Classification of large object transportation

Large objects are divided into four levels according to their dimensions and weight (including packaging and supporting frames):

(1) First-level large objects refer to those that meet one of the following standards:< /p>

1. The length is greater than 14 meters (including 14 meters) and less than 20 meters;

2. The width is greater than 3.5 meters (including 3.5 meters) and less than 4.5 meters;

3. The height is greater than 3 meters (including 3 meters) and less than 3.8 meters;

4. The weight is greater than 20 tons (including 20 tons) and less than 100 tons.

(2) Class II large objects refer to those that meet one of the following standards:

1. The length is greater than 20 meters (including 20 meters) and less than 30 meters;

3. The height is greater than 3.8 meters (including 3.8 meters) and less than 4.4 meters;

4. The weight is greater than 100 tons (including 100 tons) is less than 200 tons.

(3) Level 3 large objects refer to those that meet one of the following standards:

1. The length is greater than 30 meters (including 30 meters) and less than 40 meters;

3. The height is greater than 4.4 meters (including 4.4 meters) and less than 5 meters;

4. The weight is greater than 200 tons (including 200 tons) is less than 300 tons.

(4) Level 4 large objects refer to those that meet one of the following standards:

1. The length is 40 meters or more;

2. The width is within 6 meters and above;

3. Height is 5 meters and above;

4. Weight is 300 tons and above.

The grade of a large object is determined by the highest grade among its four conditions: length, width, height and weight. 1. Large electrical equipment

Including: generator stators, rotors, boiler drums, water walls, deaerated water tanks, high and low pressure heaters, large plate beams, etc. in large thermal power generation equipment; large Runners, upper and lower frames, rotors, stators, main shafts, seat rings, water guides, gate hoists, etc. in hydropower equipment; cylinders, nacelles, blades, etc. in large wind power equipment; large nuclear power equipment Generator rotors, stators, main transformers, factory transformers, contact transformers, reactors, etc.

2. Large chemical equipment

Including main equipment in large chemical plants, such as various containers (tanks, tanks, kettles, etc.), ordinary kilns, towers, reactors, etc. Heat exchangers, ordinary dryers, evaporators, reaction furnaces, separation equipment and ion exchange equipment, etc.

3. Other large equipment

Including: aircraft, bridge slabs, subways, large houses, driving beams, etc.

Daily transportation What are the ways?

Theoretically possible, but in practice it cannot be transported by air.

Currently, there are many mainline passenger aircraft with a cargo capacity of 20 tons. However, due to theDue to the layout of the cabin, it is difficult to say whether it can accommodate large molds. Nowadays, small containers matching the cabin are usually used. Even if it is installed, the aircraft trim still needs to be considered, and ordinary freight forwarders simply cannot handle it. This is equivalent to chartered transportation. Whether the cost-effectiveness ratio is cost-effective needs to be carefully considered.

Back then, the An-22’s standard cargo plan was a train car, which was very shocking. In fact, it just ranked among the top ten in the world’s Hercules aircraft.

If long-distance transportation is required, land transportation is more secure. If the goods are extremely long, such as large wind turbine blade molds, special over-the-limit vehicle transportation must be organized. If possible, sea shipping takes a little longer, but the price is cheaper.

1. Railway: Railway transportation is less affected by climate and natural conditions, and its transportation capacity and single vehicle loading capacity are large. It has advantages in the continuity and low cost of transportation. In addition, There are many types of vehicles on the world, allowing it to transport almost any commodity with almost no restrictions on weight and volume, which are incomparable to road and air transportation.

2. Highway: The most popular mode of transportation among land transportation modes, it is a powerful supplement to railway transportation. The current road transportation tool is automobile.

3. Waterway: large transportation capacity. Among the five modes of transportation, waterway has the largest transportation capacity. In waterways with good transportation conditions, the passing capacity is almost unlimited. Affected by the climate, the general performance of water and land transportation is also good. It can transport both passengers and cargo. It can transport all kinds of goods, especially large goods.

4. Aviation: It has fast running speed and good maneuverability. It can fly over almost all kinds of natural obstacles and reach places that are difficult to reach by other modes of transportation. It is suitable for transporting long-distance, valuable, urgently needed, small quantity, time-sensitive goods, etc.

5. Walking: Walking is the most environmentally friendly mode of transportation and is not limited by weather and traffic conditions. It is very convenient.

Extended information:

The development history of transportation modes:

Transportation is an indispensable part of modern people's social life.

At first, humans tamed some animals such as horses and donkeys as riding tools or power sources for riding tools (such as carriages). At the same time, sedan chairs and wind-powered sailboats also served as a means of transportation. Animal-drawn vehicles have coexisted for a long time. Transportation powered by human power, animal power, and wind power have occupied most of human history.

It was not until James Watt invented the steam engine in 1769 that the development of human transportation entered a stage of rapid development. In just a few hundred years, humans could not only go to the sky (airplanes, space shuttles, rockets), but also enter the sea ( Submarine), technology is also changing with each passing day... In addition, there are steam stage, internal combustion stage, electrical stage and automation stage.

The steam stage was a representative transportation industry during the British Industrial Revolution.The equipment is steam trains, steam ships, etc., which have been basically eliminated. China's steam trains officially withdrew from the stage of history in October 2009. At that time, CCTV's social record Aqiu reported on it.

Diesel engines, gasoline engines, etc. are all products of the internal combustion engine stage. The means of transportation include cars, motorcycles, tractors, etc. Before 2009, most motor vehicles were powered by internal combustion engines. The theoretical basis of the steam and internal combustion stages is the law of energy conversion.

The mutual transformation between electricity and magnetism lays a theoretical foundation for the development of electric vehicles. Motors, generators, etc. are the basic equipment at this stage. The invention and rapid commercialization of electric vehicles have placed electric vehicles on the shoulders of existing means of transportation such as cars and motorcycles, creating an unparalleled historical mission for electric vehicles. It is a historical necessity that electric vehicles will eventually become the upgrade and replacement of the above-mentioned products.