How to tailor-made the construction of cold storage

How to tailor-made the construction of cold storage

The introduction and application of foreign advanced refrigeration technology and new thermal insulation materials have made a great breakthrough in the construction of cold storage in China. During the investment and construction of cold storage, the initial investment cost and operating cost in use should be considered comprehensively according to different regions and conditions, and a more economical and reasonable cold storage should be constructed. At present, there are mainly three types of construction methods for cold storage buildings: one is a civil cold storage built with blocks and reinforced concrete structures and thermal insulation; the other is a light steel structure plus an assembled cold storage; the third is a civil and steel concrete structure plus an assembled cold storage. . Which form of cold storage to choose depends on factors such as different regions, geographical environment, investment costs, and operating costs.

　　Civil structure: mainstream construction type, technology advances with the times

　　 civil cold storage is divided into single-story and multi-story, single-story cold storage mostly adopts beam-slab structure, and multi-story cold storage adopts beamless floor structure. The walls, columns, and floor slabs of the cold storage adopt block and reinforced concrete structures. The inner side of the cold storage wall is pasted with an insulation layer. The two sides of the insulation layer need to be moisture-proof and vapor-proof layers, and the inner side is also a civil protection layer. Insulation materials for cold storage are developed from rice husk, cork, and polystyrene to polyurethane spraying. Moisture-proof and vapor-proof materials have eliminated the practice of petroleum asphalt linoleum, and switched to the practice of on-site paving with polyurethane waterproof coating and polyethylene film. The enclosure structure of a civil cold storage is a heavy-duty structure with greater thermal inertia, less temperature fluctuations caused by outside air temperature and solar radiation, and a relatively stable storage temperature.

The advantages of civil cold storage are energy saving, sturdy, high load-bearing, good fire resistance and durability; the disadvantage is that the construction period is longer, the weight is heavier, the geological conditions are high, and the cold storage has more columns, which affects the stacking of goods and reduces the effective use of the cold storage. Volume. Among the existing cold storages in China, the multi-storey civil cold storages built in the early 1970s and 80s accounted for the majority. Taking Shanghai as an example, if calculated by capacity, civil cold storages account for 82.41% of the city's cold storage capacity. ; If the statistics are based on the number of blocks, the civil works account for 86.13% of the total blocks.

　　 The advancement of cold storage construction technology has also given civil cold storage more competitive advantages. Dalian Bingshan engineer Ma Shuang said: There are three types of civil multi-storey cold storage. One is a beamless floor structure. There is a market but not mainstream, and the local wholesale market is mainly used. The second is the concrete frame structure, which has realized height and large span, and mechanized operation. The third is the secret beam structure, which realizes large-span operation and has a stable bottom. Bingberg highly recommends users to use this one.

Steel frame structure + insulation board: less investment and more advantages. Currently, the development of light steel structure and the needs of modern logistics are being widely promoted, which has promoted the rapid development of large-column grids and large-span steel-structure prefabricated cold storage. Frame structure cold storage is promoted on a large scale. The steel frame structure cold storage adopts light steel structures such as steel columns and steel beams, and the heat preservation adopts the on-site splicing of prefabricated warehouse boards. There are two structural forms between the light steel structure and the insulation board: one is the outer structure, and the other is the inner structure. The light-weight steel load-bearing structure is on the outside of the insulation board and is called the outer structure. On the contrary, it is the inner structure. The outer structure uses less steel than the inner structure.

　　The steel frame structure cold storage is beautiful, the size, height can be adjusted, the construction period is short, the storage is regular, and the automatic processing can be realized. The disadvantage is that steel structure cold storage is often exposed to wind and rain, coupled with poor personnel management, corrosion, peeling and other problems will occur over time, especially in coastal cities, where typhoons and seawater can exacerbate corrosion. Coupled with outdoor sunlight, it has an impact on the temperature in the cold storage. Frequent start-ups consume energy and parts. At the same time, pay attention to the problem of water leakage at the joints. In recent years, the steel market has been sluggish. The investment in steel-framed cold storage is less than that of civil construction. Coupled with the gathering of various advantages, it has ushered in a development climax.

　　Civil construction + steel construction combination: both civil construction and steel construction have advantages, the mainstream construction method in the future

　　 With the advancement of science and technology and the development of the refrigeration industry, new cold storage construction methods have attracted much attention. For example, the combination of civil and steel construction has replaced the original construction mode and operation mode of cold storage buildings with a new architectural concept, namely, standardization, modularization, and factoryization. The scope of use of this kind of combined cold storage is becoming wider and wider, and the scale of construction is getting larger and larger. It has become the general trend of the development of the world's cold storage industry and has a great development prospect.

　　Combined cold storage has many advantages, such as beautiful appearance, thermal insulation, and strong plasticity. There are dozens of optional colors for the sandwich panel and the outer protective structure, which can meet the needs of any style of building and achieve satisfactory results. The polyurethane or polystyrene sandwich panel has low thermal conductivity, high strength and good thermal insulation effect. All the sandwich panel specifications for the construction of combined cold storage conform to the building modulus, and the cold storage can be divided and arranged at will according to customer requirements. In addition, there are advantages such as short construction period, quick installation, the warehouse meets food hygiene requirements, durable building structure, excellent material quality, and accurate temperature control.