Dry material crushing double-roller machine capable of reducing flying dust

Abstract

The utility model relates to a dry material crushing double-roller machine capable of reducing raised dust, which solves the problems that the air quality of a working environment is influenced and the health of workers is possibly harmed because a large amount of raised dust is generated in the working process of the existing dry material crushing double-roller machine. The device comprises a machine shell, rollers are arranged in the machine shell, a feeding opening is formed in the upper portion of the extrusion face of the rollers, a discharging opening is formed in the lower portion of the extrusion face of the rollers, an annular air suction device is arranged at the top of the machine shell and surrounds the feeding opening, air suction openings are upwards formed in the circumference of the upper surface of the annular air suction device, and one side of the annular air suction device is connected with an air suction pipeline. The air suction pipeline is attached to the outer wall of the machine shell, extends to the ground and is attached to the ground to be connected to the bag-type dust collector. According to the utility model, the air suction port is arranged around the periphery of the feeding port and is not higher than the feeding port, so that the feeding is not blocked and interfered, and the air suction pipeline is arranged downwards close to the shell and then is connected to the dust remover through the fan, so that the whole working area is not excessively blocked.

Description

Technical Field

[0001] This utility model belongs to the technical field of crushing equipment, and relates to a dry material crusher for the food industry, and particularly to a dry material crushing roller crusher that reduces dust. Background Technology

[0002] Traditional dry material crushing roller mills generate significant dust during operation due to the friction and collision of dry materials. This not only affects air quality in the working environment but also potentially harms worker health. Furthermore, dust increases equipment maintenance costs and reduces production efficiency. Therefore, the market urgently needs a dry material crushing roller mill that can reduce dust generation.

[0003] Currently, some factories typically use top-mounted suction pipes for dust removal, with dust collected through hanging suction vents at the corresponding dust collection points, such as garment factories. However, existing dry material crushers usually have top-feeding and bottom-discharge, with the main dust-generating area being the feeding port. If the dust removal method described above is used, it will obstruct the feeding process. Utility Model Content

[0004] This invention addresses the problem that existing dry material crushing roller mills generate a large amount of dust during operation, which not only affects the air quality of the working environment but may also harm the health of workers. It provides a dry material crushing roller mill that reduces dust generation during the crushing of dry materials, thereby improving the quality of the working environment. Through the design of the exhaust duct, dust is effectively removed while minimizing the impact on material feeding.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a dry material crushing double roller machine for reducing dust, including a machine shell, a double roller is arranged inside the machine shell, a feeding port is arranged above the extrusion surface of the double roller, a discharge port is arranged below the extrusion surface of the double roller, an annular suction device is arranged around the feeding port on the top of the machine shell, and a suction port is arranged around the upper surface of the annular suction device with the circumference facing upward. A suction pipe is connected to one side of the annular suction device, and the suction pipe extends to the ground along the outer wall of the machine shell and connects to a bag filter dust collector along the ground.

[0006] This device employs a downward-facing suction duct layout, with the suction inlets surrounding the feed inlet and positioned no higher than the feed inlet to avoid obstructing or interfering with the feeding process. The suction duct runs along the machine casing downwards and is then connected to a fan without a dust collector, minimizing obstruction of the overall working area. Dust generated during feeding and the dry material crushing roller mill is drawn away by the suction inlets as it overflows from the feed inlet, reducing dust levels in the production environment. Even during shutdown, because the suction inlets face upwards, dust remaining at the suction inlets will not fall due to its own weight, unlike suction ducts that hang downwards from the top.

[0007] Preferably, the air inlet is arc-shaped and evenly distributed circumferentially on the upper surface of the existing air suction device.

[0008] Preferably, the upper surface of the annular suction device is not higher than the top surface of the feeding port.

[0009] Preferably, the rollers include a fixed roller and a movable roller. The fixed roller has a fixed shaft position, while the movable roller's shaft position is laterally adjustable. An adjusting spring is provided on the outside of the movable roller's shaft. The crushing force of the rollers is adjusted by adjusting the spring according to the target size of the dry material being crushed.

[0010] Preferably, a vibrating screen is installed below the discharge port, and the vibrating screen is inclined. A first conveyor belt for conveying small dry particles is installed directly below the vibrating screen, and a second conveyor belt for conveying large dry particles is installed below the bottom of the vibrating screen. The first conveyor belt conveys the small dry particles that have reached the crushing target to the next process, while the second conveyor belt conveys the excessively large dry particles, which are then collected and fed back into the dry material crushing roller mill for secondary crushing.

[0011] Preferably, the conveying directions of the first conveyor belt and the second conveyor belt are perpendicular to each other.

[0012] Preferably, the mesh size of the vibrating screen is 40-100 mesh.

[0013] Preferably, a fan is connected in series on the air intake duct.

[0014] Preferably, a powder recovery frame is provided at the powder outlet of the bag filter.

[0015] Preferably, multiple dry material crushing roller mills are provided, and multiple dry material crushing rollers are connected to the same bag filter dust collector.

[0016] The suction port of this utility model is arranged around the circumference of the feeding port, and the height of the suction port is not higher than that of the feeding port, so it will not obstruct or interfere with the feeding. The suction pipe is arranged downward along the casing and then connected to the dust collector through the fan, so as not to obstruct the entire working area too much. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the annular suction device of this utility model.

[0020] In the diagram: 1. Machine casing, 2. Feed inlet, 3. Fixed roller, 4. Movable roller, 5. Adjusting spring, 6. Dry material, 7. Particles, 8. Vibrating screen, 9. First conveyor belt, 10. Second conveyor belt, 11. Support leg, 12. Suction duct, 13. Annular suction device, 14. Fan, 15. Bag dust collector, 16. Powder recovery frame, 17. Suction port. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0022] Example: A dry material crushing roller mill that reduces dust emissions, such as Figure 1 As shown. This device includes a housing 1, inside which are arranged a pair of rollers, including a fixed roller 3 and a movable roller 4. The position of the rotating shaft of the fixed roller 3 is fixed, while the position of the rotating shaft of the movable roller 4 is laterally adjustable. An adjusting spring 5 is provided on the outside of the rotating shaft of the movable roller. A feeding port 2 is provided above the extrusion surface of the rollers, and a discharge port is provided below the extrusion surface of the rollers. A 60-mesh vibrating screen 8 is provided below the discharge port. The vibrating screen is inclined, and a first conveyor belt 9 for conveying small dry particles is provided directly below the vibrating screen. A second conveyor belt 10 for conveying large dry particles is provided below the bottom of the vibrating screen. The conveying directions of the first conveyor belt 9 and the second conveyor belt 10 are perpendicular to each other.

[0023] A ring-shaped suction device 13 is installed around the feeding port on the top of the casing 1. One side of the ring-shaped suction device 13 is connected to a suction duct 12, which extends along the outer wall of the casing 1 to the ground. A fan 14 is connected in series on the suction duct. The suction duct connects to a bag filter 15 along the ground, and a powder recovery frame 16 is installed at the powder outlet of the bag filter. Multiple dry material crushing roller mills are installed, and multiple dry material crushing rollers are connected to the same bag filter. Figure 2 As shown, the annular suction device 13 has suction ports 17 arranged circumferentially upwards on its upper surface. The suction ports 17 are arc-shaped strips and are evenly distributed circumferentially on the upper surface of the current suction device. The upper surface of the annular suction device 13 is not higher than the top surface of the feeding port 2.

[0024] Dust generated during the feeding process and the dry material crushing roller mill is immediately drawn away by the suction port as it overflows from the feeding port, reducing dust in the entire production environment. Even during shutdown, because the suction port is upward-facing, dust remaining at the suction port of this device will not fall due to its own weight, unlike suction pipes that hang from the top. The suction port and suction pipe of this device do not occupy the space above the machine casing and have no impact on the feeding process.

Claims

1. A dry material crushing roller mill for reducing dust emission, comprising a casing, with rollers disposed inside the casing, a feeding port disposed above the extrusion surface of the rollers, and a discharge port disposed below the extrusion surface of the rollers, characterized in that: The top of the casing is equipped with a ring-shaped suction device around the feeding port. The upper surface of the ring-shaped suction device is provided with suction ports facing upwards. One side of the ring-shaped suction device is connected to a suction pipe. The suction pipe extends to the ground along the outer wall of the casing and connects to the bag filter along the ground.

2. The dry material crushing roller mill for reducing dust emission according to claim 1, characterized in that: The air intake is in the shape of an arc strip, and the air intakes are evenly distributed circumferentially on the upper surface of the existing air intake device.

3. A dry material crushing roller mill for reducing dust emission according to claim 1, characterized in that: The upper surface of the annular suction device is not higher than the top surface of the feeding port.

4. A dry material crushing roller mill for reducing dust emission according to claim 1, characterized in that: The rollers include a fixed roller and a movable roller. The fixed roller has a fixed shaft position, while the movable roller has a horizontally adjustable shaft position. An adjusting spring is provided on the outside of the movable roller's shaft.

5. A dry material crushing roller mill for reducing dust emission according to claim 1, characterized in that: A vibrating screen is installed below the discharge port. The vibrating screen is inclined. A first conveyor belt for conveying small dry particles is installed directly below the vibrating screen. A second conveyor belt for conveying large dry particles is installed below the bottom of the vibrating screen.

6. A dry material crushing roller mill for reducing dust emission according to claim 5, characterized in that: The conveying directions of the first conveyor belt and the second conveyor belt are perpendicular to each other.

7. A dry material crushing roller mill for reducing dust emission according to claim 5, characterized in that: The mesh size of the vibrating screen is 40-100 mesh.

8. A dry material crushing roller mill for reducing dust emission according to claim 1, characterized in that: A fan is connected in series on the air intake duct.

9. A dry material crushing roller mill for reducing dust emission according to claim 1, characterized in that: A powder recovery frame is installed at the powder outlet of the bag filter.

10. A dry material crushing roller mill for reducing dust emission according to claim 1, characterized in that: Multiple dry material crushing roller mills are installed, and multiple dry material crushing rollers are connected to the same bag dust collector.

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