Tobacco leaf grading table with dust removal function

Abstract

The tobacco leaf grading table comprises a grading table, an impurity and dust removal pipeline and an impurity and dust removal device, at least one set of open holes are formed in the table top of the grading table, a drawer is arranged below each set of open holes, an opening is formed in the bottom of each drawer, the opening in the bottom of each drawer is communicated with one end of the impurity and dust removal pipeline, and the other end of the impurity and dust removal pipeline is communicated with the impurity and dust removal device. A lamp holder is erected above the grading table; a lamp tube is arranged at the upper part of the lamp holder; the impurity and dust removal device comprises a cabinet, a centrifugal fan and a cloth bag filter, the cabinet is divided into a first dust removal chamber, a second dust removal chamber and a centrifugal fan chamber, an inlet of the first dust removal chamber is communicated with the other end of the impurity and dust removal pipeline, the first dust removal chamber is communicated with the second dust removal chamber through a communication port, and a centrifugal fan is arranged in the centrifugal fan chamber; an inlet of the centrifugal fan is communicated with the second dust removal chamber, and a cloth bag filter for separating the communication port from the inlet of the centrifugal fan is arranged in the second dust removal chamber.

Description

Technical Field

[0001] This application relates to the technical field of leaf selection and dust removal, and particularly to a tobacco leaf grading table with a dust removal function. Background Art

[0002] When purchasing flue-cured tobacco before threshing and redrying processing, in order to improve the qualified rate and availability rate of tobacco leaf grades, strictly control non-tobacco substances, and lay a foundation for formula threshing and redrying processing, it is usually necessary to go through a selection, that is, tobacco leaf grading. Tobacco leaf grading is to judge and distinguish the quality of tobacco leaves through the color, shape, oil content, etc. of the tobacco leaves. During the grading process, due to the original tobacco materials or other factors, the tobacco leaves delivered by tobacco farmers will contain non-tobacco substances such as plastic films, chicken feathers, and shredded woven bags, and shredded tobacco and dust are also easily generated during the grading process.

[0003] However, the existing tobacco leaf grading tables cannot collect shredded tobacco well and cannot efficiently handle dust, resulting in increased labor intensity of workers and a deteriorated working environment. The non-tobacco substances in the delivered tobacco leaves are relatively small, making it difficult and time-consuming to remove them manually, which seriously affects the efficiency of the second tobacco leaf selection during threshing and redrying in the subsequent industrial production of cigarettes, causing losses to industrial production. Summary of the Invention

[0004] The purpose of this application is to provide a tobacco leaf grading table with a dust removal function to solve the problems in the prior art that the existing tobacco leaf grading tables cannot collect shredded tobacco well and cannot efficiently handle dust, resulting in increased labor intensity of workers and a deteriorated working environment, and that the non-tobacco substances in the delivered tobacco leaves are relatively small, making it difficult and time-consuming to remove them manually, which seriously affects the efficiency of the second tobacco leaf selection during threshing and redrying in the subsequent industrial production of cigarettes, causing losses to industrial production.

[0005] To achieve the above purpose, an embodiment of this application provides a tobacco leaf grading table with a dust removal function, including: a grading table, a dust and impurity removal pipeline, and a dust and impurity removal device. Among them,

[0006] At least one group of openings is provided on the tabletop of the grading table. A drawer is provided below each group of openings. An opening at the bottom of the drawer is provided at the bottom of the drawer, and the opening at the bottom of the drawer is communicated with one end of the dust and impurity removal pipeline. A lamp holder is erected above the grading table, and a lamp tube is arranged on the upper part of the lamp holder;

[0007] The impurity and dust removal device includes: a cabinet, a centrifugal fan, and a bag filter. The cabinet is divided into a first dust removal chamber, a second dust removal chamber, and a centrifugal fan chamber. The inlet of the first dust removal chamber is communicated with the other end of the impurity and dust removal pipeline. The first dust removal chamber and the second dust removal chamber are connected through a communication port. A centrifugal fan is provided in the centrifugal fan chamber, and the inlet of the centrifugal fan is communicated with the second dust removal chamber. A bag filter that separates the communication port from the inlet of the centrifugal fan is provided in the second dust removal chamber.

[0008] Optionally, at least one set of baffles is provided below the openings. A protrusion is provided on the upper part of the baffle. The protrusion extends upward from one opening or the first slot of the tabletop out of the tabletop. At least two first slide rails are provided below the tabletop. The opposite sides of the baffle are respectively coupled with the corresponding first slide rails. A second slot is provided on one side of the drawer, which is on the same horizontal plane as the baffle. When the baffle is pulled open, the baffle passes through from the second slot.

[0009] The lamp holder includes a column and a cross beam. There are two columns. The bottoms of the two columns are respectively detachably connected to one side of the grading table. The tops of the two columns are respectively connected to both ends of the cross beam. The lamp tube is arranged on the cross beam.

[0010] Optionally, a primary filter that separates the inlet of the first dust removal chamber from the communication port is provided in the first dust removal chamber. The primary filter includes a filter frame and a filter medium inside it. The filter medium is made of non-woven fabric material or fiberglass material or metal mesh.

[0011] Optionally, the opening of the first dust removal chamber is opened at the upper end of the first dust removal chamber. At least one air guide duct is provided in the first dust removal chamber. The opening of the air guide duct faces the opening of the first dust removal chamber, and the outlet of the air guide duct faces the communication port.

[0012] Optionally, one side side wall of the air guide duct is the side wall of the first dust removal chamber, and the other side side wall with an opening encloses a space for placing the primary filter.

[0013] Optionally, the bag filter is a cylindrical filter, including a metal frame and a polyester fiber filter cloth. The polyester fiber filter cloth is sleeved outside the metal frame.

[0014] The bag mouth of the bag filter is fixedly connected to a bracket. Screw holes are provided on the outer edge of the bracket. The bag filter is fixed to the side wall of the second dust removal chamber by screws screwed into the screw holes, and the bracket surrounds the communication port.

[0015] Optionally, a gasket is provided between the bracket and the communication port.

[0016] A miscellaneous removal and dust collection box is provided at the lower part of the first dust removal chamber and the second dust removal chamber.

[0017] Optionally, the centrifugal fan is a multi-wing centrifugal fan.

[0018] Optionally, the inlet of the first dust removal chamber is arranged upward, the second dust removal chamber and the centrifugal fan chamber are both located on one side of the first dust removal chamber, and the outlet of the centrifugal fan faces a diversion plate opened on the side wall of the centrifugal fan chamber.

[0019] Optionally, the grading table is made of cold-rolled stainless steel plate. The grading table is provided with foldable table legs. The upper end of the table legs is provided with folding hinges. One end of the folding hinge is rotatably connected to the lower part of the tabletop, and the other end is rotatably connected to the table legs;

[0020] Sliding rail slots are provided on both sides of the drawer and are coupled with a second sliding rail arranged at the lower part of the tabletop;

[0021] A filter screen is provided at the opening at the bottom of the drawer;

[0022] The lamp tube includes 2 cold-color T8 lamp tubes and 1 warm-color T8 lamp tube, and the power of the lamp tube is 20W.

[0023] The embodiments of the present application have the following advantages:

[0024] The embodiments of the present application provide a tobacco leaf grading table with a dust removal function, including: a grading table, a miscellaneous removal and dust removal pipeline, and a miscellaneous removal and dust removal device. Among them, at least one group of openings is provided on the tabletop of the grading table. A drawer is provided below each group of openings. An opening at the bottom of the drawer is provided at the bottom of the drawer. The opening at the bottom of the drawer is communicated with one end of the miscellaneous removal and dust removal pipeline. A lamp holder is erected above the grading table, and a lamp tube is arranged at the upper part of the lamp holder; the miscellaneous removal and dust removal device includes: a cabinet, a centrifugal fan, and a bag filter. The cabinet is divided into a first dust removal chamber, a second dust removal chamber, and a centrifugal fan chamber. The inlet of the first dust removal chamber is communicated with the other end of the miscellaneous removal and dust removal pipeline. The first dust removal chamber and the second dust removal chamber are connected through a communication port. A centrifugal fan is provided in the centrifugal fan chamber. The inlet of the centrifugal fan is communicated with the second dust removal chamber. A bag filter that separates the communication port from the inlet of the centrifugal fan is provided in the second dust removal chamber.

[0025] Compared with the prior art, the tobacco leaf grading table with a dust removal function provided by the above technical solution utilizes the negative pressure generated by the centrifugal fan in the impurity and dust removal device to effectively separate tobacco leaves and some tobacco leaf fragments, suck the tobacco leaf fragments and impurities away from the openings, eliminating the need for manual separation and collection of the fragments and impurities, improving the leaf selection efficiency, and being able to remove the dust on the tobacco leaves and the dust in the air, with high dust removal efficiency, improving the environmental sanitation of the workroom, thus solving the problems in the prior art that the tobacco leaf grading table cannot collect broken tobacco well, cannot efficiently handle dust, resulting in increased labor intensity of workers, a deteriorated working environment, and the non-tobacco substances in the sold tobacco leaves being difficult to remove manually due to their small size, which is time-consuming and laborious, seriously affecting the efficiency of the second tobacco leaf selection during threshing and redrying in subsequent industrial cigarette production and causing losses to industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are merely exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extension based on the provided drawings without creative efforts.

[0027] Figure 1 FIG. is a schematic structural diagram of a tobacco leaf grading table with a dust removal function provided by at least one embodiment of the present application;

[0028] Figure 2 FIG. is a three-dimensional structural diagram of a grading table of a tobacco leaf grading table with a dust removal function provided by at least one embodiment of the present application;

[0029] Figure 3 FIG. is a schematic structural diagram of an impurity and dust removal device of a tobacco leaf grading table with a dust removal function provided by at least one embodiment of the present application;

[0030] Figure 4 FIG. is a schematic installation structure diagram of a bag filter of a tobacco leaf grading table with a dust removal function provided by at least one embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following specific embodiments illustrate the embodiments of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0034] An embodiment of the present application provides a tobacco leaf grading table with a dust removal function. Refer to Figures 1 to 4 , including:

[0035] A grading table 1, a dust and impurity removal pipeline 2, and a dust and impurity removal device 3. Among them,

[0036] At least one set of openings 23 are provided on the tabletop of the grading table 1. A drawer 4 is provided below each set of openings 23. An opening at the bottom of the drawer is provided at the bottom of the drawer 4. The opening at the bottom of the drawer is communicated with one end of the dust and impurity removal pipeline 2. A lamp holder 5 is erected above the grading table 1, and a lamp tube 6 is provided on the upper part of the lamp holder 5;

[0037] The dust and impurity removal device 3 includes: a cabinet, a centrifugal fan 10, and a bag filter 11. The cabinet is divided into a first dust removal chamber 7, a second dust removal chamber 8, and a centrifugal fan chamber 9. The inlet of the first dust removal chamber 7 is communicated with the other end of the dust and impurity removal pipeline 2. The first dust removal chamber 7 and the second dust removal chamber 8 are connected through a communication port. A centrifugal fan 10 is provided in the centrifugal fan chamber 9. The inlet of the centrifugal fan 10 is communicated with the second dust removal chamber 8. A bag filter 11 is provided in the second dust removal chamber 8 to separate the communication port from the inlet of the centrifugal fan 10.

[0038] Specifically, the desktop of the grading table 1 is made of a strong and wear-resistant material, which can ensure the stability of long-term use. At least one set of openings 23 are provided on the desktop, so that impurities and dust generated during the grading process can smoothly fall into the drawer 4 below. An opening is provided at the bottom of each drawer 4, and these openings are closely connected to one end of the impurity and dust removal pipe 2, ensuring that the dust and impurities can smoothly enter the pipe for subsequent dust removal treatment. The impurity and dust removal device 3 includes a cabinet, a centrifugal fan 10 and a bag filter 11. The interior of the cabinet is cleverly divided into a first dust removal chamber 7, a second dust removal chamber 8 and a centrifugal fan chamber 9. The inlet of the first dust removal chamber 7 is connected to the other end of the impurity and dust removal pipe 2, so that dust and impurities can smoothly enter the dust removal chamber. The first dust removal chamber 7 and the second dust removal chamber 8 are connected through a communication port. After the primary filtration in the first dust removal chamber 7, the dust will enter the second dust removal chamber 8 for further treatment. The inlet of the centrifugal fan 10 is connected to the second dust removal chamber 8. By inhaling the air filtered by the bag, a negative pressure environment is formed to promote the continuous entry of dust into the dust removal system.

[0039] In some embodiments, a baffle is further provided below at least one set of the openings 23. A protrusion is provided on the upper part of the baffle, and the protrusion extends upward from one opening or the first slot on the desktop out of the desktop. At least two first slide rails are provided below the desktop. The opposite sides of the baffle are respectively coupled with the corresponding first slide rails. A second slot is provided on one side of the drawer, which is on the same horizontal plane as the baffle. When the baffle is pulled open, the baffle passes through from the second slot.

[0040] Specifically, the baffle should be made of wear-resistant and lightweight materials, such as plastic. The design of the protruding part should take into account the convenience and safety of user operation. Its shape can be conical or cylindrical to facilitate easy identification and grasping by the user. The height of the protrusion should be appropriate, ensuring that it can smoothly extend out of the desktop from the opening or the first slot on the desktop, and avoiding being too high to affect the normal use of the desktop. Interfaces matching the first slide rails can be designed on both sides of the baffle to ensure that the baffle can slide smoothly on the slide rails. The interface part can be made of wear-resistant materials to extend the service life. When the protrusion extends out of the desktop from the opening, the opening should be strip-shaped, and the extending direction of the first slide rail should be consistent with the length direction of the strip-shaped opening. In some embodiments, the first slide rail can be a ball slide rail or a silent slide rail. The first slide rail is installed below the desktop, in the same direction as the sliding direction of the baffle. Since both the baffle and the first slide rail are above the drawer 4 and between the second slide rails, the length of the first slide rail should be determined according to the space of the drawer 4, and it is necessary to ensure that the baffle can completely pass through the second slot. The first slide rail can be firmly installed below the desktop by screws or other fixing parts to prevent loosening or falling off during use.

[0041] In the above embodiments, by providing a baffle, when workers need to clean impurities, broken tobacco, and dust on the tobacco leaves, they can move the baffle by sliding the protrusion to open the opening 23, so that the negative pressure generated by the centrifugal fan 10 sucks away the impurities, broken tobacco, and dust from the opening 23; when workers need to sort and grade the tobacco leaves, they can move the baffle to close the opening 23, preventing the situation where the tobacco leaves are adsorbed by the negative pressure on the opening 23 and cannot be turned over for sorting and grading.

[0042] In some embodiments, the lamp holder 5 includes columns 12 and a cross beam 13. There are two columns 12, and the bottoms of the two columns 12 are respectively detachably connected to one side of the grading table 1. The tops of the two columns 12 are respectively connected to both ends of the cross beam 13, and the lamp tube 6 is arranged on the cross beam 13.

[0043] Specifically, in order to provide a clearer working environment, a lamp holder 5 is erected above the grading table 1. The lamp holder 5 is composed of columns 12 and a cross beam 13. The bottom ends of the columns 12 are connected to one side of the grading table 1 in a detachable manner, facilitating transportation and installation. The cross beam 13 spans above the grading table 1, providing a stable support for the lamp tube 6. In some embodiments, a lampshade is provided above the lamp tube 6, and the parameters of the lampshade are: input voltage 220V / 50HZ, protection level 20, insulation level. In some embodiments, the lamp holder 5 uses a 1.2 mm thick stainless steel 30×30 square tube. The height of the cross bar of the lamp holder 5 from the tabletop is 1.2 m, and it is assembled and fixed on the tabletop in a disassemblable and assembled mode.

[0044] In some embodiments, a primary filter that separates the inlet of the first dust removal chamber 7 from the communication port is provided in the first dust removal chamber. The primary filter includes a filter frame and a filter medium inside it. The filter medium is made of non-woven fabric material, or fiberglass material, or metal mesh.

[0045] Specifically, the primary filter is located inside the first dust removal chamber 7. Its main function is to initially filter larger particulate matters at the beginning when the soot enters the dust removal system, thereby reducing the pressure on subsequent filtering devices and improving the efficiency of the entire dust removal system. The specific structure of the primary filter includes two parts: a filter frame and a filter medium. The filter frame is generally made of a sturdy metal material, such as stainless steel or aluminum alloy, to ensure its stability and durability. The shape and structure of the frame are designed according to actual needs to adapt to the installation space and filtering requirements of the first dust removal chamber 7. The filter medium is the core part of the primary filter and directly participates in the filtering of the soot. In some embodiments, the filter medium includes non-woven fabric, fiberglass, metal mesh, etc. These materials have good filtering effects and high wear resistance, can effectively intercept larger particulate matters, and at the same time allow the air flow to pass through smoothly. The existence of the primary filter can also protect subsequent devices such as the centrifugal fan 10 and the bag filter 11 from being damaged by large particulate matters and extend the service life of the devices.

[0046] In some embodiments, the opening of the first dust removal chamber 7 is provided at the upper end of the first dust removal chamber 7. At least one air guide duct is provided in the first dust removal chamber 7. The opening of the air guide duct faces the opening of the first dust removal chamber 7, and the outlet of the air guide duct faces the communication port.

[0047] In some embodiments, one side wall of the air guide duct is the side wall of the first dust removal chamber 7, and the side wall with an opening on the other side of the air guide duct encloses a space for placing the primary filter.

[0048] In some embodiments, the bag filter 11 is a cylindrical filter, including a metal frame and a polyester fiber filter cloth. The polyester fiber filter cloth is sleeved outside the metal frame;

[0049] The mouth of the bag of the bag filter 11 is fixedly connected to the bracket 14. Threaded holes 15 are provided on the outer edge of the bracket 14. The bag filter 11 is fixed to the side wall of the second dust removal chamber 8 by screws 16 screwed into the threaded holes 15, and the bracket 14 surrounds the communication port.

[0050] In some embodiments, a gasket 17 is provided between the bracket 14 and the communication port;

[0051] The lower parts of the first dust removal chamber 7 and the second dust removal chamber 8 are provided with impurity and dust collection boxes.

[0052] Specifically, the gasket 17 is used to further enhance the sealing effect and prevent smoke and dust from leaking. The impurity and dust collection box is used to collect the impurities blocked by the filter, facilitating the cleaning of the impurity and dust removal device 3.

[0053] In some embodiments, the centrifugal fan 10 is a multi-wing centrifugal fan 10.

[0054] Specifically, first, the multi-wing centrifugal fan 10 sucks the fallen sundries and the air containing dust into the filter and makes it pass through at high speed. At this time, the dust in the air is intercepted by the primary filter and the bag filter 11. The dust intercepted in the filter can be cleaned manually to achieve the effect of impurity and dust removal and purification. The polyester fiber filter cloth contains electrostatic fibers and has advantages such as high dust laying, high dust loading, and high air permeability. In some embodiments, an automatic back-blowing device can also be installed to achieve automatic cleaning of the filter. In some embodiments, the speed of the multi-wing centrifugal fan 10 is adjustable to adjust the suction force.

[0055] In some embodiments, the inlet of the first dust removal chamber 7 is arranged upward. The second dust removal chamber 8 and the centrifugal fan chamber 9 are both located on one side of the first dust removal chamber 7. The outlet of the centrifugal fan 10 faces the diversion plate provided on the side wall of the centrifugal fan chamber 9.

[0056] Specifically, the deflector is used to ensure smooth exhaust and avoid backflow.

[0057] In some embodiments, the grading table 1 is made of cold-rolled stainless steel plate. The grading table 1 is provided with foldable table legs. The upper end of the table legs is provided with folding hinges. One end of the folding hinge is rotatably connected to the lower part of the tabletop, and the other end is rotatably connected to the table legs.

[0058] Both sides of the drawer 4 are provided with slide rail slots, which are coupled with the second slide rails arranged at the lower part of the tabletop.

[0059] A filter screen is provided at the opening at the bottom of the drawer 4.

[0060] The lamp tube 6 includes 2 cold-color T8 lamp tubes 6 and 1 warm-color T8 lamp tube 6, and the power of the lamp tube 6 is 20W.

[0061] Specifically, the desktop size of each grading table 1 is 2.4m × 0.58m. The desktop is made by folding the edge of 1.8mm SUS201 stainless steel plate and laser punching. The size of the opening 23 is 27cm × 2.5cm, and 10cm of the original plate is reserved around. The table legs are welded with 1.5mm thick 50×50 stainless steel square tubes, equipped with foldable table legs. The folding hinge is made of 1.2mm thick stainless steel folding hinge with thickened folding bolts. The distance from the desktop to the ground is 0.755m. The size of the drawer 4 is 0.95m × 0.45m, and the depth is 0.06m. The drawer 4 is made of 1.2mm stainless steel plate by folding and welding, and is equipped with slide rail slots.

[0062] Specifically, by setting a filter screen at the opening at the bottom of the drawer, impurities with larger diameter and self-weight are intercepted in the drawer 4, preventing impurities with larger diameter and self-weight from entering the impurity removal and dust removal pipeline 2, resulting in the accumulation of impurities or blocking of the impurity removal and dust removal pipeline 2 and the impurity removal and dust removal device 3.

[0063] In some embodiments, the folding table legs mainly consist of an upper leg section 18, a lower leg section 19, and a table leg crossbeam 20. The upper end of the upper leg section 18 is fixedly connected to the bottom of the grading table 1 by means of welding or bolt connection, etc.; the lower end of the lower leg section 19 is equipped with anti-slip foot pads to ensure the stability of the grading table during use. A table leg crossbeam 20 is connected between two relatively close lower leg sections 19. The upper leg section 18 and the lower leg section 19 are rotatably connected. Folding hinges are respectively connected to the table leg crossbeam 20 of the lower part of the tabletop and the lower leg section 19 to realize the simultaneous folding and unfolding functions of two relatively close table legs. In some embodiments, the folding hinge includes two folding members 21, and each folding member 21 is respectively composed of two rotatably connected folding parts, and the two folding parts are respectively connected to the table leg crossbeam 20 of the lower part of the tabletop and the lower leg section 19. A folding part crossbeam 22 is also provided between two upper folding parts or between two lower folding parts. A spring is connected between two rotatably connected folding parts to provide assistance for folding. In some embodiments, a buckle device is provided between two rotatably connected folding parts, and the buckle device is a concave and convex structure respectively provided at the rotational connection of the two folding parts. To ensure the stability of the grading table 1 in the unfolded state, when the table legs are unfolded in place, the folding hinge is in the fully unfolded state, and the provided buckle device is buckled, that is, the concave and convex structures are coupled together, which can automatically lock the relative positions of the upper leg section 18 and the lower leg section 19 to prevent them from accidentally folding during use.

[0064] In some embodiments, the slide rail and card slot structure at the lower part of the tabletop mainly consists of a second slide rail and a card slot. The second slide rail is made of wear-resistant and smoothly sliding metal material, and they are fixed to the lower part of the tabletop of the grading table 1; the card slots are arranged on both sides of the drawer 4 and are matched with the second slide rail. The second slide rail is firmly installed on the lower part of the tabletop of the grading table 1 by bolts or other fixing means to ensure that it will not loosen or shift during use. The card slots are closely attached to both sides of the drawer 4 and are fixed to both sides of the drawer 4 by means of buckles or bolts. The design of the second slide rail and the card slot enables the drawer 4 to slide smoothly and steadily. The surface of the second slide rail is specially treated with a low friction coefficient, reducing the resistance of the drawer 4 during sliding.

[0065] In some embodiments, the lamp tube 6 selects a T8 lamp tube 6 with alternating cold light and warm light, which not only has a moderate power (20W per lamp), but also can adjust the lighting effect according to needs to ensure the accuracy and comfort of the grading work.

[0066] Specifically, the requirements for the lamp tube 6 are: color temperature 5500 - 6000K, illuminance: natural scattered light 3000LX - 10000LX, artificial simulated natural light 2000 ± 200LX.

[0067] In some embodiments, the impurity and dust removal pipeline 2 uses a flexible material to adapt to specific working environments or installation requirements. For example: 1. Bellows: A bellows is a pipeline with a corrugated shape. It has good flexibility and stretchability and can adapt to different installation spaces and bending requirements. Bellows are usually made of plastic materials such as polyvinyl chloride (PVC) or polyethylene (PE), and have the characteristics of corrosion resistance and wear resistance, and are suitable for soot transmission. 2. Silicone tube: A silicone tube is a flexible, high-temperature resistant, and corrosion-resistant pipeline material. It has good elasticity and wear resistance and can be bent into various shapes, facilitating installation and layout. Silicone tubes are suitable for dust removal systems that require high temperature resistance or corrosion resistance. 3. Polyurethane hose: Polyurethane hoses have excellent wear resistance, pressure resistance, and oil resistance, and also have good flexibility and bending performance. It can flexibly adapt to complex installation environments and ensure the smooth transmission of soot.

[0068] Specifically, for the flexible impurity and dust removal pipeline 2, the connection methods with the opening at the bottom of the drawer and the inlet of the first dust removal chamber 7 include: 1. Clamp connection: Use a clamp and a sealing ring to tightly connect both ends of the pipeline to the side walls at the opening or inlet, ensuring that soot does not leak from the connection. 2. Zip-type connection: Use a zip-type connector to tighten and fix both ends of the pipeline to form a reliable sealed connection. 3. Quick-insert connection: Adopt a quick plug-and-play joint design to conveniently and quickly complete the connection and disassembly of the pipeline. Since the flexible pipeline material itself does not have sufficient support capacity, support and fixing devices need to be set at the folded position or at the position of the inlet of the first dust removal chamber 7 to prevent the pipeline from being overly bent or deformed during operation. For example, a stainless steel right-angle elbow is set above the inlet of the first dust removal chamber 7 to convert the upward-opening inlet of the first dust removal chamber 7 into a horizontal opening, facilitating the connection of the impurity and dust removal pipeline 2 and preventing bending and collapse.

[0069] In some embodiments, multiple drawers 4 are interconnected through ventilation pipelines, and the ventilation pipelines are connected to the impurity and dust removal pipeline 2, so that one impurity and dust removal pipeline 2 can communicate with the openings at the bottoms of multiple drawers 4.

[0070] In some embodiments, according to the personnel operation distribution of the grading table 1, the impurity and dust removal device 3 can be set at both ends of the grading table 1 and connected to the drawers 4 of the grading table 1 through the impurity and dust removal pipeline 2. The staff sits on the other two sides of the grading table 1 to perform tobacco leaf grading operations.

[0071] In summary, compared with the prior art, the tobacco leaf grading table with a dust removal function provided by the above technical solution utilizes the negative pressure generated by the centrifugal fan 10 in the impurity and dust removal device 3 to effectively separate tobacco leaves and some tobacco leaf fragments, suck the tobacco leaf fragments and impurities away from the opening 23, eliminating the need for manual separation and collection of the fragments and impurities, improving the leaf selection efficiency, removing the dust on the tobacco leaves and the dust in the air, with high dust removal efficiency, and improving the environmental hygiene of the workroom. Thus, it solves the problems in the prior art that the tobacco leaf grading table cannot effectively collect broken tobacco, cannot efficiently handle dust, increasing the labor intensity of workers and deteriorating the working environment, and that it is difficult and time-consuming for manual removal of non-tobacco substances in the sold tobacco leaves due to their small size, seriously affecting the efficiency of the second tobacco leaf selection during threshing and redrying in subsequent industrial cigarette production and causing losses to industrial production.

[0072] Note that unless otherwise directly stated, all features disclosed in this specification (including any appended claims, abstract, and drawings) can be replaced by alternative features that serve the same, equivalent, or similar purposes. Therefore, unless otherwise clearly stated, each disclosed feature is merely an example of a group of equivalent or similar features. When used, "furthermore", "preferably", "even further", and "more preferably" are simply the starting points for elaborating another embodiment based on the foregoing embodiment. The content following the "furthermore", "preferably", "even further", or "more preferably" in combination with the foregoing embodiment constitutes the complete composition of another embodiment. The components formed by any arbitrary combination among several "furthermore", "preferably", "even further", or "more preferably" settings following the same embodiment constitute another embodiment.

[0073] In the implementation of functions and steps, the corresponding functions and steps in each embodiment may also occur in an order different from that shown. For example, two consecutive functions and steps can actually be executed or implemented substantially in parallel, and they can sometimes be executed or implemented in the reverse order, depending on the functions involved.

[0074] Although the present application has been described in detail with general descriptions and specific embodiments above, based on the present application, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present application fall within the scope of protection required by the present application.

Claims

1. A tobacco leaf grading table with dust removal function, characterized in that: include: Grading table, dust removal pipeline, dust removal device, including: At least one group of openings is provided on the tabletop of the grading table, a drawer is provided below each group of openings, an opening is provided at the bottom of the drawer, the opening at the bottom of the drawer is connected to one end of the impurity and dust removal pipeline, a lamp rack is provided above the grading table, and a lamp tube is provided on the upper part of the lamp rack; The impurity removal and dust removal device includes: a cabinet, a centrifugal fan, and a bag filter. The cabinet is divided into a first dust removal chamber, a second dust removal chamber, and a centrifugal fan chamber. The inlet of the first dust removal chamber is connected to the other end of the impurity removal and dust removal pipeline. The first dust removal chamber and the second dust removal chamber are connected through a connecting port. A centrifugal fan is provided in the centrifugal fan chamber. The inlet of the centrifugal fan is connected to the second dust removal chamber. A bag filter is provided in the second dust removal chamber to separate the connecting port from the inlet of the centrifugal fan.

2. The tobacco grading table with dust removal function according to claim 1 is characterized in that: A baffle is further provided below at least one group of the openings, a protrusion is provided on the upper part of the baffle, and the protrusion extends upward from an opening or a first slot on the desktop, and at least two first slide rails are provided at the lower part of the desktop, and the opposite sides of the baffle are respectively coupled with the corresponding first slide rails, and a second slot is provided on one side of the drawer, which is located on the same horizontal plane as the baffle, and when the baffle is pulled open, the baffle passes through the second slot; The lamp rack comprises a column and a crossbeam. There are two columns. The bottom ends of the two columns are detachably connected to one side of the grading table, and the top ends of the two columns are respectively connected to the two ends of the crossbeam. The lamp tube is arranged on the crossbeam.

3. The tobacco leaf grading table with dust removal function according to claim 1, characterized in that: The first dust removal chamber is provided with a primary filter which separates the entrance of the first dust removal chamber from the connecting port. The primary filter comprises a filter frame and a filter medium therein. The filter medium is made of non-woven fabric, glass fiber or metal mesh.

4. The tobacco grading table with dust removal function according to claim 3 is characterized in that: The opening of the first dust removal chamber is opened at the upper end of the first dust removal chamber. At least one air guide duct is provided in the first dust removal chamber. The opening of the air guide duct faces the opening of the first dust removal chamber, and the outlet of the air guide duct faces the connecting port.

5. The tobacco leaf grading table with dust removal function according to claim 4 is characterized in that: One side wall of the air guide duct is the side wall of the first dust removal chamber, and the other side wall of the air guide duct with an opening encloses a space, and the space is used to place the primary filter.

6. The tobacco leaf grading table with dust removal function according to claim 1, characterized in that: The bag filter is a cylindrical filter, comprising a metal frame and a polyester fiber filter cloth, wherein the polyester fiber filter cloth is sleeved on the outside of the metal frame; The bag opening of the bag filter is fixedly connected to the bracket, the outer edge of the bracket is provided with screw holes, the bag filter is fixed to the side wall of the second dust removal chamber by screws screwed in the screw holes, and the bracket surrounds the communication port.

7. The tobacco leaf grading table with dust removal function according to claim 6 is characterized in that: A sealing gasket is provided between the bracket and the communicating port; A debris and dust collection box is provided at the lower part of the first dust removal chamber and the second dust removal chamber.

8. The tobacco grading platform with dust removal function according to claim 1, characterized in that: The centrifugal fan is a multi-blade centrifugal fan.

9. The tobacco leaf grading table with dust removal function according to claim 1, characterized in that: The inlet of the first dust removal chamber is arranged upward, the second dust removal chamber and the centrifugal fan chamber are both located on one side of the first dust removal chamber, and the outlet of the centrifugal fan faces the guide plate opened on the side wall of the centrifugal fan chamber.

10. The tobacco leaf grading table with dust removal function according to claim 1, characterized in that: The grading table is made of cold-rolled stainless steel plate, and is provided with foldable table legs. The upper ends of the table legs are provided with folding hinges, one end of the folding hinge is rotatably connected to the lower part of the table top, and the other end is rotatably connected to the table legs; The drawer is provided with slide rail slots on both sides, which are coupled with the second slide rails provided at the lower part of the desktop; A filter is provided at the opening at the bottom of the drawer; The lamp tubes include 2 cold-color T8 lamp tubes and 1 warm-color T8 lamp tube, and the power of the lamp tubes is 20W.

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