Functions and Characteristics of Pneumatic Small Loading Arms
Pneumatic small loading arms, also known as pneumatic loading arms, are devices that use compressed air as the power source and drive the pipeline connection system through pneumatic actuators for operation. Their working principle is based on air pressure drive. When the system starts, compressed air is delivered into the pipeline through an air treatment system (including compressors, filters, oil-gas separators, etc.). In the pipeline, the compressed air forms a powerful airflow, which can push the materials (liquids or gases) in the pipeline to flow. During the process of being pushed, the materials mix with air to form a gas-material mixture flow, which is then guided to the target position.
The telescopic cylinder is a new type of cylinder composed of two sections of cylinders and one section of oil delivery pipe. One section of the cylinder is a closed compaction cylinder, and the other section is mainly used to lift and lower the oil delivery pipe for telescopic movement, so that the oil delivery pipe can reach the bottom of the oil tank truck to achieve the effect of submersible oil loading.
The new oil delivery pipe's flow diverter is used for submersible oil loading. After passing through the diverter, the oil flows out along the length of the tank truck, without directly impacting the bottom or side walls of the tank truck. The oil flow basically has no rolling phenomenon, and the liquid level rises steadily, which reduces the friction between the oil flow, the tank truck walls, and the air, thus greatly lowering the electrostatic potential generated during oil loading.
A sealing device is installed at the tank truck opening, which significantly reduces the volatilization of oil and gas. Meanwhile, the sealing cover is equipped with an oil inlet pipe and an exhaust pipe. After the oil loading operation is completed, the oil delivery pipe and the main cylinder reset, and the exhaust pipe self-locks to prevent oil and gas from backflowing from the recovery pipe.
The cylinder head, also known as the locking head, prevents the piston and oil delivery pipe from slipping downward after reaching the designated position. It adopts dual self-locking (pneumatic and mechanical) via two cylinders, with high sensitivity. It can generally work under an air pressure of 0.35MPa, featuring strong self-locking force, no influence from air cutoff or air leakage, and high safety and reliability.
With the advancement of science and technology and the improvement of environmental protection requirements, the development trend of pneumatic small loading arms will focus more on safety, efficiency, and environmental protection. In the future, more pneumatic small loading arm products integrating automation and intelligence may emerge to meet the needs of different industries and scenarios.
