Compound tobacco leaf curing turnover protection bag

Abstract

This utility model relates to the field of tobacco harvesting and transportation technology, and discloses a composite protective bag for tobacco harvesting and curing. It includes a harvesting frame, with a protective bag body inside the frame. A bag opening ring is fixedly connected to the top of the protective bag body. A tightening strap is threaded through the inner wall of the bag opening ring, and racks are fixedly connected to both ends of the tightening strap. The racks are connected to each other via a connecting sleeve. Positioning teeth are provided in the middle of the inner wall of the connecting sleeve. A rotating cover is rotatably connected to the front of the connecting sleeve, and a slot is provided on the rear side of the rotating cover. A rotating ring is provided on the inner wall of the slot. In this utility model, the side viewing window uses red PE film, allowing inspection of the tobacco leaf condition without damaging the light protection. The modular shoulder strap interface is compatible with standard harvesting baskets, achieving integrated "harvesting-loading-transportation" and reducing labor intensity by 30%. The composite light-blocking structure keeps the internal temperature of the bag below 3°C, preventing chlorophyll decomposition, high-temperature deterioration, and moisture-induced mold growth.

Description

Technical Field

[0001] This utility model relates to the field of tobacco harvesting and conveying technology, and in particular to a composite protective bag for tobacco harvesting and curing. Background Technology

[0002] Tobacco leaf harvesting and curing is the core process in tobacco agricultural production that connects field harvesting with industrial processing. It refers to the entire process of transforming fresh tobacco leaves into qualified dry tobacco leaves through professional curing technology after harvesting according to the maturity standards. During the harvesting stage, each plant must be selectively picked according to the maturity of the leaves to avoid mixing in overripe or immature tobacco leaves; after harvesting, the tobacco leaves must be promptly transported to the curing barn for curing.

[0003] However, during the tobacco harvesting and curing stages of tobacco agricultural production, due to technical and facility limitations in the connection between harvesting and curing processes, the physical capacity of curing barns is limited, and the uneven maturity of tobacco leaves necessitates harvesting in batches. Harvested tobacco leaves must be temporarily stored on the field ridges. These field ridges are located in open areas with no obstructions, where the solar radiation intensity at noon in sunny summer reaches 1000–1200 W / m². 2 Freshly harvested tobacco leaves have a moisture content of 80%–85% and their cuticle is not yet hardened, making them less tolerant of environmental stress. Strong light creates a significant contradiction with the physiological characteristics of tobacco leaves. Strong light damages tobacco leaves both physically and chemically: physically, it raises the surface temperature of the leaves to 35-40°C, accelerating water evaporation and reducing the moisture content to below 60%. This causes cell walls to separate, shrivel, and become brittle and easily broken. Chemically, ultraviolet radiation and high temperatures work together to destroy pigments (chlorophyll and carotenoids degrade, causing discoloration) and aroma precursors (terpenes and phenols decompose, producing off-flavors), and can even trigger caramelization. Tobacco leaves exposed to strong light for more than 4 hours have a 15%–20% reduction in the proportion of high-quality tobacco, resulting in an economic loss of 10%–12%. Although tobacco farmers are aware of the damage, they find it difficult to effectively mitigate it due to a lack of temporary shading and moisture-retaining facilities, and a mismatch between the harvesting and curing progress and the turnover efficiency of the curing barns. This suggests the need to optimize the layout of harvesting and curing facilities, develop low-cost temporary shading technologies, and precisely control the harvesting batches and curing barn plans to reduce the exposure time of tobacco leaves during temporary storage and thus reduce losses.

[0004] In response to this technical problem, this application proposes a composite protective bag for tobacco harvesting and curing. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a composite protective bag for tobacco harvesting and curing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A composite protective bag for tobacco harvesting and curing includes a harvesting frame, an inner protective bag body, a bag opening ring fixedly connected to the top of the protective bag body, a tightening strap passing through the inner wall of the bag opening ring, racks fixedly connected to both ends of the tightening strap, the racks being connected to each other via a connecting sleeve, a positioning tooth provided at the middle of the inner wall of the connecting sleeve, a rotating cover rotatably connected to the front of the connecting sleeve, a slot provided on the rear side of the rotating cover, a rotating ring provided on the inner wall of the slot, the rear side of the rotating ring being connected to the racks via an adjusting component, and locking strips fixedly connected to both sides of the outer wall of the rotating ring, the outer ends of the locking strips engaging with the positioning teeth, the front side of the locking strips being connected to the rotating cover via a movable component.

[0007] Furthermore, the adjusting assembly includes a gear, which is fixedly connected to the rear side of the rotating ring, and the rack has a toothed groove at its middle end that meshes with the gear.

[0008] Furthermore, the movable component includes a pressure rod and a reserved through slot. The front outer end of the card strip is fixedly connected to the pressure rod, and the front two ends of the reserved through slot are provided with reserved through slots. The size of the reserved through slot is adapted to the size of the pressure rod.

[0009] Furthermore, the protective bag includes an inner lining layer, an intermediate layer is disposed on the outer surface of the inner lining layer, an outer layer is disposed on the outer surface of the intermediate layer, and a side-viewing window is disposed on one side of the outer wall of the protective bag, the side-viewing window being made of red PE film.

[0010] Furthermore, the inner lining layer is made of a hydrophobic nonwoven fabric material.

[0011] Furthermore, the intermediate layer is made of 50-mesh black nylon mesh, and its light transmittance is adjusted to 5%–8%.

[0012] Furthermore, the outer surface layer is made of a silver-plated aluminum film material.

[0013] Furthermore, a drawstring ring is provided at the top inner side of the protective bag, and a drawstring strap is inserted inside the drawstring ring. Both sides of the outer wall of the picking frame are fixedly connected with shoulder strap earrings.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the side viewing window uses a red PE film with a wavelength of 600nm and high transmittance, which can directly inspect the condition of tobacco leaves without damaging the light protection effect. Furthermore, it is compatible with standard picking baskets through a modular shoulder strap interface, realizing integrated operation of "picking-loading-transporting". Compared with the existing decentralized operation, it reduces labor intensity by 30% and fully adapts to the actual needs of tobacco leaf picking and curing turnover.

[0015] 2. In this utility model, a composite light-shielding structure consisting of an outer silver aluminized film, a middle 50-mesh black nylon mesh, and an inner hydrophobic non-woven fabric lining achieves a light transmittance of ≤100 μmol·m⁻¹ in the 400-700nm wavelength band. -2 ・s -1 The temperature is below the field irradiance threshold, and the double-layer air gap keeps the temperature inside the bag below 3°C at 35°C, effectively preventing strong light from causing chlorophyll decomposition and high-temperature deterioration of tobacco leaves. The hydrophobic non-woven fabric lining can also prevent condensation and allow for air permeability, solving the problem that existing protective bags are prone to mold growth on tobacco leaves due to moisture. Attached Figure Description

[0016] Figure 1 This is a perspective view of a composite protective bag for tobacco harvesting and curing proposed in this utility model; Figure 2 This is a schematic diagram of the connecting sleeve structure of a composite tobacco leaf harvesting and curing turnover protective bag proposed in this utility model; Figure 3 This is a schematic diagram of the rotating structure of a composite tobacco leaf harvesting and curing turnover protective bag proposed in this utility model; Figure 4 for Figure 2 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the protective bag structure of a composite tobacco leaf harvesting and curing turnover protective bag proposed in this utility model.

[0017] Legend: 1. Harvesting frame; 2. Shoulder strap with ear loops; 3. Protective bag body; 4. Drawstring ring; 5. Drawstring strap; 6. Bag opening ring; 7. Tightening strap; 8. Rack and pinion; 9. Connecting sleeve; 10. Rotary ring; 11. Locking strip; 12. Gear; 13. Pressure bar; 14. Rotating cover; 15. Locking groove; 16. Reserved through groove; 17. Positioning teeth; 18. Inner lining layer; 19. Middle layer; 20. Outer layer; 21. Side viewing window. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Reference Figures 1-3This utility model provides an embodiment of a composite tobacco leaf harvesting and curing turnover protective bag, including a harvesting frame 1, a protective bag body 3 inside the harvesting frame 1, a bag opening ring 6 fixedly connected to the top of the protective bag body 3, a tightening strap 7 passing through the inner wall of the bag opening ring 6, and racks 8 fixedly connected to both ends of the tightening strap 7. The racks 8 at both ends are connected through connecting sleeves 9. A positioning tooth 17 is provided at the middle of the inner wall of the connecting sleeve 9. A rotating cover 14 is rotatably connected to the front side of the connecting sleeve 9. A slot 15 is opened on the rear side of the rotating cover 14. A rotating ring 10 is provided on the inner wall of the slot 15. The rear side of the rotating ring 10 is connected to the adjusting component. The rack 8 is connected to the rotating ring 10. The outer sides of the rotating ring 10 are fixedly connected to the retaining strips 11. The outer ends of the retaining strips 11 on both sides are engaged with the positioning teeth 17. The front side of the retaining strips 11 is connected to the rotating cover 14 through the movable component. The adjusting component includes a gear 12, which is fixedly connected to the rear side of the rotating ring 10. The middle end of the rack 8 is provided with a tooth groove that meshes with the gear 12. The movable component includes a pressure rod 13 and a reserved through groove 16. The outer front end of the retaining strips 11 is fixedly connected to the pressure rod 13. The two ends of the reserved through groove 16 on the front side are provided with reserved through grooves 16. The size of the reserved through groove 16 is adapted to the size of the pressure rod 13. Specifically, a bag opening ring 6 is fixedly connected to the top of the protective bag body 3. The bag opening ring 6 provides the mounting base for the tightening structure. The tightening strap 7, which passes through its inner wall, is used to tighten the top opening of the protective bag body 3. The racks 8, which are fixedly connected to both ends of the tightening strap 7, are connected to the connecting sleeve 9. The positioning teeth 17 in the middle of the inner wall of the connecting sleeve 9 are used to cooperate with the locking strip 11 to achieve positioning. The rotating cover 14, which is rotatably connected to the front side of the connecting sleeve 9, can drive the rotating ring 10 to rotate. The locking groove 15 opened on the rear side of the rotating cover 14 is used to install the rotating ring 10. The rear side of the rotating ring 10 is connected to the rack 8 through an adjusting component. The adjusting component includes a gear 12 fixed on the rear side of the rotating ring 10. The tooth groove opened in the middle of the rack 8 meshes with the gear 12. When the rotating cover 14 is rotated, the rotating ring 10 drives the gear 12 to rotate. The gear 12 meshes with the rack 8 to adjust the tightness of the tightening strap 7. The operation is convenient. Furthermore, it offers high adjustment precision. The locking strips 11, which are fixedly connected to both sides of the outer wall of the rotating ring 10, can engage with the positioning teeth 17 at their outer ends. When the tightening band 7 is adjusted to the appropriate tightness, the locking strips 11 engage with the positioning teeth 17 to prevent the tightening band 7 from loosening and ensure a stable tightening state at the bag opening. The front side of the locking strip 11 is connected to the rotating cover 14 via a movable component. The movable component includes a pressure rod 13 fixed to the outer end of the front side of the locking strip 11 and reserved through slots 16 opened at both ends of the front side of the connecting sleeve 9. The size of the reserved through slots 16 is adapted to the size of the pressure rod 13. When it is necessary to loosen the tightening band 7, the pressure rod 13 is pressed, and the pressure rod 13 moves along the reserved through slots 16, causing the locking strip 11 to disengage from the positioning teeth 17. Then, the rotating cover 14 can be rotated in the opposite direction to adjust the tightening band 7. The overall adjustment structure is simple to operate and reliable to fix, avoiding the problems of easy loosening and difficulty in adjustment of the traditional rope end. Reference Figures 3-5The protective bag 3 includes an inner lining layer 18, an intermediate layer 19 on the outer surface of the inner lining layer 18, an outer layer 20 on the outer surface of the intermediate layer 19, a side viewing window 21 on one side of the outer wall of the protective bag 3, the side viewing window 21 being made of red PE film; the inner lining layer 18 being made of hydrophobic non-woven fabric; the intermediate layer 19 being made of 50-mesh black nylon mesh, with light transmittance controlled to 5%–8%; the outer layer 20 being made of silver aluminized film; a drawstring ring 4 being provided at the top inner side of the protective bag 3, with a drawstring strap 5 passing through the inside of the drawstring ring 4; and shoulder strap earrings 2 being fixedly connected to both sides of the outer wall of the picking frame 1. Specifically, the picking frame 1 provides a supporting foundation for the overall structure, facilitating the carrying of the protective bag 3 and the tobacco leaves inside. The shoulder straps 2, fixedly connected to both sides of its outer wall, allow for the attachment of shoulder straps, making it easy for operators to carry and transport the tobacco leaves, reducing the labor intensity of manual handling. The picking frame 1 contains the protective bag 3, which directly holds the tobacco leaves. A drawstring 4 at the top of the bag, in conjunction with the drawstring strap 5 inside, helps to tighten the top opening of the protective bag 3, enhancing its sealing and protection. The protective bag 3 includes an inner lining layer 18, a middle layer 19, and an outer layer 20. The inner lining layer 18 is made of hydrophobic non-woven fabric, effectively isolating... To prevent moisture from seeping into the tobacco leaves and causing mold, the middle layer 19 is made of 50-mesh black nylon mesh with a light transmittance controlled to 5%–8%. This simulates the low-light environment required for tobacco storage, preventing direct sunlight from causing chlorophyll decomposition and quality degradation. The outer layer 20 is made of silver aluminized film, which reflects sunlight and heat, preventing excessively high temperatures inside the bag during handling and maintaining the freshness of the tobacco leaves. The side window 21 on one side of the outer wall of the protective bag 3 is made of red PE film, allowing operators to easily observe the quantity and condition of the tobacco leaves inside the bag and filtering strong light to further protect the leaves.

[0019] Working principle: When using this reusable protective bag, first insert the shoulder straps into the shoulder strap ear loops 2 on both sides of the outer wall of the picking frame 1 to facilitate subsequent carrying and transportation; then loosen the drawstring 5 inside the drawstring ring 4 at the top of the inner side of the protective bag body 3, open the opening of the protective bag body 3, and put the picked tobacco leaves into the protective bag body 3. After the tobacco leaves are packed, first pull the drawstring 5 to tighten the top opening of the protective bag 3, and then further seal it through the structure at the bag opening ring 6: rotate the rotating cover 14 on the front side of the connecting sleeve 9. The rotating cover 14 drives the rotating ring 10 to rotate through the slot 15. The gear 12 on the rear side of the rotating ring 10 meshes with the tooth grooves of the racks 8 at both ends of the tightening belt 7 to adjust the tightness of the tightening belt 7. When the tightness is appropriate, the locking strip 11 on the outer wall of the rotating ring 10 engages with the positioning teeth 17 on the inner wall of the connecting sleeve 9 to fix the tightening belt 7 and prevent it from loosening. If adjustment is required, press the pressure rod 13 on the front side of the locking strip 11. The pressure rod 13 moves along the reserved through groove 16, which drives the locking strip 11 to disengage from the positioning teeth 17, and the adjustment can be reversed. During transport, the silver aluminized film on the outer layer 20 of the protective bag 3 reflects external sunlight and heat, preventing the inside of the bag from overheating; the 50-mesh black nylon mesh in the middle layer 19 creates a low-light environment to prevent the decomposition of chlorophyll in the tobacco leaves; the hydrophobic non-woven fabric in the inner lining layer 18 isolates moisture and prevents the tobacco leaves from becoming moldy; the quantity and condition of the tobacco leaves inside the bag can be observed at any time through the side viewing window 21 on the outer wall of the protective bag 3. When removing the tobacco leaves, press the lever 13 to release the tightening strap 7, remove the leaves from the picking frame 1, and then pull open the drawstring 5 to remove the tobacco leaves from the protective bag 3, completing one tobacco leaf harvesting and curing turnover operation.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite tobacco curing turnover protection bag, characterized in that, The system includes a picking frame (1), inside which is a protective bag (3). A bag opening ring (6) is fixedly connected to the top of the protective bag (3). A tightening strap (7) is threaded through the inner wall of the bag opening ring (6). Both ends of the tightening strap (7) are fixedly connected to racks (8). The racks (8) at both ends are connected by a connecting sleeve (9). A positioning tooth (17) is provided at the middle of the inner wall of the connecting sleeve (9). The front side of the connecting sleeve (9) is rotatably connected to... A rotating cover (14) is attached, and a slot (15) is provided on the rear side of the rotating cover (14). A rotating ring (10) is provided on the inner wall of the slot (15). The rear side of the rotating ring (10) is connected to the rack (8) through an adjustment component. A locking strip (11) is fixedly connected to both sides of the outer wall of the rotating ring (10). The outer ends of the locking strips (11) on both sides are engaged with the positioning teeth (17). The front side of the locking strips (11) is connected to the rotating cover (14) through a movable component.

2. The composite tobacco curing turnover protection bag according to claim 1, characterized in that: The adjustment assembly includes a gear (12), which is fixedly connected to the rear side of the rotating ring (10), and the rack (8) has a tooth groove at the middle end that meshes with the gear (12).

3. The composite tobacco curing turnover protection bag according to claim 1, characterized in that: The active component includes a pressure rod (13) and a reserved through slot (16). The front outer end of the clip (11) is fixedly connected to the pressure rod (13). Both ends of the front side of the reserved through slot (16) are provided with reserved through slots (16). The size of the reserved through slot (16) is adapted to the size of the pressure rod (13).

4. The composite tobacco curing turnover protection bag according to claim 1, characterized in that: The protective bag (3) includes an inner lining layer (18), an outer layer (19) is provided on the outer surface of the inner lining layer (18), an outer layer (20) is provided on the outer surface of the outer layer (19), and a side viewing window (21) is provided on one side of the outer wall of the protective bag (3), the side viewing window (21) is made of red PE film.

5. The composite tobacco curing turnover protective bag according to claim 4, characterized in that: The inner lining (18) is made of hydrophobic nonwoven material.

6. The composite tobacco curing turnover protective bag according to claim 4, characterized in that: The intermediate layer (19) is made of 50-mesh black nylon mesh, and its light transmittance is controlled to 5% to 8%.

7. The composite tobacco curing turnover protective bag according to claim 4, characterized in that: The outer surface layer (20) is made of silver aluminum-plated film material.

8. The composite tobacco curing turnover protective bag according to claim 1, characterized in that: The protective bag body (3) has a drawstring ring (4) at the top inner side, and a drawstring strap (5) is inserted inside the drawstring ring (4). The picking frame (1) has a strap earring (2) fixedly connected to both sides of its outer wall.

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