1 What is a flatbed semi-trailer?
A flatbed semi-trailer is a trailer whose axle is placed behind the center of gravity of the vehicle (when the vehicle is evenly loaded) and is equipped with a coupling device that can transmit horizontal and vertical forces to the tractor. Semi-trailers are generally three-axle semi-trailers, and their types are divided into eleven-meter warehouse semi-trailers, 13-meter warehouse semi-trailers, and low-flat semi-trailers. It is a heavy-duty transportation vehicle connected with the semi-trailer head through a tow pin.
2 Features of flatbed semi-trailer
Compared with “monolithic” vehicles, semi-trailers can improve the comprehensive economic benefits of road transportation. The transportation efficiency can be increased by 30-50%, the cost can be reduced by 30-40%, and the fuel consumption can be reduced by 20-30%. More importantly, the use of semi-trailers can also promote the logistics to a certain extent.
3 Application of Flatbed semi-trailer
Semi-trailers are mainly used to transport bulky goods that are bulky and difficult to split, such as excavators, etc. The fence type is more suitable for pulling fresh and live goods, such as vegetables, fruits, etc. Van type is more suitable for pulling bulk cargo and preventing moisture More expensive goods.
4 Difference of Flatbed semi-trailer
Different from a full trailer, a semi-trailer is a trailer whose axle is placed behind the center of gravity of the vehicle (when the vehicle is evenly loaded) and is equipped with a coupling device that can transmit horizontal or vertical force to the tractor. Generally, a full trailer has two axles, half One axle of the trailer. Semi-trailer refers to a vehicle that has no power and shares with the main vehicle and is driven by the main vehicle.
Simply put, the trailer is connected to the truck in front with a hook. The semi-trailer is connected to the towing seat of the tractor through the towing pin. The common container transporter is a typical semi-trailer, and the rear loading part is the semi-trailer.
There are also differences in usage. Full trailers are mainly used for short-distance transportation in factories, ports, docks, warehouses, etc., while semi-trailers are mainly used for long-distance transportation of goods.
5 Flat semi-trailer classification
5.1 Dump semi-trailer
Dump semi-trailer is suitable for the transportation of bulk and scattered goods such as coal, ores, and construction materials. Dump semi-trailers can be divided into two categories according to their uses: one is heavy-duty and super-heavy dump trailers for off-highway transportation, which mainly undertake transportation tasks such as large-scale mines and projects, and are usually used in conjunction with excavators. The other type of light and medium-sized ordinary dump trailers for road transportation are mainly responsible for the transportation of loose goods such as sand, soil, and coal, and are usually used in conjunction with loaders.
5.2 Low flatbed semi-trailer
The low-floor semi-trailer has no rails on the vehicle-mounted part and has a wide range of uses, mainly for medium and long-distance freight transportation. The frame of the series semi-trailer is a through-beam structure, and the longitudinal beam adopts a straight and live gooseneck type. The web height ranges from 400mm to 550mm, the longitudinal beams are welded by automatic submerged arc welding, the frame is shot blasted, and the cross beams penetrate the longitudinal beams and weld the whole. Composed of tandem dry plate spring and suspension support, the structure is reasonable, with strong rigidity and strength, used to support the load and buffer the impact. Low-flat semi-trailers are usually used to transport heavy vehicles (such as tractors, buses, special vehicles, etc.), rail vehicles, mining machinery, forestry machinery, agricultural machinery (such as excavators, bulldozers, loaders, paving machines, cranes, etc.) And other heavy-loaded goods, the lower the center of gravity, the better the stability and safety, and the stronger the ability to transport ultra-high goods and pass overhead obstacles.
5.3 Warehouse grid semi-trailer
Warehouse-type semi-trailer is a semi-trailer designed with a fence structure for the cargo part. Mainly used for the transportation of agricultural and sideline products and other light foam goods.
- The car model and fence structure design process is combined with the user’s cargo category and rationally designed to fully reduce the weight of the carriage under load conditions. The structure is simple and applicable, and it is convenient to disassemble, reducing investment costs for users and creating more profit value.
- Frame: A space frame structure formed by welding longitudinal beams and integral cross beams. It can balance the strength, rigidity and toughness of the frame, with strong bearing capacity and no permanent deformation.
- The series of warehouse-grid semi-trailer frames are all beam-through structures, and the longitudinal beams are of straight or gooseneck type. The height of the webs ranges from 400 to 500, the longitudinal beams are welded by automatic submerged arc welding, the frame is shot blasting, and the cross beams penetrate the longitudinal beams and weld the whole.
- Suspension system: adopts a new type of suspension system with high strength and strong impact resistance; the load of each axle is balanced, and the system tie rod angle is reasonably designed to reduce the friction slip distance between the tire and the ground during frequent turbulence. , Effectively reduce tire wear, and at the same time, adjustable tie rods and wheelbase can be adjusted, effectively avoiding the phenomenon of partial running-in and gnawing of tires.
5.4 container semi-trailer
The container semi-trailer is a semi-trailer whose cargo part is a container structure. Mainly used in logistics systems supporting ships, ports, routes, highways, transfer stations, bridges, tunnels, and multimodal transport.
5.5 Tank Semi-trailer
The tank semi-trailer is a semi-trailer whose cargo part structure is a tank structure. Mainly used to transport liquids, bulk materials and bulk cement.
1. The tank truck series are divided into oil tank trucks, concrete mixer trucks, powdered materials and, water supply trucks, etc.
2. The tank body is manufactured by three-dimensional design and advanced processing technology. The chassis adopts special chassis from various manufacturers, with advanced technology and reliable performance. Cargo truck with canned containers.
high efficiency of loading, unloading and transportation. Guarantee the quality of the goods. Conducive to transportation safety. Reduce labor intensity and improve loading and unloading conditions. Save packaging materials and labor. Reduce transportation costs. Liquid tank cars: transport fuel, lubricating oil, acids, alkalis, water, food and beverages, etc. Powder tank cars: transport cement, flour, stone powder, etc. Gas tank trucks: transport nitrogen, argon, petroleum gas, etc., pellet tank trucks: transport grains, beans, granular plastics and other granular items. Other special tank trucks: concrete mixer truck, sprinkler truck, sweeper truck, etc.
Tank trucks are classified according to the pressure in the container: low-pressure tank trucks (the internal pressure of the tank is generally below 0.09Mpa. Mainly for water, light fuel, etc.) medium-pressure tank trucks (the internal pressure of the tank is generally 0.147-0.294Mpa .Mainly load caustic alkali, asphalt, etc.) high-pressure tank truck (the internal pressure of the tank body is generally 1.177-3.532Mpa).
5.6 Van semi-trailer
Van semi-trailer series products are used for the transportation of household appliances, textile goods, coal, sand and stone and other construction materials, as well as the goods of the picture plate. The box body is made of high-strength cold rolled corrugated steel plate, no framework structure, centered everywhere, diverse options, large loading space, reasonable distribution in the box body, X-type bracing, with the characteristics of multiple pull, heavy load, and light weight. There are closed type, push-pull open type, open type, open tarpaulin rod type, etc., which are easy to operate and meet the diverse and personalized requirements of users.
5.7 Dump truck
A car with a dump truck compartment equipped with an automatic tipping device. Also known as dump truck and engineering vehicle, it consists of an automobile chassis, a hydraulic lifting mechanism, a power take-off device and a cargo compartment. In civil engineering, it is often combined with excavators, loaders, belt conveyors, etc. to form a loading, transporting and unloading production line for loading and unloading of earthwork, sand, and loose materials. Since the loading carriage can automatically tip over a certain angle for unloading, the unloading time and labor are greatly saved, the transportation cycle is shortened, the production efficiency is improved, the transportation cost is reduced, and the loading volume is marked. It is a commonly used transport machinery.
5.8 Oil semi-trailer
The oil transport semi-trailer is mainly used for the transportation of large oil materials, and the tonnage is generally about 40~60 cubic meters. There are usually two-axle semi-trailers and three-axle semi-trailers. The material of the square tank body of the oil transport semi-trailer is made of Q235A steel plate. The tank body has built-in multi-channel reinforced wave-proof clapboards. . The combined tank mouth is located on the top of the tank body, there is a self-locking small cover above the large cover, and a breathing valve is installed on the upper side of the large cover to ensure the same atmospheric pressure inside and outside the tank; with electrostatic grounding wire.
5.9 Light semi-trailer
As the name suggests, an ultralight semi-trailer is a vehicle that is much lighter than an ordinary car. How much lighter is an ultralight? The industry definition is that a vehicle with the same weight, size, and weight as an ordinary vehicle is defined as an ultralight.
5.10 icle transport semi-trailer
A semi-trailer designed with a fence structure for the vehicle-transporting semi-trailer. It mainly carries cars, but can also carry passenger cars such as vans, commercial vehicles, and jeeps. 1. The body is a rod, cabinet frame structure, light structure, light weight, mostly upper and lower loading platforms, the platform adopts hydraulic cylinder opening, steel wire rope pulley structure, stable lifting, high positioning and other advantages.
5.11 der material transportation semi-trailer
The powder material transportation semi-trailer is a special vehicle for the transportation of large quantities of dust materials (bulk cement). It is generally suitable for areas where the weight toll is strictly implemented in accordance with national regulations. The volume is generally between 35-45 cubic meters. It is suitable for the transportation and air pressure unloading of dry materials such as fly ash, cement, lime powder and ore powder with a particle diameter of not more than 0.1mm. When the vertical height of the unloading reaches 15m, the horizontal conveying distance can reach 5m.
5.12 mical liquid transport semi-trailer
Chemical liquid transportation semi-trailers have different requirements for tank materials according to the characteristics of the media being transported. Commonly used chemical tank body materials are: stainless steel (202, 304, 316L), carbon steel, plastic steel (plastic lined tank), glass fiber reinforced plastic, aluminum tank, all-plastic tank (polyethylene, polypropylene), etc., all-plastic tank series selection Polyethylene is the main raw material formula technology, and the whole plastic and plastic steel products are formed at one time. It has the characteristics of no joints, no leakage, corrosion resistance, aging resistance, impact resistance, non-toxicity, long life, and low price. It is suitable for most Acid, alkali, salt, alcohol, aldehyde storage, transportation, reaction, mixing, waste water and gas treatment.
The heavy-duty low-bed semi-trailer is a trailer that is used for loading oversized and overweight cargo. The basic form of a heavy trailer is a monocoque trailer. It generally has the following structure. The frame and the axles and axles are mostly collinear, that is, there are two left and right axles on one axis, which is also called a two-axle row.
5.14 rier semi-trailer
The semi-trailer of the fence type semi-trailer is a semi-trailer with a fence structure. It has a wide range of uses, mainly suitable for medium and long-distance transportation of medium and heavy-duty and bulk cargo. It has strong applicability and has become the first choice for medium and long-distance freight vehicles.
5.15 seneck semi-trailer
Gooseneck semi-trailer trucks are also very extensive, suitable for the transportation of various mechanical equipment, large objects, road construction equipment, large tanks, power station equipment and various steel materials. The series semi-trailers have flat, concave beam and tire exposed structures. The longitudinal beams are straight or gooseneck. The frame is stepped and the longitudinal beam section is I-shaped, which has the characteristics of high rigidity and high strength.
5.16 leton container semi-trailer
The skeleton container transporter is a kind of container transport semi-trailer frame and the other is the flatbed type. The skeleton type car is welded by longitudinal beams, cross beams and front and rear beams. The longitudinal beams are made of high-quality steel 16Mn submerged arc welded into an I-shape (the main dimensions are 450 and 500). The beams are made of high-quality steel plates. The beams are of welded rectangular section.
5.17 meters 5 low flatbed semi-trailer
The 17m5 low flatbed semi-trailer is usually used to transport heavy vehicles (such as tractors, buses, special vehicles, etc.), rail vehicles, mining machinery, forestry machinery, agricultural machinery (such as excavators, bulldozers, loaders, paving machines) , Cranes, etc.) and other heavy-duty goods, the lower the center of gravity, the better the stability and safety, and the stronger the ability to transport ultra-high goods and pass overhead obstacles.
5.18 k cement tank transport semi-trailer
Bulk, (bulk cement truck) alias cement tanker, powder material truck. Cars with airtight cargo compartments and automatic unloading devices, which are used to transport bulk cement. It is mainly used for cement plants, cement warehouses and large construction sites, which can save a lot of packaging materials and loading and unloading labor.
6 Precautions for the use of flatbed semi-trailers
When turning a corner, pay attention to whether there are pedestrians in the blind spot of the viewing angle, especially those riding a battery car, which suddenly appear silently. Always check your tires before you travel.
When reversing, the direction is the opposite, so you should drive slowly and return slowly, not too much, and don’t panic if you watch six directions and listen to all directions.
If you travel far, it is necessary to inspect the vehicle. The necessary inspections include: the half-shaft screw drive of the vehicle, the screw drive, the screw, the horn, the light, the tire pressure, and these are necessary.
Be careful not to move the steering wheel a lot while driving, because if the body is too long and moving, it may cause a rollover and cornering, but also pay attention to try to make as much space as possible, otherwise the tail will be difficult to pass and it will be easy to throw people.
Do not use the “first release and rear brake” approach to brake running-in. Although this can relatively reduce the impact on the engine when braking, it may cause danger, and once a habit is formed, it is even worse. During the running-in period of a new car, check whether the engine oil, coolant, and battery electrolyte are sufficient. If it is missing, it must be refilled in time. After reaching the mileage specified by the manufacturer, go to the service station for the first inspection and maintenance of the vehicle, change the oil, filter, etc., and check the chassis system comprehensively. Completing the first guarantee means that the trailer has passed the running-in period smoothly and can serve you better from then on.
7 Flatbed semi-trailer maintenance matters
7.1 Tire inspection
The tire pressure should be checked at room temperature every month. If it is lower than the normal standard, the tire pressure should be replenished in time. The air pressure cannot be too high or too low, otherwise it will affect the safety of driving. Check the tire for cracks, and replace the tire in time if there is a safety hazard. When choosing tires, the model should be the same.
7.2 Maintenance and inspection of the battery
Check whether the battery is firmly fixed, the electrolyte should be between the upper limit and the lower limit, and the electrolyte or distilled water should be added to the upper line in time when it is close to the offline. Keep the positive and negative cables of the battery in good contact, and keep the battery clean and dry. For vehicles that have been stored for a long time, remove the positive and negative cables of the battery, and re-wire the battery after about half a month. After starting the engine for about 20 minutes, charge it in time if the battery is obviously insufficient.
7.3 Check the liquid level of the clutch master cylinder
If the clutch fluid level is between high and low fluid level, it means it is normal. If it is lower than the standard line, it may be that the master cylinder or the sub-pump cup is damaged. When the engine is running, it will be difficult or impossible to shift the gear. Please go to the nearest maintenance station for maintenance.
7.4 Check the brake fluid level
The braking is also between high and low, which means it is normal. If the brake fluid is close to the lower limit or lower than the lower limit, it means that there may be leakage in the system or excessive wear of the brake shoes, and you should go to the maintenance station for maintenance in time. When adding brake fluid, pay attention to adding the same type of brake fluid to prevent damage to the leather cup, and pay attention to protecting the paint to prevent corrosion of the paint surface.
7.5 Engine coolant level inspection
Never open the radiator cover when the engine is in a warm state, otherwise you may be scalded by the spilled coolant or high-temperature steam. After the engine is cooled, check that the liquid level of the coolant should be between the full level and the low level. Otherwise, distilled water or pure water or refrigerant should be added. The height of the liquid level after adding water should not exceed the full level. If it is found that the cooling fluid has decreased rapidly in a short period of time, check the cooling system for leaks or go to the maintenance station for inspection.
8 Where can I buy a flatbed semi-trailer?
Panda Mechanical Co., Ltd approved by the ministry of industry and information technology of China to produce kinds of semitrailer and commercial vehicles. PANDA MECH has first-class manufacturing machines and kinds of testing equipment, introduce international advanced technology and research with famous truck manufacture improve design strength. Each vehicle produced by skillful and experience workers, pass 120 item QC inspections, supply perfect products to the world.