A pressure relief device for a rejection airflow in a rejection machine and a rejection machine based on the device.

Abstract

This utility model discloses a decanting airflow pressure relief device for a debris removal machine. The device is located below the debris discharge chamber, between the chamber and the airlock, and has a vertical channel on one side for direct connection between the chamber and the airlock. The device includes a pressure relief housing, a mesh cylinder, a negative pressure fan, and a reducer. The negative pressure fan draws airflow through the mesh openings on the outer surface of the rotating mesh cylinder, while debris and tobacco leaves cannot pass through the mesh and are discharged through the airlock below. This utility model uses an air inlet at the top of the debris discharge chamber and a rotating mesh cylinder to discharge the decanting airflow to the negative pressure fan. The rotating mesh cylinder with brush rollers prevents the mesh openings from being blocked by debris or tobacco leaves, eliminating the need for manual cleaning of the mesh plate.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment, and in particular to a pressure relief device for a purging airflow in a purging machine. Background Technology

[0002] Most existing tobacco cleaning equipment uses compressed air to remove impurities. This compressed air generates a large volume of airflow during removal. However, current equipment lacks a pressure relief device for this airflow. When the equipment lacks an exhaust port and the cleaning is dense, the airflow has nowhere to escape, creating swirling air in the waste discharge chamber and easily carrying impurities back into the tobacco sheets. Using a fixed perforated plate to discharge the airflow also results in the easy adhesion of impurities or tobacco leaves, and the clogged mesh loses its pressure relief effect. Therefore, this invention employs a rotating mesh cylinder and brush roller structure to discharge the airflow to a negative pressure fan. The brush roller cleans the rotating mesh cylinder, preventing the mesh from being clogged by impurities or tobacco leaves. Simultaneously, by placing an air inlet at the top of the waste discharge chamber near the tobacco sheet conveying channel, the airflow entering through this inlet counteracts the airflow, preventing impurities from being carried back into the tobacco sheet conveying channel. This method avoids the problems of mesh clogging and the need for frequent maintenance and cleaning, while also preventing the airflow from carrying debris back to the smoke sheet conveying channel, thus ensuring the debris removal effect and long-term operational stability of the equipment. Summary of the Invention

[0003] The problem this invention aims to solve is that compressed air generates a large amount of removal airflow when removing impurities. Currently, tobacco impurity removal equipment does not have a pressure relief device for the removal airflow. When the equipment does not have a removal airflow discharge hole and the removal is relatively dense, the airflow has nowhere to be released and forms a swirling motion in the impurity discharge chamber, which easily carries the impurities back into the tobacco sheet.

[0004] To solve the above problems, the present invention adopts the following solution: a decontamination airflow pressure relief device for a debris removal machine, wherein the decontamination airflow pressure relief device is located below the debris discharge chamber and between the debris discharge chamber and the airlock, characterized in that the decontamination airflow pressure relief device includes a pressure relief device housing, a rotating mesh cylinder, a negative pressure fan, and a reducer; the upper and lower ends of the pressure relief device housing are respectively connected to the debris discharge chamber and the airlock, the rotating mesh cylinder is disposed inside the pressure relief device housing, both ends of the rotating mesh cylinder are sealed by the pressure relief device housing, and one end of the pressure relief device housing is provided with a vent for connecting to the negative pressure fan, and the other end of the pressure relief device housing is provided with a mounting hole for the rotating shaft of the rotating mesh cylinder to pass through and connect to the reducer, and a channel is left between the rotating mesh cylinder and the pressure relief device housing to maintain communication between the debris discharge chamber and the airlock.

[0005] Furthermore, the rejection airflow pressure relief device for the impurity removal machine is characterized in that the rejection airflow pressure relief device further includes a brush roller, which is disposed below the rotating screen cylinder and in contact with the rotating screen cylinder. The brush roller is connected to the rotating shaft of the rotating screen cylinder through a chain drive assembly, and the rotating screen cylinder and the brush roller are driven to rotate by a reducer.

[0006] Furthermore, the airflow pressure relief device for the impurity removal machine is characterized in that the channel between the rotating mesh cylinder and the housing of the pressure relief device is a vertical channel that runs vertically through the machine.

[0007] Furthermore, the airflow depressurization device for the impurity removal machine is characterized in that a fresh air inlet is provided on the top of the impurity discharge chamber near the side of the smoke sheet air conveying duct.

[0008] Furthermore, the airflow pressure relief device for the impurity removal machine is characterized in that the outer surface of the rotating mesh cylinder is made of a perforated plate.

[0009] A dust removal machine based on a dust removal airflow pressure relief device for a dust removal machine is characterized in that it consists of a visual dust removal system, a dust discharge chamber, a dust removal airflow pressure relief device, and an airlock. The visual dust removal system is located on one side of the tobacco sheet conveying duct, and the dust discharge chamber is located on the other side and is matched with the visual dust removal system. The dust removal airflow pressure relief device and the airlock are sequentially located at the bottom of the dust discharge chamber.

[0010] The technical effects of this utility model are as follows: In the field of tobacco impurity removal, this utility model avoids the removal airflow from carrying the removed impurities back to the tobacco sheet conveying channel by setting an air inlet at the top of the impurity discharge chamber and adding a rotating mesh cylinder and a negative pressure fan below the impurity discharge chamber.

[0011] This invention employs a rotating screen cylinder and brush roller structure. The rejecting airflow is discharged to a negative pressure fan, while the brush roller cleans the rotating screen cylinder, preventing the mesh from being clogged by debris or tobacco leaves. Simultaneously, an air inlet is located at the top of the debris discharge chamber near the tobacco sheet conveying channel, allowing the airflow entering through this inlet to create convection with the rejecting airflow, preventing debris from being carried back into the tobacco sheet conveying channel. This method avoids the problems of mesh clogging and the need for frequent maintenance and cleaning, while also preventing the rejecting airflow from carrying debris back into the tobacco sheet conveying channel, ensuring the debris removal effect and long-term operational stability of the equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 A schematic diagram of the structure of the airflow relief device.

[0014] Figure 3 A schematic diagram showing the airflow direction before adding a pressure relief device.

[0015] Figure 4 A schematic diagram showing the airflow direction after adding a pressure relief device.

[0016] Figure 5 This is a schematic diagram of a rotating mesh cylinder structure.

[0017] In the diagram: 1 is the smoke sheet air conveying duct, 2 is the visual rejection system, 3 is the smoke sheet, 4 is the debris, 5 is the debris discharge bin, 6 is the pressure relief device housing, 7 is the rotating screen cylinder, 8 is the brush roller, 9 is the airlock, and 10 is the negative pressure fan. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. Example

[0019] like Figure 2 As shown, a depressurization airflow device for a debris removal machine is provided. The depressurization airflow device is located below the debris discharge chamber 5 and between the debris discharge chamber 5 and the airlock 9. The depressurization airflow device includes a depressurization device housing 6, a rotating mesh cylinder 7, a negative pressure fan 10, and a reducer. The upper and lower ends of the depressurization device housing 6 are respectively connected to the debris discharge chamber 5 and the airlock 9. The rotating mesh cylinder 7 is located inside the depressurization device housing 6. Both ends of the rotating mesh cylinder 7 are sealed by the depressurization device housing 6. One end of the depressurization device housing 6 is provided with a vent that connects to the negative pressure fan 10, and the other end of the depressurization device housing 6 is provided with a mounting hole for the rotating shaft of the rotating mesh cylinder 7 to pass through and connect to the reducer. A channel is left between the rotating mesh cylinder 7 and the depressurization device housing 6 to keep the debris discharge chamber 5 and the airlock 9 connected.

[0020] The airflow depressurization device also includes a brush roller 8, which is positioned below the rotating screen cylinder 7 and in contact with it. The brush roller 8 is connected to the rotating shaft of the rotating screen cylinder 7 via a chain drive assembly, and a reducer drives the rotating screen cylinder 7 and the brush roller 8 to rotate. The channel between the rotating screen cylinder 7 and the depressurization device housing 6 is a vertical channel running vertically through the structure. A fresh air inlet is located at the top of the debris discharge chamber 5, near the side of the smoke sheet air delivery duct 1. Figure 5 As shown, the outer surface of the rotating mesh cylinder is made of perforated plate. Example

[0021] like Figure 1As shown, a dust removal machine based on a rejection airflow pressure relief device for a dust removal machine comprises a visual rejection system 2, a dust discharge chamber 5, a rejection airflow pressure relief device, and an airlock 9. The visual rejection system 2 is located on one side of the tobacco sheet conveying channel 1. An opening is located on one side of the tobacco sheet conveying pipe 1 corresponding to the visual rejection system 2, and the opening corresponds to the nozzle of the visual rejection system 2. The dust discharge chamber 5 is located on the other side of the tobacco sheet conveying channel 1, and an air inlet is located at the upper part of the dust discharge chamber 5 near the tobacco sheet conveying channel 1. The lower part of the dust discharge chamber 5 is connected to the pressure relief device housing 6. A rotating screen 7 and a brush roller 8 are installed inside the pressure relief device housing 6. One side of the rotating screen 7 is connected to the air inlet of a negative pressure fan 10, and the lower part of the pressure relief device housing 6 is connected to the airlock 9.

[0022] The smoke sheet containing impurities moves upward along the smoke sheet conveying pipe 1 under the air transport. When the impurities 4 pass through the blowing device 2, they are removed by the compressed air of the blowing device 2 and enter the impurity discharge chamber 5. Under the combined action of the removal airflow and the fresh airflow at the air inlet above the impurity discharge chamber 5, the impurities 4 fly into the rotating mesh cylinder 7 inside the pressure relief device housing 6. The removal airflow and the fresh airflow enter the negative pressure fan 10 through the mesh on the rotating mesh cylinder 7. Under the action of the brush roller 8, the impurities 4 fall into the air lock 9 below and are discharged from the equipment through the air lock 9.

[0023] like Figure 3 As shown, when the equipment is not equipped with a pressure relief device, the rejecting airflow blown out by the jetting device 2 has nowhere to escape, forming a circulation in the debris discharge chamber 5, which easily carries debris back into the smoke sheet conveying channel 1; for example Figure 4 As shown, when an air inlet is provided at the upper part of the debris discharge chamber 5 near the smoke sheet air conveying channel 1, and a pressure relief device housing 6, a rotating screen cylinder 7, and a brush roller 8 are added, the rejection airflow blown out by the blowing device 2 and the airflow from the air inlet above the debris discharge chamber 5 form an opposing force to prevent debris from flowing back into the smoke sheet air conveying channel 1. After the two airflows merge, they pass downward through the rotating screen cylinder 7 and enter the negative pressure fan 10 to discharge the rejection airflow.

Claims

1. A pressure relief device for a rejecting airflow in a debris removal machine, wherein the pressure relief device is disposed below the debris discharge chamber (5) and between the debris discharge chamber (5) and the airlock (9), characterized in that, The pressure relief device for removing airflow includes a pressure relief device housing (6), a rotating mesh cylinder (7), a negative pressure fan (10), and a speed reducer. The upper and lower ends of the pressure relief device housing (6) are respectively connected to the debris discharge chamber (5) and the air lock (9). The rotating mesh cylinder (7) is set inside the pressure relief device housing (6). Both ends of the rotating mesh cylinder (7) are sealed by the pressure relief device housing (6). One end of the pressure relief device housing (6) is provided with a vent that is connected to the negative pressure fan (10). The other end of the pressure relief device housing (6) is provided with an installation hole for the rotating shaft of the rotating mesh cylinder (7) to pass through and connect to the speed reducer. A channel is left between the rotating mesh cylinder (7) and the pressure relief device housing (6) to keep the debris discharge chamber (5) and the air lock (9) connected.

2. The ejecting air flow pressure releasing device for the impurity removing machine according to claim 1, wherein, The airflow depressurization device further includes a brush roller (8), which is located below the rotating mesh cylinder (7) and is in contact with the rotating mesh cylinder (7). The brush roller (8) is connected to the rotating shaft of the rotating mesh cylinder (7) through a chain drive assembly, and the rotating mesh cylinder (7) and the brush roller (8) are driven to rotate by a speed reducer.

3. The ejecting air flow pressure releasing device for the impurity removing machine according to claim 1, wherein, The channel between the rotating mesh cylinder (7) and the pressure relief device housing (6) is a vertical channel that runs vertically through the top and bottom.

4. The ejecting air flow pressure releasing device for the impurity removing machine according to claim 1, wherein, A fresh air inlet is provided on the top of the debris discharge chamber (5) near the side of the smoke sheet air delivery duct (1).

5. The ejecting air flow pressure releasing device for the impurity removing machine according to claim 1, wherein, The outer surface of the rotating mesh cylinder is made of perforated plate.

6. A separator based on the separator's reject air flow pressure relief device of claim 1, characterized in that, It consists of a visual rejection system (2), a debris discharge chamber (5), a rejection airflow pressure relief device and an airlock (9). The visual rejection system (2) is set on one side of the smoke sheet air delivery pipe (1), and the debris discharge chamber (5) is set on the other side and matched with the visual rejection system (2). The rejection airflow pressure relief device and the airlock (9) are set at the bottom of the debris discharge chamber (5) in sequence.

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