Air heater screen dust blowing device

Abstract

This utility model relates to a dust-blowing device for an air heater screen, belonging to the technical field of tobacco manufacturing equipment. Its structure is as follows: an I-beam guide rail is provided at the upper end of the outer face of the air heater; a U-shaped slide is provided at the upper end of the ventilation screen; two guide wheels are connected to each side of the slide via bearings; the four guide wheels are in rolling engagement with the bottom flanges of the corresponding I-beam guide rails; large gears are integrally or coaxially fitted on the two guide wheels on the same side; a motor is provided on the slide on the same side of the large gears; the output shaft of the motor is connected to a small gear; the small gear meshes with the large gears on both sides for transmission; a reverse-blowing device is provided on the side of the air heater, connected to an external high-pressure air source. This dust-blowing device periodically slides out to perform reverse-blowing dust cleaning, thereby achieving periodic cleaning of the ventilation screen and ensuring the quality of tobacco products.

Description

Technical Field

[0001] This utility model relates to an air heater screen dust blowing device, belonging to the technical field of tobacco manufacturing equipment. Background Technology

[0002] In automated tobacco production lines, there is a forced-air drying process. Natural air is introduced and heated by a blower and then fed into the tobacco production line for further drying. However, during the introduction of natural air, external dust and small foreign objects can accumulate on the ventilation screens. Prolonged processing has the following disadvantages: 1. It can cause deformation of the ventilation holes, affecting gas flow; 2. After dust accumulation, some of it can be drawn into the dryer, contaminating the tobacco and affecting its quality; 3. If the screen is not cleaned in time, scale buildup on the screen can affect the process gas flow, easily causing fluctuations in production quality parameters, and in severe cases, leading to issues such as batch rejection. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an air heater screen dust blowing device. This dust cleaning device slides out periodically to perform reverse blowing to clean the dust, thereby achieving regular cleaning of the ventilation screen and ensuring the quality of tobacco products.

[0004] To solve the above problems, the specific technical solution of this utility model is as follows: A dust blowing device for an air heater screen, wherein an I-beam guide rail is provided at the upper end of the outer end face of the air heater, and a U-shaped slide is provided at the upper end of the ventilation screen. Two guide wheels are connected to both sides of the slide by bearings, and the four guide wheels are respectively in rolling engagement with the bottom flange of the corresponding I-beam guide rail; a large gear is integrally or coaxially engaged on the two guide wheels on the same side, and a motor is provided on the slide on the same side of the large gear. The output shaft of the motor is connected to a small gear, and the two sides of the small gear mesh with the large gears on both sides for transmission; a reverse blowing device is provided at the side end of the air heater, and the reverse blowing device is connected to an external high-pressure air source.

[0005] The reverse spraying device is an air gun. A drag chain is installed on the I-beam guide rail, and a high-pressure air pipe is installed inside the drag chain. The end of the high-pressure air pipe is connected to the air gun. When the air gun is not working, it is hooked to the positioning seat on the side wall of the ventilation net.

[0006] The reverse jetting device consists of several high-pressure nozzles arranged longitudinally on the side wall of the air heater in the direction of the ventilation net's movement. The high-pressure nozzles are connected to an external air source through pneumatic pipelines and valves.

[0007] Limit switches are installed on both sides of the I-beam guide rail, and the limit switches are located at the extreme positions of the ventilation net's left and right movement.

[0008] The ventilation net is equipped with a protective cover on its outer side. One end and the bottom of the protective cover are connected to the outer wall of the air heater at the rear end of the ventilation net through a connecting beam.

[0009] The area of ​​the protective cover is greater than or equal to the area of ​​the ventilation net; the protective cover includes a positioning frame and a protective railing, the cross-section of which is a horizontal V-shape, with the V-shaped opening facing the ventilation net.

[0010] The bottom surface of the protective cover is fixedly connected to the connecting positioning plate; a limiting wheel is provided at the bottom of the ventilation net, and the limiting wheel is supported on the upper surface of the connecting positioning plate.

[0011] The air heater screen dust blowing device of this utility model adopts the above structure and has the following advantages:

[0012] 1. The electrically controlled pull-out structure of the ventilation screen not only saves manpower and resources, but also has a good transmission effect;

[0013] 2. The ventilation screen extends and moves, and during the movement, the nozzles of the reverse jet blowing device blow in the opposite direction to solve the problem of dust accumulation;

[0014] 3. The transmission is achieved by connecting I-beams with guide wheels, which ensures that the ventilation screen is limited in front and rear during transmission, preventing derailment.

[0015] 4. Limiting wheels are provided at the lower end of the ventilation net to support the ventilation net from top to bottom and reduce the load on the guide wheels. Attached Figure Description

[0016] Figure 1 This is a perspective view of Embodiment 1 of this application (rear view with the view open).

[0017] Figure 2 This is the front view (closed state) of Embodiment 1 of this application.

[0018] Figure 3 for Figure 2 Enlarged AA sectional view.

[0019] Figure 4 for Figure 2 A magnified view of the area in direction B.

[0020] Figure 5 This is a perspective view of Embodiment 2 of this application (rear view with the view open). Detailed Implementation Example 1

[0021] like Figures 1 to 4As shown, an air heater screen dust blowing device has an I-beam guide rail 1 on the upper end of the outer end face of the air heater, and a U-shaped slide 3 on the upper end of the ventilation screen 2. Two guide wheels 4 are connected to both sides of the slide 3 by bearings. The four guide wheels 4 are respectively in rolling engagement with the bottom flange of the corresponding I-beam guide rail 1. Large gears 5 are integrally or coaxially engaged on the two guide wheels 4 on the same side. A motor 6 is installed on the slide 3 on the same side of the large gears 5. The output shaft of the motor 6 is connected to a small gear 7. The two sides of the small gear 7 mesh with the large gears 5 on both sides for transmission. When the motor rotates forward, the small gear 7 drives the large gears 5 on both sides to rotate forward. At the same time, the coaxially arranged guide wheels 4 can roll on the I-beam guide rail 1. The guide wheels 4 on the opposite side also roll on the I-beam guide rail 1, so that the slide 3 drives the ventilation screen 2 to move forward out of the air heater and reach the dust blowing state. When the motor rotates in reverse, the slide 3 drives the ventilation screen 2 back to the working state.

[0022] A reverse jet cleaning device is provided on the side of the air heater, and the reverse jet cleaning device is connected to an external high-pressure air source. In this embodiment, the reverse jet cleaning device is an air gun 9. A drag chain 8 is provided on the I-beam guide rail 1. A high-pressure air pipe is provided inside the drag chain 8. The end of the high-pressure air pipe is connected to the air gun 9. When the air gun 9 is not working, it is hooked to the positioning seat on the side wall of the ventilation net 2. When the ventilation net 2 is moved out, the air gun 9 is manually taken out and turned on, so that the ventilation net 2 can be manually cleaned.

[0023] Limit switches 10 are provided on both sides of the I-beam guide rail 1. The limit switches 10 are located at the extreme positions of the ventilation net 2 when it moves left and right.

[0024] The ventilation net 2 is provided with a protective cover 11 on its outer side. One end and the bottom of the protective cover 11 are connected to the outer wall of the air heater at the rear end of the ventilation net 2 through a connecting beam. The area of ​​the protective cover 11 is greater than or equal to the area of ​​the ventilation net 2. The protective cover 11 includes a positioning frame 11-1 and a protective railing 11-2. The cross-section of the protective railing 11-2 is a transverse V-shape, with the V-shaped opening facing the ventilation net 2, which serves as a guide for air intake and also as a safety protection function.

[0025] The bottom surface of the protective cover 11 is fixedly connected to the connecting positioning plate 14; a limiting wheel 15 is provided at the bottom of the ventilation net 2, and the limiting wheel 15 is supported on the upper surface of the connecting positioning plate 14. The connecting positioning plate 14 not only improves the connection strength of the protective cover 11, but also reduces the load on the guide wheel by supporting the limiting wheel 15 on the upper surface of the connecting positioning plate 14. Example 2

[0026] like Figure 5As shown, the reverse blowing device in this embodiment consists of several high-pressure nozzles 12, which are arranged longitudinally on the side wall of the air heater in the direction of the ventilation net 2's movement. The high-pressure nozzles 12 are connected to an external air source via pneumatic pipes 13 and valves. When the ventilation net 2 moves out, the high-pressure nozzles 12 are activated, and during the movement of the ventilation net 2, the high-pressure nozzles 12 can reverse-blow the area traversed by the ventilation net 2. The remaining structure is the same as in Embodiment 1.

Claims

1. A dust blowing device for an air heater screen, characterized in that: An I-beam guide rail (1) is provided on the upper end of the outer end face of the air heater. A U-shaped slide (3) is provided on the upper end of the ventilation net (2). Two guide wheels (4) are connected to the two sides of the slide (3) by bearings. The four guide wheels (4) are respectively rollingly engaged with the bottom flange of the corresponding I-beam guide rail (1). A large gear (5) is integrally or coaxially engaged on the two guide wheels (4) on the same side. A motor (6) is provided on the slide (3) on the same side of the large gear (5). The output shaft of the motor (6) is connected to a small gear (7). The two sides of the small gear (7) mesh with the large gears (5) on both sides for transmission. A reverse jetting device is provided on the side end of the air heater. The reverse jetting device is connected to an external high-pressure air source.

2. The air heater screen dust blowing device according to claim 1, characterized in that: The reverse spraying device is an air gun (9). A drag chain (8) is provided on the I-beam guide rail (1). A high-pressure air pipe is provided inside the drag chain (8). The end of the high-pressure air pipe is connected to the air gun (9). When the air gun (9) is not working, it is attached to the positioning seat on the side wall of the ventilation net (2).

3. The air heater screen dust blowing device according to claim 1, characterized in that: The reverse spraying device consists of several high-pressure nozzles (12), which are arranged longitudinally on the side wall of the air heater in the direction of the ventilation net (2) moving out. The high-pressure nozzles (12) are connected to an external air source through pneumatic pipelines (13) and valves.

4. The air heater screen dust blowing device according to claim 1, characterized in that: Limit switches (10) are provided on both sides of the I-beam guide rail (1), and the limit switches (10) are located at the extreme positions of the ventilation net (2) when it moves left and right.

5. The air heater screen dust blowing device according to claim 1, characterized in that: The ventilation net (2) is provided with a protective cover (11) on the outside. One side end and the bottom of the protective cover (11) are connected to the outer wall of the air heater at the rear end of the ventilation net (2) through a connecting beam.

6. The air heater screen dust blowing device according to claim 5, characterized in that: The area of ​​the protective cover (11) is greater than or equal to the area of ​​the ventilation net (2); the protective cover (11) includes a positioning frame (11-1) and a protective railing (11-2), the cross section of the protective railing (11-2) is a transverse V-shape, and the V-shaped opening faces the ventilation net (2).

7. The air heater screen dust blowing device according to claim 6, characterized in that: The bottom surface of the protective cover (11) is fixedly connected to the connecting positioning plate (14); a limiting wheel (15) is provided at the bottom of the ventilation net (2), and the limiting wheel (15) is supported on the upper surface of the connecting positioning plate (14).

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