A conveying device and heavy impurity removing equipment

Abstract

The application relates to a conveying device and a heavy impurity removing device, and belongs to the technical field of tobacco sheet impurity removing, which comprises a conveyor, an upper cover arranged on the conveyor, a rotating shaft rotationally connected in the upper cover, the rotating shaft being driven by a motor, scrapers being arranged on the circumferential surface of the rotating shaft, the linear speed of the scrapers under the driving of the rotating shaft being greater than the linear speed of the conveying belt surface of the conveyor, and the scrapers being in contact with the materials on the conveying belt surface of the conveyor during rotation to disturb and scatter the materials. The application has the effects of disturbing and scattering the tobacco sheet materials during conveying, reducing the phenomenon of tobacco sheet bunching during conveying, and improving the stability and accuracy of air selection and impurity removing.

Description

Technical Field

[0001] This application relates to the field of tobacco dust removal technology, and in particular to a conveying device and a heavy dust removal equipment. Background Technology

[0002] In tobacco processing, tobacco flakes, as a major intermediate product, typically undergo multiple conveying and impurity removal processes to ensure the smooth operation of downstream processes and the stability of product quality. Existing conveying methods mainly include two types: conveyor-based spraying and airlock-based conveying.

[0003] In actual production, regardless of the conveying method used, tobacco flakes often clump together during transport due to factors such as moisture content, electrostatic adsorption, and bulk density. During air separation, the presence of clumps in the air separation zone alters the local airflow channel structure, causing air pressure fluctuations, instability, or flow deviation, affecting the normal operation of the impurity removal system. Furthermore, in gravity air separation devices, the system uses airflow to blow light tobacco flakes upwards while heavy impurities fall naturally. If the tobacco flakes clump together, they are very likely to fall along with the heavy impurity channel, leading to mis-rejection. Utility Model Content

[0004] In order to disperse and break up the tobacco flakes during the conveying process, reduce the phenomenon of tobacco flakes clumping during conveying, and improve the stability and accuracy of air separation and impurity removal, this application provides a conveying device and a heavy impurity removal equipment.

[0005] The conveying device provided in this application adopts the following technical solution:

[0006] A conveying device includes a conveyor with an upper cover. A rotating shaft is rotatably connected inside the upper cover. The rotating shaft is driven by a motor. A scraper is arranged along the circumference of the rotating shaft. The linear velocity of the scraper driven by the rotating shaft is greater than the linear velocity of the conveyor belt surface of the conveyor. During rotation, the scraper contacts the material on the surface of the conveyor belt of the conveyor, disturbing and breaking up the material.

[0007] By adopting the above technical solution, the scraper continuously disturbs the tobacco flakes on the conveyor belt surface under the rotational action of a speed higher than that of the conveyor belt. This effectively breaks up the clumps of material caused by factors such as humidity, compaction, and static electricity, significantly improving the looseness of the material and preventing the tobacco flakes from being conveyed in clumps into the subsequent impurity removal process. This helps to improve the stability and accuracy of air separation and impurity removal, allowing heavy impurities to be better separated from the tobacco flakes, thereby improving the impurity removal effect and reducing the false rejection rate.

[0008] Optionally, a plurality of scrapers are provided, and the plurality of scrapers are arranged at equal intervals along the circumference of the rotating shaft, and periodically form the following structural state during the rotation of the rotating shaft:

[0009] At least one of the scrapers is perpendicular to the conveyor belt surface of the conveyor, and its side away from the rotating shaft is disposed near the conveyor belt surface; at least another scraper is disposed near the inner sidewall of the upper cover, its side away from the rotating shaft.

[0010] By adopting the above technical solution, multiple scrapers are arranged at equal intervals along the circumference of the rotating shaft. As the rotating shaft rotates, during the conveying process, a set of scrapers is periodically placed close to the conveyor belt and another set of scrapers is placed close to the inner wall of the upper cover. This creates a closed partition structure similar to an airlock while disturbing and dispersing the material. In this state, most of the air can be prevented from flowing directly into the air classifier along the conveying direction, which is conducive to maintaining the air pressure stability of the impurity removal system.

[0011] Optionally, a dust removal hood is installed on the feed end of the conveyor, and the dust removal hood is connected to a dust removal pipe.

[0012] This application embodiment also provides a heavy debris removal device, including the above-mentioned conveying device, and further including a separation chamber. The bottom of the separation chamber is provided with a heavy debris discharge port, and a heavy debris conveying device is connected to the heavy debris discharge port. The top of the separation chamber is provided with a tobacco discharge port. The separation chamber is provided with an air inlet and a feed inlet along its length direction. The air inlet is located below the feed inlet, and the conveyor is installed at the feed inlet of the separation chamber.

[0013] By adopting the above technical solution, both the air inlet and the feed inlet are arranged along the length of the separation chamber, which can significantly expand the lateral spreading area of ​​the tobacco flakes, thereby increasing the amount of tobacco flakes discharged and the airflow processing capacity per unit time, and enhancing the throughput efficiency of the device.

[0014] Optionally, air inlets are provided on both sides of the separation chamber, and ventilation pipes are connected to the air inlets. A deflector plate is provided at the exhaust port of the ventilation pipe. A guide plate for guiding airflow upward is provided inside the separation chamber. The guide plate is installed at the air inlet and is positioned opposite to the adjacent deflector plate. A material guiding ventilation plate is installed inside the separation chamber. The guide plate is located between the material guiding ventilation plate and the deflector plate. The material guiding ventilation plate is used to guide heavy debris to the heavy debris outlet.

[0015] By adopting the above technical solution, air is supplied simultaneously from both sides of the separation chamber, and the air distribution plate helps to evenly diffuse the airflow along the entire length, creating a stable and symmetrical upward airflow field within the chamber. The air distribution plate and the guide plate are positioned opposite each other, which reduces the horizontal turning of the airflow, lowers turbulence and energy loss, and helps the airflow quickly form a vertical upward flow, thus facilitating the stable upward transport of tobacco.

[0016] The guide ventilation plate is used to guide heavy impurities away from the main airflow path during material conveying and to converge towards the heavy impurity outlet, thereby effectively preventing heavy particles from accumulating in the silo or stagnating in the internal pipes of the system along the conveying airflow, reducing the risk of channel blockage, and improving the impurity removal efficiency and operational continuity of the entire system.

[0017] Optionally, the heavy debris conveying device includes a mounting frame, on which a discharge shell is mounted. A conveying screw is rotatably connected inside the discharge shell. The conveying screw is driven by a motor. A fourth air lock is installed at the discharge end of the discharge shell. A sealing gasket is provided in the separation chamber along the contour direction of the heavy debris discharge port. The inlet end of the discharge shell abuts against the sealing gasket.

[0018] By adopting the above technical solution, the discharge shell provides a certain buffer storage space, avoiding frequent blockage or backflow of heavy and complex outlets under high throughput operation scenarios, thereby improving the processing capacity and operational continuity of the equipment.

[0019] Optionally, the discharge shell is slidably connected to the mounting frame, and a lifting actuator is installed on the mounting frame. The lifting actuator is connected to the discharge shell, and when the lifting actuator is in the lifting state, the feed end of the discharge shell is pressed against the sealing gasket.

[0020] By adopting the above technical solution, when maintenance, debris blockage removal, or internal cleaning of the discharge shell is required, it is only necessary to first control the lifting actuator to make the discharge shell fall away from the sealing contact, and then move it horizontally through the sliding mounting bracket. This can easily achieve quick disassembly of the discharge shell and manual intervention, greatly improving the maintainability and fault response efficiency of the system.

[0021] Optionally, the conveyor has a first inspection port at its bottom, the upper cover has a second inspection port, the separation chamber has a third inspection port, the separation chamber has a first viewing window, and the ventilation pipe has a second viewing window.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. Under the rotational action of the scraper at a speed higher than that of the conveyor belt, the scraper continuously agitates the tobacco flakes on the surface of the conveyor belt, which can effectively break up the clumps of material caused by factors such as humidity, compaction, and static electricity, significantly improve the looseness of the material, and prevent the tobacco flakes from being conveyed in clumps into the subsequent impurity removal process. This helps to improve the stability and accuracy of air classification and impurity removal, and allows heavy impurities to be better separated from tobacco flakes, thereby improving the impurity removal effect and reducing the false rejection rate.

[0024] 2. Multiple scrapers are arranged at equal intervals along the circumference of the rotating shaft. As the shaft rotates, during the conveying process, a set of scrapers is periodically placed close to the conveyor belt and another set of scrapers is placed close to the inner wall of the upper cover. This creates a closed partition structure similar to an airlock while disturbing and dispersing the material. In this state, it can effectively prevent most of the air from flowing directly into the air classifier along the conveying direction, which is conducive to maintaining the stable air pressure of the impurity removal system.

[0025] 3. The conveying device disperses the smoke flakes, and the airflow, aided by the air distribution plate, helps to evenly diffuse the airflow along its entire length, creating a stable and symmetrical upward airflow field within the separation chamber. The air distribution plate and guide plate are positioned opposite each other, reducing horizontal airflow turning, minimizing turbulence and energy loss, and facilitating a rapid upward airflow. Furthermore, the discharge and air inlets along the length of the separation chamber increase the feed rate and airflow, thereby improving the equipment's throughput and impurity removal efficiency.

[0026] 4. Under high throughput conditions, the discharge shell provides a buffer storage space, avoiding frequent blockages or backflow at the heavy and mixed outlets during high-throughput operation, thus improving the equipment's processing capacity and operational continuity. When maintenance, debris removal, or internal cleaning of the discharge shell is required, simply control the lifting actuator to lower the discharge shell out of the sealing contact, and then move it horizontally via the sliding mounting bracket. This allows for easy and quick disassembly of the discharge shell and manual intervention, greatly improving the system's maintainability and fault response efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the structure of the conveying device in an embodiment of this application.

[0028] Figure 2 This is a structural schematic diagram illustrating the first inspection port and the first cover in an embodiment of this application.

[0029] Figure 3 This is a schematic diagram illustrating the structure of a heavy impurity removal device according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram illustrating the structure of the discharge port for heavy debris in an embodiment of this application.

[0031] Figure 5 This is a schematic diagram illustrating the structure of the guide plate, the material guiding ventilation plate, and the air distribution plate in the embodiments of this application.

[0032] Figure 6 This is a schematic diagram illustrating the structure of the heavy debris conveying device in the embodiments of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Conveyor; 11. First inspection port; 12. First cover; 2. Upper cover; 21. Second inspection port; 22. Second cover; 31. Rotating shaft; 32. Scraper; 41. Dust hood; 42. Dust removal pipe; 5. Separation chamber; 51. Heavy waste discharge port; 52. Smoke discharge port; 53. Air inlet; 54. Feed inlet; 55. Third inspection port; 56. Third cover plate; 57. First viewing window; 58. Guide plate; 59. Material guiding ventilation plate; 6. Ventilation pipe; 61. Air distribution plate; 62. Second viewing window; 7. Heavy waste conveying device; 71. Mounting frame; 72. Lifting actuator; 73. Discharge shell; 74. Conveying screw; 75. Fourth air lock; 76. Sealing gasket. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses a conveying device.

[0036] like Figure 1 and Figure 2 The conveying device includes a conveyor 1. A first inspection port 11 is provided at the bottom of the conveyor 1, and a first cover 12 for closing the first inspection port 11 is provided at the bottom of the conveyor 1. The first cover 12 is pressed tightly by a pressure rod. An upper cover 2 is bolted to the top of the discharge end of the conveyor 1. The upper cover 2 includes an upper cover plate and two side plates. The upper cover plate consists of an arc-shaped plate and two straight plates, with the two straight plates connected to the two ends of the arc-shaped plate respectively. The arc-shaped plate and the two straight plates are integrally formed. A second inspection port 21 is provided on the upper cover 2, and a second cover 22 for closing the second inspection port 21 is hinged to the upper cover 2. The second cover 22 is fixed to the upper cover 2 by a locking buckle.

[0037] A rotating shaft 31 is rotatably connected inside the upper cover 2. The rotating shaft 31 is driven by a motor. Four scrapers 32 are equidistantly arranged along the circumference of the rotating shaft 31. The linear velocity of the scrapers 32 driven by the rotating shaft 31 is greater than the linear velocity of the conveyor belt surface of the conveyor 1. During rotation, the scrapers 32 come into contact with the material on the surface of the conveyor belt of the conveyor 1, disturbing and breaking up the material. Furthermore, during the rotation of the rotating shaft 31, the following structural state is periodically formed:

[0038] When one scraper 32 is perpendicular to the conveyor belt surface of the conveyor 1, the side of the scraper 32 away from the shaft 31 is positioned close to the conveyor belt surface of the conveyor 1, with a distance of 0.8 mm between the scraper 32 and the conveyor belt surface of the conveyor 1. Furthermore, the side of another scraper 32 positioned opposite to the scraper 32 is 0.8 mm away from the inner sidewall of the top of the upper cover 2, to prevent a large amount of air from flowing directly into the air separation system along the conveying direction of the conveyor 1. A dust collector hood 41 is installed at the feed end of the conveyor 1, and the dust collector hood 41 is connected to a dust collector pipe 42.

[0039] The implementation principle of the conveying device in this embodiment is as follows: Under the rotational action of the scraper 32, which is higher than the linear speed of the conveyor belt, the scraper 32 continuously disturbs the tobacco material on the surface of the conveyor belt of the conveyor 1, which can effectively break up the clumps of material caused by factors such as humidity, compaction, and static electricity, significantly improve the looseness of the material, and prevent the tobacco clumps from being conveyed into the subsequent impurity removal process. This is conducive to improving the stability and accuracy of air separation and impurity removal, and better separating heavy impurities from tobacco clumps, thereby improving the impurity removal effect and reducing the false rejection rate.

[0040] Furthermore, multiple scrapers 32 are arranged at equal intervals around the circumference of the rotating shaft 31. As the rotating shaft 31 rotates, during the conveying process, a set of scrapers 32 are periodically placed close to the conveyor belt of the conveyor 1, and another set of scrapers 32 are placed close to the inner wall of the upper cover 2. This creates a closed partition structure similar to an airlock while disturbing and dispersing the material. In this state, it can effectively prevent most of the air from flowing directly into the air classifier along the conveying direction, which is conducive to maintaining the stable air pressure of the impurity removal system.

[0041] like Figure 3 , Figure 4 and Figure 5 This application also discloses a heavy debris removal device, including the conveying device described in this application embodiment, and a separation chamber 5. The bottom of the separation chamber 5 has a heavy debris outlet 51 along its length, and a heavy debris conveying device 7 is connected to the heavy debris outlet 51. The top of the separation chamber 5 has a tobacco flake outlet 52. The separation chamber 5 has an air inlet 53 and a feed inlet 54 along its length, with the air inlet 53 located below the feed inlet 54. Air inlets 53 are also provided on both sides of the separation chamber 5. Third inspection ports 55 are provided at both ends of the separation chamber 5. A third sealing plate 56 for closing the third inspection ports 55 is hinged to the separation chamber 5, and the third sealing plate 56 is fixed to the separation chamber 5 with bolts. First viewing windows 57 are provided on both sides of the separation chamber 5.

[0042] Both the conveyor 1 and the upper cover 2 are bolted to the separation chamber 5, and the conveyor 1 and the upper cover 2 are installed at the feed inlet 54. A ventilation pipe 6 is connected to the air inlet 53 of the separation chamber 5. In this embodiment, there are four air inlets 53, that is, two air inlets 53 are opened on each side of the separation chamber 5, and the air inlets 53 on both sides of the separation chamber 5 correspond one-to-one. In this embodiment, the ventilation pipe 6 is a diversion pipe, and the two exhaust ends of the diversion pipe are connected to the two corresponding air inlets 53 respectively.

[0043] A wind deflector 61 is installed at the exhaust port of the ventilation duct 6. A guide plate 58 for guiding airflow upwards is provided inside the separation chamber 5. In this embodiment, there are two sets of guide plates 58: one set is installed at the air inlet 53 on one side of the separation chamber 5, and the other set is installed at the air inlet 53 on the other side of the separation chamber 5. The guide plates 58 are positioned opposite to their adjacent wind deflector 61. A material guiding ventilation plate 59 is installed inside the separation chamber 5. In this embodiment, there are two material guiding ventilation plates 59, positioned opposite to each other and located between the two guide plates 58. The material guiding ventilation plate 59 consists of an inclined plate and two straight plates. One straight plate connects to the smoke discharge channel of the separation chamber 5, and the other straight plate connects to the heavy debris discharge port 51. The inclined plate is perforated and faces the exhaust end of the guide plate 58. A second viewing window 62 is provided at the top of the exhaust end of the ventilation duct 6.

[0044] like Figure 4 and Figure 6 The heavy debris conveying device 7 includes a mounting frame 71, on which a lifting actuator 72 is mounted. In this embodiment, the lifting actuator 72 is a hydraulic cylinder. The lifting actuator 72 is connected to a discharge shell 73, which is slidably connected to the mounting frame 71 via a guide rod, allowing the discharge shell 73 to slide vertically. A conveying screw 74 is rotatably connected inside the discharge shell 73, driven by a motor. A fourth airlock 75 is installed at the discharge end of the discharge shell 73. A sealing gasket 76 is provided in the first separation chamber 5 along the contour direction of the heavy debris discharge port 51. In the working state, the inlet end of the discharge shell 73 abuts against the sealing gasket 76.

[0045] The implementation principle of the heavy impurity removal equipment in this embodiment is as follows: the conveying device of this embodiment disperses the smoke flakes, and the airflow, under the action of the air distribution plate 61, helps to evenly diffuse the airflow along the entire length direction, so that the airflow forms a stable and symmetrical upward airflow field in the separation chamber 5. The air distribution plate 61 is arranged opposite to the guide plate 58, which can reduce the horizontal turning of the airflow, reduce turbulence and energy loss, and help the airflow quickly form a vertical upward flow direction. Furthermore, the discharge port 54 and air inlet 53 opened along the length direction of the separation chamber 5 can increase the feed flow rate and airflow rate, thereby increasing the throughput of the equipment and improving the impurity removal effect.

[0046] Under high throughput conditions, the discharge shell 73 provides a certain buffer storage space, avoiding frequent blockage or backflow of heavy and mixed materials at the outlet under high throughput operation, thus improving the equipment's processing capacity and operational continuity. When maintenance, debris removal, or internal cleaning operations are required on the discharge shell 73, simply control the lifting actuator 72 to lower the discharge shell 73 out of the sealing contact, and then move it horizontally via the sliding mounting bracket 71. This allows for easy and quick disassembly of the discharge shell 73 and manual intervention, greatly improving the system's maintainability and fault response efficiency.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A delivery device characterized by: The system includes a conveyor (1), on which an upper cover (2) is provided. A rotating shaft (31) is rotatably connected inside the upper cover (2). The rotating shaft (31) is driven by a motor. A scraper (32) is provided along the circumference of the rotating shaft (31). The linear speed of the scraper (32) driven by the rotating shaft (31) is greater than the linear speed of the conveyor belt surface of the conveyor (1). During the rotation process, the scraper (32) contacts the material on the surface of the conveyor belt of the conveyor (1) and disturbs and disperses the material.

2. The delivery device of claim 1, wherein: A plurality of scrapers (32) are provided, and the scrapers (32) are arranged at equal intervals along the circumference of the rotating shaft (31). During the rotation of the rotating shaft (31), the following structural state is formed periodically: At least one of the scrapers (32) is perpendicular to the conveyor belt surface of the conveyor (1), and its side away from the shaft (31) is disposed near the conveyor belt surface of the conveyor (1), and at least one other scraper (32) is disposed near the inner wall of the upper cover (2) on the side away from the shaft (31).

3. The delivery device of claim 1, wherein: A dust collector hood (41) is installed on the feed end of the conveyor (1), and the dust collector hood (41) is connected to a dust collector pipe (42).

4. A heavy foreign matter removing apparatus characterized by comprising: The device includes any one of the conveying devices described in claims 1-3, and further includes a separation chamber (5), wherein a heavy debris discharge port (51) is provided at the bottom of the separation chamber (5), a heavy debris conveying device (7) is connected to the heavy debris discharge port (51), a tobacco discharge port (52) is provided at the top of the separation chamber (5), an air inlet (53) and a feed inlet (54) are provided along the length of the separation chamber (5), the air inlet (53) is located below the feed inlet (54), and the conveyor (1) is installed at the feed inlet (54) of the separation chamber (5).

5. The heavy impurity removal equipment according to claim 4, characterized in that: The separation chamber (5) has air inlets (53) on both sides, and the air inlets (53) are connected to ventilation pipes (6). A deflector plate (61) is provided at the exhaust port of the ventilation pipe (6). A guide plate (58) for guiding airflow upward is provided in the separation chamber (5). The guide plate (58) is installed at the air inlet (53) and is opposite to the adjacent deflector plate (61). A material guiding ventilation plate (59) is installed in the separation chamber (5). The guide plate (58) is located between the material guiding ventilation plate (59) and the deflector plate (61). The material guiding ventilation plate (59) is used to guide heavy debris to the heavy debris outlet (51).

6. The heavy impurity removal device according to any one of claims 4 or 5, characterized in that: The heavy debris conveying device (7) includes a mounting frame (71), on which a discharge shell (73) is mounted. A conveying screw (74) is rotatably connected inside the discharge shell (73). The conveying screw (74) is driven by a motor. A fourth airlock (75) is installed at the discharge end of the discharge shell (73). A sealing gasket (76) is provided in the separation chamber (5) along the contour direction of the heavy debris discharge port (51). The inlet end of the discharge shell (73) abuts against the sealing gasket (76).

7. The heavy impurity removal equipment according to claim 6, characterized in that: The discharge shell (73) is slidably connected to the mounting frame (71). A lifting actuator (72) is installed on the mounting frame (71). The lifting actuator (72) is connected to the discharge shell (73). When the lifting actuator (72) is in the lifting state, the feed end of the discharge shell (73) abuts against the sealing gasket (76).

8. The heavy impurity removal equipment according to claim 5, characterized in that: The conveyor (1) has a first inspection port (11) at its bottom, the upper cover (2) has a second inspection port (21), the separation chamber (5) has a third inspection port (55), the separation chamber (5) has a first viewing window (57), and the ventilation pipe (6) has a second viewing window (62).

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