Special trailer introduction
A special trailer is a vehicle used in the field of transportation. It has no power of its own and needs to be towed by a tractor to travel. Unlike ordinary trailers, it is specially designed and manufactured for specific transportation tasks or operating purposes. For example, the material, structure and safety facilities of the tank body of a tank trailer used to transport dangerous chemicals are designed according to the characteristics of the transported chemicals to ensure safety during transportation.
Classification
Classification by purpose
Transportation-type special trailer
Van-type special trailer: The compartment of this trailer is closed, like a common logistics van trailer. It can protect the goods from weather and external collisions, and is suitable for transporting some goods that are afraid of water, sun or need to be transported confidentially, such as electronic products, high-end furniture, etc. The compartment materials are usually metal and composite materials. The metal compartment has high strength, while the composite compartment is relatively light.
Tank-type special trailer: Mainly used to transport liquids, gases or powdered materials. For example, the tank body of a tank trailer for transporting petroleum must have good sealing and corrosion resistance. Depending on the transportation medium, there will also be different structures such as wave-breaking plates inside the tank body. For tank trucks transporting liquefied natural gas, the thermal insulation performance of the tank body is extremely high, because liquefied natural gas needs to be stored at low temperatures.
Refrigerated trailer: used to transport goods that need to be stored at low temperatures, such as fresh food, medicines, etc. Its compartment has good thermal insulation performance and is equipped with refrigeration equipment. The refrigeration equipment can achieve a low temperature environment in the compartment through mechanical refrigeration (such as compressor refrigeration) or using refrigeration media such as liquid nitrogen.
Operation-specific trailer
Dump-specific trailer: The compartment of this trailer can automatically dump the goods. It is widely used in construction projects to transport building materials such as sand and gravel. It controls the lifting and lowering of the compartment through a hydraulic system, and the operation is convenient and fast. The design of the dump mechanism should take into account factors such as the weight of the goods and the dumping angle to ensure that the goods can be unloaded smoothly.
Semi-trailer ladder fire truck: This is a special trailer for fire rescue. Its ladder can be extended to a very high position to rescue trapped people in high-rise buildings or for fire fighting operations. The extension length, load capacity and operational flexibility of the ladder are important indicators to measure the performance of this fire truck.
Classification by structural form
Semi-trailer: The front of the semi-trailer is connected to the saddle of the tractor through a towing pin, and part of its own weight is
