A fresh corn storage device

Abstract

The application discloses a fresh corn storage device, which comprises a storage tray, the storage tray comprises a plurality of layers of stacked bearing storage units, each bearing storage unit comprises a tray and side guards which are detachably inserted on the top of the four sides of the tray, and the corner portions of the upper and lower two adjacent layers of bearing storage units can be matched with composite positioning connections, so that a three-dimensional protection system which is coupled with each other in vertical bearing and horizontal side directions can be formed, the three-dimensional protection system comprises vertical buffer structures and horizontal buffer structures, the vertical buffer structures are arranged in the tray, and the horizontal buffer structures are arranged on the side guards, the column section is accurately calculated according to the strength condition sigma=F / S<=[sigma], the weight of the traditional industrial-grade steel structure tray is reduced by 30%-40%, the number of transport vehicles is reduced by more than 46%, and the utilization rate of the storage space is increased from 60% to 90%.

Description

Technical Field

[0001] This invention relates to the field of storage technology, and more specifically to a fresh corn storage device. Background Technology

[0002] Fresh and common corn require high standards for pallet load-bearing capacity, anti-slip properties, anti-scattering properties, and environmental adaptability during post-harvest storage, transportation, and stacking. Currently, post-harvest corn distribution mainly uses wooden pallets, plastic pallets, and industrial general-purpose steel structure pallets. Wooden pallets have a static load capacity of ≤1.5 tons, and plastic pallets have a dynamic load capacity of ≤1.8 tons, leading to increased transport vehicle trips, limited warehouse stacking, and a space utilization rate of only about 60%. At the same time, wooden pallets are prone to moisture and rot, and their lifespan is only 1-2 years when the humidity is ≥70%. Plastic pallets have a cracking rate of over 30% below -20℃. While ordinary steel structure pallets are strong, their rust prevention treatment is simple, and the corrosion rate can exceed 40% within one year in high humidity environments, causing a sharp drop in load-bearing capacity. Furthermore, industrial-grade steel structure pallets are mostly made of thick-walled steel, with a single pallet weighing over 50kg, requiring heavy-duty forklifts. They cost 300-500 yuan per pallet and lack customized designs for corn. Additionally, the welding points and corners are prone to corrosion, making them unsuitable for a wide temperature range of -30℃ to 50℃ and humidity ≤85%. Their lifespan is generally less than 5 years. Summary of the Invention

[0003] To overcome the problems of the prior art, the present invention provides a fresh corn storage device.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a fresh corn storage device, including a storage tray, wherein the storage tray includes multiple stacked load-bearing storage units, each load-bearing storage unit includes a tray and side guardrails that can be detachably inserted into the four sides of the top of the tray, and the corners of two adjacent load-bearing storage units can be connected in a composite positioning manner to form a three-dimensional protection system that couples vertical load-bearing and horizontal side. The three-dimensional protection system includes a vertical buffer structure and a horizontal buffer structure, wherein the vertical buffer structure is disposed inside the tray and the horizontal buffer structure is disposed on the side guardrails.

[0005] The aforementioned fresh corn storage device includes a tray comprising four uprights at the four corners and a square frame beam that surrounds and connects adjacent uprights. The uprights and the frame beam form a square frame, and a corn support component is fixed inside the square frame. The cross-sectional dimensions and wall thickness of the uprights are calculated and determined based on the strength condition σ=F / S≤[σ], where σ is the actual stress of the component, F is the rated load borne by a single column, and S is the cross-sectional area of ​​the component under stress.

[0006] In the aforementioned fresh corn storage device, the side of the column is fixedly connected to the side of the frame beam, and a connector is fixedly provided at the connection. One side of the connector is fixed to the side of the column, and the other side is sleeved on the outer side of the end of the frame beam. The connector includes snap-fit ​​blocks fixed to both sides of the frame beam and the bottom surface of the frame beam. Each snap-fit ​​block is inserted into a snap-fit ​​groove. The snap-fit ​​groove is fixed to a U-shaped connecting plate, and the U-shaped connecting plate is fixed to the side of the column and sleeved on the side of the frame beam. A rubber layer is fixed on the inner wall of the snap-fit ​​groove, and the snap-fit ​​block and the snap-fit ​​groove are interference-fitted.

[0007] The aforementioned fresh corn storage device includes an upper corrugated support plate and a lower corrugated support plate, with their crests and troughs corresponding to each other and forming multiple buffer cavities. Each buffer cavity is fitted with an elastic buffer sphere. The maximum deflection δ of the upper corrugated support plate under rated load satisfies δ≤[δ], where δ is the actual deformation of the support plate. The maximum deflection δ of the upper corrugated support plate under rated load is less than the ultimate compression of the elastic buffer sphere.

[0008] In the aforementioned fresh corn storage device, a first stacking positioning groove is fixed on the top surface of the column, and a support base is fixed on the bottom surface. An installation groove is fixed inside the support base, and a spring is fixed at the top of the installation groove. A stacking positioning post is fixedly connected to the bottom end of the spring. The stacking positioning post slides against the inner wall of the installation groove. The stacking positioning post can be elastically inserted into the first stacking positioning groove or the second stacking positioning groove on the top surface of the side guardrail, and the insertion point is provided with an interference fit of a rubber layer.

[0009] In the aforementioned fresh corn storage device, the stiffness K of the spring and the rated compression ΔL satisfy the following: spring preload F_spring = K·ΔL, and when the stacking positioning post elastically presses against the ground or is inserted into the stacking positioning slot, the spring is in a compressed state, and the static friction f between the pallet and the ground or adjacent pallets satisfies f = μ·N, where... N = G + F_spring, where G is the total weight of the pallet and the corn it carries, μ is the coefficient of friction of the contact surface, and f ≥ F_inertia, where F_inertia is the maximum horizontal inertial force generated during the handling process.

[0010] The aforementioned fresh corn storage device includes four positioning rods at the four corners and guardrail components connected adjacent to the positioning rods. The positioning rods and guardrail components form a square guardrail frame by encircling each other. The bottom end of each positioning rod is inserted into a guardrail mounting positioning groove fixed to the top surface of the column. The guardrail mounting positioning groove is fixed to the top surface of the column and fits on the outside of the first stacking positioning groove. The bottom edge of the positioning rod is chamfered. A rubber layer is fixed on the inner side of the guardrail mounting positioning groove. The positioning rod and the guardrail mounting positioning groove are interference fit.

[0011] The aforementioned fresh corn storage device includes a guardrail consisting of multiple spring rods connected sequentially from top to bottom between two positioning rods. Each spring rod has a fixing rod fixedly connected to both ends. The fixing rod passes through the positioning hole on the positioning rod and is locked by a pin. Multiple rubber sleeves are sequentially fitted horizontally on each spring rod. Adjacent rubber sleeves are fixedly connected by an elastic connecting rope. The rubber sleeves can slide along the axial direction of the spring rod, and the outer surface of the rubber sleeve is provided with anti-slip texture. The side wall is provided with an axial through-cut for radially opening and fitting onto the spring rod.

[0012] In the above-mentioned fresh corn storage device, a second stacking positioning groove is fixed on the top surface of the positioning rod, a rubber layer is fixed on the inner side of the second stacking positioning groove, and the stacking positioning column can be inserted into the second stacking positioning groove and have an interference fit with it.

[0013] The above-mentioned fresh corn storage device has a three-layer composite anti-rust layer on the overall surface of the column and tray, consisting of a hot-dip galvanized layer, an epoxy resin layer, and a local anti-rust primer, wherein the thickness of the hot-dip galvanized layer is ≥60μm, the thickness of the epoxy resin layer is ≥20μm, and the thickness of the anti-rust primer is ≥10μm.

[0014] The beneficial effects of this invention are:

[0015] Based on the strength condition σ=F / S≤[σ], the column cross-section is accurately calculated, resulting in a 30%-40% weight reduction compared to traditional industrial-grade steel structure pallets, reducing the number of transport trips, and increasing the utilization rate of warehouse space from 60% to 90%.

[0016] The side guardrail is connected to the guardrail mounting slot by an interference fit through the positioning rod, which can be quickly disassembled and assembled without tools. When loading and unloading corn, the guardrail can be removed to accommodate direct forklift lifting operations from the top, reducing the loading and unloading time of a single pallet. When transporting, the guardrail is installed and used with a waterproof canvas pad to form a three-dimensional protective space.

[0017] The upper wave bearing plate, elastic buffer ball, lower wave bearing plate, spring rod, sliding rubber sleeve, and elastic connecting rope are orthogonally arranged and work together to absorb energy. The buffer channels are independent of each other, effectively preventing the corn husk from directly impacting the rigid body.

[0018] It adopts a three-layer composite anti-rust layer of hot-dip galvanizing + epoxy resin + local anti-rust primer. The hot-dip galvanizing layer is ≥60μm, the epoxy resin layer is ≥20μm, and the primer is ≥10μm. The rust area is ≤5% after 480 hours of neutral salt spray test. It can adapt to the storage environment of -30℃ to 50℃ and humidity ≤85%, and has a service life of more than 8 years.

[0019] The U-shaped connecting plate and the snap-fit ​​block are interference-fitted, and the rubber layer absorbs assembly errors, dispersing the concentrated stress at the end of the frame beam to the side of the column, thus avoiding cracking of traditional welded joints under heavy loads or impacts. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure described in this invention;

[0022] Figure 2 This is a schematic diagram of the single-unit bearing storage unit structure described in this invention;

[0023] Figure 3 This is a schematic diagram of the tray structure described in this invention;

[0024] Figure 4 As described in this invention Figure 3 A schematic diagram of the exploded structure;

[0025] Figure 5 As described in this invention Figure 3 A schematic diagram of the side sectional view of the structure;

[0026] Figure 6 As described in this invention Figure 3 A partial structural diagram;

[0027] Figure 7 This is a schematic diagram of the side guardrail structure described in this invention;

[0028] Figure 8 As described in this invention Figure 7 Schematic diagram of a partial structure;

[0029] Figure 9 This is a partial structural diagram of the guardrail component described in this invention.

[0030] In the diagram: 1. Storage pallet; 2. Pallet; 3. Side railing; 4. Post; 5. Frame beam; 6. Corn support component; 7. Clip-on block; 8. U-shaped connecting plate; 9. Railing installation positioning groove; 10. First stacking positioning groove; 11. Installation groove; 12. Stacking positioning post; 13. Spring; 14. Upper corrugated support plate; 15. Lower corrugated support plate; 16. Elastic buffer ball; 17. Positioning rod; 18. Railing component; 19. Second stacking positioning groove; 20. Spring rod; 21. Fixing rod; 22. Pin; 23. Rubber sleeve; 24. Elastic connecting rope; 25. Positioning hole. Detailed Implementation

[0031] Example

[0032] like Figure 1 , Figure 2As shown, a fresh corn storage device includes a storage pallet 1, which comprises multiple stacked storage units. Each storage unit includes a pallet 2 and side rails 3 that can be detachably inserted into the top four sides of the pallet 2. The corners of two adjacent storage units can be connected in a composite positioning manner to form a three-dimensional protection system that couples vertical support and horizontal side support, and adapts to the lateral impact when fresh corn is stacked. The three-dimensional protection system refers to a protection system in which vertical buffer structure and horizontal buffer structure are orthogonally arranged in space and functionally cooperate to absorb energy. The vertical buffer structure absorbs vertical compression energy through multi-level elastic deformation, and the horizontal buffer structure absorbs lateral impact energy through composite deformation of rod bending and sleeve sliding. The two form independent buffer channels in the storage unit to avoid the superposition and accumulation of vertical and lateral impact energy on a single structure, thereby adapting to both vertical compression when fresh corn is stacked and lateral impact during transportation.

[0033] like Figure 3 As shown, the pallet 2 includes four uprights 4 set at the four corners, and a square frame beam 5 that surrounds and connects the uprights 4 in sequence. In this way, the four uprights 4 and the four frame beams 5 surround to form a square frame, and a corn support 6 is fixed inside the square frame.

[0034] The strength condition σ = F / S ≤ [σ] is used to verify the cross-section of column 4, where σ is the actual stress of the component, F is the rated load borne by a single column, S is the cross-sectional area of ​​the component under stress, and [σ] = 345MPa is the allowable stress of Q345 steel. The reasonable cross-sectional area and wall thickness of the steel are calculated by reverse deduction from the load and allowable stress. If the rated load of a single plate is 3.0 tons, the load borne by a single column is F = 3000kg × 9.8N / kg ÷ 4 = 7350N; selecting a column cross-section of 50mm × 20mm and a wall thickness of 2.0mm, then... The cross-sectional area under stress is S = (50 × 20) − (46 × 16) = 1000 − 736 = 264 mm², σ = 7350 / 264 = 27.8 MPa ≤ [σ] = 345 MPa, with a safety margin of 12.4 times. Under this safety margin, the wall thickness is reduced from 3–5 mm for industrial-grade pallets to 1.8–2.2 mm, the steel consumption per pallet is reduced to 24 kg, and the weight is controlled to 30–35 kg. This achieves both heavy-duty requirements and lightweighting by relying on precise mechanical selection, reducing the difficulty of manual and forklift transportation.

[0035] The side of the upright column 4 is fixedly connected to the side of the frame beam 5, and a connector is fixedly installed at the connection. One side of the connector is fixed to the side of the upright column 4, and the other side is sleeved on the outside of the end of the frame beam 5. The connector can help position the connection between the upright column 4 and the frame beam 5 before welding. At the same time, during subsequent use, it will disperse the concentrated stress at the end of the frame beam 5 to the side of the upright column 4, so as to avoid the direct breakage of the connection and the instability of the pallet 2 structure, thereby preventing the corn from falling and being damaged.

[0036] like Figure 4 , Figure 5 As shown, the connector includes snap-fit ​​blocks 7 fixed on both sides of the frame beam 5 and on the bottom surface of the frame beam 5. Each snap-fit ​​block 7 is inserted into a snap-fit ​​groove. The snap-fit ​​groove is fixed on the U-shaped connecting plate 8, and the U-shaped connecting plate 8 is fixed on the side of the column 4 and fitted onto the side end of the frame beam 5. A rubber layer is fixed on the inner wall of the snap-fit ​​groove. The snap-fit ​​groove and the snap-fit ​​block 7 are interference fit. The elastic deformation of the rubber layer absorbs the assembly error between the frame beam 5 and the column 4 and provides a slight buffer when bearing load, so as to avoid the rigid welding point from cracking due to stress concentration.

[0037] The top surface of the column 4 is fixed with a first stacking positioning groove 10, and the bottom surface is fixed with a support base. The support base is fixed with an installation groove 11. The top of the installation groove 11 is fixed with a spring 13, and the bottom end of the spring 13 is fixedly connected with a stacking positioning column 12. The stacking positioning column 12 slides and fits against the inner wall of the installation groove 11. The lower outer edge of the stacking positioning column 12 is chamfered. The entire surface of the column 4 and the frame adopts a three-layer composite anti-rust process of hot-dip galvanizing + epoxy resin + local anti-rust primer. The thickness of the hot-dip galvanizing layer is ≥60μm, the thickness of the epoxy resin layer is ≥20μm, and the welding points and corners and other easily corroded parts are additionally coated with ≥10μm anti-rust primer. This ensures that the rust area is ≤5% after 480 hours of neutral salt spray test. It can adapt to a wide temperature range of -30℃ to 50℃ and a high humidity storage environment of ≤85%, and the service life is increased to more than 8 years. It effectively solves the defects of ordinary steel structure pallets with a rust rate of more than 40% and a low temperature brittleness rate of more than 30% within 1 year in a high humidity environment.

[0038] When the pallet 2 is placed on the ground, the stacking positioning post 12 is pushed into the mounting groove 11 by the ground action, and the spring 13 is compressed by the force.

[0039] According to Hooke's Law: F_spring = K·ΔL, where K is the spring stiffness and ΔL is the rated compression. When the spring (13) is in a compressed state, it provides a preload force F_spring, so that the palletizing positioning post (12) is elastically pressed against the ground or inserted into the palletizing positioning groove. Combined with the static friction judgment formula: f = μ·N, where the ground normal pressure N = G + F_spring, G is the total weight of the pallet and the corn it carries, and μ is the friction coefficient of the contact surface. When fully loaded, the static friction force f between the pallet 2 and the ground is greater than the maximum horizontal inertial force F_inertia when the forklift stops suddenly, ensuring that it does not slip when it lands. When the pallet is unloaded, the spring preload force and the pallet's own weight work together to make the static friction force between the upper and lower layers greater than the horizontal inertial force during handling, ensuring that the pallet is not misaligned.

[0040] When multiple pallets 2 are placed empty, the support base of the upper pallet 2 is placed on the top surface of the column 4 of the lower pallet 2, and the palletizing positioning column 12 can be inserted into the first palletizing positioning groove 10. At the same time, the spring 13 is still in a compressed state and generates force. Meanwhile, a rubber layer is fixed on the inner side of the first palletizing positioning groove 10. The palletizing positioning column 12 and the first palletizing positioning groove 10 adopt an interference fit, which allows for slight adaptive leveling between the upper and lower layers during palletizing, and limits horizontal slippage through the radial clamping force of the rubber layer. This universal palletizing positioning structure is suitable for both empty pallets 2 and fully loaded corn pallets 2. The maximum number of stacking layers can reach 5, the total stacking load is ≥14.0 tons, and the storage space utilization rate is increased from 60% to 90%.

[0041] like Figure 6 As shown, the corn support component 6 consists of an upper wave support plate 14 and a lower wave support plate 15. The peaks and troughs of the two correspond to each other, and the peaks and troughs enclose and form multiple buffer cavities. Each buffer cavity is embedded with an elastic buffer ball 16. Such peaks provide multi-point support for the fresh corn, reducing the direct contact area between the corn and the support surface and reducing compression damage.

[0042] The deformation of the bearing plate is controlled by the deflection condition δ≤[δ], where δ is the actual deformation of the bearing plate. It is determined by mechanical calculation and prototype testing. Under a uniformly distributed load of 3.0 tons, the maximum deflection of the upper wave bearing plate (14) is set to 8.7mm. The safety factor is taken as 1.15, and [δ] = 10mm is obtained. This ensures that the deformation of the plate does not touch the limit compression of the lower buffer ball when fully loaded, and avoids excessive pressure on the plate to squeeze the corn kernels and skin, thereby reducing the probability of corn crushing damage from the source.

[0043] When fresh corn is placed on the corn support 6, the upper wave support plate 14 can undergo elastic deformation with the load, which, together with the elastic buffer ball 16 in the cavity, provides cushioning. At the same time, the lower wave support plate 15 provides bottom support reaction force, realizing multi-level buffering and shock absorption to reduce the risk of fresh corn being damaged by pressure.

[0044] like Figure 7 , Figure 8 , Figure 9As shown, the side guardrail 3 includes four positioning rods 17 at the four corners and guardrail components 18 connected adjacent to the positioning rods 17. The positioning rods 17 and guardrail components 18 are connected in a square ring to form a square guardrail frame. The bottom end of each positioning rod 17 is inserted into the guardrail mounting positioning groove 9. The guardrail mounting positioning groove 9 is fixed to the top surface of the column 4 and fits on the outside of the first stacking positioning groove 10. The bottom edge of the positioning rod 17 is chamfered. A rubber layer is fixed on the inner side of the guardrail mounting positioning groove 9. The positioning rod 17 and the guardrail mounting positioning groove 9 are interference fit. The side guardrail 3 can be quickly removed when loading and unloading corn, which is convenient for forklifts to pick up directly. When the side guardrail 3 is installed in the transportation and storage state, it is matched with a waterproof canvas pad to form a three-dimensional protective space, which controls the corn transportation spillage rate to less than 0.5%, and completely solves the problems of inconvenient loading and unloading of traditional fixed guardrails and easy leakage without guardrails.

[0045] A second stacking positioning groove 19 is fixed on the top surface of the positioning rod 17. A rubber layer is fixed on the inner side of the second stacking positioning groove 19, and a stacking positioning post 12 can be inserted into the second stacking positioning groove 19 with an interference fit. During the stacking process, the support seat of the upper pallet 2 is placed on the top surface of the positioning rod 17 of the lower side guardrail 3, and the stacking positioning post 12 is inserted into the second stacking positioning groove 19. At the same time, the spring 13 is still in a compressed state, generating force to achieve the stability of the stacking connection. At this time, the positioning rod 17 of the side guardrail 3 also serves as a transition support and positioning component between the upper and lower pallets 2, so that the stacking load is not only transmitted through the column 4, but also distributed to the side guardrail 3 frame through the positioning rod 17, thereby improving the overall stability of multi-layer stacking.

[0046] The guardrail component 18 includes multiple spring rods 20 connected sequentially from top to bottom between two positioning rods 17. High-elasticity spring rods are used as the main protective components. The horizontal buffer is achieved by the bending deformation of the rod itself. Together with the vertical buffer structure of the corn carrier, a three-dimensional protection system is formed. When fresh corn is tilted or collided during transportation, the spring rods 20 absorb the horizontal impact energy by their own bending deformation, providing lateral elastic buffer and preventing the corn from directly hitting the rigid rod and causing skin damage.

[0047] Each spring rod 20 has a fixing rod 21 fixedly connected to both ends. The fixing rod 21 fits through the positioning hole 25. The positioning hole 25 is fixed to the positioning rod 17, and the positioning holes 25 on the adjacent sides of the positioning rod 17 are staggered. The end of the fixing rod 21 is fixed with a through hole, and a pin 22 is inserted into the through hole to lock the fixing rod 21 onto the positioning rod 17.

[0048] Each spring rod 20 has multiple rubber sleeves 23 sequentially fitted horizontally. Adjacent rubber sleeves 23 are fixedly connected by elastic connecting ropes 24. The rubber sleeves 23 can slide along the axial direction of the spring rod 20.

[0049] The rubber sleeve 23 can slide along the spring rod 20 to adapt to the shape of the corn. The elastic connecting rope 24 plays the roles of limiting, automatic reset and auxiliary buffering. After the impact disappears, it releases the elastic restoring force, so that the rubber sleeve 23 automatically resets to the initial position. At the same time, the tensile deformation of the elastic connecting rope 24 provides auxiliary buffering, which works with the bending deformation of the spring rod 20 to absorb the lateral impact energy. The outer surface of the rubber sleeve 23 is provided with anti-slip texture, and a cut is fixedly provided on the side wall of the rubber sleeve 23. The cut is provided through the axial direction of the rubber sleeve 23, so that the rubber sleeve 23 can be opened radially and fitted onto the spring rod 20. After being fitted, it relies on the elasticity of the rubber to tighten and position itself.

[0050] Actual work process:

[0051] Remove the guardrail 18 on one side of the side guardrail 3, and the forklift starts working. Place the fresh corn on the surface of the corn carrier 6. The weight of the fresh corn and the stacking pressure act on the upper wave carrier plate 14, causing it to undergo elastic deformation and compress the elastic buffer ball 16 in the buffer cavity. The lower wave carrier plate 15 provides bottom support reaction force to form a buffer and reduce the squeezing damage of the fresh corn.

[0052] After loading is completed, the removed guardrail component 18 is reinstalled. The self-locking position is achieved by the interference fit of the rubber layer, and the guardrail assembly is completed. A waterproof canvas liner is laid in the area enclosed by the corn carrier 6 and the side guardrail 3 to form a three-dimensional protective space, controlling the corn transportation spillage rate to below 0.5%.

[0053] During the forklift handling of the storage unit, the lateral impact force generated by the bumps during transportation acts on the spring rod 20. The spring rod 20 bends and deforms to absorb the horizontal impact energy. At the same time, it drives the rubber sleeve 23 to slide along the rod and adapt to the shape of the corn, increasing the contact area to reduce local pressure. The elastic connecting rope 24 is stretched and stores energy when the rubber sleeve 23 slides, and releases the elastic restoring force after the impact disappears, so that the rubber sleeve 23 automatically returns to its initial position. At the same time, the stretching deformation of the elastic connecting rope 24 provides auxiliary buffering, which works in conjunction with the bending deformation of the spring rod 20 to absorb the lateral impact energy and prevent the fresh corn husk from directly hitting the rigid boundary.

[0054] When the storage unit is placed on the ground, the bottom stacking positioning post 12 is pushed back into the mounting groove 11 by the ground. The spring 13 is compressed and generates elastic restoring force, so that the stacking positioning post 12 is elastically pressed against the ground. The spring preload increases the positive pressure between the pallet 2 and the ground, thereby improving the bottom anti-slip performance and preventing the storage unit from slipping when the forklift stops suddenly.

[0055] When multiple storage units are stacked, the support base of the upper pallet 2 is placed on the top surface of the positioning rod 17 of the lower side guardrail 3, the stacking positioning post 12 is inserted into the second stacking positioning groove 19, and the spring 13 is still in a compressed state and provides elastic clamping force. At this time, the positioning rod 17 of the side guardrail 3 also serves as a transition support and positioning component between the upper and lower layers. The stacking load is not only transmitted through the column 4, but also distributed to the side guardrail 3 frame through the positioning rod 17, so that the maximum number of stacked layers can reach 5 layers and the total stacking load is ≥14.0 tons.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fresh corn storage device, characterized in that, The system includes a storage pallet, which comprises multi-layered stacked storage units. Each storage unit includes a pallet and detachable side rails that can be inserted into the four sides of the top of the pallet. The corners of two adjacent storage units can be connected in a composite positioning manner to form a three-dimensional protection system that couples vertical support with horizontal support. The three-dimensional protection system includes a vertical buffer structure and a horizontal buffer structure. The vertical buffer structure is located inside the pallet, and the horizontal buffer structure is located on the side rails.

2. The fresh corn storage device according to claim 1, characterized in that, The pallet includes four uprights at the four corners and a square frame beam that surrounds and connects adjacent uprights. The uprights and the frame beam form a square frame, and a corn support component is fixed inside the square frame. The cross-sectional dimensions and wall thickness of the uprights are calculated and determined based on the strength condition σ=F / S≤[σ], where σ is the actual stress of the component, F is the rated load borne by a single column, and S is the cross-sectional area of ​​the component under stress.

3. The fresh corn storage device according to claim 2, characterized in that, The side of the column is fixedly connected to the side of the frame beam, and a connector is fixedly provided at the connection. One side of the connector is fixed to the side of the column, and the other side is sleeved on the outer side of the end of the frame beam. The connector includes snap-fit ​​blocks fixed to both sides of the frame beam and the bottom surface of the frame beam. Each snap-fit ​​block is inserted into a snap-fit ​​groove. The snap-fit ​​groove is fixed to a U-shaped connecting plate, and the U-shaped connecting plate is fixed to the side of the column and sleeved on the side of the frame beam. A rubber layer is fixed on the inner wall of the snap-fit ​​groove. The snap-fit ​​block and the snap-fit ​​groove are interference-fitted.

4. The fresh corn storage device according to claim 3, characterized in that, The corn support component includes an upper corrugated support plate and a lower corrugated support plate, with their crests and troughs corresponding to each other and forming multiple buffer cavities. Each buffer cavity is embedded with an elastic buffer sphere. The maximum deflection δ of the upper corrugated support plate under rated load satisfies δ≤[δ], where δ is the actual deformation of the support plate. The maximum deflection δ of the upper corrugated support plate under rated load is less than the ultimate compression of the elastic buffer sphere.

5. The fresh corn storage device according to claim 4, characterized in that, The top surface of the column is fixed with a first stacking positioning groove, and the bottom surface is fixed with a support base. The support base is fixed with an installation groove, and the top of the installation groove is fixed with a spring. The bottom end of the spring is fixedly connected with a stacking positioning post. The stacking positioning post slides against the inner wall of the installation groove. The stacking positioning post can be elastically inserted into the first stacking positioning groove or the second stacking positioning groove on the top surface of the side guardrail, and the insertion point is provided with a rubber layer interference fit.

6. The fresh corn storage device according to claim 5, characterized in that, The spring stiffness K and rated compression ΔL satisfy the following: spring preload F_spring = K·ΔL, and when the palletizing positioning post is elastically pressed against the ground or inserted into the palletizing positioning slot, the spring is in a compressed state, and the static friction f between the pallet and the ground or adjacent pallets satisfies f = μ·N, where N = G + F_spring, where G is the total weight of the pallet and the corn it carries, μ is the coefficient of friction of the contact surface, and f ≥ F_inertia, where F_inertia is the maximum horizontal inertial force generated during the handling process.

7. The fresh corn storage device according to claim 6, characterized in that, The side railing includes four positioning rods at the four corners, and railing components connected adjacent to the positioning rods. The positioning rods and railing components form a square railing frame by encircling each other. The bottom end of each positioning rod is inserted into a railing mounting positioning groove fixed to the top surface of the column. The railing mounting positioning groove is fixed to the top surface of the column and fits on the outside of the first stacking positioning groove. The bottom edge of the positioning rod is chamfered. A rubber layer is fixed on the inner side of the railing mounting positioning groove. The positioning rod and the railing mounting positioning groove are interference fit.

8. The fresh corn storage device according to claim 7, characterized in that, The guardrail component includes multiple spring rods connected sequentially from top to bottom between two positioning rods. Each spring rod has a fixing rod fixedly connected to both ends. The fixing rod passes through the positioning hole on the positioning rod and is locked by a pin. Multiple rubber sleeves are sequentially fitted horizontally on each spring rod. Adjacent rubber sleeves are fixedly connected by an elastic connecting rope. The rubber sleeves can slide along the axial direction of the spring rod. The outer side of the rubber sleeve is provided with anti-slip texture, and the side wall is provided with an axial through-cut for radially opening and fitting onto the spring rod.

9. The fresh corn storage device according to claim 8, characterized in that, A second stacking positioning groove is fixed on the top surface of the positioning rod, and a rubber layer is fixed on the inner side of the second stacking positioning groove. The stacking positioning post can be inserted into the second stacking positioning groove and have an interference fit with it.

10. The fresh corn storage device according to claim 9, characterized in that, The entire surface of the column and tray is provided with a three-layer composite anti-rust layer consisting of a hot-dip galvanized layer, an epoxy resin layer, and a local anti-rust primer, wherein the thickness of the hot-dip galvanized layer is ≥60μm, the thickness of the epoxy resin layer is ≥20μm, and the thickness of the anti-rust primer is ≥10μm.

Images