+ 86 15153217198
EMAIL ADDRESS
info@shiyuntrailer.com
+ 86 15153217198
info@shiyuntrailer.com
The core feature of the SHIYUN hydraulic flatbed transporter is hydraulic lifting and leveling. It can be operated via onboard cab or wireless remote control.
It is mainly used for in-plant transportation, widely applied in shipyards, marine industrial parks and heavy industrial zones.
It is commonly used for the handling and transfer of hull sections, complete hull blocks, bow and stern components, ship superstructures, large steel structures and hull modules inside workshops.
It is also suitable for the heavy-duty in-yard transportation of large pressure vessels, offshore engineering equipment and other heavy oversized cargo.
Designed for hull blocks / sections & dock transfer; 35–1000 ton capacity. High-strength one-piece frame, rigid & torsion-resistant for heavy ship components.
Ground-level travel for easy access to docks & ramps; large hydraulic lift stroke adapts to different dock blocks & heights for precise positioning.
4/6/8/16 axles optional; independent hydraulic suspension + auto-levelling. Stable transport, protects hull accuracy, mm-level positioning.
Electro-hydraulic servo steering; straight, diagonal, crab, 360° in-place rotation. Precise docking in narrow docks/berths.
Dual engines + dual-pump confluence hydraulic system. One engine fails, the other keeps running; supports 24/7 continuous transfer.
Standard long deck; dual telescopic beams optional, extendable to 12m. Ideal for long hull sections & superstructures.
Front/rear driving cab + wireless remote. Safe long-distance operation in docks & confined spaces.
Shot blasting + heavy-duty anti-corrosion paint; marine-grade electrical/hydraulic components. Long life in coastal high-salt environments.
Integrated single platform, no assembly needed. Direct loading/unloading of hull blocks; faster lifting & docking for frequent shipyard transport.
Overview
The flatbed vehicle is a self-lifting, self-propelled tyre-type special transport vehicle for hull sections and other heavy structural components. It serves as a transportation device linking various working procedures in modern shipbuilding processes. The flatbed vehicle consists of a frame platform, drive suspension, driven suspension, engine power unit, hydraulic lifting system, hydraulic drive system, hydraulic steering system, hydraulic oil supply unit, braking system, vehicle electrical system and micro-electronic control system.
Power System
The power system is mainly composed of an engine, elastic coupling, variable displacement pump, hydraulic oil tank, fuel tank and auxiliary devices, arranged beneath the vehicle frame. The engine model is reasonably selected according to the rated load capacity and operational requirements, with its power output capable of meeting the grade-climbing requirement under full-load conditions and long-term continuous operation demand. The engine throttle is controlled by an electric foot-operated throttle system.
Vehicle Frame
Frame Structure and Platform Cover Plate The main material of the frame is high-strength Q345B steel, featuring strong bending resistance and good flexibility under torsional load. The vehicle has sufficient margin in overall strength and rigidity to bear uniform loads. Warning signs such as “Caution: Risk of Scalding” near the engine exhaust pipe and “Caution: Pinch Hazard” around cab doors and windows are installed. Lifting lugs are fitted on the steel body, with their specific positions marked on the outer side of longitudinal beams. All components suspended under the frame (cab, cooling oil tank, hydraulic oil tank, cooling water tank, electric control box, intercooler, diesel tank) shall be equipped with shock-absorbing devices. Removable grid-type steel cover plates are fitted on the lifting platform, with an actual thickness of no less than 5 mm.
Hydraulic Drive System
Equipped with a hydrostatic drive system, the flatbed vehicle ensures smooth acceleration and travel. The rotational speed of the diesel engine and vehicle travelling speed are controlled by a foot accelerator, enabling stepless speed regulation within the range of 0–12 km/h to fully utilise engine power. The diesel engine is connected to the hydraulic pump via a torque damper. The variable displacement pump transmits power through a closed pipeline system to the variable hydraulic motors integrated inside drive axles. The hydraulic motors deliver driving force to planetary drive gearboxes, propelling the whole vehicle to travel in preset modes.
Hydraulic Suspension
Hydraulic suspension is divided into drive suspension and brake suspension, mainly composed of suspension bracket, balance arm, suspension cylinder, drive axle, brake axle or follow-up axle, wheel rim, tire and other components. The wheel axle enables the whole vehicle to have a vertical adjustment range of ±300 mm through the expansion and contraction of suspension cylinders. A reducer and motor are installed on the drive suspension to realize vehicle travelling function. The brake suspension is equipped with brake axles with brake air chambers to service service braking and parking braking of the vehicle.
Slewing Bearing
single-row ball slewing bearing is adopted. Both the inner and outer races of the slewing bearing are forged from high-quality alloy steel, delivering strong load-bearing capacity. # 7. Tire Specification The tire specification of the flatbed vehicle is 8.25-16.
Hydraulic Steering System
The flatbed vehicle adopts electronically controlled-hydraulic steering to realize multi-mode steering.
The wheel set is driven by a hydraulic motor directly mounted on it through a wheel-side reducer, and can swing to adapt to cross-slope conditions.
Brake Axle
11. Braking System
The flatbed vehicle adopts a pneumatic braking system. The equipment can be braked at any time as required during movement, with reliable braking performance.The vehicle is also equipped with a parking brake. When the vehicle is out of service for a long time, the hand brake valve and parking relay valve cut off the braking air of dual brake wheel cylinders, enabling the parking springs to clamp the wheel sets tightly.
The pneumatic braking system is supplied with air by the engine-built air compressor. Air is cooled via heat-dissipating pipes, then filtered and dehumidified by an air dryer. Afterwards, the air flows to a four-circuit protection valve, which keeps the dual pipelines separated to prevent air backflow and leakage
12. Hydraulic Oil Cooler and Hydraulic Oil Tank
Heat dissipation of hydraulic oil is implemented in two separate circuits. One hydraulic cooling system separately cools the return oil from the hydraulic drive system before returning it to the hydraulic oil tank. The other hydraulic cooling system draws hydraulic oil from the tank via a hydraulic pump and feeds it into the cooler for cooling, after which the cooled hydraulic oil flows directly back into the tank.
13.Cab
One control cabin is installed below each longitudinal end of the load-bearing platform. Each cabin is equipped with a 360-degree industrial-grade camera and display monitor.
Every control cabin features good ventilation, windscreen wipers and cleaning devices. The seat is adjustable forward and backward with a reclinable backrest. Both cabins are fitted with independently temperature-adjustable air-conditioning units and fans with external units. Air-conditioning outlets are reasonably arranged with concealed pipelines. The air conditioners are electrically powered (independently installed, not driven by diesel engines) and only available when the cabin enters the operating mode.
Cab doors are rear-hinged, fitted with sliding glass panes. Door and window glass is safety glass, providing the operator with good forward and lateral visibility. Each cabin is equipped with a fire extinguisher, two rear-view mirrors and sun visors. Control switches, equipment displays and gauges are rationally arranged to ensure easy operation and safe monitoring of the flatbed vehicle.
14. Safety System
14.1 Hydraulic Pipe Burst-proof Device
A dual-line protection valve is adopted to protect the lifting system. In case of pipeline rupture, pressure drop will rapidly generate a flow pulse to seal the damaged pipeline at the explosion-proof valve. The other pipeline keeps all cylinders of its group connected. The full-axle load compensation function is completely maintained, enabling the transporter to continue its transportation tasks.
14.2 Overpressure Protection Device
Each circuit of the hydraulic lifting system of the flatbed vehicle is equipped with an independent overflow valve to prevent system overload and protect lifting cylinders and wheel frames.
14.3 Overload Prevention Device
Pressure sensors are installed at four corners of the lifting system to monitor platform load in real time. The buzzer inside the cab will sound in case of overload or eccentric load. The vehicle will be prohibited from travelling when the load at any single point exceeds 10% of the rated value.
14.4 Emergency Lowering Device
An emergency lowering safety valve is fitted under the frame platform for manual platform lowering under emergency conditions.
14.5 Emergency Stop Function
One emergency stop button is installed inside each cab and at four corners under the frame to stop the vehicle in emergencies.
14.6 Lighting and Warning Devices
Each side at both ends of the load-bearing platform is equipped with rear-view mirrors, normal work lights, turn signals, brake lights, running warning lights and buzzers. Perimeter light strips around the vehicle for night operation are also required. Four-corner work lights with vertically adjustable illumination angles are provided. All lamps and buttons have an IP66 protection rating.
14.7 Lifting Platform Cover Plates
Removable grid-type steel cover plates are fitted on the lifting platform with a thickness of no less than 5 mm.
14.8 Hydraulic Hose Layout
Hydraulic hoses shall be kept free from collision and contact with structural components under all operating conditions.
15. Electrical System
The electronic control system consists of a special-purpose controller for engineering vehicles, display monitors, angular displacement sensors, pressure sensors, control unit boxes and other components.
The operating voltage of the whole vehicle is 24 V, equipped with two 180 AH storage batteries.
Engine Control System: It is provided with a power key switch, start switch, electric stop button, main emergency power-off stop button, fuel level gauge, air pressure gauge and hour meter.Vehicle Speed Regulation and Control System: The engine throttle is controlled by an electric foot-operated throttle system.
A multi-functional alarm control system is configured, including alarms for low diesel engine lubricating oil pressure, high cooling water temperature, blockage of air filter, high-pressure oil filter, suction pipe filter and return pipe filter. It also features status display and alarms, platform overload alarm, pre-alarm for gravity center exceeding critical range, and hydraulic oil pressure alarm. Light-triggered alarms are used for blockage of high-pressure filter, oil outlet filter and oil return filter.
Lighting System: The cab is fitted with two sets of main headlights, interior ceiling lights, regular work lights, turn signals, brake lights and running warning lights.
16. Hydraulic System
The hydraulic system of this machine comprises travelling drive, steering and suspension systems.The drive hydraulic system is a closed-circuit system composed of variable displacement pumps and motors. The pump displacement is electronically controlled. Working parameters of the main pump or variable displacement motor can be adjusted according to actual vehicle load, so as to fully utilize engine power, improve productivity and save energy.
The steering and suspension hydraulic systems are open-circuit systems. Each steering-suspension bogie is driven by one steering cylinder. Hydraulic suspension is adopted, with its lifting, lowering and leveling controlled by solenoid valves.
17. Lifting
Lifting points are designed on the flatbed vehicle to enable integral lifting of the vehicle at transport terminals and ensure safe and reliable lifting operations.
