can be recycled, such as as an admixture for concrete. When fly ash is reused, it needs to be screened, among which fineness screening is an important process step, which is mainly used to determine the size and distribution of fly ash particles to ensure its application effect and quality in concrete. Fineness screening is mainly divided into vibration screening and airflow screening.

[0003] At present, when airflow screens fly ash, the airflow drives the fly ash to flow, and the fly ash is screened by filter meshes of different apertures and then collected. However, the airflow screening structure currently used has a fixed screen, so that some powder particles only contact the screen in a specific area of ​​the screen, making it difficult to fully utilize the entire screen surface, resulting in low screening efficiency. Therefore, a fly ash fineness screening device is designed to solve the above-mentioned problems. Utility Model Content

[0004] In order to solve the problem, the present application provides a fly ash fineness screening device.

[0005] The fly ash fineness screening device provided in this application adopts the following technical solution:

[0006] A fly ash fineness screening device comprises a screening drum, one side of which is fixedly connected to a fan, a feeding pipe is provided on one side of the upper end of the screening drum, one side of the upper end of the screening drum is fixedly connected to a stepper motor, an output end of the stepper motor is fixedly connected to a first gear, a side of the first gear away from the stepper motor is fixedly connected to a rotating rod, a side of the rotating rod away from the first gear is fixedly connected to a second gear, the lower ends of the first gear and the second gear are both meshed with gear rings, and the inner side of the gear ring is fixedly connected to a screen.

[0007] Preferably, the aperture of the screen on the side close to the second gear is larger than the aperture of the screen on the side close to the first gear.

[0008] Preferably, one side of the gear ring is fixedly connected to a limiting ring, and the inner and outer side walls of the limiting ring are movably connected to rolling balls at equal distances.

[0009] Preferably, one side of the feed pipe is fixedly connected to a servo motor, and an output end of the servo motor is fixedly connected to a mounting rod.

[0010] Preferably, one side of the mounting rod is rotatably connected to the inner wall of the feed pipe, and a push plate is fixedly connected to the mounting rod.

[0011] Preferably, the rotating rod is rotatably connected to a support ring, and the support ring is fixedly connected to the inner wall of the screening cylinder.

[0012] Preferably, the screening cylinder is fixedly connected to an inspection door on the side away from the fan, and a door handle is installed at one end of the inspection door.

[0013] Preferably, both sides of the lower end of the screening cylinder are provided with feeding openings, and the lower ends of the feeding openings are clamped with receiving frames.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] In the utility model, the upper and lower positions of the screen are interchanged by using a gear ring to drive the screen to rotate slowly, so that the fly ash is distributed more evenly on the screen, and blockage after accumulation is prevented, thereby improving the utilization rate of the screen, thereby increasing the throughput and efficiency of screening, and the dynamic movement of the screen helps to vibrate the falling particles, preventing the accumulation of particles on the screen holes, especially the passability of fine particles is improved, thereby reducing the occurrence of blockage; BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the front cross-sectional structure of the main body of the application embodiment;

[0017] Figure 2 is a schematic diagram of the meshing structure of the gear and the gear ring of the embodiment of the application;

[0018] Figure 3 It is a schematic diagram of the structure of the gear ring and the limit ring of the embodiment of the application.

[0019] Explanation of the reference numerals in the accompanying drawings: 1. Screening drum; 2. Fan; 3. Stepper motor; 4. Gear No. 1; 5. Rotating rod; 51. Support ring; 6. Gear No. 2; 7. Gear ring; 8. Screen; 9. Limiting ring; 91. Rolling ball; 10. Feed pipe; 11. Servo motor; 12. Mounting rod; 13. Push plate; 14. Feeding port; 15. Collection frame; 16. Inspection door. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-3 This application is described in further detail.

[0021] The present application embodiment discloses a fly ash fineness screening device. Figure 1-3 A fly ash fineness screening device comprises a screening drum 1, a side of the screening drum 1 away from the fan 2 is fixedly connected to an inspection door 16, one end of the inspection door 16 is provided with a door handle, which is used to facilitate the removal of the screen 8 in the screening drum 1 from one side when inspecting or replacing the screen 8;

[0022] One side of the screening drum 1 is fixedly connected to the fan 2, one side of the upper end of the screening drum 1 is provided with a feed pipe 10, one side of the upper end of the screening drum 1 is fixedly connected to the stepper motor 3, the output end of the stepper motor 3 is fixedly connected to the No. 1 gear 4, the side of the No. 1 gear 4 away from the stepper motor 3 is fixedly connected to the rotating rod 5, the side of the rotating rod 5 away from the No. 1 gear 4 is fixedly connected to the No. 2 gear 6, the lower ends of the No. 1 gear 4 and the No. 2 gear 6 are both meshed with a gear ring 7, and the inner side of the gear ring 7 is fixedly connected to the screen 8. The stepper motor 3 drives the No. 1 gear 4 to rotate, the No. 1 gear 4 drives the rotating rod 5 to rotate, the rotating rod 5 drives the No. 2 gear 6, the No. 2 gear 6 and the No. 1 gear 4 drive the gear ring 7 meshed at the lower end of the same side to rotate, the gear ring 7 drives the screen 8 to rotate, and the continuous rotation of the screen 8 makes the fly ash more evenly distributed on the screen to prevent clogging, thereby increasing the screening throughput and efficiency;

[0023] By adopting the above technical solution, the aperture of the screen 8 near the second gear 6 is larger than the aperture of the screen 8 near the first gear 4, so as to screen out fly ash of different particle sizes.

[0024] By adopting the above technical solution, one side of the gear ring 7 is fixedly connected to the limit ring 9, and the inner and outer walls of the limit ring 9 are equidistantly connected to the rolling balls 91. The limit ring 9 and the rolling balls 91 are used to rotate in the prefabricated groove opened in the screening drum 1, so that the gear ring 7 on one side rotates stably enough. The prefabricated groove can refer to Figure 1 The position of the middle gear ring 7 can be seen.

[0025] By adopting the above technical solution, both sides of the lower end of the screening drum 1 are provided with discharge ports 14, and the lower end of the discharge ports 14 is clamped with a receiving frame 15 for collecting the screened fly ash, so that the fly ash can be collected separately.

[0026] By adopting the above technical solution, one side of the feed pipe 10 is fixedly connected to the servo motor 11, the output end of the servo motor 11 is fixedly connected to the mounting rod 12, one side of the mounting rod 12 is rotatably connected to the inner wall of the feed pipe 10, and the mounting rod 12 is fixedly connected to the push plate 13. The servo motor 11 drives the mounting rod 12 to rotate, and the mounting rod 12 drives the push plate 13 to separate the continuously fed fly ash and feed it intermittently to prevent the fly ash from entering too much at one time and causing blockage after piling.

[0027] By adopting the above technical solution, the support ring 51 is rotatably connected to the rotating rod 5, and the support ring 51 is fixedly connected to the inner wall of the screening drum 1. The support ring 51 is used to support the rotating rod 5 so that the rotating rod 5 can rotate stably.

[0028] The implementation principle of a fly ash fineness screening device in the embodiment of the present application is as follows: the fly ash that needs to be screened and dried is fed from the feed pipe 10, and the fan 2 and the servo motor 11 are started, so that the servo motor 11 drives the mounting rod 12 to rotate, and the mounting rod 12 drives the push plate 13 to separate the continuously fed fly ash, and feed it intermittently to prevent the fly ash from entering too much at one time and causing blockage after piling. The fly ash entering the screening cylinder 1 is pushed by the airflow of the fan 2, so that the particles of different particle sizes in the fly ash are separated due to their inertia and aerodynamic characteristics. The larger particles have greater inertia and are not easy to change direction with the airflow, so they will be separated, while the smaller particles can move a longer distance with the airflow, thereby achieving fine The stepper motor 3 can be started at the same time to drive the stepper motor 3 to rotate the No. 1 gear 4, the No. 1 gear 4 drives the rotating rod 5 to rotate, the rotating rod 5 drives the No. 2 gear 6, the No. 2 gear 6 and the No. 1 gear 4 drive the gear ring 7 meshed at the lower end of the same side to rotate, the gear ring 7 drives the screen 8 to rotate, the continuous rotation of the screen 8 makes the fly ash more evenly distributed on the screen, improves the utilization rate of the screen, thereby increasing the screening throughput and efficiency, the dynamic movement of the screen 8 helps to vibrate the falling fly ash and prevent the accumulation of fly ash particles on the screen holes, especially the passability of fine particles is improved, thereby reducing the occurrence of blockage; the fly ash of different sizes screened out enters the collecting frame 15 from the discharge port 14 for collection.

[0029] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0030] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fly ash fineness screening device, comprising a screening drum (1), characterized in that: One side of the screening drum (1) is fixedly connected to the fan (2); one side of the upper end of the screening drum (1) is provided with a feed pipe (10); one side of the upper end of the screening drum (1) is fixedly connected to a stepper motor (3); the output end of the stepper motor (3) is fixedly connected to a first gear (4); the side of the first gear (4) away from the stepper motor (3) is fixedly connected to a rotating rod (5); the side of the rotating rod (5) away from the first gear (4) is fixedly connected to a second gear (6); the lower ends of the first gear (4) and the second gear (6) are both meshed with a gear ring (7); the inner side of the gear ring (7) is fixedly connected to a screen (8).

2. A fly ash fineness screening device according to claim 1, characterized in that: The aperture of the screen (8) on the side close to the second gear (6) is larger than the aperture of the screen (8) on the side close to the first gear (4).

3. A fly ash fineness screening device according to claim 1, characterized in that: One side of the gear ring (7) is fixedly connected to a limiting ring (9), and rolling balls (91) are movably connected to the inner and outer side walls of the limiting ring (9) at equal distances.

4. A fly ash fineness screening device according to claim 1, characterized in that: One side of the feed pipe (10) is fixedly connected to a servo motor (11), and the output end of the servo motor (11) is fixedly connected to a mounting rod (12).

5. A fly ash fineness screening device according to claim 4, characterized in that: One side of the mounting rod (12) is rotatably connected to the inner wall of the feed pipe (10), and a push plate (13) is fixedly connected to the mounting rod (12).

6. The fly ash fineness screening device according to claim 1, characterized in that: The rotating rod (5) is rotatably connected to a support ring (51), and the support ring (51) is fixedly connected to the inner wall of the screening cylinder (1).

7. The fly ash fineness screening device according to claim 1, characterized in that: The side of the screening drum (1) away from the fan (2) is fixedly connected to an inspection door (16), and a door handle is installed at one end of the inspection door (16).

8. The fly ash fineness screening device according to claim 1, characterized in that: The screening cylinder (1) has discharge openings (14) on both sides of the lower end thereof, and a receiving frame (15) is clamped at the lower end of the discharge opening (14).

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