Refrigerator car

Abstract

The invention provides a refrigerator car. A heat insulation carriage of the refrigerator car comprises an outer carriage body, a framework, connecting bolts and annular end plates. An opening is formed in one end of the outer carriage body, and a fastening mechanism is arranged on the inner circumferential wall of the outer carriage body. The framework is provided with bolt holes, and an inner skin is attached to the inner wall of the framework. One end of a main frame is connected with the inner side wall of the end, away from the opening, of the outer carriage body through an end support and a heat insulation bridge, the other end of the main frame is flush with the opening end of the outer carriage body, and a heat insulation cavity is formed between the framework and the outer carriage body and filled with heat insulation materials. The end plate covers the end, close to the opening, of the heat insulation cavity, and the connecting bolts penetrates through the second bolt holes and extend into the first bolt holes. The carriage is not provided with a fragile connecting mechanism, the overall structural strength is high, and cold leakage and water leakage are not likely to happen. The invention further provides a manufacturing method of the heat insulation carriage. A layered filling technology is adopted, construction is convenient, large holes can be effectively prevented from being generated, large clamps are not needed, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a refrigerated vehicle. Background technique [0002] In the manufacturing process of traditional refrigerated carriages, an integral support structure is usually used, skins are attached to the inner and outer sides of the support, and polyurethane foam is filled in the gap between the two layers of skins. This production process requires the use of large clamps to clamp the two layers of skin, otherwise the polyurethane foam will burst during the expansion process, and cavitation will easily occur between the polyurethane foam and the skin, resulting in problems such as cold leakage and weak bonding. . Moreover, the outer skin has low structural strength and cannot resist external impacts, and is prone to gaps or leaks, resulting in cold and water leakage, and generally has a relatively short service life. [0003] Another process is to use six "sandwich" composite materi...

AI Technical Summary

Problems solved by technology

However, in production engineering, due to the relatively large volume of the inner and outer boxes, it is difficult to accurately ensure the relative position between the inner and outer boxes, and the positioning is difficult

In addition, the gap between the inner and outer boxes is deep, and it is not easy to fully fill the gap with insulation materials, making the construction complicated

The actual production results show that the finished product manufactured by this process is still prone to cavitation, resulting in poor insulation effect, low connection strength between the inner and outer boxes, poor product quality control, and low yield

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