Structure of finished oil tankers for automobiles

Structure of oil tank trucks: The tank of an oil tank truck is either elliptical-cylindrical or trapezoidal in shape, and is made from high-quality steel plates. The entire tank can be divided into one compartment or multiple compartments; these compartments can further be divided into sub-compartments. There are holes at the bottom of the intermediate partitions, and reinforcing wave-shaped partitions are welded in the middle of each compartment to reduce the impact of the oil inside the tank during the vehicle’s movement and to increase the tank’s stiffness. 　　To prevent rust, the exterior of the tank is coated with anti-rust paint and decorative paint. A volume indicator is installed in the middle of the side of the oil tank, which allows for direct indication of the volume inside the tank when filling it or transferring oil from it. (Optional) The tank opening is a hole with a diameter of 500 mm, provided for maintenance purposes. The large cover is fastened to the tank mouth gusset plate with bolts, while the small cover is connected to the large cover by a pin and a lug. Turning the handle on the small cover clockwise presses it tightly in place. By reversing and removing the ear flaps, the small cover can be opened; a suction valve is installed on the upper side of the large cover. 　　To ensure that the pressure inside the tank remains roughly equal to atmospheric pressure while the fueling vehicle is in operation, a breather valve is installed on the top cover of the tank. When the oil inside the tank expands due to heat or when fuel is pumped into the tank, the oil level rises and the pressure increases; when the pressure inside the tank exceeds the external pressure by 8 KPA, the upper valve disc of the breather valve opens. When fuel is pumped out of the tank or the oil contracts due to cold, the oil level drops and the pressure decreases; when the pressure inside the tank is 3 KPA lower than the external pressure, the lower valve disc of the breather valve opens. 　　It features functions such as self-priming for oil intake and automatic oil discharge, can pack two to three different specifications of oil, and an optional twin pump is available. 　　The vehicle purchaser must hold a qualification certificate for transporting hazardous materials, while the driver must possess a professional license as well as an escort permit.

Schematic diagram of the structure and working principle of the fuel tanker: 1. Simplified diagram of the fuel tanker’s structure; 2. Vehicle chassis. This fuel tanker is modified using type II chassis developed by Dongfeng Corporation and FAW Group. The structure of the Class II chassis used in each product is detailed in the attached \"Automobile Chassis User Manual\". 3. Oil tank body: The structure of the oil tank is elliptical cylindrical or trapezoidal cylindrical, and it is made of high-quality steel plates. The entire tank is divided into two compartments and four chambers (or multiple compartments and chambers). There are holes at the lower end of the partition in the middle; reinforcing wave-damping partitions are welded in the middle of each compartment to reduce the impact of the oil inside the tank caused by vehicle movement and to increase the stiffness of the tank. (1) Head (2) Enclosure plate (3) Wave-blocking partition (4) Manhole (5) Ladder (6) Secondary beam (7) Support (8) Tank outlet (9) Lifting lug (10) Barrel (11) Cylinder body (12) Indicator (optional for the user). To prevent rust, an anti-rust and decorative paint is applied to the exterior of the tank. An indicator is installed in the middle of the side of the oil tank, allowing for direct indication of the tank’s volume when filling it or transferring oil from it. 4. Tank mouth assembly: (1) Handle; (2) Rocking rod; (3) Movable lifting lug; (4) Small cover; (5) Large cover; (6) Breather valve opening. The tank mouth is a hole with a diameter of 500 mm, provided for maintenance purposes. The large cover is fastened to the tank’s neck plate with bolts, while a pin and a lug plate connect the small cover to the large one; turning the handle on the small cover clockwise presses it tightly against the larger cover. By reversing and removing the ear flaps, the small cover can be opened; a breathing valve is installed on the upper side of the large cover. 3. Breather valve: To ensure that the pressure inside the tank remains roughly equal to atmospheric pressure during the operation of the fueling vehicle, a breather valve is installed on the top cover of the tank. When the oil inside the tank expands due to heat or when fuel is pumped into the tank, the oil level rises and the pressure increases. When the pressure inside the tank exceeds the external pressure by 8 KPa, the upper valve disc of the breather valve opens. When fuel is pumped out of the tank or the oil contracts due to cold, the oil level drops and the pressure decreases. When the pressure inside the tank is 3 KPa lower than the external pressure, the lower valve disc of the breather valve opens. (1) Upper valve body (2) Small spring (3) Large spring (4) Valve stem (5) Lower valve disc (6) Upper valve disc (7) Lower valve body. 4. Power take-off: A power take-off that matches the chassis gearbox is used, and its operating functions will be described later. 5. Oil pump: A self-priming centrifugal oil pump or a gear oil pump can be selected; their performance specifications are provided in the oil pump user manual. 6. Ball valve: The valves used in this vehicle are ball valves, with a certain structure. A ball valve consists of a valve body mounting seat, sealing ring, ball, valve stem handle, and other components. Turning the handle by 90° enables the opening and closing of the ball valve, and its rotatable adjustment via tension control allows it to meet desired requirements. (1) Handle (2) O-ring seal (3) Valve stem (4) Ball valve (5) O-ring seal (6) Seal (7) Adjustment seat (8) Valve body