Floor member, floor structure and refrigerated container

Abstract

The application discloses a floor component, a floor structure and a refrigerated container. The floor component combines a T-shaped stud with a first fortress-shaped body and a second fortress-shaped body. The T-shaped stud is uniformly arranged along a horizontal plate, and ensures that a continuous longitudinal air supply channel is formed between adjacent studs. The fortress-shaped structure serves as a rigid support at both ends of the horizontal plate, and makes up for the deficiency of the T-shaped stud in resisting torsion and bending by itself. Under the premise of meeting the floor ventilation volume, the floor stress condition is improved, the cracking rate of a welding bead is reduced, and the working life of the welding bead is prolonged.

Description

Technical Field

[0001] This application relates to the field of container technology, and in particular to a floor component, floor structure and refrigerated container. Background Technology

[0002] In the cold chain logistics sector, refrigerated containers serve as the core transport carrier for perishable and preservative-requiring goods such as fruits and vegetables. The uniformity of temperature and humidity within the container and the reliability of its structural load-bearing capacity directly determine the quality of transported goods. To achieve long-term preservation of goods, modern refrigerated containers generally adopt a bottom-outlet, top-return air circulation mode. This mode distributes cold air evenly throughout the container via bottom air supply channels. The static pressure difference between the upper and lower parts of the cargo drives the cold air to penetrate the cargo stack, and finally returns to the refrigeration unit through the top return air space to complete the circulation. This effectively avoids spoilage caused by localized temperature imbalances.

[0003] In refrigerated containers, the floor structure not only bears the weight of the cargo but also serves as a crucial component of the cold air circulation system. Its structural design directly impacts ventilation efficiency and temperature control accuracy. Currently, the industry mainstream uses T-shaped floors as the core floor component. Their unique T-shaped cross-section structure creates a continuous longitudinal airflow channel at the bottom of the container. Cold air, output from the refrigeration unit, travels along this channel to the rear of the container and then permeates upwards into the gaps between the cargo. Thanks to its excellent ventilation characteristics, it provides a stable low-temperature preservation environment for perishable goods. However, in long-term practical application, the structural reliability of T-shaped floors has gradually revealed its shortcomings, especially under high-frequency forklift loading and unloading operations and long-term heavy-load service scenarios, where weld cracking has become a common and prominent problem. T-shaped flooring is typically connected to the container frame or adjacent floor components via welding. As a critical connection point, the weld bead experiences extremely complex stress conditions: on the one hand, the intense thermal expansion and contraction during welding generates residual stress, while the rigid structural design of the T-shaped flooring creates a strong restraint effect, causing the weld bead area to become a stress concentration zone; on the other hand, when forklifts load and unload goods, the impact load of the forks on the floor and the concentrated weight of the goods subject the weld bead to instantaneous shear and bending forces, which can easily lead to fatigue damage under long-term cyclic action.

[0004] Weld cracks not only severely damage the structural integrity of the T-shaped floor, but also trigger a chain of functional failures: cracked welds reduce the support rigidity of the T-shaped floor, making it prone to local deformation or even collapse, directly threatening loading, unloading, and transportation safety; at the same time, deformed floors can compress or block air supply channels, disrupting the uniformity of cold air circulation, causing temperature gradients inside the box, and resulting in localized spoilage of fruits and other goods; in addition, repairs after weld cracking require interruption of transportation operations, and multiple welding repairs will further weaken the floor's structural strength, significantly increasing maintenance costs and downtime losses.

[0005] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this application is to provide a floor component, floor structure and refrigerated container, which aims to solve the technical problems of low structural reliability and weld cracking in the floor structure of refrigerated containers during operation.

[0007] To achieve the above objectives, this application adopts the following technical solution: A floor component includes a horizontal board, a plurality of T-shaped vertical ribs extending upward on the upper surface of the horizontal board to form a first fort-shaped body connecting one end of the horizontal board, an overlapping portion disposed on the outer surface of the first fort-shaped body, a second fort-shaped body connecting the other end of the horizontal board, and a supporting portion disposed on the outer surface of the second fort-shaped body, wherein the T-shaped vertical ribs are located between the first fort-shaped body and the second fort-shaped body.

[0008] As a further improvement to the above technical solution, the first fort-shaped body includes a first inclined wall and a second inclined wall arranged symmetrically, and a first top platform connecting the first inclined wall and the second inclined wall. The bottom end of the first inclined wall is connected to a horizontal plate, and the bottom end of the second inclined wall is suspended and its outer side is connected to the suspended overlapping part.

[0009] As a further improvement to the above technical solution, the overlapping part includes a transverse wall, an outer overlapping foot connected to the outer end of the transverse wall, and a first welded wall extending upward and disposed at the connection between the transverse wall and the outer overlapping foot; the bottom end of the second inclined vertical wall is bent inward to form an inner overlapping foot.

[0010] As a further improvement to the above technical solution, the connection between the first inclined wall and the second inclined wall and the first top platform is thickened to form an upward first protrusion.

[0011] As a further improvement to the above technical solution, the second fort-shaped body includes a third inclined wall and a fourth inclined wall arranged symmetrically, and a second top platform connecting the third inclined wall and the fourth inclined wall. The bottom end of the third inclined wall is connected to a horizontal plate, and the bottom end of the fourth inclined wall is connected to a support portion.

[0012] As a further improvement to the above technical solution, the support portion includes a transition step formed by bending outward from the bottom end of the fourth inclined vertical wall, a second welded wall provided at the outer end of the transition step and extending upward, and a bent support plate provided at the bottom of the transition step, wherein the bottom surface of the bent support plate is flush with the bottom surface of the horizontal plane.

[0013] As a further improvement to the above technical solution, the connection between the third and fourth inclined walls and the second top platform is thickened to form an upward second protrusion.

[0014] As a further improvement to the above technical solution, the T-shaped vertical rib includes a vertical wall connected to the horizontal plate and a horizontal extension arm located at the top of the vertical wall.

[0015] This application also provides a floor structure, which includes a main floor, a secondary floor, floor support beams, and an insulation layer, wherein the main floor includes at least two of the aforementioned floor components.

[0016] This application also provides a refrigerated container, which includes the aforementioned floor structure.

[0017] Beneficial effects: Compared with the prior art, the floor component provided in this application combines T-shaped vertical ribs with a first and a second fortified structure: the T-shaped vertical ribs are evenly distributed along the horizontal plate to ensure that a continuous longitudinal air supply channel is formed between adjacent vertical ribs; the fortified structure serves as a rigid support at both ends of the horizontal plate, making up for the inadequacy of the T-shaped vertical ribs in resisting torsion and bending on their own, improving the stress on the floor while meeting the floor ventilation requirements, reducing the cracking rate of the weld, and increasing the service life of the weld.

[0018] The floor structure provided in this application includes a main floor, a secondary floor, floor support beams, and an insulation layer. The main floor includes floor components and possesses all the advantages of floor components.

[0019] The refrigerated container provided in this application includes a floor structure and has all the advantages of floor structures and floor components. Attached Figure Description

[0020] Figure 1 A structural schematic diagram of the floor component provided in this application.

[0021] Figure 2 A schematic diagram of welding two floor components.

[0022] Figure 3 A schematic diagram of the floor structure provided in this application.

[0023] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle.

[0024] Figure 5 for Figure 3 A magnified view of a portion of region B in the middle.

[0025] Figure 6 for Figure 3 A magnified view of a portion of region C.

[0026] Figure 7 for Figure 3 A magnified view of a portion of region D.

[0027] Figure 8 This is a schematic diagram of the insulation layer and the main body.

[0028] Explanation of main component symbols: 1-Horizontal plate, 3-First fortress shape, 31-First inclined vertical wall, 32-Second inclined vertical wall, 33-First top platform, 34-First protrusion, 4-Overlapping part, 41-Transverse wall, 42-Outer lap, 43-First welded wall, 44-Inner lap, 5-Second fortress shape, 51-Third inclined vertical wall, 52-Fourth inclined vertical wall, 53-Second top platform, 54-Second protrusion, 6-Supporting part, 61-Transition step, 62-Second welded wall, 63-Bent support plate, 7-T-shaped vertical rib, 71-Vertical wall, 72-Horizontal extension arm, 21-Main floor, 22-Secondary floor, 81-Left floor component, 82-Right floor component, 83-Middle floor component, 84-Left end floor component, 85-Right end floor component, 9-Insulation layer. Detailed Implementation

[0029] This application provides a floor component, a floor structure, and a refrigerated container. To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following detailed description is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.

[0030] In the description of this application, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this application. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0031] Insulated containers equipped with refrigeration systems constitute refrigerated containers, which are insulated containers capable of maintaining goods at a specific temperature during transportation. Refrigerated containers can be used for both ocean (sea transport) and land (land transport).

[0032] Refrigerated containers have a rectangular structure and include a door at the rear, a front frame, top, side panels, and a base frame. The door is located within the rear door frame. A floor structure is laid on the base frame. A fully electrically driven refrigeration unit is installed at the front (front frame) inside the container to create circulating airflow within the container.

[0033] See Figure 3 and Figure 8 As shown, the floor structure includes a main floor 21, a secondary floor 22, floor support beams, and an insulation layer 9. The main floor 21 and secondary floor 22 are spaced apart along the height of the container. The floor support beams and insulation layer 9 are both located within the gaps between the main floor 21 and secondary floor 22. The floor support beams can be rod-shaped structures. Multiple floor support beams are spaced apart along the length of the container. In the width direction of the container, the floor support beams extend from one end of the floor to the other. In the height direction of the container, one end of the floor support beam connects to the secondary floor 22, and the other end connects to the main floor 21 to enhance the structural strength of the floor.

[0034] The insulation layer 9 can be made of rigid polyurethane foam. It can fill the gaps between the main floor 21, the secondary floor 22, and the floor support beams, forming a flexible support pad. This provides both thermal insulation and cushioning against forklift loading and unloading impacts, reducing damage to the main floor. This effectively reduces the transfer of temperature from inside the container to the outside. Alternatively, the insulation layer 9 can be manufactured by adding environmentally friendly chemical foaming agents such as pentafluoropropane and cyclopentane to polyurethane, polystyrene, or other base materials.

[0035] The main floor 21 may include at least two floor components. The main floor 21 may be formed by at least two floor components arranged side by side along the width direction of the container.

[0036] See Figure 1 As shown, each floor component includes a horizontal plate 1, a plurality of T-shaped vertical ribs 7 extending upward from the upper surface of the horizontal plate 1 to form a T-shape, a first fork-shaped body 3 connecting one end of the horizontal plate 1, an overlapping portion 4 disposed on the outer side of the first fork-shaped body 3, a second fork-shaped body 5 connecting the other end of the horizontal plate 1, and a support portion 6 disposed on the outer side of the second fork-shaped body 5. The horizontal plate 1 is located at the bottom of the floor component. Along the length of the container, the floor component extends from the front end to the rear end of the container's underframe.

[0037] During assembly, see Figure 2 As shown, the overlapping part 4 on the outside of the first fork-shaped body 3 of two adjacent floor components is matched with the supporting part 6 on the outside of the second fork-shaped body 5 of another floor component. That is, the overlapping part 4 is placed on the bearing surface of the supporting part 6 to form a stable pre-fixed structure. Then, the contact area between the overlapping part 4 and the supporting part 6 is welded and fixed by welding process to form a weld bead, so that multiple floor components are connected into one piece to form a complete main floor 21 covering the bottom of the container.

[0038] Understandably, when adjacent components are spliced, the overlapping part 4 is placed on the supporting part 6 to form a stable pre-fixed structure. This fitting method allows the two components to achieve surface contact positioning before welding. No additional clamping force is required during the welding process. The surface contact welding of the overlapping part 4 and the supporting part 6 makes the weld bead evenly distributed across the entire mating surface (rather than the localized concentrated stress of traditional spot welding or wire welding), reducing the stress borne per unit area of ​​the weld bead and avoiding cracking caused by local stress exceeding the material yield strength.

[0039] The weight of the cargo is borne by the T-shaped vertical rib 7, the first fortified body 3, and the second fortified body 5. The T-shaped vertical rib 7 is evenly distributed along the horizontal plate 1, distributing the load to the horizontal plate 1 and the main body of the fortified body, rather than concentrating it on the welded joints on the outside of the fortified body.

[0040] The impact load during forklift loading and unloading (such as the forks squeezing the floor) acts directly on the horizontal plate 1 and the T-shaped vertical rib 7, and is transmitted to the main body of the fork-shaped body through the T-shaped vertical rib 7. The welded joint at the connection between the overlapping part 4 and the supporting part 6 only bears the splicing and fixing force of the adjacent floor components, and does not directly bear the external load, thus realizing the isolation of the weld and the core load.

[0041] During the welding process, the residual stress generated by the welding of the lap joint 4 and the support joint 6 will be transmitted and diffused to the horizontal plate 1 and the T-shaped vertical rib 7 through the first fork-shaped body 3 and the second fork-shaped body 5, rather than being concentrated in the weld area. When the ground plate is subjected to longitudinal or transverse deformation (such as the horizontal plate 1 deflecting due to the heavy pressure of the goods), the fork-shaped body can offset part of the deformation force through its own rigidity, avoiding the deformation force from directly pulling the weld and reducing the additional stress caused by structural deformation of the weld.

[0042] In addition, the rod-shaped support beams are arranged along the width of the container and at intervals along the length. The two ends are connected to the lower surface of the main floor 21 and the upper surface of the sub-floor 22, respectively. This transfers the vertical load (cargo weight, impact) borne by the main floor 21 to the sub-floor 22, reducing the stress deformation of the main floor 21 itself, and thus reducing the shear force generated by the deformation and pulling of the weld at the splice of the main floor 21.

[0043] See Figure 8 As shown, the insulation foam material inside the first fortified body 3 and the second fortified body 5 not only enhances the insulation, but also forms an internal support structure by filling the first fortified body 3 and the second fortified body 5 with the insulation foam material: on the one hand, it enhances the deformation resistance of the fortified body, and the insulation foam material can buffer part of the impact load, indirectly protect the welding area of ​​the overlapping part 4 and the supporting part 6, reduce the weld cracking rate, and reduce the maintenance cost and loss of downtime for repair welding. On the other hand, through the adhesion between the upper surface of the insulation layer and the lower surface of the horizontal plate 1, it assists in supporting the horizontal plate 1, counteracts the pull of the horizontal plate 1 downward on the fortified body, and indirectly reduces the bending stress borne by the weld.

[0044] In other words, while traditional single T-shaped floors can form ventilation channels through vertical ribs, their resistance to torsion and bending is weak; while single fortified floors have strong structural rigidity, their excessive sealing can affect ventilation. The floor component provided in this application combines T-shaped vertical ribs 7 with the first fortified body 3 and the second fortified body 5: the T-shaped vertical ribs 7 are evenly distributed along the horizontal plate 1 to ensure that a continuous longitudinal air supply channel is formed between adjacent vertical ribs (meeting the ventilation requirements of refrigerated containers); the fortified structure serves as a rigid support at both ends of the horizontal plate 1, compensating for the lack of torsion and bending resistance of the T-shaped vertical ribs 7 on their own, improving the stress on the floor while meeting the floor ventilation requirements, reducing the weld cracking rate, and increasing the service life of the weld.

[0045] The T-shaped uprights 7 have a T-shaped cross-section in the width direction of the container (the cross-section is perpendicular to the length direction of the container). Each T-shaped upright includes a vertical wall 71 connected to the horizontal plate 1 and a horizontal extension arm 72 located at the top of the vertical wall 71. The horizontal extension arm 72 is used to support cargo. Each T-shaped floor has multiple T-shaped uprights 7 spaced apart along the width direction of the container.

[0046] For details, see Figure 1 As shown, the first fortified body 3 includes a first inclined wall 31 and a second inclined wall 32 symmetrically arranged, and a first top platform 33 connecting the first inclined wall 31 and the second inclined wall 32. The bottom end of the first inclined wall 31 is connected to the horizontal plate 1, and the bottom end of the second inclined wall 32 is suspended and its outer side is connected to the suspended overlapping part 4. During assembly, the suspended overlapping part 4 can be directly pressed onto the support part 6 of another floor component, the second fortified body 5. In other words, the symmetrical inclined walls of the first fortified body 3 form a trapezoidal cross-section rigid frame. The first inclined wall 31 and the second inclined wall 32 are the two waists of the trapezoid, and the first top platform 33 is the upper base of the trapezoid. Compared with the straight cross-section of the traditional T-shaped rib 7, the bending moment of inertia of this trapezoidal cross-section is increased: when the floor is subjected to heavy loads of goods or bending loads of forklift forks, the symmetrical inclined walls can offset the bending moment through their own high bending stiffness, avoiding waist-shaped depressions in the first fortified body 3 and ensuring the integrity of the floor end support structure.

[0047] Further details can be found here. Figure 1As shown, the overlapping portion 4 includes a transverse wall 41, an outer overlapping leg 42 connected to the outer end of the transverse wall 41, and a first welded wall 43 extending upwards and disposed at the connection between the transverse wall 41 and the outer overlapping leg 42; the bottom end of the second inclined vertical wall 32 is bent inward to form an inner overlapping leg 44. The outer overlapping leg 42 of the overlapping portion 4 is directly connected to the outer end of the transverse wall 41, forming a horizontally extending load-bearing end. During assembly, the outer overlapping leg 42 can completely fit against the upper surface of the other component support portion 6, and its own weight can form a stable support after overlapping. The complementary support structure of the inner overlapping leg 44 and the outer overlapping leg 42 increases the contact area with the support portion 6, thereby enhancing the bending rigidity of the bottom end of the second inclined vertical wall 32, so that the second inclined vertical wall 32 and the overlapping portion 4 always maintain a vertical posture during overlapping, ensuring that the subsequent welding surfaces are completely fitted, and solving the technical problem of weld gaps caused by the tilting of the floor components after traditional overlapping.

[0048] The first welding wall 43 extends upward from the connection between the transverse wall 41 and the outer foot 42, forming an independent welding facade perpendicular to the floor surface. The vertical facade has a regular structure (no complex curved surfaces or obstructions) and can be directly adapted to robotic automated welding equipment. The automated welding torch can form a standardized welding path along the outer side and top of the first welding wall 43, avoiding problems such as uneven weld thickness and poor forming caused by differences in operating techniques in manual welding.

[0049] The junction of the first inclined wall 31, the second inclined wall 32, and the first top platform 33 is a triangular stress concentration area of ​​the fortress-shaped structure. Therefore, the junction of the first and second inclined walls with the first top platform 33 is thickened to form an upward first protrusion 34. The upwardly thickened first protrusion 34 strengthens the cross-section. When the fortress-shaped structure is subjected to vertical loads (such as heavy pressure on the edge of goods) or lateral forces (such as forklift side pushes), the first protrusion 34 can directly absorb and disperse bending stress, avoiding cracking at the junction caused by stress concentration.

[0050] For details, see Figure 1 As shown, the second fork-shaped body 5 includes a symmetrically arranged third inclined wall 51 and a fourth inclined wall 52, and a second top platform 53 connecting the third inclined wall 51 and the fourth inclined wall 52. The bottom end of the third inclined wall 51 is connected to the horizontal plate 1, and the bottom end of the fourth inclined wall 52 is connected to the support part 6. The third inclined wall 51 and the fourth inclined wall 52 are symmetrically distributed and together with the second top platform 53, they form an isosceles trapezoidal rigid frame: when a forklift loads or unloads, a lateral impact force is generated, and the symmetrical inclined walls can prevent the horizontal displacement of the support part 6 through the reverse constraint force; at the same time, the frame can effectively offset the torsional force caused by the uneven loading of the goods, and prevent the overlapping part 4 from slipping due to the twisting deformation of the support part 6, which is suitable for the high-frequency and high-intensity loading and unloading scenarios of refrigerated containers.

[0051] Further details can be found here. Figure 1As shown, the support portion 6 includes a transition step 61 formed by bending outward from the bottom end of the fourth inclined vertical wall 52, a second welded wall 62 located at the outer end of the transition step 61 and extending upward, and a bent support plate 63 located at the bottom of the transition step 61. The bottom surface of the bent support plate 63 is flush with the bottom surface of the horizontal plane. The outer overlapping leg 42 and the inner overlapping leg 44 press simultaneously on the bent support plate 63 to form a double-point bearing structure: compared with the traditional single-point pressing of only the outer overlapping leg 42, the double overlapping leg increases the contact area between the overlap portion 4 and the bent support plate 63, and the contact pressure is evenly distributed after overlapping, completely eliminating lateral displacement and longitudinal loosening during overlapping, and adapting to the high-frequency impact scenario of refrigerated container forklifts.

[0052] It should be emphasized that after the outer lap leg 42 and the inner lap leg 44 press and bend the support plate 63, a rigid and fixed welding reference surface can be formed: on the one hand, the double lap legs restrict the thermal deformation of the lap part 4 during the welding process, effectively control the amount of deformation of the welding surface, and avoid the weld bead being incomplete due to the excessive gap between the second welding wall 62 and the first welding wall 43; on the other hand, the stable pressing state allows the automatic welding gun to accurately weld along the contact edge between the double lap legs and the bending support plate 63.

[0053] After the first welded wall 43 and the second welded wall 62 are joined, when the welding torch is applied vertically from the top, the molten pool metal can completely fill the joining surface, avoiding incomplete filling of the molten pool due to excessive gaps. At the same time, the top welding can cover the top fusion line of the vertical weld, eliminating the defect of incomplete welding that is prone to occur at the top of the vertical weld. In other words, after the first welded wall 43 and the second welded wall 62 are joined and welded, they form a frame-shaped closed-loop structure. On the one hand, the top weld can evenly distribute the vertical load (such as heavy load of goods, forklift drop impact) to the entire area of ​​the two walls. At the same time, the top weld and the two walls can convert the lateral thrust into the overall force of the frame structure, avoiding stress concentration at the bottom joining point of the two walls, and further extending the fatigue life of the weld. On the other hand, the sealing weld formed by the top welding can completely seal the gap, and together with the lateral sealing of the vertical weld and the horizontal sealing of the double feet, improve the waterproof performance of the floor structure.

[0054] The junction of the third inclined wall 51, the fourth inclined wall 52, and the second top platform 53 is a triangular stress concentration area of ​​the fortress-shaped structure. The junction of these junctions with the second top platform 53 is thickened to form an upward-facing second protrusion 54. This upwardly thickened second protrusion 54 is reinforced through cross-section. When the fortress-shaped structure is subjected to vertical loads (such as heavy pressure on the edge of goods) or lateral forces (such as forklift side pushes), the second protrusion 54 can directly absorb and disperse bending stress, preventing cracking at the junction due to stress concentration.

[0055] In this embodiment, see Figures 3 to 7As shown, the main floor 21 includes a plurality of left floor components 81, a central floor component 83, a plurality of right floor components 82, a left end floor component 84, and a right end floor component 85.

[0056] The difference between the left floor component 81 and the right floor component 82 lies in the different positions of the overlapping portion 4 and the supporting portion 6. The left floor component 81 includes a horizontal plate 1, three T-shaped vertical ribs 7 extending upward from the upper surface of the horizontal plate 1 to form a T-shape, a first fortified body 3 connecting the right end of the horizontal plate 1, an overlapping portion 4 located on the right side of the first fortified body 3, a second fortified body 5 connecting the left end of the horizontal plate 1, and a supporting portion 6 located on the left side of the second fortified body 5. The right floor component 82 includes a horizontal plate 1, three T-shaped vertical ribs 7 extending upward from the upper surface of the horizontal plate 1 to form a T-shape, a first fortified body 3 connecting the left end of the horizontal plate 1, an overlapping portion 4 located on the left side of the first fortified body 3, a second fortified body 5 connecting the right end of the horizontal plate 1, and a supporting portion 6 located on the right side of the second fortified body 5.

[0057] The central floor component 83 includes a horizontal plate 1, two T-shaped vertical ribs 7 set on the horizontal plate 1, two fort-shaped bodies respectively set at both ends of the horizontal plate 1, and supporting parts 6 respectively set on the outside of the two fort-shaped bodies.

[0058] Preferably, the left-end floor component 84 includes a horizontal plate 1, a single T-shaped vertical rib 7 disposed on the horizontal plate 1, a flat support portion disposed on the left end of the horizontal plate 1, and an overlapping portion 4 disposed on the right end of the horizontal plate 1. The right-end floor component 85 includes a horizontal plate 1, a single T-shaped vertical rib 7 disposed on the horizontal plate 1, a flat support portion disposed on the right end of the horizontal plate 1, and an overlapping portion 4 disposed on the left end of the horizontal plate 1.

[0059] Two adjacent left floor components 81 are welded together. The support portion 6 of the leftmost left floor component 81 is welded to the overlap portion 4 of the left end floor component 84. The overlap portion 4 of the rightmost left floor component 81 is welded to the support portion 6 on the left side of the middle floor component 83. Two adjacent right floor components 82 are welded together. The support portion 6 of the rightmost right floor component 82 is welded to the overlap portion 4 of the right end floor component 85. The overlap portion 4 of the leftmost right floor component 82 is welded to the support portion 6 on the right side of the middle floor component 83.

[0060] The layout of the main floor 21 allows the left-end floor component 84 and the right-end bottom plate component to fit into the narrow spaces on both sides of the refrigerated container, with the flat support directly connected to the side walls of the refrigerated container. Multiple left-end floor components 81 and right-end floor components 82 cover the wide central core area, meeting the heavy-load requirements of a full stack of palletized goods; the central floor component 83 connects the left and right core areas, avoiding structural breaks from direct splicing. The overall layout ensures that the main floor 21 seamlessly adapts to the side walls and internal load-bearing requirements of the refrigerated container, with no functional blind spots.

[0061] It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of this application, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A floor component, characterized in that, It includes a horizontal plate, several T-shaped vertical ribs extending upward on the upper surface of the horizontal plate to form a first fort-shaped body connecting one end of the horizontal plate, an overlapping part provided on the outer surface of the first fort-shaped body, a second fort-shaped body connecting the other end of the horizontal plate, and a supporting part provided on the outer surface of the second fort-shaped body, with the T-shaped vertical ribs located between the first fort-shaped body and the second fort-shaped body.

2. The floor component according to claim 1, characterized in that, The first fort-shaped structure includes a first inclined wall and a second inclined wall arranged symmetrically, and a first top platform connecting the first inclined wall and the second inclined wall. The bottom end of the first inclined wall is connected to a horizontal plate, and the bottom end of the second inclined wall is suspended and its outer surface is connected to the suspended overlapping part.

3. The floor component according to claim 2, characterized in that, The overlapping portion includes a transverse wall, an outer lap foot connected to the outer end of the transverse wall, and a first welded wall extending upward and disposed at the connection between the transverse wall and the outer lap foot; the bottom end of the second inclined vertical wall is bent inward to form an inner lap foot.

4. The floor component according to claim 2, characterized in that, The connection between the first and second inclined walls and the first top platform is thickened to form an upward first protrusion.

5. The floor component according to claim 1, characterized in that, The second fort-shaped structure includes a third and a fourth inclined wall arranged symmetrically, and a second top platform connecting the third and fourth inclined walls. The bottom end of the third inclined wall is connected to a horizontal plate, and the bottom end of the fourth inclined wall is connected to a support portion.

6. The floor component according to claim 5, characterized in that, The support portion includes a transition step formed by bending outward from the bottom end of the fourth inclined vertical wall, a second welded wall provided at the outer end of the transition step and extending upward, and a bent support plate provided at the bottom of the transition step, the bottom surface of the bent support plate being flush with the bottom surface of the horizontal plane.

7. The floor component according to claim 5, characterized in that, The connection between the third and fourth inclined walls and the second top platform is thickened to form an upward second protrusion.

8. The floor component according to claim 1, characterized in that, The T-shaped vertical rib includes a vertical wall connected to the horizontal plate and a horizontal extension arm located at the top of the vertical wall.

9. A floor structure, characterized in that, It includes a main floor, a secondary floor, floor support beams, and an insulation layer, wherein the main floor includes at least two floor components as described in any one of claims 1-8.

10. A refrigerated container, characterized in that, Includes the floor structure as described in claim 9.

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