Author: rui trailer Publish Time: 10-08-2023 Origin: Site
From the functional, currently heavy-duty transportation vehicles are divided into three main kinds: non driven modular trailer (multi axle trailer), driven hydraulic vehicles (self-propelled modular transporter, SPMTs), and supporting transportation vehicle.
Due to the lack of unified standards for the classification of ODC (Over Dimensional Cargo) logistics vehicles, Therefore, each manufacturer names according to their own customs. To give an intuitive impression of heavy-duty cargo transport vehicles, this article focuses on highway heavy-duty cargo transport vehicles (modular trailer/multi axle trailer) and comprehensively analyzes the characteristics and usage of hydraulic multi axle trailer.
Highway modular trailer, multi axle trailer
Highway trucks are a common transportation method for bulk logistics. The characteristic of this transportation method is hydraulic suspension, which enables the trailer to have a great load-bearing capacity and hydraulic lifting function, and can complete the loading and unloading of goods without the need for lifting equipment. modular trailer, multi axle trailer are generally driven by tractors and have a transportation speed of 30~60 km/h, making them suitable for long-distance transportation. At present, there are various types of road heavy-duty transportation vehicles on the market, many of which are specially manufactured for specific equipment transportation, mainly including hydraulic modular trailer, hydraulic multi axle trailer, girder transporter, low bed multi axle trailer, multi axle flatbed trailer for mobile substation, and wind power equipment transport trailer, like wind blade trailer, wind tower trailer, and blade lifter.
As a combination product of hydraulic modular trailer and tractor, self-propelled modular trailer (SPMTs) is equipped with a power system based on the hydraulic modular trailer structure, and each suspension is changed to an independent suspension. The structural shape is standardized and modular, and the axis is continuously connected according to the quality of the goods. It integrates computer, microelectronics technology, hydraulic technology, and wireless communication technology to achieve wireless intelligent operation. Due to its compact structure and standardized module assembly, it can be mechanically or flexibly connected. In theory, modular trailer can be connected to a carrying capacity of 10000 tons, but in practical applications, the usage examples have exceeded 10000 tons. With the continuous promotion of the idea of exchanging space for time, Over Dimensional equipment is assembled and welded in factories. Compared with on-site installation, it not only ensures engineering quality, but also enables multiple components to work simultaneously, saving time. SPMTs are the transportation foundation for this assembly method. Therefore, SPMT trailer have good application prospects in the overall handling of ultra Over Dimensional components such as offshore platforms, substations, hulls, and large engineering buildings. Because it usually transports very huge objects, its speed design is generally slow, with a basic speed controlled within 5 km/h. public information shows that an Italian manufacturer (Cometto) once produced a SPMT equipment with a payload of 3600 tons, which is controlled by an electronic computer and can reflect the movement of the SPMT's center of mass and the changes in the road at every moment through a transmitter. The characteristic is that it has 1152 tires and a load capacity of over 30t, making it the SPMT with the most tires in the world. At present, the total transportation mass of the SPMT is 15000 tons, which adds a lot of legendary colors because it can be used in combination.
Multi axle trailer
As a basic implementation model for the transportation service industry of a logistics company, multi axle trailer are the theoretical basis for the design of most Over Dimensional transport vehicles. Hydraulic multi axle trailer uses traditional hydraulic suspension and overall development of traction steering, with hydraulic systems controlling suspension up and down, three or four point supports, all wheel traction or hydraulic force steering, and all wheel braking. Therefore, it has the characteristics of low bed height, uniform axle load, small turning radius, and flexible, safe, and reliable turning. The box type main chassis frame is manufactured in modular design and production, each module can be connected according to the length and weight of the goods, and any combination can be horizontally or vertically. The connection is fast, the installation is convenient, the operation method is simple and easy, and it has certain self-loading and unloading capabilities. When driving on mountain or slopes, the platform of the multiple axle trailers can be adjusted within a certain range to maintain the relative position of the level. In addition, hydraulic multi axle flatbed trailer is equipped with hydraulic goosenecks, which can be used as hydraulic semi low bed trailers and are suitable for high-speed and long-distance transportation on highways.
Girder bridge is newly developed equipment with a capacity of 300 to 500 tons in the field of highway heavy-duty transportation. The total length will reach 70m, a width of 5.5m, a height of 4.4m, and a carrying capacity of 230t, including a bridge girder carrying capacity of 320t, which can carry up to 500t of transformer. This girder bridge is equipped with an automatic steering system and an independent lifting system, which can achieve automatic or manual steering and lifting of the high girder bridge. It can be used for transportation of transformers, chemical vessel, and other equipment, like tower and reactors.
LOW-PROFILE DROP DECK
The carrying capacity of LOW-PROFILE DROP DECK ranges from 50 to 300 tons. This type of modular trailer adds a LOW-PROFILE DROP DECK between the front and rear modules, mainly to reduce the driving height of the modular trailer axles. When transporting the entire modular trailer axles, the LOW-PROFILE DROP DECK can be lowered to the ground by using the lifting system function of the hydraulic suspension, effectively reducing the driving height.
Other heavy-duty vehicles
Heavy duty vehicles are an important fact of the field of heavy-duty transportation, with relatively giant capacity and speeds less than 30 kilometers per hour. They usually are self-propelled. Due to such vehicles can only be transported on docks and factory in most cases, there is a lack of sufficient attention to the outside world. Due to the diversity of cargo transportation, there are many uses of such transport vehicles, such as shipyard transporter, girder carrier, SPMT, etc.