CN101497394B - Underframe structure of a refrigerated container - Google Patents

Abstract

The invention provides a chassis structure for a refrigerating container, which comprises two bottom side beams which are longitudinally arrayed, an auxiliary floor which is arranged between the two bottom side beams and a bottom beam which is arrayed transversely, wherein both ends of the bottom beam are connected with a left bottom side beam and a right bottom side beam respectively. The chassis structure of the refrigerating container is characterized in that the auxiliary floor is a flat plate; the chassis structure also comprises a plurality of reinforcing ribs which are arrayed transversely with a preset space and welded to the upper side of the auxiliary floor, and both ends of each reinforcing rib are connected with the left bottom side beam and the right bottom side beam respectively; and the bottom beam comprises a main bottom beam and two auxiliary bottom beams, wherein lower edges of the main bottom beam and the auxiliary bottom beams are parallel to that of the bottom side beams, and upper edges of the main bottom beam and the auxiliary bottom beams are higher than a plane formed by the auxiliary floor. The chassis structure reduces the damage probability of the auxiliary floor, improves the repairing efficiency, reduces the cost, can achieve the automatic welding and automatic painting, and improve the production efficiency and the product quality, so that the structure strength, the shock resistant capability and the capability of preventing foam from layering of a base plate are improved.

Description

Underframe structure of a refrigerated container

technical field

The invention relates to an assembly of a refrigerated container, in particular to an underframe structure of the refrigerated container.

Background technique

The underframe structure, foam layer and T floor of the refrigerated container together constitute the load-bearing structure of the goods in the refrigerated container. The underframe part of the refrigerated container is mainly composed of (i) two bottom side beams arranged longitudinally, (ii) a plurality of bottom beams arranged horizontally and (iii) an auxiliary floor; a T floor is set above the underframe part ; A closed space is formed between the T floor and the auxiliary floor, and this space is the foaming area. The sub-floor of the existing underframe is generally formed by overlapping or splicing (welding or bonding) multiple corrugated sub-floors to form a whole sub-floor. Bottom side beams and 2 to 3 bottom beams are welded together. As shown in Figure 1, which shows a partial schematic view of the longitudinal section of one side of the existing refrigerated container underframe structure, as can be seen from Figure 1, the upper edge 11 of the bottom side beam of the bottom side beam 1 and the lower edge 12 of the bottom side beam A corrugated auxiliary floor 2 is arranged between them, and several bottom beams 3 are arranged between the left and right bottom side beams, usually a main bottom beam 31 and two auxiliary bottom beams 32, the main bottom beam 31 and the auxiliary bottom A part of the beam 32 is located below the sub-floor 2 , and a part is located above the sub-floor 2 , that is, the upper part is located in the foaming area. The corrugated underframe structure of the existing refrigerated container has the following disadvantages: (1) the welding of the corrugated sub-floor and the bottom side beam is all manual welding, which has low welding efficiency and poor formability; It is difficult to paint on the sub-floor, and it is easy to cause a large difference in the thickness of the paint film at the crest and trough, resulting in serious waste; (3) The corrugated sub-floor will be damaged by the impact of trailer locks and stones on uneven ground, and the corrugated It is difficult to maintain the board; (4) The strength of the chassis mainly depends on the polyurethane foam for bearing, the impact resistance is poor, and the foam is easy to delaminate. Therefore, providing a new underframe structure of a refrigerated container that has high structural strength and is easy to process and manufacture is still an important problem to be solved urgently by those skilled in the art when developing and manufacturing a refrigerated container.

Contents of the invention

The problem to be solved by the present invention is to overcome the following disadvantages in the corrugated underframe structure of the existing refrigerated container: (1) The welding of the corrugated sub-floor and the bottom side beam is all manual welding, which has low welding efficiency and poor formability (2) It is difficult to carry out paint construction on the corrugated sub-floor, which is likely to cause large differences in paint film thickness at the peaks and troughs, and serious waste; (3) The corrugated sub-floor will be affected by trailer locks and stones on uneven ground. It is damaged due to collisions, and the corrugated board is difficult to maintain; (4) The strength of the chassis mainly depends on the polyurethane foam for bearing, and the impact resistance is poor, and the foam is easy to delaminate.

In order to solve the above problems, the present invention provides an underframe structure of a refrigerated container, which includes two longitudinally arranged bottom side beams, a sub-floor arranged between the two bottom side beams, and a horizontally arranged bottom beam, the bottom beam The two ends are respectively connected to the left and right bottom side beams, wherein: the sub-floor is a flat plate; the underframe structure also includes a number of reinforcing ribs arranged laterally at predetermined distances and welded to the upper side of the sub-floor, the reinforcing ribs The two ends of the two bottom beams are respectively connected to the left and right bottom side beams; the bottom beam includes a main bottom beam and two auxiliary bottom beams, and the lower edges of the main bottom beam and the auxiliary bottom beam are flush with the lower edge of the bottom side beam , the upper edges of the main bottom cross beam and the auxiliary bottom cross beam are higher than the plane formed by the auxiliary floor.

According to the underframe structure provided by another embodiment of the present invention, the sub-floor has shallow corrugations with a corrugation depth less than 10 mm.

According to the underframe structure provided by any of the above schemes of the present invention, it also includes several inner beams arranged laterally at predetermined distances, the two ends of the inner beams are respectively connected to the left and right bottom side beams, and the inner beams are located at above the sub-floor.

According to the chassis structure further provided by the present invention, wherein: the upper edge of the inner beam is flush with the upper edge of the bottom side beam.

According to the underframe structure further provided by the present invention, wherein: the inner beam is a steel material with a cross-sectional shape of a square frame, an I shape, a C shape, a T shape or a U shape.

According to the chassis structure further provided by the present invention, it further includes PE ribs arranged on the inner beams and used to support the T floor.

In the underframe structure of the refrigerated container of the present invention, the auxiliary floor and the T floor supported on the underframe form a foam layer, and the weight of the goods in the refrigerated container is mainly carried by the bottom beam, which greatly reduces the burden of the original corrugated board. Bearing capacity received. At the same time, through the above design of the present invention, the following technical effects can be effectively obtained: 1) The probability of damage to the sub-floor is minimized; 2) Simple flat plates can be used instead of corrugated plates for repairs, which greatly improves the repair efficiency , which reduces the cost; 3) It can realize automatic welding and automatic painting, improve production efficiency and product quality; 4) The structural strength, impact resistance and ability to prevent foam delamination of the bottom plate are greatly enhanced.

Description of drawings

Fig. 1 is a partial structural schematic view of the longitudinal section of the bottom frame of the existing refrigerated container.

Fig. 2 is a partial structural schematic diagram of a longitudinal section of the bottom frame of the refrigerated container of the present invention.

FIG. 3 is an enlarged structural schematic diagram of part A in FIG. 2 .

FIG. 4 is an enlarged structural schematic diagram of part B in FIG. 2 .

FIG. 5 is an enlarged structural schematic diagram of part C in FIG. 2 .

Fig. 6 is a schematic partial structural view of the bottom frame of the refrigerated container of the present invention.

Among them, the main drawings and symbols are explained as follows:

1. Bottom side beam 31. Main bottom beam

11. Upper edge of the bottom side beam 32. Auxiliary bottom beam

12. Lower edge of the bottom side beam 4. Reinforcing rib

2. Secondary floor 5. Inner beam

3. Bottom beam 6. PE reinforcement

Detailed ways

The present invention will be further described below through specific embodiments with reference to the accompanying drawings, the purpose of which is to facilitate the understanding of the present invention for illustration purposes and not to limit the present invention.

The idea of the present invention is to improve the structural strength of the underframe of the refrigerated container by improving the underframe structure of the refrigerated container, so that the underframe of the refrigerated container is easy to process and manufacture.

Embodiments of the present invention will now be described in detail with reference to the drawings. Fig. 2 is a partial structural schematic view of the longitudinal section of the bottom frame of the refrigerated container of the present invention. Fig. 3, Fig. 4 and Fig. 5 are respectively enlarged structural schematic diagrams of parts A, B and C in Fig. 2, and Fig. 6 is a refrigerated container of the present invention A schematic diagram of the partial structure of the bottom frame of the container.

In a specific embodiment of the underframe structure of the refrigerated container provided by the present invention, the underframe structure includes two longitudinally arranged bottom side beams 1, an auxiliary floor 2 arranged between the two bottom side beams, and a horizontally arranged bottom cross beam 3. Both ends of the bottom beam 3 are respectively connected to the left and right bottom side beams 1, wherein: the sub-floor 2 is a flat plate; Several reinforcing ribs 4, the two ends of the reinforcing ribs 4 are respectively connected with the left and right bottom side beams 1; the bottom beam 3 includes a main bottom beam 31 and two auxiliary bottom beams 32, the main bottom beam 31 and the lower edge of the auxiliary bottom beam 32 are flush with the lower edge 12 of the bottom side beam, and the upper edges of the main bottom beam 31 and the auxiliary bottom beam 32 are higher than the plane formed by the auxiliary floor 2 .

In the second specific embodiment of the underframe structure of the refrigerated container provided by the present invention, the sub-floor 2 is designed to have shallow corrugations with a corrugation depth less than 10 mm, which is beneficial to increase the structural strength of the sub-floor , At the same time, it will not adversely affect the painting and other processes.

According to the first specific embodiment of the present invention, it also includes a number of inner cross beams 5 arranged laterally at predetermined distances, the two ends of the inner cross beams 5 are respectively connected to the left and right bottom side beams 1, and the inner cross beams 5 are located in the sub- Above floor 2.

According to the second specific embodiment of the present invention, it also includes several inner beams 5 arranged horizontally at predetermined distances, the two ends of the inner beams 5 are respectively connected with the left and right bottom side beams 1, and the inner beams 5 are located in the auxiliary Above floor 2.

A further embodiment of the chassis structure of the present invention is designed so that the upper edge of the inner beam 5 is flush with the upper edge 11 of the bottom side beam.

A further embodiment of the underframe structure of the present invention is that the inner beam 5 is made of steel with a cross-sectional shape that is a square frame, I-type, C-shaped, T-shaped or U-shaped. This shape of steel plays an important role in strengthening the chassis structure.

A further embodiment of the underframe structure of the present invention further includes PE ribs 6 arranged on the inner beams and used to support the T floor.

In the present invention, an inner crossbeam 5 is welded at a predetermined distance between the two bottom side beams 1, and the number of the inner crossbeams 5 can be determined according to the structural design of the whole container, which is easily accomplished by those skilled in the art.

It can be seen from the figure that the lower bottom surfaces of the main bottom beam 31 and the auxiliary bottom beam 32 are flush with the lower edge 12 of the bottom side beam 1, and the lower edges of the main bottom beam 31 and the auxiliary bottom beam 32 are aligned with the lower edge 12 of the bottom side beam. Evenly, the upper edges of the main bottom beam 31 and the auxiliary bottom beam 32 are higher than the plane formed by the auxiliary floor 2, that is, their upper edges are arranged in the foaming area. And the whole of the inner beam 5 is located above the sub-floor 2, that is, the inner beam 5 is entirely arranged in the foaming area.

Above the main bottom cross beam 31, the auxiliary bottom cross beam 32, and the inner cross beam 5, there are PE ribs 6 for supporting the T floor of the refrigerated container (not shown in the figure). The weight of the goods is mainly concentrated on the main bottom beam 31, the auxiliary bottom beam 32 and the inner beam 5, and the gravity transmitted to the auxiliary floor 2 through the foam layer (not shown in the figure) is greatly reduced, so that the auxiliary floor can be extended. Floor 2 and the service life of the foam layer.

In addition, it can be seen from FIG. 2 that the sub-floor 2 is basically a flat plate. In a preferred embodiment, a shallow corrugated plate with a corrugation depth of less than 10mm is used as the sub-floor 2. This design scheme can greatly improve the processing convenience of the sub-floor 2.

In addition, a number of reinforcement ribs 4 are welded every predetermined distance on the upper side of the auxiliary floor 2. The number of reinforcement ribs 4 can be determined according to the structural design of the overall container, which is easily done by those skilled in the art; reinforcement ribs 4 It is arranged in the foaming area, and the two ends are welded to the bottom side beam 1, thereby greatly enhancing the structural strength of the auxiliary floor 2. This sub-floor 2 can adopt the structure commonly used in this field, preferably adopt the steel plate that section is substantially " U " shape.

The underframe structure of the refrigerated container of the present invention is mainly composed of two longitudinal bottom side beams 1, a main bottom beam 31, two auxiliary bottom beams 32 and several inner beams 5, the main bottom beam 31, the auxiliary bottom beam 32, and The two ends of the inner beam are respectively welded on the bottom side beam 1 to form a complete rigid frame structure. Compared with the existing corrugated sub-floor 2 underframe structure, the main difference is that the sub-floor used in the underframe of the present invention 2 is basically a flat plate, and several reinforcing ribs 4 are welded on the auxiliary floor 2, and a number of inner beams 5 and PE ribs 6 on them are added, so that the foaming layer can be reduced under the premise of ensuring that the chassis passes the ISO test Excellent foam density to reduce heat leakage rate.

Using flat sub-floor instead of corrugated sub-floor can not only reduce the damage of sub-floor to the greatest extent, but also allow simple flat board instead of corrugated board to be repaired, which improves repair efficiency and reduces cost. The small bottom beams and PE ribs make the floor strength change from mainly relying on polyurethane foam to mainly rely on bottom beams, which enhances the structural strength of the bottom and improves the ability to resist impact and prevent foam delamination.

The bottom frame structure of the refrigerated container of the present invention, the T floor located in the box and the foam layer in the middle constitute the bottom plate of the refrigerated container. The present invention has been tested and tested to prove that it can fully meet the requirements of ISO-1496/2 on the rigidity and rigidity of the bottom plate of the refrigerated container. Strength requirements and heat leakage requirements.

Through the detailed description of the specific embodiments above, it is hoped that the present invention can be described more clearly, but the preferred specific embodiments disclosed above are not used to limit the present invention. The claims of the present invention should be interpreted in the broadest way based on the above description so as to cover all possible changes and arrangements having equivalents.

Claims (6)

1. An underframe structure of a refrigerated container, which comprises two longitudinally arranged bottom side beams, an auxiliary floor arranged between the two bottom side beams and a horizontally arranged bottom crossbeam, the two ends of the bottom crossbeam are connected to the left and right sides respectively. Bottom side beam connection, characterized in that: the sub-floor is a flat plate; the underframe structure also includes a number of reinforcing ribs arranged laterally at predetermined distances and welded to the upper side of the sub-floor, and the two ends of the reinforcing ribs are respectively It is connected with the left and right bottom side beams; the bottom beam includes a main bottom beam and two auxiliary bottom beams, the lower edges of the main bottom beam and the auxiliary bottom beams are flush with the bottom side beams, and the main The upper edges of the bottom beam and the auxiliary bottom beam are higher than the plane formed by the auxiliary floor. 2. The underframe structure according to claim 1, characterized in that the sub-floor has shallow corrugations with a corrugation depth less than 10 mm. 3. The underframe structure according to claim 1 or 2, characterized in that: it also includes a number of inner beams arranged horizontally at predetermined distances, the two ends of the inner beams are respectively connected to the left and right bottom side beams, and the inner beams The beams are located above the sub-floor. 4. The chassis structure according to claim 3, characterized in that: the upper edge of the inner beam is flush with the upper edge of the bottom side beam. 5. The underframe structure according to claim 4, characterized in that: said inner beam is a steel material with a cross-sectional shape of a square frame, an I shape, a C shape, a T shape or a U shape. 6. The underframe structure according to claim 3, characterized in that it further comprises PE ribs arranged on the inner beams and used to support the T floor.

Images